JPS5890371U

JPS5890371U - Starter protection device for internal combustion engines

Info

Publication number: JPS5890371U
Application number: JP18486281U
Authority: JP
Inventors: 湯川　秀樹
Original assignee: 国産電機株式会社
Priority date: 1981-12-14
Filing date: 1981-12-14
Publication date: 1983-06-18
Also published as: JPS6224049Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す接続図、第２図Ａ乃至り
は第１図の実施例における回転数検出回路の各部の信号
波形を示した線図、第３図はＦＥＴの特性の一例を示し
た線図、第４図乃至第６図はそれぞれ本考案の他の異な
る実施例を示す接続図である。１・・・・・・電源装置、２・・・・・・バッテリ、３
・・曲信号源回路、４・・・・・・定電圧回路、５・・
四回転数検出回路、６・・・・・・機関始動装置、Ｃ２
・・・・・・第１のコンデンサ、Ｃ３・・・・・・第２
のコンデンサ、Ｄ２．Ｄ３・・・・・・ダイオード、Ｒ
３・・・・・・放電抵抗、Ｆ２・・・・・・電界効果ト
ランジスタ、ｚ２・・曲ツェナーダイオード、Ｓ亡曲サ
イリスタ、ＭＳ□・・−［磁スイッチ、ｍｓ□・・曲電
磁スイッチＭＳ１の接点、ＭＳ２・・曲電磁スイッチ、
ｍＳ２・・・・・・電磁スイッチＭＳ２の接点、Ｍ・・
・・・・スタータモータ。Fig. 1 is a connection diagram showing an embodiment of the present invention, Fig. 2 A to Fig. 2 are diagrams showing signal waveforms of each part of the rotation speed detection circuit in the embodiment of Fig. 1, and Fig. 3 is a characteristic of the FET. FIGS. 4 to 6 are connection diagrams showing other different embodiments of the present invention. 1...Power supply device, 2...Battery, 3
...Music signal source circuit, 4... Constant voltage circuit, 5...
Four rotation speed detection circuit, 6...Engine starting device, C2
...First capacitor, C3...Second
capacitor, D2. D3...Diode, R
3... Discharge resistance, F2... Field effect transistor, z2... Curved Zener diode, S bent thyristor, MS□...-[Magnetic switch, ms□... Curved electromagnetic switch MS1 Contact, MS2... curved electromagnetic switch,
mS2... Contact of electromagnetic switch MS2, M...
...Starter motor.

Claims

[Scope of utility model registration request]

a rotation speed detection circuit for detecting the rotation speed of an internal combustion engine; an electromagnetic switch for opening and closing current to a starter motor for starting the engine; A starter protection device for an internal combustion engine, comprising an excitation current switching means that opens and self-holds when a detection signal reaches a set value, an alternator that rotates in synchronization with the internal combustion engine, and an output of the alternator. A signal source circuit that converts a voltage into a rectangular wave voltage is provided, and the rotation speed detection circuit includes a first capacitor charged to one polarity by the output voltage of the signal source circuit, and the first capacitor. a second capacitor that is charged to one polarity by the electric charge of the second capacitor, a discharge resistor that is connected in parallel to the second capacitor, and a voltage across the second capacitor that is applied between the gate and the source and the drain of the second capacitor. 1. A starter protection device for an internal combustion engine, comprising a field effect transistor connected to a DC power source through a resistor, wherein a voltage between the gate and source of the field transistor is used as the detection signal.