JPS6354504U

JPS6354504U -

Info

Publication number: JPS6354504U
Application number: JP15046386U
Authority: JP
Priority date: 1986-09-30
Filing date: 1986-09-30
Publication date: 1988-04-12

Description

[Brief explanation of the drawing]

第１図はこの考案の電子制御シヨツクアブソー
バ装置の基本構成を示すブロツク図、第２図はこ
の考案の実施例の配置関係を示す全体斜視図、第
３図はその実施例の構成図、第４図はこの考案に
適用される減衰力可変シヨツクアブソーバの一例
を示す縦断面図、第５図は第３図の駆動回路の詳
細を示す回路図、第６図は第５図の部位ａ〜ｃの
電圧波形図、第７図はマイクロコンピユータにお
いて実行される処理の手順を示すフローチヤート
、第８図及び第９図は上記実施例の動作を説明す
るためのタイムチヤート、第１０図は相対変位周
波数とハード側減衰力との関係を示す図、第１１
図は車両の１自由度の簡易モデルを示す図である
。２ａ〜２ｄ……減衰力可変シヨツクアブソーバ
、３ａ〜３ｄ……相対変位センサ、４ａ〜４ｄ…
…励磁コイル、５……制御装置、６……マイクロ
コンピユータ、９……駆動回路、１１……シリン
ダチユーブ、１２……ピストンロツド、１３……
ピストン、１５，１７……流体通路、１６……中
心開口、１８……透孔、１９……スプール、２０
……復帰スプリング、２１……プランジヤ、２５
……検出コイル。 Fig. 1 is a block diagram showing the basic configuration of the electronically controlled shock absorber device of this invention, Fig. 2 is an overall perspective view showing the arrangement of an embodiment of this invention, and Fig. 3 is a configuration diagram of the embodiment. FIG. 4 is a longitudinal sectional view showing an example of a variable damping force shock absorber applied to this invention, FIG. 5 is a circuit diagram showing details of the drive circuit shown in FIG. 3, and FIG. FIG. 7 is a flowchart showing the procedure of processing executed in the microcomputer, FIGS. 8 and 9 are time charts for explaining the operation of the above embodiment, and FIG. 10 is a relative Diagram showing the relationship between displacement frequency and hard side damping force, No. 11
The figure shows a simple model of a vehicle with one degree of freedom. 2a to 2d... variable damping force shock absorber, 3a to 3d... relative displacement sensor, 4a to 4d...
... Excitation coil, 5 ... Control device, 6 ... Microcomputer, 9 ... Drive circuit, 11 ... Cylinder tube, 12 ... Piston rod, 13 ...
Piston, 15, 17...Fluid passage, 16...Center opening, 18...Through hole, 19...Spool, 20
... Return spring, 21 ... Plunger, 25
...Detection coil.

Claims

[Scope of utility model registration request]

A damping force variable shock absorber capable of changing damping force continuously or stepwise between a soft side and a hard side; Relative displacement detection means for detecting relative displacement between sprung and unsprung parts of a vehicle; and the relative displacement relative displacement change direction determining means for determining whether the relative displacement is changing away from or approaching the relative displacement based on the relative displacement detected by the detection means; Based on the relative displacement detected by the detection means, when the frequency of the relative displacement is equal to or higher than the sprung mass resonance frequency, the damping force on the hard side is set to be smaller as the frequency increases, so that the frequency becomes the sprung mass resonance. hard side damping force setting means for setting the hard side damping force to be equal to or larger than the hard side damping force when the sprung mass resonance frequency is equal to or higher than the sprung mass resonance frequency; As a result of the determination, when the relative displacement is changing away from the neutral position of the relative displacement, the damping force is switched to the soft side, and when the relative displacement is changing towards the neutral side, the damping force is set to the hard side damping force. An electronically controlled shock absorber device comprising a switching means for switching to a hard side damping force set by the means.