Apparatus and method for detecting misfire in an internal combus

Details Apparatus and method for detecting misfire in an internal combus Apparatus and method for detecting misfire in an internal combus

1995-04-13

1996-11-05

Chilcot, Richard

Measuring and testing

Vehicle chassis

Steering

73 3506, G01M 1500

Patent

active

055719589

ABSTRACT:
A basic injection pulse width Tp which is representative of engine load is weightingly averaged, and a judgment value is set based on the weighted average value. The combustion pressure is integrated over a predetermined integral interval and when the combustion pressure integral value is below the judgment value, misfire is judged to have occurred. When the frequency of misfire is more than or equal to a predetermined value, a warning is given.

REFERENCES:
patent: 4781059 (1988-11-01), Suzuki et al.
patent: 4821194 (1989-04-01), Kawamura
patent: 4996959 (1991-03-01), Akimoto
patent: 5116259 (1992-05-01), Demizu et al.
patent: 5127262 (1992-07-01), Demizu et al.
patent: 5309756 (1994-05-01), Osawa et al.

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