Controlling engine exhaust gas recirculation and vacuum inverter

Details Controlling engine exhaust gas recirculation and vacuum inverter Controlling engine exhaust gas recirculation and vacuum inverter

1980-09-09

1982-12-28

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123408, 137102, 137103, 137DIG8, F02M 2506

Patent

active

043656080

ABSTRACT:
Engine manifold vacuum is inverted by an in-line vacuum inverter which provides a power source for an EGR valve actuator for providing desired EGR flow in a predetermined range of engine power loading and EGR flow is cut off outside the range. The invention utilizes a vacuum inverter employing a pair of spaced diaphragms for controlling an atmospheric air bleed valve to a vacuum chamber powered by manifold vacuum. The diaphragms are spring loaded so as to seek equilibrium positions as vacuum in the chamber varies force. The inverter produces a vacuum output signal which changes inversely with changes in engine manifold vacuum.

REFERENCES:
patent: 3762384 (1973-10-01), Day et al.
patent: 3799131 (1977-03-01), Bolton
patent: 3880129 (1975-04-01), Hollis, Jr.
patent: 3982553 (1976-09-01), Johnston et al.
patent: 3982555 (1976-09-01), Aubel et al.
patent: 4116182 (1978-09-01), Bradshaw
patent: 4166476 (1979-09-01), Yamanaka et al.
patent: 4173204 (1979-11-01), Takayama et al.
patent: 4334515 (1982-06-01), Otsuka

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