JPS5833787U

JPS5833787U - Glow plug temperature detection input circuit

Info

Publication number: JPS5833787U
Application number: JP12897381U
Authority: JP
Inventors: 出水　昭
Original assignee: 三菱電機株式会社
Priority date: 1981-08-28
Filing date: 1981-08-28
Publication date: 1983-03-04
Also published as: JPS6228709Y2

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図は従来のグロープラグの温度検出入力装置を示す
回路図、第２図はこの考案のグロープラグの温度検出入
力回路の一実施例を示す回路図である。　　　　　　　
　　　　　　　　′１・・・キースイッチ、２・・・バ
ッテリ、３・・・グローリレー、４・・・グロープラグ
、５・・・コントローラ、６・・・定電流回路、７・・
・定電圧回路、８・・・温度制御回路、９・・・出力回
路、１０・・・制御回路、１１・・・温度比較回路、１
２・・・反転増幅入力回路、Ｒ１−Ｒ１１゜１３〜１９
，２２．２３・・・抵抗、Ｄ□、Ｄ２．２０゜２４・・
・ダイオード、Ｑ１〜Ｑ４・・・トランジスタ。なお、
図中同一または相当部分を示す。FIG. 1 is a circuit diagram showing a conventional temperature detection input device for a glow plug, and FIG. 2 is a circuit diagram showing an embodiment of the temperature detection input circuit for a glow plug according to the present invention.
'1... Key switch, 2... Battery, 3... Glow relay, 4... Glow plug, 5... Controller, 6... Constant current circuit, 7...
- Constant voltage circuit, 8... Temperature control circuit, 9... Output circuit, 10... Control circuit, 11... Temperature comparison circuit, 1
2... Inverting amplification input circuit, R1-R11゜13~19
,22.23...Resistance, D□, D2.20°24...
・Diode, Q1-Q4...transistor. In addition,
Identical or corresponding parts are shown in the figures.

Claims

[Scope of utility model registration request]

A glow relay is installed in a glow plug that uses a resistance element with a large temperature coefficient of resistance as a heating element, and a circuit applies a predetermined voltage to the glow plug. There is a constant current circuit that flows a constant current during the open period and converts it into a voltage across the glow plug, and the on time of the glow relay is determined by the detected voltage obtained at both ends of the glow plug by this constant current circuit. At the same time, when the temperature detection wiring of the glow plug is disconnected, the power to the glow relay is forcibly turned off, and regardless of the effect on the constant voltage circuit due to turning on or off of the glow relay, the above A glow plug temperature detection input circuit consisting of a temperature control circuit that controls the output voltage of a constant voltage circuit to a constant level.