Spark vacuum advance control

Details Spark vacuum advance control Spark vacuum advance control

F - Mech Eng,Light,Heat,Weapons

02

P

123/12

F02P 5/10 (2006.01)

Patent

CA 1042741

SPARK VACUUM ADVANCE CONTROL Abstract of the Disclosure 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.

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