Ignition timing controller for an internal combustion engine

摘要

An ignition timing controller for an internal combustion engine which is capable of automatically correcting the deviation of the ignition timing from the normal positions thereof in the cycle of the internal combustion engine is disclosed. Preliminary timing signals which are advanced by an angle in the cycle of the engine in proportion to the rotational speed of the engine are generated by a preliminary timing signal generator. The ignition timing signals are produced in said ignition timing controller by retarding said preliminary timing signals by a phase shifter in said controller. The advance angle by which the ignition timing signals are advanced with respect to reference timing signals which are generated for a reference purpose at fixed rotational angles in the cycle of the engine is detected, and the sum of said advance angle and the angle by which the preliminary timing signal is retarded by the phase shifter is memorized as a control signal by a memory during the idling state of the engine. The retarded angle by which the preliminary timing signals are retarded in the cycle of the engine is controlled by the memorized correction signal, so that the retarded preliminary timing signals, namely the ignition timing signals, and the reference timing signals coincide in the rotational angles thereof in the cycle of the engine while the engine is in the idling state.