JPS61175174A - Hydraulic steering device - Google Patents
Hydraulic steering deviceInfo
- Publication number
- JPS61175174A JPS61175174A JP60013497A JP1349785A JPS61175174A JP S61175174 A JPS61175174 A JP S61175174A JP 60013497 A JP60013497 A JP 60013497A JP 1349785 A JP1349785 A JP 1349785A JP S61175174 A JPS61175174 A JP S61175174A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- capacity
- cylinder
- throttle valve
- pressure
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は主として自動車に適用される液圧式操向装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic steering system mainly applied to automobiles.
（従来の技術）
従来この種操向装置として圧液を車両の操向機構に連結
したシリンダに送り、ハンドル操作の力を軽減するよう
にしたものが知られている。(Prior Art) Conventionally, as this type of steering device, one is known in which pressurized fluid is sent to a cylinder connected to a steering mechanism of a vehicle to reduce the force required to operate a steering wheel.
この場合、操向機構には車両の走行用原動機に連結した
ポンプから圧液が送られるが、操向機構には車両の走行
中は多くの圧液を送る必要がなく、むしろ走行中の急ハ
ンドルを防止するために少ない量の圧液が送られること
が好ましい。In this case, pressure fluid is sent to the steering mechanism from a pump connected to the prime mover of the vehicle, but there is no need to send much pressure fluid to the steering mechanism while the vehicle is running; Preferably, a small amount of pressurized fluid is delivered to prevent handles.
原動機の高回速中はポンプから送られる圧液の量が多く
なるので、例えば圧液回路に特公昭５８−９３０６号公
報に見られるような流量制御装置を設け、これで原動機
回転数が一定回転数を越えるようになると次第に操向機
構に送られる液量を減少させるように制御することが提
案された。該流量制御装置は原動機の回転数の上昇に伴
い液量が増大する固定容量形ポンプの圧液回路に設けら
れたとき有効に作動する。When the prime mover is running at a high speed, the amount of pressure fluid sent from the pump increases, so for example, a flow rate control device such as that seen in Japanese Patent Publication No. 58-9306 is installed in the pressure fluid circuit, and this makes it possible to keep the prime mover rotation speed constant. It has been proposed to control the amount of liquid sent to the steering mechanism to gradually decrease when the rotational speed is exceeded. The flow rate control device operates effectively when installed in a pressure fluid circuit of a fixed displacement pump in which the amount of fluid increases as the rotational speed of the prime mover increases.
また従来、可変容量形ポンプから吐出される液量を制御
する手段として第１図示のように可変容量形ポンプａの
容量を１対のシリンダｂ１Ｃにより制御可能とし、その
圧液回路ｄに設けた絞り弁ｅの前後の圧力差により作動
するサーボ弁ｆを介して一方のシリンダｂにポンプ容量
を小さく制御するための圧液を該回路ｄから導入し、他
方のシリンダＣには該回路ｄから直接該ポンプａの容量
を大きくするように圧液を導き、第２図の曲線ｑのよう
に液量を制御することも行なわれている。Conventionally, as a means for controlling the amount of liquid discharged from a variable displacement pump, as shown in the first diagram, the capacity of a variable displacement pump a can be controlled by a pair of cylinders b1C, which are provided in a pressure liquid circuit d. Pressure fluid for controlling the pump capacity to be small is introduced into one cylinder b from circuit d through a servo valve f operated by the pressure difference before and after the throttle valve e, and into the other cylinder C from circuit d. It is also possible to directly introduce pressure fluid to increase the capacity of the pump a and control the fluid volume as shown by curve q in FIG.
（発明が解決しようとする問題点）
第１図示のような制御では液量を特公昭５８−９３０６
号公報のもののように原動機回転数が一定回転以上にな
ったときに液量を減少させる制御は行なえない。また特
公昭５８−９３０６号のものはポンプからの液量をタン
クへと排除するのでポンプの一液量に無駄が生じ、無効
に原動鳴動力が消費されて好ましくない。(Problem to be solved by the invention) In the control shown in the first diagram, the liquid volume is
It is not possible to control the amount of liquid to be reduced when the rotational speed of the prime mover exceeds a certain rotational speed, as in the case of the patent publication. Furthermore, the system of Japanese Patent Publication No. 58-9306 discards the liquid volume from the pump into the tank, which is undesirable because the pump liquid volume is wasted and the driving force is wasted ineffectively.
本発明は原動機回転数が増大すると次第に車両操向機構
に送る液量を減じるようにポンプを制御し、原動機動力
を損失を排除することを目的とするものである。An object of the present invention is to control the pump so that the amount of liquid sent to the vehicle steering mechanism is gradually reduced as the rotational speed of the prime mover increases, thereby eliminating loss of prime mover power.
（問題点を解決するための手段）
本発明は、車両操向機構に、回転数が可変される原動機
に連結した可変容量形ポンプから圧液を供給するように
したものに於いて、該ポンプのポンプ容量を変化させる
容量制御装置と該ポンプの液量調整用絞り弁とを、該原
動機の回転数が増大して該絞り弁を流れる液量が設定優
まで増大すると該容量制御装置の作動により該絞り面積
を減少すべく作動するように互に連結するようにした。(Means for Solving the Problems) The present invention provides a vehicle steering mechanism with pressure fluid supplied from a variable displacement pump connected to a prime mover whose rotational speed is variable. A capacity control device for changing the pump capacity of the pump and a throttle valve for adjusting the liquid volume of the pump are operated. The apertures are connected to each other so as to operate to reduce the aperture area.
（作 用）
原動機が駆動されその回転数が増大すると、容」制御装
置の補助シリンダによりポンプ容量を最大として待機し
ていた可変容量ポンプからその回転数の増大に応じて次
第に増大する液量が吐出される。吐出される圧液は圧液
回路の流量調整用絞り弁を介して車両操向機構へと送ら
れるが、その液量の増大によって該絞り弁の前後に一定
以上の差圧が発生するとサーボ弁が作動して圧液回路の
液圧を容量制御装置のコントロールシリンダに導く。該
コントロールシリンダのピストン面積は補助シリンダの
ピストン面積よりも大きく形成され、各シリンダのピス
トンはポンプの斜板等の移動自在の容ｆｉｌ＃Ｉ御部材
を介して互に連結されるものであることは従来のものと
同様であり、該コントロールシリンダはこれに液圧が作
用すると補助シリンダの力に抗して容量制御部材をポン
プ容量が少なくなるように傾動させる。ポンプ容量の減
少で圧液回路の液口が減少すると絞り弁の前後の差圧が
小さくなるので従来のものではサーボ弁は戻ってしまい
、コントロールシリンダにタンク圧が導かれ、容量制御
部材は補助シリンダによりポンプ容量を増大するように
作動し、サーボ弁はコントロールシリンダにポンプ容量
を減少させることを繰返し、原動機回転数が更に増大し
てもポンプに一定の液量しか吐出させ得ない結果となる
が、本発明のものでは流量調整用絞り弁を容量制御装置
に連結し、該装置がポンプ容量を少なく制御作動すると
きは該絞り弁の面積も小さく制御されるようにしたので
、原動機回転数が更に増大するとコントロールシリンダ
は更に少ないポンプ容量に制御して液量を減することが
出来る。即ち本発明のものでは容量制御装置がポンプ容
量を減少すべく作動し、これに伴い流量調整用絞り弁の
面積が狭められると、該絞り弁の前後にポンプ容量の減
少にも係わらずサーボ弁を作動させ続ける差圧が発生す
るのでポンプ容量を更に減少させることが出来る。原動
機回転数の増大が止まるとポンプ容量の減少で絞り弁の
前後の差圧が減少するのでサーボ弁は戻り、容量制御装
置のポンプ容量を減少させる作動が止まって、そのポン
プ容量が維持される。(Function) When the prime mover is driven and its rotational speed increases, the auxiliary cylinder of the volume control device causes the variable displacement pump, which has been waiting at maximum pump capacity, to gradually increase the amount of liquid as the rotational speed increases. It is discharged. The discharged pressure fluid is sent to the vehicle steering mechanism via a flow rate adjustment throttle valve in the pressure fluid circuit, but if the increase in fluid volume causes a pressure difference above and below a certain level across the throttle valve, the servo valve is activated. operates and guides the hydraulic pressure in the hydraulic circuit to the control cylinder of the displacement control device. The piston area of the control cylinder is larger than the piston area of the auxiliary cylinder, and the pistons of each cylinder are connected to each other via a movable control member such as a swash plate of the pump. is similar to the conventional one, and when hydraulic pressure is applied to the control cylinder, the displacement control member is tilted so that the pump displacement decreases against the force of the auxiliary cylinder. When the liquid port of the pressure liquid circuit decreases due to a decrease in pump capacity, the differential pressure across the throttle valve decreases, so in the conventional type, the servo valve returns to its original position, the tank pressure is guided to the control cylinder, and the capacity control member becomes auxiliary. The cylinder operates to increase the pump capacity, and the servo valve repeatedly causes the control cylinder to decrease the pump capacity, resulting in the pump only being able to discharge a constant amount of liquid even if the prime mover rotation speed further increases. However, in the present invention, the flow rate adjustment throttle valve is connected to a capacity control device, and when the device operates to reduce the pump capacity, the area of the throttle valve is also controlled to be small. If the amount increases further, the control cylinder can control the pump capacity to an even smaller amount to reduce the fluid volume. That is, in the present invention, when the capacity control device operates to reduce the pump capacity and the area of the flow rate adjustment throttle valve is accordingly narrowed, the servo valves are activated before and after the throttle valve despite the decrease in pump capacity. The pump capacity can be further reduced because a differential pressure is generated that keeps the pump operating. When the prime mover rotational speed stops increasing, the pump capacity decreases and the differential pressure across the throttle valve decreases, causing the servo valve to return, stopping the displacement control device's operation to reduce the pump capacity, and maintaining the pump capacity. .
具体的には原動機回転数の増大が止まってサーボ弁が戻
ると容量制御装置の補助シリンダはこれに作用する液圧
でポンプ容量及び絞り弁の面積を増大させようとするが
、該絞り弁の面積の増大の割合の方が流量の増大の割合
よりも小さくなるように該絞り弁の開度変化を設定して
おけば、絞り弁の前後に再びサーボ弁を閉じる差圧を発
生させ、ポンプ容量を減少させ得、原動機回転数が変わ
らぬ限り、微小に容量制御装置が増減作動を繰返してポ
ンプ容量をその回転数に適合した値に維持する。液量を
減少制御中に原動機回転数が減少すると絞り弁の前後の
差圧が小さくなるのでサーボ弁は移動し難くなり、補助
シリンダによるポンプ容量の増大を許容し、ポンプから
の液量が絞り弁の前後にサーボ弁を移動させる差圧を発
生させるようになるとコントロールシリンダに液圧が導
かれてポンプ容量の増大が止る。Specifically, when the prime mover rotational speed stops increasing and the servo valve returns, the auxiliary cylinder of the displacement control device tries to increase the pump capacity and the area of the throttle valve with the hydraulic pressure that acts on it. If the opening change of the throttle valve is set so that the rate of increase in area is smaller than the rate of increase in flow rate, a pressure difference is generated before and after the throttle valve that closes the servo valve again, and the pump As long as the displacement can be decreased and the prime mover rotational speed remains unchanged, the displacement control device repeats small increases and decreases to maintain the pump displacement at a value appropriate to the rotational speed. When the prime mover rotation speed decreases during liquid volume reduction control, the differential pressure across the throttle valve decreases, making it difficult for the servo valve to move, allowing the auxiliary cylinder to increase pump capacity, and reducing the volume of fluid from the pump. When a differential pressure is generated that moves the servo valve before and after the valve, hydraulic pressure is introduced to the control cylinder and the pump capacity stops increasing.
（実施例）
本発明の実施例を図面第３図につき説明すると、（１）
はハンドルにより操作される車両操向機構、（２）は車
両走行用原動機に連結した可変容量形ポンプ、（３）は
該ポンプ（２）から吐出される圧液を該車両操向機構（
１）に供給する圧液回路で、該機構（１）は該回路（３
）からり圧液の供給を受けて軽いハンドル操作力で作動
を行なえる。(Example) An example of the present invention will be explained with reference to FIG. 3. (1)
(2) is a variable displacement pump connected to the prime mover for driving the vehicle; (3) is a vehicle steering mechanism (2) that directs the pressurized fluid discharged from the pump (2) to the vehicle steering mechanism (2);
1), the mechanism (1) is a pressure fluid circuit that supplies the circuit (3).
) Receives a supply of pressure fluid and can be operated with light steering force.
（４）は該ポンプ（２）のポンプ容量を制御する容量制
御装置を示し、実施例のものでは該装置（４）を該圧液
回路（３）の圧液により作動されるコントロールシリン
ダ（５）とこれよりもピストンの受圧面が小さい補助シ
リンダ（６）とを設け、該コントロールシリンダ（５）
には圧液回路（３）に設けた流量調整用の可変の絞り弁
（７）の前後の圧力差により作動されるサーボ弁（８）
を介して該回路（３）の液圧又はタンク（９）のタンク
圧が作用するようにした。(4) indicates a capacity control device that controls the pump capacity of the pump (2), and in the embodiment, the device (4) is connected to a control cylinder (5) operated by the pressure fluid of the pressure fluid circuit (3). ) and an auxiliary cylinder (6) whose piston has a smaller pressure receiving surface than this, and the control cylinder (5)
There is a servo valve (8) operated by the pressure difference before and after the variable throttle valve (7) for adjusting the flow rate provided in the pressure fluid circuit (3).
The hydraulic pressure of the circuit (3) or the tank pressure of the tank (9) was made to act through the circuit.
ポンプ（１）の容量は例えば第５図示のように斜板００
を中心軸ａ３を中心として傾転させシリンダブロック（
ＩＤのピストンａつのストロークを変えることにより制
御されるが、該斜板（ＩＯの反対位置にコントロールシ
リンダ（５）と補助シリンダ（６）を連結することによ
り該コントロールシリンダ（５）にサーボ弁（８）を介
して圧液回路（３）の液圧が供給されると補助シリンダ
（６）に抗して斜板（ＩＯをその傾角が小さくなるよう
に押し、かくてポンプ容量が小さく制御されると共に、
サーボ弁（８）を介してタンク（９）の圧力がコントロ
ールシリンダ（５）に導かれるときは圧液回路（３）の
液圧が作用した補助シリンダ（６）の力により斜板（［
）はその傾角が大きくなるように押され、かくてポンプ
容量を大きく制御することが出来る。The capacity of the pump (1) is, for example, swash plate 00 as shown in Figure 5.
The cylinder block (
It is controlled by changing the stroke of the piston a of the ID, but by connecting the control cylinder (5) and the auxiliary cylinder (6) to the opposite position of the swash plate (IO), the servo valve (5) is connected to the control cylinder (5). When the hydraulic pressure of the hydraulic circuit (3) is supplied through the hydraulic circuit (3), the swash plate (IO) is pushed against the auxiliary cylinder (6) so that its inclination angle becomes small, and thus the pump displacement is controlled to be small. Along with
When the pressure of the tank (9) is guided to the control cylinder (5) via the servo valve (8), the force of the auxiliary cylinder (6) applied with the hydraulic pressure of the hydraulic circuit (3) causes the swash plate ([
) is pushed so that its inclination angle becomes large, thus allowing greater control of the pump displacement.
該容量制御装置（４）の補助シリンダ（６）のピストン
ロッド（６ａ）を絞り弁（７）のスプール（７ａ）と一
体とし該装置（４）がポンプ容量を減少させるように作
動するときは該絞り弁（７）の絞り面積（７ｂ）が減少
されるようにした。該容量制御装＠（４）の補助シリン
ダ（６）の作動によるポンプ容量の増減率を該絞り弁（
７）の絞り面積（７ｂ）の増減率よりも大きくなるよう
に設定することが好ましい。When the piston rod (6a) of the auxiliary cylinder (6) of the displacement control device (4) is integrated with the spool (7a) of the throttle valve (7), when the device (4) operates to reduce the pump displacement. The throttle area (7b) of the throttle valve (7) is reduced. The rate of increase/decrease in pump capacity due to the operation of the auxiliary cylinder (6) of the capacity control device @ (4) is controlled by the throttle valve (
It is preferable to set the rate of increase/decrease to be larger than the rate of increase/decrease of the aperture area (7b) in 7).
本発明の装置によれば原ｖＪ機の回転数が次第に増大し
てポンプ（２）から液圧回路（３）に吐出される液量が
増加しても該回路（３）の液量を第６図の曲線Ａで示す
ように成る回転数をピークとして次第に減少するように
制御することが出来、車両操向機構（１）に原動機回転
数の増大にも係わらず液量を無駄にすることなく自動的
に減少した液量を供給出来る。原動機回転数が増大した
車両の高速走行時に操向機構に少ない液量を供給すれば
、操向操作に要する力が増し、急ハンドルによる車両操
作ミスを少なく出来る。According to the device of the present invention, even if the rotational speed of the original VJ machine gradually increases and the amount of liquid discharged from the pump (2) to the hydraulic circuit (3) increases, the amount of liquid in the circuit (3) is It is possible to perform control such that the rotational speed peaks at the speed shown by curve A in Figure 6 and gradually decreases, thereby preventing the vehicle steering mechanism (1) from wasting fluid volume despite the increase in the prime mover rotational speed. It is possible to automatically supply a reduced amount of liquid without any problems. If a small amount of fluid is supplied to the steering mechanism when the vehicle is running at high speed with an increased rotational speed of the prime mover, the force required for steering operation will increase, and errors in vehicle operation due to sudden steering can be reduced.
原動機が駆動され、その回転数が次第に上昇すると、ポ
ンプ（２）から液圧回路（３）に吐出される液量も次第
に増える。液量の増大に伴い該回路（３）の絞り弁（７
）の前後に発生する差圧がサーボ弁（８）を移動させ、
コントロールシリンダ（５）に該回路（３）の上流の回
路（ＩＧの液圧を導くようになるとポンプ容量は該シリ
ンダ（５）により減少する。ポンプ容量の減少で該回路
（３）の液量が減少し、絞り（乃の前後の差圧が減少サ
ーボ弁（８）が戻るおそれがあるが、該絞り弁（７）は
容量制御装置（４）の補助シリンダ（６）と連動し、ポ
ンプ容量の減少と共に絞り弁（７＞の絞り面積が減少す
るのでサーボ弁（８）を移動位置に保持し、原動機の回
転数上昇に伴いポンプ容量を漸減させることが出来る。When the prime mover is driven and its rotational speed gradually increases, the amount of liquid discharged from the pump (2) to the hydraulic circuit (3) also gradually increases. As the liquid volume increases, the throttle valve (7) of the circuit (3)
) The differential pressure generated before and after moves the servo valve (8),
When the hydraulic pressure of the circuit (IG) upstream of the circuit (3) is introduced to the control cylinder (5), the pump capacity is reduced by the cylinder (5).As the pump capacity decreases, the liquid volume of the circuit (3) There is a risk that the servo valve (8) will return, but the throttle valve (7) is linked with the auxiliary cylinder (6) of the displacement control device (4), and the pressure difference across the throttle (no) decreases. Since the throttle area of the throttle valve (7>) decreases as the capacity decreases, the servo valve (8) can be held in the moving position and the pump capacity can be gradually decreased as the rotational speed of the prime mover increases.
原動機回転数の上昇が止まるとポンプ容量の減少で絞り
弁（７＞の前後の差圧が減少し、サーボ弁（８）はコン
トロールシリンダ（５）にタンク圧を作用させるように
戻り、容量制御装置（４）のポンプ容山減少作動は止ま
る。サーボ弁（８）が戻ると補助シリンダ（６）はポン
プ容量を増大させようと作動するが、ポンプ容量の増大
率よりも絞り面積の増大率が小さくなるように絞り弁（
７）を設定しておくことによりポンプ容量の増大の途中
でサーボ弁（８）を移動させる差圧を再び発生させ得、
容量制御装置（４）はポンプ容量の増減作動を微小に繰
返してポンプ容量を原動回転数に応じた容量に維持する
。またポンプ容量の減少制御中に原動機回転数が減少し
たときは、液量が減って絞り弁（７）前後の差圧が小さ
くなり、サーボ弁（８）はばねで復帰し、補助シリンダ
（６）に粛りポンプ容量が増大し、回路（３）の液量が
絞り弁（７）の前後にサーボ弁（８）を移動させるに足
りる差圧を発生するようになるとコントロールシリンダ
（５）に液圧が導かれてポンプ容量の増大が止まる。When the prime mover rotation speed stops increasing, the pump capacity decreases and the differential pressure across the throttle valve (7) decreases, and the servo valve (8) returns to applying tank pressure to the control cylinder (5), controlling the capacity. The pump capacity reduction operation of the device (4) stops.When the servo valve (8) returns, the auxiliary cylinder (6) operates to increase the pump capacity, but the rate of increase in the throttle area is higher than the rate of increase in pump capacity. Adjust the throttle valve (
By setting 7), the differential pressure that moves the servo valve (8) can be generated again during the increase in pump capacity.
The capacity control device (4) maintains the pump capacity at a capacity corresponding to the driving rotation speed by repeatedly increasing and decreasing the pump capacity. In addition, when the prime mover rotation speed decreases during pump capacity reduction control, the fluid volume decreases and the differential pressure across the throttle valve (7) becomes smaller, the servo valve (8) returns with a spring, and the auxiliary cylinder (6 ), the pump capacity increases, and the liquid level in the circuit (3) generates enough differential pressure to move the servo valve (8) before and after the throttle valve (7), the control cylinder (5) The hydraulic pressure is introduced and the pump capacity stops increasing.
（発明の効果）
このように本発明にるときは車両操向機構に圧液を供給
する可変量形ポンプの容量制御装置に該機構への圧液回
路に設けた可変絞り弁を連結し、ポンプの回転数の増加
に応じて該制御装置がポンプの傾角を減少させると共に
可変絞り弁の絞り面積を減少するようにしたので、ポン
プが吐出する液量に無駄を生じることなく操向機構へ送
る液量を原動機回転数の上昇と共に減じて供給すること
が出来、原動機動力の無駄を排除出来る効果がある。(Effects of the Invention) According to the present invention, a variable throttle valve provided in a pressure fluid circuit to the vehicle steering mechanism is connected to a capacity control device of a variable displacement pump that supplies pressure fluid to the vehicle steering mechanism, The control device reduces the inclination angle of the pump and the throttle area of the variable throttle valve in response to an increase in the rotational speed of the pump, so that the amount of liquid discharged by the pump is not wasted and can be adjusted to the steering mechanism. The amount of liquid to be sent can be reduced and supplied as the rotational speed of the prime mover increases, which has the effect of eliminating waste of prime mover power.
第１図は従来例の線図、第２図は第１図示のものの液量
制御線図、第３図は本発明の実施例の線図、第４図はそ
の具体例の截断側面図、第４図は本発明装置による液量
制御線図である。
（１）・・・車両操向機構
（→・・・可変容量形ポンプ
（３）・・・圧液回路
（４）・・・容量制御装置
（７）・・・流量調整用絞り弁
（８）・・・サーボ弁Fig. 1 is a diagram of the conventional example, Fig. 2 is a liquid flow control diagram of the one shown in Fig. 1, Fig. 3 is a diagram of the embodiment of the present invention, and Fig. 4 is a cutaway side view of the specific example. FIG. 4 is a liquid volume control diagram by the apparatus of the present invention. (1)... Vehicle steering mechanism (→... Variable displacement pump (3)... Pressure fluid circuit (4)... Capacity control device (7)... Throttle valve for flow rate adjustment (8 )...servo valve
Claims (1)
可変容量形ポンプから圧液を供給するようにしたものに
於いて、該ポンプのポンプ容量を変化させる容量制御装
置と該ポンプの液量調整用絞り弁とを、該原動機の回転
数が増大して該絞り弁を流れる液量が設定量まで増大す
ると該容量制御装置の作動により該絞り面積を減少すべ
く作動するように互に連結して成る液圧式操向装置。In a vehicle steering mechanism in which pressurized fluid is supplied from a variable displacement pump connected to a prime mover whose rotational speed is varied, a displacement control device for changing the pump displacement of the pump, and a hydraulic fluid of the pump are provided. and a throttle valve for adjusting the volume, so that when the rotational speed of the prime mover increases and the amount of liquid flowing through the throttle valve increases to a set amount, the volume control device operates to reduce the throttle area. A hydraulic steering device that is connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013497A JPS61175174A (en) | 1985-01-29 | 1985-01-29 | Hydraulic steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013497A JPS61175174A (en) | 1985-01-29 | 1985-01-29 | Hydraulic steering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61175174A true JPS61175174A (en) | 1986-08-06 |
Family
ID=11834750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60013497A Pending JPS61175174A (en) | 1985-01-29 | 1985-01-29 | Hydraulic steering device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61175174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006034665A1 (en) * | 2004-09-28 | 2006-04-06 | Ixetic Bad Homburg Gmbh | Steering boost system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53140604A (en) * | 1977-05-14 | 1978-12-07 | Jidosha Kiki Co Ltd | Variable capacity pump |
| JPS56146085A (en) * | 1980-04-14 | 1981-11-13 | Nissan Motor Co Ltd | Oil pressure device for automobile |
| JPS59118575A (en) * | 1982-12-25 | 1984-07-09 | Saitama Kiki Kk | Hydraulic device for power steering |
-
1985
- 1985-01-29 JP JP60013497A patent/JPS61175174A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53140604A (en) * | 1977-05-14 | 1978-12-07 | Jidosha Kiki Co Ltd | Variable capacity pump |
| JPS56146085A (en) * | 1980-04-14 | 1981-11-13 | Nissan Motor Co Ltd | Oil pressure device for automobile |
| JPS59118575A (en) * | 1982-12-25 | 1984-07-09 | Saitama Kiki Kk | Hydraulic device for power steering |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006034665A1 (en) * | 2004-09-28 | 2006-04-06 | Ixetic Bad Homburg Gmbh | Steering boost system |
| US8235163B2 (en) | 2004-09-28 | 2012-08-07 | Luk Fahrzeug-Hydraulik Gmbh & Co. Kg | Steering boost system |
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