Method and apparatus for detecting failure of pressure sensor in

Details Method and apparatus for detecting failure of pressure sensor in Method and apparatus for detecting failure of pressure sensor in

1991-08-22

1992-12-08

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123690, F02P 514

Patent

active

051688549

ABSTRACT:
Method and apparatus for detecting a failure of a pressure sensor provided in association with a cylinder of an internal combustion engine for detecting the pressure therein. Decision as to occurrence of a failure in the pressure sensor is made on the basis of the cylinder pressure detected by the pressure sensor through comparison with a prescribed reference value or range. Failure of the pressure sensor is determined if the detected cylinder pressure deviates from the reference value or range by a predetermined amount. Upon detection of a pressure sensor failure, an engine control parameter such as ignition timing for controlling the associated cylinder in dependence on the pressure sensor output is set to a fixed value or the operation of the cylinder is stopped.

REFERENCES:
patent: 4320729 (1982-03-01), Sawada et al.
patent: 4531399 (1985-02-01), Aono
patent: 4821194 (1989-04-01), Kawamura
patent: 4903664 (1990-02-01), Shinshi
patent: 4970667 (1990-11-01), Abo
patent: 4995365 (1991-02-01), Denz et al.

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