Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Patent
1981-10-02
1982-10-19
Burns, Wendell E.
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
123571, F02M 2506
Patent
active
043544762
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an arbitrarily actuatable throttle valve is provided in the intake manifold, downstream of which a control pressure is withdrawn from the intake manifold and used to actuate a pneumatic adjustment device which determines the position of the quantity adjustment device of a fuel injection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.
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patent: 4276866 (1981-07-01), Higashiyama
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patent: 4325348 (1982-04-01), Abe et al.
Burns Wendell E.
Greigg Edwin E.
Robert & Bosch GmbH
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