Ignition timing control system of engine

Details Ignition timing control system of engine Ignition timing control system of engine

F - Mech Eng,Light,Heat,Weapons

02

P

123/12

F02P 9/00 (2006.01) F02D 37/02 (2006.01) F02P 5/10 (2006.01)

Patent

CA 1060292

ABSTRACT OF THE DISCLOSURE Spark timing control apparatus for an internal combustion engine having a throttle controlled intake passage for an air-fuel mixture. A vehicle is powered by the engine. A vacuum line from the intake passage downstream from the throttle valve is connected to a three-way valve which, in turn, has one conduit connected to a spark advance chamber and another conduit connected to a spark retard chamber. Another valve closes the vacuum line when the engine temperature is low. An electrical switch sensitive to velocity of the vehicle actuates the three-way valve electro- magnetically to connect the vacuum line to either of said chambers for actuating a movable member which controls the ignition timing of the engine. The conduit leading to the spark retard chamber also leads to a vacuum chamber in an additional fuel supply system having a valve, so that when the spark is retarded the additional fuel supply is cut off.

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