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JPH07259910A - Self-suction-and-discharge type fluid pneumatic type macpherson strut with internal level controller - Google Patents

Self-suction-and-discharge type fluid pneumatic type macpherson strut with internal level controller

Info

Publication number
JPH07259910A
JPH07259910A JP6008495A JP6008495A JPH07259910A JP H07259910 A JPH07259910 A JP H07259910A JP 6008495 A JP6008495 A JP 6008495A JP 6008495 A JP6008495 A JP 6008495A JP H07259910 A JPH07259910 A JP H07259910A
Authority
JP
Japan
Prior art keywords
working
cylinder
piston
high pressure
valve
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
Application number
JP6008495A
Other languages
Japanese (ja)
Inventor
Werner Kuchheuser
ヴェルナー・クッフホイザー
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.)
ZF Friedrichshafen AG
Original Assignee
Fichtel and Sachs AG
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 Fichtel and Sachs AG filed Critical Fichtel and Sachs AG
Publication of JPH07259910A publication Critical patent/JPH07259910A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/044Self-pumping fluid springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

PURPOSE: To manufacture simply and at low cost using a small number of members without lowering performance by controlling fluid connection between a low pressure chamber and a pump cylinder by an inlet valve, and controlling fluid connection between the pump cylinder and a high pressure side working space by a pressure valve. CONSTITUTION: An actuating cylinder 11 has one or a plurality of starting holes 12. When an actuating piston 7 moves outward through the starting hole 12, pressure compensation occurs between a high pressure space 3 and a low pressure space 4, that is, during each stroke of the actuating piston 7 in the actuating cylinder 11, a buffer is fed into the high pressure side working space 3 from a pump cylinder 1 through a pressure valve 6. The approropriate buffer flows into the pump cylinder 1 from the low pressure space 4 through an inlet valve 2, and the actuating piston 7 constantly moves toward the piston rod outlet side until the starting hole 12 communicates with the high pressure side working space 3. The actuating piston 7 proceeds again to a specified level in the actuating cylinder 11 by successive pressure decrease.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、内部レベル制御装置を
備えた特に自動車のための自己吸排式流体空気圧式マク
ファーソンストラットであって、油充填作動シリンダを
備えており、該シリンダが、高圧室内に配置されてばね
として働く少なくとも1つのガスパッドの圧力を受けて
おり、且つピストンロッドによって担持された作動ピス
トンによって2つの作動空間に仕切られ、更に、ばね運
動によって駆動され且つ油を低圧室から、高圧室と接続
された作動空間内に送るピストンポンプと、作動シリン
ダ内での作動ピストンの位置に依存して閉鎖可能な始動
孔とを備えており、該始動孔が、高圧室と接続された作
動空間を低圧室と接続するようになったものに関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a self-priming fluid-pneumatic MacPherson strut, especially for motor vehicles, with an internal level control device, which comprises an oil-filled actuating cylinder, which cylinder comprises a high-pressure chamber. Located under the pressure of at least one gas pad acting as a spring and partitioned into two working spaces by a working piston carried by a piston rod, further driven by spring movement and moving oil from the low pressure chamber A piston pump for feeding into the working space connected to the high pressure chamber, and a starting hole that can be closed depending on the position of the working piston in the working cylinder, the starting hole being connected to the high pressure chamber. The working space is connected to the low pressure chamber.

【0002】[0002]

【従来の技術】作動シリンダが高圧空間と低圧空間とに
よって取り囲まれ、減衰ピストンが作動シリンダを2つ
の個別作動空間に仕切るようになったマクファーソンス
トラットは、既に知られている(例えば、ドイツ特許公
報第 36 30 757号)。作動シリンダの底にポンプロッド
が固着されており、該ロッドは、ピストンロッドの空洞
内にあってポンプシリンダとして働く制御スリーブと一
緒に、油ポンプを形成する。車軸とそれに固着されたピ
ストンロッドが路面の凸凹に起因して運動すると、この
油ポンプが作動して、該ポンプは、吸入弁によって制御
されて、低圧室から圧力弁と通路とを介して作動シリン
ダ内に絶えず油を送る。これにより、ピストンとピスト
ンロッドは、高圧を負荷された作動シリンダと低圧空間
との間の連絡をポンプロッドの始動孔が開放するまでの
間、制御スリーブでもって押し下げられ、これにより、
引き続き始動機能が始まる。
2. Description of the Prior Art MacPherson struts in which a working cylinder is surrounded by a high-pressure space and a low-pressure space and a damping piston divides the working cylinder into two separate working spaces are already known (for example, German Patent Publication). No. 36 30 757). Attached to the bottom of the working cylinder is a pump rod, which together with the control sleeve in the cavity of the piston rod acts as a pump cylinder, forms an oil pump. When the axle and the piston rod fixed to it move due to the unevenness of the road surface, this oil pump operates, and the pump is controlled by the suction valve to operate from the low pressure chamber through the pressure valve and the passage. Continuously feed oil into the cylinder. This causes the piston and the piston rod to be pushed down by the control sleeve until the opening between the starting hole of the pump rod opens the connection between the working cylinder under high pressure and the low pressure space.
The starting function continues.

【0003】この場合、欠点として、ポンプは費用をか
けて製造される複数の部材からなり、中空のピストンロ
ッドとポンプロッドも、又中空ピストンロッド内に配置
される制御スリーブも不可欠である。
In this case, the disadvantage is that the pump consists of several components that are expensive to manufacture and that a hollow piston rod and pump rod as well as a control sleeve arranged inside the hollow piston rod are essential.

【0004】[0004]

【発明が解決しようとする課題】本発明の課題は、所要
の機能を維持して、少ない数の部材を使用して安価で簡
単な製造を可能とする単純で確実に機能するレベル制御
装置を備えた自己吸排式流体空気圧式マクファーソンス
トラットを提供することである。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple and reliable functioning level control device which maintains the required function and allows a cheap and simple manufacture using a small number of components. A self-priming fluid-pneumatic MacPherson strut is provided.

【0005】[0005]

【課題を解決するための手段】この課題を解決するため
に、本発明によれば、ピストンロッド出口側の作動空間
がポンプシリンダとして構成されており、低圧室とポン
プシリンダとの間の流体接続を吸入弁が制御し、ポンプ
シリンダと高圧側作動空間との間の流体接続を圧力弁が
制御するようになっている。
To solve this problem, according to the present invention, the working space on the piston rod outlet side is configured as a pump cylinder, and a fluid connection between the low pressure chamber and the pump cylinder is provided. Is controlled by the suction valve, and the pressure valve controls the fluid connection between the pump cylinder and the working space on the high pressure side.

【0006】この場合、利点として、マクファーソンス
トラットをレベル制御するための本来のポンプは単にピ
ストンロッドと作動シリンダとからなり、ポンプシリン
ダはピストンロッド出口側作動空間内に直接形成され
る。適宜な吸入弁の配置によって、油は、ピストンロッ
ドの押入運動のとき、その都度、低圧室から吸排空間内
に送られ、ピストンロッドの引出運動のときには、作動
ピストン内に取付けられた圧力弁を通して高圧側作動空
間内に送られる。
In this case, as an advantage, the actual pump for level-controlling the MacPherson strut simply consists of the piston rod and the working cylinder, the pump cylinder being formed directly in the working space on the piston rod outlet side. By means of a suitable intake valve arrangement, oil is sent from the low-pressure chamber into the suction / exhaust space during each push-in movement of the piston rod, and through the pressure valve mounted in the working piston during the pull-out movement of the piston rod. It is sent to the working space on the high pressure side.

【0007】別の実施態様では、圧力弁は、作動ピスト
ンの範囲において、一方の運動方向のための減衰弁とし
て構成されている。その際、有利には、減衰弁が引張段
減衰弁として構成されている。高圧側に対向した作動空
間に付属して減衰弁が設けられることによって、別の特
徴が設けられている。この場合、有利には、減衰弁は作
動シリンダ内に底弁として配置することができ、こうし
て、緩衝剤は高圧側作動空間から底弁を介して高圧室内
に達する。
In another embodiment, the pressure valve is designed as a damping valve for one direction of movement in the region of the working piston. The damping valve is then preferably designed as a tension stage damping valve. Another feature is provided by the provision of a damping valve associated with the working space opposite the high pressure side. In this case, the damping valve can advantageously be arranged in the actuating cylinder as a bottom valve, so that the damping agent reaches the high-pressure chamber via the bottom valve from the high-pressure working space.

【0008】別の減衰力特性曲線を達成するために、作
動ピストンは少なくとも1つの運動方向のために減衰弁
を備えている。この場合、有利には、減衰弁が引張段減
衰弁として構成されている。作動空間に対する作動ピス
トンの位置に依存してポンプ効率を制御することは、作
動シリンダが作動ピストンの運動範囲内に少なくとも1
つのバイパスを備えていることによって可能となる。有
利には、作動シリンダの内面に少なくとも1つの溝がバ
イパスとして設けられている。別の実施態様では、高圧
側ガスパッドを分離するために隔膜又は環状分離ピスト
ンが設けられている。
In order to achieve another damping force characteristic curve, the working piston is equipped with a damping valve for at least one direction of movement. In this case, the damping valve is preferably designed as a tension stage damping valve. Controlling pump efficiency depending on the position of the working piston with respect to the working space ensures that the working cylinder is at least within the range of motion of the working piston.
This is possible by having two bypasses. Advantageously, the inner surface of the working cylinder is provided with at least one groove as a bypass. In another embodiment, a diaphragm or annular separating piston is provided to separate the high pressure side gas pad.

【0009】[0009]

【実施例】本発明の好ましい実施例が図面に略示されて
いる。図1に示された内部レベル制御装置を備えた自己
吸排式流体空気圧式マクファーソンストラットは実質的
に作動空間3からなり、該空間は作動ピストン7によっ
て2つの部分空間に仕切られる。作動ピストン7は、ピ
ストンロッド5に固着されており、且つ作動シリンダ11
を高圧側作動空間3とポンプシリンダ1とに仕切る。高
圧側作動空間3は、部分的にガスが、又部分的に緩衝剤
が充填された高圧空間と接続されている。ガスと緩衝剤
との分離は分離ピストン14又は弾性仕切壁13を介して行
われる。
The preferred embodiment of the invention is schematically illustrated in the drawings. The self-priming fluid-pneumatic MacPherson strut with internal level control shown in FIG. 1 essentially consists of a working space 3, which is divided into two sub-spaces by a working piston 7. The working piston 7 is fixed to the piston rod 5, and the working cylinder 11
Is partitioned into a high pressure side working space 3 and a pump cylinder 1. The high-pressure side working space 3 is connected to a high-pressure space which is partially filled with gas and partially filled with a buffer. Separation of the gas and the buffer is performed via the separation piston 14 or the elastic partition wall 13.

【0010】作動シリンダ11は、1個又は複数個の始動
孔12を有する。作動ピストン7が始動孔12を介して外方
に移動すると、高圧空間又は高圧側作動空間3と低圧空
間との間で圧力補償が起きる。つまり、作動シリンダ11
内での作動ピストンの各行程のとき、緩衝剤はポンプシ
リンダ1から圧力弁6を介して高圧側作動空間3内に送
られる。適宜な緩衝剤が、低圧空間4から、それぞれ吸
入弁2を介してポンプシリンダ1内に伴流し、作動ピス
トンは絶えずピストンロッド出口側の方向に、それもし
かも始動孔12と高圧側作動空間3とが連通するまで移動
する。引き続く圧力減成によって、作動ピストンは作動
シリンダ11内で再び所定のレベルに進行する。始動孔12
は、作動シリンダ11内の適宜な所定位置にあり、この位
置において自動車の車体は適宜な所定レベルを占める。
The working cylinder 11 has one or a plurality of starting holes 12. When the working piston 7 moves outward through the starting hole 12, pressure compensation occurs between the high pressure space or the high pressure side working space 3 and the low pressure space. That is, the working cylinder 11
At each stroke of the working piston therein, the buffer is sent from the pump cylinder 1 via the pressure valve 6 into the working space 3 on the high pressure side. A suitable buffering agent wakes up from the low-pressure space 4 into the pump cylinder 1 via the suction valve 2, respectively, and the working piston constantly moves in the direction of the piston rod outlet side, and also the starting hole 12 and the high-pressure side working space 3 Move until and are in communication. Subsequent pressure reduction causes the working piston to advance again to a predetermined level in the working cylinder 11. Starting hole 12
Is at an appropriate predetermined position in the working cylinder 11, and the vehicle body occupies an appropriate predetermined level at this position.

【0011】図2から、好適な細部を読み取ることがで
き、このようなものとして実質的には、作動シリンダ11
の底に設けられた減衰弁8があり、該弁は特定の減衰力
特性曲線を生成するために高圧側作動空間3と高圧空間
との間に取付けられている。更に、作動ピストン7内に
弁9が配置されており、該弁は、この実施状態では吸排
圧力弁として、そして引張段においては減衰弁として働
く。作動ピストン7内のこの減衰弁によって、適宜な減
衰力特性曲線をやはり達成することができ、減衰弁の特
定開口圧力以降、吸排機能が調節される。
The preferred details can be read from FIG. 2, and as such, in effect, the working cylinder 11
There is a damping valve 8 provided at the bottom of the valve, which is mounted between the high-pressure side working space 3 and the high-pressure space in order to generate a specific damping force characteristic curve. Furthermore, a valve 9 is arranged in the actuating piston 7, which acts as an intake and exhaust pressure valve in this embodiment and as a damping valve in the tension stage. With this damping valve in the actuating piston 7, a suitable damping force characteristic curve can still be achieved and after a certain opening pressure of the damping valve the suction and discharge function is adjusted.

【0012】ポンプ効率は、例えば、各行程において作
動ピストン7が歩む特定の軸方向進路にわたって、適宜
な溝が作動シリンダ11の内壁に設けられることによっ
て、作動シリンダ11内の適宜なバイパス10によって制御
することができる。これにより、所定のレベルにおいて
吸排機能を無効とすることが達成される。
The pump efficiency is controlled by a suitable bypass 10 in the working cylinder 11, for example by providing a suitable groove in the inner wall of the working cylinder 11 over a specific axial path taken by the working piston 7 in each stroke. can do. This achieves deactivating the intake and exhaust function at a given level.

【0013】[0013]

【発明の効果】以上のごとく、所要の機能を維持しつ
つ、少ない数の部材を使用して安価で簡単な製造を可能
とする自己吸排式流体空気圧式マクファーソンストラッ
トを提供することができる。
As described above, it is possible to provide a self-priming fluid-pneumatic MacPherson strut that can be manufactured inexpensively and easily by using a small number of members while maintaining the required functions.

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

【図1】自己吸排式流体空気圧式マクファーソンストラ
ットの断面図である。
FIG. 1 is a cross-sectional view of a self-priming fluid-pneumatic MacPherson strut.

【図2】減衰ピストン、底又は圧力空間の範囲における
マクファーソンストラットの別の細部を示す。
FIG. 2 shows another detail of a MacPherson strut in the area of the damping piston, bottom or pressure space.

【符号の説明】[Explanation of symbols]

1 ポンプシリンダ 2 吸入弁 3 高圧側作動空間 4 低圧空間 5 ピストンロッド 6 圧力弁 7 作動ピストン 8 減衰弁(底) 9 減衰弁(ピストン) 10 バイパス 11 作動シリンダ 12 始動孔 13 隔膜 14 環状分離ピストン 1 Pump Cylinder 2 Suction Valve 3 High Pressure Side Working Space 4 Low Pressure Space 5 Piston Rod 6 Pressure Valve 7 Working Piston 8 Damping Valve (Bottom) 9 Damping Valve (Piston) 10 Bypass 11 Working Cylinder 12 Starting Hole 13 Diaphragm 14 Annular Separating Piston

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 内部レベル制御装置を備えた特に自動車
のための自己吸排式流体空気圧式マクファーソンストラ
ットであって、油充填作動シリンダを備えており、該シ
リンダが、高圧室内に配置されてばねとして働く少なく
とも1つのガスパッドの圧力を受けており、且つピスト
ンロッドによって担持された作動ピストンによって2つ
の作動空間に仕切られ、更に、ばね運動によって駆動さ
れ且つ油を低圧室から、高圧室と接続された作動空間内
に送るピストンポンプと、作動シリンダ内での作動ピス
トンの位置に依存して閉鎖可能な始動孔とを備えてお
り、該始動孔が、高圧室と接続された作動空間を低圧室
と接続するようになったものにおいて、ピストンロッド
出口側の作動空間(1) がポンプシリンダとして構成され
ており、低圧室(4) とポンプシリンダ(1) との間の流体
接続を吸入弁(2) が制御し、ポンプシリンダと高圧側作
動空間(3) との間の流体接続を圧力弁が制御することを
特徴とするマクファーソンストラット。
1. A self-priming fluid-pneumatic MacPherson strut with an internal level control, especially for motor vehicles, comprising an oil-filled actuating cylinder, which cylinder is arranged as a spring in a high-pressure chamber. It is under pressure of at least one working gas pad and is divided into two working spaces by a working piston carried by a piston rod, further driven by a spring movement and connecting oil from a low pressure chamber to a high pressure chamber. And a starting hole that can be closed depending on the position of the working piston in the working cylinder, and the starting hole allows the working space connected with the high pressure chamber to be in the low pressure chamber. The working space (1) on the piston rod outlet side is configured as a pump cylinder, and the low pressure chamber (4) Suction valve a fluid connection between the Pushirinda (1) (2) is controlled, MacPherson struts, characterized in that the control pressure valve a fluid connection between the pump cylinder and the high pressure side working space (3).
【請求項2】 高圧側に対向した作動空間(3) に付属し
て減衰弁(8) が設けられていることを特徴とする、請求
項1に記載のマクファーソンストラット。
2. The MacPherson strut according to claim 1, wherein a damping valve (8) is attached to the working space (3) facing the high pressure side.
【請求項3】 作動ピストン(7) が、少なくとも一方の
運動方向のために、減衰弁(9) を備えていることを特徴
とする、請求項1に記載のマクファーソンストラット。
3. MacPherson strut according to claim 1, characterized in that the working piston (7) is provided with a damping valve (9) for at least one direction of movement.
【請求項4】 作動シリンダ(11)が、作動ピストン(7)
の運動範囲内に、少なくとも1つのバイパス(10)を備え
ていることを特徴とする、請求項1に記載のマクファー
ソンストラット。
4. The working cylinder (11) comprises a working piston (7).
MacPherson strut according to claim 1, characterized in that it comprises at least one bypass (10) in its range of motion.
【請求項5】 バイパスとして少なくとも1つの溝(10)
が作動シリンダの内面に設けられていることを特徴とす
る、請求項4に記載のマクファーソンストラット。
5. At least one groove (10) as a bypass
5. The MacPherson strut according to claim 4, wherein is provided on the inner surface of the working cylinder.
【請求項6】 高圧側ガスパッドを分離するために隔膜
(13)又は環状分離ピストン(14)が設けられることを特徴
とする、請求項1に記載のマクファーソンストラット。
6. A diaphragm for separating the high pressure side gas pad.
MacPherson strut according to claim 1, characterized in that it is provided with (13) or an annular separating piston (14).
JP6008495A 1994-02-26 1995-02-24 Self-suction-and-discharge type fluid pneumatic type macpherson strut with internal level controller Pending JPH07259910A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE44-06-348-2 1994-02-26
DE19944406348 DE4406348C1 (en) 1994-02-26 1994-02-26 Self-pumping hydropneumatic vehicle shock absorber with level control

Publications (1)

Publication Number Publication Date
JPH07259910A true JPH07259910A (en) 1995-10-13

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Application Number Title Priority Date Filing Date
JP6008495A Pending JPH07259910A (en) 1994-02-26 1995-02-24 Self-suction-and-discharge type fluid pneumatic type macpherson strut with internal level controller

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DE (1) DE4406348C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545661C1 (en) * 1995-12-07 1997-02-13 Fichtel & Sachs Ag Self-pumping hydropneumatic shock absorber with internal level control
DE112011103247T5 (en) * 2010-09-28 2013-08-14 Norgren Gmbh damping cylinder
DE102011079787A1 (en) * 2011-07-26 2013-01-31 Zf Friedrichshafen Ag Self-pumping hydro-pneumatic spring strut for controlling damping and compensation level of motor vehicle, has mechanical damper arranged in step-shaped groove formed in wall of working cylinder, to provide two different damping levels

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630757A1 (en) * 1986-09-10 1988-03-24 Boge Ag Self-priming hydropneumatic spring strut with internal level control

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