Electronic control apparatus for an internal combustion engine

Details Electronic control apparatus for an internal combustion engine Electronic control apparatus for an internal combustion engine

1991-04-08

1992-09-29

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F02M 2507

Patent

active

051506955

ABSTRACT:
An electronic control apparatus for an internal combustion engine which comprises a control device for exhaust gas return having a control valve for exhaust gas return so that a part of exhaust gas returns from an exhaust gas passage to a suction gas passage, a pressure sensor for detecting pressure in a suction gas pipe, and a failure detecting means for detecting failure of said control device for exhaust gas return based on a value of pressure in said suction gas pipe when said control value for exhaust gas return is in operation, and a second value of pressure in the exhaust gas pipe when the control valve of exhaust gas return is not in operation.

REFERENCES:
patent: 4640257 (1987-02-01), Kodama et al.
patent: 4671107 (1987-06-01), Chiesa et al.
patent: 4715348 (1987-12-01), Kobayashi et al.
patent: 4825841 (1989-05-01), Norota et al.

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