JPH01175404U - - Google Patents
Info
- Publication number
- JPH01175404U JPH01175404U JP7310188U JP7310188U JPH01175404U JP H01175404 U JPH01175404 U JP H01175404U JP 7310188 U JP7310188 U JP 7310188U JP 7310188 U JP7310188 U JP 7310188U JP H01175404 U JPH01175404 U JP H01175404U
- Authority
- JP
- Japan
- Prior art keywords
- damping force
- shock absorber
- value
- detecting
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013016 damping Methods 0.000 claims description 17
- 239000006096 absorbing agent Substances 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Fluid-Damping Devices (AREA)
Description
第１図は本考案の基本概念図、第２〜８図は本
考案に係る減衰力可変型液圧緩衝装置の一実施例
を示す図であり、第２図はそのシヨツクアブソー
バの全体構成を示す断面図、第３図はその要部断
面構成図、第４図はそのシステムの全体構成図、
第５図はその一部分の回路図、第６図はその作用
を説明するための図、第７図ａ，ｂはその減衰力
可変制御のプログラムを示すフローチヤート、第
８図はその作用を説明するための図である。
１……シヨツクアブソーバ、３……シリンダ、
４……ピストン、６０……第１の圧電素子（第１
の検出手段、第２の操作手段）、７０……減衰手
段（第１の操作手段、第２の操作手段）、９０…
…第２の圧電素子（第２の検出手段、第１の操作
手段）、１００……コントロールユニツト（制御
手段、旋回状態判別手段）、１０１……Ｉ／Ｏポ
ート、１１０……入力回路、１２０……演算回路
、１３０……駆動回路、１４０……駆動用電源回
路、１５０……操舵状態検出手段。
Fig. 1 is a basic conceptual diagram of the present invention, Figs. 2 to 8 are diagrams showing an embodiment of a variable damping force type hydraulic shock absorber according to the present invention, and Fig. 2 shows the overall structure of the shock absorber. 3 is a cross-sectional diagram of the main parts thereof, and FIG. 4 is a diagram of the overall configuration of the system.
Fig. 5 is a circuit diagram of a part of it, Fig. 6 is a diagram for explaining its operation, Fig. 7 a and b is a flowchart showing a program for variable damping force control, and Fig. 8 is an explanation of its operation. This is a diagram for 1...Shock absorber, 3...Cylinder,
4... Piston, 60... First piezoelectric element (first
detection means, second operating means), 70... damping means (first operating means, second operating means), 90...
...Second piezoelectric element (second detection means, first operation means), 100...Control unit (control means, turning state determination means), 101...I/O port, 110...Input circuit, 120 ... Arithmetic circuit, 130 ... Drive circuit, 140 ... Drive power supply circuit, 150 ... Steering state detection means.
Claims (1)
液圧を検出する第１の検出手段と、 (b) 減衰力可変型シヨツクアブソーバの伸側の
液圧を検出する第２の検出手段と、 (c) ステアリングホイールの操舵状態を検出す
る操舵状態検出手段と、 (d) 操舵状態の変化速度が所定値を超えたとき
、第１の検出手段および第２の検出手段の出力に
基づいて車両の旋回状態を判別する旋回状態判別
手段と、 (e) 車両が所定の旋回状態に移行すると４本の
シヨツクアブソーバのうち、圧縮される側の１本
以上の圧側減衰力および伸張される側の１本以上
の伸側減衰力を所定の高減衰力とするとともに、
該高減衰力の値を操舵状態検出手段の出力に基づ
いて決定し、所定の旋回状態が終了すると４本の
シヨツクアブソーバに対して順次、第１の検出手
段および第２の検出手段の出力から液圧の変化率
を求め、該変化率が極値となると、シヨツクアブ
ソーバを所定の高減衰力とするとともに、該高減
衰力の値を極値に応じて決定し、変化率が所定値
まで低下すると所定の低減衰力とするような制御
値を演算する制御手段と、 (f) 制御手段の出力に基づいて減衰力可変型シ
ヨツクアブソーバの圧側の減衰力を変える第１の
操作手段と、 (g) 制御手段の出力に基づいて減衰力可変型シ
ヨツクアブソーバの伸側の減衰力を変える第２の
操作手段と、 を備えたことを特徴とする減衰力可変型液圧緩
衝装置。[Claims for Utility Model Registration] (a) A first detection means for detecting hydraulic pressure on the pressure side of a variable damping force type shock absorber; (b) For detecting hydraulic pressure on the rebound side of a variable damping force type shock absorber. (c) a steering state detecting means for detecting the steering state of the steering wheel; (d) when the rate of change in the steering state exceeds a predetermined value, the first detecting means and the second detecting means; (e) compression side damping of one or more of the four shock absorbers that is compressed when the vehicle enters a predetermined turning state; The force and one or more extension side damping forces on the stretched side are set to a predetermined high damping force, and
The value of the high damping force is determined based on the output of the steering state detection means, and when a predetermined turning state is completed, the value of the high damping force is sequentially applied to the four shock absorbers from the output of the first detection means and the second detection means. The rate of change in hydraulic pressure is determined, and when the rate of change reaches an extreme value, the shock absorber is set to a predetermined high damping force, the value of the high damping force is determined according to the extreme value, and the rate of change reaches a predetermined value. (f) a first operating means for changing the damping force on the compression side of the variable damping force type shock absorber based on the output of the control means; (g) A variable damping force hydraulic shock absorber comprising: second operating means for changing the damping force on the extension side of the variable damping force shock absorber based on the output of the control means.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310188U JPH0714008Y2 (en) | 1988-05-31 | 1988-05-31 | Variable damping force hydraulic shock absorber |
| GB8912368A GB2220624B (en) | 1988-05-31 | 1989-05-30 | Hydraulic shock absorber |
| US07/359,091 US4948163A (en) | 1988-05-31 | 1989-05-30 | Damping characteristics variable hydraulic shock absorber for automotive suspension system with vehicular attitude suppressing capability |
| DE3917716A DE3917716C2 (en) | 1988-05-31 | 1989-05-31 | Suspension system for motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310188U JPH0714008Y2 (en) | 1988-05-31 | 1988-05-31 | Variable damping force hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01175404U true JPH01175404U (en) | 1989-12-13 |
| JPH0714008Y2 JPH0714008Y2 (en) | 1995-04-05 |
Family
ID=31298249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7310188U Expired - Lifetime JPH0714008Y2 (en) | 1988-05-31 | 1988-05-31 | Variable damping force hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0714008Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010215153A (en) * | 2009-03-18 | 2010-09-30 | Fuji Heavy Ind Ltd | Suspension control device |
-
1988
- 1988-05-31 JP JP7310188U patent/JPH0714008Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010215153A (en) * | 2009-03-18 | 2010-09-30 | Fuji Heavy Ind Ltd | Suspension control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0714008Y2 (en) | 1995-04-05 |
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