EP1778508A1 - Dispositif de suspenson - Google Patents
Dispositif de suspensonInfo
- Publication number
- EP1778508A1 EP1778508A1 EP05771915A EP05771915A EP1778508A1 EP 1778508 A1 EP1778508 A1 EP 1778508A1 EP 05771915 A EP05771915 A EP 05771915A EP 05771915 A EP05771915 A EP 05771915A EP 1778508 A1 EP1778508 A1 EP 1778508A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- suspension
- suspension device
- load
- 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
-
- 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
- B60G17/015—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 the regulating means comprising electric or electronic elements
- B60G17/0152—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 the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
-
- 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
- B60G17/056—Regulating distributors or valves for hydropneumatic 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
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
-
- 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
- B60G2202/414—Fluid actuator using electrohydraulic valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/08—Agricultural vehicles
- B60G2300/082—Tractors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
- B60G2400/252—Stroke; Height; Displacement vertical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/51—Pressure in suspension unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/51—Pressure in suspension unit
- B60G2400/518—Pressure in suspension unit in damper
- B60G2400/5182—Fluid damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/60—Load
-
- 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
- B60G2500/11—Damping valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
Definitions
- the invention relates to a suspension device, in particular for Fahrzeu ⁇ ge with changing load conditions, with
- At least one suspension cylinder each having pressure chambers, such as a ring and a piston chamber, a load-sensing system for generating pressure,
- DE 4242 448 C1 discloses a hydro-pneumatic suspension device which relates to vehicles with high load ratios, in particular for tractors with attachment means for attachments and load-sensing pumps for generating pressure, the annular chambers of the suspension cylinders also being pressurized and verbun ⁇ with a hydraulic accumulator are the.
- the known solution aims at improving earlier arrangements of this type, which have control mechanisms which are provided by constant-pressure systems. need to be fed, and in which the use of a load-sensing pump brings no success, as this would always promote high pressure. The latter also means that the described systems permanently consume energy.
- the known solution proposes to provide energy savings and the possibility of using a load-sensing pump in that the annular space of the respective Federungs ⁇ cylinder is supplied via a 3-way pressure control valve with pressure, and provided a level control device with a valve device is the short-term up or down only in static load changes and in the otherwise assumed rest position makes all control lines and supply lines depressurized, the piston and annular chambers are hermetically sealed off by way of unlockable return check valves.
- it is necessary to control the pressure control valve hydraulically and, moreover, the pressure in the annular spaces of the suspension cylinder is adjusted depending on their pressure conditions on the piston side, including conventional switching valves are used for the level control.
- Pressure control valve to use additional switching valves, so that in principle the pressure setting on the annulus side of the suspension cylinder and the level control are functionally separated. Furthermore, the possibilities are possible to adjust the ring-side pressure of the suspension cylinders to different pressure levels in order to provide different suspension characteristics.
- the load on the piston side and the wheel sets are arranged with wheel axles on the rod side of the respective suspension cylinder.
- the pressure on the piston side is determined by the load and the pressure in the annulus.
- the position of the proportional pressure control valve which may also be a proportional pressure reducing valve, is not bound to the rod side of the damping cylinder, but rather the position is determined by the pressure chamber, which is not acted upon directly by the load.
- the solution according to the invention could therefore also be used in a conspicuous suspension design, in which the load is seated on the rod side, and the wheels on the piston side are comparable.
- the pressure setting for the level control Aus ⁇ finally takes place on the respective ring side of the suspension cylinder.
- the suspension device according to the invention applies in particular to the use in vehicles, the main applications are in heavy duty vehicles such as farm tractors, trucks or derglei ⁇ Chen.
- the suspension device according to the invention according to the figure has two suspension cylinders 10, 12, each pressure chambers as a Annulus 14 and a piston chamber 16 have.
- the load on the piston side should thus rest on the side of the piston chamber 16 of the respective suspension cylinder 10, 12, and the wheels and the axes are arranged on the rod side of the suspension cylinder 10, 12, thus facing the annular space side 14
- the device is provided with a load-sensing system, designated as a whole by 18, which serves to generate pressure and which is reproduced only symbolically in the figure with a control point 20.
- the load-sensing system is connected to a control device not shown, for example in the form of a computer with appropriate data logic.
- two main branches 22, 24 forming supply lines are present between said spaces 14, 16 and a pump P and a tank port T.
- a valve 26, 28 is connected of which at least one valve 26 is a pressure control valve, in particular in the form of a Proportio- nal horrregelventiles or pressure regulator valve.
- a pressure setting for the respective predeterminable pressure chamber of the suspension cylinders 10, 12 is possible via the proportional pressure control valve 26.
- the pressure regulating valve 26 can be actuated electrically by means of the already mentioned control device and, to that extent, has an attachment point 30.
- the pressure setting for the respective predeterminable pressure chamber 14, 16 is preferably for those who is not directly exposed to a load; In the present embodiment, therefore, the pressure setting for the level control takes place exclusively on the respective ring side (annular space 14) of the suspension cylinder 10, 12.
- a position measuring system 32 of conventional design which also has a connection point 34 in order to provide such measurement data to the control device, not shown.
- the data of the position measuring system 32 are processed by the control device for the load-sensing system 18, which controls a non-illustrated control pump for pressure generation for the Federungsvor ⁇ direction, which is connected to the pump port P.
- a switching valve of conventional design is switched, in particular in the form of a 3/2-way valve 28.
- a shuttle valve 38 in particular Kugel Touch ⁇ valve switched.
- the shuttle valve 38 is in turn connected to the output side of the load sensing system 18 and acts on the other two pilot-operated check valves 40, 42, which are provided in the manner of controllable 2/2-way valves in their open position with a throttle.
- a pressure sensor DA is arranged in the further main branch 24 leading to the piston chamber 16 of the respective spring cylinder 10, 12. Furthermore, the piston chambers 16 and the annular spaces 14 of the respective suspension cylinders 10, 12 are connected to one another in a fluid-conducting manner, wherein in each case a hydraulic accumulator 46, 48 is connected in the pertinent connection. Between the two main branches 22, 24 and secured by two check valves 50, 52 is a D jerk limiting ungsventi I 54 connected, which is connected to the tank port T.
- the respective suspension cylinder 10, 12 should always be in Mit ⁇ ten Scheme with its piston rod unit to have in such a way in both directions the full input and Ausfederweg.
- the intelligence of the controller recognizes departing deviations, on the data toge ⁇ from the measuring system 32. If, for example, the axle load for the suspension cylinders 10, 12 is increased, the cylinders move in accordingly and in order to counteract this, a fluid, in particular hydraulic medium (oil), has to be brought into the respective piston chamber 16 of the suspension cylinders 10, 12.
- the valve 26 is driven to the pressure that is needed and at the same time the 3/2-way switching valve 28 is switched. In this way, an actuation of the shuttle valve 38 is possible and then supplies the pressure to the load-sensing system 28.
- the load pressure in the connection between the valve 28 and valve 38 corresponds to the piston-side pressure for the suspension cylinders 10, 12th
- the shuttle valve 38 adjusts itself with regard to the pressure difference that the highest load pressure via the load-sensing system 28 delivered to the control pump, not shown which then goes to the control pressure. Since the required pressure is now present at the pump connection P, the volume flow connected thereto is sent to the piston side of the suspension cylinders 10, 12 via the 3/2-way switching valve 28. This happens until the control electronics or control device detects that the piston rod unit of the suspension cylinders 10, 12 are again in the middle position, with the result that both valves 26, 28 are de-energized and the suspension device is then defined in FIG a central position for the suspension cylinders 10, 12 set.
- the load is reduced to the suspension cylinder 10, 12, with the result that this extension and in the respective Kolben ⁇ chamber 16 and the hydraulic accumulator 48 to drain oil, which in the state of Technology usually happens via other switching valves.
- the purging operation likewise takes place via the pressure regulating valve 26. If the control device (electronics) makes the decision based on the sensor position that oil or hydraulic medium is to be discharged from the suspension cylinders 10, 12, this in turn becomes a valve 26 driven and brought to the working pressure, which should prevail on the Ring ⁇ page at the annular spaces 14.
- the described suspension device according to the invention can also be realized with only one suspension cylinder, here the suspension cylinder (10).
- the suspension cylinder here the suspension cylinder (12)
- the corresponding fluid lines could be closed by closure parts such as blind plugs or the like.
- Interconnection could use the Fede ⁇ tion device shown in the figure also for more than two suspension cylinder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
La présente invention concerne un dispositif de suspension destiné notamment à des véhicules ayant des rapports de charge variables et comprenant au moins un cylindre de suspension (10, 12) qui présente respectivement des chambres de pression comme une chambre annulaire (14) et une chambre de piston (16); un système détecteur de charge (18) destiné à la génération de pression; deux conduites d'alimentation formant des branches principales (22, 24) entre ces chambres (14,16) et une pompe (P) ainsi qu'un raccordement de réservoir (T). Une soupape (26, 28) est montée dans chaque branche principale (22, 24), au moins une soupape (26) étant une soupape de régulation de pression qui permet de régler la pression de la chambre de pression respectivement donnée du cylindre de suspension (10, 12) respectif. Ce dispositif de suspension comprend également un dispositif régulateur de niveau, la régulation de niveau s'effectuant en plus de la régulation de pression (26) à l'aide de cette soupape de régulation de pression (26) et la soupape de régulation de pression (26) étant commandée par voie électrique à l'aide d'un dispositif de commande.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004040636A DE102004040636A1 (de) | 2004-08-21 | 2004-08-21 | Federungsvorrichtung |
PCT/EP2005/008706 WO2006021327A1 (fr) | 2004-08-21 | 2005-08-11 | Dispositif de suspenson |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1778508A1 true EP1778508A1 (fr) | 2007-05-02 |
Family
ID=35063354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05771915A Ceased EP1778508A1 (fr) | 2004-08-21 | 2005-08-11 | Dispositif de suspenson |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090051130A1 (fr) |
EP (1) | EP1778508A1 (fr) |
DE (1) | DE102004040636A1 (fr) |
WO (1) | WO2006021327A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012000045B3 (de) * | 2012-01-03 | 2013-03-28 | Hydac System Gmbh | Vorrichtung zur Ansteuerung eines fluidbetätigten Aktuators bei einer Arbeitsgerätschaft |
DE102012106185B3 (de) | 2012-07-10 | 2013-11-21 | Fsp Fluid Systems Partners Holding Ag | Steueranordnung für ein hydropneumatisches Federungssystem sowie hydropneumatisches Federungssystem mit einer solchen Steueranordnung |
DE102012022030A1 (de) * | 2012-11-12 | 2014-05-15 | Deere & Company | Federungseinrichtung für eine beweglich gelagerte Fahrzeugachse |
DE102013102069A1 (de) | 2013-03-01 | 2014-09-04 | Fsp Fluid Systems Partners Holding Ag | Proportional-Wegeventil sowie hydraulische Schaltung und hydropneumatisches Federungssystem mit einem derartigen Ventil |
DE102015101032A1 (de) * | 2015-01-26 | 2016-07-28 | Amazonen-Werke H. Dreyer Gmbh & Co. Kg | Landwirtschaftliche Maschine und Regelungsverfahren |
WO2016166161A1 (fr) * | 2015-04-17 | 2016-10-20 | Cnh Industrial Italia S.P.A. | Système de suspension pour un véhicule |
ITUB20160745A1 (it) * | 2016-02-15 | 2017-08-15 | Cnh Ind Italia Spa | Un processo di controllo per le sospensioni di un veicolo |
CN106314061B (zh) * | 2016-10-18 | 2018-10-16 | 隆学武 | 主动体积控制的油气悬挂***及车辆 |
DE102017001653A1 (de) | 2017-02-21 | 2018-08-23 | Hydac Systems & Services Gmbh | Federungsvorrichtung |
DE102018004769A1 (de) | 2018-06-13 | 2019-12-19 | Hydac Mobilhydraulik Gmbh | Steuervorrichtung |
WO2019241650A1 (fr) | 2018-06-14 | 2019-12-19 | ClearMotion, Inc. | Accumulateurs pour système de suspension active distribuée |
DE102020001713A1 (de) | 2020-03-13 | 2021-09-16 | Hydac Mobilhydraulik Gmbh | Ansteuervorrichtung |
DE102020002124A1 (de) | 2020-04-02 | 2021-10-07 | Hydac Mobilhydraulik Gmbh | Hydropneumatisches Federungssystem für Fahrzeuge |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2628948B2 (ja) * | 1991-08-06 | 1997-07-09 | 本田技研工業株式会社 | 能動型懸架装置の油圧制御装置 |
DE4242448C1 (de) * | 1992-12-16 | 1994-03-31 | Integral Hydraulik Co | Hydro-pneumatische Federungseinrichtung |
DE19719076C2 (de) * | 1997-05-06 | 2000-05-04 | Integral Accumulator Kg | Hydropneumatische Federungseinrichtung für Fahrzeuge mit großen Lastverhältnissen |
DE10107644B4 (de) * | 2001-02-15 | 2005-02-10 | Carl Freudenberg Kg | Hydropneumatische Federung für Fahrzeuge mit stark wechselnden Achslasten |
US6578855B2 (en) * | 2001-07-11 | 2003-06-17 | Deere & Company | Vehicle suspension control system |
DE10232769B4 (de) * | 2002-07-18 | 2005-08-25 | Carl Freudenberg Kg | Hydropneumatische Achsfederung für Fahrzeuge für Fahrzeuge mit stark wechselden Achslasten |
-
2004
- 2004-08-21 DE DE102004040636A patent/DE102004040636A1/de not_active Withdrawn
-
2005
- 2005-08-11 WO PCT/EP2005/008706 patent/WO2006021327A1/fr active Application Filing
- 2005-08-11 US US11/660,500 patent/US20090051130A1/en not_active Abandoned
- 2005-08-11 EP EP05771915A patent/EP1778508A1/fr not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO2006021327A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20090051130A1 (en) | 2009-02-26 |
DE102004040636A1 (de) | 2006-02-23 |
WO2006021327A1 (fr) | 2006-03-02 |
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Legal Events
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