JPH01165380U

JPH01165380U -

Info

Publication number: JPH01165380U
Application number: JP6154688U
Authority: JP
Priority date: 1988-05-10
Filing date: 1988-05-10
Publication date: 1989-11-20
Anticipated expiration: 2003-05-10
Also published as: JPH0619890Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の比例ソレノイドバ
ルブ通電回路を示す回路図、第２図は第１の比例
ソレノイドバルブ通電回路が出力する駆動電流の
一例を示す波形図、第３図は第８図の比例ソレノ
イドバルブの駆動電流―開弁量を示す特性図、第
４図は第１図の比例ソレノイドバルブ通電回路の
処理手順を示すフローチヤート、第５図は第４図
のサブルーチンを示すフローチヤート、第６図は
従来の比例ソレノイドバルブ通電回路の一例を示
す回路図、第７図は同比例ソレノイドバルブ通電
回路が適用されるサスペンシヨン装置を示す模式
図、第８図は同サスペンシヨン装置の比例ソレノ
イドバルブを示す断面図である。２…サスペンシヨン装置、３…比例ソレノイド
バルブ、９…ハウジング、１０…スプール、１１
ａ，１１ｂ…ソレノイド、６０…比例ソレノイド
バルブ通電回路、７０…制御装置、７１…入力手
段、７３…弁開度設定手段、７４…切換制御手段
、７５…判定手段、７６…中立状態設定手段、７
７…切換指示手段、７８…ＣＰＵ。 FIG. 1 is a circuit diagram showing a proportional solenoid valve energizing circuit according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing an example of the drive current output by the first proportional solenoid valve energizing circuit, and FIG. Figure 8 is a characteristic diagram showing drive current of the proportional solenoid valve vs. valve opening amount, Figure 4 is a flowchart showing the processing procedure of the proportional solenoid valve energization circuit of Figure 1, and Figure 5 is a subroutine of Figure 4. Flowchart, Fig. 6 is a circuit diagram showing an example of a conventional proportional solenoid valve energization circuit, Fig. 7 is a schematic diagram showing a suspension device to which the proportional solenoid valve energization circuit is applied, and Fig. 8 is a schematic diagram of a suspension device to which the proportional solenoid valve energization circuit is applied. FIG. 3 is a cross-sectional view of the proportional solenoid valve of the device. 2...Suspension device, 3...Proportional solenoid valve, 9...Housing, 10...Spool, 11
a, 11b... Solenoid, 60... Proportional solenoid valve energizing circuit, 70... Control device, 71... Input means, 73... Valve opening setting means, 74... Switching control means, 75... Judgment means, 76... Neutral state setting means, 7
7...Switching instruction means, 78...CPU.

Claims

[Scope of utility model registration request]

A spool and a spring for maintaining the spool in a neutral state are installed in the hollow part of the housing,
In a proportional solenoid valve energization circuit for driving a proportional solenoid valve, which is formed by bringing plungers of a pair of proportional solenoids connected to both ends of a housing into contact with the spool, a switching circuit that switches and supplies driving current to the pair of solenoid valves. and a switching control signal that switches the switching circuit to select one solenoid necessary for the requested valve opening based on a valve opening request signal corresponding to the valve opening of the proportional solenoid valve, and the drive current. a control device that outputs a valve opening control signal that sets the magnitude of the valve opening, and the control device includes a determining means for determining whether the valve is opened or stopped based on the valve opening request signal; neutral drive means for outputting a neutral drive signal that generates a drive current sufficient to displace the spool to a neutral position in response to a valve opening stop signal; and after generation of the neutral drive signal, the switching circuit is activated at regular intervals. 1. A proportional solenoid valve energization circuit comprising: alternating switching means for outputting a switching control signal to the switching circuit at fixed time intervals in order to perform switching operations alternately.