WO2014071944A2 - Method for operating a hydrostatic actuator arrangement - Google Patents
Method for operating a hydrostatic actuator arrangement Download PDFInfo
- Publication number
- WO2014071944A2 WO2014071944A2 PCT/DE2013/200274 DE2013200274W WO2014071944A2 WO 2014071944 A2 WO2014071944 A2 WO 2014071944A2 DE 2013200274 W DE2013200274 W DE 2013200274W WO 2014071944 A2 WO2014071944 A2 WO 2014071944A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- actuator arrangement
- hydraulic line
- hydrostatic actuator
- hydraulic
- heating device
- Prior art date
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims description 42
- 239000004020 conductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
- F16D25/14—Fluid pressure control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/52—General
- F16D2500/525—Improve response of control system
Definitions
- the present invention relates to a method for operating a hydrostatic
- Actuator arrangement in particular for actuating the clutch of a motor vehicle.
- the invention further relates to a hydrostatic actuator arrangement for carrying out this method.
- such hydrostatic actuator assemblies include a master cylinder and a slave cylinder, which are interconnected by a hydraulic line.
- Such hydrostatic Aktoranordonne be used in particular for the actuation of clutches.
- the thermal expansion in the hydraulic fluid has the consequence that, when the master cylinder is held, the piston in the slave cylinder is moved further and the clutch is closed more strongly.
- the clutch torque therefore increases in an undesirable manner.
- a correction of known manner be performed by the control software shifts the master cylinder. If the slave cylinder no position sensor is present, the currently transmitted torque of the clutch can be determined only very inaccurate from the position of the master cylinder, for example by a feedback via the engine torque or the pressure at high temperature fluctuations.
- the object of the present invention is to provide a method for operating a hydrostatic actuator arrangement, by which the disadvantages explained above can be avoided. Furthermore, according to the task, a relatively simple and small-sized hydrostatic actuator arrangement is specified for carrying out this method. This object is achieved by a method for actuating a hydrostatic actuator arrangement with the features of claim 1.
- the actuator assembly comprises a slave cylinder, a master cylinder, a hydraulic line connecting the master cylinder to the slave cylinder and a fluid reservoir, which can be connected via a sniffer bore to the hydraulic line in which a hydraulic fluid is contained.
- the hydraulic fluid is heated to reduce temperature differences occurring during operation.
- Hydraulic fluid is heated to the usual operating temperature before the first movement of the actuator assembly, so that after closing the actuator assembly only small temperature fluctuations are recorded.
- the temperature of the hydraulic fluid is determined in a first step.
- the heating time required for heating the hydraulic fluid by a heater to a predetermined operating temperature is determined.
- the master cylinder is displaced until there is a connection between the hydraulic line and the fluid reservoir via the sniffer bore and the heater is activated for the duration while simultaneously adjusting the volume of hydraulic fluid through the sniffer bore to the fluid reservoir in a fourth step.
- the hydraulic actuator arrangement is then ready for operation.
- the hydrostatic actuator arrangement according to the invention in particular for carrying out the present method according to claim 1 or 2, comprises a master cylinder, a slave cylinder, a hydraulic line connecting the master cylinder to a slave cylinder and a fluid reservoir which can be connected to the hydraulic line via a sniffer bore. Furthermore, the actuator arrangement according to the invention has a heating device for heating the hydraulic fluid present in the hydraulic line.
- the essential advantage of the present invention resides in the fact that the hardware of the present hydrostatic actuator arrangement can be made small so that it advantageously requires only a very small installation space.
- a relatively accurate and safe operation of the hydrostatic actuator arrangement according to the invention is possible even at a low natural temperature.
- the heater is particularly advantageously arranged outside the hydraulic line. It preferably comprises a heating wire wholly or partially wound around the hydraulic line.
- the heating device can also be arranged within the hydraulic line and comprise a heating wire arranged in the hydraulic line. It is also conceivable to arrange the heating device inside and outside the hydraulic line.
- the heating device may comprise heating elements which are connected via a heat-conducting material to the hydraulic line. These heating elements may expediently be part of the power electronics of a motor vehicle. As a result, the hydraulic fluid can be heated energy-saving.
- 1 to 3 are schematic diagrams for explaining the principle of the present invention based on the situation of a parked, cooled vehicle,
- FIG. 4 shows a flow chart for explaining the method according to the invention
- Figures 5 and 6 are schematic diagrams for explaining the prior art.
- the hydrostatic actuator arrangement 1 essentially comprises a master cylinder 2, a slave cylinder 3 and a hydraulic line 4 connecting the master cylinder 2 to the slave cylinder 3.
- the master cylinder 3 can be connected to a fluid reservoir 6 via a sniffer bore 9.
- the slave cylinder 3 is used to actuate a clutch 5, which is in particular a friction clutch.
- a heating device 7 which preferably has the shape of a
- Hydraulic line 4 surrounding heating wire 8 has provided for heating the hydraulic line 4 and the hydraulic fluid contained therein.
- the reliable operation of the hydrostatic actuator assembly 1 can be ensured by heating the hydraulic fluid and lowering the viscosity of the same even at very low temperatures.
- the heater 7 forming heating wire 8 can also be located within or outside and within the hydraulic line 4.
- the heating device 7 comprises heating elements, which for example comprise the form of electronic power components, which can form a heat conduction to the hydraulic line 4 via a suitable material.
- the state of the hydrostatic actuator assembly 1 is shown at a very low temperature.
- the temperature of the hydraulic fluid can be increased up to the usual operating temperature. This ensures that even after closing the hydrostatic actuator assembly 1 only small temperature differences occur.
- the temperature TO is determined before a journey starts.
- the heating time t is calculated within which a target temperature T can be reached by operating the heating device 7.
- the master cylinder 3 is then actuated until the fluid reservoir 6 is connected via the sniffer bore 9 with the hydraulic line 4 according to FIG.
- step S4 the heating device 7 is actuated for the heating period t
- step S5 the hydrostatic actuator assembly 1 is now ready for operation by displacing the master cylinder 2 in the manner shown in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013005315.2T DE112013005315B4 (en) | 2012-11-07 | 2013-11-06 | Method for operating a hydrostatic actuator arrangement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012220219 | 2012-11-07 | ||
DE102012220219.6 | 2012-11-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2014071944A2 true WO2014071944A2 (en) | 2014-05-15 |
WO2014071944A3 WO2014071944A3 (en) | 2014-08-28 |
Family
ID=50068756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2013/200274 WO2014071944A2 (en) | 2012-11-07 | 2013-11-06 | Method for operating a hydrostatic actuator arrangement |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE112013005315B4 (en) |
WO (1) | WO2014071944A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014216309B4 (en) * | 2014-08-18 | 2020-09-24 | Schaeffler Technologies AG & Co. KG | Method for local heating of a viscous elastic component of a hydrostatic actuator of a vehicle and a hydrostatic clutch actuator |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO970288L (en) * | 1996-01-29 | 1997-07-30 | Luk Getriebe Systeme Gmbh | The actuation device |
DE10102874A1 (en) * | 2000-11-17 | 2002-06-06 | Zf Sachs Ag | coupling system |
WO2004042246A2 (en) * | 2002-11-07 | 2004-05-21 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Methods and devices, especially for actuating an automatic gearbox of a motor vehicle |
DE102009037344A1 (en) * | 2009-08-14 | 2011-02-17 | Volkswagen Ag | Method for controlling the coolant supply and the lubricant supply of a clutch of a motor vehicle with an automatic transmission |
DE112011100466T5 (en) * | 2010-02-05 | 2012-11-22 | Ricardo, Inc. | Hydraulic control system for dual-clutch transmissions |
DE112011102157A5 (en) * | 2010-06-28 | 2013-05-02 | Schaeffler Technologies AG & Co. KG | Hydrostatic actuator and method of controlling a hydrostatic actuator |
DE102010060704A1 (en) * | 2010-11-22 | 2012-05-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for operating drive system of motor vehicle, involves filling hydraulically operated clutch unit operatively connecting internal combustion engine and gear of drive system with pressure fluid |
FR2992905B1 (en) * | 2012-07-03 | 2016-03-11 | Renault Sas | VEHICLE HAVING REVERSE ENGINE AND POSSESSING AN IMPROVED CLUTCH SYSTEM |
-
2013
- 2013-11-06 WO PCT/DE2013/200274 patent/WO2014071944A2/en active Application Filing
- 2013-11-06 DE DE112013005315.2T patent/DE112013005315B4/en not_active Expired - Fee Related
- 2013-11-06 DE DE102013222546.6A patent/DE102013222546A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
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None |
Also Published As
Publication number | Publication date |
---|---|
DE112013005315A5 (en) | 2015-07-23 |
WO2014071944A3 (en) | 2014-08-28 |
DE112013005315B4 (en) | 2020-01-30 |
DE102013222546A1 (en) | 2014-05-08 |
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