Spark vacuum advance control

Details Spark vacuum advance control Spark vacuum advance control

1977-05-13

1979-01-23

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123119A, F02P 504, F02M 2506

Patent

active

041354800

ABSTRACT:
An ignition spark advance system for use with spark ignited internal combustion engines having an exhaust gas recycle system which includes EGR vacuum modulator means connected to and modulating an exhaust gas recycle valve. A conventional first vacuum actuated spark advance unit responsive to manifold vacuum signal cooperates with a second vacuum actuated spark advance unit responsive to EGR vacuum signal to advance the ignition spark. The second vacuum actuated spark advance unit provides additional spark advance during periods of lower intake manifold vacuum caused by exhaust gas recycle when the spark advance due to the first unit decreases.

REFERENCES:
patent: 4040401 (1977-08-01), Marsee

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