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
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/02—Selector apparatus
  • F16H59/0204—Selector apparatus for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic
• • 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
  • F16H2059/0295—Selector apparatus with mechanisms to return lever to neutral or datum position, e.g. by return springs
• • 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
  • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
  • F16H61/24—Providing feel, e.g. to enable selection
  • F16H2061/241—Actuators providing feel or simulating a shift gate, i.e. with active force generation for providing counter forces for feed back
• • 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
  • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
  • F16H61/26—Generation or transmission of movements for final actuating mechanisms
  • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
  • F16H61/32—Electric motors actuators or related electrical control means therefor
  • F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission

Definitions

• the present disclosure relates generally to a gearshift assembly, and more particularly to an override system for a gearshift assembly for a transmission of a vehicle.
• the present invention relates generally to a gearshift assembly for a transmission of a vehicle including a bi-stable shift lever which is pivotally mounted to a base for movement within an index track of the base in a select direction between a shifting gate for automatic mode (i.e., an automatic shifting gate or an automatic shifting lane) and a shifting gate for manual mode (i.e., a manual shifting gate or manual shifting lane) and for movement in a shifting direction perpendicular to the select direction within each of the shifting gates.
• a shifting gate for automatic mode i.e., an automatic shifting gate or an automatic shifting lane
• a shifting gate for manual mode i.e., a manual shifting gate or manual shifting lane
• the bi-stable shift lever When in the automatic mode, is pivotally movable by a user in a shifting direction within the index track from a first rest position to a secondary position to select one of a park condition (P), a reverse condition (R), a neutral condition (N), a drive condition (D), or if present a low drive condition (L), which allows a coupled controller sensing such pivotal movement to direct the transmission to select the respective corresponding appropriate gear from a parking gear, a reverse gear, a neutral gear, a drive gear, and a low gear.
• P park condition
• R reverse condition
• N neutral condition
• D drive condition
• L low drive condition
• the shift lever in the manual mode, is pivotally movable by a user in the select direction from a second rest position to a secondary position to select between the corresponding multiple drive conditions (M), which allows a coupled controller sensing such pivotal movement to direct the transmission to select between multiple manual drive gears (such as four manual drive gears).
• the bi-stable shifter lever is also configured to automatically return to the respective first rest position in the automatic mode, or second rest position in the manual mode, in the absence of user force applied in the selection direction, while maintaining the shift lever in the respective selected condition in the automatic or manual mode.
• Such gearshift assemblies also typically include a blocking element, which blocks the movement of the bi-stable shift lever within the automatic shifting gate from the first rest position to the secondary position unless actuated, with such actuation typically occurring where a user depresses the brake pedal.
• the movement of the blocking element after actuation, to allow the shift lever to move in the select direction of the automatic shifting gate from the first rest position to the secondary position, results in the generation of sound associated with the movement of the blocking element. Such sound can be incorrectly perceived by the driver of the vehicle as being abnormal or a cause for concern.
• the use of the blocking element in such gearshift assemblies typically functions to prevent the selection movement of the bi-stable shift lever from the first rest position in the automatic mode to the second rest position in the manual mode unless the selected condition in the automatic mode is in the drive condition, in which the blocking element is moved to allow the selection movement to the manual shifting gate.
• the removal of this blocking element would thus eliminate the associated control of the movement of the bi-shift lever from the first rest position in the automatic mode to the second rest position in the manual mode unless the selected condition in the automatic mode is in the drive condition.
• an object of the present invention to provide an override system for controlling the selection movement of the bi-stable shift lever from the first rest position in the automatic mode to the second rest position unless the selected condition in the automatic mode is in the drive condition without the use of a blocking element.
• the present disclosure is directed to an override system for a gearshift assembly or a transmission of a vehicle having a bi-stable shifting lever moveable in an automatic shifting gate and a manual shifting gate.
• the gearshift assembly includes a base having an index track including an automatic shifting gate and a manual shifting gate and a selection gate extending between the automatic shifting gate and the manual shifting gate.
• the gearshift assembly also includes a bi-stable shift lever pivotally mounted to the base and moveable within the index track across the selection gate between a first rest position within the automatic shifting gate and a second rest position within the manual shifting gate.
• the shift lever is moveable within the automatic shifting gate to select at least one of a park, reverse, and neutral condition to define a first state of the system, and is also moveable within the automatic shifting gate to select a drive condition to define a second state of the system.
• the override system for the gearshift assembly includes a return mechanism coupled to the bi-stable shift lever, and an electric motor coupled to the return mechanism.
• the override system for the gearshift assembly includes a controller coupled to the electric motor and to the shift lever to operate the return mechanism and mechanically move the shift lever from the second rest position within the manual shifting gate to the first rest position within the automatic shifting gate when the system is in the first state.
• the present disclosure thus eliminates sound associated with the actuation and movement of the blocking element in gearshift assemblies including this feature.
• the override system provided herein allows the user or operator to operate the vehicle in the manual mode when the shift lever has been moved to the second rest position from the first rest position when the system is in the second state.
• Figure 1A is a perspective view of an override system for a gearshift assembly including a return mechanism with the shift lever in the automatic shifting gate and with the override system in the first state;
• Figure IB is a perspective view of an override system for a gearshift assembly including a return mechanism with the shift lever in the manual shifting gate and with the override system in the second state;
• Figure 2 is a partially exploded view of the gearshift assembly and index track of the override system of Figures 1A and IB;
• Figure 3 is a perspective view of the index track of Figures 1A, IB and 2;
• Figures 4 and 5 show perspective views of parts of the return mechanism of the override system of Figures 1A and IB;
• Figures 6 to 8 show subsequent movements in which the return mechanism of the gearshift assembly performs a return operation of the shift lever from the manual shifting gate to the automatic shifting gate through the selection gate while the override system is in the first state.
• the present invention is directed to an override system 17 for a gearshift assembly 16 of a transmission for a vehicle 18.
• the vehicle 18 also includes a controller 19 coupled to the override system 17 and to the gearshift assembly 16 to control the operation of the vehicle 18.
• the gearshift assembly 16 as best shown in Figure 1 and 2, includes a base 20 having an index track 21.
• the gearshift assembly 16 also includes a bi-stable shift lever 30 electrically coupled to the controller 19 and pivotally mounted to the base 20 within the index track 21.
• the bi-stable shift lever 30 is pivotally moveable by the user within the index track 21 across the selection gate 24 in a selection direction between the automatic shifting gate 22 (see Figure 1A in which the shift lever is in the automatic shifting gate 22), corresponding to an automatic mode, and the manual shifting gate 23 (see Figure IB in which the shift lever is in the manual shifting gate 23), corresponding to a manual mode.
• the bi-stable shift lever 30 is also pivotally moveable by the user along the automatic shifting gate 22 in a shifting direction transverse to the selection direction, from a first rest position 53 to a forward position 53A in a forward direction, or from the first rest position 53 in a rearward direction opposition the forward direction to a rearward position 53B (see Figure 3B for a schematic representation of the first rest position 53, forward position 53A, and rearward positon 53B), to select at least one of a park (P), reverse (R), neutral (N), drive (D) and low drive (L) condition (if present).
• P park
• R reverse
• N neutral
• D drive
• L low drive
• the bi-stable shift lever 30 is also pivotally moveable by the user along the manual shifting gate 23 in a shifting direction transverse to the selection direction, from a second rest position 55 in a forward direction to a forward position 55A, or in a rearward opposite the forward direction to the rearward position 55B (see Figure 3B for a schematic representation of the second rest position 55, forward position 55A, and rearward positon 55B) to select between one or more manual drive conditions M (shown as M1-M4 in Figure 3B, representing four manual drive conditions (Ml, M2, M3 and M4), and corresponding to the number of forward manual selectable gears in the transmission).
• M1-M4 in Figure 3B, representing four manual drive conditions (Ml, M2, M3 and M4)
• the number of manual drive conditions M corresponding to the number of forward manual selectable gears in the transmission of the vehicle 18, may vary between as little as two or as many as ten or more manual drive conditions, such as four or six or eight manual drive conditions.
• the override system 17 for the gearshift assembly 16 further includes a return mechanism 51 coupled to the controller 19 that is configured to mechanically drive the shift lever 30 back to the first rest position 53 in the automatic shifting gate 22 from the second rest position 55 in the manual shifting gate 23 when the shift lever 30 has been placed in the manual shifting gate 23 by the user while the override system 17 is in a second state, as will be explained in further detail in Figures 6-8 below.
• the shift lever 30, here a plunger-type shift lever 30, includes a base portion 31 and an opposing selection portion 32 defining a length therebetween.
• the base portion 31 is in the form of a shaft that defines a length between a distal end 33 and a proximal end 34, with the proximal end 34 disposed within an inner cavity portion 35 of the selection portion 32.
• a sleeve 36 is fixed to the base portion 31 between the distal end 33 and proximal end 34.
• a spring 37 is coupled around the shaft of the base portion 31 and is partially disposed between the sleeve 36 and an end surface 38 of the selection portion 32.
• the spring 37 is configured to continually bias the base portion 32 of the shift lever 30 against an inner surface 40 of the index track 21 of the base 20.
• a selection member shown as a push button 39, is coupled to the selection portion 32 of the shift lever 30 and is also electrically coupled to the controller 19.
• the spring 37 applies force to the sleeve 36 to bias the base portion 31 of the shift lever 30 against an inner surface 43 of a first detent valley 42 of the automatic shifting gate 22.
• the spring 37 applies force to the sleeve 36 to bias the base portion 31 of the shift lever 30 against an inner surface 45 of a second detent valley 44 of the manual shifting gate 23.
• the spring 37 applies force to the sleeve 36 to bias the base portion 31 of the shift lever 30 against a raised inner surface 50 of the selection gate 24, corresponding to a crest between the first and second inner surfaces 43, 45 of the first and second detent valley 42, 44.
• the shift lever 30 When the shift lever 30 is positioned within the automatic shifting gate 22, and due to the curved nature of the inner surface 43 of the first detent valley 42, the shift lever 30 is normally positioned in the first rest position 53 with the base portion 31 biased against the lowermost and centrally located valley portion 46 of the inner surface 43 in an upright position such that the length of the shift lever 30 is generally aligned with the length of the selection gate 24.
• the shift lever 30 can be pivotally moved by the user within the automatic shifting gate 22 in the shift direction transverse to the selection direction to the forward position 53 A or rearward position 53B, wherein the base portion 31 slides along, and remains biased against, an upwardly curving portion 47 of the inner surface 43 offset forward or rearward relative to the centrally located valley portion 46.
• the pivotal movement is interpreted by the controller 19 to select at least one of a park (P), reverse (R), neutral (N), drive (D) and low drive (L) condition (if present) defining the first state or second state of the override system 17.
• the first state of the override system 17, as determined by the controller 19, is defined wherein the shift lever 30 has been positioned in the automatic shifting gate 22 and has selected one of the park (P), reverse (R), neutral (N), or low drive (L) (if present) conditions. Stated another way, the selection of one of the park (P), reverse (R), neutral (N), or low drive (L) (if present) conditions (see Figure 3B) defines the first state of the override system 17.
• the second state of the override system 17, as determined by the controller 19, is defined wherein the shift lever 30 has been positioned in the automatic shifting gate 22 and has selected the drive (D) condition. Stated another way, the selection of the drive (D) condition defines the second state of the override system 17
• the controller 19 is configured to sense and interpret the manual pivotal movement of the shift lever 30 in the automatic shifting gate 22 by the user from the first rest position 53 in the shifting direction forward to the forward position 53A, or rearward to the rearward position 53B, to alter the selection of one of the park (P), reverse (R), neutral (N), drive (D) and low drive (L) conditions to another different one of the park (P), reverse (R), neutral (N), drive (D) and low drive (L) conditions.
• the shift lever 30 Upon releasing the shift lever 30, and owing to the curved nature of the inner surface 43, the shift lever 30 is automatically returned to the first rest position 53 from either the forward position 53A or rearward position 53B while maintaining the newly selected operating condition (i.e., the newly selected one of the park (P), reverse (R), neutral (N), drive (D) or low drive (L) condition).
• the controller 19 thus confirms, based upon the newly selected operating condition, whether the override system 17 is in the first state or the second state.
• the user may pivot the shift lever 30 rearward once from the first rest position 53 to the rearward position 53B to select the reverse (R) condition, whereby the controller 19 senses the single pivoting movement to the rearward position 53B of the shift lever 30 and directs the gearshift assembly 16 to shift the transmission from the parking gear (corresponding to the park (P) condition) to the rearward gear (corresponding to the rear (R) condition while remaining in the first state), thereby allowing the user to operate the vehicle 18 to move (i.e., be driven) in a rearward direction.
• the user may pivot the shift lever 30 forward twice from the first rest position 53 to the forward position 53A to select the drive (D) condition, whereby the controller 19 senses the pivoting forward twice of the shift lever 30 and directs the gearshift assembly 16 to shift the transmission from the parking gear (corresponding to the park (P) condition) optionally through the neutral gear (corresponding to the (N) position) to the drive gear (corresponding to the drive (D) condition while moving from the first state to the second state), thereby allowing the user to operate the vehicle 18 to move (i.e., be driven) in a forward direction.
• the gearshift assembly 16 includes one or more automatic gate position sensors 85, which are each respectively coupled to the controller 19, and which are configured to sense the relative positioning of the shift lever 30 within the automatic shifting gate 22 (i.e., in the first rest position 53, forward position 53A, or rearward position 53B) and generate a signal corresponding to the relative positioning of the shift lever 30 that is received by the controller 19.
• the controller 19 is configured to interpret the received signal from the sensor(s) 85 to confirm that the shift lever 30 is in the first state or the second state and to also confirm the selection of the shift lever 30 in the newly selected one of the park (P), reverse (R), neutral (N), drive (D) or low drive (L) condition.
• the sensors 85 are configured to generate a distinct signal that follows the movement of the shift lever 30 in the automatic shifting gate 22 corresponding to first rest position 53, forward position 53A, and rearward position 53B.
• the controller 19 interprets each distinct signal to determine a desired user selection the newly selected one of the park (P), reverse (R), neutral (N), drive (D) or low drive (L) condition, and further determines whether the shift lever 30 is in the first state or the second state based upon the newly selected one condition.
• the shift lever 30 when the shift lever 30 is positioned within the manual shifting gate 23, and due to the curved nature of the inner surface 45 of the second detent valley 44, the shift lever 30 is normally positioned in the second rest position 55 with the base portion 31 biased against the lowermost and centrally located valley portion 49 of the inner surface 45 in an upright position such that the length of the shift lever 30 is generally aligned with the length of the selection gate 24.
• the shift lever 30 can be pivotally moved within the manual shifting gate 23 by the user in the shift direction transverse to the selection direction to the forward position 55A or to the rearward position 55B, wherein the base portion 31 is biased against a upwardly curving portion 48 of the inner surface 45, to select one of the manual drive positions M (shown as M1-M4 in Figure 3B).
• the manual shifting gate may include one or more sensors 85 which are each respectively coupled to the controller 19, and which are configured to sense the relative positioning of the shift lever 30 within the manual shifting gate 23 (i.e., in the second rest position 55, forward position 55A, or rearward position 55B) and generate a signal corresponding to the relative positioning of the shift lever 30 that is received by the controller 19.
• the controller 19 is configured to interpret the received signals from the sensors 85 in the manual shifting gate 30 to confirm whether the shift lever 30 has moved from the automatic shifting gate 22 to the manual shifting gate 23 while in the first state or the second state and to also confirm the selection of the shift lever 30 in the newly selected one of manual drive M conditions, such as a respective one of the Ml, M2, M3 or M4 manual drive conditions, when the shift lever 30 is in the second state and is moving in the shifting direction within the manual shifting gate 53.
• manual drive M conditions such as a respective one of the Ml, M2, M3 or M4 manual drive conditions
• the controller 19 determines, via the signal received by the sensors 85 that the shift lever 30 has been moved to the second rest position 55 in the manual shifting gate 23 from the first rest position 53 of the automatic shifting gate 22 while in the first state, the controller 19 initiates the return mechanism 51, described in further detail below, to mechanically drive the shift lever 30 back to the automatic shifting gate 22, and in particular back to the first rest position 53 in the automatic shifting gate 22 through the selection gate 24.
• the controller 19 therefore does not allow the user to operate the vehicle 18 in the manual mode if the controller 19 determines that the override system 17 is in the first state.
• the controller 19 determines, via the signal received by the sensors 85, that the shift lever 30 has been moved from the first rest position 53 in the automatic shifting gate 22 to the second rest position 55 in the manual shifting gate 23 while in the second state (i.e., wherein the shift lever 30 was in the drive (D) condition in the first rest position 53 in the automatic shifting gate 22 immediately prior to the pivoting movement of the control lever 30 in the selection direction by the user to the manual shifting gate 23), the controller 19 allows the user to operate the vehicle 18 within the manual shifting gate 23 in the manual mode to select one of the manual drive positions M (such as the Ml, M2, M3 or M4 drive conditions) to drive the vehicle 18 in the desired manual gear corresponding to the selected manual gear.
• the manual drive positions M such as the Ml, M2, M3 or M4 drive conditions
• the second state is only available, as noted above, wherein the user has pivoted the shift lever 30 from the first rest position 53 in the automatic shifting gate 22 in the selection direction to the second rest position 55 in the manual shifting gate 23 when the shift lever 30 was in the drive (D) condition, and hence in the second state. If the user has pivoted the shift lever 30 from the first rest position 53 in the automatic shifting gate 22 in the selection direction to the second rest position in the manual shifting gate 23 when the shift lever 30 was in the reverse (R), neutral (N), park (P) or low drive (L) condition, and hence in the first state, the controller 19 senses such movement through the sensors 85 and activates the return mechanism 51 to mechanically drive the shift lever 30 back to the automatic shifting gate 24, as will be explained further below.
• the return mechanism 51 includes an electric motor 52 which drives a shaft 54 for rotation.
• the shaft 54 carries a worm 56.
• the worm 56 meshes with a worm gear 58.
• Worm 56 and worm gear 58 are preferably arranged such that a high gear ratio is achieved which allows to employ a rather small electric motor 52. In this manner the worm gear 58 can be driven to rotate by the electric motor 52.
• a radial cam surface 68 and a helical cam surface 61 are formed on a front surface of the worm gear 58.
• the radial cam surface 68 forms a side surface next to the worm gear 58, which side surface has a varying radial distance to the rotational axis of the worm gear 58, i.e., the side surface of the radial cam surface 68 is along a certain portion of the circumference closer to the rotational axis of the worm gear 58 than in the remaining portion of the circumference, as can best be seen in Fig. 4.
• the function of the radial cam surface 68 will be described in more detail further below.
• the helical cam surface 61 is formed by the upper surface of a circular wall 62 which is coaxially surrounding the rotational axis of the worm gear 58.
• the helical cam surface 61 has a minimal height over the front surface of the worm gear 58 at a starting point. From the starting point in circumferential direction the height over the front surface of the worm gear 58 increases. Before reaching 360° in circumferential direction, the helical cam surface 61 has reached a maximal height over the front surface and then has a falling edge to return to the minimal height when the starting point is reached again.
• a hollow plunger 70 is disposed coaxially with the rotational axis of the worm gear 58, and can be displaced in the direction of the rotational axis of the worm gear 58, but is fixed against rotation around the rotational axis of the worm gear 58.
• the plunger 70 is partially received within the circular wall 62 which provides the helical cam surface 61 at its upper surface.
• the plunger 70 is furthermore provided with a radial projection 72 that extends radially beyond the circular wall 62. The surface of the radial projection 72 facing the helical cam surface 61 comes into abutment on the helical cam surface 61.
• a helical compression spring 90 is with one end received within the plunger 70 and is supported therein.
• the opposite end of the compression spring 90 supports a push member 60 which is facing a lower end portion of the shift lever, as can be seen in Figures 1A. IB, and 6-8.
• the push member 60 When the push member 60 reaches the base portion 31 of the shift lever 30, and the plunger 70 is further moved towards the shift lever 30 by further rotation of the helical cam surface 61 towards the maximal height of the helical cam surface 61 over the front surface of the worm gear 58, the push member 60 acts on the base portion 31 of the shift lever 30 to move it back towards the automatic shifting gate 22 in the selection direction through the selection gate 24.
• the shift lever 30 is in the manual shifting gate 22 in the second resting position 55 corresponding to the centrally located valley portion 49 of the inner surface 45 of the second detent valley 44 and is in the second state.
• the return operation has been started wherein the controller 19 (after confirming the override system 17 is in the second state and after confirming the positioning of the select lever 30 in the manual shifting gate 23) activates the electric motor 52 of the return mechanism 51, which causes rotation of the worm gear 58, which in turn causes a rotation of the helical cam surface 61 which rotates relatively to the radial projection 72 of plunger 70 such that the helical cam surface 61 which is in abutment with the radial projection 72 of the plunger 70 increase in height over the front surface of the worm gear 58.
• plunger 70 This causes plunger 70 to be pushed towards the shift lever 30, together with spring 90 and push member 60 (leftward as shown in Figure 6) until push member 60 comes into abutment with the surface of the shift lever 30.
• the force of the preloaded compression spring 90 on the push member 60 is sufficient to move push member 60 such that shift lever 30 begins rotation and is pushed toward the selection gate 24 (the rotation of the shift lever 30 is shown by arrow 93).
• the pushed movement of the shift lever 30 causes the base portion 31 to begin to travel along the inner surface 45 of the second detent valley 44 from the centrally located valley portion 49 of the inner surface 45 towards the raised inner surface 50 of the selection gate 24 as it rotates as shown by arrow 93, which causes the spring 37 to begin to compress between the end surface 38 of the selection portion 32 and the sleeve 36 to accommodate such movement.
• the continued operation of the electric motor 52 further rotates the worm gear 58 to increase the plunger 70 height and further push the push member 60 on the base portion 31 of the shift lever 30.
• the continued pushed movement of the shift lever 30 causes the base portion 31 to travel from the inner surface 45 of the second detent valley 44 and onto the raised inner surface 50 of the selection gate 24, which causes the spring 37 to begin further compress between the end surface 38 of the selection portion 32 and the sleeve 36 to accommodate such movement and to bias the base portion 31 against the raised inner surface 50.
• the shift lever 30 continues the rotational movement 93 during this operation.
• the spring 37 decompresses between the end surface 38 of the selection portion 32 and the sleeve 36 to accommodate such movement and to bias the base portion 31 against the inner surface 43 of the first detent valley 42, and eventually against the centrally located valley portion 46 of the inner surface 43 of the first detent valley 42.
• the worm gear 58 Upon completion of the return operation, the worm gear 58 has been rotated to a position in which the radial projection 72 of plunger 70 has passed the area of maximal height of the helical cam surface 61 and is disposed opposite to the starting position of the helical cam surface 61 again, i.e. the region of minimal height of the helical cam surface 61 above the front surface of the worm gear 58. In this position, the push member 60 and the plunger 70 are free again to be moved back (shown as rightward by arrow 99 in Figure 8).
• the return mechanism 51 can also be utilized by the user in conjunction with the selection member 39 to automatically return the shift lever 30 from the second rest position 55 in the manual shifting gate 23 to the first rest position 53 in the automatic shifting gate 24, when the override system 17 is in the second state without having to manually pivot the shift lever 30.
• the shift lever 30 when the shift lever 30 is in the manual selection gate 23 and in the second state (such as, for example, wherein the user is in first gear corresponding to the first manual drive position (Ml) and wherein the vehicle 18 is stopped or parked), the user moves the selection member 39 from a non-actuated position to an actuated position, such as by depressing the push button 39.
• the controller 19 senses the movement of the selection member 39 to the actuated position, and initiates the return operation with the return mechanism 51 in exactly the same manner as provided above in Figures 6 to 8.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Transmission Device (AREA)
• Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

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Publications (1)

Family

ID=67211767

Family Applications (1)

Country Status (2)

Family Cites Families (3)

• 2019
  • 2019-05-20 WO PCT/IB2019/054159 patent/WO2020234626A1/en unknown
  • 2019-05-20 EP EP19737212.1A patent/EP3973212A1/de not_active Withdrawn

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