Load responsive EGR valve

Details Load responsive EGR valve Load responsive EGR valve

1977-12-27

1979-04-24

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041506499

ABSTRACT:
An engine exhaust gas recirculation (EGR) valve assembly consists of twin force actuating mechanisms within a single housing provided by two spaced flexible diaphragms one of which engages the another at times to control movement of the EGR valve, the diaphragms defining a lower manifold vacuum chamber connected to the EGR valve, an intermediate atmospheric pressure chamber, and an upper ported or spark port vacuum chamber, to provide an EGR flow schedule that varies as a function of engine load.

REFERENCES:
patent: 3713428 (1973-01-01), Sandhagen
patent: 3800765 (1974-04-01), Thompson
patent: 3878823 (1975-04-01), Vartanian
patent: 3885538 (1975-05-01), Suter
patent: 3962868 (1976-06-01), Matumoto et al.
patent: 4052969 (1977-10-01), Ando et al.

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