Catalytic converter temperature control system and method
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United States of America Patent
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-
Aug 14, 2001
Grant Date -
N/A
app pub date -
Dec 8, 1998
filing date -
Dec 8, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electronic engine controller controls the catalytic converter temperature by generating a desired rich air/fuel ratio that will maintain the catalytic converter at a predetermined temperature. The actual air/fuel ratio is ramped to the desired air/fuel ratio at a first rate when the catalytic converter temperature is greater than a first predetermined temperature. The actual air/fuel ratio is ramped to the desired air/fuel ratio at a second rate when the catalytic converter temperature is greater than a second predetermined temperature but less than the first predetermined temperature.
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