Misfire detecting system for internal combustion engine

Details Misfire detecting system for internal combustion engine Misfire detecting system for internal combustion engine

1993-06-01

1995-01-17

Raevis, Robert

Measuring and testing

Test stand

For engine

G01M 1500

Patent

active

053816897

ABSTRACT:
In a misfire detecting system for an internal combustion engine, the ratio of periods of time is detected which correspond to predetermined angular intervals which are provided before and after a particular reference angle of a reference period signal providing a crank angle position corresponding to the timing of ignition of the internal combustion engine; the acceleration of the time ratio is obtained, to determine it from the acceleration or time ratio whether or not a misfire has occurred; and the resolution of detecting the time corresponding to the predetermined angular intervals is changed according to the number of revolutions per minute of the engine.

REFERENCES:
patent: 3972230 (1976-08-01), Hanson et al.
patent: 4302814 (1981-11-01), Full et al.

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