WO2011120119A1 - Válvula de controle de tração para amortecedor hidráulico - Google Patents
Válvula de controle de tração para amortecedor hidráulico Download PDFInfo
- Publication number
- WO2011120119A1 WO2011120119A1 PCT/BR2011/000091 BR2011000091W WO2011120119A1 WO 2011120119 A1 WO2011120119 A1 WO 2011120119A1 BR 2011000091 W BR2011000091 W BR 2011000091W WO 2011120119 A1 WO2011120119 A1 WO 2011120119A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- ccp
- pressure chamber
- back pressure
- chamber
- 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.)
- Ceased
Links
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
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- 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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
-
- 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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/504—Inertia, i.e. acceleration,-sensitive means
-
- 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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5126—Piston, or piston-like valve elements
Definitions
- the present invention relates to a valve to be applied to a hydraulic damper for the suspension of cargo or passenger road vehicles, to allow adequate control of the flow of hydraulic fluid within it during the distancing movements of the vehicle.
- shock absorber not only under the usual operating conditions caused by low-frequency, high-frequency motion, but also when the vehicle's body is tilted vertically upwards in high-frequency, low-frequency motion such as when the vehicle is it travels over large undulating road surfaces.
- Double acting telescopic hydraulic dampers commonly used in road vehicle suspension systems for transporting people or loads, have predefined damping factors during manufacture to reduce the usual vertical oscillations are well known in the art. of low amplitude and high frequency of the vehicle body, induced by the irregularities of the road surface on which the vehicle is made to travel.
- a deficiency of known telescopic shock absorbers, having a predetermined damping factor, results from their poor sensitivity to large amplitude, low frequency oscillatory body movements, which occur when the vehicle travels over a large undulating rolling surface.
- This vehicle displacement condition causes upward movement of the body which is not adequately dampened by the state of the art dampers as the pre-established damping factors do not contemplate dampening wide amplitude and low frequency oscillations.
- State-of-the-art telescopic shock absorbers of the bi-tubular or mono-tubular type as illustrated in Figures 1 and 2 comprise a pressure tube 10 into which a piston 20 is slidably mounted which divides the pressure tube. 10 in an inferiorly disposed dc compression chamber and a superiorly disposed traction chamber CT, said chambers containing a hydraulic fluid, that is, an incompressible viscous fluid and being bidirectionally communicated with each other by means of axial passages and pressure valves. (not shown) provided on piston 10.
- the piston 20 generally comprises a low flow resistance passage of the hydraulic fluid (viscous fluid) contained in the pressure tube 10 during the telescopic compression movement, and a check valve. control of hydraulic fluid passage, when the telescopic traction movement, that is, of the damper extension.
- hydraulic fluid viscous fluid
- the upper end of the pressure tube 10 is closed by an annular sealing plate 11, generally associated with a sealing seal 12 through which a rod 30 is axially displaced whose end, internal to the pressure tube 10, is fixed to the piston 20.
- the pressure tube 10 has a lower end enclosed by a valve plate 13, provided with a pair of passages (not shown), one of which housing a compression valve, while the other passage houses a traction valve, said valves are not illustrated because they are not part of the present invention.
- the hydraulic fluid reservoir R is usually formed by a reservoir tube 40 co-axially positioned around the pressure tube 10 and partially filled with the hydraulic fluid (incompressible viscous fluid) and supplemented with a compressible gas which, by its compression, compensates for it. the volume occupied by the rod 30 inside the traction chamber CT during reciprocating movement of the piston 20.
- the reservoir tube 40 has its sealed ends consolidating the structure of the bi-tubular damper and a protective tube 45 may be provided, axially positioned around reservoir tube 40 to protect piston rod 30 from impacts of rocks and other thrown objects against vehicle suspension.
- the reservoir R is replaced by a gas chamber CG defined within the pressure tube 10 itself and which is separated from the compression chamber CC by a floating piston 35.
- the chamber GC gas contains a compressible fluid and operates by varying its volume by the displacement of the floating piston 35 to compensate for the volume variation caused by reciprocating movement of the rod 30 within the CT traction chamber.
- the degree or damping factor is defined by the sizing of the control valves, particularly the traction control valve provided on the piston 20, to regulate the flow of hydraulic fluid ( viscous fluid) from the traction chamber CT to the DC compression chamber when the damper is extended, ie when the vehicle body is shifted upwards with a certain acceleration.
- Said traction control valve is sized to provide a predetermined degree of restriction to the passage of hydraulic fluid flow when it is driven by upward, low amplitude and high frequency oscillations of piston 20 which occur upon usual vehicle displacement. by the road surfaces normally encountered in the vehicle's operating regions.
- the traction flow control valve It is not capable of causing the desired flow restriction of the hydraulic fluid to prevent the lifting of the vehicle body under accelerated conditions detrimental to passenger comfort and safety of the load on the moving vehicle.
- the degree or damping factor provided by these dampers is not capable of producing, within a wide range of frequencies and amplitudes, adequate damping to the upward and accelerated vertical oscillations of the body. Accelerated, low frequency, high amplitude oscillations are not prevented or minimized by the well-known two- tubular. This operational limitation allows the body to swing upwards under undesirable acceleration conditions in terms of comfort and safety when the vehicle is passing through large undulations.
- shock absorbers with electronically controlled electromagnetic valves are also known in the art to control the flow of hydraulic fluid during damper operation under rolling conditions, these shock absorbers have the major drawback of their complex construction. and high cost.
- the present invention aims to provide a traction control valve, of simple construction and easily adaptable to the shock absorber piston, in order to hydraulically brake the upward movements of the vehicle body under different operating conditions, associated with oscillations with wide amplitude and frequency ranges.
- the traction control valve in question permits the provision of automatic and additional control of the hydraulic fluid flow within the damper, depending on the inertial forces to which the control valve is subjected when the upward travel of the damper is achieved. bodywork from a certain acceleration.
- the present invention further has the additional object of providing an inertial traction control valve as mentioned above that can be easily adapted to the damper piston to replace the usual traction control valve which is produced with a predetermined damping factor or degree for each damper application.
- the traction control valve in question is applied to a hydraulic damper of the type comprising an internally divided pressure tube in a compression chamber and a traction chamber by a piston axially hollowed by a traction passage.
- the traction control valve in question comprises a piston-loaded back pressure chamber provided with an upper opening, a lower control seat and a relief port open to the pressure chamber. compression; sealing piston, axially hollow and displaceable, within the back pressure chamber, between a closed position, blocking communication through the upper opening between the.
- traction passage and compression chamber and keeping the former in communication with the back pressure chamber through the sealing piston and open positions communicating the traction passage with the compression chamber; a return spring attached to the piston and forcing the sealing piston into its closed position; an inertial seal to be moved down into the back pressure chamber from an inoperative position away from the control seat to an operating position, locking the control seat and raising the hydraulic pressure in the back pressure chamber in order to hydraulically force the sealing piston into its closed position in the same direction as the return spring when the piston is subjected to a certain upward acceleration; and a control spring provided in the back pressure chamber and forcing the inertial seal into its inoperative position.
- the above-defined traction control inertial valve construction allows it to be easily incorporated into the telescopic hydraulic damper structure, and the damper to hydraulically brake not only the usual low amplitude, high frequency strain travels , as well as large amplitude, low frequency strain movements when the hydraulic pressure inside the back pressure chamber is increased by the inertial displacement of the control seal acting in conjunction with the closing spring to keep the passage of hydraulic fluid from the traction chamber to the compression chamber when the piston-traction control valve assembly is shifted upward with a certain acceleration.
- the solution proposed by the present invention allows the closing spring to be automatically increased with the help of hydraulic force, increasing the damping damping factor when the vehicle body is subjected to a certain degree of upward acceleration relative to the wheels of the vehicle. vehicle.
- Figure 1 is a longitudinal, schematic cross-sectional view of a bi-tubular hydraulic damper constructed in accordance with the prior art
- Figure 2 is a longitudinal, schematic cross-sectional view of a mono-tubular hydraulic damper constructed in accordance with the prior art.
- Figure 3 is a partly enlarged longitudinal and partial cross-sectional view of the pressure tube of a two-tube or single-tube damper as shown in figures 1 and 2, but with its piston provided with the inertial control valve. of traction flow object of the present invention.
- the invention is applied to double acting telescopic, bi-tubular or single-tube hydraulic dampers as previously described with reference to figures 1 and 2 of the accompanying drawings.
- the traction control valve may be applied to a bi-tubular or single-tube hydraulic damper and, as shown in Figure 3, is associated with a piston 20 which is axially hollowed by a compression passage 21. and by a traction passage 22.
- the compression passage 21 is operatively associated with a check valve 23, of known construction, which operates to allow low strength hydraulic fluid flow from the DC compression chamber to the CT traction chamber upon telescopic compression movement. damper and to prevent hydraulic fluid from flowing in the reverse direction when telescoping or pulling the damper.
- the traction passage 22 is sized to operate in conjunction with the control valve in question, restricting the hydraulic fluid flow from the CT traction chamber to the DC compression chamber when the damper is extended.
- the traction control valve comprises: a piston-loaded CCP back-pressure chamber 20, preferably defined by a tubular body 50 having a cylindrical side wall 51, defining an upper opening 51a, and a radial clearance with the pressure tube 10 within the DC compression chamber and further a bottom wall 52 through which a control seat 55 is formed.
- At least one of the portions defined by the cylindrical side walls 51 and bottom 52 is provided with a relief port 56 to maintain constant and restricted fluid communication between the CCP back pressure chamber and the DC compression chamber, regardless of position.
- an sealing piston 60 is mounted, axially hollow and displaceable between a closed position, blocking communication through the upper opening 51a between the traction passage 22 and the DC compression chamber, and maintaining the tensile passage 22 in communication with the CCP back pressure chamber through sealing piston 60, and open positions, in which it allows communication of the tensile passage 22 with the DC compression chamber and also with the interior of the CCP back pressure chamber through the axially hollow sealing piston 60.
- a return spring 65 is attached to the piston 20 to force the sealing piston 60 to its closed position, in which it blocks fluid communication between the CT and CC compression chambers via the pull passage 22 when the piston 20 is subjected to upward dislocations with a degree of acceleration corresponding to the usual telescopic damper oscillations, with low amplitude and high frequency, usually considered in the dimensioning of the damper and particularly of the return spring 65.
- the control valve in question further comprises an inertial seal 70 to be moved down into the CCP back pressure chamber from an inoperative position away from the control seat 55 to an operating position in which it locks the control valve.
- control seat 55 by raising the hydraulic pressure in the CCP back pressure chamber so that sealing piston 60 is hydraulically forced into its closed position in the same direction as return spring 65 when piston 20 undergoes a certain acceleration which usually occurs when the damper is subjected to large amplitude, low frequency telescopic oscillations, giving a greater degree of damping to the damper than that obtained exclusively by actuation of the return spring 65.
- the control valve further comprises a control spring 75 provided in the CCP back pressure chamber and forcing the inertial seal 70 to its inoperative position in which the CCP back pressure chamber is maintained in fluid communication with the compression chamber.
- DC ie insufficient hydraulic pressure to act against sealing piston 60.
- inertial seal 70 is defined by a cylindrical block 71 loosely mounted within the CCP back pressure chamber and incorporating projecting radial portions 71a slidingly seated against the cylindrical sidewall 51 of the tubular body 50, said cylindrical block 71 having an inertial mass capable of sliding downwardly against the action of control spring 75 to block control seat 55 when piston 20 is subjected to said upward acceleration.
- control seat 55 may be defined by a through hole 55a provided in the bottom wall 52 of the tubular body 50.
- the cylindrical block 71 is provided with an inverted frusto-conical lower projection 72. , and which is sized and positioned to fit into the through hole 55a of the control seat 55, locking the latter when the inertial seal 70 is moved to its operative position, not shown in Figure 3.
- the relief port 56 may be defined by a groove 56a provided along the lower projection 72 of the inertial seal 70 and further in the lower region thereof to maintain restricted fluid communication between the chambers. CCP and CC compression, even with the lower projection 72 of the inertial seal 70 fitted into the through hole 55a. This avoids the blocking of the shock absorber traction movement.
- relief holes 56 may be provided, provided not only in the control seat 55 itself but also in other parts of the tubular body 50.
- the damper comprises a rod 30 having an inner end 31 attached to the piston 20 and a outer end 32 to be attached to a vehicle body not shown.
- the inner end 31 of the rod 30 incorporates an axial extension 33 extending beyond the piston 20 into the CCP back pressure chamber through the sealing piston 60, the tubular body 50 being of the CCP back pressure chamber and return spring 65 mounted to said axial extension 33 of rod 30.
- the tubular body 50 of the CCP back pressure chamber comprises: an upper cup portion 50A housing the sealing piston 60 and the return spring 65 and having a lower wall 57 secured by a nut 36 to the axial extension 33 of the rod 30 and provided with at least one through opening 57a; and a lower cup portion 50B, upper and hermetically fixed to the upper cup portion 50A, housing the inertial seal 70 and having its lower wall 58 defined by the bottom wall 52 of the tubular body 50.
- the lower wall 57 of the upper cup portion 50A is axially pressed against a tubular spacer 80, preferably metallic, disposed around the axial extension 33 of the rod 30 and seated against the piston 20, said spring.
- return 65 being mounted around the tubular spacer 80, between the bottom wall 57 and the sealing piston 60, which is axially hollow through a central opening 66 through which the tubular spacer 80 and the axial extension 33 of the rod 30 are loosely disposed. allowing the CCP back pressure chamber to be pressurized by hydraulic fluid. flowing through the tensile passage 22 when the sealing piston 60 is in its closed position.
- sealing plunger 60 may be in the form of an inverted cylindrical cup with its side wall hanging carrying at least one resilient sealing ring 67 cooperating with side wall 51 of tubular body 50.
- the tubular body 50 of the CCP back pressure chamber has an upper edge 53 axially spaced from the piston 20 and thereby defining the upper opening 51a of the CCP back pressure chamber which, in the illustrated construction example, is between the upper edge 53 of the tubular body 50 and an annular seat 28 incorporated into the piston 20 open for the pull passage 22 and against which the sealing piston 60 is seated in its closed position, blocking direct fluid communication between the tensile passage 22 and the DC compression chamber.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2012141462/11A RU2575910C2 (ru) | 2010-04-01 | 2011-03-30 | Клапан-регулятор сцепления для гидравлического гасителя колебаний |
| CN201180018123.2A CN102859227B (zh) | 2010-04-01 | 2011-03-30 | 用于液力减震器的牵引控制阀 |
| CA2793249A CA2793249A1 (en) | 2010-04-01 | 2011-03-30 | Traction control valve for hydraulic shock absorber |
| HK13107288.1A HK1180028B (en) | 2010-04-01 | 2011-03-30 | Extension control valve for hydraulic damper |
| EP11761849.6A EP2554870A4 (en) | 2010-04-01 | 2011-03-30 | RELATIVE CONTROL VALVE FOR HYDRAULIC SHOCK ABSORBER |
| JP2013501566A JP2013524106A (ja) | 2010-04-01 | 2011-03-30 | 油圧緩衝器用の牽引制御弁 |
| US13/637,749 US9151353B2 (en) | 2010-04-01 | 2011-03-30 | Traction control valve for hydraulic shock absorber |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1001136A BRPI1001136A8 (pt) | 2010-04-01 | 2010-04-01 | Válvula de controle de tração para amortecedor hidráulico |
| BRPI1001136-6 | 2010-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011120119A1 true WO2011120119A1 (pt) | 2011-10-06 |
Family
ID=44711248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2011/000091 Ceased WO2011120119A1 (pt) | 2010-04-01 | 2011-03-30 | Válvula de controle de tração para amortecedor hidráulico |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9151353B2 (pt) |
| EP (1) | EP2554870A4 (pt) |
| JP (1) | JP2013524106A (pt) |
| CN (1) | CN102859227B (pt) |
| BR (1) | BRPI1001136A8 (pt) |
| CA (1) | CA2793249A1 (pt) |
| WO (1) | WO2011120119A1 (pt) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9222539B1 (en) | 2014-08-14 | 2015-12-29 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9239092B2 (en) | 2013-08-26 | 2016-01-19 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9441700B2 (en) | 2014-08-14 | 2016-09-13 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9500255B2 (en) | 2014-02-28 | 2016-11-22 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9638280B2 (en) | 2013-08-26 | 2017-05-02 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011045754A1 (en) * | 2009-10-14 | 2011-04-21 | Antonino Cultraro | Linear shock absorber |
| RU2571145C1 (ru) * | 2014-08-01 | 2015-12-20 | Акционерное общество "Авиаагрегат" | Поглощающий аппарат |
| RU2570988C1 (ru) * | 2014-08-26 | 2015-12-20 | Акционерное общество "Авиаагрегат" | Аппарат поглощающий эластомерный |
| DE102016208844A1 (de) | 2016-05-23 | 2017-11-23 | Thyssenkrupp Ag | Frequenzselektiver Schwingungsdämpfer für Kraftfahrzeuge mit einem Bypasssteuerventil |
| DE102018115177B3 (de) * | 2018-06-25 | 2019-07-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventilblock für eine aktive Fahrwerksdämpfung und Verfahren zur Montage eines Stoßdämpfers für eine aktive Fahrwerksdämpfung |
| JP2023016714A (ja) * | 2021-07-21 | 2023-02-02 | スタビラス ゲ―エムベーハー | 切換ピストンを備えた流体ダンパ、流体ダンパの製造方法、および流体ダンパを備えた駆動装置 |
| CN116275133B (zh) * | 2023-01-16 | 2025-04-29 | 南京铖联激光科技有限公司 | 3d打印机基板自动紧固装置 |
| CN119531917B (zh) * | 2024-10-10 | 2025-08-01 | 河南德佰特机电设备制造有限公司 | 一种高稳定性的组合式液压支撑装置及其液压系统 |
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| GB2090948A (en) * | 1981-01-14 | 1982-07-21 | Fichtel & Sachs Ag | Vibration damper valve |
| GB2111168A (en) * | 1981-11-06 | 1983-06-29 | Tokico Ltd | Hydraulic damper with bypass |
| DE4302623A1 (de) * | 1993-01-30 | 1994-08-04 | Bilstein August Gmbh Co Kg | Hydraulischer Schwingungsdämpfer für Kraftfahrzeuge |
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| US1268452A (en) * | 1913-09-19 | 1918-06-04 | Watson E Goodyear | Shock-absorber. |
| GB211168A (en) * | 1923-02-12 | 1924-05-15 | Jean Baptiste Perrin | Improvements in telescopes for the observation of aerial objects |
| DE1505608A1 (de) * | 1951-01-28 | 1970-07-09 | Bilstein August Fa | Stufenlos regelbare Daempfungsvorrichtung,insbesondere fuer hydropneumatische Federbeine |
| US2729308A (en) * | 1952-01-05 | 1956-01-03 | Gabriel Co | Multiple stage shock absorber |
| FR1331741A (fr) * | 1962-08-10 | 1963-07-05 | Sélecteur d'action d'amortisseur | |
| FR2404772A1 (fr) * | 1977-09-28 | 1979-04-27 | Devacht Andre | Amortisseur hydraulique |
| US5058715A (en) * | 1988-11-28 | 1991-10-22 | Ilan Silberstein | Shock absorber |
| US5332068A (en) * | 1990-04-03 | 1994-07-26 | Richardson Technologies, Ltd. | Self contained automatic terrain condition adjusting shock absorber |
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| JPH05141470A (ja) * | 1991-11-20 | 1993-06-08 | Tokico Ltd | 減衰力調整式油圧緩衝器 |
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| CN101688580A (zh) * | 2007-03-20 | 2010-03-31 | 维克多·汉纳蒂耶维奇·帕勒沃泽夫 | 调节减振器中的阀容量的方法及具有可调节阀容量的减振器 |
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-
2010
- 2010-04-01 BR BRPI1001136A patent/BRPI1001136A8/pt not_active IP Right Cessation
-
2011
- 2011-03-30 US US13/637,749 patent/US9151353B2/en not_active Expired - Fee Related
- 2011-03-30 CA CA2793249A patent/CA2793249A1/en not_active Abandoned
- 2011-03-30 JP JP2013501566A patent/JP2013524106A/ja not_active Withdrawn
- 2011-03-30 EP EP11761849.6A patent/EP2554870A4/en not_active Withdrawn
- 2011-03-30 WO PCT/BR2011/000091 patent/WO2011120119A1/pt not_active Ceased
- 2011-03-30 CN CN201180018123.2A patent/CN102859227B/zh not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2090948A (en) * | 1981-01-14 | 1982-07-21 | Fichtel & Sachs Ag | Vibration damper valve |
| GB2111168A (en) * | 1981-11-06 | 1983-06-29 | Tokico Ltd | Hydraulic damper with bypass |
| DE4302623A1 (de) * | 1993-01-30 | 1994-08-04 | Bilstein August Gmbh Co Kg | Hydraulischer Schwingungsdämpfer für Kraftfahrzeuge |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2554870A4 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9239092B2 (en) | 2013-08-26 | 2016-01-19 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9638280B2 (en) | 2013-08-26 | 2017-05-02 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9500255B2 (en) | 2014-02-28 | 2016-11-22 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9222539B1 (en) | 2014-08-14 | 2015-12-29 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
| US9441700B2 (en) | 2014-08-14 | 2016-09-13 | Tenneco Automotive Operating Company Inc. | Shock absorber with frequency dependent passive valve |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2554870A1 (en) | 2013-02-06 |
| BRPI1001136A2 (pt) | 2011-11-22 |
| CN102859227A (zh) | 2013-01-02 |
| JP2013524106A (ja) | 2013-06-17 |
| BRPI1001136A8 (pt) | 2017-09-12 |
| US9151353B2 (en) | 2015-10-06 |
| CA2793249A1 (en) | 2011-10-06 |
| US20130248307A1 (en) | 2013-09-26 |
| EP2554870A4 (en) | 2015-10-28 |
| HK1180028A1 (en) | 2013-10-11 |
| CN102859227B (zh) | 2014-12-24 |
| RU2012141462A (ru) | 2014-05-27 |
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