Method of and apparatus for detecting misfire

Details Method of and apparatus for detecting misfire Method of and apparatus for detecting misfire

1991-02-13

1993-08-17

Black, Thomas G.

Boots, shoes, and leggings

36443104, 123419, 123436, G06F 1500, G01P 300

Patent

active

052375048

ABSTRACT:
In order to detect misfire in an internal combustion engine, engine speed is determined by measuring the time of passage of a crankshaft disc from a first position to a second position during every revolution. A detection circuit takes the reciprocal of the measured times of passage to form a series of engine speeds and forms the difference between consecutive engine speeds. These differences are compared with a threshold to signal a misfire when the threshold is exceeded.

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Proc. 38th IEEE Vehicular Technology Conference 237-244 (Dec. 1988), G. Rizzoni et al. "Fault Isolation and Analysis For IC Engine Onboard Diagnostics".

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