Valve position sensor diagnostic

Details Valve position sensor diagnostic Valve position sensor diagnostic

1990-10-25

1992-01-14

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

050799460

ABSTRACT:
A throttle valve diagnostic apparatus monitors the integrity of a throttle valve position sensor in an internal combustion engine using an engine parameter indirectly related to the value position. If the absolute pressure of the air in the intake manifold associated with the throttle valve is less than a predetermined pressure for a predetermined amount of time while the position sensor indicates a valve position greater than a predetermined position, the valve position sensor is assumed to be faulty.

REFERENCES:
patent: 4471741 (1984-09-01), Asik et al.
patent: 4615321 (1986-10-01), Haefner et al.
patent: 4665871 (1987-05-01), Shimomura et al.
patent: 4799467 (1989-01-01), Ishikawa et al.
patent: 4836016 (1989-06-01), Nakano et al.
patent: 4951206 (1990-08-01), Kyohzuka

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