Automotive misfire cylinder identification system

Details Automotive misfire cylinder identification system Automotive misfire cylinder identification system

1994-01-28

1995-05-16

Chilcot, Jr., Richard E.

Measuring and testing

Vehicle chassis

Steering

60227, 36443108, G01L 326, G01L 513, G01M 1500

Patent

active

054150361

ABSTRACT:
An automobile engine has a pressure transducer in its exhaust system, and misfires are identified by the pressure drop accompanying the misfire, and the timing of the pressure drop relative to the cylinder identification signal. This may be accomplished digitally, sampling the pressure level at a rate of 1,000 cycles per second or more, and statistically analyzing the samples representing relative pressure. The sharp pressure drop and the range of pressures are important parameters in identifying the misfiring cylinder.

REFERENCES:
patent: 3965677 (1976-06-01), Goto et al.
patent: 3983754 (1976-10-01), Deguchi et al.
patent: 4040294 (1977-08-01), Matsuda et al.
patent: 4083234 (1978-04-01), Aono et al.
patent: 4302814 (1981-11-01), Full et al.
patent: 4388668 (1983-06-01), Bell et al.
patent: 4892075 (1990-01-01), Iriyama et al.
patent: 5269178 (1993-12-01), Vigmostad et al.

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