JPH0256865U

JPH0256865U -

Info

Publication number: JPH0256865U
Application number: JP13582688U
Authority: JP
Priority date: 1988-10-18
Filing date: 1988-10-18
Publication date: 1990-04-24
Anticipated expiration: 2003-08-11
Also published as: JPH0531269Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例である内燃機関点火
装置を示す回路図、第２図はそれが適用される磁
石発電機を示す模式図、第３図および第４図は機
関の正転時および逆転時における内燃機関点火装
置各部の動作をそれぞれ示す各波形図、第５図は
従来の内燃機関点火装置を示す回路図である。１……エキサイタコイル、２……短絡用ダイオ
ード、３……整流用ダイオード、４……パルサコ
イル、８……点火用サイリスタ（半導体開閉素子
）、９……充電用コンデンサ、１０……点火コイ
ル、１１……点火プラグ、１２……点火時期制御
用ＩＣ（点火信号発生手段）、１３……電源回路
、１４……コンデンサ、１５……トランジスタ、
１６……ツエナダイオード（基準電圧発生部）、
１７，１８……抵抗、１９……パルサ（信号発生
源）、２０……磁石発電機、２１……発電子、２
２……回転子、２２ａ……マグネツト、２３……
トリガピース、３０……逆転防止回路。３１……
ＮＯＴ回路（基準電圧検出手段）、３２……制御
手段、３３……ＮＡＮＤ回路、３４……トランジ
スタ、３５〜３８……抵抗。 Fig. 1 is a circuit diagram showing an internal combustion engine ignition system which is an embodiment of the present invention, Fig. 2 is a schematic diagram showing a magnet generator to which it is applied, and Figs. 3 and 4 show normal rotation of the engine. FIG. 5 is a circuit diagram showing a conventional internal combustion engine ignition system. 1... Exciter coil, 2... Short circuit diode, 3... Rectifier diode, 4... Pulsar coil, 8... Ignition thyristor (semiconductor switching element), 9... Charging capacitor, 10... Ignition coil, 11... Spark plug, 12... Ignition timing control IC (ignition signal generation means), 13... Power supply circuit, 14... Capacitor, 15... Transistor,
16...Zena diode (reference voltage generation section),
17, 18... Resistor, 19... Pulsar (signal generation source), 20... Magnet generator, 21... Generator, 2
2...Rotor, 22a...Magnet, 23...
Trigger piece, 30...Reverse rotation prevention circuit. 31...
NOT circuit (reference voltage detection means), 32... control means, 33... NAND circuit, 34... transistor, 35 to 38... resistor.

Claims

[Scope of utility model registration request]

A rectifier diode half-wave rectifies the output of a magnet generator driven by the engine; an ignition coil having a secondary winding connected to the spark plug; a charging capacitor charged by the output of the rectifying diode;
a semiconductor switching element connected to the capacitor and the ignition coil so as to form a closed circuit; a signal generation source that generates an electric signal in synchronization with the engine; and a signal generation source that generates an ignition signal at the ignition timing of the engine. and an ignition signal generating means for bringing the semiconductor switching element into conduction, the internal combustion engine ignition device comprising: a reversal prevention circuit that uses the polarity of the output of the magnet generator to put the semiconductor switching element into an inoperable state. The reversal prevention circuit is connected to a reference voltage generation section of the DC power supply in the ignition signal generation means, and includes a detection means for detecting this reference voltage, and a detection signal from the detection means and a detection signal from the ignition signal generation means. Perform logical calculations with the ignition signal,
and a control means for controlling the operation of the semiconductor switching element based on the result, and further, the ignition signal generating means is configured to generate an ignition signal when the engine rotates normally, so that the output of the magnet generator is not normal. An ignition system for an internal combustion engine, characterized in that it is set to generate an ignition signal when the output of the magnet generator is positive, and when the engine is reversed, the ignition signal is generated when the output of the magnet generator is positive.