Apparatus for controlling the recirculated exhaust gas quantitie

Details Apparatus for controlling the recirculated exhaust gas quantitie Apparatus for controlling the recirculated exhaust gas quantitie

1979-10-15

1981-12-08

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

F02M 2506, F02B 4708

Patent

active

043042090

ABSTRACT:
An apparatus is proposed which serves the purpose of controlling the exhaust gas recirculation quantity and the injection quantity in auto-igniting internal combustion engines. In this apparatus, an arbitrarily actuatable throttle valve is provided in the intake manifold, downstream of which a control pressure is withdrawn from the intake manifold and used to actuate a pneumatic adjustment device which determines the position of the quantity adjustment device of a fuel injection pump. This control pressure simultaneously serves to actuate an exhaust gas recirculation valve and acts counter to the force of a restoring spring in the work chamber of a second pneumatic adjustment device. Thus, during idling and at full-load of the engine, little exhaust gas or none at all is recirculated and at medium-load and rpm the exhaust gas recirculation quantity is controlled in accordance with the induced air quantity, that is, according to load and rpm; at the same time, in the same sense, the suction pressure which actuates the quantity adjustment device is a standard for load and rpm, that is, for the induced air quantity. Thus with increasing suction pressure less fuel is injected, and more exhaust gas is recirculated, and at a desired high load level the power output of the engine is not impaired by exhaust gas recirculation.

REFERENCES:
patent: 4157081 (1979-06-01), Wake et al.

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