JPH0224074U

JPH0224074U -

Info

Publication number: JPH0224074U
Application number: JP10113588U
Authority: JP
Priority date: 1988-08-01
Filing date: 1988-08-01
Publication date: 1990-02-16

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例による機関点火装
置の回路図、第２図は従来の機関点火装置の回路
図、第３図は第２図の各部の電圧、電流の波形を
機関の回転角に対して示した図である。図において、１……エキサイタコイル、３……
コンデンサ、４……点火コイル、７……サイリス
タ、８……点火位置制御回路、９……制御電源回
路、１０……サイリスタ、１１，１３，１４……
ダイオード、１２……第１のコンデンサ、１５…
…第２のコンデンサ、１９……トランジスタ、２
０……ツエナーダイオードである。なお、各図中
同一符号は同一又は相当部分を示す。 Figure 1 is a circuit diagram of an engine ignition system according to an embodiment of this invention, Figure 2 is a circuit diagram of a conventional engine ignition system, and Figure 3 shows waveforms of voltage and current at various parts of Figure 2 as the engine rotates. FIG. In the figure, 1... exciter coil, 3...
Capacitor, 4... Ignition coil, 7... Thyristor, 8... Ignition position control circuit, 9... Control power supply circuit, 10... Thyristor, 11, 13, 14...
Diode, 12...First capacitor, 15...
...Second capacitor, 19...Transistor, 2
0...Zener diode. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

An exciter coil is used to induce an alternating current voltage in synchronization with the rotation of the internal combustion engine, and the output of one half cycle of this exciter coil is used as the ignition energy source, and the primary current of the ignition coil is suddenly changed by the operation of a semiconductor switch. An ignition control circuit that induces a high voltage for ignition in a secondary coil, a plurality of load circuits, and a control power source that supplies power for operating the plurality of load circuits with the output of the other half cycle of the exciter coil. In the internal combustion engine ignition device comprising a circuit, the control power supply circuit includes:
a thyristor connected in parallel to both ends of the exciter coil in an orientation that allows conduction during the other half cycle of the exciter coil; a first and second capacitor; and an output of the exciter coil during the other half cycle; a first charging circuit that charges the first capacitor to one polarity; a second charging circuit that charges the second capacitor to one polarity using the terminal voltage of the first capacitor;
A constant voltage circuit that makes the terminal voltage of the second capacitor a constant voltage, and a trigger circuit that gives an ignition signal to the thyristor when the terminal voltage of the second capacitor reaches a set value, An engine ignition system characterized in that a voltage across the second capacitor is applied to power supply terminals of the plurality of load circuits.