Multi-stage exhaust gas recirculation system

Details Multi-stage exhaust gas recirculation system Multi-stage exhaust gas recirculation system

1981-11-12

1983-08-16

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123589, F02M 2506

Patent

active

043985254

ABSTRACT:
An automotive type exhaust gas recirculation (EGR) system has two modes of operation, a first one that regulates EGR flow at a constant percentage rate as a function of throttle valve position independently of exhaust gas backpressure changes, and a second one that provides a variable percentage rate of flow of EGR gases in response to changes in exhaust gas backpressures, both modes utilizing carburetor ported vacuum modified by an air bleed device as the EGR valve opening force.

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patent: 4128090 (1978-12-01), Aoyama
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patent: 4180034 (1979-12-01), Vogelsberg
patent: 4186698 (1980-02-01), Aoyama
patent: 4248186 (1981-02-01), Yamada

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