An electrically heated element (52) within the exhaust system of a diesel engine raises the exhaust temperature sufficiently at idle or similar low exhaust flow/low exhaust temperature conditions to the point where the DOC (44) is activated to bum fuel. As...

A method of cooling exhaust gas (F) from an engine in an EGR cooler (10) for recirculation to the engine includes the steps of transporting the exhaust gas from the engine to a core assembly (22) disposed inside a single housing assembly (20), and dividing...

Engine systems and methods for accomplishing regeneration of a NOx adsorber (28) using in-cylinder post-injection in a way that creates a lean-rich transition (Figure 3) for regenerating the NOx adsorber while attenuating engine torque output fluctuations ...

An engine (20) and an engine control strategy (Figures 2 and 3) for lean-to-rich transitions, such transitions being useful for various purposes, one of which is purging, or regenerating, a NOx adsorber (36) in the engine exhaust system.

A control system and method for an EGR valve (54), particularly in a diesel engine (30). A processor processes data in feedback control of the position of the valve element to develop from the data a position control signal for setting the extent to which ...

A processor provides feedback control of the exhaust gas recirculation valve based upon the actual position of the valve and its desired position. The processor generates error signals from the position data and from the actual EGR flow and the desired flo...