Method and system for optimizing purge of exhaust gas constituent stored in an emission control device
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United States of America Patent
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-
Feb 10, 2004
Grant Date -
Jan 2, 2003
app pub date -
Jun 19, 2001
filing date -
Jun 19, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for optimizing the purging of a constituent gas of a vehicle engine's generated exhaust gas from an emission control device is disclosed wherein the amplitude of the output signal generated by a downstream switching oxygen sensor, and the time response of the sensor, is used to iteratively adjust a current purge time to obtain an optimized purge time.
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