EP4193079A1 - Method for resetting a parking lock operating system and parking lock operating system - Google Patents
Method for resetting a parking lock operating system and parking lock operating systemInfo
- Publication number
- EP4193079A1 EP4193079A1 EP21742695.6A EP21742695A EP4193079A1 EP 4193079 A1 EP4193079 A1 EP 4193079A1 EP 21742695 A EP21742695 A EP 21742695A EP 4193079 A1 EP4193079 A1 EP 4193079A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- parking lock
- pressure
- actuation system
- pressure threshold
- locking
- 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.)
- Withdrawn
Links
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
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- 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
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
- F16H63/3433—Details of latch mechanisms, e.g. for keeping pawls out of engagement
Definitions
- the invention relates to a method for resetting a parking lock actuation system for a motor vehicle, the parking lock actuation system having a basic position in which a parking lock of the parking lock actuation system is active, and a transport position in which the parking lock is active. Furthermore, the invention relates to a parking lock actuation system.
- a disadvantage of the prior art is that when a so-called transport mode is provided, in addition to a normal mode/driving mode after a power failure, it is necessary to check the state/position of the parking lock actuation system.
- the parking lock actuation system is in the home position or in a transport position, in each of which (to ensure a Normally P function) the parking lock is active.
- the current position of the parking lock actuation system is decisive for which position the parking lock actuation system switches to by applying pressure. It is known to provide a sensor that detects a position of the parking lock actuation system, but this is expensive and entails an increased control effort.
- the object of the invention is achieved by a method for resetting a parking lock actuation system having the features of patent claim 1 and by a parking lock actuation system having the features of the independent patent claim.
- Advantageous developments are the subject of the subclaims.
- the parking lock actuation system is switched from the basic position as well as from the transport position to the basic position when a pressure present in a hydraulic medium supply line of the parking lock actuation system is increased twice in succession above a second pressure threshold and after each time the pressure increases above the second pressure threshold, it is lowered below a first pressure threshold, which is at a lower pressure value than the second pressure threshold.
- This means that the parking lock actuation system is increased above a second pressure threshold for resetting, then lowered below a first pressure threshold, then increased above the second pressure threshold and then lowered again below the first pressure threshold.
- a wake-up procedure is provided which, after an error, such as a power failure, advantageously allows the parking lock actuation system to be switched to its basic position in an operable manner, regardless of the initial position, namely the basic position or the transport position .
- the parking lock actuation system that is in the basic position can be switched to a driving position in which the parking lock is inactive and activation of the parking lock when a holding magnet of the parking lock actuation system is energized is blocked when the pressure present in a hydraulic fluid supply line is increased above the second pressure threshold .
- the parking lock actuation system that is in the driving position can be switched to the basic position when the pressure present in a hydraulic fluid supply line is lowered below the first pressure threshold. This means that the parking lock actuation system, if it was in its home position as a starting position, opens/activates the parking lock and closes/activates it again twice, so that it is in its home position after the pressurization-implemented wake-up procedure.
- the parking lock actuation system that is in the transport position can be switched to a detent position, in which the parking lock is inactive and activation of the parking lock is blocked by a detent mechanism of the parking lock actuation system, when the pressure present in a hydraulic medium supply line is increased above the second pressure threshold and is then lowered below the first pressure threshold.
- the parking lock actuation system located in the detent position can be switched to the basic position when the pressure present in a hydraulic fluid supply line is increased above the second pressure threshold and then lowered below the first pressure threshold.
- the parking lock actuation system if it was in its transport position as the initial position, first activates the latching in the latching position in which, for example, a limp-home is guaranteed, and then immediately deactivates it again, so that it wakes up after the pressure has been applied procedure is in its home position.
- a parking lock actuation system for a motor vehicle, with a guide link and a locking element that can be rotated and axially displaced relative to the guide link, with a position of the locking element relative to the guide link defining different positions of the parking lock actuation system, with the locking element and the guide link have corresponding sloping surfaces which are matched to one another and interact with one another in such a way that the latching element is rotated relative to the guide link when the latching element is axially displaced along the sloping surfaces by a pressure present in a hydraulic fluid supply line of the parking lock actuation system.
- the inclined surfaces are arranged in such a way that the parking lock actuation system is switched to the basic position both from a basic position, in which a parking lock of the parking lock actuation system is active, and from the transport position, in which the parking lock is active, when a pressure present in the hydraulic fluid supply line is present twice is successively increased above a second pressure threshold and is lowered after each pressure increase above the second pressure threshold below a first pressure threshold, which is at a lower pressure value than the second pressure threshold.
- the parking lock actuation system is switched to the basic position/basic position by the predetermined wake-up procedure, regardless of the position of the latching element/the position of the parking lock actuation system.
- a first inclined surface of the guide link can be arranged so that the locking element from a basic position, which defines a basic position of the parking lock actuation system, in a first direction of rotation in a first intermediate position, is twisted when the pressure is increased above the first pressure threshold.
- a second inclined surface of the guide link can be arranged in such a way that the latching element is rotated from the intermediate position into a second direction of rotation, opposite the first direction of rotation, into a driving position that defines a driving position of the parking lock actuation system, when the pressure is increased above the second pressure threshold .
- a third inclined surface of the guide link can be arranged such that the latching element is rotated from the intermediate position in the first direction of rotation into a transport position that defines a transport position of the parking lock actuation system when the pressure is lowered below the first pressure threshold.
- a fourth inclined surface of the guide link can be arranged such that the latching element is rotated from the transport position in the first direction of rotation into a second intermediate position when the pressure is increased above the second pressure threshold.
- a fifth inclined surface of the guide link can be arranged such that the latching element is rotated from the second intermediate position in the first direction of rotation into a latched position that defines a latched position of the parking lock actuation system when the pressure is lowered below the first pressure threshold.
- a sixth inclined surface of the guide link can be arranged such that the latching element is rotated from the latched position in the first direction of rotation into a third intermediate position when the pressure is increased above the second pressure threshold.
- a seventh inclined surface of the guide link can be arranged so that the locking element from the third intermediate position to the first Direction of rotation is twisted into the basic position when the pressure is lowered below the first pressure threshold.
- the latching element is thus rotated in the first direction of rotation or in the second direction of rotation by the interaction of the inclined surfaces matched to the pressure thresholds and the control of the pressurization in order to switch between the different settings/positions.
- the invention also relates to a parking lock actuation system for a motor vehicle, preferably a hybrid or purely electric motor vehicle.
- the parking lock actuation system has an actuating element that can be coupled or is coupled to a parking lock.
- the actuating element can be moved between a locked position, in which the parking lock is active, i.e. an output component of the motor vehicle is locked against rotation, and an unlocked position, in which the parking lock is inactive, i.e. the output component of the motor vehicle is released in its rotation.
- the actuating element can be displaced along its longitudinal axis.
- the actuating element can be displaced into its unlocked position against the restoring force of a (first) spring element.
- the parking lock actuation system has a locking element that can be coupled or is coupled to the actuating element.
- the locking element is between a locking position, in which the locking element positively fixes the actuating element in its unlocked position, ie the locking of the actuating element is active, and an unlocked position, in which the actuating element can be moved between its locked position and its unlocked position, ie the locking of the actuating element is inactive is, moveable.
- the locking element can be displaced along its longitudinal axis.
- the locking element can be displaced into its locking position against the restoring force of a (second) spring element.
- the locking element is designed to positively fix/hold the actuating element in its unlocked position.
- the actuating element and the locking element are each operatively connected to a hydraulic actuating cylinder.
- the two hydraulic actuation Cylinders are also connected to a common hydraulic fluid supply line on the pressure chamber side and are matched to one another in such a way that the locking element is displaced from a lower pressure value present in the hydraulic fluid supply line and the actuating element from a higher pressure value present in the hydraulic fluid supply line, which is higher than the lower one pressure value is shifted.
- the locking element is already displaced from a lower pressure value present in the hydraulic medium supply line than the actuating element.
- a transport state of the motor vehicle can be reliably switched using simple means, so that the parking lock is unlocked/kept inactive when the hydraulic supply is depressurized. As a result, all other operating states of the parking lock actuation system can also be controlled easily.
- the locking element is between a locking position/locking preparation position, in which a release of the locking element from its locking position is positively blocked, i.e. the locking element is positively fixed/ver stet/rusted in its locking position, in particular against the disengaging force/returning force of a spring element, and a loose position , in which the locking element can be (freely) moved/displaced between its locking position and its unlocking position, displaceable, preferably rotatable.
- the locking element can also be brought into a locking position/locking preparation position, ie a stable position in which the locking element is positively fixed or can be fixed, and released from it by moving, in particular twisting, the locking element.
- the parking lock actuation system has a locking mechanism for positively holding the locking element in its locking position, which is designed in such a way that the locking element is in the locking preparatory position when the pressure present in the hydraulic medium supply line drops from a pressure value between a first pressure threshold and a second pressure threshold to a pressure value below the first pressure threshold is lowered.
- the locking element has a first degree of freedom in order to be displaced between its locking position and its unlocking position (for example by applying pressure), the first degree of freedom being formed in particular by an axial displaceability of the locking element.
- the locking element has a second degree of freedom in order to be displaced between its latching preparation position and its release position, the second degree of freedom being formed in particular by a rotation about a longitudinal axis of the locking element.
- the disadvantages can be avoided that with known parking lock actuation systems, automatic closing of the parking lock is in principle ensured, a transport state of the motor vehicle in which an on-board network is switched off or is not sufficiently charged or an internal combustion engine is switched off is not possible and the parking lock remains closed. Furthermore, the parking lock actuation system described is less complex, i.e. constructed with a small number of individual parts. Furthermore, it can be ensured that a safe state is always guaranteed in all situations, i.e. that the parking lock always closes in the event of a power failure, even in intermediate states that occur briefly during actuation.
- the first pressure threshold can/can correspond to the lower pressure value from which the locking element is displaced. speak and / or the second pressure threshold corresponds to the higher pressure value from which the actuating element is displaced.
- the latching mechanism can have a guide slot and a latching element that can be rotated and axially displaced relative to the guide slot.
- the latching element is in particular firmly connected to the locking element.
- the guide link can be firmly coupled to the locking cylinder. This has the advantage that the locking spring acting on the locking element also acts on the locking mechanism.
- the latching element and the guide slot have corresponding inclined surfaces which interact with one another in such a way that the latching element is rotated relative to the guide slot (about its longitudinal axis) when the latching element is displaced axially.
- an axial displacement of the locking element is coupled with the rotation of the locking element.
- the twisting of the locking element can also be controlled via the hydraulic medium supply line.
- An increase in the pressure value corresponds to an axial displacement of the locking element (and thus of the latching element), so that the twisting of the locking element is coupled with a displacement of the locking element, in particular into its unlocked position.
- the locking element and the guide link can be arranged and matched to the actuating cylinder and/or the locking cylinder, in particular by forming a first inclined surface on the guide link, so that the locking element is rotated in a first direction of rotation when the in the Hydraulic fluid supply line present pressure value is increased from a pressure value below the first pressure threshold to a pressure value above the first pressure threshold.
- the locking element and the guide link can be arranged and matched to the actuating cylinder and/or the locking cylinder, in particular by forming a second inclined surface (preferably perpendicular to the first inclined surface) on the guide link, so that the locking element can be moved into one (the first Direction of rotation opposite) second direction of rotation is rotated when the pressure value present in the hydraulic fluid supply line is increased from a pressure value below the second pressure threshold to a pressure value above the second pressure threshold.
- This has the advantage that the twisting of the latching element can be controlled in a targeted manner, in particular in both directions of rotation, by controlling the pressure in the hydraulic medium supply line.
- the parking lock actuation system can thus be functionally operated in normal operation without the latching element being rotated (further in the first direction of rotation) into the latching preparation position.
- the locking mechanism can be designed in the manner of an adjustment mechanism of a ballpoint pen refill.
- an adjustment mechanism is known, for example, from US Pat. No. 3,205,863 A, so that a detailed explanation is omitted.
- the locking element can be displaced into its locking position against the restoring force of a spring element, with a spring characteristic of the spring element being matched to the actuating cylinder and/or the locking cylinder in such a way that the spring force acting on the locking element is greater above the lower pressure value than below the lower pressure value.
- a force provided by the spring element and counteracting the hydraulic pressure increases with increasing axial displacement of the locking element.
- the spring element can have a first single spring arranged to resist displacement of the locking element below the lower pressure value and a second single spring arranged to resist displacement of the locking element above the lower pressure value , wherein the first individual spring have a lower spring constant than the second individual spring. This means that the locking element is first moved against the spring force of a weak spring and then (when pressure is applied with a pressure above the first pressure threshold) against the spring force of a strong spring.
- an electrically actuated holding magnet holding the actuating element in its unlocked position is present.
- the actuating cylinder and the locking cylinder are matched to one another in such a way that when the pressure is reduced, starting from a pressure above the higher pressure value, the hydraulic pressure within the actuating cylinder assigned to the actuating element first falls below the upper pressure value (and consequently the actuating element experiences a tensile force towards its locked position) and subsequently the hydraulic pressure within the locking cylinder associated with the locking element drops below the lower pressure value (and consequently the locking element experiences a tensile force towards its unlocked position).
- This ensures reliable functioning of the parking lock actuation system.
- the invention relates to a hydraulic parking lock actuation system in which a Normally-P functionality is fulfilled, i.e. the parking lock is automatically activated in the event of a power failure, in which a transport mode in which the parking lock / parking lock mechanism is independent of the power supply and the hydraulic supply ie, in particular, de-energized and depressurized, can be kept deactivated, is realized, and which can be adjusted via a simple control valve.
- the invention relates to a parking lock actuation system with a blocking element/locking element that has a first degree of freedom for a normally-P function to automatically engage a parking lock in the event of a power failure, and a second degree of freedom for a transport mode or a limp-home function to de-energize the parking lock and to be able to keep it open without pressure.
- the locking member is latched by a ballpoint pen refill mechanism so that it remains in a stable position against the disengagement force of a spring member.
- the invention also relates to a method for operating a parking lock actuation system for a motor vehicle, the parking lock actuation system having an unpressurized basic position ("unpressurized I"), in which the parking lock is active, has the parking lock actuation system being switched from the basic position to a first intermediate position ("between normal and transport lanes", low pressure) when the pressure is increased above a first pressure threshold, the parking lock actuation system being switched from the first intermediate position to a driving position (“Open parking position I”, full pressure), in which the parking lock is inactive, is switched when the pressure exceeds a second pressure threshold which is at a higher pressure value than the first pressure threshold, with the parking lock actuation system moving from the first intermediate position into a transport position (“unpressurized II”) ge is switched when the pressure is lowered below the first pressure threshold, wherein the parking lock actuation system is switched from the transport position to a second intermediate position ("open parking position II", full pressure),
- the parking lock actuation system can thus be operated in a normal mode (basic position-first intermediate position-driving position) or switched over to a transport mode (basic position-first intermediate position-transport position-second intermediate position-locked position). In the transport mode, it is possible to keep the parking lock actuation system locked in the detent position without pressure and current.
- the parking lock actuation system can be switched from the detent position to a third intermediate position (“between transport and normal lane”, full pressure) when the pressure is increased above the second pressure threshold, and switched from the third intermediate position to the basic position. when the pressure is lowered below the first pressure threshold.
- the locked position can thus be released and the parking lock actuation system can be reset from its transport mode to its normal mode.
- the parking lock actuation system can be switched from the driving position to the basic position when the pressure is lowered below the first pressure threshold.
- a normally P mode is thus implemented without having to go through the transport mode.
- FIG. 1 is a longitudinal sectional view of a parking lock actuation system
- Figs. 2a to 13b Schematic representations of different positions of the parking lock actuation system and associated positions of a locking mechanism.
- FIG. 1 shows a longitudinal sectional view of a described parking lock actuation system 1 for a motor vehicle.
- the functioning of the parking lock actuation system 1 is based on the schematic representations of Figs. 2a to 13b explained in more detail.
- the parking lock actuation system 1 has an actuation element 2 .
- the actuating element 2 of the parking lock actuation system 1 is directly connected to the (mechanical) Adjusting a parking lock 3 used.
- the actuating element 2 can be coupled or is coupled to the parking lock 3 .
- the actuating element 2 can be displaced between a locked position and an unlocked position.
- the parking lock 3 is active in the locked position. In the unlocked position, the parking lock 3 is inactive.
- the parking lock actuation system 1 has a locking element 4 .
- the locking element 4 can be coupled or is coupled to the actuating element 2 .
- the locking element 4 can be displaced between a locking position and an unlocking position.
- the locking position the locking element 4 fixes the actuating element 2 in a form-fitting manner in its unlocked position. I.e. the blocking of the actuating element 2 is active, so that the actuating element 2 cannot be moved (back) into its unlocked position.
- the locking of the actuating element 2 is inactive/not active, so that the actuating element 2 can be moved between its locked position and its unlocked position.
- the actuating element 2 is operatively connected/coupled to a hydraulic actuating cylinder 5 and can be displaced thereby.
- the locking element 4 is operatively connected/coupled to a hydraulic locking cylinder 6 and can be displaced thereby.
- the actuating cylinder 5 and the locking cylinder 6 are each connected to a common hydraulic medium supply line 7 on the side of their pressure chamber. This means that the actuating cylinder 5 is coupled to a hydraulic unit via the same hydraulic medium supply line 7 as the locking cylinder 6 , so that a pressure chamber of the actuating cylinder 5 always has the same hydraulic pressure as a pressure chamber of the locking cylinder 6 .
- the actuating element 2 can be longitudinally displaceable along its axial direction.
- the actuating element 2 can be displaceable against the restoring force/release force/spring force of a first spring element/an actuating spring 8 .
- the actuating element 2 can be biased into its locked position by the actuating spring 8 .
- the actuating cylinder 5 is subjected to a hydraulic pressure above an upper pressure value, the actuating element 2 is pressed/displaced from its locked position against the spring force of the actuating spring 8 into its unlocked position.
- the locking element 4 can Be longitudinally displaceable (to adjust between its unlocked position and its locked position) along its axial direction.
- the locking element 4 can be displaceable against the restoring force/release force/spring force of a second spring element/a locking spring 9 .
- the locking element 4 can be biased into its unlocked position by the locking spring 9 .
- the locking spring 9 has a first individual spring 9a and a second individual spring 9b.
- the first individual spring 9a is arranged in such a way that it counteracts a displacement of the locking element 4 below the lower pressure value.
- the second individual spring 9b is arranged in such a way that it counteracts a displacement of the locking element 4 above the lower pressure value.
- the first individual spring 9a has a lower spring constant than the second individual spring 9b.
- the actuating cylinder 5 and the locking cylinder 6 are each matched to one another in such a way (e.g. by dimensioning the pressure chambers and/or by dimensioning the actuating spring 8 and the locking spring 9) that the locking element 4 starts from a lower/lower pressure value present in the hydraulic fluid supply line 7. is displaced from a first pressure threshold and the actuating element 2 is displaced from a higher/upper pressure value present in the hydraulic medium supply line 7, which is higher than the lower pressure value,/from a second pressure threshold.
- the actuating cylinder 5 and the locking cylinder 6 are thus matched to one another in such a way that the actuating element 2 is only displaced when the second pressure threshold in the hydraulic fluid supply line 7 is exceeded, at which point the locking element 4 is preferably already pressed against the actuating element 2 .
- the actuating cylinder 5 and the locking cylinder 6 are matched to one another in such a way that when the pressure within the hydraulic fluid supply line 7 is reduced, starting from a pressure above the second pressure threshold, the hydraulic pressure within Half of the actuating cylinder 5 drops below the second pressure threshold and then the hydraulic pressure within the locking cylinder 6 drops below the first pressure threshold.
- the locking element 4 can be displaced, in particular rotated, between a locking position/locking preparation position and a loose position.
- a release of the locking element 4 from its locking position is positively blocked, i.e. the locking element 4 is positively fixed / ver stet / rusted in its locking position.
- the locking element 4 remains in a stable position, in particular against the release force/return force of the locking spring 9 .
- the loose position the locking element 4 can be moved/displaced (freely) between its locking position and its unlocking position.
- the locking element 4 can be rotated about its longitudinal axis (for adjustment between the locking position and the loose position). In other words, the locking element has a first degree of freedom for adjustment between its unlocked position and its locking position and a second degree of freedom for adjustment between its locked position and its loose position.
- the actuating element 2 In normal driving operation of the motor vehicle, the actuating element 2 is held in its unlocked position by a holding magnet 10, which also serves as a stop.
- a holding magnet 10 which also serves as a stop.
- the hydraulic pressure at the actuating cylinder 5 can be reduced below the upper pressure value or the actuating cylinder 5 can be depressurized.
- the parking lock actuation system 1 has a latching mechanism for positively locking the locking element 4 in its locking position.
- the locking mechanism can be designed in the manner of an adjustment mechanism of a ballpoint pen refill.
- the locking mechanism has a locking element 11 and a guide link 12 .
- the latching element 11 is firmly coupled to the locking element 4 .
- the guide link 12 is firmly coupled to the locking cylinder 6 .
- the latching element 11 and the guide link 12 have corresponding inclined surfaces which interact with one another in such a way that the latching element 11 is axia- ler displacement of the locking element 11 is rotated relative to the guide link 12 along the inclined surfaces.
- a force in the axial direction thus creates a torque, ie a rotation around the longitudinal axis of the locking element 4.
- the locking element 4 is implemented as a pin and can be displaced transversely to the actuating element 2 . At its end 13 facing the actuating element 2 , the locking element 4 can be brought into positive engagement with the actuating element 2 , in particular with a recess serving as a positive-locking element 14 .
- a basic position of the de-energized and depressurized parking lock actuation system 1 is shown.
- the hydraulic pressure is below the first pressure threshold, so that the spring force of the actuating spring 8 holds the actuating element 2 in its locked position/the actuating element 2 is retracted and the spring force of the locking spring 9 holds the locking element 4 in its unlocked position/the locking element 4 is retracted.
- Parking lock 3 is active.
- Fig. 2b a corresponding basic position of the locking mechanism is shown.
- the locking element 11 is located in a normal aisle 15 of the guide link 12.
- a first intermediate position of the currentless parking lock actuation system 1 is shown.
- the hydraulic pressure is above the first pressure threshold but below the second pressure threshold, so that the spring force of the actuating spring 8 keeps the actuating element 2 in its locked position and the locking element 4 is extended against the spring force of the locking spring 9, in particular the first individual spring 9a. until the end 13 rests against the actuating element 2 (or an outer contour of the actuating element 2).
- Parking lock 3 is active.
- the locking element 4 is in its central position because the contact of the locking element 4 with the actuating element 2 and/or the spring force of the second individual spring 9b prevents it from engaging in the form-fitting element 14 and the locking element cannot be fully extended into its locking position.
- a corresponding first intermediate position of the locking mechanism is shown in FIG. 3b.
- FIG. 4a A driving position of the parking lock actuation system 1 is shown in FIG. 4a.
- the hydraulic pressure is above the second pressure threshold, so that the actuating element 2 is extended against the spring force of the actuating spring 8 and pressed into its unlocked position.
- Parking lock 3 is inactive. Since the actuating element 2 is now in its unlocked position and the pressure is above the second pressure threshold, the locking element 4 can be extended further against the spring force of the locking spring 9, in particular the second individual spring 9b, engage in the positive-locking element 14 and assume its locking position .
- the holding magnet 10 is energized and holds the actuating element 2 in its unlocked position.
- a corresponding driving position of the locking mechanism is shown in FIG. 4b.
- the locking element 11 By increasing the pressure above the second pressure threshold (and the associated axial displacement), the locking element 11 (starting from the first intermediate position) was rotated / rotated back by a second inclined surface 17 of the guide link 12 in a second direction of rotation (opposite to the first direction of rotation).
- FIGS. 5a and 6a A position of the energized parking lock actuation system 1 is shown in FIGS. 5a and 6a.
- the hydraulic pressure is below the second pressure threshold, but the holding magnet 10 is energized, so that the actuating element 2 is held by the holding magnet 10 in its unlocked position.
- Parking lock 3 is inactive.
- the locking element 4 is retracted by the spring force of the second individual spring 9b (see FIG. 5a) and by the spring force of the first individual spring 9a (see FIG. 6a).
- FIGS. 5b and 6b A corresponding position of the locking mechanism is shown in FIGS. 5b and 6b.
- Fig. 7a the first intermediate position of the currentless parking lock actuation system 1 is shown again.
- the hydraulic pressure is above the first pressure threshold, but below the second pressure threshold, so that the spring force of the actuating spring 8 continues to hold the actuating element 2 in its locked position and the locking element 4 is extended against the spring force of the locking spring 9, in particular the first individual spring 9a, until the end 13 rests against the actuating element 2 .
- Parking lock 3 is active.
- the locking element 4 is in its central position because the contact of the locking element 4 with the actuating element 2 and/or the spring force of the second individual spring 9b prevents it from engaging in the form-fitting element 14 and the locking element cannot be fully extended into its locking position.
- Fig. 3b the corresponding first intermediate position of the locking mechanism is shown. By increasing the pressure above the first pressure threshold, the locking element 11 (starting from the basic position) was rotated by the first inclined surface 16 of the guide link 12 in the first direction of rotation.
- FIG. 8a a transport position of the de-energized and depressurized parking lock actuation system 1 is shown.
- the hydraulic pressure is below the first pressure threshold, so that the spring force of the actuating spring 8 holds the actuating element 2 in its locked position and the spring force of the locking spring 9 holds the locking element 4 in its unlocked position.
- Parking lock 3 is active.
- a corresponding transport position of the locking mechanism is shown in FIG. 8b.
- the latching element 11 is located in a transport aisle 18 of the guide slot 12. By lowering the pressure below the first pressure threshold, the latching element 11 (starting from the first intermediate position) was rotated by a third inclined surface 19 of the guide slot 12 in the first direction of rotation.
- FIGS. 9a and 10a A second intermediate position of the parking lock actuation system 1 is shown in FIGS. 9a and 10a.
- the hydraulic pressure is first increased above the first pressure threshold (cf. Fig. 9a), so that the spring force of the actuating spring 8 initially keeps the actuating element 2 in its locked position and the locking element 4 against the spring force of the locking spring 9, in particular the first individual spring 9a , is extended until the end 13 is in contact with the actuating element 2, but cannot be fully extended into its locking position, since the locking element 4 being in contact with the actuating element 2 and/or the spring force of the second individual spring 9b prevents it from engaging in the form-fitting element 14. Then the hydraulic pressure is increased above the second pressure threshold (see FIG.
- FIGS. 9b and 10b A corresponding second intermediate position of the locking mechanism is shown in FIGS. 9b and 10b.
- a detent position of the de-energized and depressurized parking lock actuation system 1 is shown.
- the hydraulic pressure is below the first pressure threshold, but the actuating element 2 is held in its unlocked position by the locking element 4 and the locking element 4 is held in its locked position by the engaged latching element 11, since the latching element 4 cannot oppose the spring force due to the activated latching mechanism of the locking spring 9, in particular the first individual spring 9a, move back out of its locking position.
- Parking lock 3 remains inactive.
- a corresponding latching position of the latching mechanism is shown in FIG. 11b.
- the locking element 11 By lowering the pressure below the second pressure threshold, the locking element 11 (starting from the second intermediate position) was rotated by a fifth inclined surface 21 of the guide link 12 in the first direction of rotation. Due to the geometry of the guide slot 12, the latching element 11 remains mechanically arrested in the latching position holding the locking element 4 in its latched position, even in the pressureless state.
- FIG. 12a A third intermediate position of the currentless parking lock actuation system 1 is shown in FIG. 12a.
- the hydraulic pressure is above the second pressure threshold, so that the actuating element 2 is extended against the spring force of the actuating spring 8 and pressed into its unlocked position. Parking lock 3 is inactive. Because the actuating element 2 is now in its unlocked position and the pressure is above the second pressure threshold, the locking element 4 can be extended further against the spring force of the locking spring 9, in particular the second individual spring 9b, and engage in the form-fitting element 14 and its assume locking position.
- Fig. 4b a corresponding third intermediate position of the locking mechanism is shown.
- Fig. 13a the basic position of the currentless and pressureless parking lock actuation system 1 is shown.
- the hydraulic pressure is below the first pressure threshold, so that the spring force of the actuating spring 8 holds the actuating element 2 in its locked position and the spring force of the locking spring 9 holds the locking element 4 in its unlocked position.
- Parking lock 3 is active.
- Fig. 13b the corresponding basic position of the locking mechanism is shown.
- the locking mechanism or the parking lock actuation system 1 is designed in such a way that it is switched into the basic position from any position/position by applying pressure twice above the second pressure threshold.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020120622.4A DE102020120622B4 (en) | 2020-08-05 | 2020-08-05 | Method for resetting a parking lock actuation system and a parking lock actuation system |
PCT/DE2021/100572 WO2022028641A1 (en) | 2020-08-05 | 2021-07-05 | Method for resetting a parking lock operating system and parking lock operating system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4193079A1 true EP4193079A1 (en) | 2023-06-14 |
Family
ID=76958666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21742695.6A Withdrawn EP4193079A1 (en) | 2020-08-05 | 2021-07-05 | Method for resetting a parking lock operating system and parking lock operating system |
Country Status (6)
Country | Link |
---|---|
US (1) | US11953094B2 (en) |
EP (1) | EP4193079A1 (en) |
KR (1) | KR20230005976A (en) |
CN (1) | CN115769007A (en) |
DE (1) | DE102020120622B4 (en) |
WO (1) | WO2022028641A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020126523B4 (en) | 2020-10-09 | 2022-12-01 | Schaeffler Technologies AG & Co. KG | Parking lock actuation system and method for operating a parking lock actuation system |
DE102021124454B4 (en) | 2021-09-22 | 2023-08-10 | Schaeffler Technologies AG & Co. KG | Hydraulic system and method of operating a hydraulic system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3205863A (en) | 1953-12-29 | 1965-09-14 | Parker Pen Co | Writing instrument |
DE4127991C2 (en) | 1991-08-23 | 1997-07-03 | Zahnradfabrik Friedrichshafen | Parking lock for automatic transmissions of motor vehicles |
WO2009047520A2 (en) | 2007-10-09 | 2009-04-16 | Ricardo Uk Ltd. | Improvements in park brakes of vehicles |
DE102011105068A1 (en) * | 2011-06-21 | 2012-07-05 | Daimler Ag | Vehicle parking lock device with at least one locking element |
DE102015214037B4 (en) * | 2015-07-24 | 2022-08-04 | Bayerische Motoren Werke Aktiengesellschaft | parking lock |
DE102016101486A1 (en) | 2016-01-28 | 2017-08-03 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Parking lock arrangement |
JP2019056408A (en) * | 2017-09-20 | 2019-04-11 | 株式会社Subaru | Shift control device |
DE102018203166A1 (en) * | 2018-03-02 | 2019-09-05 | Zf Friedrichshafen Ag | Parking lock in a transmission of a motor vehicle |
JP6725615B2 (en) * | 2018-09-21 | 2020-07-22 | 株式会社Subaru | Parking lock device |
CN110425278B (en) | 2019-08-27 | 2020-09-25 | 宁波上中下自动变速器有限公司 | Hydraulic parking execution assembly and transmission |
CN110588610B (en) * | 2019-10-08 | 2020-08-28 | 宁波上中下自动变速器有限公司 | Parking braking system and vehicle |
DE102020120621B4 (en) | 2020-08-05 | 2022-05-19 | Schaeffler Technologies AG & Co. KG | Parking lock actuation system and method for operating a parking lock actuation system |
-
2020
- 2020-08-05 DE DE102020120622.4A patent/DE102020120622B4/en active Active
-
2021
- 2021-07-05 KR KR1020227042246A patent/KR20230005976A/en unknown
- 2021-07-05 US US18/018,307 patent/US11953094B2/en active Active
- 2021-07-05 CN CN202180044221.7A patent/CN115769007A/en active Pending
- 2021-07-05 WO PCT/DE2021/100572 patent/WO2022028641A1/en active Application Filing
- 2021-07-05 EP EP21742695.6A patent/EP4193079A1/en not_active Withdrawn
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US11953094B2 (en) | 2024-04-09 |
KR20230005976A (en) | 2023-01-10 |
US20230296172A1 (en) | 2023-09-21 |
DE102020120622B4 (en) | 2022-05-19 |
WO2022028641A1 (en) | 2022-02-10 |
DE102020120622A1 (en) | 2022-02-10 |
CN115769007A (en) | 2023-03-07 |
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