Exhaust gas recirculation control apparatus for an internal comb

Details Exhaust gas recirculation control apparatus for an internal comb Exhaust gas recirculation control apparatus for an internal comb

1996-02-22

1997-05-27

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F02M 2507

Patent

active

056322585

ABSTRACT:
According to the present invention, the exhaust gas recirculation control apparatus includes a first switching valve for controlling communication between the positive pressure supplying source and the control valve. The first switching valve opens only when the control means increases and maintains the predetermined pressure supplied to the EGR valve, and under other conditions, the first switching valve closes, so that the positive pressure of the positive pressure supplying source can be utilized only when needed and the positive pressure accumulated inside the positive pressure supplying source can be prevented from leaking from the control valve. When an air compressor, which is mounted for a braking in a vehicle, is commonly used for the EGR valve as the positive pressure supplying source, air pressure of the brake system in the air compressor can be effectively used, a small-sized EGR apparatus being thereby manufactured.

REFERENCES:
patent: 3974807 (1976-08-01), Nohira et al.
patent: 4088101 (1978-05-01), Wakita
patent: 4170971 (1979-10-01), Yamanaka et al.
patent: 4314532 (1982-02-01), Payne
patent: 4445488 (1984-05-01), Tanaka et al.

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