JPS6425964U - - Google Patents
Info
- Publication number
- JPS6425964U JPS6425964U JP12084087U JP12084087U JPS6425964U JP S6425964 U JPS6425964 U JP S6425964U JP 12084087 U JP12084087 U JP 12084087U JP 12084087 U JP12084087 U JP 12084087U JP S6425964 U JPS6425964 U JP S6425964U
- Authority
- JP
- Japan
- Prior art keywords
- wheel steering
- rear wheel
- detection means
- pressure
- steering actuator
- 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
- 230000005856 abnormality Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims 1
Landscapes
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
第１図は本考案一実施例の四輪操舵装置示す全
体図、第２図は実施例装置の異常検出手段の作動
流れを示すフローチヤートである。
１４……前輪、２０……後輪操舵アクチユエー
タ、２１……右圧力室、２２……左圧力室、２７
……後輪用ポンプ（液圧供給源）、２８……後輪
、３０……切換弁、４０……コントローラ、５０
……差圧スイツチ（圧力差検出手段）、６０……
異常検出手段、ｊ……差圧信号、ｒ……右操舵指
令信号、ｌ……左操舵指令信号。
FIG. 1 is an overall view of a four-wheel steering system according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation flow of the abnormality detection means of the embodiment of the system. 14... Front wheel, 20... Rear wheel steering actuator, 21... Right pressure chamber, 22... Left pressure chamber, 27
...Rear wheel pump (hydraulic pressure supply source), 28...Rear wheel, 30...Switching valve, 40...Controller, 50
...Differential pressure switch (pressure difference detection means), 60...
Abnormality detection means, j...Differential pressure signal, r...Right steering command signal, l...Left steering command signal.
Claims (1)
圧力室の液圧差に基き駆動して後輪を左右に操舵
する後輪操舵アクチユエータと、 前輪の操舵に基き後輪を操舵すべく、前記切換
弁に操舵指令信号を出力して前記後輪操舵用アク
チユエータに圧力を供給するコントローラと、 前記後輪操舵アクチユエータの異常を検出する
異常検出手段と、を備えた四輪操舵装置において
、 前記左右圧力室の差圧を検知し差圧信号を出力
する圧力差検出手段を設け、 前記異常検出手段を、前記操舵指令信号と差圧
信号を入力し、後輪が中立位置に制御されている
のに後輪操舵アクチユエータの左右両室に圧力差
が生じたときを異常として検出する異常検出手段
としたことを特徴とする四輪操舵装置。[Scope of Claim for Utility Model Registration] A rear wheel steering actuator connected to a hydraulic pressure supply source via a switching valve and driven based on the hydraulic pressure difference between left and right pressure chambers to steer the rear wheels left and right; a controller that outputs a steering command signal to the switching valve and supplies pressure to the rear wheel steering actuator in order to steer the rear wheels based on the steering wheel; and an abnormality detection means that detects an abnormality in the rear wheel steering actuator. In the four-wheel steering system, pressure difference detection means is provided for detecting a pressure difference between the left and right pressure chambers and outputting a differential pressure signal, and the abnormality detection means is configured to input the steering command signal and the differential pressure signal to the rear wheel. 1. A four-wheel steering system, comprising an abnormality detection means that detects as an abnormality when a pressure difference occurs between the left and right chambers of a rear wheel steering actuator even though the rear wheel steering actuator is controlled to a neutral position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12084087U JPH0625411Y2 (en) | 1987-08-06 | 1987-08-06 | Four-wheel steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12084087U JPH0625411Y2 (en) | 1987-08-06 | 1987-08-06 | Four-wheel steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425964U true JPS6425964U (en) | 1989-02-14 |
| JPH0625411Y2 JPH0625411Y2 (en) | 1994-07-06 |
Family
ID=31367311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12084087U Expired - Lifetime JPH0625411Y2 (en) | 1987-08-06 | 1987-08-06 | Four-wheel steering system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625411Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016142352A (en) * | 2015-02-03 | 2016-08-08 | 株式会社タダノ | Hydraulic motor control device and work vehicle |
-
1987
- 1987-08-06 JP JP12084087U patent/JPH0625411Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016142352A (en) * | 2015-02-03 | 2016-08-08 | 株式会社タダノ | Hydraulic motor control device and work vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0625411Y2 (en) | 1994-07-06 |
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