Combustion state-determining system for internal combustion engines
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United States of America Patent
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May 7, 1996
Grant Date -
N/A
app pub date -
Aug 25, 1994
filing date -
Aug 26, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A combustion state-determining system for an internal combustion engine, includes an ECU which detects misfires occurring in the engine, calculates a rate of misfire occurrence every predetermined number of firing cycles, based on the detected misfires, and determines that the engine is in a misfiring state when the calculated rate of misfire occurrence exceeds a predetermined reference rate. Further, a temperature state of the engine is detected, and the predetermined reference rate is changed based on the detected temperature state.
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