Misfire detection dependent on intake air charge fluctuations

Details Misfire detection dependent on intake air charge fluctuations Misfire detection dependent on intake air charge fluctuations

1996-01-25

1997-04-01

Chilcot, Richard

Measuring and testing

Test stand

For engine

73115, 731173, G01M 1500

Patent

active

056168349

ABSTRACT:
A misfire detection system and method measures fluctuations of air charge ingested into an engine 303, preferably as fluctuations of the engine's intake air pressure or as fluctuations of the mass air flow. A misfire indication 337 is provided dependent on a behavior of the fluctuations of air charge. Preferably, to eliminate errors associated with engine transient operating conditions, such as acceleration, the fluctuations of air charge are differentiated 325 before a misfire detection mechanism 333 is used to determine misfire behavior.

REFERENCES:
patent: 4083234 (1978-04-01), Aono et al.
patent: 5003950 (1991-04-01), Kato et al.
patent: 5076098 (1991-12-01), Miwa
patent: 5127262 (1992-07-01), Demizu et al.
patent: 5321979 (1994-06-01), McKendry et al.
patent: 5351528 (1994-10-01), Fukui et al.
patent: 5375462 (1994-12-01), Kuroda et al.
patent: 5546795 (1996-08-01), Yamagishi

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