WO2015165449A1 - Vorrichtung zur kraftsimulation an einem betätigungselement eines fahrzeuges, vorzugsweise ein pedalsimulator - Google Patents
Vorrichtung zur kraftsimulation an einem betätigungselement eines fahrzeuges, vorzugsweise ein pedalsimulator Download PDFInfo
- Publication number
- WO2015165449A1 WO2015165449A1 PCT/DE2015/200214 DE2015200214W WO2015165449A1 WO 2015165449 A1 WO2015165449 A1 WO 2015165449A1 DE 2015200214 W DE2015200214 W DE 2015200214W WO 2015165449 A1 WO2015165449 A1 WO 2015165449A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- cylinder
- medium
- opening
- resistance element
- 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
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
- B60T8/326—Hydraulic systems
Definitions
- the invention relates to a device for force simulation on an actuating element of a vehicle, preferably a pedal simulator, which conveys a haptic feedback via a predetermined force-displacement behavior, comprising a piston-cylinder unit, wherein a piston is connected via a piston rod with the actuating element which axially moves the piston within the cylinder.
- a pedal force simulator for a vehicle brake system with electronic signal transmission in which a dependent of the foot force of the driver driving the braking torque, in particular by means of electro-hydraulic shear or electro-mechanical systems is performed, wherein the Pedal Force Simulator generated a familiar for a vehicle driver brake feel.
- the pedal force simulator comprises a pneumatically operated piston-cylinder unit whose piston delimits a compression chamber with a controllable valve and counteracts the compression direction by means of at least one first spring element, the piston with a force and is operatively connected via a piston rod with a vehicle brake pedal so that the piston rod undergoes an angular change relative to the piston-cylinder unit during actuation of the vehicle brake pedal.
- This angular mobility makes high demands on the construction of the pedal force simulator.
- DE 10 2010 061 439 A1 discloses a brake system for a motor vehicle, in which a brake pedal, which can be actuated by a driver, is connected to a pedal simulator for generating a path-dependent counteracting or restoring force.
- the position of the brake pedal is detected by means of a sensor and its sensor signal is supplied to the control unit for evaluation.
- the control unit Corresponding to the position of the brake pedal, the control unit generates control signals for a drive control unit and a brake control unit, so that a regenerated braking component generated thereby generates, together with the friction brake portion, a braking torque or a braking action which corresponds to the position of the brake pedal.
- the pedal simulator is actuated by the control unit in such a way that an opposing force or restoring force acts on the brake pedal, ie a path-force dependency is established which gives the driver a pedal feel, as in braking only with a hydraulic brake system.
- the invention has for its object to provide a device for force simulation on an actuator of a motor vehicle, which transmits the driver the same feeling as in a normal hydraulic system and still easy to manufacture.
- the object is achieved in that in the cylinder a resistance element protrudes radially, which divides the cylinder into two cavities, which are both filled with a medium and the resistance element approximately centrally comprises an opening whose radial extent in response to a pressure of the varies from the piston pressed into the opening medium.
- the size of the device for force simulation corresponds to the size of a master cylinder in a hydraulic clutch actuation system, so that no further requirements are placed on the space requirement in the motor vehicle, which is why the power simulator can be installed instead of the master cylinder at the same point in the vehicle.
- a resistance element is to be understood as meaning a projection-like element protruding into the medium, which presents a mechanical resistance to the medium. The opening of the resistance element is determined by the pressure of the medium, which is transmitted from the actuating element to the working piston.
- a self-adjustable resistance element which realizes an automatic adjustment of the diameter of the opening depending on the actual applied to the pedal forces, which transfers the medium as pressure, which is why depending on the applied pressure, a different volume from the first into the second cavity of the cylinder can be transported.
- the resistance element has an engagement surface, which is aligned at a predetermined angle to a direction of movement of the medium and is attached via a stretchable element to a housing. Due to the attack surface set in an angle, the pressure of the medium reaches perpendicular to the resistance element, wherein the force resulting from the pressure can be decomposed into different partial forces, which act in different directions within the resistance element. In particular, the partial force which is perpendicular to the direction of movement of the medium occurs, causes the expansible element moves, whereby the opening assumes different diameters.
- the extensible element as a function of an operating speed of the actuating element determinable.
- the pressure force is determined, depending on the diameter of the opening adjusts.
- the force-displacement characteristic is simulated, which acts on the foot or on the hand of the vehicle user via the actuating element.
- the expansible element is provided with a holding mechanism which keeps constant an extension of the expansible element via the actuating travel of the actuating element.
- the position of the expansible element which is compressed in dependence on the pressure dependent on the operating speed by a certain way, is frozen by means of the holding mechanism.
- the medium flows along the narrowed or widened opening, the change of a flowing through volume of the medium and thus dependent on the dimension of the opening and the flow rate change in the pressure conditions in the interior of the cylinder from the first cavity into the second cavity.
- the holding mechanism is designed as a two-armed latching mechanism, each arm having a latching nose, which are opposite and engage in one, two opposing recesses, which are formed on a housing surrounding the latching mechanism.
- a locking mechanism is structurally simple to manufacture and self-retaining, so it is possible to dispense with additional components.
- the arms of the latching mechanism are connected to a spreading element, which communicates via a mechanical connection with the piston rod in connection, wherein the expansion element is stretched during actuation of the actuating element and the arms of the latching mechanism engage in the recesses, while in a provision of the Actuating element, the expansion element is relaxed, the arms of the locking mechanism can be brought out of the recesses.
- the latching mechanism at a rest position of the actuating element assumes its starting position, which he leaves at the next actuation of the actuating element and engages in one of the recesses formed at different heights.
- the piston has a working piston, which is connected to the piston rod, being arranged on the working piston on a side facing away from the piston rod, a smaller diameter than the working piston auf josder secondary piston, which engages in the opening and wherein the medium with varying Volume between the secondary piston and the resistance element is pressed by the working piston from the first into the second cavity. Due to this tapered diameter of the secondary piston and the incompressible medium flowing between the resistance element and the secondary piston, a force difference is produced which can be felt haptically on the actuating element by the vehicle user. Such actuation of the secondary piston takes place with a one-time set constant extension of the diameter of the opening.
- the secondary piston tapers to adjust the varying volume in the direction of the resistance element.
- a separating piston is positioned in the second cavity on a side of the cylinder opposite the working piston, which piston engages via a spring element on an inner wall of the cylinder.
- FIG. 1 shows a schematic diagram of an electro-hydraulic clutch actuation system
- FIG. 2 shows an exemplary embodiment of a pedal simulator of the electro-hydraulic clutch actuation system according to FIG. 1,
- Figure 3 an embodiment of the resistance element with a stretchable
- Figure 4 an embodiment of a locking mechanism of the expansible element.
- the electrohydraulic clutch actuation system 1 comprises a pedal simulator 2, which is mechanically connected to a clutch pedal 3.
- the clutch pedal 3 is actuated via a piston rod 4 in the pedal simulator 2 axially movably mounted working piston 5.
- the movement of the working piston 5 is detected by a displacement sensor unit 6 which is connected to the pedal simulator 2 and preferably integrated in this.
- Via an electrical line 7, the distance sensor unit 6 is connected to a control and power unit 8.
- the control and power unit 8 comprises an actuator, which controls the clutch 10 via a further line 9.
- the line 9 is formed in the present case as a hydraulic line.
- the control of the clutch 10 may alternatively but also be pneumatic or mechanical.
- FIG. 2 shows an embodiment of the pedal simulator 2 as used in the clutch actuation system 1 according to FIG.
- the clutch pedal 3 is fastened to the coupling rod 4 via a connection 11.
- the working piston 5 is moved axially via the coupling rod 4 as a function of the position of the clutch pedal 3.
- the cylinder 12 has at one end a guide element 13, for example, a seal or a wall opening, in which the piston rod 4 axially is stored.
- At the front end of the piston rod of the working piston 5 is connected thereto and guided circumferentially on the cylinder inner wall.
- a secondary piston 14 On the front side of the working piston 5, a secondary piston 14 is fixed, which tapers in the direction of a resistance element 15 which divides the interior of the cylinder 12 into two cavities 16, 17.
- the working piston 5 moves exclusively in the first cavity 16 of the cylinder 12th
- the resistance element 15 which is constructed annularly, for example as a shutter or throttle, forms an opening 18 with a variable diameter, in which the secondary piston 14 penetrates during the movement of the clutch pedal 3.
- a separating piston 19 is arranged in the second cavity 17, which is also slidably mounted axially movable and rests on an inner wall 22 of the cylinder 12 via an inner spring 20.
- a return spring 32 is partially arranged to the piston rod 4 and the cylinder 12.
- the resistance element 15, which is fastened with a stretchable element 21 on a housing 23 surrounding the outside of the resistance element 15, will be explained in more detail in connection with FIG.
- the resistance element 15 itself is approximately formed as a right-angled triangle and has an engagement surface 31 for the in the cylinder 12 approximately axially moving incompressible medium.
- the expansible element 21, which adjoins the resistance element 15 radially outward, is advantageously designed as a spring which assumes a predetermined position. Between the resistance element 15 and the expansible element 21 recesses 24 are arranged on both sides of the housing 23, in which a latching mechanism 25 engages.
- the locking mechanism 25 which is illustrated in Figure 4, is connected to the piston rod 4 with a mechanical connection 26, which is guided by the expansible element 21, for example a cable.
- the resistance element 15 partially surrounding housing 23 has on each side a plurality of superposed recesses 24, in which locking lugs 27 of the two-armed locking element 25 can engage.
- the two locking lugs 27 of the latching mechanism 25 are latched in the lowermost recess 24 of the housing 23 and are held by means of a, between the arms 28, 29 of the latching mechanism 25 arranged spreading element 30 in these recesses 24.
- the described pedal simulator 2 works as follows.
- the pedal movement is converted via the terminal 1 1 in a corresponding feed movement of the piston rod 4.
- the return spring 32 is compressed and tensioned, whereby a restoring reaction force is formed.
- the attached to the piston rod 4 working piston 5 is moved together with the secondary piston 14 relative to the stationary mounted cylinder 12 within this forward.
- the resistance element 15 determines, within a period of about 1 second, the pressure exerted on the engagement surface 31 during the movement of the working piston 5 by the incompressible medium.
- the expansible element 21 is biased by the resistance element 15 and held in a constant position, whereby the opening 18 assumes a certain diameter.
- the liquid volume displaced via the working piston 5 causes a movement of the separating piston 19, which is pressed against the inner spring 20 and thereby absorbs the volume of incompressible medium displaced in the first cavity 16 in the second cavity 17. Due to this configuration, the pedal simulator 2 is independent of the speed of the actuating element.
- the piston rod 4 pulls the mechanical connection 26 with the locking mechanism 25 upwards, whereby the expansion element 30 relaxed and whereby the arms 28, 29 of the locking mechanism 25 collapse and the locking lugs 27 emerge from the recesses 24.
- the latching mechanism 25 falls down, where the distance between the deepest recesses 24, which correspond to the lowest operating speed of the actuating element 3, is less than in the recesses into which the locking lugs 27 engage in a compressed expansible element 21 at higher operating speeds.
- the described pedal simulator 2 is intended for a non-hydraulic actuation system, in particular a purely electrical vehicle coupling system. Alternatively, however, it can also be used for any other actuation systems, such as brake systems, for example, which may also have any other actuation element instead of a pedal.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112015002071.3T DE112015002071A5 (de) | 2014-04-29 | 2015-03-31 | Vorrichtung zur Kraftsimulation an einem Betätigungselement eines Fahrzeuges, vorzugsweise ein Pedalsimulator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014207979.9 | 2014-04-29 | ||
| DE102014207979 | 2014-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015165449A1 true WO2015165449A1 (de) | 2015-11-05 |
Family
ID=53175217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2015/200214 Ceased WO2015165449A1 (de) | 2014-04-29 | 2015-03-31 | Vorrichtung zur kraftsimulation an einem betätigungselement eines fahrzeuges, vorzugsweise ein pedalsimulator |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE112015002071A5 (de) |
| WO (1) | WO2015165449A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016146117A1 (de) * | 2015-03-16 | 2016-09-22 | Schaeffler Technologies AG & Co. KG | Vorrichtung zur kraftsimulation an einem betätigungselement eines fahrzeuges, insbesondere in der art eines pedalkraftsimulators |
| WO2018149437A1 (de) * | 2017-02-16 | 2018-08-23 | Schaeffler Technologies AG & Co. KG | Pedalkraftsimulationsvorrichtung mit ebenem federelement sowie betätigungssystem |
| US10359802B2 (en) | 2016-08-22 | 2019-07-23 | Cts Corporation | Variable force electronic vehicle clutch pedal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830836A1 (de) * | 1988-09-10 | 1990-03-22 | Messerschmitt Boelkow Blohm | Kraftsimulation in servosteuersystemen |
| DE102010061439A1 (de) | 2010-12-21 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bremssystem für ein Kraftfahrzeug |
| DE102011016240A1 (de) * | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedalkraftsimulator |
| DE102011016239A1 (de) | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedalkraftsimulator für eine Fahrzeugbremsanlage |
| US20140069093A1 (en) * | 2012-09-11 | 2014-03-13 | Mando Corporation | Pedal simulator for active brake system |
-
2015
- 2015-03-31 DE DE112015002071.3T patent/DE112015002071A5/de not_active Withdrawn
- 2015-03-31 WO PCT/DE2015/200214 patent/WO2015165449A1/de not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830836A1 (de) * | 1988-09-10 | 1990-03-22 | Messerschmitt Boelkow Blohm | Kraftsimulation in servosteuersystemen |
| DE102010061439A1 (de) | 2010-12-21 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bremssystem für ein Kraftfahrzeug |
| DE102011016240A1 (de) * | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedalkraftsimulator |
| DE102011016239A1 (de) | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedalkraftsimulator für eine Fahrzeugbremsanlage |
| US20140069093A1 (en) * | 2012-09-11 | 2014-03-13 | Mando Corporation | Pedal simulator for active brake system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016146117A1 (de) * | 2015-03-16 | 2016-09-22 | Schaeffler Technologies AG & Co. KG | Vorrichtung zur kraftsimulation an einem betätigungselement eines fahrzeuges, insbesondere in der art eines pedalkraftsimulators |
| US10359802B2 (en) | 2016-08-22 | 2019-07-23 | Cts Corporation | Variable force electronic vehicle clutch pedal |
| US10712764B2 (en) | 2016-08-22 | 2020-07-14 | Cts Corporation | Variable force electronic vehicle clutch pedal |
| WO2018149437A1 (de) * | 2017-02-16 | 2018-08-23 | Schaeffler Technologies AG & Co. KG | Pedalkraftsimulationsvorrichtung mit ebenem federelement sowie betätigungssystem |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112015002071A5 (de) | 2017-01-26 |
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