Method for quantifying oxygen stored in a vehicle emission control device
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United States of America Patent
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Feb 17, 2004
Grant Date -
Jan 30, 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 are provided for determining a present value representative of the quantity of oxygen that is stored in an emission control device receiving exhaust gas generated by an internal combustion engine, as well as a present value for the maximum capacity of the device to store a selected constituent gas of the exhaust gas. The resulting values are advantageously used for adaption of predetermined values for controlling device fill and purge times when operating in an open-loop control mode, whereby open-loop device operation is optimized to reflect changes in device operating conditions.
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