Exhaust gas recirculation system

Details Exhaust gas recirculation system Exhaust gas recirculation system

1985-12-24

1987-08-04

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

F02M 2506

Patent

active

046838635

ABSTRACT:
Amount of recirculated gases is increased at heavy load on an engine so as to improve the emission control. An EGR valve has a first chamber applied with the pressure at an EGR port in an intake passage and a second chamber applied with the pressure in the intake passage at upstream of a throttle valve so as to open the EGR valve. A control valve is provided to be operated pressures in the intake passage to control the pressure in the second chamber so as to open the EGR valve at heavy load on the engine.

REFERENCES:
patent: 4056084 (1977-11-01), Baumgartner
patent: 4057043 (1977-11-01), Harada
patent: 4147494 (1979-04-01), Ando et al.
patent: 4180035 (1979-12-01), Saiki et al.
patent: 4224909 (1980-09-01), Toyama et al.
patent: 4484445 (1984-11-01), Gillbrand

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