Air-fuel ratio control system having function of after-start lean-burn control for internal combustion engines
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United States of America Patent
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Nov 24, 1998
Issued Date -
N/A
app pub date -
Aug 13, 1997
filing date -
Feb 24, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided an air-fuel ratio control system for an internal combustion engine installed on an automotive vehicle. The control system controls the air-fuel ratio of a mixture supplied to the engine to a value leaner than a stoichiometric air-fuel ratio immediately after the start of the engine. Operating conditions of the engine and/or operating conditions of the automotive vehicle is detected. Starting of the vehicle is predicted based on the detected operating conditions of the engine and/or the detected operating conditions of the automotive vehicle. The air-fuel ratio of the mixture supplied to the engine is changed to a richer value than the leaner value when the starting of the vehicle is predicted.
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