Method and apparatus for detecting deterioration of sucked air f

Details Method and apparatus for detecting deterioration of sucked air f Method and apparatus for detecting deterioration of sucked air f

1990-06-20

1991-05-14

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

050145487

ABSTRACT:
Disclosed are a method and apparatus for detecting deterioration of a sucked air flow quantity-detecting device of an engine, in which during a predetermined period after the start of use of the engine, detected values of sucked air flow quantities detected by the sucked air flow quantity-detecting device are learned for respective areas of the engine driving state, and then, the detected value of the sucked air flow quantity detected by the air flow quantity-detecting device is compared with the learned value and deterioration of the sucked air flow quantity-detecting device is judged when the difference is larger than a predetermined value.

REFERENCES:
patent: 4594987 (1986-06-01), Wataya et al.
patent: 4836016 (1989-06-01), Nakano et al.
patent: 4930079 (1990-05-01), Kondo

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