A zirconia sintered body with excellent translucency and hydrothermal degradation resistance is provided. A production method for a zirconia sintered body that is to be disclosed herein includes a process body preparing step of preparing a process body containing zirconia and yttria and/or ytterbia, in which a total proportion of the yttria and the ytterbia is 4 mol % or more and 6 mol % or less when a total of the zirconia, the yttria, and the ytterbia is set to 100 mol %, a first heating step of heating the process body at 800° C. or higher and 1200° C. or lower, a second heating step of heating the process body after the first heating step at 1600° C. or higher and 2000° C. or lower by microwave heating, and a cooling step of decreasing a temperature of the process body after the second heating step to 1300° C. at a rate of 50° C./min or more.
A61K 6/818 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des céramiques comprenant de l’oxyde de zirconium
The present disclosure provides a method for producing a zirconia sintered body having an excellent strength and excellent translucency. A method for producing a zirconia sintered body that has been disclosed herein includes the following steps: a compact preparation step of preparing a compact containing zirconia and yttria and/or ytterbia, in which a proportion of the yttria and/or ytterbia is 3 mol % or more and 4.4 mol % or less when the zirconia and the yttria and/or ytterbia is set to 100 mol %, a first heating step of heating the compact at 800° C. or higher and 1200° C. or lower to obtain a calcined body, and a second heating step of heating the calcined body at 1600° C. or higher and 2000° C. or lower by microwave heating to obtain a zirconia sintered body.
C04B 35/48 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxydes de zirconium ou d'hafnium ou de zirconates ou d'hafnates
The present disclosure provides a technique for obtaining a zirconia sintered body having excellent light transmission properties and water and heat degradation resistance. A method for producing a zirconia sintered body disclosed herein comprises: a molded body preparation step for preparing a molded body which contains zirconia, and yttria and/or ytterbia, and in which the total proportion of yttria and ytterbia is not less than 3 mol% but less than 4 mol% with respect to a total of 100 mol% of zirconia, yttria, and ytterbia; a first heating step for heating the molded body at 800-1200ºC; a second heating step for heating the molded body, which has been subjected to the first heating step, at 1600-2000ºC by microwave heating; and a cooling step for cooling the molded body, which has been subjected to the second heating step, down to 1300ºC at a rate of at least 50ºC/min.
The present invention provides a sintered zirconia object that has a surface, at least some of which has excellent breaking toughness, and that has a reduced degree of thermal expansion. This sintered zirconia object comprises zirconia and a vanadium-group element, wherein the vanadium-group element localizes in at least some of a surface layer. In one embodiment of this sintered zirconia object, the concentration of the vanadium-group element in the surface-layer surface where the vanadium-group element localizes is at least 1.5 times as high as the concentration of the vanadium-group element in a portion that is lowest in the concentration of the vanadium-group element along the depth direction from said surface, or the portion that is lowest in the concentration of the vanadium-group element does not contain the vanadium-group element.
A61K 6/818 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des céramiques comprenant de l’oxyde de zirconium
A61K 6/822 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des céramiques comprenant de l’oxyde de métaux des terres rares
A61K 6/824 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des céramiques comprenant de l’oxyde de métaux de transition
5.
ZIRCONIA SINTERED BODY AND METHOD FOR PRODUCING SAME
The present disclosure provides a zirconia sintered body having excellent translucency and resistance to hydrothermal degradation. The disclosed method for producing a zirconia sintered body includes the following steps: an object-to-be-processed preparation step for preparing an object to be processed that includes zirconia, and yttria and/or ytterbia, the ratio of the yttria and the ytterbia being 4 mol% to 6 mol% when the sum total of the zirconia, the yttria and the ytterbia is taken to be 100 mol%; a first heating step for heating the object to be processed at 800ºC to 1200ºC; a second heating step for heating the object to be processed, which has undergone the first heating step, at 1600ºC to 2000ºC by means of microwave heating; and a cooling step for cooling the object to be processed, which has undergone the second heating step, to 1300ºC at a rate of at least 50ºC/min.
A61K 6/818 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des céramiques comprenant de l’oxyde de zirconium
The present disclosure provides a method for producing a zirconia sintered body that has excellent strength and translucency. This method for producing a zirconia sintered body comprises: a compact preparation step for preparing a compact which includes zirconia, and yttria and/or ytterbia, the ratio of the yttria and/or yttrebia being 3 mol% to 4.4 mol% when the zirconia and the yttria and/or ytterbia are defined as being 100 mol%; a first heating step for heating the compact at 800°C to 1,200°C to obtain a provisionally sintered body; and a second heating step for heating the provisionally sintered body at 1,600°C to 2,000°C by microwave heating to obtain a zirconia sintered body.
Provided is a zirconia sintered body having excellent fracture toughness, exhibiting excellent translucency, and having excellent resistance to hydrothermal degradation. This zirconia sintered body is composed of zirconia containing 3.5-5.0 mol% of yttrium oxide and/or ytterbium oxide as a stabilizer and 0.3-1.5 mol% of niobium oxide and/or tantalum oxide, and formed so as to have a fracture toughness value of at least 4.5 MPa√m, and an opacity of at most 80.0% at a thickness of 1.5 mm.
A wheel loader is provided which can raise a lift arm in a short time during an excavation operation. This wheel loader 1 is provided with an engine 3, a travel drive device 4, a variable capacity hydraulic pump 43 for a work machine, and a front work machine 2, and is provided with a pedal depression amount detector 70, a forward/backward travel switch 124, a pressure detector 73, and a controller 5 which controls the maximum traction force of the wheel loader 1 and the input torque of the work machine hydraulic pump 43. The controller 5 includes a specific condition determination unit 52A which determines whether or not a specific condition for specifying an excavation operation is satisfied, an elapsed time measurement unit 53 which measures the time elapsed from the excavation operation start time, and an input torque control unit 54B. When the specific condition has been satisfied, the input torque control unit 54B limits the input torque to a first input torque value Tp1, and, once a second set time ST2 has elapsed from the elapsing of the first set time ST1, increases the input torque from the first input torque value Tp1.
F16H 59/50 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction de l'état de la machine, p. ex. de la position des portes ou des ceintures de sécurité
F16H 61/02 - Fonctions internes aux unités de commande pour changements de vitesse ou pour mécanismes d'inversion des transmissions transmettant un mouvement rotatif caractérisées par les signaux utilisés
Provided is a wheel loader capable of suppressing a sudden change in vehicle speed associated with an erroneous determination of a lifting operation of a lift arm. This wheel loader 1 comprises: an engine 3; a variable-capacity HST pump 41; a variable-capacity HST motor 42 connected to the HST pump 41 in a closed loop; a work machine hydraulic pump 43; an advance/reverse changeover switch 62 that switches the vehicle body between advance and reverse; a step-in amount detector 610 that detects the step-in amount of an accelerator pedal 61; a pressure detector 73 that detects a discharge pressure Pa of the work machine hydraulic pump 43; and a controller 5. On the basis of an advance/reverse changeover signal, the step-in amount of the accelerator pedal 61, and the discharge pressure Pa detected by the pressure detector 73, the controller 5 determines whether or not a specific condition for identifying an upward movement of a lift arm 21 during advancing travel of the vehicle body is satisfied, and in cases where the specific condition is satisfied, the controller limits the vehicle speed by controlling the displacement volume of the HST motor 42 in accordance with an increase in the discharge pressure Pa.
Provided is a work vehicle in which the clogging of a radiator can be eliminated appropriately, and in which the durability of components, such as a hydraulic pump, constituting a hydraulic circuit can be improved. This work vehicle comprises: an engine 1; a radiator 8 that cools a coolant of the engine 1; a hydraulic pump 2 driven by the engine 1; a cooling fan 4 that blows cooling air to the radiator 8; a hydraulic motor 3 that is driven by pressure oil discharged from the hydraulic pump 2 and that rotates the cooling fan 4; a direction switching valve 5 that makes the hydraulic motor 3 rotate either forward or reversely by switching the flowing direction of the discharged oil from the hydraulic pump 2; and a controller 7 that controls the direction switching valve 5 such that the forward-reverse rotation of the cooling fan 4 is switched repeatedly at every predetermined interval time TS. When a relationship between an outside air temperature TA detected by an outside air temperature sensor 16 and a coolant temperature TW detected by a coolant temperature sensor 17 satisfies a predetermined condition, the controller 7 makes the interval time TS shorter than an initially set normal time.
B60K 11/04 - Disposition ou montage des radiateurs, volets de radiateurs ou écrans de radiateurs
E02F 9/00 - Éléments constitutifs des dragues ou des engins de terrassement, non limités à l'une des catégories couvertes par les groupes
F01P 5/06 - Guidage ou conduite de l'air vers ou depuis les ventilateurs
F01P 7/04 - Commande du débit de l'agent de refroidissement l'agent de refroidissement étant de "l'air de refroidissement" en faisant varier la vitesse de la pompe, p. ex. en changeant le rapport de son entraînement
F01P 11/14 - Dispositifs indicateursAutres dispositifs de sécurité
F01P 11/16 - Dispositifs indicateursAutres dispositifs de sécurité concernant la température de l'agent de refroidissement
Provided is a wheel loader capable of suppressing a sudden change in vehicle speed associated with an erroneous determination of a lifting operation of a lift arm. This wheel loader 1 comprises: an engine 3; a variable-capacity HST pump 41; a variable-capacity HST motor 42 connected to the HST pump 41 in a closed loop; an advance/reverse changeover switch 62 that switches the vehicle body between advance and reverse; a step-in amount detector 610 that detects the step-in amount of an accelerator pedal 61; an operation amount detector 73 that detects a lifting operation amount of a lift arm 21; and a controller 5. On the basis of an advance/reverse changeover signal, the step-in amount of the accelerator pedal 61, and a pilot pressure Ti related to the lifting operation of the lift arm 21, the controller 5 determines whether or not a specific condition for identifying an upward movement of the lift arm 21 during advancing travel of the vehicle body is satisfied, and in cases where the specific condition is satisfied, the controller limits the vehicle speed by controlling the displacement volume of the HST motor 42 in accordance with an increase in the pilot pressure Ti.
G01G 19/16 - Appareils ou méthodes de pesée adaptés à des fins particulières non prévues dans les groupes pour peser des charges suspendues ayant des dispositifs à fluide sensibles au poids
E02F 3/34 - DraguesEngins de terrassement entraînés mécaniquement avec des outils excavateurs montés sur un bras plongeur ou à godets, p. ex. plongeurs, godets avec bras-plongeurs pivotant sur le bâti du tracteur ou de l'engin automoteur
G01G 19/10 - Appareils ou méthodes de pesée adaptés à des fins particulières non prévues dans les groupes pour incorporation dans des véhicules ayant des dispositifs à fluide sensibles au poids
Provided is a wheel loader capable of suppressing fuel consumption by shortening the travel distance necessary for a raising/running operation. This wheel loader 1 comprises: an engine 3; a torque converter 41; an advance/reverse changeover switch 62 that switches the vehicle body between advance and reverse; a step-in amount detector 610 that detects the step-in amount of an accelerator pedal 61; an operation amount detector 73 that detects a lifting operation amount of a lift arm 21; and a controller 5. On the basis of an advance/reverse changeover signal, the step-in amount of the accelerator pedal 61, and a pilot pressure Ti related to the lifting operation of the lift arm 21, the controller 5 determines whether or not a specific condition for identifying an upward movement of the lift arm 21 during advancing travel of the vehicle body is satisfied, and in cases where the specific condition is satisfied, the controller limits the vehicle speed by reducing the maximum rotation speed of the engine 3 in accordance with an increase in the pilot pressure Ti.
Provided is a hydraulic drive device for a working vehicle, the hydraulic drive device being configured to reduce impact on an operator who operates an actuator. This hydraulic drive device for a working vehicle comprises: a variable displacement or fixed displacement main pump (1) for discharging pressurized oil; a main flow passage (F1) for supplying to an actuator the pressurized oil discharged from the main pump; a fixed displacement sub-pump (5) for discharging pressurized oil; a sub-flow passage (F2) for causing the pressurized oil discharged from the sub-pump to flow into the main flow passage and supplying the oil to an actuator (2); a flow combining switching valve (6A) for connecting or disconnecting the main flow passage and the sub-flow passage; a controller (30) for controlling the operation of the flow combining switching valve; and a relief valve (7A) provided in the sub-flow passage. The relief valve has pressure override characteristics which tend to cause a relief pressure to increase from a cracking pressure to a set pressure as a relief flow rate increases.
F15B 11/02 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie
E02F 9/22 - Entraînements hydrauliques ou pneumatiques
F15B 11/028 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie pour régler la puissance
This work vehicle is provided with: an engine; a work device; a hydraulic cylinder that drives the work device; a main hydraulic pump that is driven by the engine so as to supply pressure oil to the hydraulic cylinder; an operation device that operates the hydraulic cylinder; an accessory pump that is driven by the engine so as to supply pressure oil to an auxiliary device; and a confluence switching valve that merges pressure oil from the accessory pump with pressure oil from the main hydraulic pump. The work vehicle is provided with a control device that, when the atmospheric pressure or the air density of the outside air is lower than a predetermined value, executes confluence restriction control by decreasing the confluence flow amount at the confluence switching valve to an amount smaller than that when the atmospheric pressure or the air density is higher than the said value, and that cancels the confluence restriction control when the rotation speed of the engine becomes higher than a predetermined rotation speed value during the confluence restriction control. The rotation speed value is greater as the atmospheric pressure or the air density of the outside air is lower.
F15B 11/02 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie
E02F 9/22 - Entraînements hydrauliques ou pneumatiques
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 45/00 - Commande électrique non prévue dans les groupes
The purpose of the invention is to prevent a work machine load from being excessive and to improve the working efficiency of excavation. Provided is a work vehicle comprising a work machine having an arm and a bucket, a vehicle speed detection device that detects the vehicle speed, a travel drive device that outputs a travel drive force that increases in response to a decrease in the vehicle speed during excavation, and a control device that controls the travel drive force by way of the travel drive device, wherein the work vehicle is characterized in that the control device has a limiting control unit that limits the travel drive force during a prescribed time from when the vehicle speed detected by the vehicle speed detection device drops to or below a predetermined first vehicle speed threshold and the vehicle enters the excavation site to when the work machine begins operations.
The purpose of the present invention is to suppress lug down that occurs during a forward/backward movement switching operation or excavation work, and to enable the movement of a work vehicle to be made smoother. Provided is a work vehicle comprising a work device that is operated by hydraulic oil ejected from a main pump, an operation device that operates the work device, auxiliary equipment that is operated by hydraulic oil from an accessory pump, a priority valve that can be switched between a normal position at which the hydraulic oil from the accessory pump is guided to the accessory equipment and a confluence position at which the hydraulic oil from the accessory pump is guided to the operation device, and a forward/backward movement operation device, wherein: the priority valve is maintained in the normal position when either the forward movement direction or backward movement direction indicated by the forward/backward movement operation device and the movement direction of the work vehicle do not match; and the priority valve is switched to the confluence position when either the forward movement direction or backward movement direction indicated by the forward/backward movement operation device and the movement direction of the work vehicle do match and the operation device is being operated.
The present invention suppresses increase in the temperature of a reducing agent in a reducing agent supply pipe. This working machine is provided with an exhaust gas purifying apparatus that includes: a selective catalytic reduction device that processes exhaust gas in an engine; and a reducing agent jetting device that jets a reducing agent into exhaust gas supplied to the selective catalytic reduction device. The working machine is provided with a housing that delimits an engine chamber storing therein the engine and the exhaust gas purifying apparatus, wherein: the housing includes a top plate that covers, above the engine, the engine chamber, and an air-discharging duct that is provided to the top plate and that discharges the air in the engine chamber to the outside of the engine chamber; and a part of a reducing agent supply pipe, through which the reducing agent is introduced to the reducing agent jetting device, is disposed, in the air-discharging duct, at a position above the reducing agent jetting device.
F01N 3/08 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs
B01D 53/94 - Épuration chimique ou biologique des gaz résiduaires des gaz d'échappement des moteurs à combustion par des procédés catalytiques
B60K 11/06 - Dispositions des ensembles de propulsion relatives au refroidissement avec refroidissement par air
E02F 9/00 - Éléments constitutifs des dragues ou des engins de terrassement, non limités à l'une des catégories couvertes par les groupes
F01N 3/24 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs par conversion thermique ou catalytique des composants nocifs des gaz d'échappement caractérisés par les aspects de structure de l'appareillage de conversion
F01P 3/20 - Circuits de refroidissement non spécifiques d'une pièce particulière des moteurs ou "machines"
The present invention enables a high static transmission (HST) vehicle to move in a state in which engine speed is restricted. The present invention is a work vehicle provided with: an engine; a hydraulic pump driven by the engine; a hydraulic motor that is driven by pressurized oil discharged from the hydraulic pump and that drives wheels; an HST circuit in which the hydraulic pump and the hydraulic motor are connected in a closed circuit; a reducing agent sensor for detecting the state of a reducing agent used for exhaust purification of the engine; and an engine restriction unit for restricting the engine speed on the basis of the output of the reducing agent sensor. The work vehicle is characterized by being provided with a control unit that, when it is determined that the engine speed has been restricted by the engine restriction unit, changes the tilt angle of the hydraulic pump or hydraulic motor independently of the engine speed to a tilt angle associated with the minimum traveling driving force required for the work vehicle to run freely.
B60W 10/30 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande d'équipements auxiliaires, p. ex. des compresseurs pour la climatisation ou des pompes à huile
B60K 17/10 - Agencement ou montage des transmissions sur les véhicules caractérisées par la disposition, l'emplacement ou le type de mécanisme de transmission à fluide
B60W 10/04 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion
B60W 10/06 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion comprenant la commande des moteurs à combustion
B60W 10/103 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des boîtes de vitesses transmissions à variation continue du rapport de type fluidique
F01N 3/08 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes
Lug-down occurring when a work device is operated is suppressed when performing an operation to switch between forward and backward movement. A work vehicle provided with a work device and a travel drive device for transmitting drive force of an engine to a wheel via a transmission device that includes a mechanical transmission unit, wherein the work vehicle is provided with: a clutch device having a clutch for forward movement and a clutch for backward movement, for causing the work vehicle to travel in a forward direction and a backward direction when engaged; a forward/backward instruction device for issuing an instruction for the work vehicle to travel in a forward direction or a backward direction; a clutch state detection device for detecting whether the clutch for forward movement or the clutch for backward movement is engaged; and a torque-limiting unit for limiting the maximum absorption torque of a hydraulic pump at a low level when a limit condition occurs in which the advancing direction of the work vehicle corresponding to the engagement state of the clutch device, and the advancing direction of the work vehicle instructed by the forward/backward instruction device, are opposite directions.
F16H 61/433 - Commande du débit de la pompe par des moyens de commande par pression de fluide
B60K 20/00 - Agencement ou montage sur les véhicules des dispositifs de commande des boîtes de changement de vitesses
E02F 9/22 - Entraînements hydrauliques ou pneumatiques
F02D 29/02 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des véhiculesCommande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des hélices à pas réglable
F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes
F16H 61/478 - Régulation automatique selon les variables de commande pour empêcher la surcharge, p. ex. limitation des hautes pressions
A converter is provided with a first electrode, a second electrode, a dielectric elastomer film, and a high-dielectric-constant film. The dielectric elastomer film is disposed between the first electrode and the second electrode, and has a relative permittivity ε1. The high-dielectric-constant film is disposed between the first electrode and the dielectric elastomer film and/or between the second electrode and the dielectric elastomer film, and has a relative permittivity ε2 that is higher than the relative permittivity ε1.
The purpose of the invention is to suppress an increase in temperature of a control device for a supercharger and to increase the life of the control device for the supercharger. This work machine is a work machine comprising a variable-capacity supercharger in which the boost pressure is changeable, and a work device. The work machine comprises: a variable-capacity working hydraulic pump that is driven by an engine, and that supplies pressure oil to an actuator which drives the work device; a supercharger control device that controls the supercharger; a temperature detection device that detects the temperature of the supercharger control device; and a main control device that limits the maximum absorption torque of the working hydraulic pump when the temperature of the supercharger control device is higher than a first temperature compared to when the temperature is lower than the first temperature.
E02F 9/22 - Entraînements hydrauliques ou pneumatiques
F01P 7/04 - Commande du débit de l'agent de refroidissement l'agent de refroidissement étant de "l'air de refroidissement" en faisant varier la vitesse de la pompe, p. ex. en changeant le rapport de son entraînement
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes
The purpose of the invention is to suppress an increase in temperature of a control device for a supercharger and to increase the life of the control device for the supercharger. This work vehicle is a work vehicle comprising a variable-capacity supercharger in which the boost pressure is changeable, and a work device that is driven by pressure oil discharged from a working hydraulic pump. The work vehicle comprises: a supercharger control device that controls the supercharger; a temperature detection device that detects the temperature of the supercharger control device; and a main control device that limits the maximum rotation speed of an engine and/or the maximum vehicle speed of the work vehicle when the temperature of the supercharger control device is higher than a predetermined temperature compared to when the temperature is lower than the predetermined temperature.
F02D 29/02 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des véhiculesCommande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des hélices à pas réglable
F02B 39/00 - Parties constitutives, détails ou accessoires non couverts par les groupes , et relatifs aux pompes d'alimentation ou de balayage entraînées
F02B 39/16 - Autres mesures de sécurité pour les pompes ou autres commandes de celles-ci
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 45/00 - Commande électrique non prévue dans les groupes
F16H 61/18 - Fonctions internes aux unités de commande pour changements de vitesse ou pour mécanismes d'inversion des transmissions transmettant un mouvement rotatif empêchant le changement involontaire ou dangereux
F16H 63/50 - Sorties de commande vers les transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion délivrant des signaux autres que les signaux pour manœuvrer les mécanismes finals de sortie des signaux vers le moteur
A left operation device (31) installed on the left side of the driver’s seat (15) of a wheel loader (1) is provided with: a support member (32); an operation implement stand (39) that is provided on the support member (32) and is capable of turning between an operation position and a flip-up position; and an operation implement (53) for operating the wheel loader (1), the operation tool (53) being provided at the front end side of the operation implement stand (39). The operation implement stand (39) includes: a turning member (40) attached so as to be capable of turning about a support pin (33) provided on the support member (32) as a turning fulcrum; and a cam roller (50) provided so as to be capable of rotating on the turning member (40), the cam roller (50) turning together with the turning member (40). The dimension (B) from the turning center (O) of the turning member (40) to an operation position contact part (60A1) with which the cam roller (50) makes contact is formed smaller than the dimension (C) from the turning center (O) of the turning member (40) to a flip-up position contact part (60B1) that the cam roller (50) contacts.
A construction machine provided with an engine for driving at least one hydraulic pump that supplies hydraulic oil to a hydraulic actuator, an exhaust adjustment mechanism for adjusting the rate at which exhaust flows from the engine, and a control device for controlling the exhaust adjustment mechanism, wherein the construction machine is characterized in that the control device determines whether a first slope-descending condition and/or a second slope-descending condition are/is satisfied, and when the first slope-descending condition and/or the second slope-descending condition are/is satisfied, the control device controls the exhaust adjustment mechanism so as to effect an exhaust brake.
F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes
B60W 10/02 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande d'accouplements de la chaîne cinématique
B60W 10/04 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion
B60W 10/06 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion comprenant la commande des moteurs à combustion
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 45/00 - Commande électrique non prévue dans les groupes
F16H 59/66 - État de la route, p. ex. pente, mauvaise adhérence
F16H 61/14 - Commande des embrayages de blocage du convertisseur de couple
The present invention is provided with: a work machine (150) driven by a plurality of actuators; a work machine lever (222) for controlling operation of the plurality of actuators; a hydraulic pump (171) and a hydraulic motor (172) which convert motive power outputted by an engine (201) to hydraulic pressure and transmit the same to wheels (1); and a control device (240) configured so as to control the rotation speed of the engine in a range at or below a standard limit value according to an output request command to the engine. The control device (240) performs a limiting process to limit the rotation speed of the engine to a value lower than the standard limit value if the actual traveling speed of a wheel loader has exceeded a traveling speed threshold which is established according to a cargo amount.
F02D 29/02 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des véhiculesCommande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des hélices à pas réglable
B60K 6/46 - Agencement ou montage de plusieurs moteurs primaires différents pour une propulsion réciproque ou commune, p. ex. systèmes de propulsion hybrides comportant des moteurs électriques et des moteurs à combustion interne les moteurs primaires étant constitués de moteurs électriques et de moteurs à combustion interne, p. ex. des VEH caractérisés par l'architecture du véhicule électrique hybride du type série
B60W 10/06 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion comprenant la commande des moteurs à combustion
B60W 20/00 - Systèmes de commande spécialement adaptés aux véhicules hybrides
E02F 9/22 - Entraînements hydrauliques ou pneumatiques
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes
F02D 29/06 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des groupes électrogènes
28.
STEP UNIT FOR INDUSTRIAL VEHICLE AND INDUSTRIAL VEHICLE
This step unit for an industrial vehicle has: an upper tread plate affixed to a side surface of the industrial vehicle; a pivot mechanism provided to the rear of the upper tread plate; an elastic front suspension member extending downward from the front portion of the upper tread plate; an elastic rear suspension member extending downward from the pivot mechanism; a lower tread plate held by the front suspension member and the rear suspension member. The upper portion of the front suspension member is affixed to the front portion of the upper tread plate so as to be incapable of pivoting. The lower portion of the front suspension member is affixed to the front portion of the lower tread plate so as to be incapable of pivoting. The lower portion of the rear suspension member is affixed to the rear portion of the lower tread plate so as to be incapable of pivoting. The upper portion of the rear suspension member is connected through the pivot mechanism to the rear portion of the upper tread plate so as to be capable of pivoting about an axis extending in the widthwise direction of the vehicle.
Provided is a hybrid working vehicle in which the operating efficiency is high even if the output power of a hybrid system for the power required for the vehicle is limited by the output limitation of an electricity storage device, or the like. The hybrid working vehicle is equipped with: a travel unit which has a traveling motor (9); a hydraulic working unit which has a hydraulic pump (4); and a control device (20) which has an operation determination unit (30) and a power calculation unit (31). The operation determination unit (30) receives the manipulated variable of an operating lever device, the amount of depression of an accelerator pedal and a brake pedal, and vehicle speed, and determines the current operating state of the vehicle. The power calculation unit (31) receives the output value of an engine (1) and the output value of an electricity storage device (11), and calculates and controls the power of the travel unit and the power of the hydraulic working unit. When the operation determination unit (30) determines that the current operating state of the vehicle is excavation work, which is the combination operation of the travel unit and the hydraulic working unit, the power calculation unit (31) calculates and controls the output (Prun) of the travel unit and the output (Pf) of the hydraulic working unit so that the sum of the output value (Pe) of the engine (1) and the output value (Pc) of the electricity storage device (11) becomes a preset distribution ratio.
B60W 20/00 - Systèmes de commande spécialement adaptés aux véhicules hybrides
B60K 6/46 - Agencement ou montage de plusieurs moteurs primaires différents pour une propulsion réciproque ou commune, p. ex. systèmes de propulsion hybrides comportant des moteurs électriques et des moteurs à combustion interne les moteurs primaires étant constitués de moteurs électriques et de moteurs à combustion interne, p. ex. des VEH caractérisés par l'architecture du véhicule électrique hybride du type série
B60L 11/14 - avec possibilité de propulsion mécanique directe
B60L 11/18 - utilisant de l'énergie fournie par des piles primaires, des piles secondaires ou des piles à combustibles
B60W 10/08 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande des ensembles de propulsion comprenant la commande des unités de traction électrique, p. ex. des moteurs ou des générateurs
B60W 10/30 - Commande conjuguée de sous-ensembles de véhicule, de fonction ou de type différents comprenant la commande d'équipements auxiliaires, p. ex. des compresseurs pour la climatisation ou des pompes à huile
A cooling structure for a working machine such as a wheeled loader, the cooling structure cooling the engine of the working machine, is provided with: a cover (for example a rear cover) forming a part of the outer surface of the vehicle body of the working machine and having a large number of air passage openings; a radiator disposed on the vehicle body so as to face the cover; and a cooling fan disposed between the cover and the radiator and located close to the cover at a distance therefrom which corresponds to the dimensions of the air passage openings, the cooling fan being provided so as not to be capable of pivoting relative to the vehicle body.
A construction machine is provided with: a cover which covers an engine and a radiator; a radiator fan which is provided at the rear of the vehicle body frame and which discharges exhaust gas toward the rear of the vehicle body frame from the inner space of the cover; an injection device which injects a reducing agent into exhaust gas discharged from the engine; a tank housing section which is provided at one side of the vehicle body frame, is provided with an introduction section for introducing outside air, and houses a tank for storing the reducing agent injected by the injection device; and a connection section which is provided to either the cover or the vehicle body frame and to the tank housing section, connects the inner space of the tank housing section and the inner space of the cover, and allows a pipe to pass therethrough, the pipe supplying a reducing agent and outside air to the injection device, the outside air having been introduced from the introduction section by the suction pressure of the fan.
F01N 3/08 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs
According to the present invention, the exhaust device of an operation machine is provided with a first exhaust device, a second exhaust device, and a third exhaust device. The first and third exhaust devices are disposed in parallel, with one end of each of the devices directed in the same direction. The second exhaust device is disposed in parallel to the first and third exhaust devices between the first and third exhaust devices in a plan view, with the other end of the second exhaust device directed in the same direction as are the one ends of the first and third exhaust devices, and is disposed upward of the first and third exhaust devices in a side view.
This prime mover control device of a work vehicle having a torque converter is provided with a speed ratio calculation unit which calculates the speed ratio between the input shaft and the output shaft of the torque converter, and a rotational speed limiting unit which, when the speed ratio is within a preset speed ratio range, limits the maximum rotational speed of the prime mover to be lower than the maximum rotational speed in the case that the speed ratio is outside of the preset speed ratio range, wherein, if a prescribed time has elapsed in the state in which the speed ratio calculated by the speed ratio calculation unit is within the preset speed ratio range, then the rotational speed limiting unit changes the maximum rotational speed of the prime mover to a maximum rotational speed which is higher than the maximum rotational speed that was limited to a lower value by the rotational speed limiting unit.
F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
F16H 59/18 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction du couple ou du couple demandé fonction de la position de la pédale d'accélérateur
F16H 59/44 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction d'une vitesse fonction de la vitesse de la machine
F16H 59/46 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction d'une vitesse fonction de la comparaison de vitesses
F16H 59/70 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction de l'état de la transmission fonction du rapport établi
F16H 59/74 - Entrées de commande vers des transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion les entrées étant fonction des paramètres du moteur
F16H 61/00 - Fonctions internes aux unités de commande pour changements de vitesse ou pour mécanismes d'inversion des transmissions transmettant un mouvement rotatif
F16H 63/50 - Sorties de commande vers les transmissions transmettant un mouvement rotatif pour changements de vitesse ou pour mécanismes d'inversion délivrant des signaux autres que les signaux pour manœuvrer les mécanismes finals de sortie des signaux vers le moteur
An industrial vehicle is provided with: an exhaust gas processing device disposed above an engine in an engine room; a urea water tank for storing urea water, the urea water tank being disposed outside the engine room; and a urea water pipe for guiding the urea water from the urea water tank to a urea water injection device, the urea water pipe penetrating a partition wall. The exhaust gas processing device includes a pretreatment unit for storing a diesel oxidation catalyst, the pretreatment unit extending in forward and backward directions, a selective catalytic reduction unit extending in the forward and backward directions next to the pretreatment unit, a connection pipe having a mixing portion extending in the forward and backward directions between the pretreatment unit and the selective catalytic reduction unit, a first bent portion connecting the mixing portion and an outflow port located on the partition wall side in the pretreatment unit, and a second bent portion connecting the mixing portion and an inflow port located on the opposite side of the partition wall in the selective catalytic reduction unit, and the urea water injection device for injecting the urea water into exhaust gas, the urea water injection device being attached to the first bent portion of the connection pipe so as to be positioned on an extending line of the mixing portion.
F01N 3/08 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour rendre les gaz d'échappement inoffensifs
B60K 13/04 - Dispositions des ensembles de propulsion relatives à l'admission d'air de combustion ou à l'échappement des gaz relatives à l'échappement
A working vehicle is provided with: a lift arm linked to a front part of a vehicle body of the working vehicle so as to be capable of turning vertically; an operation lever that can be operated between a raising operation end position and a lowering operation end position, the operation lever operating the raising and the lowering of the lift arm; a raising detent mechanism having a holding function for holding, at the raising operation end position, the operation lever having been operated to the raising operation end position; and a lowering detent mechanism having a holding function for holding, at the lowering operation end position, the operation lever having been operated to the lowering operation end position. When the angle of the lift arm exceeds a predetermined upper limit, the holding function of the raising detent mechanism and the holding function of the lowering detent mechanism are disabled.
This hybrid work machine comprises: an engine that drives a hydraulic pump that is a pressurized oil source for a hydraulic actuator; an electric motor generator for assisting the engine and that is attached to the engine; an electric motor used in a portion of the drive system of the work machine; an electrical storage device that stores the electrical power generated by the electric motor generator; a power conversion device that is provided between the electric motor and a DC bus; and a buck-boost converter that is provided between the DC bus and the electrical storage device and transfers electrical power between the DC bus and the electrical storage device by increasing or decreasing the voltage of the DC bus. The hybrid work machine is provided with a controlling device that increases the DC bus voltage temporarily when the torque demand of the electric motor exceeds the torque that can be output with the voltage of the DC bus connected to the power conversion device.
B60L 11/12 - avec alimentation supplémentaire d'énergie électrique, p.ex. par accumulateur
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
brevets
