초록 ▼

An ignition system for the internal combustion engine is provided wherein a retard start timing and a conduction start timing are provided on the basis of an electrical signal produced from a pick-up coil. An ignition timing is provided at a time point following a retard time determined from the ret

An ignition system for the internal combustion engine is provided wherein a retard start timing and a conduction start timing are provided on the basis of an electrical signal produced from a pick-up coil. An ignition timing is provided at a time point following a retard time determined from the retard start timing in accordance with the engine operating conditions while advancing the retard start timing in accordance with the engine r.p.m. Before the lapse of a cut-off period of the ignition coil current required for producing a required ignition pulse, the cut-off state of the ignition coil current is maintained and the conduction start timing is prevented from advancing before the time point immediately following the lapse of the cut-off period.

대표청구항 ▼

An ignition system for the internal combustion engine, comprising: (a) means for generating an electrical signal repeated in synchronism with the rotation of the engine; (b) timing means for providing a retard start timing signal and a conduction start timing signal on the basis of said electrical s

An ignition system for the internal combustion engine, comprising: (a) means for generating an electrical signal repeated in synchronism with the rotation of the engine; (b) timing means for providing a retard start timing signal and a conduction start timing signal on the basis of said electrical signal; (c) retard means for determining a retard time in accordance with the operating conditions of said engine and providing an ignition timing signal at a time point when said retard time has passed following said retard start timing signal; (d) conduction duty increasing means for advancing the timing of said conduction start timing signal in a manner to increase the conduction duty of the ignition coil depending on the revolutional speed of said engine; (e) power output means for starting the conduction of a current for storing in said ignition coil the electromagnetic energy required for producing an ignition pulse at the time of said conduction start timing signal, said power output means substantially cutting off said current at the time of said ignition timing signal; and (f) ignition security means for setting an ignition time required for generating said ignition pulse in response to said substantial cut-off of said ignition coil current, said ignition time starting from said ignition timing provided by said retard means, signal and including means for preventing said conduction duty increasing means from advancing the timing of said conduction start timing signal before the lapse of said ignition time.