Abstract: A series hybrid transmission includes a first motor device for driving a first shaft, a second motor device for driving a second shaft. Drive gears on the first and second shafts can be simultaneously engaged in the same or different gears and torque from the two motor devices can he multiplied. When shifting up or down, the drive gear on one of the shafts can be disengaged while the drive gear on the other one of the shafts remains engaged to avoid interruption in application of torque.

Abstract: A method is provided of operating a diesel engine having an exhaust aftertreatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS, selecting an operating mode from among the plurality of operating modes so that exhaust exiting the EATS contains NOX at no more than a predetermined NOX level and a least amount of fuel is consumed per unit energy; and operating the engine in the selected operating mode. An engine arrangement is also provided.

Abstract: The present invention relates to a waste heat recovery system including a first heating line, a second heating line, and a valve section. The first heating line in a working fluid circuit includes a first heat exchanger operatively connected to transfer heat energy to a working fluid. The second heating line in the working fluid circuit includes a second heat exchanger operatively connected to transfer heat to the working fluid. The valve section is selectively controllable to provide a first configuration in which the first heat exchanger and second heat exchangers are operatively connected to the working fluid circuit in parallel and a second configuration in which the first heat exchanger and second heat exchanger are operatively connected to the working fluid circuit in series.

Abstract: A drive axle system can be converted between a single drive tandem axle arrangement including a rear drive axle a dual drive tandem axle arrangement. A forward bowl is provided for a forward axle system. One of a geared forward carrier and an ungeared forward carrier is mounted on the forward bowl, depending upon whether a dual drive or a single drive tandem axle arrangement is desired. To convert to the other type of tandem axle arrangement, the one of the geared forward carrier and the ungeared forward carrier is removed from the forward bowl and replaced, with the other one of the geared forward carrier and the ungeared forward carrier.

Abstract: A device for mixing exhaust gas in an engine air intake includes a mixing chamber disposed or formed in an air intake conduit, the mixing chamber having an inlet for receiving intake air and an outlet for exhausting the intake air, and having a port between the inlet and the outlet and a mixer tube extending into the port, an end portion of the mixer tube disposed in the mixing chamber shaped as a cylindrical-section having an elongated opening facing the mixing chamber outlet and a wall facing the mixing chamber inlet, a cross-sectional area of the end portion of the mixer tube being at least 40% of a cross sectional area of the mixing chamber at a point where the mixer tube extends into the mixing chamber and an end tip of the mixer tube being spaced from a wall of the mixing chamber opposite the aperture by a distance not more than 20% of a width of the mixing chamber.

Abstract: A method is provided for detecting abnormally frequent diesel particulate filter (DPF) regeneration. The method includes measuring a pressure drop across the DPF and using the measured pressure drop to calculate a pressure drop based soot load estimate, calculating soot output from an engine model and using the calculated soot output to calculate an emissions based soot load estimate, comparing the pressure drop based soot load estimate with the emissions based soot load estimate, and providing a warning if a difference between the pressure drop based soot load estimate and the emissions based soot load estimate exceeds a predetermined.

Abstract: A venturi flow meter for an EGR apparatus includes an inner wall defining an interior space including a converging inlet section, a throat section, and a diverging outlet section and an outer wall surrounding the inner wall and attached to the inner wall, the outer wall being spaced from the inner wall to define an insulating space between the inner wall and the outer wall.

Abstract: A vehicle having a multiple drive axle assembly includes a forward axle assembly including a forward interaxle differential, a forward interaxle differential input shaft and a forward interaxle differential output shaft. An intermediate drive shaft is connected to the forward interaxle differential output shaft. A rear axle assembly includes a rear differential and a rear differential input shaft. A rear clutch arrangement is provided between the intermediate drive shaft and the rear differential input shaft and is movable between a first position in which the rear clutch arrangement rotationally locks the intermediate drive shaft and the rear differential input shaft and a second position in which the intermediate drive shaft and the rear differential input shaft are rotationally disconnected. The rear axle assembly of the vehicle can be raised and lowered relative to a frame of the vehicle.

Abstract: A transmission with a countershaft brake includes a countershaft, a positive displacement pump including a pump housing having a chamber with an inlet and an outlet, the pump being driven by the countershaft, and a flow restrictor disposed at or downstream of the chamber outlet, the flow restrictor being adjustable to increase and decrease an amount of flow restriction from, the outlet of the chamber. Torque needed to drive the pump increases with an increasing flow restriction by the flow restrictor. A method for braking a countershaft in a transmission is also provided.

Abstract: A method is provided of operating a diesel engine having an exhaust after treatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS.

Abstract: A turbocharger includes a turbine comprising a scroll passage including at least first and second portions, a gas outlet extending axially from the scroll passage, a turbine wheel including one or more blades disposed in the gas outlet, and structure for establishing a bypass flow between the first and second portions of the scroll passage or for altering gas flow through the turbine. A method for adjusting exhaust gas temperature is also provided.

Abstract: A method of operating an engine includes starting and stopping operation of an internal combustion engine that includes a crankshaft having a bearing journal and a bearing in which the bearing journal is rotatable. The crankshaft is constantly turned when the internal combustion engine is in the non-fueled mode. An oil pump can be driven to lubricate the bearing journal and the bearing while the internal combustion engine is in the non-fueled mode to provide hydrodynamic lubrication. An engine is also disclosed.

Abstract: A series hybrid transmission includes a first motor device for driving a first shaft, a second motor device for driving a second shaft. Drive gears on the first and second shafts can be simultaneously engaged in the same or different gears and torque from die two motor devices can be multiplied. When shifting up or down, the drive gear on one of the shafts can be disengaged while the drive gear on the other one of the shafts remains engaged to avoid interruption in application of torque.

Abstract: Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate filter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use. Malfunctioning components are identified using these measurements and calculations.

Abstract: A method for operating an exhaust aftertreatment system injector to prevent coking includes steps of injecting fuel for heating the aftertreatment devices, when not injecting fuel, flowing air to purge and cool the nozzle to prevent carbon deposits when exhaust gas temperature is low, and substantially stop air flow to allow passive heating of the nozzle by the exhaust for oxidation of any accumulated carbon when exhaust temperature is high enough to support oxidation. Preferably, the nozzle has a catalytic material coating to reduce the temperature necessary for oxidation of the coking material.

Abstract: A method is provided for detecting abnormally frequent diesel particulate filter (DPF) regeneration.

Abstract: A venturi flow meter for an EGR apparatus includes an inner wall defining an interior space including a converging inlet section, a throat section, and a diverging outlet section and an outer wall surrounding the inner wall and attached to the inner wall, the outer wall being spaced from the inner wall to define an insulating space between the inner wall and the outer wall.

Abstract: Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate filter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use. Malfunctioning components are identified using these measurements and calculations.

Abstract: Methods and systems for controlling reductant levels in an SCR catalyst are provided. In one aspect, reductant levels are adjusted in response to a ratio of change of NOx conversion efficiency to a change of reductant level. In another aspect, reductant injection levels are periodically adjusted to see if NOx conversion efficiency is better or worse at the adjusted levels.

Abstract: In a diesel engine and exhaust aftertreatment system, a controller is arranged to control operation of the engine to obtain a first set of exhaust characteristics and to control a fuel injector to inject fuel upstream of a DPF at a first rate of injection until at least one condition is attained, and, after the at least one condition is attained, to control the fuel injector so that a rate of fuel injection is reduced and to contra! operation of the engine to obtain a second set of exhaust characteristics so that regeneration of the DPF occurs. At least one characteristic of the first and second sets of characteristics beina, different. A method for treating, diesei engine exhaust is also disclosed.