System and method controlling engine based on predicated engine operating conditions
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United States of America Patent
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Oct 29, 2002
Grant Date -
N/A
app pub date -
Jun 20, 2001
filing date -
Jun 20, 2001
priority date (Note) -
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Abstract
The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. To dQ so, the invented system estimates an amount of oxidants stored in the catalyst. The amount of oxidants stored is estimated by determining an amount of oxidants that are available for storage by the catalyst or that are needed to oxidize hydrocarbons being produced by the engine. The estimate of the amount of oxidants that are available for storage by the catalyst or that are needed to oxidize hydrocarbons is adjusted based on a feedback parameter. Further, the desired amount of oxidants stored in the device is adjusted based on a prediction of future operating conditions.
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