Electronic spark timing advance controller

Details Electronic spark timing advance controller Electronic spark timing advance controller

F - Mech Eng,Light,Heat,Weapons

02

P

317/5.35

F02P 3/08 (2006.01)

Patent

CA 1062767

ELECTRONIC SPARK TIMING ADVANCE CONTROLLER Abstract of Disclosure An electronic spark timing advance controller for variably controlling the degree of advance or retardation of the firing event of an internal combustion engine integrates an engine speed signal to produce a signal, which is proportional to engine angular position and is reset at a predetermined reference point or angular position of the engine prior to the firing of each cylinder of the engine. A signal, which is proportional to a predetermined firing angle of the engine, is compared with the engine angular position signal to produce an output signal, which is supplied to spark generating means to produce a spark when the compared signals have a predetermined relation to each other. Additional signals, which vary in accordance with a predetermined engine speed advance characteristic and a predetermined engine vacuum advance character- istic, affect the comparison to vary the firing angle of the engine in accordance with the corresponding engine operating parameters. Additional control over the engine timing is provided in the subject timing controller in which the spark timing is re- tarded at temperatures below the operating temperature of the catalytic reactor installed on an emission controlled engine. The operation of the engine at a retarded spark condition increases the temperature of the exhaust gases supplied to the reactor to provide rapid or accelerated warm-up of the reactor to its effective operating temperature.

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