The present invention relates to a piston ring arrangement for a hydrogen engine, comprising a sealing system piston ring and a compression ring, which are configured to be used over an oil control ring and over an oil scraper ring, wherein the piston ring arrangement is configured to control a pressure increase through blow-by between the sealing system piston ring and the compression ring such that a pressure between the sealing system piston ring and the compression ring, especially in the second part of the work cycle, is between 60° and 450 after ITDC, preferably between 50° and 540° after ITDC, more preferably between 20° and 540° after ITDC and still more preferably between 0° and 540° after ITDC higher than pressure in the combustion chamber of the cylinder, wherein these pressure ratios are achieved at speeds of between 60 and 5000 rpm, preferably 1500 to 4500 rpm, more preferably between 2000 and 4000 rpm, and most preferably between 2500 and 3500 rpm.
The present invention relates to a compression piston ring (2) having an upper ring flank (8), a lower ring flank (10), an inner surface (6), at least part of which is substantially cylindrical, and an outer surface (4), at least part of the profile of which is convex, wherein the outer surface (4) is provided with a groove (14), which runs externally in the circumferential direction, and wherein this groove is located in the profile of the piston ring at a height (HR) between 1/5 and 3/5 of the height (HG) of the compression piston ring, and wherein the compression piston ring is also provided with an encircling recess (16) at the location at which the convex outer surface (4) and the lower ring flank (10) meet.
A piston ring for internal combustion engines is provided, having a surface comprising a wear protection layer of iron or an iron alloy applied to the surface, wherein the wear protection layer has cracks and the cracks have an average density of 10-160 cracks per mm of the wear protection layer, wherein the iron or iron alloy have incorporated therein 0.2-15% by weight, based on the total weight of the wear protection layer, of carbon particles and 0.2-15% by weight, based on the total weight of the wear protection layer, of solid particles other than carbon particles. Furthermore, a method for manufacturing a piston ring is provided.
A compression ring, has a ring running surface (2) on a first butt end region, a ring running surface (2′) on a second butt end region, a ring inner surface (4), a top ring flank surface (6) and a bottom ring flank surface (8), wherein the ring has overlapping first and second butt end regions. The first butt end region has at least one protrusion (10) in the circumferential direction, and the second butt end region has at least one recess (12) in the circumferential direction. The at least one protrusion (10) forms at least one axial and/or radial overlap surface, and the at least one recess (12) forms at least one parallel surface, which lies at least partially opposite to the axial and/or radial overlap surface in order to shift parallel to one another in response to a change of the butt play. At least one of the surfaces, which can be shifted parallel to one another, is provided with an axial wear element (14) and/or with a radial wear element (14′).
A piston ring includes a ring outer side, an upper ring flank and a lower ring flank, whereby the ring outer side has a pressure relief chamfer at an upper edge, so that only a lower part of the ring outer side forms a contact surface. An axial dimension of the contact surface varies in the circumferential direction.
A sliding element, in particular a piston ring, comprises a coating having the following layers from the inside to the outside: an adhesive layer, a carbon-containing functional layer and an outer amorphous DLC layer. The layer thickness of the carbon-containing function layer is at least 70%, preferably at least 80%, of the total layer thickness of the coating, and the Young's modulus ratio of carbon-containing functional layer to outer amorphous DLC layer is 1.2 or more.
An oil scraper ring (4) includes a ring element (6), having an upper ring edge (8), a lower ring edge, a ring inner side and a ring outer side (14. The ring element (6) is provided with two opposing contact surfaces (20), between which there is a ring gap (18. The ring element (6) is provided with at least one scraper bar (24, 26) on the ring outer side (14. The oil scraper ring (4) is provided with two recesses (28), each arranged on each contact surface (20), and each adjoining at least on the ring outer side (14), the respective contact surface (20) and the upper ring edge (8).
A piston ring system for an internal combustion engine includes a first compression piston ring (2), a second compression piston ring (4), and an oil scraper piston ring (6). The first compression piston ring (2) has a first ring body (8) with a first upper ring flank (10), a first lower ring flank (12), a first ring inner side (14), a first ring outer side (16), as well as two first abutting surfaces. A first contact region (18) of the first ring body (8) is arranged with a cylinder running surface (20) above a first piston ring center (22). At least one first oil pocket (24) is arranged below the first contact region (18) in the circumferential direction. The second compression piston ring (4) having a second ring body (26) a second upper ring flank (28), a second lower ring flank (30), a second ring inner side (32), a second ring outer side (34), as well as two second abutting surfaces. A second contact region (36) of the second ring body (26) is arranged with the cylinder running surface (20) above or below a second piston ring center (38). At least one second oil pocket (40) is arranged below the second contact region (36) in the circumferential direction. The oil scraper piston ring (6) is formed in one piece, two pieces, or three pieces.
An oil scraper ring is provided for pistons (2) of an internal combustion engine having an oil scraper piston ring groove (4) formed without at least one oil drain bore. The scraper ring includes a ring body (6) comprising an upper ring flank (8), a lower ring flank (10), a ring inner side (12), a ring outer side (14) and two abutting surfaces (16, 18). An upper oil scraper rail (20) and a lower oil scraper rail (22) extend in the circumferential direction in spaced apart relation from one another in the axial direction and extend radially to the outside from the ring outer side (14) are arranged on the ring outer side (14). Oil passages (24) running in the radial direction are arranged in a region between the upper scraper rail (20) and the lower scraper rail (22), and at least one groove (26) extends in the radial direction on the lower ring flank (10).
The bipolar plate has, on a steel substrate, an anisotropic nanocrystalline carbon layer which is attached to the substrate via a carbidic interlayer. The carbon atoms of the anisotropic nanocrystalline carbon layer are arranged predominantly in sp2 coordination in graphitic nanocrystallites such that the c axes of the graphitic nanocrystallites are aligned highly parallel to the surface of the substrate. The process for production of the bipolar plate comprises polishing the steel substrate prior to the application of the subsequent layers and then depositing the anisotropic nanocrystalline carbon layer on the substrate surface by a PVD method. Finally, an amorphous outer carbon layer that has formed during the PVD operation is removed from the anisotropic nanocrystalline carbon layer. This simultaneously hydrophilizes and/or functionalizes the surface of the carbon layer.
A piston ring includes a base body having an inner circumferential surface, first and second flank surfaces and an outer circumferential surface, wherein a first hard chromium layer with a crack network is applied to the outer circumferential surface and has a crack density of 10-250 cracks per mm and solid particles having an average particle size of 0.01-10 μm embedded in cracks of the first hard chromium layer, a second hard chromium layer having a crack network applied to the first hard chromium layer and having a crack density of the crack network of 10-250 cracks per mm, no solid particles being embedded in the cracks thereof, where the cracks have an average width of 1-15 μm, the cracks are electrolytically expanded and the surface proportion of the cracks are 3-25% based on a total surface of the second hard chromium layer.
A sliding element, in particular a piston ring, includes a base material of martensitic or austenitic stainless steel having a chromium content of at least 6.0% by mass and a nitrided layer having a surface hardness of up to 950 HV1. A method of producing such a sliding layer is also provided.
The invention relates to a piston ring for internal combustion engines, having a surface, comprising a wear protection layer made of iron or iron alloy applied onto the surface, wherein the wear protection layer has cracks, said cracks having an average density of 10 - 160 cracks per mm of the wear protection layer, wherein 0.2 - 15 wt.% of carbon particles are incorporated into the iron or iron alloy based on the total weight of the wear protection layer, and 0.2 - 15 wt.% of solid particles, which are not carbon particles, are incorporated into the wear protection layer based on the total weight of the wear protection layer. A method for producing a piston ring is also disclosed.
The invention relates to a compression ring comprising a ring running surface (2) on a first butt end region, a ring running surface (2') on a second butt end region, a ring inner surface (4), a top ring flank surface (6) and a bottom ring flank surface (8), wherein: the ring has overlapping butt end regions; the first butt end region has at least one protrusion (10) in the circumferential direction, and the second butt end region has at least one recess (12) in the circumferential direction; the at least one protrusion (10) forms at least one axial and/or radial overlap surface, and the at least one recess (12) forms at least one surface that is at least partially opposite and parallel to the axial and/or radial overlap surface in order to move parallel to one another when the butt play changes; and at least one of the surfaces that can move parallel to one another is furnished with an axial wear element (14) and/or with a radial wear element (14').
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
B23P 15/06 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
A multi-piece oil scraper piston ring includes a slotted spring element and at least one lamella element which is operatively connected to the slotted spring element and provided with a joint, the spring element being designed as a meander spring that axially receives and radially supports the lamella element, the two end regions of the meander spring being provided with legs that extend approximately parallel to one another and the axial length of which is designed such that the legs at least partially engage in the joint of the lamella element.
Disclosed is a piston ring (2), comprising a ring outer side (4), a ring upper flank (6) and a ring lower flank (8), the ring outer side (4) having, at an upper edge (10), a pressure relief chamfer (12) so that only a lower part of the ring outer side forms a contact surface (14), characterized in that an axial dimension of the contact surface (14) varies in the circumferential direction (18).
A sliding element according to the invention, in particular a piston ring, has a coating which has the following layers from the inside to the outside: an adhesive layer, a carbon-containing functional layer and an outer amorphous DLC layer. The layer thickness of the carbon-containing functional layer is at least 70%, preferably at least 80% of the total layer thickness of the coating, and the elasticity modulus ratio of carbon-containing functional layer to outer amorphous DLC layer is 1.2 or more.
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 14/02 - Pretreatment of the material to be coated
The present invention relates in general to a piston ring which has an anti-wear layer (6, 22) on a substrate (2), a transition layer (8, 24) on the anti-wear layer (6, 22), and a running-in layer (10, 26) on the transition layer (8, 24), wherein the transition layer provides a mechanically and thermally stable bonding of the layers.
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
20.
PISTON RING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH DIRECT WATER INJECTION
The invention relates to a piston ring system for an internal combustion engine, comprising a first compression piston ring (2), a second compression piston ring (4), and an oil scraping piston ring (6). The first compression piston ring (2) has a first ring body (8) with a first upper ring flank (10), a first lower ring flank (12), a first ring inner face (14), a first ring outer face (16), and two first abutting surfaces, and a cylinder running surface (20) of a first contact region (18) of the first ring body (8) is arranged above a first piston ring center (22), at least one first oil pocket (24) being arranged below the first contact region (18) in the circumferential direction; and the second compression piston ring (4) comprises a second ring body (26) with a second upper ring flank (28), a second lower ring flank (30), a second ring inner face (32), a second ring outer face (34), and two second abutting surfaces, and a cylinder running surface (20) of a second contact region (36) of the second ring body (26) is arranged above or below a second piston ring center (38), at least one second oil pocket (40) being arranged below the second contact region (36) in the circumferential direction, wherein the oil scraping piston ring (6) is a two-part or three-part oil scraping ring.
The invention relates to a cylinder sleeve or a cylinder for an internal combustion engine, comprising an inner face (2) which forms a running surface, the cylinder sleeve or the cylinder having at least a thermal insulation (4) which extends in the circumferential direction around the cylinder sleeve or around the cylinder, the insulation (4) being arranged with a spacing from the running surface in the radially outward direction.
A piston ring has a running surface, an inner surface, a lower ring flank, and an upper ring flank. A recess, extending across the perimeter in the shape of an internal angle, is located at the transition between the inner surface and the upper ring flank. The recess defines a conical first surface and a conical second surface at the piston ring. The first surface lies farther outward, when viewed in the radial direction, and farther above, when viewed in the axial direction, than the second surface. In an axial cross section, a first angle between the axial direction and the first surface lies in the range between 10° and 50°, and a second angle between the radial direction and the second surface lies in the range between 5° and 30°. A piston having a piston ring groove includes a projection on the groove bottom. A combination made from an above-mentioned piston ring and an above-mentioned piston are adapted to one another, so that the projection projects into the recess.
The invention relates to an oil scraper ring (4) comprising a ring element (6), having an upper ring edge (8), a lower ring edge, a ring inner side and a ring outer side (14), wherein the ring element (6) is provided with two opposing contact surfaces (20), between which there is a ring gap (18), wherein the ring element (6) is provided with at least one scraper bar (24, 26) on the ring outer side (14), and wherein the oil scraper ring (4) is provided with two recesses (28), each arranged on each contact surface (20), and each adjoining at least on the ring outer side (14),the respective contact surface (20) and the upper ring edge (8).
The invention relates to an oil scraper ring for pistons (2) of an internal combustion engine, wherein an oil scraper piston ring groove (4) of the piston (2) is provided without at least one oil drain bore, comprising a ring body (6) having an upper ring flank (8), a lower ring flank (10), a ring inner face (12), a ring outer face (14) and two abutting surfaces (16, 18), wherein an upper oil scraper rail (20) and a lower oil scraper rail (22) are provided on the ring outer face (14), which rails extend in the circumferential direction so as to be mutually spaced in the axial direction and extend radially outwardly from the ring outer face (14), wherein oil passages (24) are provided which extend in the radial direction in a region between the upper oil scarper rail (20) and the lower oil scraper rail (22), and wherein at least one groove (26) extending in the radial direction is formed in the lower ring flank (10).
A three-part oil scraper ring includes an upper scraper ring (24), a lower scraper ring (26), wherein the scraper rings (24, 26) are held at a distance by an expander spring (34) and pressed radially outwards. The upper scraper ring (24) has a ring body (4) having an upper flank (6), a lower flank (8), a ring inner surface (10) and a ring outer surface (12) which has a ring outer contour (14) in cross-section in axial direction (A). The ring body (4) has a height H which, when viewed in axial direction (A), corresponds to the greatest distance of the upper flank (6) from the lower flank (8). The ring outer contour (14) forms a running surface (16) which has a radius of curvature R which is smaller than the height H of the upper scraper ring (24) by a factor between 1.5 to 6.
A multi-piece piston ring includes an upper scraper ring 10 comprising two flank surfaces, an outer scraping surface/edge, and an inner spring contact surface. A lower support ring 4 includes two flank surfaces, an outer spring contact surface, and a support ring inner surface. An expander spring/spiral spring 8, which, on an upper and lower side, is operational to abut against a respective lower flank surface of the upper scraper ring 10 and against the upper flank surface of the support ring 4. Scraper ring contact projections protruding upwards on an inner spring side, and support ring contact projections protruding downwards on an outer spring side, wherein the scraper ring contact projections are to each abut against the inner spring contact surface of the scraper ring 10, and support ring contact projections protruding downwards are to abut against the outer spring contact surface.
The invention relates to a piston ring having a main body. The main body has an inner peripheral surface, a first flank surface, a second flank surface and an outer peripheral surface. A first hard chromium layer having a network of cracks is applied to the outer peripheral surface. The network of cracks of the first hard chromium layer has a crack density of 10-250 cracks per mm, and solid particles having an average particle size of 0.01-10 µm are embedded into the cracks of the first hard chromium layer. A second hard chromium layer having a network of cracks is applied to the first hard chromium layer. The crack density of the network of cracks of the second hard chromium layer is 10-250 cracks per mm, and no solid particles are embedded into the cracks of the second hard chromium layer. The cracks at the surface of the second hard chromium layer have an average width of 1-15 µm, the cracks at the surface of the second hard chromium layer are electrolytically expanded, and the surface proportion of the cracks at the surface of the second hard chromium layer is 3-25%, with respect to the entire surface of the second hard chromium layer.
C25D 3/04 - ElectroplatingBaths therefor from solutions of chromium
B32B 15/00 - Layered products essentially comprising metal
C25D 5/14 - Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
C25D 5/18 - Electroplating using modulated, pulsed or reversing current
C25D 5/48 - After-treatment of electroplated surfaces
C25D 7/00 - Electroplating characterised by the article coated
C25D 15/02 - Combined electrolytic and electrophoretic processes
F16J 9/00 - Piston-rings, seats thereforRing sealings of similar construction in general
The present application relates to a sliding element, in particular a piston ring, and to a method for producing same, wherein the sliding element comprises a base material made of martensitic or austenitic stainless steel having a chromium content of at least 6.0 mass percent and a nitriding layer having a surface hardness of up to 950 HV1.
The invention relates to a multi-part oil control ring (1), comprising a slotted spring element and at least one lamella element (3, 4), which is operatively connected to the spring element and is provided with a butt joint (7). The spring element is in the form of a meander spring (2) that axially receives and radially supports the lamella element. The two end regions of the meander spring are provided with legs (9, 10) running approximately parallel to each other, the axial length of which legs is such that the legs at least partly engage in the butt joint of the lamella element.
A three-part oil scraper ring includes an expander spring and two scraper rings, comprising a ring body (4) having an upper flank (6), a lower flank (8), a ring inner surface (10) and a ring outer surface (12) which has a ring outer contour (14) in cross-section in axial direction (A). The ring body (4) has a height H which corresponds to the greatest distance of the upper flank (6) to the lower flank (8). The ring outer contour (14) forms a running surface (16) which has a radius of curvature R which is smaller than the height H of the scraper ring (2) by a factor between 1.5 to 6, preferably between 3 to 5 and further preferably between 3.5 to 4.5.
The invention relates to an MF expander spring 20 for a three-part oil scraper ring 2, 4, 6, 8. It comprises a steel band, which is corrugated in a trapezoidal or diamond-shaped manner in the axial direction, wherein the MF expansion spring 20 has axial protrusions 30, 32, which are intended to abut in each case against an upper or lower oil scraper ring 34, 36 from the inside in the radial direction, in order to press said axial protrusions outwards against an inner cylinder surface, comprises upper flat sections 24, which are intended to abut against an upper scraper ring 34, 36 of a three-part oil scraper ring 2, 4, 6, 8 in the axial direction, comprises lower flat sections 23, which are intended to abut against a lower scraper ring 34 of the three-part oil scraper ring 2, 4, 6, 8 in the axial direction, and comprises flank sections 26, 28, which extend between the upper flat sections 24 and the lower flat sections 22. At least every second flank section 26 forms an acute angle (α) with the associated upper or lower flat sections 22, 24.
A play-free oil scraper ring has a cross section with a running surface leg having at least one scraper web that is situated on a running surface, an upper piston ring flank leg that is connected to the running surface leg, and the upper surface of which forms an upper piston ring flank. A lower piston ring flank leg is likewise connected to the running surface leg, the lower surface of which forms a lower piston ring flank. The upper and/or the lower piston ring flank leg are/is elastic, taper(s) inwardly in the radial direction, and their/its piston ring flank(s) essentially form(s) a conical surface in an uninstalled state. The uninstalled piston ring has an axial height that exceeds a width of a piston ring groove for which the piston ring is intended.
A piston ring (10) has a running surface (12) and a flank surface (14) which are coated. The uppermost layer of the running surface (12) is a hydrogen-containing or a hydrogen-free DLC layer, and the uppermost layer of at least one flank surface (14) is a chromium layer. A method of producing a piston ring (10) includes forming a DLC layer as the uppermost layer of the running surface (12), and forming a chromium layer as the uppermost layer of at least one flank surface (14).
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
F02F 5/00 - Piston rings, e.g. associated with piston crown
35.
DEVICE FOR SEALING A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE
The invention relates to a device for sealing a combustion chamber of an internal combustion engine, comprising at least one piston and a cylindrical component which receives said piston, wherein the piston is movable within the component alternately between an upper and a lower end position, wherein the component, in the upper end position range of the piston, can be placed in operative connection with at least one seal element which is inserted in a groove and which is provided with a joint, wherein the seal element is formed as an internally bracing seal ring and is provided with a profiling in the region of the inner circumferential surface thereof, which inner circumferential surface faces toward the piston, and wherein the piston has the upper end position range thereof in the region of the level of the profiling.
A piston ring is produced from a main body made of steel or cast steel and comprising a running face, an inner circumferential surface, upper and lower flank regions, and transition regions from the running face to the respective flank region, by coating the running face and the transition regions with a first chromium layer, removing this first chromium layer at the running face down to the base material of the main body, providing at least the running face of the layer-free main body with a nitride layer, and, finally, coating the running face and the transition regions with at least one further chromium layer.
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
B23P 15/06 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
A piston ring is provided, in particular a compression piston ring having at least one recess with a lower edge running obliquely to the upper piston ring flank on its upper piston ring flank, the ring flank extending radially outward from the piston ring interior and radially inward from the piston ring bearing surface. The piston ring has a chamfer, which is opposite at least one recess. At least one recess and the chamfer extend in the radial direction up to at most the center of the cross-sectional area of the piston ring.
A piston ring (1) is provided, having a bearing surface (2), an inner surface (4), a lower ring flank (6) and an upper ring flank (8), wherein, at the transition between inner surface and upper ring flank, there is situated a cutout (10) which runs over the circumference and which is in the form of an internal angle, wherein the cutout defines a conical first surface (12a) and a conical second surface (12b) on the piston ring. The first surface is situated, as viewed in a radial direction, further toward the outside and, as viewed in the axial direction, further toward the top, than the second surface. In an axial cross section, a first angle (a) between the axial direction and the first surface lies in the range between 10° and 50°, and a second angle (ß) between the radial direction and the second surface lies in the range between 5° and 30°. Also provided is a piston with a piston ring groove, wherein a projection is arranged on a groove base. Furthermore, a combination of an above piston ring and an above piston is provided, which piston ring and piston are adapted to one another such that the projection protrudes into the cutout.
The invention relates to a three-part oil scraper ring, comprising an upper scraper ring (24) and a lower scraper ring (26), wherein the scraper rings (24, 26) are maintained at a distance by an expander spring (34) and pressed radially outwards, wherein the upper scraper ring (24) has a ring body (4) with an upper side (6), a lower side (8), a ring inner surface (10) and a ring outer surface (12), which has a ring outer contour (14) in a cross-sectional view in the axial direction (A), wherein the ring body (4) has a height H corresponding to the greatest distance of the upper side (6) from the lower side (8) when viewed in the axial direction (A), wherein the ring outer contour (14) forms a running surface (16) having a radius of curvature R that is smaller than the height H of the upper scraper ring (24) by a factor of between 1.5 and 6.
The invention relates to a three-part oil scraper ring, with an expander spring and two scraper rings, comprising a ring body (4) with an upper side (6), a lower side (8), a ring inner surface (10) and a ring outer surface (12), which has a ring outer contour (14) in a cross-sectional view in the axial direction (A), wherein the ring body (4) has a height H that corresponds with the greatest distance of the upper side (6) from the lower side (8), wherein the ring outer contour (14) forms a running surface (16) having a radius of curvature R that is smaller than the height H of the scraper ring (2) by a factor of between 1.5 and 6, preferably between 3 and 5, and particularly preferably between 3.5 and 4.5.
The invention relates to a multi-piece piston ring (10) comprising: a top oil scraper ring (2) with two flank faces (24, 26), an outer scraper face/edge (20) and an inner spring bearing face (22); a bottom support ring (4) with two flank faces (44, 46), an outer spring bearing face (40), and a support ring inner face (42); and an expander spring/bending spring (8), the top and bottom sides (80, 82) of which are intended to bear against a bottom flank face (26) of the top oil scraper ring (2) and against the top flank face (44) of the support ring (4), respectively; and oil scraper ring bearing projections (84) projecting upwards on an inner side of the spring and support ring bearing projections (86) projecting downwards on an outer side of the spring, wherein the oil scraper ring bearing projections (84) are intended to bear against the inner spring bearing face (22) of the oil scraper ring (2), and downward-projecting support ring bearing projections (86) are intended to bear against the outer spring bearing face (40).
A piston ring, and in particular a compression piston ring, has a running face, upper and lower flank regions, an inner circumferential surface and a joint, wherein at least the running face is provided with at least one wear-resistant PVD or CVD layer, wherein the PVD or CVD layer extends at a predefinable layer thickness across a circumferential length of more than 95%, but less than 100% of the piston ring, and defined circumferential sections are designed in a layer-free manner in the region of the joint.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Piston ring coatings of metal. Sliding elements (parts of machines) for machines, motors
and engines, included in this class; piston rings. Vehicles; apparatus for locomotion by land, air and water.
A stepped piston ring (2) includes a ring outer side (5), an upper ring flank (6), and a lower ring flank (8). The ring outer side (5) on the upper edge has a notch (10, so that only a lower portion of the ring outer side (5) forms a contact surface (4).
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
B24B 19/11 - Single purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding the circumferential surface of rings, e.g. piston rings
45.
PISTON RING AND PISTON RING/PISTON COMBINATION WITH IMPROVED WEAR PROPERTIES
The invention relates to a piston ring for a two-stroke engine with a wear display, comprising a piston ring body with an outer face, two piston ring flanks, and a piston ring inner face. The invention is characterized in that the outer face is equipped with at least two layers of thermally sprayed layers which lie one over the other radially and which have at least two different colors in a determined order and can thereby be differentiated by color. The radially lowermost layer or lowermost layers are dyed red by adding Cu or CuFeAl, wherein preferably the copper component of the lowermost layer or the lowermost layers is between 30 and 50 wt.%.
The invention relates to an MF expander spring (20) for a three-part oil scraper ring (2, 4, 6, 8). This comprises a steel strip that is corrugated in a trapezium- or diamond-shape in the axial direction, wherein the MF expander spring (20) has axial protrusions (30, 32) which are intended to each rest against an upper or lower scraper ring (34, 36) in the radial direction from the inside, in order to press these outwards against an inner surface of a cylinder, and wherein the MF expander comprises: upper flat sections (24) which are intended to rest on an upper scraper ring (34, 36) of a three-part oil scraper ring (2, 4, 6, 8) in the axial direction; lower flat sections (23) which are intended to rest on a lower scraper ring (34) of the three-part oil scraper ring (2, 4, 6, 8) in the axial direction; and side sections (26, 28) extending between the upper flat sections (24) and the lower flat sections (22). At least every second side section (26) forms an acute angle (α) with the associated upper or lower flat sections (22, 24).
The present invention relates to a two-part oil scraper ring, which comprises an L-shaped base body and an axial stabilization element. The L-shaped base body has a ring flank leg, which is pressed against a piston ring groove flank by the axial stabilization element, and a bearing surface leg, on which a scraping web is arranged. A twist compensation is attained by means of a suitable selection—and in particular variation—of hearing surface leg length, ring flank leg length and axial position of the scraping web.
An oil wiper ring is provided having two circumferential shoulders, the running surfaces whereof are outwardly curved, wherein the shoulder of the combustion chamber side has an axial height greater by at least a factor of 2 than the axial height of the shoulder on the crankcase side and wherein the should on the combustion chamber side has an asymmetrical crowning.
A piston ring (10) has a running surface (12) and flank surfaces (14) which are coated, wherein the uppermost layer of the running surface (12) is a hydrogen-containing or hydrogen-free DLC layer, and said piston ring (10) is characterized in that the uppermost layer of at least one flank surface (14) is a chromium layer. In a method for producing a piston ring (10), a DLC layer is configured as the uppermost layer of the running surface (12), and a chromium layer is configured as the uppermost layer of at least one flank surface (14).
A one-piece control ring with two stripping ridges and openings that extend from the outside of the ring to the inside is provided wherein the cross section of the ring body varies in the circumferential direction. This variation is achieved with internal grooves, the cross-sectional area of which decreases in the direction of the back of the ring, and with a variation of the depth of the groove lying between the ridges.
The invention relates to a combination of a piston and a two-part oil scraper ring. The piston has a stepped piston ring groove having a main groove and a secondary groove. The two-part oil scraper ring comprises a base, which has a ring flank leg and a cylinder-wall leg, and a spring element, which is configured to exert a radial force on the base. The ring flank leg and the spring element are configured so as to extend into the main groove, and the cylinder-wall leg is configured to be located at least partly in the secondary groove when the oil scraper ring is mounted in the ring piston groove. In addition, a two-part oil scraper ring for a piston having a stepped piston ring groove is provided.
A compression piston ring is provided, in particular a piston ring suitable as a second piston ring in a three-ring piston ring set, which piston ring has convex sections and concave sections alternating in the circumferential direction in a middle running face region in relation to the axial height, wherein the concave sections form profile recesses in the convexly crowned running face.
A sliding element, in particular a piston ring, has a coating which has the following layers from the inside outwards: a polycrystalline, metal-containing adhesive layer, an intermediate layer, and at least one amorphous carbon layer, the intermediate layer having the following partial layers from the inside outward: an AxCy layer, with c standing for carbon, A standing for a metal, preferably of the metal-containing adhesive layer, and x as well as y each comprising values of 1-99, and a crystalline-containing or crystal-containing carbon layer.
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 14/02 - Pretreatment of the material to be coated
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 14/32 - Vacuum evaporation by explosionVacuum evaporation by evaporation and subsequent ionisation of the vapours
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
55.
Multiple-piece oil stripping piston ring with reduced friction
A three-piece piston oil control ring 2 has an upper, disc-shaped scraping ring 4, a lower, disc-shaped stabilising ring 6, and a circular expander 8 which has projections 10 protruding in the axial direction on an inner face. The circular expander 8 is arranged between the upper scraping ring 4 and the lower stabilising ring 6, wherein the projections 10 each bear inwardly against an inner face 14 of the scraping ring 4 or against an inner face 16 of the stabilising ring 6. An outer radius 18 of the scraping ring 4 is greater than an outer radius 20 of the lower stabilising ring 6, so that there is a radius difference δ between the scraping ring 4 and the stabilising ring 6.
The invention relates to a piston ring set comprising three piston rings, an upper compression ring (4) having a low butt play and good sealing, a central oil wiper ring (6) and a lower compression ring (8), likewise having low butt play and good sealing, and a piston (24) for such a piston ring set.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Carbon coated rings made of metallic materials or alloys or
predominantly made of metallic materials or alloys. Sliding elements (machine parts) of machines and engines,
included in this class; piston rings. Vehicles; apparatus for locomotion by land, air or water.
Method for producing a piston ring consisting of steel or cast steel, by providing a main body comprising a running surface, an inner circumferential surface, upper and lower flank regions and transitional regions from the running surface to the respective flank region, coating the running surface including the transitional regions with a first chrome layer, removing this first chrome layer in the region of the running surface down to the base material of the main body, providing at least the running surface of the layer-free main body with a nitriding layer and subsequently coating the running surface and the transitional regions with at least one further chrome layer.
C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
C25D 5/48 - After-treatment of electroplated surfaces
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
The invention relates to a multipart oil scraper piston ring containing a slotted spring element and at least one lamella element which is operatively connected to the spring element and is provided with an abutting region. The abutting ends of the lamella element are provided in an overlapping manner in the region of the mutually facing lamella element abutting regions such that one of the abutting ends of the lamella ring is stepped when viewed in the axial direction. The height of the step corresponds to the axial thickness of the lamella element such that the free limb of the stepped abutting region engages beneath the non-stepped end region over a specifiable length, and the spring element is a meander spring, the winding sections of which are formed with a reduced overall height in the overlapping region of the lamella element when viewed in the axial direction.
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
F16J 9/20 - Rings with special cross-sectionOil-scraping rings
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
The invention relates to an oil control ring, containing a running surface region, formed by at least two running surface webs, an inner circumferential surface and upper and lower flank surfaces extending between the running surface region and the inner circumferential surface, furthermore containing a joint and oil passage openings extending radially from the outside inward between the running surface webs, in operative connection with a spring element as applicable, wherein the joint is formed by at least two slot regions, which are spaced apart from each other and not in direct contact with each other and have a specifiable shape and dimension, in such a way that every slot region formed by a slot extends from the associated flank surface at least up to an oil passage opening provided between at least two running surface webs.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Carbon ring coating of metallic materials or alloys or
predominantly metallic materials or alloys. Sliding elements (machine parts) of machines and engines,
included in class 7; piston rings. Vehicles; Apparatus for locomotion by land, air or water.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Carbon ring coating of metallic materials or alloys or
predominantly metallic materials or alloys. Sliding elements (machine parts) of machines and engines,
included in class 7; piston rings. Vehicles; Apparatus for locomotion by land, air or water.
The invention relates to a play-free oil scraper ring, the cross section of which comprises: a running surface limb having at least one scraper web which is arranged on a running surface, an upper piston ring flank limb which is connected to the running surface limb and the upper surface of which forms an upper piston ring flank, a lower piston ring flank limb which is likewise connected to the running surface limb and the lower surface of which forms a lower piston ring flank, wherein the upper and/or the lower piston ring flank limb is elastic, tapers inward in the radial direction and the piston ring flank of which substantially forms a conical surface in the uninstalled state, and wherein the uninstalled piston ring has an axial height which exceeds a width of a piston ring groove for which the piston ring is intended.
The invention relates to a piston ring, in particular a compression piston ring, comprising, on a top piston ring flank, at least one recess having a bottom edge extending obliquely with respect to the top piston ring flank, which recess extends radially outward from the inside of the piston ring or extends radially inward from the piston ring running surface. The piston ring has a chamfer opposite the at least one recess. The at least one recess and the chamfer extend in the radial direction at the most up to an area centre of gravity of a cross-sectional area of the piston ring.
The invention relates to a piston ring, in particular a compression piston ring, containing a running surface, upper and lower face regions, an inner peripheral surface, and a joint, at least the running surface being provided with at least one wear-resistant PVD or CVD layer, wherein the PVD or CVD layer extends with a predeterminable layer thickness over a peripheral length of more than 95%, but less than 100%, of the piston ring, and defined peripheral portions in the region of the joint are not provided with this layer.
The running face of a compression piston ring also having an inner circumferential surface, and upper and lower flank surfaces interposed between the running face and the inner circumferential surface is provided, in a region thereof adjacent the lower flank, with a first taper of less than 30′, having an axial height of 10 to 30%, based on the total running face height (H), the first taper transitioning into a second taper extending in the direction toward the upper flank surface, which is between 90′ and 200′, and the running face is also provided with a thin wear-resistant layer having a thickness from 0.1 to less than 20 μm, and in particular 4 to 6 μm.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Piston ring coatings. Sliding elements (parts of machines) for machines, motors and engines, included in class 7; Piston rings. Vehicles; Apparatus for locomotion on land, air and water.
A compression piston ring 2 having a running-surface region 4, an upper flank 6, a lower flank 8 and also an inner circumferential surface 10, wherein the running-surface region 4 is provided with a profiled section, which, as viewed over the axial height of the running-surface region 4, comprises mutually spaced, convexly spherically constructed sections 12, 14 having an upper and lower apex So; Su, wherein a groove 16 with a depth Tn is arranged between the apexes So, Su, wherein both apexes So; Su are arranged below a centre M of the piston ring 2 in the axial direction.
The invention relates to a piston ring, having a ring body (14) of gray cast iron, which has a region of ledeburite microstructure (4) on at least one ring flank (8), which region of ledeburite microstructure extends to the ring running-surface edge and extends into the ring running surface (10), wherein an anti-wear layer (6) is applied to the ring running surface (10), which anti-wear layer also covers the region of ledeburite microstructure (4). The invention further relates to a method for producing such a piston ring.
The present invention relates to a stepped piston ring (2), comprising a ring outer side (5), an upper ring flank (6), a lower ring flank (8), wherein the ring outer side (5) has a recess (10) on an upper edge, so that only a lower part of the ring outer side (5) forms a running surface (4).
The invention relates to an oil control ring (1) for an internal combustion engine, having two webs (3, 4) arranged axially one over the other in the region of the running surface (5, 6) of the oil control ring, wherein both webs form the running surface (5, 6) when in contact with a counter running surface (10) and the webs (3, 4) are provided with a profile (11, 13, 14) on the counter-running-surface side, which profile has an at least partial coating (13, 15) if necessary, wherein the two webs (3, 4) are provided with different web geometries in such a way that the lower web (4) takes on most of the scraping action in the downward stroke and the upper web (3) substantially floats on a residual oil film on the counter running surface (10) during the upward stroke.
The invention relates to a two-part oil control ring, which comprises an L-shaped main body and an axial stabilization element. The L-shaped main body has a ring flank leg, which is pressed against a piston ring groove flank by the axial stabilization element, and a cylinder-wall leg, on which a scraping ridge is arranged. Twist compensation is achieved by suitable selection, and in particular variation, of the cylinder-wall leg length, the ring flank leg length, and the axial position of the scraping ridge.
The invention relates to a sliding element, in particular a piston ring, to a method for producing same, and to the use of the sliding element in a tribological system. The sliding element has a coating which has at least one adhesive layer and a MAX phase layer from the inside towards the outside. The MAX phase layer has the composition Mn+1AXn (n = 1, 2, 3), wherein M represents an element from the group Sc, Ti, V, Cr, Zr, Nb, Mo, Hf, and Ta, A represents an element from the group Al, Si, P, S, Ga, Ge, As, Cd, In, Sn, Tl, and Pb, and X represents the elements C or N.
C23C 4/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 4/08 - Metallic material containing only metal elements
C23C 4/10 - Oxides, borides, carbides, nitrides or silicidesMixtures thereof
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
The invention relates to a one-piece oil control ring, which has two scraping ridges (2) and openings (3), which extend from the outside of the ring to the inside; wherein the cross-section of the ring body varies in the circumferential direction. This variation is achieved by internal grooves (5), the cross-sectional area of which decreases toward the back of the ring, and by variation of the depth of the groove lying between the ridges.
The invention relates to an oil control ring, comprising two circumferential ridges (3, 4), the sliding surfaces of which are curved outward, wherein the ridge (3) on the combustion chamber side has an axial height (K) that is greater than the axial height (S) of the ridge (4) on the crankcase side by at least a factor of 2, and wherein the ridge on the combustion chamber side has an asymmetric roundness.
The invention relates to a compression piston ring (1), in particular a piston ring suitable as a second piston ring in a three-ring piston ring set, which piston ring has convex sections (Ax) and concave sections (Av) in alternation in the circumferential direction in a sliding surface region (BM) that is central with respect to the axial height, wherein the concave sections forms profile recesses in the convexly rounded sliding surface (2).
The invention relates to a sliding element, in particular a piston ring, having a coating which comprises the following layers from the inside to the outside: a polycrystalline, metal-containing adhesive layer, an intermediate layer, and at least one amorphous carbon layer, wherein the intermediate layer comprises at least the following sub-layers from the inside to the outside: an AxCy layer, wherein C is carbon, A is a metal, preferably a metal from the metal-containing adhesive layer, and x and y are each values of 1-99; and a crystalline-containing or crystal-containing carbon layer.
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 14/32 - Vacuum evaporation by explosionVacuum evaporation by evaporation and subsequent ionisation of the vapours
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 14/02 - Pretreatment of the material to be coated
The invention relates to a piston ring which is provided with a DLC (Diamond-like Carbon) layer as a functional/wear protection layer, wherein the DLC layer is covered by a protective layer, the material of which is different from that of the DLC layer and the material of which has a higher temperature resistance than the material of the DLC layer. In addition, the invention relates to a method for producing a piston ring having a DLC wear protection layer, the protective layer being provided in the surface thereof in the form of deposits in recesses present as a result of the surface roughness.
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 14/18 - Metallic material, boron or silicon on other inorganic substrates
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 14/04 - Coating on selected surface areas, e.g. using masks
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
The present invention relates to a three-piece oil stripping piston ring (2) having an upper disc-shaped stripping ring (4), a lower disc-shaped stabilizing ring (6), and a circular expander (8) which has projections (10) which protrude in the axial direction on an inner side, wherein the circular expander (8) is arranged between the upper stripping ring (4) and the lower stabilizing ring (6), wherein the projections (10) bear in each case on the inside against an inner side (14) of the stripping ring (4) or an inner side (16) of the stabilizing ring (6), and wherein an outer radius (18) of the stripping ring (4) is greater than an outer radius (20) of the lower stabilizing ring (6), with the result that there is a radius difference δ between the stripping ring (4) and the stabilizing ring (6).
The invention relates to a method for calibrating an oil consumption measurement device for a combustion engine, wherein, outside the combustion engine, a container for a calibration mixture consisting of oil and a radioactive tracer is provided, the calibration mixture is supplied to an evaporator/burner, air is supplied to the evaporator/burner, the calibration mixture is evaporated/combusted in the evaporator/burner, in such a way that the oil portions with the tracer are evaporated via the pre-heated air and combusted directly thereafter, the combustion residues from the evaporator/burner are introduced into the exhaust gas flow of the combustion engine, a particle filter is provided in the exhaust gas system downstream of the feed point of the combustion residues, when viewed in the exhaust gas flow direction, the combustion residues collected in the particle filter and containing the radioactive tracer are measured using an activity measurement device, and the measurement result is provided to a protocol and evaluation unit.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Surface coatings (paints) for nitriding of machines,
apparatus, motor parts, or motors; wear protection coatings
(paints) for nitriding of machines, apparatus, motor parts
or motors, in particular piston rings or pistons. Pistons and parts thereof for machines and motors; piston
rings; shock absorbers. Vehicles; apparatus for locomotion by land, air or water.
87.
Sliding element, in particular piston ring, and method for producing the same
A sliding element, in particular a piston ring has an outer circumferential running surface of the piston ring, has no nitriding layer, preferable no surface hardening the running surface has as an outermost layer, which differs from the intermediate layer, a DLC layer or a metal-based nitride layer, preferable a metal nitride layer, preferably a CrN layer. Provided between the substrate of the sliding element and the DLC layer there is at least one metal-containing intermediate layer, preferably a metal layer, particularly preferable a chromium layer, and at least one further surface of the sliding element, preferably the piston ring flanks, is surface-hardened, preferably has a nitriding layer.
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 14/16 - Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
C25D 7/00 - Electroplating characterised by the article coated
09 - Scientific and electric apparatus and instruments
Goods & Services
Sliding elements for machines; engine parts of metal or
plastic; pistons and parts therefor for machines, motors and
engines; piston rings; shock absorbers; all the aforesaid
goods included in this class. Software for monitoring and improving piston rings;
apparatus for monitoring and improving piston rings.
A piston ring for a piston of a piston engine has an external circumferential surface (2), and internal circumferential surface (4), and upper flank (6) pointing in the direction of the piston upper side, and a lower flank (8) pointing in the direction of the piston underside. The lower flank (8) runs obliquely with respect to the upper flank (6), so that axial height (A) of the piston ring is grater at the external circumferential surface (2) than the axial height (B) at the internal circumferential surface (4), and wherein on each side of the thrust of the piston ring at least one recess (10) is provided in the upper flank (6).
The invention relates to a piston ring for an internal combustion engine, comprising at least one recess provided on a ring flank of the piston ring, the at least one recess having a varying depth profile in the peripheral direction of the piston ring.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
[ Surface coatings in the nature of paints for nitriding of machines, apparatus, motor parts, or motors; wear protection coatings in the nature of paints for nitriding of machines, apparatus, motor parts or motors, in particular piston rings or pistons ] Pistons and parts thereof for machines and motors; piston rings; shock absorbers for machines [ Vehicles, namely, land vehicles, trucks, cars, space vehicles; apparatus for locomotion by land, air or water, namely, land vehicles, trucks, cars, space vehicles ]
09 - Scientific and electric apparatus and instruments
Goods & Services
[Sliding elements for machines; pistons and parts therefor for machines, motors and engines; piston rings; shock absorbers for machines] Software for monitoring and improving piston rings; Monitoring apparatus for monitoring piston performance characteristics; Calibration devices for calibrating pistons
The invention relates to a compression piston ring, comprising a running surface, an inner peripheral surface, and upper and lower flank surfaces extending therebetween, wherein a slight taper ឬ 30' having an axial height of 10-30%, with respect to the total running-surface height (H), is formed on the running-surface side in the region of the lower flank surface, which slight taper transitions into a taper that extends in the direction of the upper flank surface and that has a magnitude between 90 and 200', and wherein a thin wear-resistant layer having a thickness between 0.1 and ឬ 20 μm, in particular 4-6 μm, is deposited on the entire running surface.
The invention relates to a piston ring of a reciprocating piston internal combustion engine, comprising a ring body with an open abutment, a radially outer running surface side, a radially inner circumferential side, two axially opposite flank sides, an at least partial coating (B) on the running surface side, and a circumferential recess (A) in the lower region of the running surface, said recess ending outside of the abutment region (C). The running surface side has a spherical profile with a pivot point which is arranged at a height h 2 of 55-80% of the axial height h of the piston ring.
The invention relates to a compression piston ring (2) with a running surface region (4), an upper flank (6), a lower flank (8), and an inner circumferential surface (10). The running surface region (4) is provided with a profiled section that comprises convexly spherical portions (12, 14) which are mutually spaced when seen over the axial height of the running surface region (4) and which have an upper and a lower vertex So, Su. A groove (16) with a depth Tn is arranged between the vertices So, Su, wherein both vertices So, Su are arranged below a center M of the piston ring (2) in the axial direction.
The invention relates to a piston ring (2) having at least one ring flank seal (14), said at least one ring flank seal (14) being arranged on a lower ring flank (8) of the piston ring.
F16J 9/26 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C23C 14/02 - Pretreatment of the material to be coated
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
C23C 16/02 - Pretreatment of the material to be coated
09 - Scientific and electric apparatus and instruments
Goods & Services
Sliding elements for machines; Apparatus or engine parts of metal or plastic; Pistons and parts therefor for machines, motors and engines; Piston rings; Shock absorber; All the aforesaid goods included in class 7. Software for monitoring and improving piston rings; Apparatus for monitoring and improving piston rings.
The invention relates to a piston ring 1. Said piston ring 1 comprises an annular main body 2 which is preferably open at a butt joint and has a U-shaped cross section, the open side of which points inwards in the radial direction; an annular spring 4 which runs in the axial direction in a meandering manner and prestresses the main body 2 towards the outside in the radial direction; wherein meander loops 5 bear alternately against the limbs 3 of the U-shaped cross section in a section of the annular spring 4 which lies within the main body; and wherein meander loops 6 bear alternately against the radially inwardly pointing edges of the limbs 3 of the U-shaped cross section in a section of the annular spring 4 which protrudes out of the main body 2.
The present invention relates to an axially stabilized two-part piston ring (2), comprising a main part (4) with a substantially L-shaped cross-section; which has an outer running surface (12) arranged on a running surface leg (8), and a ring flank piece (10), which together form two legs of the L-shaped cross-section. The piston ring (2) further comprises an axial stabilizing element (6) which is arranged so as to at least partially rest against the ring flank piece (10), said stabilizing element (6) being elastic in the axial direction and said stabilizing element (6) projecting over the running surface leg (12).
