Method for diagnosing performance of intake air amount detection

Details Method for diagnosing performance of intake air amount detection Method for diagnosing performance of intake air amount detection

1996-12-05

1998-03-17

Dombroske, George M.

Measuring and testing

Simulating operating condition

Marine

340439, 36443103, G01M 1500, F02D 4500

Patent

active

057289328

ABSTRACT:
Technology for diagnosing an intake air amount detection device of an internal combustion engine, wherein an operation region in which the engine is stably operating is determined, the opening degree of a throttle valve interposed in an intake system of the engine is detected, a change in the opening degree of the throttle valve is calculated when the opening degree of the throttle valve is changed in the determined stable operation region, and an intake air change amount detected by the intake air amount detection device is calculated when the opening degree of the throttle valve is changed in order to diagnose performance of the intake air amount detection device based on a relationship between the change in the opening degree of the throttle valve and the intake air change amount.

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