Device for determining misfiring of a cylinder of a multicylinde

Details Device for determining misfiring of a cylinder of a multicylinde Device for determining misfiring of a cylinder of a multicylinde

1992-07-16

1994-02-22

Raevis, Robert

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

052877370

ABSTRACT:
The device for determining a misfiring of a cylinder of a multicylinder engine determines that a misfire has occurred when a change in the angular velocity of the crank shaft detected by a crank angle sensor mounted to the engine body becomes larger than a predetermined set value, and to prevent a misjudgement caused by engine vibration, the device changes the mode of operation for determining the misfire when the engine is operated in a region in which the engine vibration is increased, i.e., in this operating region, the determination of the misfire is not carried out, or the above predetermined set value for the change in angular velocity is increased.

REFERENCES:
patent: 4268910 (1981-05-01), Omori et al.
patent: 4383440 (1983-05-01), Murata
patent: 4930479 (1990-06-01), Osawa et al.
patent: 5021960 (1991-06-01), Manaka et al.
patent: 5044195 (1991-09-01), James et al.
patent: 5144927 (1992-09-01), Denz

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