Method and apparatus for determining the A/F ratio of an internal combustion engine
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United States of America Patent
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-
Mar 26, 2002
Grant Date -
N/A
app pub date -
May 19, 2000
filing date -
Jun 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method is disclosed for using a computer for determining an air-to-fuel (A/F) ratio of an internal combustion engine in which information characteristic of the engine relating the A/F ratio of the engine, the exhaust gas temperature of the engine, the speed of the engine and a parameter related to the load of the engine is previously stored in the computer. The method comprises the steps of: measuring the exhaust gas temperature of the engine; measuring the speed the speed of the engine; measuring the parameter related to the load of the engine; computing the A/F ratio based on the previously stored information, the measured exhaust gas temperature, the measured speed and the measured parameter related to the load; and outputting a signal representative of the A/F ratio.
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