A vehicle exhaust component includes an outer shell defining an internal cavity, at least one baffle located within the internal cavity, and at least one tube supported by the baffle. The baffle is fixed to the outer shell and includes at least one opening. The tube has first and second tube ends with one of the first and second tube ends being supported within the opening in the baffle. At least one slot is formed within the one of the first and second tube ends at the at least one opening. The slot facilitates noise reduction during cool down of the vehicle exhaust component.
A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane is positioned at an initial start position and is movable between a closed position to provide a minimum exhaust gas flow and an open position to provide a maximum exhaust gas flow. The start position is orientated at a negative angle relative to the closed position.
A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane is positioned at an initial start position and is movable between a closed position to provide a minimum exhaust gas flow and an open position to provide a maximum exhaust gas flow. The start position is orientated at a negative angle relative to the closed position.
A valve device, in particular for an exhaust system of an internal combustion engine, has a valve flap which is arranged in a tube and can assume a basic position and an actuating position. A motor-driven valve drive that is arranged outside the tube and is coupled to a shaft of the valve flap by a force transmission element. A mechanical restoring element urges the valve flap into the basic position. The valve drive works against the mechanical restoring element as far as to the actuating position. A lever is connected to one end of the force transmission element and when in the actuating position of the valve flap, is in or near the dead-center position with respect to the force transmission direction from or to the force transmission element. In an alternative configuration, the lever is coupled to the shaft of the valve flap and, in the actuating position of the valve flap, is in a position in which the distance between the force transmission direction from or to the force transmission element and the pivot axis of the lever is at least approximately a maximum.
An outer shell of an exhaust component includes an external surface and an internal surface defining an inner cavity. At least a portion of the internal surface has a non-smooth finish, such as a textured surface for example. A substrate assembly is received within the inner cavity and is in contact with the portion of the internal surface that has the textured surface. The contact between the textured surface and an outer surface of the substrate assembly prevents relative movement between the substrate assembly and the outer shell.
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
F01N 13/00 - Exhaust or silencing apparatus characterised by constructional features
6.
METHOD AND APPARATUS FOR OPERATING AN EMISSION ABATEMENT ASSEMBLY
A method of operating an emission abatement system having a selective catalytic reduction (SCR) catalyst includes supplying fuel to a fuel-fired burner positioned upstream of the SCR catalyst to heat exhaust gas being advanced to the SCR catalyst. The method further includes determining a flow rate of fuel being supplied to the burner, and predicting the amount of fuel to be further supplied to the burner based upon the determined fuel flow rate. The method further includes supplying the predicted amount of fuel to the burner.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 3/025 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
7.
APPARATUS FOR DIRECTING EXHAUST FLOW THROUGH A FUEL-FIRED BURNER OF AN EMISSION ABATEMENT ASSEMBLY
An emission abatement assembly includes a fuel-fired burner having a housing and a combustion chamber positioned within the housing. The combustion chamber includes a wall circumscribing a space. The emission abatement assembly further includes an exhaust gas inlet pipe having an elbow at an outlet end positioned within the housing. The elbow is positioned to direct an entire flow of exhaust gas in a direction toward an interior wall of the housing such that the entire flow of exhaust gas exiting the elbow impinges upon the interior wall prior to reaching the wall and space of the combustion chamber.
F01N 3/02 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
F01N 3/18 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl
F02D 43/00 - Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
F02D 45/00 - Electrical control not provided for in groups
8.
METHOD AND APPARATUS FOR CLEANING ELECTRODES OF A FUEL-FIRED BURNER OF AN EMISSION ABATEMENT ASSEMBLY
A method and apparatus for operating a fuel-fired burner of an emission abatement assembly includes detecting a burner shutdown request, and adjusting an air-to-fuel ratio of an air/fuel mixture being supplied to the burner to a ratio greater than a stoichiometric ratio in response to the burner shutdown request. The method further includes advancing an adjusted air/fuel mixture to an electrode assembly of the burner for a predetermined amount of time in response to the burner shutdown request. The burner is shut down after the predetermined amount of time has elapsed.
F01N 3/025 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
F01N 3/00 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
F23D 14/00 - Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
9.
METHOD AND APPARATUS FOR CONTROLLING A FUEL-FIRED BURNER OF AN EMISSION ABATEMENT ASSEMBLY
A method and apparatus for operating a fuel-fired burner of an emission abatement assembly includes advancing exhaust gas from an internal combustion engine to the fuel-fired burner, and determining an amount of useable oxygen present in the exhaust gas. The method further includes adjusting an amount of fuel supplied to the burner based upon the amount of useable oxygen present in the exhaust gas.
F01N 3/02 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
F01N 3/18 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl
F02D 43/00 - Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
F02D 45/00 - Electrical control not provided for in groups
10.
METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER OF AN EMISSION ABATEMENT ASSEMBLY
A method and apparatus for operating an emission abatement assembly includes supplying a first flow rate of fuel to a fuel-fired burner to generate heat to combust soot trapped in a particulate filter. The method further includes supplying a second flow rate of fuel to the burner in an attempt to increase the temperature of the heat, with the second flow rate of fuel being greater than the first flow rate of fuel. The method further includes determining the temperature of the heat, and supplying a third flow rate of fuel to the burner if the temperature of the heat decreases in response to supplying the second flow rate of fuel, with the third flow rate of fuel being less than the second flow rate of fuel.
F01N 3/023 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
F01N 3/18 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl
F02D 43/00 - Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
F02D 45/00 - Electrical control not provided for in groups
A vehicle exhaust system includes various exhaust components. A passive valve assembly is associated with at least one of the exhaust components. The passive valve is spring biased toward a closed position and is movable toward an open position in response to an increase in exhaust pressure that exceeds a biasing force of the spring. One aspect of the invention relates to a location of the passive valve in relation to other exhaust system components. Another aspect of the invention relates to the passive valve in combination with a packed resonator. Another aspect of the invention relates to the passive valve including a stop pad that facilitates noise reduction while also improving valve performance and durability. Another aspect of the invention relates to using the passive valve in a non-bypass configuration with a high percentage of coverage when in a closed position. Another aspect of the invention relates to providing an offset passive valve configuration in the vehicle exhaust system.
An exhaust component includes at least one muffler that has an inlet and an outlet. One pipe body is connected to each of the inlet and the outlet. The pipe bodies each have first and second ends that define a respective overall pipe length. Each pipe body defines a sole exhaust flow path between their first and second ends. A passive valve assembly is mounted outside of the muffler and within one of the pipe bodies. The passive valve assembly is positioned at a location within a first 25% of the overall pipe length of one of the pipe bodies relative to the inlet or outlet of the muffler.
A diesel exhaust system includes a supply of diesel fuel. The system further includes a first reduction path having a diesel fuel-fired burner operated to partially oxidize diesel fuel supplied thereto from the supply of diesel fuel and to introduce at least one of CO and H2 into an exhaust stream. The first reduction path further includes an oxidation catalyst and a first emissions reduction component that is configured to be regenerated by CO and H2 in the exhaust system. An associated method is disclosed.
An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter.
A method includes supplying combustion air to a fuel-fired burner of an emission abatement device from a turbocharger. During periods of low turbo boost pressure, combustion an: is supplied to the fuel-fired burner from an auxiliary source. An associated apparatus is also disclosed.
F02M 25/06 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding lubricant vapours
16.
METHOD AND APPARATUS FOR NON-CATALYTIC NOX REDUCTION
A method of reducing NOx in exhaust gases generated by an internal combustion engine includes advancing the exhaust gases along an exhaust path to a selective catalytic reduction (SCR) catalyst positioned downstream from the internal combustion engine. The method further includes activating a heat source if the exhaust gases are below a predetermined temperature, such that the exhaust gases along a segment of the exhaust path are heated to a temperature of 700-1000°C. The method further includes injecting a reductant into the segment of the exhaust path upstream of the SCR catalyst to react in the segment with NOx in the exhaust gases. The method further includes deactivating the heat source if the temperature of the exhaust gases at the catalyst rises above the first predetermined temperature. An emission abatement assembly is also disclosed.
A method of operating an emission abatement system includes advancing a liquid agent to an atomizing nozzle and advancing pressurized air to the atomizing nozzle. The method further includes impinging the pressurized air on the liquid agent at a tip of the atomizing nozzle to shear liquid agent particles from the liquid agent. The method further includes advancing the liquid agent particles through the atomizing nozzle to an emission abatement device. An emission abatement system and atomizer apparatus are also disclosed herein.
F01N 3/02 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
An exhaust valve includes a valve body (18) that is fixed for rotation with a shaft (20) supported by at least one bushing (30). A single spring (50) is used to bias the shaft to hold the valve body in a valve closed position, and to exert an axial load on the shaft to seal the shaft against the bushing to prevent exhaust gas leakage.
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
An exhaust valve assembly (10) includes a flapper valve (12) fixed to a valve shaft (14) where the flapper valve is movable between a closed position, an intermediate position, and an open position. A resilient member (30) biases the flapper valve toward the closed.position. An electric actuator (22) actively moves the flapper valve at least from the closed position to the intermediate position. A coupling mechanism (18) couples the valve shaft to an electric actuator shaft (20) and allows the flapper valve to move to the open position in response to exhaust flow sufficient to overcome a biasing force of the resilient member without requiring input from the electric actuator.
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
F16K 31/04 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a motor
20.
Passive valve for attenuation of low frequency noise
A passive valve assembly for an exhaust system is mounted within an exhaust tube. The exhaust tube has a bore that defines an exhaust flow path having a cross-sectional area. One end of the exhaust tube is to be connected to a first exhaust component and a second end of the exhaust tube is to be connected to a second exhaust component such that the exhaust tube forms a sole exhaust path between the first and the second exhaust components. The passive valve assembly includes a vane that is mounted within the bore, and which is moveable between an open position and a closed position. A resilient member biases the vane toward the closed position. When the vane is in the closed position, the vane covers 80% to 97% of the cross-sectional area.
F16K 17/04 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side spring-loaded
An exhaust valve includes a valve body that is fixed for rotation with a shaft supported by at least one bushing. A single spring is used to bias the shaft to hold the valve body in a valve closed position, and to exert an axial load on the shaft to seal the shaft against the bushing to prevent exhaust gas leakage.
An exhaust valve assembly includes a flapper valve fixed to a valve shaft where the flapper valve is movable between a closed position, an intermediate position, and an open position. A resilient member biases the flapper valve toward the closed position. An electric actuator actively moves the flapper valve at least from the closed position to the intermediate position. A coupling mechanism couples the valve shaft to an electric actuator shaft and allows the flapper valve to move to the open position in response to exhaust flow sufficient to overcome a biasing force of the resilient member without requiring input from the electric actuator.
An exhaust valve assembly includes a flapper valve fixed to a valve shaft where the flapper valve is movable between a closed position, an intermediate position, and an open position. A resilient member biases the flapper valve toward the closed position. An electric actuator actively moves the flapper valve at least from the closed position to the intermediate position. A coupling mechanism couples the valve shaft to an electric actuator shaft and allows the flapper valve to move to the open position in response to exhaust flow sufficient to overcome a biasing force of the resilient member without requiring input from the electric actuator.
An apparatus (10) for removing particulate soot from an exhaust gas (24) of an internal combustion engine includes a catalyst (14) and a soot particulate filter (12) positioned downstream of the catalyst (14) for trapping soot particles therein. Atomized fuel (38) is injected into the catalyst (14). The catalyst (14) has a non-uniform catalytic loading such that the catalyst has an upstream region (32) having a catalytic loading of a first concentration and a downstream region (34) having a catalytic loading of a second concentration. The first concentration is greater than the first. The catalyst (14) catalyzes an exothermic oxidation reaction between the hydrocarbon fuel and oxygen in the exhaust gas (24). Heat from this exothermic oxidation reaction is transferred to the soot particulate filter (12) thereby igniting the soot particles trapped therein. A method for regenerating a particulate filter assembly (12) having with a catalyst (14).
An exhaust valve assembly includes a valve body, a valve supported by a shaft within the valve body, and an actuator that drives the shaft to move the valve relative to the valve body. A side load feature engages one portion of the shaft to reduce valve chatter by side loading the shaft.
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
patents
