DE4022099C1 - Adjustable hydraulic car shock absorber - uses atmos pressure as low one, and has seal between low pressure side and valve plug - Google Patents

Adjustable hydraulic car shock absorber - uses atmos pressure as low one, and has seal between low pressure side and valve plug

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Publication number
DE4022099C1
DE4022099C1 DE19904022099 DE4022099A DE4022099C1 DE 4022099 C1 DE4022099 C1 DE 4022099C1 DE 19904022099 DE19904022099 DE 19904022099 DE 4022099 A DE4022099 A DE 4022099A DE 4022099 C1 DE4022099 C1 DE 4022099C1
Authority
DE
Germany
Prior art keywords
pressure
valve body
control element
vibration damper
seal
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 - Lifetime
Application number
DE19904022099
Other languages
German (de)
Inventor
Hubert 5208 Eitorf De Beck
Walter 5227 Windeck De Engel
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
Boge GmbH
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 Boge GmbH filed Critical Boge GmbH
Priority to DE19904022099 priority Critical patent/DE4022099C1/en
Application granted granted Critical
Publication of DE4022099C1 publication Critical patent/DE4022099C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/062—Bi-tubular units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient 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
    • B60G17/06—Characteristics of dampers, e.g. mechanical dampers
    • B60G17/08—Characteristics of fluid dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/154—Fluid spring with an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/412—Pneumatic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/10—Damping action or damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/18—Control arrangements
    • F16F2230/183—Control arrangements fluid actuated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The hydraulic shock absorber piston divided the cylinder into two fluid chamber halves while an adjuster loads a piston-parallel bypass via an axial valve, actuated by a control element in a housing. It is loaded at one side by low pressure, and by a spring and control pressure on the opposite side. Atmos. pressure, entering via a free connection (15) serves as the low pressure. There is a seal (17) between the control element (9) side loaded by atmos. pressure and the valve (7). The latter connects hydraulically to the equalising space (11) between the seal and the valve side loaded by the bypass pressure. USE/ADVANTAGE - For cars, with hysteresis-free response even at slight control pressure variations.

Description

Die Erfindung bezieht sich auf einen hydraulischen, ver­ stellbaren Schwingungsdämpfer mit einem Ausgleichsraum, für Kraftfahrzeuge, mit einem an einer Kolbenstange be­ festigten Dämpfungskolben, der den Arbeitszylinder in zwei mit Dämpfungsflüssigkeit gefüllte Kammerhälften unterteilt, wobei eine Verstellvorrichtung einen parallel zum Dämpfungskolben angeordneten Bypaß über einen axial beweglichen Ventilkörper beaufschlagt, der Ventilkörper von einem in einem Steuerraum angeordneten Steuerelement beaufschlagt wird, und das Steuerelement auf einer Seite von einem niedrigen Druck und auf der entgegengesetzten Seite von einer Federkraft und einem Steuerdruck beaufschlagt wird.The invention relates to a hydraulic, ver adjustable vibration damper with a compensation space, for motor vehicles, with one on a piston rod strengthened damping piston, which the working cylinder in two halves of the chamber filled with damping fluid subdivided, an adjustment device one Bypass arranged parallel to the damping piston acts on an axially movable valve body which Valve body from one arranged in a control room Control is applied, and the control on one side of a low pressure and on the opposite side of a spring force and one Control pressure is applied.

Es sind bereits derartige Schwingungsdämpfer bekannt, bei denen eine Verstellvorrichtung (DE-OS 17 75 415) parallel zum Dämpfungskolben angeordnet ist und eine Anpassung der Dämpfungskraft möglich ist. Dabei ist das Steuerelement vom Druck eines eingeschlossenen Gasvolumens als niedrigem Druck beaufschlagt.Such vibration dampers are already known where an adjustment device (DE-OS 17 75 415) is arranged parallel to the damping piston and a Adjustment of the damping force is possible. It is Control from the pressure of an enclosed Gas volume applied as a low pressure.

Darüber hinaus sind Schwingungsdämpfer vorgeschlagen worden (DE-OS 35 03 152), bei denen die Dämpfungsventile des Dämpfungskolbens über eine druckabhängige Vor­ richtung mehr oder weniger vorgespannt werden können. Vibration dampers are also proposed been (DE-OS 35 03 152), in which the damping valves of the damping piston via a pressure-dependent pre direction can be biased more or less.  

Nachteilig ist, daß bei Fahrzeugen mit stark unter­ schiedlichen Beladungszuständen (LKW's, NKW's, Busse, etc.) konventionelle Schwingungsdämpfer meist nur eine ungenügende Fahrsicherheit bieten, insbesondere durch mangelnde Wankstabilität bei Kurvenfahrt und bei Voll­ last. Der Dämpfungsbedarf eines solchen Fahrzeuges steigt mit zunehmender Beladung, da sich die somit schwerer werdenden Massen zunehmend schwerer beruhigen lassen.The disadvantage is that in vehicles with strong below different loading conditions (trucks, commercial vehicles, buses, etc.) conventional vibration dampers usually only one offer inadequate driving safety, especially through lack of roll stability when cornering and at full load. The damping requirement of such a vehicle increases with increasing load, since the heavier masses increasingly difficult to calm down to let.

Es sollte ein hydraulischer, verstellbarer Zweirohr- Schwingungsdämpfer mit einer stufenlosen Dämpfungskraft­ regelung in Zug- und Druckstufe geschaffen werden, dessen Verstellvorrichtung pneumatisch oder hydropneu­ matisch ansteuerbar ist, wobei ein möglicht hysterese­ freies Ansprechverhalten bei geringsten Steuerdruck­ änderungen und ebenfalls ein möglichst hysteresefreies Ansprechverhalten des Ventilkörpers bei Dämpfungsdruck­ beaufschlagung erzielbar ist und der dabei einen großen Verstellbereich, insbesondere für NKW's, aufweist.A hydraulic, adjustable two-pipe Vibration damper with a continuous damping force rebound and compression stages are created, whose adjustment device is pneumatic or hydropneu can be controlled mathematically, with a possible hysteresis free response at the lowest control pressure changes and also as hysteresis-free as possible Response behavior of the valve body at damping pressure loading can be achieved and it is a big one Adjustment range, especially for commercial vehicles.

Die Lösung dieser Aufgabe ist mit den Merkmalen von Patentanspruch 1 gegeben.The solution to this problem is with the features of Claim 1 given.

In Ausgestaltung der Erfindung ist vorgesehen, daß das Steuerelement von einer elastischen Membran umgeben und somit axial beweglich gehalten ist.In an embodiment of the invention it is provided that Control surrounded by an elastic membrane and is thus kept axially movable.

Nach einer weiteren besonders günstigen Ausführungsform sind der Ventilkörper und das Steuerelement einteilig ausgebildet.According to a further particularly favorable embodiment the valve body and the control element are in one piece educated.

In Ausgestaltung der Erfindung verläuft die Strömungs­ verbindung zwischen den beiden Stirnseiten des Ventil­ körpers, oder die Strömungsverbindung ist im Bereich der Außenfläche des Ventilkörpers angeordnet. Vorteilhaft ist hierbei, daß der mit dem Dämpfungsdruck des Bypasses beaufschlagte Ventilkörper zur Reibungsminderung bzw. zum besseren Ansprechverhalten über das Führungsspiel mit Dämpfungsmittel beaufschlagt wird. Durch die zusätz­ liche Strömungsverbindung wird das Lecköl in den system­ druckbeaufschlagten Ausgleichsraum annähernd drucklos zurückgeführt. Der Dämpfungsdruck des Bypasses kann somit die zur Atmosphäre wirkende Dichtung nicht beauf­ schlagen, so daß mit einer geringen Reibung zu rechnen ist.In an embodiment of the invention, the flow runs connection between the two ends of the valve body, or the flow connection is in the range of Arranged outer surface of the valve body. Advantageous is that with the damping pressure of the bypass acted valve body to reduce friction or for better responsiveness via the leadership game damping agent is applied. By the additional  leakage oil in the system pressurized compensation chamber almost without pressure returned. The bypass damping pressure can thus do not apply the seal to the atmosphere beat so that there is little friction is.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt.Preferred embodiments of the invention are in the drawings shown schematically.

Fig. 1 zeigt einen Schwingungsdämpfer mit einer Ver­ stellvorrichtung im Schnitt, Fig. 1 shows a vibration damper with an adjusting device Ver in section,

Fig. 2 zeigt die Verstelleinrichtung in vergrößertem Maßstab, Fig. 2 shows the adjusting device in an enlarged scale,

Fig. 3 zeigt eine weitere Variante einer Verstell­ vorrichtung, Fig. 3 shows a further variant of an adjusting device,

Fig. 4 und 5 zeigen Ausführungsbeispiele mit einer ent­ sprechenden Verstelleinrichtung. FIGS. 4 and 5 show embodiments with a ent speaking adjusting device.

Der in Fig. 1 dargestellte hydrauliche, verstellbare Zweirohr-Schwingungsdämpfer besteht im wesentlichen aus dem Arbeitszylinder 4, der durch den an der Kolbenstange 2 angeordndeten Dämpfungskolben 3 in zwei Kammerhälften unterteilt wird. Der Arbeitszylinder 4 ist zunächst vom Bypaß 6 und vom Ausgleichsraum 11 umgeben. Durch die Rückschlagventile 18 im Dämpfungskolben 3 und im Boden des Schwingungsdämpfers 1 wird das Dämpfungsmittel im Bypaß sowohl in der Zug- als auch in der Druckstufe jeweils in einer Richtung gepumpt, so daß die Verstell­ vorrichtung 5 für die Dämpfungskrafteinstellung heran­ gezogen wird. Durch den Bypaß 6 erfolgt eine Beauf­ schlagung des Ventilkörpers 7, der bei entsprechendem Druck den Bypaß 6 öffnet und das Dämpfungsmittel ent­ weder in den Ausgleichsraum 11 oder über das Rückschlag­ ventil 18 in die untere Kammerhälfte des Arbeits­ zylinders 4 strömen läßt. Im Steuerraum 8 ist ein Steuerelement 9 über eine elastische Membran 10 axial verschiebbar aufgehängt, wobei im Steuerraum 8 ein Steuerdruck entsprechend der Luftfeder 13 zusammen mit der Feder 14 aufgebracht wird. Bei entsprechendem Druck im Steuerraum wird der Ventilkörper 7 den Bypaß 6 schließen, und die Dämpfungskraft im Schwingungsdämpfer 1 wird somit erhöht.The illustrated in Fig. 1 hydra uliche, adjustable two-tube shock absorber consists essentially of the working cylinder 4 is divided by the angeordndeten to the piston rod 2 damping piston 3 into two chamber halves. The working cylinder 4 is initially surrounded by the bypass 6 and the compensation chamber 11 . Through the check valves 18 in the damping piston 3 and in the bottom of the vibration damper 1 , the damping agent in the bypass is pumped in both directions in the train and in the compression stage, so that the adjusting device 5 is used for the damping force setting. Through the bypass 6 is a Beauf beat of the valve body 7 , which opens the bypass 6 at the appropriate pressure and the damping agent ent either in the compensation chamber 11 or via the check valve 18 in the lower chamber half of the working cylinder 4 can flow. In the control room 8 , a control element 9 is suspended axially displaceably via an elastic membrane 10 , a control pressure corresponding to the air spring 13 being applied together with the spring 14 in the control room 8 . With a corresponding pressure in the control chamber, the valve body 7 will close the bypass 6 , and the damping force in the vibration damper 1 will thus be increased.

In der Fig. 2 ist eine Verstelleinrichtung 5 in ver­ größertem Maßstab dargestellt, wobei der Ventilkörper 7 mit dem Steuerelement 9 einteilig ausgebildet ist. Der Bypaß 6 läßt das Dämpfungsmittel stirnseitig am Ventil­ körper 7 angreifen, während der Steuerdruck im Steuer­ raum 9 zusammen mit der Feder 14 einen entsprechenden Druck auf das Steuerelement 9 ausübt. Die axiale Beweg­ lichkeit des Ventilkörpers 7 ist über die elastische Membran 10 gewährleistet. Auf der dem Steuerraum 9 entgegengesetzten Seite der Membran ist eine Entlüftung 15 zur Atmosphäre hin vorgesehen. Der Steuerdruck im Steuerraum 9 versucht, den Ventilkörper 7 axial auszu­ lenken, so daß der Bypaß 6 verschlossen wird, während das Dämpfungsmittel im Bypaß 6 über die Stirnseite des Ventilkörpers 7 den Ventilkörper 7 in Offenstellung be­ wegt. Durch das Dämpfungsmittel im Bypaß 6 wird eine Druckschmierung des Führungsspaltes 16 vorgenommen, wobei dieses Schmiermittel anschließend über die Strömungsverbindung 12 annähernd drucklos in den Aus­ gleichsraum 11 gelangt, so daß die Dichtung 17 nicht be­ aufschlagt wird.In Fig. 2, an adjusting device 5 is shown on a larger scale, wherein the valve body 7 is formed in one piece with the control element 9 . The bypass 6 allows the damping means to attack the end face of the valve body 7 , while the control pressure in the control chamber 9 together with the spring 14 exerts a corresponding pressure on the control element 9 . The axial movability of the valve body 7 is ensured via the elastic membrane 10 . A vent 15 to the atmosphere is provided on the side of the membrane opposite the control chamber 9 . The control pressure in the control chamber 9 tries to axially steer the valve body 7 , so that the bypass 6 is closed, while the damping means in the bypass 6 on the end face of the valve body 7 moves the valve body 7 in the open position. Due to the damping means in the bypass 6 , pressure lubrication of the guide gap 16 is carried out, this lubricant then coming via the flow connection 12 almost without pressure into the equalization space 11 , so that the seal 17 is not opened.

In der Fig. 3 ist ein Ausführungsbeispiel gezeigt, bei dem der Ventilkörper 7 eine Strömungsverbindung 12 von der einen zur anderen Stirnseite aufweist, so daß das Dämpfungsmittel des Bypasses 6, welche zur Druck­ schmierung des Führungsspaltes 16 herangezogen wird, wiederum in den Ausgleichsraum 11 annähernd drucklos ge­ langen kann.In Fig. 3, an embodiment is shown in which the valve body 7 has a flow connection 12 from one end to the other, so that the damping means of the bypass 6 , which is used for pressure lubrication of the guide gap 16 , again in the compensation chamber 11 approximately can get depressurized.

In der Fig. 4 ist eine Verstellvorrichtung 5 am Mantel­ rohr des Ausgleichsraumes 11 angebracht, wobei der Ventilkörper 7 sowie das Steuerelement 9 im Prinzip dem in Fig. 3 dargestellten Beispiel entspricht. Der Steuerraum 8 wird über die Luftfeder 13 mit Steuerdruck beaufschlagt.In FIG. 4, an adjusting device 5 is on the jacket tube of the compensating chamber 11 is attached, wherein the valve body 7 and the control member 9 in principle to the example shown in Figure 3 corresponds to.. The control chamber 8 is acted upon by control pressure via the air spring 13 .

In der Fig. 5 ist eine Ausführung gezeigt, bei dem der Ventilkörper 7 in einer Bohrung axial beweglich aufge­ nommen ist, wobei die hintere Stirnfläche des Ventil­ körpers 7 eine Strömungsverbindung 12 aufweist, die das der Druckschmierung dienende Lecköl drucklos in den Aus­ gleichsraum 11 fördert. Ansonsten ist dieses Aus­ führungsbeispiel mit dem in Fig. 4 bereits darge­ stellten gleich.In Fig. 5 an embodiment is shown in which the valve body 7 is axially movable in a bore, the rear end face of the valve body 7 has a flow connection 12 which promotes the pressure lubrication leak oil without pressure into the equalization chamber 11 . Otherwise, this exemplary embodiment is the same as that shown in FIG. 4.

Claims (6)

1. Hydraulischer verstellbarer Schwingungsdämper mit einem Ausgleichsraum für Kraftfahrzeuge, mit einem an einer Kolbenstange befestigten Dämpfungskolben, der den Arbeitszylinder in zwei mit Dämpfungsflüssig­ keit gefüllte Kammerhälften unterteilt, wobei eine Verstellvorrichtung einen parallel zum Dämpfungs­ kolben angeordneten Bypaß über einen axial beweg­ lichen Ventilkörper beaufschlagt, der Ventilkörper von einem in einem Steuerraum angeordneten Steuer­ element beaufschlagt wird und das Steuerelement auf einer Seite von einem niedrigen Druck und auf der entgegengesetzten Seite von einer Federkraft und einem Steuerdruck beaufschlagt wird, dadurch gekennzeichnet, daß als niedriger Druck der über eine freie Ver­ bindung (15) zutretende Atmosphärendruck wirkt, daß eine Dichtung (17) zwischen der mit Atmosphärendruck beaufschlagten Seite des Steuerelementes (9) und dem Ventilkörper (7) angeordnet ist und daß der Ventil­ körper (7) zwischen der Dichtung (17) und seiner mit dem Druck des Bypasses (6) beaufschlagten Fläche eine in den Ausgleichsraum (11) verlaufende Strömungsver­ bindung (12) aufweist. 1.Hydraulically adjustable vibration damper with a compensation chamber for motor vehicles, with a damping piston fastened to a piston rod, which divides the working cylinder into two chamber halves filled with damping fluid, an adjusting device acting on a bypass arranged parallel to the damping piston via an axially movable valve body which Valve body is acted upon by a control element arranged in a control chamber and the control element is acted upon on one side by a low pressure and on the opposite side by a spring force and a control pressure, characterized in that the low pressure has a free connection ( 15 ) Occurring atmospheric pressure acts that a seal ( 17 ) between the atmospheric pressure side of the control element ( 9 ) and the valve body ( 7 ) is arranged and that the valve body ( 7 ) between the seal ( 17 ) un d of its surface acted upon by the pressure of the bypass ( 6 ) has a flow connection ( 12 ) running into the compensation space ( 11 ). 2. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Steuerelement (9) von einer elastischen Mem­ bran (10) umgeben und somit axial beweglich gehalten ist.2. Vibration damper according to claim 1, characterized in that the control element ( 9 ) surrounded by an elastic membrane ( 10 ) and is thus held axially movable. 3. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilkörper (7) und das Steuerelement (9) einteilig ausgebildet sind (Fig. 2).3. Vibration damper according to claim 1, characterized in that the valve body ( 7 ) and the control element ( 9 ) are integrally formed ( Fig. 2). 4. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die dem Steuerelement (9) entgegengesetzt ange­ ordnete Seite des Ventilkörpers (7) vom Druck des By­ passes beaufschlagt wird (Fig. 5).4. Vibration damper according to claim 1, characterized in that the control element ( 9 ) opposite side of the valve body ( 7 ) is acted upon by the pressure of the by pass ( Fig. 5). 5. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Strömungsverbindung (12) zwischen den beiden Stirnseiten des Ventilkörpers (7) verläuft (Fig. 1, 3, 4).5. Vibration damper according to claim 1, characterized in that the flow connection ( 12 ) between the two end faces of the valve body ( 7 ) extends ( Fig. 1, 3, 4). 6. Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Strömungsverbindung (12) im Bereich der Außenfläche des Ventilkörpers (7) angeordnet ist (Fig. 2).6. Vibration damper according to claim 1, characterized in that the flow connection ( 12 ) is arranged in the region of the outer surface of the valve body ( 7 ) ( Fig. 2).
DE19904022099 1990-07-11 1990-07-11 Adjustable hydraulic car shock absorber - uses atmos pressure as low one, and has seal between low pressure side and valve plug Expired - Lifetime DE4022099C1 (en)

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Cited By (35)

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Publication number Priority date Publication date Assignee Title
EP0621417A2 (en) * 1993-04-23 1994-10-26 Öhlins Racing Ab Arrangement in a shock absorber
DE4436441A1 (en) * 1993-10-15 1995-04-20 Fichtel & Sachs Ag Method for controlling the running gear of a motor vehicle
EP0740086A1 (en) * 1995-04-27 1996-10-30 Automobiles Peugeot Arrangement for damping by fluid lamination and motor vehicle suspension system equiped with such a damping arrangement
DE19925724C1 (en) * 1999-06-07 2000-10-19 Mannesmann Sachs Ag Adjustable vibration damper for vehicle air springs has a pneumatic switch circuit to act as a balance between linked air springs with an effective damping even on a control pressure failure
DE19961963A1 (en) * 1999-12-22 2001-07-19 Mannesmann Sachs Ag Damping force device with adjustable damping force
DE10014467C1 (en) * 2000-03-23 2001-10-31 Mannesmann Sachs Ag Spring strut has duct which has section formed by unrolling piston fitted in container, and pneumatically connects damping device of oscillation damper and spring space bounded by U-type bellows
DE10244484C1 (en) * 2002-09-24 2003-12-24 Zf Sachs Ag Self-pumping hydropneumatic shock absorber with internal level control
DE10236963B3 (en) * 2002-08-13 2004-06-03 Tuhh-Technologie-Gmbh Controllable piston valve or bottom valve for a vibration damper
EP1978276A1 (en) * 2007-04-05 2008-10-08 Peugeot Citroën Automobiles S.A. Hydraulic valve and hydraulic damper comprising such a valve and unit comprising two dampers connected together
FR2914726A1 (en) * 2007-04-05 2008-10-10 Peugeot Citroen Automobiles Sa HYDRAULIC VALVE AND ADAPTABLE COMPENSATION SHOCK ABSORBER EQUIPPED WITH SUCH A HYDRAULIC VALVE FORMING A COMPENSATION MODULE
CN1952429B (en) * 2005-10-17 2010-09-08 武汉理工大学 Method for adjusting hysteresis effect of full-scale magnetorheological fluid (MR) damper
DE102011002339A1 (en) * 2011-04-29 2012-10-31 Thomas Ripa Shock absorber leg for a bicycle
DE112004002412B4 (en) * 2003-12-17 2014-07-10 Tenneco Automotive Operating Company Inc. Air pressure proportional damper
US9156519B2 (en) 2011-04-29 2015-10-13 Thomas Ripa Damping strut for a bicycle
DE112005000343B4 (en) * 2004-02-10 2016-01-07 Tenneco Automotive Operating Company Inc. Air pressure proportional damper for shock absorbers
WO2017102569A1 (en) * 2015-12-15 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Single-tube oscillation damper with end position damping, suspension strut with a single-tube oscillation damper with end position damping, and vehicle with a single-tube oscillation damper with end position damping
US11118649B2 (en) 2019-07-01 2021-09-14 Tenneco Automotive Operating Company Inc. Damper with side collector and external control valves
US11143260B2 (en) * 2018-12-28 2021-10-12 Tenneco Automotive Operating Company Inc. Damper with single external control valve
US11156261B2 (en) 2018-12-28 2021-10-26 Tenneco Automotive Operating Company Inc. Damper with multiple external control valves
US11248677B2 (en) 2019-07-18 2022-02-15 Tenneco Automotive Operating Company Inc. Pre-assembled piston accumulator insert device
WO2022053352A1 (en) * 2020-09-14 2022-03-17 Thyssenkrupp Bilstein Gmbh Controllable vibration damper
US11279198B2 (en) 2009-10-13 2022-03-22 Fox Factory, Inc. Methods and apparatus for controlling a fluid damper
US11279199B2 (en) 2012-01-25 2022-03-22 Fox Factory, Inc. Suspension damper with by-pass valves
US11299233B2 (en) 2009-01-07 2022-04-12 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11306798B2 (en) 2008-05-09 2022-04-19 Fox Factory, Inc. Position sensitive suspension damping with an active valve
US11408482B2 (en) 2009-01-07 2022-08-09 Fox Factory, Inc. Bypass for a suspension damper
US11472252B2 (en) 2016-04-08 2022-10-18 Fox Factory, Inc. Electronic compression and rebound control
US11499601B2 (en) 2009-01-07 2022-11-15 Fox Factory, Inc. Remotely operated bypass for a suspension damper
US11549565B2 (en) 2009-01-07 2023-01-10 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11619278B2 (en) 2009-03-19 2023-04-04 Fox Factory, Inc. Methods and apparatus for suspension adjustment
US11629774B2 (en) 2012-05-10 2023-04-18 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11635122B2 (en) 2019-07-18 2023-04-25 Tenneco Automotive Operating Company Inc. Intake device for a damper having a side collector
US11660924B2 (en) 2009-01-07 2023-05-30 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11708878B2 (en) 2010-01-20 2023-07-25 Fox Factory, Inc. Remotely operated bypass for a suspension damper
US11958328B2 (en) 2011-09-12 2024-04-16 Fox Factory, Inc. Methods and apparatus for suspension set up

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DE1775415A1 (en) * 1968-08-08 1971-07-01 Fichtel & Sachs Ag Vibration damper, strut or hydropneumatic suspension with load-dependent vibration damping
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Cited By (49)

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EP0621417A3 (en) * 1993-04-23 1996-12-27 Oehlins Racing Ab Arrangement in a shock absorber.
EP0621417A2 (en) * 1993-04-23 1994-10-26 Öhlins Racing Ab Arrangement in a shock absorber
DE4436441A1 (en) * 1993-10-15 1995-04-20 Fichtel & Sachs Ag Method for controlling the running gear of a motor vehicle
EP0740086A1 (en) * 1995-04-27 1996-10-30 Automobiles Peugeot Arrangement for damping by fluid lamination and motor vehicle suspension system equiped with such a damping arrangement
FR2733564A1 (en) * 1995-04-27 1996-10-31 Peugeot DAMPING ARRANGEMENT BY ROLLING A FLUID AND A SUSPENSION SYSTEM, IN PARTICULAR A MOTOR VEHICLE, EQUIPPED WITH SUCH A DAMPING ARRANGEMENT
DE19925724C1 (en) * 1999-06-07 2000-10-19 Mannesmann Sachs Ag Adjustable vibration damper for vehicle air springs has a pneumatic switch circuit to act as a balance between linked air springs with an effective damping even on a control pressure failure
FR2794827A1 (en) * 1999-06-07 2000-12-15 Mannesmann Sachs Ag ADJUSTABLE OSCILLATION SHOCK ABSORBER
DE19961963B4 (en) * 1999-12-22 2005-02-17 Zf Sachs Ag Dämpfkrafteinrichtung with variable damping force
DE19961963A1 (en) * 1999-12-22 2001-07-19 Mannesmann Sachs Ag Damping force device with adjustable damping force
DE10014467C1 (en) * 2000-03-23 2001-10-31 Mannesmann Sachs Ag Spring strut has duct which has section formed by unrolling piston fitted in container, and pneumatically connects damping device of oscillation damper and spring space bounded by U-type bellows
DE10236963B3 (en) * 2002-08-13 2004-06-03 Tuhh-Technologie-Gmbh Controllable piston valve or bottom valve for a vibration damper
DE10244484C1 (en) * 2002-09-24 2003-12-24 Zf Sachs Ag Self-pumping hydropneumatic shock absorber with internal level control
DE112004002412B4 (en) * 2003-12-17 2014-07-10 Tenneco Automotive Operating Company Inc. Air pressure proportional damper
DE112005000343B4 (en) * 2004-02-10 2016-01-07 Tenneco Automotive Operating Company Inc. Air pressure proportional damper for shock absorbers
CN1952429B (en) * 2005-10-17 2010-09-08 武汉理工大学 Method for adjusting hysteresis effect of full-scale magnetorheological fluid (MR) damper
EP1978276A1 (en) * 2007-04-05 2008-10-08 Peugeot Citroën Automobiles S.A. Hydraulic valve and hydraulic damper comprising such a valve and unit comprising two dampers connected together
FR2914727A1 (en) * 2007-04-05 2008-10-10 Peugeot Citroen Automobiles Sa HYDRAULIC VALVE, HYDRAULIC DAMPER EQUIPPED WITH SUCH VALVE AND ASSEMBLY FORMED OF TWO SHOCK ABSORBERS COUPLES BETWEEN THEM
FR2914726A1 (en) * 2007-04-05 2008-10-10 Peugeot Citroen Automobiles Sa HYDRAULIC VALVE AND ADAPTABLE COMPENSATION SHOCK ABSORBER EQUIPPED WITH SUCH A HYDRAULIC VALVE FORMING A COMPENSATION MODULE
EP1992835A1 (en) * 2007-04-05 2008-11-19 Peugeot Citroën Automobiles S.A. Hydraulic valve and damper with adaptable compensation comprising such a valve forming compensation module
US11306798B2 (en) 2008-05-09 2022-04-19 Fox Factory, Inc. Position sensitive suspension damping with an active valve
US11549565B2 (en) 2009-01-07 2023-01-10 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11299233B2 (en) 2009-01-07 2022-04-12 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11976706B2 (en) 2009-01-07 2024-05-07 Fox Factory, Inc. Remotely operated bypass for a suspension damper
US11499601B2 (en) 2009-01-07 2022-11-15 Fox Factory, Inc. Remotely operated bypass for a suspension damper
US11408482B2 (en) 2009-01-07 2022-08-09 Fox Factory, Inc. Bypass for a suspension damper
US11660924B2 (en) 2009-01-07 2023-05-30 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11890908B2 (en) 2009-01-07 2024-02-06 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11866120B2 (en) 2009-01-07 2024-01-09 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11794543B2 (en) 2009-01-07 2023-10-24 Fox Factory, Inc. Method and apparatus for an adjustable damper
US11920655B2 (en) 2009-03-19 2024-03-05 Fox Factory, Inc. Methods and apparatus for suspension adjustment
US11619278B2 (en) 2009-03-19 2023-04-04 Fox Factory, Inc. Methods and apparatus for suspension adjustment
US11279198B2 (en) 2009-10-13 2022-03-22 Fox Factory, Inc. Methods and apparatus for controlling a fluid damper
US11708878B2 (en) 2010-01-20 2023-07-25 Fox Factory, Inc. Remotely operated bypass for a suspension damper
US9156519B2 (en) 2011-04-29 2015-10-13 Thomas Ripa Damping strut for a bicycle
DE102011002339B4 (en) * 2011-04-29 2013-01-24 Thomas Ripa Shock absorber leg for a bicycle
EP2518365A3 (en) * 2011-04-29 2017-12-27 Thomas Ripa Shock absorber strut for a bicycle
DE102011002339A1 (en) * 2011-04-29 2012-10-31 Thomas Ripa Shock absorber leg for a bicycle
US11958328B2 (en) 2011-09-12 2024-04-16 Fox Factory, Inc. Methods and apparatus for suspension set up
US11760150B2 (en) 2012-01-25 2023-09-19 Fox Factory, Inc. Suspension damper with by-pass valves
US11279199B2 (en) 2012-01-25 2022-03-22 Fox Factory, Inc. Suspension damper with by-pass valves
US11629774B2 (en) 2012-05-10 2023-04-18 Fox Factory, Inc. Method and apparatus for an adjustable damper
WO2017102569A1 (en) * 2015-12-15 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Single-tube oscillation damper with end position damping, suspension strut with a single-tube oscillation damper with end position damping, and vehicle with a single-tube oscillation damper with end position damping
US11472252B2 (en) 2016-04-08 2022-10-18 Fox Factory, Inc. Electronic compression and rebound control
US11156261B2 (en) 2018-12-28 2021-10-26 Tenneco Automotive Operating Company Inc. Damper with multiple external control valves
US11143260B2 (en) * 2018-12-28 2021-10-12 Tenneco Automotive Operating Company Inc. Damper with single external control valve
US11118649B2 (en) 2019-07-01 2021-09-14 Tenneco Automotive Operating Company Inc. Damper with side collector and external control valves
US11635122B2 (en) 2019-07-18 2023-04-25 Tenneco Automotive Operating Company Inc. Intake device for a damper having a side collector
US11248677B2 (en) 2019-07-18 2022-02-15 Tenneco Automotive Operating Company Inc. Pre-assembled piston accumulator insert device
WO2022053352A1 (en) * 2020-09-14 2022-03-17 Thyssenkrupp Bilstein Gmbh Controllable vibration damper

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