Method of and apparatus for discriminating misfire

Details Method of and apparatus for discriminating misfire Method of and apparatus for discriminating misfire

1993-10-12

1995-06-20

Chilcot, Jr., Richard E.

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

054252695

ABSTRACT:
A series of engine speed changes is analysed in order to detect a sequence of speed changes characteristic of a misfire having occurred. An embodiment of the invention generates a first mask in response to speed increases and a second mask in response to speed decreases. A misfire can only be signalled when both masks are at a PASS state and misfire detector detects a misfire.

REFERENCES:
patent: 5041979 (1991-08-01), Hirka et al.
patent: 5088318 (1992-02-01), Osawa
patent: 5200899 (1993-04-01), Ribbens et al.
patent: 5207091 (1993-05-01), Shibata et al.
patent: 5216915 (1993-06-01), Sakamoto
patent: 5222392 (1993-06-01), Baba et al.
patent: 5263453 (1993-11-01), Wakahara et al.

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