Diagnosis apparatus and method for a cylinder pressure sensor

Details Diagnosis apparatus and method for a cylinder pressure sensor Diagnosis apparatus and method for a cylinder pressure sensor

1995-06-13

1996-09-10

Chilcot, Richard

Measuring and testing

Vehicle drive train

Rear end

73 4R, G01M 1500

Patent

active

055548016

ABSTRACT:
Conditions where there is inertial rotation of an engine after switching off an ignition switch, and an opening of a throttle valve disposed in an intake system of the engine is constant, are made diagnosis conditions. When these diagnosis conditions are established, cylinder pressures detected by a cylinder pressure sensor are integrated over a predetermined integral interval, and when the integral value is less than a previously set reference value, this is considered as an abnormality in the output due to a sensor fault, and a fault judgment signal for the cylinder pressure sensor is output.

REFERENCES:
patent: 4962738 (1990-10-01), Iwata
patent: 5024191 (1991-06-01), Nagahiro et al.
patent: 5125267 (1992-06-01), Kuroda et al.
patent: 5168854 (1992-12-01), Hashimoto et al.
patent: 5276625 (1994-01-01), Nakaniwa
patent: 5351528 (1994-10-01), Fukui et al.

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