Engine exhaust gas recirculating control

Details Engine exhaust gas recirculating control Engine exhaust gas recirculating control

1973-08-24

1976-01-06

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123119A, F02m 2506

Patent

active

039304752

ABSTRACT:
The engine has a duct connecting the gases in the exhaust gas crossover passage to the intake manifold, the duct normally being closed by a valve that is opened by manifold vacuum that is modulated as a function of carburetor throttle blade opening and connected to the duct past an air-bleed device that normally is open and closed against a spring force by unmodulated manifold vacuum below a predetermined level so that the gas recirculating valve opening signal force varies directly with manifold vacuum decreases to prevent recirculation during engine idle and cruising and wide-open throttle operations while providing controlled operation in the engine accelerating range between.

REFERENCES:
patent: 3542004 (1970-11-01), Cornelius
patent: 3713428 (1973-01-01), Sandhagen
patent: 3717131 (1973-02-01), Chana et al.
patent: 3741179 (1973-06-01), Vartanian
patent: 3768452 (1973-10-01), Lewis
patent: 3774583 (1973-11-01), King
patent: 3783847 (1974-01-01), Kolody
patent: 3800765 (1974-04-01), Thompson

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