Engine ignition control device

摘要

Problem To independently control ignition timings by providing ignition maps dedicated to respective cylinders using only two ignition coils in a 4-cycle engine having four cylinders. Means for Resolution A crank STG setting part 5 sets crank stages based on crank pulses P. A stroke determination part 6 performs the stroke determination based on the crank pulses P and an output signal of a Pb sensor. An absolute STG setting part 7 sets absolute stages based on the crank pulses P after the stroke determination. In first to fourth ignition maps M1 to M4, ignition information intrinsic to the respective cylinders is registered. An ignition map allocation part 9 allocates the ignition maps to the respective cylinders for every system before the stroke determination, and allocates the first to fourth ignition maps M1 to M4 independently to the respective cylinders after the stroke determination. An ignition timing calculation part 8 calculates the ignition timing or the electricity supply start timings of the respective ignition coils 11, 12 based on the ignition maps allocated to the respective cylinders.