Spark timing control

Details Spark timing control Spark timing control

F - Mech Eng,Light,Heat,Weapons

02

P

317/5.35

F02P 5/15 (2006.01) F02P 7/077 (2006.01) F02P 9/00 (2006.01) F02P 15/00 (2006.01)

Patent

CA 1321615

G-650 C-4042 SPARK TIMING CONTROL Abstract of the Disclosure A spark timing control for an electronic internal combustion engine ignition system that provides a constant spark advance regardless of engine speed. A series of crankshaft pulses are developed which occur at each 60 degrees of rotation of the crankshaft. The system has a source of constant frequency clock pulses which are counted up by an up-counter during 60 degree periods. The count attained by the up-counter during a 60 degree period is loaded into a down-counter. The up-counter is now counted up at a constant rate from zero and the down-counter is counted down at a constant rate from the count magnitude that was loaded into the down-counter. When the count magnitudes of the two counters are equal, a digital comparator that is connected to the counters develops an output signal that can be used to cause the firing of a spark plug.

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