Internal combustion engine ignition system

摘要

An internal combustion engine ignition system comprising the combination of an electronic data processor unit that is adapted to calculate an ignition spark event engine crankshaft angle, an associated electronic control unit, and a source of alternating current timing signals. The electronic control unit is responsive to the alternating current timing signals to produce an engine crankshaft position reference signal that is supplied as an input engine crankshaft position reference signal to the data processor unit and also is capable of effecting ignition spark in response to the alternating current timing signals during periods of engine crank and during periods of data processor unit malfunction.