Misfire diagnosis apparatus for an internal combustion engine

Details Misfire diagnosis apparatus for an internal combustion engine Misfire diagnosis apparatus for an internal combustion engine

1991-05-14

1993-06-08

Raevis, Robert

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

052169154

ABSTRACT:
A misfire diagnosis apparatus for an internal combustion engine is shown including initial acceleration judging unit, delay unit, and a misfire judging unit. The initial acceleration judging unit operates to judge the initial state of a starting acceleration or a gear shift acceleration on the basis of the detected result of acceleration detecting unit. Subsequently, the delay unit operates to stop a misfire judgement for a predetermined time period when the initial acceleration is judged. The misfire judging unit operates to start the misfire judgement operation after a lapse of a predetermined delay time period. Since the misfire judgement is stopped during the initial acceleration, erroneous diagnoses of misfirings are avoided.

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patent: 4966115 (1990-10-01), Ito et al.
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