JPS646984B2 - - Google Patents

Info

Publication number
JPS646984B2
JPS646984B2 JP55135465A JP13546580A JPS646984B2 JP S646984 B2 JPS646984 B2 JP S646984B2 JP 55135465 A JP55135465 A JP 55135465A JP 13546580 A JP13546580 A JP 13546580A JP S646984 B2 JPS646984 B2 JP S646984B2
Authority
JP
Japan
Prior art keywords
hydraulic pump
control valve
steering
steering wheel
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.)
Expired
Application number
JP55135465A
Other languages
Japanese (ja)
Other versions
JPS5760972A (en
Inventor
Seiji Komamura
Masumi Hayashi
Hiroyuki Hashizume
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP55135465A priority Critical patent/JPS5760972A/en
Publication of JPS5760972A publication Critical patent/JPS5760972A/en
Publication of JPS646984B2 publication Critical patent/JPS646984B2/ja
Granted legal-status Critical Current

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  • Power Steering Mechanism (AREA)

Description

【発明の詳細な説明】 本発明は自動車などの動力舵取装置に関する。[Detailed description of the invention] The present invention relates to a power steering device for an automobile or the like.

自動車のハンドル操作力を軽減するために、油
圧を利用した動力舵取装置(パワーステアリン
グ)の採用が注目されている。
In order to reduce the steering force required for automobiles, the adoption of power steering devices that utilize hydraulic pressure is attracting attention.

この動力舵取装置では圧力源となる油圧ポンプ
を、エンジン出力の一部を用いて駆動しているの
が普通で、例えばクランクシヤフトの回転により
油圧ポンプを回転させている。
In this power steering system, a hydraulic pump serving as a pressure source is normally driven using part of the engine output, and for example, the hydraulic pump is rotated by rotation of a crankshaft.

ところで油圧ポンプは常時駆動されているた
め、ハンドル操作時以外には不要な吐出油はタン
ク側へとドレーンされている。
By the way, since the hydraulic pump is constantly driven, the discharged oil that is unnecessary except when the handle is operated is drained to the tank side.

油圧ポンプの駆動力に消費される分だけ、自動
車の燃費効率は低下するわけであるが、とくにハ
ンドル操作時以外は無駄にエネルギが費されてい
ることになる。
The fuel efficiency of the automobile decreases by the amount of driving force consumed by the hydraulic pump, but energy is wasted especially when not operating the steering wheel.

本発明はかかる問題に着目し、ハンドル操作時
にのみ油圧ポンプを駆動して操舵負荷に見合つた
必要量の圧油を供給するようにして、効率的に省
エネルギ化をはかつた動力舵取装置を提供するこ
とを目的とする。
The present invention focuses on this problem, and the present invention provides a power steering system that efficiently saves energy by driving a hydraulic pump only when the steering wheel is operated to supply the necessary amount of pressure oil commensurate with the steering load. The purpose is to provide

以下、本発明の実施例を図面にもとづいて説明
する。
Embodiments of the present invention will be described below based on the drawings.

ハンドル1には制御バルブ2が連動し、この制
御バルブ2の切換えにもとづいてパワーシリンダ
(アクチユエータ)3に選択的に供給される圧油
により、車輪(図示せず)を転向するステアリン
グギア4が駆動される。
A control valve 2 is interlocked with the handle 1, and based on the switching of the control valve 2, pressurized oil is selectively supplied to a power cylinder (actuator) 3, which causes a steering gear 4 to turn the wheels (not shown). Driven.

制御バルブ2はハンドル1の回転に応じて油圧
ポンプ5からの圧油を流量制御弁8を介してパワ
ーシリンダ3に送り込むとともに、その戻り油を
タンク6に導く。
The control valve 2 sends pressure oil from the hydraulic pump 5 to the power cylinder 3 via the flow control valve 8 in accordance with the rotation of the handle 1, and guides the return oil to the tank 6.

油圧ポンプ5は、電動モータ7により回転駆動
され、この駆動時にのみ圧油を吐出する。
The hydraulic pump 5 is rotationally driven by an electric motor 7, and discharges pressure oil only when driven.

電動モータ7はハンドル1が中立位置からいず
れかの方向に操作されたときのみ起動するよう
に、検出スイツチ9、制御回路10を介して作動
が制御される。
The operation of the electric motor 7 is controlled via a detection switch 9 and a control circuit 10 so that the electric motor 7 is activated only when the handle 1 is operated in either direction from the neutral position.

検出スイツチ9は例えばハンドル1の中立位置
に可動接点が設けられ、いずれかの方向にでも切
換わつたときにはそれを検知して制御回路10へ
入力する。
The detection switch 9 is provided with a movable contact at the neutral position of the handle 1, for example, and when the switch is switched in either direction, it is detected and input to the control circuit 10.

制御回路10は検出スイツチ9からの信号が入
力するハンドル操作時のみ、電動モータ7に駆動
電流を供給して回転させるが、同時に制御回路1
0へ車速信号などを入力しておき、この車速の低
下に応じて電動モータ7の回転速度またはトルク
を高めるように駆動電流(電圧)を増加し、操舵
抵抗の増大に対応して油圧ポンプ5の吐出(量
圧)を高めてもよい。
The control circuit 10 supplies a drive current to the electric motor 7 to rotate it only when the handle is operated when a signal from the detection switch 9 is input, but at the same time, the control circuit 1
0, the drive current (voltage) is increased to increase the rotational speed or torque of the electric motor 7 in response to the decrease in vehicle speed, and the hydraulic pump 5 is increased in response to the increase in steering resistance. The discharge (volume pressure) may be increased.

前記流量制御弁8は操舵抵抗に応じて発生する
油圧力を検知して流量を自動的にコントロールす
るもので、圧力の低いときは小流量を、圧力の高
いときは大流量を制御バルブ2を介してパワーシ
リンダ3に供給する。
The flow rate control valve 8 automatically controls the flow rate by detecting the hydraulic pressure generated in response to steering resistance, and controls the control valve 2 to control a small flow rate when the pressure is low, and a large flow rate when the pressure is high. It is supplied to the power cylinder 3 through the power cylinder 3.

具体的にはスプール11に取付けたバルブ12
の前圧P1と後圧P2との差圧と、スプール11を
バルブ開度増加方向に付勢するスプリング13と
のバランスに応じて、リターンポート14を開閉
することにより、上記のように流量をコントロー
ルするものである。
Specifically, the valve 12 attached to the spool 11
By opening and closing the return port 14 according to the balance between the differential pressure between the front pressure P 1 and the rear pressure P 2 and the spring 13 that biases the spool 11 in the direction of increasing the valve opening, the It controls the flow rate.

15は供給ポート、16は作動ポート、17は
前圧室、18は後圧室、19は圧力連通路であ
る。
15 is a supply port, 16 is an operation port, 17 is a front pressure chamber, 18 is a back pressure chamber, and 19 is a pressure communication path.

次に作用について説明する。 Next, the effect will be explained.

ハンドル1が中立位置にあるとき、すなわち自
動車が直進走行したり停車しているときは、電動
モータ7には駆動電流が供給されず、油圧ポンプ
5は回転しない。したがつて圧油の供給は行われ
ない。
When the steering wheel 1 is in the neutral position, that is, when the vehicle is traveling straight or stopped, no drive current is supplied to the electric motor 7 and the hydraulic pump 5 does not rotate. Therefore, no pressure oil is supplied.

ハンドル1をいずれかに切換えると、検出スイ
ツチ9を介して制御回路10から電動モータ7に
駆動電流が供給される。
When the handle 1 is switched to either position, a drive current is supplied from the control circuit 10 to the electric motor 7 via the detection switch 9.

このためモータ7が回転して油圧ポンプ5を駆
動する。油圧ポンプ5からの吐出油が流量制御弁
8を経て、制御バルブ2によりハンドル切換方向
に応じてパワーシリンダ3に送り込まれる。
Therefore, the motor 7 rotates and drives the hydraulic pump 5. Discharged oil from the hydraulic pump 5 passes through the flow rate control valve 8 and is sent to the power cylinder 3 by the control valve 2 according to the direction in which the handle is switched.

この油圧力の補助を受けて動力的に操舵が行わ
れ、ハンドル1の操作力が軽減されるわけであ
る。勿論、このときハンドルの回転方向と油圧力
の作用方向とが一致することは、公知のパワース
テアリングと同じである。
Steering is performed dynamically with the assistance of this hydraulic pressure, and the operating force of the steering wheel 1 is reduced. Of course, at this time, the direction of rotation of the steering wheel and the direction of application of hydraulic pressure are the same as in known power steering.

このようにして、ハンドル操作時のみ油圧ポン
プ5を駆動して必要な圧油を送り込むので、非操
作時には無駄に油圧ポンプ5を駆動しないです
み、エネルギロスを防げる。
In this way, the hydraulic pump 5 is driven to feed the necessary pressure oil only when the handle is operated, so there is no need to drive the hydraulic pump 5 needlessly when the handle is not operated, and energy loss can be prevented.

この場合、油圧ポンプ5とパワーシリンダ3と
の間に流量制御弁8を介装して、圧力の低いとき
は小流量を、高いときは大流量を供給するように
してあるので、ハンドル操作時のみ油圧ポンプ5
を駆動しても、応答よく操舵負荷に応じた操作動
力が得られる。
In this case, a flow control valve 8 is interposed between the hydraulic pump 5 and the power cylinder 3 to supply a small flow rate when the pressure is low and a large flow rate when the pressure is high. only hydraulic pump 5
Even if the steering wheel is driven, the operating power corresponding to the steering load can be obtained with good response.

以上のように本発明によれば、操舵に必要なと
きのみ圧油を送るようにしたので、常時油圧ポン
プを駆動することにより生じる損失を低減して、
効率的に省エネルギ化がはかれる。
As described above, according to the present invention, pressure oil is sent only when necessary for steering, thereby reducing the loss caused by constantly driving the hydraulic pump.
Energy saving can be achieved efficiently.

【図面の簡単な説明】[Brief explanation of drawings]

図は本発明の実施例を示す概略構成図である。 1……ハンドル、2……制御バルブ、3……パ
ワーシリンダ、5……油圧ポンプ、7……電動モ
ータ、8……流量制御弁、9……検出スイツチ、
10……制御回路。
The figure is a schematic configuration diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Handle, 2... Control valve, 3... Power cylinder, 5... Hydraulic pump, 7... Electric motor, 8... Flow rate control valve, 9... Detection switch,
10...Control circuit.

Claims (1)

【特許請求の範囲】[Claims] 1 ハンドル操作方向に応じて切換動作する制御
バルブと、この制御バルブを介して油圧ポンプか
ら選択的に供給される圧油により駆動される操舵
用のアクチユエータとを備えた動力舵取装置にお
いて、ハンドルが中立位置から操作されたことを
検出する手段と、この検出信号にもとづいてハン
ドル操作時のみ油圧ポンプを駆動する電動モータ
とを備え、かつ前記油圧ポンプの吐出油が、操舵
負荷圧力の上昇に応じて流量を増大させる流量制
御弁を介してアクチユエータに送り込まれるよう
に構成したことを特徴とする動力舵取装置。
1. In a power steering device that includes a control valve that switches according to the direction in which the steering wheel is operated, and a steering actuator that is driven by pressure oil that is selectively supplied from a hydraulic pump via the control valve, the steering wheel means for detecting that the steering wheel is operated from a neutral position, and an electric motor that drives a hydraulic pump only when the steering wheel is operated based on this detection signal, and the oil discharged from the hydraulic pump A power steering device characterized in that the power is sent to an actuator via a flow rate control valve that increases the flow rate accordingly.
JP55135465A 1980-09-29 1980-09-29 Power steering device Granted JPS5760972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135465A JPS5760972A (en) 1980-09-29 1980-09-29 Power steering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135465A JPS5760972A (en) 1980-09-29 1980-09-29 Power steering device

Publications (2)

Publication Number Publication Date
JPS5760972A JPS5760972A (en) 1982-04-13
JPS646984B2 true JPS646984B2 (en) 1989-02-07

Family

ID=15152342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135465A Granted JPS5760972A (en) 1980-09-29 1980-09-29 Power steering device

Country Status (1)

Country Link
JP (1) JPS5760972A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918066A (en) * 1982-06-25 1984-01-30 Jidosha Kiki Co Ltd Power steering unit
JPS59124771U (en) * 1983-02-09 1984-08-22 ティー・シー・エム株式会社 Cargo handling vehicle diversion device
JPS59149870A (en) * 1983-02-14 1984-08-27 Jidosha Kiki Co Ltd Power steering gear
JPH0647385B2 (en) * 1985-04-22 1994-06-22 日本電装株式会社 Vehicle power steering device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622167U (en) * 1979-07-28 1981-02-27

Also Published As

Publication number Publication date
JPS5760972A (en) 1982-04-13

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