CONTROL STRATEGY FOR REGENERATING A PARTICULATE FILTER IN ANEXHAUST SYSTEM

摘要

A control (30) for controlling a variable valve actuation mechanism (26) of an internal combustion engine (10) to regenerate a particulate filter (35) in t he exhaust system (25) of the engine. The control comprises an operating progra m (50, 50A) for regenerating the particulate filter while the engine is runnin g 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.< /SDOAB>