Ignition timing apparatus for internal combustion engines

Details Ignition timing apparatus for internal combustion engines Ignition timing apparatus for internal combustion engines

F - Mech Eng,Light,Heat,Weapons

02

P

123/11

F02P 5/10 (2006.01) F02P 5/14 (2006.01)

Patent

CA 1037328

ABSTRACT OF THE DISCLOSURE Ignition timing control apparatus for an internal combustion spark ignition engine employs a vacuum actuator having a movable element positioned between first and second vacuum chambers and arranged to advance or retard the spark timing. A single three-way control valve, electrically operated, serves to connect one of the vacuum chambers to engine intake vacuum pressure and to vent the other vacuum chamber to atmosphere, depending on speed of the vehicle driven by the engine. A temperature responsive valve cuts off engine intake vacuum pressure to the three-way control valve when the ambient temperature drops below a predetermined level.

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