JPS63105771U

JPS63105771U -

Info

Publication number: JPS63105771U
Application number: JP20002986U
Authority: JP
Priority date: 1986-12-26
Filing date: 1986-12-26
Publication date: 1988-07-08

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す回路図、第２図
は同実施例で用いる信号コイルの出力波形及び波
形整形回路から得られるパルスの波形を示す波形
図、第３図は従来例を示す回路図である。１……点火コイル、２……点火プラグ、３……
コンデンサ、４……サイリスタ（半導体スイツチ
）、５……ダイオード、６……エキサイタコイル
、７……ダイオード、１４……信号コイル、１５
……点火位置制御回路、１６，１７……逆転防止
用ダイオード、１８……ダイオード、２０……第
１の波形整形回路、２１……第２の波形整形回路
。 Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a waveform diagram showing the output waveform of the signal coil used in the same embodiment and the waveform of the pulse obtained from the waveform shaping circuit, and Fig. 3 is a conventional example. FIG. 1...Ignition coil, 2...Spark plug, 3...
Capacitor, 4... Thyristor (semiconductor switch), 5... Diode, 6... Exciter coil, 7... Diode, 14... Signal coil, 15
...Ignition position control circuit, 16, 17... Diode for preventing reverse rotation, 18... Diode, 20... First waveform shaping circuit, 21... Second waveform shaping circuit.

Claims

[Claims for Utility Model Registration] An ignition coil, a primary current control circuit that controls the primary current of the ignition coil to perform an ignition operation through the operation of a semiconductor switch, a signal coil that outputs a first signal and a second signal at a rotational position and a second rotational position, respectively; and a signal coil that outputs a first signal and a second signal at a rotational position and a second rotational position, respectively; A first waveform shaping circuit and a second waveform shaping circuit that output pulses, and a first rotational position and a second rotational position according to the rotation of the engine using the first and second pulses as input. an ignition position control circuit that provides the primary current control circuit with an ignition timing signal whose generation position changes between 1 and 2; and a diode connected in parallel to the exciter coil with the anode toward ground to substantially short-circuit the half-cycle output of the exciter coil. , the second rotational position corresponds to a minimum advance angle position during forward rotation of the internal combustion engine, and the first rotational position is a position more advanced than the second rotational position. A reversal prevention diode is connected between the non-grounded output terminal of the second waveform shaping circuit and the non-grounded terminal of the exciter coil, and when the internal combustion engine rotates in reverse, the exciter coil Internal combustion characterized in that the phase relationship between the output of the exciter coil and the output of the signal coil is set such that the signal coil generates the second signal while generating the output of a half cycle. Engine ignition system.