JPS60137280U

JPS60137280U - Solenoid control valve drive device

Info

Publication number: JPS60137280U
Application number: JP2415184U
Authority: JP
Inventors: 正宏本間; 建郎高橋
Original assignee: 日産自動車株式会社
Priority date: 1984-02-22
Filing date: 1984-02-22
Publication date: 1985-09-11

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 drawings]

第１図は、この考案を減衰力可変ショックアブソーバに
適用した場合の一実施例を示す断面図、　　　゛第２図
は、減衰力可変ショックアブソーバのピストン部の拡大
断面図、第３図は、駆動回路を一実施例を示すブ冶ツク
図、第４図は、この考案の動作の説明に供する各部の信
号波形図である。１・・・減衰力可変ショックアブソーバ、１２・・・電
磁ソレノイド、１２ａ・・・励磁コイル、１３・・・電
磁制御弁、１５・・・駆動回路、１７・・・リレー常閉
接点、１７ａ・・・リレーコイル、１８・・・駆動トラ
ンジスタ、１９・・・バッテリー、２０・・・パルス幅
変調回路、２２・・・指令回路、２３・・・三角波発生
回路、２４・・・比較回路、２５・・・トランジスタ駆
動回路、２６・・・異常動作検出回路、２８・・・電流
検出回路、２９・・・電圧検出回路、３０・・・異常動
作判別回路、３１・・・停止制御回路。Fig. 1 is a sectional view showing an embodiment of this invention applied to a variable damping force shock absorber; Fig. 2 is an enlarged sectional view of the piston portion of the variable damping force shock absorber; Fig. 3 is an enlarged sectional view of the piston portion of the variable damping force shock absorber; A block diagram showing one embodiment of the drive circuit, and FIG. 4 are signal waveform diagrams of various parts to explain the operation of this invention. DESCRIPTION OF SYMBOLS 1... Variable damping force shock absorber, 12... Electromagnetic solenoid, 12a... Excitation coil, 13... Solenoid control valve, 15... Drive circuit, 17... Relay normally closed contact, 17a... ... Relay coil, 18... Drive transistor, 19... Battery, 20... Pulse width modulation circuit, 22... Command circuit, 23... Triangular wave generation circuit, 24... Comparison circuit, 25 ...Transistor drive circuit, 26...Abnormal operation detection circuit, 28...Current detection circuit, 29...Voltage detection circuit, 30...Abnormal operation determination circuit, 31...Stop control circuit.

Claims

[Scope of utility model registration request]

Regarding the drive device of the electromagnetic control valve inserted in the fluid pressure circuit,
a pulse width modulation circuit that chopper-controls a drive current to the electromagnetic control valve using a pulse width modulation signal obtained by pulse width modulating a set level signal; a voltage detection circuit that detects a voltage value supplied to the electromagnetic control valve; A current detection circuit that detects the current value supplied to the electromagnetic control valve, a level display signal indicating the presence of the set level signal, and output signals of the voltage detection circuit and the current detection circuit are input, and electromagnetic control is performed based on these. An abnormal operation detection circuit having an abnormal operation discrimination circuit that detects abnormal operation of the valve, and a stop control circuit that stops the opening/closing operation of the electromagnetic control valve in response to an abnormal operation detection signal from the abnormal operation detection circuit. A driving device for an electrohydraulic control valve, characterized in that: