International Engine Intellectual Property Company, LLC

Xiaoyan Lei

Jinhui Sun

Xinqun Gui

Steven T Omachi

Russell P Zukouski

A control ( ) for controlling a variable valve actuation mechanism ( ) of an internal combustion engine ( ) to regenerate a particulate filter ( ) in the exhaust system ( ) of the engine. The control comprises an operating program ( A) for regenerating the particulate filter while the engine is running under its owns power by causing the variable valve actuation mechanism to change the timing of engine cylinder valves during an engine operating cycle, and as a result, elevate the temperature of flow through the exhaust system to a temperature that is effective to combust particles trapped by the filter.

Control strategy for regenerating a particulate filter in an exhaust system of an engine having a variable valve actuation mechanism

A control ( ) for controlling a variable valve actuation mechanism ( ) of an internal combustion engine ( ) to regenerate a NOx adsorber catalyst ( ) in the exhaust system ( ) of the engine. The control comprises an operating program ( ) for regenerating the catalyst while the engine is running under its own power by causing the variable valve actuation mechanism to change the timing of operation of the intake valves ( ) so as to transition the fuel-air ratio of mixture that is being combusted in the cylinders ( ) from a relatively leaner mixture to a mixture that sufficiently richer than stoichiometric to effectively regenerate the catalyst.

Control strategy for regenerating a NOx adsorber catalyst in an exhaust system of an engine having a variable valve actuation mechanism

A control ( ) embodies an operating strategy ( ) to facilitate engine cranking and starting via control of timing of cylinder intake ( ) and exhaust ( ) valve opening using a variable valve actuation mechanism ( ). Prior to fueling any cylinder ( ), the engine ( ) is cranked while the variable valve actuation mechanism causes pistons ( ) to operate at an initial effective compression ratio for initial cranking that is less than an effective compression ratio for running when the engine is eventually fueled and runs under its own power. Thereafter, and still before fueling, they are caused to operate at an increased effective compression ratio, and still thereafter, a portion of their charges are drawn from the exhaust system ( ). As the engine warms up, valve timing is adjusted.

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Naperville, IL, United States of America

Xiaoyan Lei