JPH0282610U

JPH0282610U -

Info

Publication number: JPH0282610U
Application number: JP16267288U
Authority: JP
Priority date: 1988-12-15
Filing date: 1988-12-15
Publication date: 1990-06-26

Description

[Brief explanation of drawings]

第１図は本考案の一実施例としての車高調整式
サスペンシヨンの制御装置の要部の回路図、第２
図は同上制御装置の装着される油圧回路、第３図
は第２図中の電磁弁の断面図、第４図は同上装置
の車高制御信号等の波形図、第５図は車高制御信
号とデユーテイ比との特性線図、第６図は駆動電
流とアクチユエータ圧としての油圧の特性線図、
第７図は従来装置の制御手段の回路図、第８図は
差分電圧−デユーテイ比の特性線図、第９図はデ
ユーテイ比−車体重量の特性線図である。１……アクチユエータ、２……電磁弁、４……
制御手段、５……車高センサ、３８……増幅回路
、３９……コントロール回路、４１……車高制御
信号算出回路。 Figure 1 is a circuit diagram of the main parts of a control device for a vehicle height adjustable suspension as an embodiment of the present invention;
The figure shows the hydraulic circuit in which the above control device is installed, Fig. 3 is a sectional view of the solenoid valve in Fig. 2, Fig. 4 is a waveform diagram of vehicle height control signals, etc. of the above device, and Fig. 5 shows the vehicle height control. Characteristic diagram of signal and duty ratio, Figure 6 is characteristic diagram of drive current and oil pressure as actuator pressure,
FIG. 7 is a circuit diagram of the control means of the conventional device, FIG. 8 is a characteristic diagram of differential voltage versus duty ratio, and FIG. 9 is a characteristic diagram of duty ratio versus vehicle weight. 1... Actuator, 2... Solenoid valve, 4...
Control means, 5...Vehicle height sensor, 38...Amplification circuit, 39...Control circuit, 41...Vehicle height control signal calculation circuit.

Claims

[Scope of utility model registration request]

The amount of working fluid supplied and discharged to the vehicle height adjustment actuator is controlled by a solenoid valve, and the control means for the solenoid valve controls the vehicle height based on a designated target vehicle height signal and an actual vehicle height signal from the vehicle height sensor. In a control device for a vehicle height adjustable suspension configured to obtain a signal and drive the solenoid valve with a duty output of a duty ratio based on the vehicle height control signal,
The control means is configured to compare the actual vehicle height signal and the target vehicle height signal to obtain a binary signal, integrate and smooth the binary signal, and convert it into a vehicle height control signal. Control device for vehicle height adjustable suspension.