Vacuum control valve

Details Vacuum control valve Vacuum control valve

1982-04-20

1983-11-22

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123568, F02M 2506

Patent

active

044162430

ABSTRACT:
A vacuum modulating chamber of a vacuum control valve is communicated with a diaphragm chamber of a EGR valve for controlling an amount of exhaust gas to be recirculated into combustion chambers of an engine, so that a modulated negative pressure is applied thereto. The chamber is provided with a diaphragm deflected responding to the negative pressure in the chamber. The vacuum control valve is further provided with a cam member and a spring which urges the diaphragm in one direction so as to change a value at which the pressure in the vacuum modulating chamber is controlled, wherein a diameter of the cam member is larger than that of the diaphragm.

REFERENCES:
patent: 4269159 (1981-05-01), Skinner
patent: 4280470 (1981-07-01), Ueda

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