JPS5816355U

JPS5816355U - Ignition system for two-stroke internal combustion engine

Info

Publication number: JPS5816355U
Application number: JP11014981U
Authority: JP
Inventors: 田村　龍生; 俊雄田中; 康生伊藤
Original assignee: 株式会社デンソー
Priority date: 1981-07-23
Filing date: 1981-07-23
Publication date: 1983-02-01

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図Ａは本考案装置の一実施例を示す電気回路図、第
１図Ｂは第１図Ａ図示装置における電磁式ピックアップ
を示す平面図、第２図は第１図Ａ図示装置の作動説明に
供する各部波形図ミ第３図　　　′は第１図Ａ図示装置
の作動説明に供する特性図、第４図は第１図Ａ図示装置
の作動説明に供するディストリビュータ配電部の構造を
示′す模式平面図、第５図は第１図Ａ図示装置の作動説
明に供するピックアップコイル出力波形図、第６図は従
来装置の作動説明に供する各部波形図である。１・・・シグナルロータ、２・・・電磁式ピックアップ
、３・・・点火コイル、３ａ・・・１次コイル、３ｂ・
・・２次コイル、５・・・点火回路、７・・・スタータ
マグネットスイッチ、８・・・スタータモータ、９・・
・レベル可変回路。FIG. 1A is an electric circuit diagram showing one embodiment of the device of the present invention, FIG. 1B is a plan view showing an electromagnetic pickup in the device shown in FIG. 1A, and FIG. 2 is the operation of the device shown in FIG. 1A. Figure 3' is a characteristic diagram for explaining the operation of the device shown in Figure 1A, and Figure 4 shows the structure of the distributor power distribution section, which is used to explain the operation of the device shown in Figure 1A. A schematic plan view, FIG. 5 is a pickup coil output waveform diagram to explain the operation of the device shown in FIG. 1A, and FIG. 6 is a waveform diagram of various parts to explain the operation of the conventional device. DESCRIPTION OF SYMBOLS 1... Signal rotor, 2... Electromagnetic pickup, 3... Ignition coil, 3a... Primary coil, 3b...
...Secondary coil, 5...Ignition circuit, 7...Starter magnet switch, 8...Starter motor, 9...
- Level variable circuit.

Claims

[Scope of utility model registration request]

A signal rotor rotates periodically with the rotation of a two-stroke internal combustion engine, and the rotation of this signal rotor is detected to generate a half-wave output of one polarity with a steep rise and a gentle fall, and a half-wave output with a steep rise and a gentle fall. an ignition coil having a primary coil and a secondary coil, and a half-wave output of the other polarity of the electromagnetic pickup during normal rotation; A threshold level is set at a position where the half-wave output of the other polarity turns on and off in response to a predetermined value. A two-stroke internal combustion engine that is equipped with an ignition circuit that cuts off the primary current by cutting off the primary current when the engine starts up, and a variable level circuit that moves the threshold level of this ignition circuit in a direction that reduces the delay in ignition timing when the engine starts. Ignition device.