Method and system for misfire determination using synchronous co

Details Method and system for misfire determination using synchronous co Method and system for misfire determination using synchronous co

1998-07-31

1999-05-25

Dombroske, George

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

73116, 731173, 123419, 123436, G01M 1500

Patent

active

059066520

ABSTRACT:
A method and system of misfire determination includes establishing an acceleration misfire threshold and an acceleration sub-misfire threshold. Then incremental engine position is sensed and a series of acceleration data-points are derived (401). If a data-point of the series of acceleration data-points falls between the sub-misfire threshold and the misfire threshold, then a training process is aborted for a blanking period based on a delay time whose length is preferably based on engine operating conditions (415). If a data-point of the series of acceleration data-points does not fall below the sub-misfire threshold, then the series of acceleration data-points, are averaged and a synchronously corrected acceleration data-point is derived (417). Then, a misfire condition is indicated when the synchronously corrected acceleration data-point exceeds the established acceleration misfire threshold (421).

REFERENCES:
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patent: 5734100 (1998-03-01), Kishimoto et al.
patent: 5819197 (1998-10-01), Fiaschetti

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