Forced regeneration of a diesel particulate filter
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United States of America Patent
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-
Dec 14, 2004
Grant Date -
Feb 19, 2004
app pub date -
Aug 13, 2002
filing date -
Aug 13, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An engine control system (22) of a diesel engine (20) that powers a motor vehicle processes data in execution of a strategy (FIG. 4) to provide control of both timing and duration of forced regeneration of a diesel particulate filter (42). The overall strategy is a hybrid of model-based and closed-loop control strategies. Redundant elements of the strategy (FIG. 6) determine when forced regeneration is called for. Forced regeneration is initiated by retarding the timing of the start of main fuel injection (100). Fueling is then adjusted (98) both to enhance catalytic action and to make the process transparent to a driver of the vehicle.
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