WO2012101357A1 - Dispositif de direction assistee hydraulique pour un vehicule, tel qu'un vehicule automobile - Google Patents
Dispositif de direction assistee hydraulique pour un vehicule, tel qu'un vehicule automobile Download PDFInfo
- Publication number
- WO2012101357A1 WO2012101357A1 PCT/FR2012/050076 FR2012050076W WO2012101357A1 WO 2012101357 A1 WO2012101357 A1 WO 2012101357A1 FR 2012050076 W FR2012050076 W FR 2012050076W WO 2012101357 A1 WO2012101357 A1 WO 2012101357A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power steering
- vehicle
- heat exchanger
- steering device
- hydraulic fluid
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
Definitions
- HYDRAULIC ASSISTED STEERING DEVICE FOR A VEHICLE SUCH AS A MOTOR VEHICLE.
- the present invention relates to a hydraulic power steering device for a vehicle, such as a motor vehicle.
- a hydraulic power steering device generally comprises a power steering box integral with the body of the servovalve vehicle controlled by the steering wheel so as to control the supply of hydraulic fluid to one of the chambers of the steering box. assisted steering and discharge the hydraulic fluid present in the other chamber of the power steering box to orient the front wheels of the vehicle in the direction of rotation of the steering wheel.
- This power steering device further comprises a hydraulic fluid supply pump connected to the input of the servovalve via a high pressure hydraulic fluid supply line.
- the output of the servo valve is connected by a low pressure hydraulic fluid return line to a hydraulic fluid recovery tank communicating with the pump to recirculate the hydraulic fluid in the power steering circuit.
- the power steering device is also provided with a heat exchanger or radiator for cooling the hydraulic fluid leaving the servovalve of the power steering box.
- the radiator of the hydraulic power steering fluid is constituted by two rectilinear metal pipes hairpin branches close to each other and fixed under the body of the vehicle below the front of it or under the bodywork in the central tunnel area.
- This type of cooling radiator has the drawbacks of considerably increasing the length of pipes since those formed by the straight pipes of the cooling radiator are separated and come in addition to the high pressure hydraulic fluid supply lines and the return of the hydraulic fluid. low pressure and, therefore, complicates the assembly to the vehicle of all these pipes.
- US Pat. No. 5,002,117 discloses a device for cooling the hydraulic fluid of a power steering of a vehicle making it possible to overcome at least in part the disadvantages of the cooling radiator described above.
- This cooling device comprises a heat exchanger having a serpentine configuration disposed in the return line of the low pressure hydraulic fluid connecting the output of the power steering box to the hydraulic fluid recovery tank.
- the serpentine heat exchanger is housed in a longitudinal tubular portion of the vehicle body so that the air entering this part provides cooling of the hydraulic fluid flowing through the coil.
- this known solution has the disadvantage of requiring the presence of an available tubular part of the vehicle body, which is not always the case for many vehicles, and is relatively complex to install and fix in this tubular portion which is relatively remote from the power steering box, therefore requiring a relatively long length of pipes connecting the coil heat exchanger on the one hand to the output of the power steering box and secondly to the hydraulic fluid recovery tank.
- the present invention aims to overcome the above disadvantages by providing a simple and effective solution for cooling the hydraulic fluid circulating in the hydraulic power steering device of a vehicle while being economical in terms of length of pipes to use in the hydraulic system of power steering.
- the hydraulic power steering device for a vehicle such as a motor vehicle, comprising a power steering box whose input is connected by a high pressure hydraulic fluid supply line to a hydraulic pump and an outlet is connected by a low pressure hydraulic fluid return line to a hydraulic fluid recovery tank and a coil-shaped heat exchanger disposed in the return line to allow cooling of the hydraulic fluid exiting the housing power steering system, characterized in that the heat exchanger is connected to the output of the power steering box so as to be disposed close to this housing.
- the heat exchanger is disposed above the front cradle of the vehicle.
- the heat exchanger is disposed between the engine and the deck of this vehicle.
- the serpentine shape of the heat exchanger is constituted by a spirally wound tube each turn extending substantially in a plane perpendicular to the longitudinal direction of the steering box assisted or in a plane parallel to the longitudinal direction of this housing.
- the heat exchanger is fixed to the cradle by at least one bracket.
- the heat exchanger may be provided with cooling fins.
- the invention also relates to a vehicle, such as a motor vehicle, which is characterized in that it is equipped with a hydraulic power steering device as defined above.
- FIG. 1 is a perspective view of a front portion of a motor vehicle with hydraulic power steering provided with a heat exchanger according to the invention
- FIG. 2 is an enlarged view of the circled portion II of Figure 1;
- FIG. 3 is a partial perspective view enlarged along the arrow III of Figure 1;
- Figure 4 is an enlarged view of the circled portion IV of Figure 3.
- FIG. 5 shows an alternative embodiment of the heat exchanger of the invention.
- reference numeral 1 denotes the front cradle of the vehicle to which is attached the casing (or mechanism) of power steering.
- the assembly 2 refers to the gearbox and the engine of the vehicle, only the gearbox housing 3 of the vehicle being shown in FIG.
- the vehicle is provided with a hydraulic power steering device which comprises a power steering box 4 integral with a body part of the vehicle which can be constituted by the front cradle 1 and which is provided with a servovalve 5 connected by a axis 6 to a steering wheel, not shown.
- the power steering box 4 which extends transversely to the vehicle, comprises, not visible in the figures, two internal chambers separated from each other by a movable piston connected by two connecting mechanisms 7, 8 to the left and to the right of the vehicle, respectively to the two front left and right wheels of the vehicle, also not shown.
- a hydraulic fluid supply pump 9 is driven by the vehicle engine to supply high pressure hydraulic fluid in a supply line 10 connecting the pump 9 to the inlet E of the servovalve 5.
- the output S of the servovalve 5 is connected by a low pressure hydraulic fluid return line 11 to a reservoir 12 for recovering the hydraulic fluid integrated in the pump 9, the latter using the hydraulic fluid of the reservoir 12 to reroute it to the E input of the servovalve 5 through the pipe 11.
- the pipes 10, 11 may be constituted by a series of rigid tubes and flexible tubes.
- the servovalve 5 controls the supply of hydraulic fluid from the pump 9 through the pipe 10 of one of the chambers of the power steering box 4 and simultaneously controls the evacuation of the hydraulic fluid from the other chamber of this housing to return it to the tank 12 through the pipe 11 so that the internal piston of the housing 4 moves to guide the front wheels of the vehicle in the direction of rotation of the steering wheel.
- the pipe 11 for returning hydraulic fluid to the tank 12 comprises a heat exchanger or radiator 13 which is constituted by a portion of the rigid tube of the pipe 11 curved in a coil and which allows the cooling of the hydraulic fluid leaving the servovalve 5 of the housing power steering 4.
- the serpentine portion constituting the heat exchanger 13 is connected directly to the outlet port S of the servovalve 5 of the power steering box 4 so as to be arranged close to the power steering box 4 and above the front cradle 1 of the vehicle.
- An alternative embodiment is the implementation of a hose to the output S of the servovalve and one heat exchanger for reducing 1 'water hammer effect or even improvement in assembly.
- the serpentine portion of the heat exchanger 13 is connected to the outlet port S of the servovalve 5 via a straight tubular portion of very short length 13a extending substantially parallel to the direction. longitudinal direction of the power steering box 4 so that the heat exchanger 13 is located near the servovalve 5, above the housing 4.
- the shape of one heat exchanger may be varied according to the space available and the exchange surface of heat desired.
- the serpentine portion of the heat exchanger 13 is constituted by a spirally wound tube, for example having four turns, each of which extends substantially in a plane perpendicular to the longitudinal direction of the 4.
- the end turn 13b of the heat exchanger 13 located opposite the end turn 13c adjacent the servovalve 5 and is connected to the return line 11 is connected to the rectilinear portion 13a connecting the heat exchanger 13 directly to the outlet orifice S of the servovalve 5.
- FIG. 1 shows that the coil heat exchanger 13 is situated not only above the cradle 1, but it can also be arranged in a region between the engine and the apron separating the engine compartment from the passenger compartment of the vehicle, region often offering space availability.
- the serpentine portion of the heat exchanger 13 may be made by a tube bent a number of times in the form of successive hairpins, each branch of which would be located substantially in a plane perpendicular to the longitudinal direction of the housing power steering 4.
- the coil heat exchanger 13 may be freely fixed between the outlet S of the servovalve 5 and the return pipe 11, that is to say without being secured to the front cradle to ensure a certain flexibility of the heat exchanger. heat 13.
- the heat exchanger 13 can be fixed to the front cradle 1 by at least one fastening lug 14 solidarizing the rectilinear portion 13a of the coil heat exchanger 13 to the front cradle 1.
- the bracket 14 comprises a substantially L-shaped portion whose small branch is attached to a corresponding portion of the front stretcher 1 by means of a fastening bolt 15 or the like and a part secured to the end of the large branch of the L of the tab 14 curved in a cylindrical portion 16 ajar for elastically introducing force and retain the rectilinear portion 13a in the cylindrical portion 16 of the tab 14.
- the serpentine heat exchanger 13 can also be fixed to the front cradle 1 at a rectilinear portion of short length 13d connecting the last turn 13c of this exchanger to the return line 11.
- the fixing means 15 of the rectilinear portion 13c is common to that fixing to the cradle before 1 a rectilinear portion 10a connecting the supply line 10 to the inlet E of the servovalve 5.
- This fixing means 15 may consist of a block enclosing the two substantially parallel rectilinear parts 13c and 10a and which is integral with a lug 16 fixed to the front cradle 1 by means of a bolt 17 or the like.
- the two lines 10, 11 can be fixed in their path between the pump assembly 9 and reservoir 12 and the servovalve 5 of the power steering box 4 with fastening tabs 18, for example, on the assembly 2 to gearbox-engine of the vehicle or on the bodywork.
- the serpentine shape of the heat exchanger 13 situated above the front cradle 1 advantageously in a region available between the engine M and the vehicle deck is also constituted by a rigid tube wound in a spiral of which each turn extends substantially in a plane parallel to the longitudinal direction of the power steering box 4.
- the heat exchanger 13 has three turns located above the power steering box 4 with the lower extreme turn 13e connected to a rigid tubular portion 13f substantially transverse to the longitudinal direction of the power steering box 4 and which is extended by a bent portion substantially at right angles 13g of very short length connected to the outlet port S of the servovalve 5 so that the heat exchanger 13 is located near the servovalve 5.
- the lower turn 13e has a rectilinear portion 13 j substantially parallel to the longitudinal direction of the power steering box 4, connected to the tubular portion 13f and which is fixed in conjunction with a parallel rectilinear tubular portion 10b of the return line 10 on the front cradle 1 through a block 20 fixed to the front cradle 1 by a tab, not shown.
- turns of the heat exchanger 13 described in Figures 1 to 5 may be provided with fins to increase the heat exchange surface to improve the cooling of the hydraulic fluid passing through the coil of this exchanger .
- the implementation of the heat exchanger or radiator described above of the invention reduces the length of piping between the servovalve of the power steering box and the hydraulic fluid supply pump and allows a simpler mounting of this exchanger in the vehicle, resulting in a substantial reduction in costs.
- the installation of this radiator between the engine and the deck of the vehicle in an often available region does not cause repair costs in the event of a frontal impact relative to known solutions, especially that in which the radiator is located in the region. frontal of the vehicle.
- the radiator is located above the front cradle of the vehicle makes it less exposed to gravel compared to the underbody radiator or under the engine of the vehicle.
- the invention applies in particular to vehicles with high hydraulic steering support, lower availability of space in the engine compartment, and causes a reduction in costs.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013016710A BR112013016710A2 (pt) | 2011-01-28 | 2012-01-12 | dispositivo de direção assistida hidráulica para um veículo como um veículo automotivo |
EP12705323.9A EP2668086A1 (fr) | 2011-01-28 | 2012-01-12 | Dispositif de direction assistee hydraulique pour un vehicule, tel qu'un vehicule automobile |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1150669 | 2011-01-28 | ||
FR1150669A FR2970930B1 (fr) | 2011-01-28 | 2011-01-28 | Dispositif de direction assistee hydraulique pour un vehicule, tel qu'un vehicule automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012101357A1 true WO2012101357A1 (fr) | 2012-08-02 |
Family
ID=45755367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/050076 WO2012101357A1 (fr) | 2011-01-28 | 2012-01-12 | Dispositif de direction assistee hydraulique pour un vehicule, tel qu'un vehicule automobile |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2668086A1 (fr) |
AR (1) | AR084945A1 (fr) |
BR (1) | BR112013016710A2 (fr) |
FR (1) | FR2970930B1 (fr) |
WO (1) | WO2012101357A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016024052A1 (fr) * | 2014-08-13 | 2016-02-18 | Peugeot Citroen Automobiles Sa | Structure permettant de fixer des composants sur le berceau moteur sans prolonges d'un vehicule |
FR3080829A1 (fr) * | 2018-05-02 | 2019-11-08 | Psa Automobiles Sa | Procede de depose d’un berceau et d’une direction assistee electrique et vehicule automobile associe |
CN111776065A (zh) * | 2020-06-28 | 2020-10-16 | 东风商用车有限公司 | 一种带旁路的集成式转向散热器 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109533017A (zh) * | 2018-10-29 | 2019-03-29 | 南京金龙新能源汽车研究院有限公司 | 一种电子液压助力转向系统 |
DE102019211391A1 (de) * | 2019-07-31 | 2021-02-04 | Audi Ag | Anordnung umfassend einen Achshilfsrahmen und eine Wärmetauschervorrichtung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1015919A (en) * | 1964-11-24 | 1966-01-05 | Ford Motor Co | Motor vehicle power steering |
US5002117A (en) | 1990-04-02 | 1991-03-26 | General Motors Corporation | Motor vehicle power steering cooler arrangement |
DE4040378A1 (de) * | 1990-12-17 | 1992-06-25 | Bayerische Motoren Werke Ag | Kuehleinrichtung fuer einen fluessigkeitskreislauf eines kraftfahrzeugs, insbesondere einer servolenkeinrichtung |
WO2006078199A1 (fr) * | 2005-01-24 | 2006-07-27 | Volvo Lastvagnar Ab | Refroidissement du systeme de direction assistee |
DE102005043802A1 (de) * | 2005-09-14 | 2007-03-29 | Man Nutzfahrzeuge Ag | Vorrichtung zur Einstellung der Temperatur von Lenkungsöl in einem Kraftfahrzeug |
-
2011
- 2011-01-28 FR FR1150669A patent/FR2970930B1/fr not_active Expired - Fee Related
-
2012
- 2012-01-12 WO PCT/FR2012/050076 patent/WO2012101357A1/fr active Application Filing
- 2012-01-12 BR BR112013016710A patent/BR112013016710A2/pt not_active IP Right Cessation
- 2012-01-12 EP EP12705323.9A patent/EP2668086A1/fr not_active Withdrawn
- 2012-01-27 AR ARP120100284 patent/AR084945A1/es unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1015919A (en) * | 1964-11-24 | 1966-01-05 | Ford Motor Co | Motor vehicle power steering |
US5002117A (en) | 1990-04-02 | 1991-03-26 | General Motors Corporation | Motor vehicle power steering cooler arrangement |
DE4040378A1 (de) * | 1990-12-17 | 1992-06-25 | Bayerische Motoren Werke Ag | Kuehleinrichtung fuer einen fluessigkeitskreislauf eines kraftfahrzeugs, insbesondere einer servolenkeinrichtung |
WO2006078199A1 (fr) * | 2005-01-24 | 2006-07-27 | Volvo Lastvagnar Ab | Refroidissement du systeme de direction assistee |
DE102005043802A1 (de) * | 2005-09-14 | 2007-03-29 | Man Nutzfahrzeuge Ag | Vorrichtung zur Einstellung der Temperatur von Lenkungsöl in einem Kraftfahrzeug |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016024052A1 (fr) * | 2014-08-13 | 2016-02-18 | Peugeot Citroen Automobiles Sa | Structure permettant de fixer des composants sur le berceau moteur sans prolonges d'un vehicule |
FR3024864A1 (fr) * | 2014-08-13 | 2016-02-19 | Peugeot Citroen Automobiles Sa | Structure permettant de fixer des composants sur le berceau moteur sans prolonges d'un vehicule |
FR3080829A1 (fr) * | 2018-05-02 | 2019-11-08 | Psa Automobiles Sa | Procede de depose d’un berceau et d’une direction assistee electrique et vehicule automobile associe |
CN111776065A (zh) * | 2020-06-28 | 2020-10-16 | 东风商用车有限公司 | 一种带旁路的集成式转向散热器 |
Also Published As
Publication number | Publication date |
---|---|
FR2970930B1 (fr) | 2013-08-09 |
AR084945A1 (es) | 2013-07-10 |
FR2970930A1 (fr) | 2012-08-03 |
BR112013016710A2 (pt) | 2017-03-21 |
EP2668086A1 (fr) | 2013-12-04 |
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