WO2004031623A1 - Dispositif d'actionnement de frein de stationnement et dispositif de selection de gammes de vitesse pour la boite de vitesse automatique d'un vehicule a moteur - Google Patents

Dispositif d'actionnement de frein de stationnement et dispositif de selection de gammes de vitesse pour la boite de vitesse automatique d'un vehicule a moteur Download PDF

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Publication number
WO2004031623A1
WO2004031623A1 PCT/EP2003/009763 EP0309763W WO2004031623A1 WO 2004031623 A1 WO2004031623 A1 WO 2004031623A1 EP 0309763 W EP0309763 W EP 0309763W WO 2004031623 A1 WO2004031623 A1 WO 2004031623A1
Authority
WO
WIPO (PCT)
Prior art keywords
parking lock
pressure
spring
piston
actuator
Prior art date
Application number
PCT/EP2003/009763
Other languages
German (de)
English (en)
Inventor
Martin Burgbacher
Jens Dorfschmid
Ulrich Eckle
Hans-Peter Fiederlein
Joachim Gansloser
Tobias GÖDECKE
Carsten Härtel
Ulrich Korbacher
Hanno Menges
Harald Nauerz
Christian RÜGER
Dieter Tertiuk
Michel Willems
Original Assignee
Daimlerchrysler Ag
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
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2004031623A1 publication Critical patent/WO2004031623A1/fr

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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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3491—Emergency release or engagement of parking locks or brakes
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/08—Range selector apparatus

Definitions

  • the invention relates to a parking lock actuation device and a driving step selection device for an automatic transmission of a motor vehicle according to the preamble of claim 1.
  • a Parksperrenbet decisivistsein- direction and a speed selector for an automatic transmission of a motor vehicle which have a parking lock operating element in the form of a pawl and a charging energy storage in the form of a spring accumulator. If an ignition circuit of the motor vehicle is turned on, then the pawl is actuated by means of an electric motor and so the parking brake is engaged. When the ignition circuit is switched off, the inlay energy store is released by means of a selector lever in the form of a control device, a blocking lever and an unlocking lever and thus the parking brake is engaged. At the same time, the energy level of the charging energy storage unit changes. When the parking lock is engaged, an output shaft of the automatic transmission is blocked, so that the motor vehicle is secured against rolling away.
  • the parking lock actuation device is in operative connection with a hydraulic system of the automatic transmission, at least via a parking lock pressure.
  • the automatic transmission is controls, so hydraulic elements, such as clutches, brakes and hydraulic pistons are driven to perform a gear change or intendeds selectedung in the automatic transmission.
  • a starting clutch can be controlled with the hydraulic system.
  • the automatic transmission can be designed as a planetary gear, a continuously variable transmission or as an automated manual transmission with single or double clutch.
  • the operative connection can be embodied, for example, as a hydraulic line between the hydraulic system and a hydraulic piston of the parking brake actuating device.
  • the inlay energy storage which may be embodied for example as a spring accumulator or a hydraulic or pneumatic pressure accumulator, can be released by means of a change of a parking interlocking pressure of the hydraulic system and thus the parking brake can be engaged.
  • the release of the energy store is understood to mean that the stored energy is released and thus, for example, a movement of a component of the parking lock operating device is caused. This can be a complete or partial release.
  • the release may consist in a complete release, ie in an influencing of the movement of the component only by the charging energy storage, or in a conditional release, ie the release in accordance with another operating parameter or a control or regulation.
  • a working pressure in the hydraulic system and thus also the parking lock pressure are generated by a pump, which can be electrically driven, for example, by an engine of the motor vehicle. It is also possible that in addition to a pump driven by the drive machine, an electrically driven auxiliary pump is provided which generates the working pressure when the drive machine is switched off. The shutdown can be done, for example, by a vehicle driver or by an automated start Stop device done.
  • the parking lock pressure can be derived and adjusted by means of one or more valves from the working pressure.
  • the parking barrier pressure can not exceed the working pressure.
  • the parking lock operating device By coupling with the existing hydraulic system of the automatic transmission, a simple and inexpensive parking lock operating device is made possible, since the parking lock operating device has few components.
  • the parking lock operating device it is possible to integrate the parking lock operating device into the hydraulic system, for example into a so-called circuit board.
  • the parking brake actuator requires very little space.
  • the circuit board including parking lock actuator can be checked as a unit. This ensures that only functional units are mounted.
  • Another advantage of integration is that the hydraulic line is short, resulting in less leakage and vibration problems.
  • the inlaid energy storage is triggered at a fall in the parking barrier pressure below a threshold and thus the parking brake engaged.
  • the limit value is dependent on the design of the insert energy storage device and can thus be predetermined and / or set by design.
  • the parking lock pressure can either be set below the limit value by means of said valves or the working pressure and thus also the parking lock pressure fall below the limit value.
  • a decrease in the working pressure below the limit can be caused by a shutdown of the prime mover or by a failure of the electrically driven pump. In both cases, no pressure is available in the hydraulic system for the actuation of hydraulic elements, for example, for a gear change or an engagement of the parking brake by means of a hydraulic actuator.
  • the parking brake In case of a driven by the prime mover pump is thus engaged in a shutdown of the engine, the parking brake. Thus, the motor vehicle is immediately secured against rolling or pushing away. Thus, the motor vehicle is effectively protected against theft. By inserting the parking brake in the event that the parking brake pressure drops below the specified limit, so that a particularly safe operation of the motor vehicle is guaranteed.
  • the parking lock is designed in particular so that it engages only below a limit speed of the motor vehicle and thus blocks an output shaft of the automatic transmission.
  • the parking lock operating element is pretensioned by means of the infeed energy store.
  • the parking lock then locks.
  • the energy level of the charging energy storage can be increased by means of the parking barrier pressure.
  • the insert energy storage energy for example in the form of a tension of the spring of a spring accumulator or an increase in the pressure of a pressure accumulator supplied.
  • the insert energy storage is filled when laying out the parking brake. Thus, no components for refilling the inlay energy storage are necessary. This allows a particularly simple and cost-effective design of the parking lock operating device.
  • the Parksperrenbet2011i- supply device via an unlocking device by means of which the parking brake on the parking lock operating element can be interpreted.
  • the unlocking device has an unlocking energy store, with which the parking brake can be interpreted by a vehicle driver or a hydraulic pressure without a force acting on the parking lock operating element. This is next to an effective theft protection the Possibility of towing the motor vehicle given.
  • the unlocking energy storage can be triggered by means of an actuator or by a driver.
  • the actuator can be designed, for example, as a solenoid, which can be controlled by a control device. For a simple and inexpensive integration of the unlocking device in the circuit board is possible. Furthermore, in addition to an effective theft protection and the possibility to tow the vehicle is given.
  • the unlocking device can also be designed without unlocking energy storage.
  • the necessary energy can be supplied for example by the driver via a Bowden cable or a connecting rod.
  • the parking brake actuation device is used in a drive level selection device.
  • the speed selector has a second actuator and a selector slide, wherein by means of the actuator and the selector slide different speed levels of the automatic transmission are adjustable. From the speed selector, driving levels, for example, "P", “R”, “N” and “D", which are selected by the driver by means of a selector lever, are adjusted in the hydraulic control of the automatic transmission by a shift or rotation of the selector.
  • driving levels for example, "P", “R”, “N” and “D"
  • the selector valve can also have only the positions “R", “N u and” D “in the transmission, wherein the selector slide in the selector lever position” P "then assumes the position" N "(neutral).
  • Said actuator may be embodied, for example, as an electric motor, a hydraulic motor, a hydraulic or pneumatic piston-cylinder unit or a valve which releases or shuts off a pressure on the selector slide.
  • the speed selector has a detent by means of which a • set speed in the automatic transmission can be locked.
  • the gear in the automatic transmission is secured without the use of the actuator. This is necessary, above all, in the case of a transition from a normal operation to an emergency operation, in which the driving-range selection device is no longer fully functional.
  • With the detent ensures that in the said transition the set gear is maintained and the motor vehicle remains operational within certain limits.
  • the second actuator, the selector slide, the parking lock operating element and the inlay energy storage with a connecting element, for example in the form of a detent plate in operative connection.
  • the parking brake is also operable with the second actuator, which allows a particularly simple and inexpensive combination of parking brake actuator and Fahrgen flirtl immunity.
  • the detent has a cylinder-piston unit and a Rastier- energy storage, wherein the cylinder-piston unit can be acted upon with a locking pressure of the hydraulic system. If the locking pressure is greater than a limit, then the detent is active and the gear is secured. If the locking pressure falls below the stated limit value, the detent is released by the locking energy storage device.
  • the locking pressure can be adjusted by means of a valve. This can be ner change the gear detent be canceled and the detent must not, as in a purely mechanical solution, be suppressed. Thus, small adjustment forces are necessary for the change of a gear. Thus, the necessary actuators are inexpensive and / or require little space.
  • the detent is canceled without further action at a decrease in the working pressure and the connecting element can by means of the insert energy storage in a position which; In this way, the selector slide is placed in the appropriate position and the parking brake is engaged.
  • the selector slide has two opposing active surfaces, which can be acted upon by an adjusting pressure of the hydraulic system. Accordingly, the selector slide is movable in both possible directions and the speed levels are adjustable in the automatic transmission.
  • the pressures on the active surfaces are adjustable with one or more valves, which can be controlled by the control device of the automatic transmission.
  • Parking lock operating device for an automatic transmission of a motor vehicle 1 b shows a locking device of the speed step selection device in FIG. 1 a,
  • Fig. 2 is a Fahrgenmonlised with a
  • Fig. 3a is a Fahrgencommunl Human Interface
  • Fig. 4 is a Fahrgencommunl Human Interface
  • Fig. 5 is a parking lock operating device with an unlocking device.
  • Fig. La has a speed selector 10 for an automatic transmission, not shown, via a connecting element in the form of a detent plate 11, which may be made of sheet metal, for example.
  • the detent plate 11 is rotatably mounted on a shaft 12.
  • the detent plate 11 has a spur gear toothing 14 in which an output shaft 15 of an actuator in the form of an electric motor 16 engages.
  • the output shaft 15 is arranged parallel to the shaft 12.
  • the electric motor 16 is driven by a control device, not shown.
  • the detent plate 11 Between the end face 13 and the shaft 12, the detent plate 11 has a pin 17 which is partially enclosed by an end 19 of a connecting bracket 18.
  • the opposite end 20 of the connecting bracket 18 is connected to a constructed of zylinderför igen sections selector slide 21.
  • the selector slide 21 can be moved by means of the electric motor 16 in the axial direction.
  • different driving levels are can be set by enabling or closing different channels in a hydraulic control, depending on the driving position. 4 positions (“P ⁇ " R w , "N u and, D tt ) can be set with the illustrated selector slide.
  • a second pin 23 is arranged on the end face 13 with respect to the shaft 12 opposite side 22 of the detent plate 11.
  • the pin 23 is enclosed by an end 25 of a parking lock operating element in the form of a parking lock cone 24.
  • the parking lock cone 24 is ' aligned so that upon rotation of the detent plate 11 about the shaft 12 of the selector slide 21 and the parking lock cone 24 perform opposite movements.
  • the parking lock cone 24 has a rod 26 and coaxially arranged on a, opposite the end 25, mainly cylindrical portion 27 on.
  • the cylindrical portion 27 has chamfers 28 on its base surfaces.
  • the parking lock cone 24 can also be moved by means of the electric motor 16 in the axial direction.
  • a pawl, not shown brought into engagement with a parking lock gear, not shown, and thus a parking brake can be engaged.
  • an output shaft of the automatic transmission is blocked.
  • the detent plate 11 On the latch plate 11 a locking device 29 is arranged.
  • the detent plate 11 has 4 juxtaposed bores 30, 31, 32, 33. In this case, each bore is associated with a drive stage of the automatic transmission.
  • the holes 30 ("P"), 31 ("R”), 32 ("N”), 33 ("D , ⁇ ) are marked with the individual speed steps.
  • Fig. Lb an area around the bore 33 of the detent plate 11 is shown in a side view.
  • a ball 34 In the bore 33 engages a ball 34, which is pressed by a spring 35 against the bore 33.
  • the spring 35 is supported on a Housing part 36 from.
  • a fixedly connected to the housing part sleeve 37 surrounds the spring 35 completely and the ball 34 partially.
  • the parking lock operating device 38 has a piston-cylinder unit 39 with a cylinder 40 and a piston 40 guided in the cylinder 40.
  • the cylinder 40 is connected by means of a pressure line 42 to a hydraulic system 43 of the automatic transmission.
  • a working pressure of the hydraulic system 43 is generated by a pump 44 which is driven by an unillustrated prime mover of the motor vehicle.
  • the piston 41 is connected to an actuating rod 45.
  • the cylinder 40 opposite end 46 of the actuating rod 45 is angled.
  • a third pin 47 of the detent plate 11 is arranged so that by means of the actuating rod 45, a clockwise oriented torque can be exerted on the detent plate 11.
  • the operation Transmission element 45 is guided by a support member 48 which is connected immovably with a housing, not shown, of the automatic transmission.
  • a charging energy storage in the form of a spring 49 is arranged between the support element 48 and the piston 41.
  • the prime mover is in operation and the pump 44 generates a working pressure.
  • This also acts in the cylinder 41 sufficient parking lock pressure, which exerts sufficient force in the direction of the support member 48 on the piston 41.
  • the spring 49 is stretched and the insert energy storage is at a high energy level.
  • the force acting on the cylinder 41 force of the spring 49 is greater than the generated by the parking lock pressure, opposite force.
  • the cylinder 41 is pressed by the spring 49 while changing the energy level of the support member 48 away.
  • the actuating rod 45 is moved in the direction mentioned and via the pin 47, a torque is generated on the detent plate 11, which rotates the detent plate 11 in the clockwise direction.
  • the spring 49 is designed so that the detent plate 11 is rotated to its stop in the driving position "P" and thus the parking brake is engaged.
  • the actuator can also be designed as a hydraulic motor whose output shaft engages in the same manner as the output shaft of the illustrated electric motor in a toothing of the detent plate.
  • the hydraulic motor can via suitable Valves to be connected to the hydraulic system of the automatic transmission.
  • a speed dial 110 is shown with a parking lock actuator 138 in a second embodiment.
  • the operation of a selector slide 121 is comparable to the operation of the selector slide 21 in Fig. La.
  • a detent plate 111 has an end surface 113 via a worm gear 114 instead of a spur gear.
  • this Schne ⁇ yer leopardung 114 engages an output shaft 115 of an electric motor 116 a.
  • the output shaft 115 is aligned perpendicular to a shaft 112, on which the detent plate 111 is rotatably mounted.
  • a determination of the engaged gear in the sense of a detent is achieved by a self-locking of the worm toothing between the detent plate 111 and output shaft 115 of the E- lektromotors 116.
  • the parking lock actuator 138 is not connected to the gear selector 110.
  • the parking brake actuation device 138 likewise has a parking lock cone 124 by means of which, as described, the parking brake can be inserted.
  • One end 125 of the parking lock cone 124 is connected to a pressure side 150 of a piston 151 of a piston and cylinder unit 152.
  • an insert energy storage in the form of a spring 155 is arranged between one of the pressure side 150 opposite spring side 153 of the piston 151 and a housing part 154.
  • a pressure chamber 157 resulting from the piston 151 in a cylinder 156, which is arranged in the direction of the parking lock cone 124, is connected by means of a pressure line 158 to a hydraulic system 143 of the automatic transmission.
  • valve 159 By means of a valve 159, which can not be adjusted directly or with the interposition of other unillustrated valves by a control device, not shown, the connection to a pump 144 can be made or interrupted.
  • the pump 144 is driven by a drive machine, not shown. If the connection is interrupted by means of the valve 159, the pressure chamber 157 is connected to a tank, not shown, so that an optionally existing pressure in the pressure chamber 157 is reduced.
  • the piston 151 thus acts on the one hand ' the force of the spring 155 in the direction ' of the parking lock cone 124 and on the other hand, an opposite force which is generated by a prevailing in the pressure chamber 157 parking lock pressure.
  • the pressure chamber 157 connected by means of the valve 159 with the pump 144 corresponds to the working pressure of the hydraulic system 143.
  • the working pressure and thus the parking lock pressure is so high that the piston 151 against the force of the spring 155 in Direction of the housing part 154 is pressed.
  • the parking lock cone 124 connected to the piston 151 is thus also displaced in this direction and the parking lock is designed. This position is shown in FIG.
  • the parking lock is engaged when the parking lock pressure falls below a limit.
  • the force of the spring 155 ' is greater than the counteracting force and the cylinder 151 is pushed away from the housing part 154.
  • the parking lock cone 124 moves away from the housing part and the parking lock is engaged.
  • the parking lock pressure may fall below the limit when the connection of the pressure chamber 157 to the pump 144 is interrupted or the working pressure of the hydraulic system 143 falls below the threshold.
  • the working pressure for example, fall below the limit when stopping the engine. With sufficient working pressure, the parking brake can thus be switched on and off by means of the valve 159.
  • a speed dial 210 is shown with a parking lock actuator 238 in a third embodiment.
  • 1a has a connecting element in the form of a detent plate 211.
  • the actuation of a selector slide 221 and a parking lock cone 224 and thus the engagement and disengagement of the parking lock is identical to the embodiment in FIG ,
  • the detent plate 211 can be rotated about a shaft 212 by means of an actuator in the form of a piston-cylinder unit 260.
  • a piston 261 is connected to a spring side 262 by means of a rod 263 with a pin 247 arranged on the detent plate 211.
  • the rod 263 is guided by a support element 264, which is immovably connected to a housing, not shown, of the automatic transmission. Between the support element 264 and the spring side 262 of the piston 261, a charging energy storage in the form of a spring 265 is arranged.
  • a valve 270 which is adjustable either directly or with the interposition of other unillustrated valves by a control device, not shown, the connection to a pump 244 can be made or interrupted. The pump 244 is driven by a drive machine, not shown. If the connection is interrupted by means of the valve 270, the pressure chamber 267 is connected to a tank, not shown, so that an optionally existing pressure in the pressure chamber 267 is reduced.
  • the positions of the detent plate 211 in the various speed stages correspond to positions of the piston 261 in the cylinder 266.
  • the driving step selection device 210 has a locking device 229.
  • the detent plate 211 has four bores 230, 231, 232, 233. Each hole is assigned a gear of the automatic transmission.
  • FIG. 3b and 3c an area around the bore 233 of the detent plate 211 is shown in a side view.
  • the locking device 229 has a plunger 271, which can be inserted into the bore 233.
  • the plunger 271 is connected to a piston 272, which is guided in a cylinder 273.
  • a spring 274 is arranged, which exerts on the plunger 271 a force which would like to push the pin 272 out of the bore 233.
  • a pressure chamber 275 resulting from the piston 272 in the cylinder 273 is connected to the hydraulic system 243, not shown in FIGS. 3b and 3c. This can be set in the pressure chamber 275 a parking lock pressure.
  • the driving position "D" is engaged and the parking lock pressure in the pressure chamber 275 is greater than the limit value the latching plate 211 is rotated clockwise by means of the piston-cylinder unit 260.
  • the pressure chamber 267 is separated from the pump 244 by means of the valve 270 and the parking barrier pressure in the pressure chamber 275 of the latching device 229 is lowered below the limit value
  • the parking locking pressure is increased and the position is held by means of detenting 229.
  • sensors can position themselves on the cylinder 266 or be arranged on the detent plate 211 for measuring the position of the detent plate.
  • the pressure chamber 267 is connected to the pump 244 by means of the valve 270.
  • the pressure in the pressure chamber 267 corresponds to the working pressure and the piston 261 becomes a force in
  • the parking-barrier pressure in the pressure chamber 275 of the locking device 229 is reduced below the limit value and the detent is released and the desired position of the detent plate 211 is recorded as described
  • the pressure in the pressure chamber 267 may be adjustable by means of other valves.
  • a speed dial 310 is shown with a parking lock actuator 338 and a parking lock cone 324 in a fourth embodiment.
  • the parking brake actuation device 338 has an infeed energy store in the form of a spring 355.
  • the parking lock actuation device 338 is identical and designed with the same mode of operation as the parking lock actuation device 138 in FIG. 2. The parking lock operating device 338 will therefore not be discussed further.
  • the gear selector 310 has a selector slide 321 which is guided in a cylinder 372.
  • a contour element 373 of the selector slide 321 projects out of the cylinder 372 in the axial direction.
  • the different speed stages in the automatic transmission are adjustable.
  • two pressure chambers 376, 377 are formed, which are connected to pressure lines 378, 379 with a hydraulic system 343 of the automatic transmission.
  • valves 380, 381 the pressure lines 378, 379 can be interrupted.
  • a pump 344 which depends on a driving machine of the motor vehicle is driven, a working pressure.
  • the drive level selection device 310 also has a locking device 329.
  • the locking device has a spring 335, which is supported on a housing part 336 and a ball 334 presses in the radial direction against the contour element 373.
  • a sleeve 337 which is fixedly connected to the housing part 336, surrounds the spring 335 completely and the ball 334 partially.
  • the contour element 373 is shaped so that the ball 334 is pressed into an indentation of the contour element 373 in an axial position of the selector slide 321, which corresponds to a drive step, and the selector slide 321 is thus fixed in the axial direction.
  • valves for connecting and disconnecting the pressure chambers with the hydraulic system can also be combined in a valve. If after a shutdown of the engine and the associated drop in the working pressure of the selector slide or the parking brake are still to be operated, a pressure accumulator can be provided in the hydraulic system, which provides a necessary for single or multiple actuation pressure.
  • a parking lock actuator 438 is shown.
  • the parking lock operating device 438 has a parking lock cone 424, by means of which, as described, the parking lock can be switched on and laid out. In the illustrated position of the parking lock cone 424, the parking lock is engaged.
  • One end 425 of the parking lock cone 424 is connected to a lever 482, which is rotatably mounted on a bearing 483 which is fixedly connected to the housing of the automatic transmission. Upon rotation of the lever 482 about the bearing 483, the parking lock cone 424 is displaced in the axial direction.
  • the lever 482 is connected via a rod 484 with an actuating piston 485, which is arranged axially displaceably in a cylinder 486.
  • a charging energy storage in the form of a spring 488 is arranged.
  • the spring 488 exerts a force on the actuating piston, which is directed away from the bearing 483.
  • the parking lock operating device 438 has an unlocking device 497.
  • a delivery piston 489 is additionally arranged in the cylinder 486.
  • an unlocking energy storage in the form of a spring 491 is arranged between an end 487 opposite the end 490 of the cylinder 486 and the Auslegekolben 489.
  • the spring 491 exerts a force on the Auslagkolben 489 in the direction of the bearing 483 and presses the Auslegekolben 489 against a lock in the form of a solenoid 492, which is controlled by a control device 493.
  • a pressure chamber 494 formed by the actuating piston 485, the planning piston 489 and the cylinder 486 is connected to a pressure line 495 with a hydraulic system 443 of the automatic transmission.
  • a parking barrier pressure By means of a valve 496, the connection to a pump 444, which by a drive motor of the motor vehicle powered or powered off. If this connection is made and the working pressure generated by the pump 444 is large enough, a force acts on the actuating piston 485 in the direction of the bearing 483 which moves the actuating piston 485 against the force of the spring 488 in the direction of the bearing 483.
  • the lever 482 makes a counterclockwise rotation and the parking lock is disengaged.
  • the then reached position of the lever 482 is shown in dashed lines. If the parking lock pressure falls below a limit, the force of the spring 488 on the actuating piston is greater than the oppositely acting force. Thus, the actuating piston 485 is moved away from the bearing 483 and the lever 482 thus performs a clockwise rotation. This will engage the parking brake.
  • a decrease in the parking brake pressure below the limit can be achieved by interrupting the connection between the pressure chamber 494 and the hydraulic system and simultaneously connecting the pressure chamber 494 with a tank, not shown. Furthermore, by lowering the working pressure, for example by stopping the drive machine, the parking barrier pressure may drop. An interpretation of the parking brake with no longer sufficient working pressure is thus not possible without the unlocking device 497.
  • the control device 493 controls the solenoid 492 in such a manner that the locking of the extension piston 489 is canceled and thus the extension piston 489 is moved in the direction of the bearing 483 by means of the spring 491.
  • the spring 491 is designed so that the extension piston 489 is moved so far that it meets the actuating piston 485 and this also moves with.
  • the lever 482 makes a counterclockwise rotation and the parking lock is disengaged.
  • the extension piston 489 is returned to its position against the force of the spring 491. Asked starting position moves and locked by means of the solenoid 492.
  • the unlocking device 497 is thus ready for use again.
  • the actuating piston 485 is moved against the force of the spring 488 in the direction of the bearing 482 and thus designed the parking brake.
  • the energy level of the charging energy storage in the form of the spring 488 is increased by means of the parking lock pressure.
  • the various energy storage devices can also be supplied with energy again by means of a further energy source, for example an electric pump, or a further energy store, for example a pressure accumulator or a condenser, thus enabling further actuation of the selector slide or the parking brake.
  • a further energy source for example an electric pump
  • a further energy store for example a pressure accumulator or a condenser
  • the different gears of the automatic transmission can also be adjusted without a selector slide. This can be realized for example by directly controllable by a controller valves.
  • the mentioned cylinders can be designed as bores, for example in a so-called control plate

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Abstract

L'invention concerne un dispositif d'actionnement de frein de stationnement (38) pour la boîte de vitesse automatique d'un véhicule à moteur. Lors du déblocage d'un ressort (49) un frein de stationnement est mis en place par l'intermédiaire d'un cône de frein de stationnement (24). Selon l'invention, ledit dispositif d'actionnement de frein de stationnement (38) est en liaison active avec le système hydraulique (43) de la boîte automatique, par l'intermédiaire de la pression du frein de stationnement. Le ressort (49) est relâché en dessous d'une valeur seuil, lors de la diminution de la pression du frein de stationnement, ledit frein de stationnement pouvant alors être mis en place.
PCT/EP2003/009763 2002-09-28 2003-09-03 Dispositif d'actionnement de frein de stationnement et dispositif de selection de gammes de vitesse pour la boite de vitesse automatique d'un vehicule a moteur WO2004031623A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002145386 DE10245386A1 (de) 2002-09-28 2002-09-28 Parksperrenbetätigungseinrichtung und Fahrstufenwähleinrichtung für ein Automatikgetriebe eines Kraftfahrzeugs
DE10245386.1 2002-09-28

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Publication Number Publication Date
WO2004031623A1 true WO2004031623A1 (fr) 2004-04-15

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CN102889379A (zh) * 2011-07-21 2013-01-23 现代自动车株式会社 驻车制动系统
EP2696111A1 (fr) * 2012-08-09 2014-02-12 GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG Agencement d'actionneurs pour une chaîne cinématique
US10041591B2 (en) 2015-07-13 2018-08-07 Ford Global Technologies, Llc Transmission park mechanism
US10995855B2 (en) 2019-05-16 2021-05-04 Ford Global Technologies, Llc Vehicle park lock assembly with support block and supporting method for vehicle park lock assembly

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DE102004030007A1 (de) * 2004-06-22 2006-03-02 Zf Friedrichshafen Ag Aktuatorvorrichtung zum Betätigen eines Verriegelungsmechanismus
DE102005029966B4 (de) * 2005-06-28 2017-03-16 Volkswagen Ag Parksperren-Vorrichtung für das Getriebe eines Kraftfahrzeuges
DE102005053610A1 (de) * 2005-11-10 2007-05-16 Kostal Leopold Gmbh & Co Kg Schalthebelanordnung für ein Kraftfahrzeug
DE102006022963A1 (de) * 2006-05-12 2007-11-15 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Getriebesperre
DE102009035348A1 (de) 2009-07-30 2011-02-03 Volkswagen Ag Parksperrenvorrichtung
DE102010043257A1 (de) 2010-11-03 2012-05-03 Zf Friedrichshafen Ag Vorrichtung zum Betreiben einer Parksperreneinrichtung
DE102012210571A1 (de) 2012-06-22 2013-12-24 Zf Friedrichshafen Ag Vorrichtung zum Betätigen eines Verriegelungsmechanismus
DE102013223613A1 (de) * 2013-11-20 2015-05-21 Zf Friedrichshafen Ag Parksperrensystem für ein Kraftfahrzeuggetriebe
US10018271B2 (en) 2014-08-21 2018-07-10 Ford Global Technologies, Llc System for detecting park state of a transmission
DE102016214682B4 (de) 2016-02-15 2022-04-14 Magna powertrain gmbh & co kg Sperranordnung
DE102017218748A1 (de) * 2017-10-19 2019-04-25 Zf Friedrichshafen Ag Parksperre für ein Automatgetriebe in einem Kraftfahrzeug
DE102019216851A1 (de) * 2019-10-31 2021-05-06 Zf Friedrichshafen Ag Betätigungsvorrichtung für eine Parksperrenvorrichtung eines Kraftfahrzeugs
DE102020114932B4 (de) 2020-06-05 2022-02-03 Schaeffler Technologies AG & Co. KG Parksperre in einer normal-gesperrten Konfiguration für eine Parksperrenvorrichtung eines Getriebes

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CN102889379A (zh) * 2011-07-21 2013-01-23 现代自动车株式会社 驻车制动系统
US20130020171A1 (en) * 2011-07-21 2013-01-24 Hyundai Motor Company Parking brake system
US9004254B2 (en) * 2011-07-21 2015-04-14 Hyundai Motor Company Parking brake system
EP2696111A1 (fr) * 2012-08-09 2014-02-12 GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG Agencement d'actionneurs pour une chaîne cinématique
US9261188B2 (en) 2012-08-09 2016-02-16 Getrag Getriebe-Und Zahnradfabrik Herman Hagenmeyer Gmbh & Cie Kg Actuator arrangement for a drive train
CN103574023B (zh) * 2012-08-09 2017-09-08 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 用于传动系的致动器装置
US10041591B2 (en) 2015-07-13 2018-08-07 Ford Global Technologies, Llc Transmission park mechanism
US10995855B2 (en) 2019-05-16 2021-05-04 Ford Global Technologies, Llc Vehicle park lock assembly with support block and supporting method for vehicle park lock assembly

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