WO2006010207A1 - Refroidissement des systèmes de suspension de véhicule - Google Patents

Refroidissement des systèmes de suspension de véhicule Download PDF

Info

Publication number
WO2006010207A1
WO2006010207A1 PCT/AU2005/001100 AU2005001100W WO2006010207A1 WO 2006010207 A1 WO2006010207 A1 WO 2006010207A1 AU 2005001100 W AU2005001100 W AU 2005001100W WO 2006010207 A1 WO2006010207 A1 WO 2006010207A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
vehicle suspension
suspension apparatus
cavity
flow
Prior art date
Application number
PCT/AU2005/001100
Other languages
English (en)
Inventor
Graeme Kershaw Robertson
Original Assignee
Graeme Kershaw Robertson
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
Priority claimed from AU2004904265A external-priority patent/AU2004904265A0/en
Application filed by Graeme Kershaw Robertson filed Critical Graeme Kershaw Robertson
Publication of WO2006010207A1 publication Critical patent/WO2006010207A1/fr

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
    • F16F9/42—Cooling arrangements
    • 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
    • B60G17/002—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 by temperature regulation of the suspension unit, e.g. heat operated systems
    • 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
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/0408—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics details, e.g. antifreeze for suspension fluid, pumps, retarding means per se
    • 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
    • F16F9/063—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid comprising a hollow piston rod
    • 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
    • F16F9/064—Units characterised by the location or shape of the expansion chamber

Definitions

  • This invention relates generally to vehicle suspension systems, especially suspension systems of a type suitable for use in heavy duty applications such as off-road racing vehicles.
  • suspension systems especially suspension systems of a type suitable for use in heavy duty applications such as off-road racing vehicles.
  • the principals of the invention are equally applicable to other applications, such as suspension systems for motor bikes and other vehicles.
  • a well known difficulty with suspension systems is over-heating of suspension components, especially reciprocating components such as fluid or gas cushioning damping units.
  • suspension components especially reciprocating components such as fluid or gas cushioning damping units.
  • Local temperatures of up to 200 0 C or even higher have been observed: at these temperatures consequential effects such as local or bulk vaporization, gas expansion and seal failure tend to diminish the effectiveness of a suspension system and may even result in partial or substantially complete failure.
  • Conventional cooling devices such as heat dissipation fins, cooling fluid jackets, and forced ventilation can be useful in reducing peak temperatures but have been found wanting under heavy load conditions.
  • a vehicle suspension apparatus including: relatively reciprocably moveable first and second parts; motion damping means that includes valve means through which fluid is forced, at respective predetermined controlled flow rates, during said relative reciprocal movement of said parts so as to dampen said movement; a fluid cooling circuit including a first fluid flow path associated with said valve means whereby, during said relative reciprocal movement in at least one direction, a portion of said fluid is forced along said first flow path, whereby to pump the fluid in said fluid cooling circuit; and cooling means for cooling said fluid circulated in said cooling circuit.
  • the invention further provides, in a second aspect, a vehicle suspension apparatus including motion damping means that is fluid-filled in operation and has a pair of relatively moveable parts and valve means permitting flow of said fluid between said parts, said parts comprising a first part and a second part in which the first part is receivable, whereby the parts are arranged for relative retracting and extending movement during which fluid is forced through said valve means at respective predetermined controlled flow rates so as to dampen the movement; wherein said relatively moveable parts contain respective primary chambers for said fluid, and said first part is smaller in cross-section than said second part to define an intermediate chamber at least partly about the first part within the second part; and wherein said apparatus further includes a fluid cooling circuit having a first flow path through said valve means, between said primary chamber of the second part and said intermediate chamber, along which first flow path said fluid is forced during said movement in one direction, whereby to pump the fluid in said fluid cooling circuit, and a second flow path between said primary chamber of the second part and said intermediate chamber, which second flow path has means for cooling said fluid as
  • the circulation of said fluid in said cooling circuit does not substantially diminish the damping action of said motion damping means, or otherwise compromise the performance of the suspension apparatus.
  • the cooling means may comprise, for example, fins, a heat-exchanger, a labyrinthine flow path or any other suitable arrangement to allow said fluid to shed or dissipate heat to the environs or to another medium.
  • the first and second parts comprise telescopically interengaged tubes respectively of relatively smaller and larger diameter.
  • the valve means is then conveniently provided in a valve body fixed at an inner end of the tube comprising said first part.
  • the valve means preferably includes respective sets of shims in part determining said respective predetermined controlled flow rates and further determining the respective directions of flow.
  • the apparatus further includes pressurised gas cushioning means including structure defining a first cavity for storing a pressurised gas and a second cavity for storing a fluid under pressure, and a floating piston sealingly separating said cavities, wherein the second cavity is in fluid flow communication with the motion damping means.
  • pressurised gas cushioning means including structure defining a first cavity for storing a pressurised gas and a second cavity for storing a fluid under pressure, and a floating piston sealingly separating said cavities, wherein the second cavity is in fluid flow communication with the motion damping means.
  • the first part of the motion damping means and the aforesaid structure of the pressurised gas cushioning means are integral whereby the second cavity and the primary chamber of the first part comprise a single chamber. More conveniently, the first part of the motion damping means and the structure of the pressurised gas cushioning means are provided by a single tube.
  • valve means is such that the respective predetermined controlled flow rates in the respective directions are different whereby to vary the damping characteristics according to whether the movement is relative retracting or extending movement.
  • the invention entails the concept of utilising the suspension unit itself as it is caused to move, in use, as the power source in a secondary fluid circuit in which one or more side streams of the working fluid are circulated and cooled.
  • vehicle suspension apparatus is an integral suspension unit that would typically be one of a number of such units collectively providing a suspension system in a vehicle such as, for example, as described in the international patent publication WO 02/27211.
  • the units may be acting individually or be linked in a fluid circuit to provide a managed and balanced suspension response.
  • the suspension unit 10 has a first cylindrical tube 12 telescopically received within a second cylindrical tube 14 so that the two tubes are mutually reciprocably moveable.
  • Tube 12 is connected to tube 14 through a head 13 of tube 14 that includes a sealing configuration 17 about tube 12.
  • Tube 12 is provided, in this case at the outboard or proximal end, with a filling valve 18 for introducing gas, such as air, nitrogen or similar, under pressure into the tube 12 to fill a first cavity or chamber 20 defined by the tube 12 at the proximal end of tube 12 for storing gas under pressure.
  • a double- sided floating piston 22, with O-ring seals 22a is provided intermediate the ends of tube 12.
  • the first chamber 20 is formed between the filling valve 18 and the piston 22.
  • a second chamber 24 is formed between piston 22 and the inner or distal end of tube 12. Hydraulic fluid fills the second chamber 24 of tube 12.
  • a double-acting valve arrangement 26 is provided in a valve body 25 at or towards the inner or distal end of tube 12.
  • Valve body 25 slidably engages the cylindrical interior surface 15 of outer tube 14 and separates the chamber 24 from a chamber 29 defined within tube 14 between valve body 25 and an end cap 27 that seals the end of the tube 14.
  • chambers 24 and 29 are referred to as the primary chambers of tubes 12 and 14, respectively.
  • the valve body 25 moves through the hydraulic fluid or the hydraulic fluid moves through the valve body in accordance with corresponding movement of tube 12, depending on whether the valve body 2 is fixed or free to move.
  • the valve body 25 is fixed about the end of tube 12 by transverse fastening screws (not shown) and moves therewith.
  • Tube 12 is appreciably smaller in cross-section than the tube 14 so that an intermediate variable-volume annular chamber 52 is provided within the tube 14 and about the tube 12 between the head 13 and the valve body 2.
  • the individual valving of the valve arrangement 26 is such as to allow fluid to flow in one direction at one rate when tube 12 moves in a first axial direction relative to the tube 14 and to flow in the opposite direction at a second rate when tube 12 moves in the opposite relative direction.
  • the rate of movement of fluid through the valving is dependent on the number, size and arrangement of the apertures, ports or ducts 40, 42, 50, and on any flow control elements, which, in this embodiment comprise shims 4 and 55, forming the actual valving of valve arrangement 26.
  • the valving may comprise one-way valves of a different type, such as spring loaded ball valves.
  • the annular non-return shim set 57 in chamber 52 opens the ducts 50 so that fluid is able to pass into the chamber 52, and shims 54 close the ports 40, and the compressed gas in the chamber 20 causes the piston 22 to move thereby causing fluid to flow from chamber 24 into chamber 29 through a second series of oblique ports 42 controlled by shims 55.
  • Both ends of the integrated unit 10 are provided with suitable fittings such as the fitting eye 31 to enable the unit 10 to be located in place as part of the suspension system of a motor vehicle or the like. It is to be noted that any suitable fitting 27 can be provided at either or both ends of this form of the unit: exemplary fittings are illustrated.
  • the outboard end of damping tube 14 is mounted to suspension components of the vehicle, or to other components by which the unit is connected either directly or indirectly to a road wheel of the vehicle. As the wheel traverses the ground, the tube 14 moves in accordance with the relative vertical movement of the vehicle wheel as it moves over the terrain.
  • the outboard end of tube 12 may be connected to the chassis or body work of the motor vehicle, or other fixed component, and is thus relatively fixed in place.
  • the unit is of the general kind disclosed in international patent publication WO 02/27211 and is capable of independently supporting a suspended load.
  • the unit has utility as a shock absorber auxiliary to primary suspension devices such as suspension springs.
  • the length of combined unit 10 is increased by tubes 12 and 14 telescopically expanding with respect to each other, thereby allowing fluid to move from chamber 24 into tube 14, which reduces the amount of fluid in chamber 24 allowing piston 22 to move under the increased gas pressure of the compressed gas stored in chamber , which in turn reduces the compression or gas pressure of the gas in chamber . Further fluid is pumped into tube 14 until all of the pressures equilibrate. The rate at which fluid can flow through valve arrangement 26 limits the amount of travel of the road wheel in the substantially vertically downward direction.
  • Circuit 60 further includes a second, external, flow path 62 between chamber 52 and chamber 29 that incorporates, firstly, respective one-way or non-return valves 64 and 65 at the outlet from chamber 52 and the intake to chamber 29, and, secondly, a cooling means 100 of any suitable type for cooling the fluid in circuit 60.
  • Suitable cooling units 100 comprise, for example, cooling fins, a heat-exchanger, a labyrinthine flow path or any other suitable arrangement to allow the fluid to dissipate or shed heat to the environs or to another medium.
  • the illustrated arrangement utilises the pumping action of the outer part of the valve body 25 as the driving energy source in a side circuit 60 in which a proportion of the hydraulic fluid in the system is systematically and continuously cooled with each cycle of movement of the suspension unit 10 without substantially restricting the performance of the suspension. It is found empirically that the arrangement can lower peak temperatures in a vehicle suspension system under severe load, for example, in off-road racing, from temperatures of the order of 200°C to a figure nearer ambient temperature.
  • chamber 52 is preferably of a volume substantially smaller than the volumes of either chamber 24 or chamber 29.

Landscapes

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

Abstract

La suspension de véhicule selon l’invention a une unité d'amortissement de mouvement (10) qui, en fonctionnement, est remplie de fluide et comprend une paire de pièces tubulaires (12, 14) mobiles l'une par rapport à l'autre et télescopiques et un système de valve (26) qui permet la circulation du fluide entre les pièces tubulaires (12, 14). Les pièces tubulaires (12, 14) sont disposées de façon à rentrer et sortir l'une par rapport à l'autre, mouvements qui forcent le fluide à passer par ledit système de valve (26) avec des débits prédéterminés et contrôlés afin d'amortir le mouvement. L'unité (10) comprend en outre un circuit de refroidissement (60) du fluide ayant une première voie de passage (50) à travers le système de valve (26) entre une chambre primaire (29) de l'un des tubes (14) et une chambre intermédiaire annulaire (52). Le mouvement relatif des tubes (12, 14) oblige le fluide à suivre la voie de passage (50) dans un sens pour pomper ainsi le fluide dans le circuit de refroidissement (60) du fluide qui a des moyens pour refroidir le fluide pendant sa circulation.
PCT/AU2005/001100 2004-07-29 2005-07-27 Refroidissement des systèmes de suspension de véhicule WO2006010207A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004904265A AU2004904265A0 (en) 2004-07-29 Cooling of vehicle suspension systems
AU2004904265 2004-07-29

Publications (1)

Publication Number Publication Date
WO2006010207A1 true WO2006010207A1 (fr) 2006-02-02

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PCT/AU2005/001100 WO2006010207A1 (fr) 2004-07-29 2005-07-27 Refroidissement des systèmes de suspension de véhicule

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012066081A1 (fr) * 2010-11-20 2012-05-24 Zf Friedrichshafen Ag Amortisseur de vibrations muni d'un dispositif capteur
EP2481276A1 (fr) * 2011-02-01 2012-08-01 CLAAS Saulgau GmbH Agrégat de hachage pour moissonneuses automobiles
CN103573901A (zh) * 2012-08-04 2014-02-12 李天维 自冷却式阻尼器
CN103697103A (zh) * 2014-01-10 2014-04-02 李吉 一种自散热油缸阻尼装置
WO2015157689A1 (fr) * 2014-04-11 2015-10-15 Oshkosh Defense, Llc Élément de suspension
EP2052889B1 (fr) 2007-10-26 2016-06-15 Strömsholmen AB Dispositif hydropneumatique à ressort-amortisseur et procédé de fonctionnement d'un dispositif hydropneumatique à ressort-amortisseur
US20160348748A1 (en) * 2011-03-03 2016-12-01 Fox Factory, Inc. Cooler for a suspension damper
GB2557903A (en) * 2014-04-11 2018-07-04 Oshkosh Defence Llc Suspension element
WO2019097210A1 (fr) * 2017-11-16 2019-05-23 Bae Systems Plc Jambe de suspension
CN109812531A (zh) * 2018-12-29 2019-05-28 清科智能悬架***（苏州）有限公司 一种液压主动式减震器
CN111237376A (zh) * 2020-02-20 2020-06-05 唐山保靓汽车配件有限公司 用于减震器的散热装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1500516A (en) * 1974-01-22 1978-02-08 Marzocchi A Shock-absorber
US4629169A (en) * 1983-12-14 1986-12-16 S.A.M.M. - Societe D'applications Des Machines Motrices Hydropneumatic oleopneumatic vehicle suspension element
FR2640339A1 (fr) * 1988-12-09 1990-06-15 Peugeot Amortisseur hydraulique destine a equiper un organe de suspension, par exemple d'un vehicule automobile
JPH08177935A (ja) * 1994-12-26 1996-07-12 Mitsubishi Motors Corp ショックアブソーバ冷却構造
JPH1078073A (ja) * 1996-08-30 1998-03-24 Tokico Ltd 油圧緩衝器
JPH11173360A (ja) * 1997-12-10 1999-06-29 Showa Corp 冷却機構付き油圧緩衝器
WO2002027211A2 (fr) * 2000-09-28 2002-04-04 Graeme K Robertson Systeme de suspension
EP1125069B1 (fr) * 1998-10-27 2004-02-18 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Amortisseur de vibrations a haute performance

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1500516A (en) * 1974-01-22 1978-02-08 Marzocchi A Shock-absorber
US4629169A (en) * 1983-12-14 1986-12-16 S.A.M.M. - Societe D'applications Des Machines Motrices Hydropneumatic oleopneumatic vehicle suspension element
FR2640339A1 (fr) * 1988-12-09 1990-06-15 Peugeot Amortisseur hydraulique destine a equiper un organe de suspension, par exemple d'un vehicule automobile
JPH08177935A (ja) * 1994-12-26 1996-07-12 Mitsubishi Motors Corp ショックアブソーバ冷却構造
JPH1078073A (ja) * 1996-08-30 1998-03-24 Tokico Ltd 油圧緩衝器
JPH11173360A (ja) * 1997-12-10 1999-06-29 Showa Corp 冷却機構付き油圧緩衝器
EP1125069B1 (fr) * 1998-10-27 2004-02-18 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Amortisseur de vibrations a haute performance
WO2002027211A2 (fr) * 2000-09-28 2002-04-04 Graeme K Robertson Systeme de suspension

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2052889B1 (fr) 2007-10-26 2016-06-15 Strömsholmen AB Dispositif hydropneumatique à ressort-amortisseur et procédé de fonctionnement d'un dispositif hydropneumatique à ressort-amortisseur
WO2012066081A1 (fr) * 2010-11-20 2012-05-24 Zf Friedrichshafen Ag Amortisseur de vibrations muni d'un dispositif capteur
EP2481276A1 (fr) * 2011-02-01 2012-08-01 CLAAS Saulgau GmbH Agrégat de hachage pour moissonneuses automobiles
US10718397B2 (en) 2011-03-03 2020-07-21 Fox Factory, Inc. Cooler for a suspension damper
US20160348748A1 (en) * 2011-03-03 2016-12-01 Fox Factory, Inc. Cooler for a suspension damper
EP2495472A3 (fr) * 2011-03-03 2017-09-06 Fox Factory, Inc. Refroidisseur pour amortisseur de suspension
US10975929B2 (en) 2011-03-03 2021-04-13 Fox Factory, Inc. Cooler for a suspension damper
CN103573901A (zh) * 2012-08-04 2014-02-12 李天维 自冷却式阻尼器
CN103697103A (zh) * 2014-01-10 2014-04-02 李吉 一种自散热油缸阻尼装置
US10350956B2 (en) 2014-04-11 2019-07-16 Oshkosh Defense, Llc Suspension element
WO2015157689A1 (fr) * 2014-04-11 2015-10-15 Oshkosh Defense, Llc Élément de suspension
GB2557903B (en) * 2014-04-11 2020-03-18 Oshkosh Defence Llc Suspension element
GB2557903A (en) * 2014-04-11 2018-07-04 Oshkosh Defence Llc Suspension element
US10974561B2 (en) 2014-04-11 2021-04-13 Oshkosh Defense, Llc Suspension element
US9944145B2 (en) 2014-04-11 2018-04-17 Oshkosh Defense, Llc Suspension element
US11738615B2 (en) 2014-04-11 2023-08-29 Oshkosh Defense, Llc Suspension element
WO2019097210A1 (fr) * 2017-11-16 2019-05-23 Bae Systems Plc Jambe de suspension
US11633998B2 (en) 2017-11-16 2023-04-25 Bae Systems Plc Suspension strut
CN109812531A (zh) * 2018-12-29 2019-05-28 清科智能悬架***（苏州）有限公司 一种液压主动式减震器
CN111237376A (zh) * 2020-02-20 2020-06-05 唐山保靓汽车配件有限公司 用于减震器的散热装置
CN111237376B (zh) * 2020-02-20 2021-07-27 唐山保靓汽车配件有限公司 用于减震器的散热装置

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