Trouble detector system for an intake system of an automotive en

Details Trouble detector system for an intake system of an automotive en Trouble detector system for an intake system of an automotive en

1990-02-06

1990-12-11

Raevis, Robert R.

Measuring and testing

Vehicle chassis

Steering

123193, G01M 1500

Patent

active

049761390

ABSTRACT:
A plurality of reference pressures for pressures in an intake passage of the engine are stored in a memory so as to be derived in accordance with speed of the engine and opening degree of a throttle valve of the engine. A reference pressure is derived from the memory in accordance with the engine speed and the corrected opening degree. The reference pressure is delayed. Pressure in an intake pipe is compared with the delayed reference pressure. An abnormality signal is generated when the intake pipe pressure is higher than the delayed reference pressure.

REFERENCES:
patent: 4736626 (1988-04-01), Mizuno et al.
patent: 4759332 (1988-07-01), Morozumi

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