JPS634706U

JPS634706U -

Info

Publication number: JPS634706U
Application number: JP9852886U
Authority: JP
Priority date: 1986-06-27
Filing date: 1986-06-27
Publication date: 1988-01-13
Anticipated expiration: 2001-06-27
Also published as: JP2553162Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の第１実施例を示す構成図、
第２図はこの考案に適用し得る圧力制御弁の一例
を示す断面図、第３図は第２図の圧力制御弁の指
令値と出力油圧との関係を示す特性図、第４図は
第１実施例の動作の説明に供する時間に対する指
令値Ｖ_２、油圧源圧力ＰＬ及び車高Ｈの関係を示
す説明図、第５図は第１実施例の動作の説明に供
する各部の信号波形図、第６図はこの考案の第２
実施例を示すブロツク図、第７図はマイクロコン
ピユータのメインプログラムの処理手順を示すフ
ローチヤート、第８図はマイクロコンピユータの
タイマ割込処理を示すフローチヤート、第９図は
従来の能動型サスペンシヨンを示す構成図、第１
０図は従来例における第４図に対応する説明図で
ある。図中、１は油圧シリンダ、１ｃは圧力室、２は
車体側部材、３は車輪側部材、１２は圧力制御弁
、１９はスプール、２２は比例ソレノイド、２８
は圧力センサ（作動開始時検出手段）、２９は上
下加速度検出器、３０は制御装置、３１は積分回
路、３２はローパスフイルタ（オフセツト圧指令
値発生手段）、３３は加算器、３４はマイクロコ
ンピユータである。 FIG. 1 is a configuration diagram showing the first embodiment of this invention.
Fig. 2 is a sectional view showing an example of a pressure control valve that can be applied to this invention, Fig. 3 is a characteristic diagram showing the relationship between the command value and output oil pressure of the pressure control valve shown in Fig. 2, and Fig. 4 is a sectional view showing an example of a pressure control valve applicable to this invention. An explanatory diagram showing the relationship between the command value V ₂ , hydraulic pressure source pressure PL, and vehicle height H with respect to time to explain the operation of the first embodiment, and FIG. 5 is a signal waveform diagram of each part to explain the operation of the first embodiment. , Figure 6 shows the second part of this idea.
A block diagram showing the embodiment, FIG. 7 is a flowchart showing the processing procedure of the main program of the microcomputer, FIG. 8 is a flowchart showing the timer interrupt processing of the microcomputer, and FIG. 9 is a conventional active suspension. A configuration diagram showing the first
FIG. 0 is an explanatory diagram corresponding to FIG. 4 in the conventional example. In the figure, 1 is a hydraulic cylinder, 1c is a pressure chamber, 2 is a vehicle body side member, 3 is a wheel side member, 12 is a pressure control valve, 19 is a spool, 22 is a proportional solenoid, 28
29 is a pressure sensor (detection means at the start of operation), 29 is a vertical acceleration detector, 30 is a control device, 31 is an integrating circuit, 32 is a low-pass filter (offset pressure command value generation means), 33 is an adder, and 34 is a microcomputer. It is.

Claims

[Scope of utility model registration request]

A fluid pressure cylinder interposed between each wheel and the vehicle body, and a pressure control valve interposed between the fluid pressure cylinder and a fluid pressure source to control the operating pressure of the fluid pressure cylinder according to a command value. and a control device that outputs the command value to the pressure control valve, and the control device is configured to output a predetermined offset pressure to the pressure control valve when the fluid pressure source is in operation. The active suspension is configured to output a command value including a pressure command value, and includes an operation start detection means for detecting the start of operation of the fluid pressure source, and the control device is configured to detect at least the start of operation of the fluid pressure source. The active type is characterized by comprising an offset pressure command value generation means for generating an offset pressure command value with a predetermined time constant greater than the time constant of the pressure control valve when the time detection means detects the start of operation. Suspension.