Abstract: An after-treatment (AT) system for a flow of exhaust gas of an internal combustion engine includes a first AT device and a second AT device in fluid communication with and positioned in the exhaust gas flow downstream of the first AT device. The AT system also includes an exhaust passage configured to carry the exhaust gas flow from the first AT device to the second AT device. The AT system additionally includes an injector configured to introduce a reductant into the exhaust passage. The second AT device includes an inlet cone having a volute defining a spiral primary path for the exhaust gas flow into the second AT device and configured to generate a swirling motion of and turbulence in the exhaust gas flow. A vehicle employing the AT system is also disclosed.

Abstract: An exhaust gas treatment system to treat exhaust gas includes a particulate filter, a second temperature sensor and a control module. The particulate filter includes a PF substrate configured to trap particulate matter contained in the exhaust gas. The second temperature sensor is configured to output an outlet temperature signal indicating an outlet temperature at the outlet of the particulate filter. The control module is in electrical communication with the second temperature sensor to receive the outlet temperature signal. The control module determines a maximum substrate temperature of the PF substrate based on the outlet temperature. The control module is further configured to determine whether the particulate filter includes an active washcoat disposed thereon based on the maximum substrate temperature.

Abstract: A snorkel assembly for reading optimization of a sensor, wherein the snorkel assembly may be configured to be positioned around and spaced apart from the sensor. The snorkel assembly may include an upstream side and a downstream side. The snorkel assembly may include a cup section and a tube section extending from the cup section. The tube section may include an inlet opening on the upstream side of the snorkel assembly. The cup section may include an exhaust opening on the downstream side of the snorkel assembly.

Abstract: A direct fuel injection internal combustion engine fluidly coupled to an exhaust aftertreatment system is described and includes a plurality of fluidly coupled exhaust purifying devices and an exhaust gas sensor. A method of controlling the engine includes, activating, via a heater controller, a heating element of the exhaust gas sensor in response to starting the internal combustion engine. An exhaust gas feedstream is monitored to determine a temperature of the exhaust gas sensor. Engine control to effect heating of one of the exhaust purifying devices is permitted only when a temperature of the exhaust gas sensor is greater than a threshold temperature.

Abstract: A mixer for an exhaust gas treatment system includes a support body that defines a mixing chamber. A plurality of first blades is arranged in a row, and is disposed along a transverse axis. Each of the first blades extends from an upstream edge, toward a first lateral edge surface of the mixing chamber, to a downstream edge, at a first row angle relative to the transverse axis. A plurality of second blades is arranged in a row, and is disposed along the transverse axis. Each of the second blades extends from an upstream edge, toward a second lateral edge surface of the mixing chamber, to a downstream edge, at a second row angle relative to the transverse axis. The first row angle is less than the second row angle. The row of the first blades is axially spaced from the row of the second blades.

Abstract: A SCR device includes a substrate having a first portion, and a second portion disposed downstream of the first portion. The first portion of the substrate includes a volume that is between 15% and 25% of a total volume of the substrate. A first selective catalytic reduction compound is disposed on the first portion of the substrate, and includes an iron zeolite (Fe-Zeolite) compound. A second selective catalytic reduction compound is disposed on the second portion of the substrate, and includes a copper (Cu) SAPO-34 compound. The copper SAPO-34 compound includes a catalyst density of less than 2.74 mg copper per cubic centimeter of copper SAPO-34 compound. The copper SAPO-34 compound is applied onto the second portion of the substrate at a compound density of less than 110 g of copper SAPO-34 compound per liter of volume of the second portion of the substrate.

Abstract: A method for estimating the amount of soot accumulated in a particulate filter of a vehicle exhaust gas system is provided. The system may include an engine, an exhaust gas system, having a particulate filter, and a controller configured to execute the present method. The controller may be configured to evaluate an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system; monitor an exhaust gas pressure drop across the particulate filter; determine a drive state of the vehicle based on the instantaneous volumetric flow rate of exhaust gas and the exhaust gas pressure drop; and execute one of a first control action when the drive state is a steady-state drive state and a second control action when the drive state is a transient-state drive state.

Abstract: An exhaust system is provided for a diesel engine, including an exhaust passage adapted to be attached to the diesel engine. A diesel oxidation catalyst is provided in the exhaust passage along with a selective catalyst reduction device disposed downstream from the diesel oxidation catalyst. A diesel exhaust fluid mixing system includes a diesel exhaust fluid injection nozzle and a mixing device defining a single inlet opening and a single outlet opening connected to one another by a partial spiral flow passage. The diesel exhaust fluid injection nozzle injects diesel exhaust fluid directly into the inlet opening of the partial spiral flow passage.

Abstract: A mixer for an exhaust gas treatment system includes a support body that defines a mixing chamber. A plurality of first blades is arranged in a row, and is disposed along a transverse axis. Each of the first blades extends from an upstream edge, toward a first lateral edge surface of the mixing chamber, to a downstream edge, at a first row angle relative to the transverse axis. A plurality of second blades is arranged in a row, and is disposed along the transverse axis. Each of the second blades extends from an upstream edge, toward a second lateral edge surface of the mixing chamber, to a downstream edge, at a second row angle relative to the transverse axis. The first row angle is less than the second row angle. The row of the first blades is axially spaced from the row of the second blades.

Abstract: A change-gear transmission having an input shaft, a main shaft having at least one main shaft gear, a plurality of countershafts spanning between the input shaft and main shaft gear, and gear synchronizers between selectable gears. The bore of main shaft gears have a minimal radial clearance fit with its mating parts to prevent gear synchronizer wear, while the meshing between the input shaft gears and countershaft gears is equally distributed using a means to equalize the torque transfer between countershafts. The countershafts are rotatably supported and displace axially between bearing or bushing supports, while the meshed gears comprise a helical gear tooth arrangement to create axial load on the countershaft if excessive and uneven load is sensed in one countershaft over another. This presents a new and unique countershaft meshing design that allows multiple countershafts to achieve equal load sharing while permitting gear synchronizers use on the main shaft.

Abstract: In one aspect, a swirl can mixer assembly for mixing a fluid with exhaust gas exhausted from an internal combustion engine is provided. The assembly includes an inlet portion including an injection area configured to receive a fluid injector for dispensing the fluid into the exhaust gas for mixing with the exhaust gas in the mixing assembly to produce an exhaust gas/fluid mixture, an outlet portion, and an extended mixing conduit fluidly coupled between the inlet portion and the outlet portion. The extended mixing conduit is curved about at least a portion of a circumference of the outlet portion to induce a swirl in the exhaust gas/fluid mixture such that the exhaust gas/fluid mixture enters the outlet portion tangentially thereto.

Abstract: A transmission includes a main shaft, a first input shaft, a second input shaft, and a first clutch to drivingly couple the main shaft and the first input shaft. A second clutch drivingly couples the main shaft and the second input shaft. A torque converter is selectively driven by one of the first input shaft and a first speed gear set. The first speed gear set is driven by the other of the first input shaft and the torque converter. A second speed gear set is driven by the second input shaft.

Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.

Abstract: A method is disclosed of providing a fuel efficient regeneration of an exhaust after-treatment (AT) system that includes a lean oxides of nitrogen (NOX) trap (LNT) and a selective catalytic reduction filter (SCRF) positioned downstream of the LNT. The method includes regulating a selectable position valve. The valve permits a first gas flow portion to pass through the LNT and diverts a remaining second portion of exhaust gas flow from a first passage connecting an engine and the AT system to a second exhaust passage to thereby bypass the LNT. The method also includes regulating a first device to inject fuel into the first portion of the exhaust gas flow. The injection of fuel in to the first portion of the exhaust gas flow provides fuel efficient regeneration of the LNT and promotes NOX conversion and ammonia (NH3) formation in the LNT. A system employing the method is also disclosed.

Abstract: A one-way clutch assembly includes an inner race adapted to be fixed for rotation with a first rotatable member, an outer race having circumferentially spaced apart cam surfaces and being adapted to be fixed for rotation with a second rotatable member as well as a plurality of roller elements positioned therebetween. A plurality of circumferentially extending springs cooperate with the cage to align each roller element with the cam surfaces. The springs and cage urge the roller elements away from the inner race. A retaining mechanism captures lubricant in contact with the roller elements.

Abstract: A method for estimating the amount of soot accumulated in a particulate filter of a vehicle exhaust gas system is provided. The system may include an engine, an exhaust gas system, having a particulate filter, and a controller configured to execute the present method. The controller may be configured to evaluate an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system; monitor an exhaust gas pressure drop across the particulate filter; determine a drive state of the vehicle based on the instantaneous volumetric flow rate of exhaust gas and the exhaust gas pressure drop; and execute one of a first control action when the drive state is a steady-state drive state and a second control action when the drive state is a transient-state drive state.

Abstract: A clutch assembly includes an inner race, an outer race and a plurality of roller elements positioned radially therebetween. The clutch assembly also includes a cage assembly, a seal and a retaining ring. The cage assembly includes a skeleton coupled to a spring ring having a plurality of radially extending guides arranged to circumferentially space apart each roller element in alignment with cam surfaces formed on the outer race. The guides are resiliently deformable to allow concurrent engagement of each roller element with both the inner and outer races. The seal engages an inner surface of the outer race and an outer surface of the inner race, and is positioned axially outboard of the roller elements. The retaining ring is positioned within ring grooves formed on each of the inner and outer races to restrict movement of the cage.

Abstract: In one exemplary embodiment of the invention, a method for controlling regeneration for an exhaust system including a particulate filter is provided, where the method includes determining a mass flow rate of oxygen, determining a particulate mass, providing information describing desired set point temperatures corresponding to oxygen mass flow rates and particulate mass values and determining a temperature set point for exhaust gas entering the particulate filter based on the mass flow rate of oxygen, the particulate mass and the information describing desired set point temperatures corresponding to oxygen mass flow rates and particulate mass values. The method further includes communicating a signal to control a parameter for at least one selected from the group consisting of: a hydrocarbon injector, a heating device and a fuel injector configured to provide hydrocarbon post-injection to a cylinder of the internal combustion engine, the controlling based on the determined temperature set point.

Abstract: A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system.

Abstract: An exhaust gas treatment system to treat exhaust gas includes a particulate filter, a second temperature sensor and a control module. The particulate filter includes a PF substrate configured to trap particulate matter contained in the exhaust gas. The second temperature sensor is configured to output an outlet temperature signal indicating an outlet temperature at the outlet of the particulate filter. The control module is in electrical communication with the second temperature sensor to receive the outlet temperature signal. The control module determines a maximum substrate temperature of the PF substrate based on the outlet temperature. The control module is further configured to determine whether the particulate filter includes an active washcoat disposed thereon based on the maximum substrate temperature.