Air-fuel ratio optimization logic for an electronic engine control systems
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United States of America Patent
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Jan 4, 1994
Grant Date -
N/A
app pub date -
Jun 16, 1992
filing date -
Jun 16, 1992
priority date (Note) -
Expired
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Abstract
An air-fuel optimization logic for an electronic engine control system for optimizing the efficiency of a heat engine. The engine control system has a governor generating fuel command signals to maintain speed of the engine at a desired speed, means for generating a reference air-fuel ratio signal, means responsive to the fuel command signal and the air-fuel ratio signal for supplying air to the engine, and means responsive to the fuel command signal for supplying fuel to the engine. The air-fuel optimization logic has means responsive to a change in the fuel command signal to generate an optimized air-fuel ratio offset signal which when summed with the a reference air-fuel ratio signal produces an optimized air-fuel ratio signal. The air-fuel optimization logic increments the reference air-fuel ratio signal to find a lean offset and decrements the reference air-fuel ratio signal to find a rich offset. The lean and rich offsets are averaged to generate the optimized air-fuel ratio offset.
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