Abstract: A parking lock device includes a parking lock wheel, a locking pawl moveable between a locked position and an unlocked position, and an operating piston displaceable along a displacement axis. A movement of the locking pawl between the locked position and the unlocked position can be effected. The parking lock device also includes a latch lever pivotable about a pivot axis, and a solenoid by means of which the latch lever can be pivoted from one position to the other position. The pivot axis runs perpendicularly to the displacement axis.

Abstract: The invention relates to parking brake device (10) for a vehicle transmission (GT) comprising a driveshaft (AW) and a first actuator (F1), via which the driveshaft (AW) can be rotated; a pawl (2), which can be lockingly engaged in the vehicle transmission (GT); a rotary mechanism (1), which is connected to the driveshaft (AW) and comprises an engaging mechanism, an insert spring (16) and a permanent magnet (PM), wherein the pawl (2) and the rotary mechanism (1) can be moved with the permanent magnet (PM) between a locking position (P) and a neutral position (nP) for the vehicle transmission (GT), wherein the rotary mechanism (1) can be pretensioned via the insert spring (16) and the neutral position (nP) can be adopted; wherein the parking brake device (10) also comprises: a second actuator (F2), via which the engaging mechanism can be triggered when the insert spring (16) is pretensioned and, as a result, the locking position (P) can be entered via an application of force of the insert spring (16) on the rot

Abstract: A park lock unit and method for operation of said unit are provided. In one example, the park lock unit includes a sliding assembly that engages and disengages a parking pawl from a toothed wheel and an electronic actuation assembly configured to engage the parking pawl with the toothed wheel when electric power provided to the electronic actuation assembly drops below a threshold value. The park lock unit further includes a manual release mechanism configured to disengage the parking pawl from the toothed wheel in response to operator input.

Abstract: Described is a transmission device (1) for an electrically driveable vehicle having a transmission element (2), a parking lock (6), by which the transmission element (2) can be blocked and which has a parking lock actuator (8), and a transmission housing (9), which encloses the transmission element (2) and the parking lock (6). A pressure equalization apparatus (14) is connected to an exterior of the transmission housing (9) in a gas-permeable manner. The pressure equalization apparatus (14) has a lead-through element (16) which passes through a transmission housing opening (15) and a fluid guiding element (17), the first end of which is connected to the interior of the parking lock actuator (8) and the second end of which is connected to the lead-through element (16).

Abstract: A lever (3) for the temporary disengagement of a parking lock (2) of a vehicle drive unit (1). The lever (3) comprises a fixing piece (31) for fitting the lever (3) onto a parking lock shaft (26), which extends inside the vehicle drive unit (1) and serves to actuate the parking lock (2). The lever (3) is a hand lever with a gripping handle (32). The gripping handle (32) is designed to enable a user to apply a manual force for manual actuation of the lever (3). When the lever (3) is fitted on the parking lock shaft (26) and moved, the parking lock shaft (26) is moved from an engagement position to a disengagement position. In the disengagement position, by further movement of the gripping handle (32) into a locking position, the lever (3) is blocked against a reverse movement out of the disengagement position.

Abstract: A shift device includes: a shift switching member including valley parts corresponding to a shift position; a positioning member provided to establish the shift position in a state of being fitted into any one of the valley parts; a motor including a rotor and a stator and driving the shift switching member; a speed reduction mechanism section rotating the shift switching member in a state in which a rotation speed transmitted from the motor is reduced; a rotor rotational angle sensor detecting a rotational angle of the rotor; and an output shaft rotational angle sensor detecting a rotational angle of the shift switching member. The shift device detects the number of rotations of the motor based on association between output values of the output shaft rotational angle sensor and the rotor rotational angle sensor.

Abstract: A shift device includes: a shift switching member including valley parts corresponding to a shift position; a positioning member provided to establish the shift position in a state of being fitted into any one of the valley parts; a motor including a rotor and a stator and driving the shift switching member; a speed reduction mechanism section rotating the shift switching member in a state in which a rotation speed transmitted from the motor is reduced; a rotor rotational angle sensor detecting a rotational angle of the rotor; and an output shaft rotational angle sensor detecting a rotational angle of the shift switching member A width of a backlash included in the speed reduction mechanism section is detected, and the rotational angle of the motor corresponding to the center of the backlash is acquired.

Abstract: A control device (10) for a parking brake device has an electronic device (12) by means of which, in the event of failure of a power supply system of a vehicle equipped with the control device (10) and the parking brake device during a procedure for parking the vehicle, at least one activation signal (14) can be output to a triggering device (16) of the parking brake device, so that the triggering device (16) can be activated by means of the at least one activation signal (14) and the parking brake device can be transferred to a locking mode by means of the activated triggering device (16), such that the vehicle is locked in its current parking position by means of the parking brake device present in its locking mode.

Abstract: A parking lock includes a locking pawl (2) and an interlocking element (6) arranged on a connecting bar (5) to a selector lever (4). During engagement of the parking lock, the selector lever (4) is rotated by a spring (9). A hydraulically actuatable actuator (10) including two pistons (11, 12). A first piston (11) is pressurized in order to disengage the parking lock and axially displace the second piston (12) against a spring (9). Axial movement of the second piston (12) rotates the selector lever (4) and vice versa. A detent device (13) of the actuator (10), is actuatable by an electromagnet (13a). An emergency release device (15) is operatively connectable with the selector lever (4) so that the second piston (12) is axially displaceable by the selector lever (4) without displacing the first piston (11).

Abstract: A securing device for securing an electric vehicle in a stationary position. The securing device having a transmission locking device and an axle locking device. The transmission locking device has a transmission locking drive with a transmission locking shaft for driving a transmission lock between a transmission locking position and a transmission release position. The axle locking device has an axle locking drive with an axle locking shaft for driving an axle lock between an axle locking position and an axle release position. The transmission locking shaft and the axle locking shaft are formed independently of one another.

Abstract: A vehicle includes: a floor panel; an under cover disposed below the floor panel in the vehicle; a parking lock mechanism, disposed between the floor panel and the under cover, switching, using an actuator, a locked state for constraining rotation of a wheel and an unlocked state for not constraining rotation of the wheel; and a parking lock manual releasing mechanism, disposed between the floor panel and the parking lock mechanism, switching, when the parking lock mechanism is in the locked state, the state of the parking lock mechanism to the unlocked state on a basis of manual operation of an operation portion. Further, the under cover includes a visual recognition hole for viewing the operation portion.

Abstract: A vehicle shift-by-wire device includes: a casing in which the shift actuator is disposed; a coupling member; and a connecting/disconnecting member disposed in the casing movably in the shifting direction and movably in a connecting/disconnecting direction crossing the shifting direction, and moved in the shifting direction integrally with the coupling member, wherein when the connecting/disconnecting member is held at an electrically shifting position in the connecting/disconnecting direction, the connecting/disconnecting member is coupled to the shift actuator and is moved in the shifting direction by the shift actuator to switch the shift corresponding position of the shift position switching mechanism via the coupling member, and wherein when the connecting/disconnecting member is moved to a manually shifting position in the connecting/disconnecting direction, the connecting/disconnecting member coupled to the shift actuator is disconnected so that the shift actuator is disabled to switch the shift corres

Abstract: In one aspect of the invention there is provided a method of manually releasing power actuated vehicle park means in the absence of power, the method comprising the steps of: rotating a power actuated selector shaft from a park mode position in which one or more wheels are locked by the park means to a park release mode position in which the one or more wheels are released by the park means; and locking the selector shaft in the release mode position by means of locking means, whereby the successive steps of rotating the selector shaft to the release mode position and subsequently locking the selector shaft in the release mode position comprise manual translation or rotation of one or more members in first and second directions respectively, the first direction being different from the second direction.

Abstract: The present disclosure relates to a vehicle having a braking system and a method of engaging the braking system. The braking system engages a brake mechanism as a waiting brake. The vehicle has a dual function device which is configured such that when the dual function device is activated when the vehicle transmission system is in a drive mode, the transmission system is maintained in that drive mode, and when the dual function device is activated when the transmission system is in the neutral mode, the brake mechanism is engaged.

Abstract: Some embodiments are directed to a vehicular transmission actuator. A release shaft is operatively coupled to a gear, and is actuable between a first position in which the gear is engaged, and a second position in which the gear is disengaged. The release shaft extends through an opening of a transmission case so as to define an exterior portion that projects beyond the exterior surface of the transmission case. A protuberance is disposed at the exterior surface of the transmission case adjacent the opening. A bracket is operatively connectable to the exterior portion of the release shaft to enable manual actuation of the release shaft from the first position to the second position. The bracket is configured to cooperate with the protuberance to automatically hold the release shaft in the second position subsequent to manual actuation of the release shaft from the first position to the second position.

Abstract: A hinge pillar assembly includes a hinge pillar including a panel. The panel including a body side outer door shut face and a defining an inner cavity and an access opening in communication with the inner cavity. The access opening is positioned in the body side outer door shut face and provides access to the manual park release actuator at least partially disposed in the inner cavity. The hinge pillar assembly further includes a cover removably coupled to the hinge pillar. The cover closes the access opening when coupled to the hinge pillar. The hinge pillar assembly further includes a manual park release actuator at least partially disposed in the inner cavity. The manual park release actuator is operatively coupled to a transmission and is configured to move relative to the hinge pillar to shift the transmission from a Park mode to an Out-of-Park mode.

Abstract: A parking lock arrangement for a motor vehicle transmission has a blocking arrangement actuatable between a release position and a blocking position. The blocking arrangement is designed to immobilise a motor vehicle in the blocking position. The parking lock arrangement has an arrangement for actuating the blocking arrangement. The actuating arrangement has a cam disc supported on a housing and driveable for rotation and has an actuating cam portion that extends over a first circumferential region of the cam disc that is greater than 5° and less than 180°. The actuating arrangement has a lever supported pivotably on the housing and coupled to the blocking arrangement. The lever is connected to a driving feature that is coupled to the cam disc, such that, when the cam disc is rotated, the driving feature is taken along by the actuating cam portion in such a way that the lever is pivoted in order to actuate the blocking arrangement.

Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed therein, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve, a locking unit disposed within the cylinder for locking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power and an emergency parking device which is connected to the locking unit and selectively forcibly moves the locking unit.

Abstract: A parking system for a hybrid vehicle includes a transmission housing, a first motor section provided in the transmission housing, and mounted on an input shaft, a second motor section provided at the rear of the first motor section, and mounted on the input shaft, and a parking mechanism provided between the first motor section and the second motor section for selectively restraining a drive gear spline-coupled to the second motor section. The parking system for a hybrid vehicle can be reduced in overall size by improving the layout of the parking mechanism within the transmission with two motors and forming the parking gear integrally with the drive gear.

Abstract: A parking lock control element having an actuator coupled to the parking lock pawl, and a retaining device which works with the actuator to secure the parking lock pawl in the disengaged position. The retaining device has a blocking slide connected to the actuator, and a blocking actuator having a slider gap, the width of the slider gap being modified in an actuating manner, wherein the blocking slide can move into the slider gap—when the slider gap is open—releasing the actuator. The connecting device reduces structural complexity and related costs. The control element is comparatively robust with respect to manufacturing tolerances, acceleration forces, vibrations, and temperature stress. With minimal auxiliary energy, high holding forces can be achieved to secure the parking lock pawl. An emergency unlocking actuation can also be integrated in a simple manner.

Abstract: Parking lock arrangement, having a parking lock mechanism, which can be moved between a parking lock position and a release position, and having an operating device which is supported so that it can rotate about a first axis and which is designed, through rotation, to operate the parking lock mechanism. The parking lock arrangement further has an actuating mechanism and a coupling device which couples the operating device to the actuating mechanism. The actuating mechanism is supported so that it can rotate about a second axis relative to a drum, which by means of a drive is rotatable about the second axis.

Abstract: A device (1) for actuating a parking lock comprises an emergency release mechanism. The device (1) for actuating the parking lock comprises an electric actuator (2) with an actuator output element (3) which is moveable in translation, and the actuator output element (3), when moved in a first direction, disengages the parking lock and when moved in an opposite second direction, engages the parking lock. The actuator output element (3) is connected to the parking lock by a clutch (6), and the clutch is disengageable, by the emergency release mechanism, to permit manual movement of the clutch in the first direction to disengage the parking lock.

Abstract: An operating device for a vehicle with an automated transmission and an electrically actuated parking brake system. The device includes a mechanical actuating element for inputting operating commands from the user and a control unit for converting the operating commands into control signals for the transmission and the parking brake system. The actuating element has at least first and second successive stable positions, a neutral position and a return position. In the first stable position, an operating command is generated for the parking brake system to actuate the parking brake device and, in the second stable position, an operating command is generated for the transmission to actuate the parking lock device. The actuating element combines two different actuating elements into an operating device which enables the driver to choose whether, besides activation of the parking brake system, he wishes to additionally engage the parking lock system associated with the transmission.

Abstract: An emergency release mechanism for an automatic transmission includes a shift lever adapted to release a parking position when engaged in an operating position. The shift lever has a hooked or tooth-shaped end portion and is moved by a manually-operated tackle which has an end defined by a surface area of increased diameter to establish an undercut for engagement of the end portion of the shift lever during disengagement of the parking position.

Abstract: A power transfer system (60) for a vehicle to be driven by a prime mover, such as an electric motor, through an input drive shaft (12) carried by the vehicle to be interconnected to an output drive shaft (18) for driving driven wheels of the vehicle. A single speed transmission (68) for an electric motor (62) of a driven vehicle (14) defined by a first drive sprocket (22) connected to an input drive shaft (12) to be driven by an electric motor (62), and a second drive sprocket (24) connected to an output drive shaft (18) for driving driven wheels of the electric motor driven vehicle (14), and an endless flexible loop power transferring member (26) extending between the first and second sprockets (22, 24). A parking brake mechanism (10) for engaging and disengaging with respect to the output drive shaft (18) to prevent rotation of the output drive shaft (18) when engaged by a vehicle operator through mechanical or electrical drive mechanisms (16, 16a).

Abstract: A dual-motion collar device is described, which elicits an additional motion from an operator when initiating a parking brake release in a vehicle. The collar device comprises top and bottom collars with a compressed and torsionally stressed spring there between, such that the collar device maintains a park brake plunger knob in a locked state. An operator twists the top collar to align interlocking features on the top and bottom collars, and then pushes downward to unlock the collar device. The operator then pushes downward on a park brake plunger knob around which the collar device is installed to actuate a parking brake valve assembly and release the parking brake.

Abstract: A shift-by-wire control system includes a parking lock device that brings an output shaft of an automatic transmission device to a lock state when a range switching unit switches to the P-range. The parking lock device brings the output shaft to a lock-release state when the range switching unit switches to another shift range. An electric motor actuates the range switching unit and the parking lock device in accordance with an instruction of an operator. A manual device transmits manual operation force of the operator to the parking lock device when the electric motor stops. The manual device includes a one-way transmission unit permitting transmission of the manual operation force in a direction toward the lock state, and prohibiting transmission of the manual operation force in a direction toward the lock-release state.

Abstract: An emergency release device for manual actuation of the parking lock of a shift-by-wire transmission. The emergency release device comprises a mechanical transfer device located between an emergency release actuator and the transmission and engages a pivoting lever mechanism arranged on a transmission shifting shaft. A characterizing feature of the emergency release device is that the pivoting lever mechanism comprises a primary pivoting lever connected to the transfer device, a secondary pivoting lever connected to the transmission and a unidirectional coupling element located between the primary and the secondary pivoting levers. The advantage of this device relates to reduced susceptibility to corrosion, wear and noise emission and easier correct adjustment of the transfer device during assembly, while a separate prestressing mechanism for the cable of the emergency parking lock release can be omitted.

Abstract: A braking system including a brake, a brake actuator which is operable to apply a force to the brake to effect braking, an automatic braking controller, and a manually operable brake actuator control device, the brake actuator control device including a manually operable control part which is movable between a release position and an apply position and which is adapted such that movement of the control part by a user from the release position to the apply position causes the brake actuator to apply the brake and movement of the control part by a user from the apply position to the release position causes the brake actuator to release the brake, the brake actuator control device being characterized in that it further includes a control actuator which engages with the control part and which is adapted to effect movement of the control part from the release position to the apply position on receipt of an appropriate signal from the automatic braking controller.

Abstract: A parking lock releasing apparatus includes a manipulator element operable to select a parking range of an automatic transmission, a sensor operable to detect a selection by the manipulator element, an actuator operable to operate a parking lock mechanism of the automatic transmission based on a detection by the sensor, and a manual lever operable to manually release an operation of the parking lock mechanism. The manual lever is operable on condition that a parking brake device is in operation.

Abstract: An actuating mechanism (1) for operating a parking-lock mechanism of the drive chain of a vehicle with an automatic drive. The actuating mechanism has a piston unit (4), a detent element and an electromagnetic operating device (6) for operating a release element (7), which is intended for deactivating the detent element (5). The piston unit communicates with an emergency unlocking mechanism (14) and is positioned to open the locking mechanism by way of the piston unit. The detent element, the piston unit and the release element interact such that the locking mechanism remains in the currently engaged state when the locking mechanism is open and the operating device is not electrified, as well as when the locking mechanism is closed and a fluid pressure is applied to the piston unit.

Abstract: A parking lock device for the power train of motor vehicles with automatic transmissions having an actuator and a locking mechanism that is operated by the actuator. A power take-off of the power train locked in a closed condition by the locking mechanism and is free to rotatable in open condition by the locking mechanism. The locking mechanism may be engaged by pressurizing a piston unit of the actuator in a locking direction and may be held in a disengaged condition by a snap-in locking device controlled by an electromagnetic actuator. The snap-in locking device may be deactivated by the electromagnetic actuator. The locking mechanism may be engaged with an emergency locking device and opened with an emergency unlocking device and activated with a common actuator mechanism so that manual activation of the actuator mechanism alternatively disengages or engages the locking mechanism.

Abstract: A parking lock releasing apparatus includes a manipulator element operable to select a parking range of an automatic transmission, a sensor operable to detect a selection by the manipulator element, an actuator operable to operate a parking lock mechanism of the automatic transmission based on a detection by the sensor, and a manual lever operable to manually release an operation of the parking lock mechanism. The manual lever is operable on condition that a parking brake device is in operation.

Abstract: A three transmission position shift control includes a forward position, a neutral position and a reverse position, and a switch or button operable for engaging a park brake or park lock when in the neutral position. The control can include a shift lever shiftable or between the forward, neutral and reverse positions. The park switch or button which can be a momentary switch on the lever or a hand grip of the lever is operable for controlling a solenoid that activates the park brake or park lock. Park is deactivated or released by shifting into forward or reverse.

Abstract: In a vehicle, such as a lawn and garden tractor, having an engine that drives a hydrostatic transmission and having forward and reverse pedals that control the hydrostatic transmission, an operator-actuated transmission locking mechanism locks the forward and reverse pedals in a neutral position. The vehicle includes a parking brake that has a manually set portion to cause engagement of the parking brake. The transmission locking mechanism is mechanically connected to the manually set portion such that the manually set portion and the transmission locking mechanism are actuated together.

Abstract: The invention relates to a parking brake system for transmissions of motor vehicle, especially for an automatic transmission and an automated selector transmission, having one parking brake for blocking or releasing the transmission according to actuation signals of a control device, especially by a pawl engaging and disengaging in a parking brake gear connected with the output of the transmission, an electric operative connection between the control device in the interior of the motor vehicle and the parking brake, a spring accumulator (9) for actuating the parking brake and a pressure-controlled release device of the parking brake. It is proposed to load the release device (10) when releasing the parking brake with a negative pressure independent of the transmission and which is preferably taken from the suction system (15) of the internal combustion engine of the motor vehicle or from a negative pressure brake force booster of the motor vehicle.

Abstract: A brake actuation assembly for a vehicle is actuatable to apply and release tension to one or more elements that connect to a brake system of the vehicle. The brake actuation assembly includes an electrically powered brake actuator, a manually operable control, and a manual brake actuator. The electrically powered actuator includes a motor with a driveshaft for driving connection with the elements. The motor is actuatable to rotate the driveshaft in a brake-applying direction to apply tension to the elements and in a brake-releasing direction to release tension to the elements. The manual actuator includes a handle and a cable. The manual actuator is movable between an operative position wherein the cable connects the handle to the driveshaft to enable rotation of the handle to rotate the driveshaft in the brake-applying and brake-releasing directions via the cable, and an inoperative position wherein the handle is disconnected from the driveshaft.

Abstract: A transmission control device of a vehicle has a shifting body and detects the operating state of the shifting body. The transmission control device shifts the connecting state of the transmission based on the detection result. A parking lock state releasing apparatus for the vehicle includes a releasing switch, which is located in a passenger compartment. An ignition drive device generates gas by causing ignition in response to operation of the releasing switch. The parking lock state of the transmission is changed to the release state using the pressure of the gas.

Abstract: A vehicle parking brake system having an AUTO selector for selectively establishing an automatic mode and a manual mode, parking brake units, and an electronic control unit operable in the automatic mode to automatically activate the parking brake units to apply a parking brake to vehicle rear left and right wheels (RW1, RW2) when the vehicle is in a parked state, and to automatically de-activate the parking brake units to remove the parking brake from the vehicle wheel, and in the manual mode to selectively apply and remove the parking brake to and from the vehicle wheels according to operations of a MANUAL MODE control switch.

Abstract: A driving position selector for selecting at least the driving steps of the automatic transmission, “D”, “N”, “R”, “P”, which are selected by the driver over a control device and engaged by electro-hydraulic setting elements is provided. It is possible to disengage a parking position by a release device in the automatic transmission housing. An operating device is connected by a Bowden cable with a release lever of the release device. The swiveling motion of the release lever is not transferred to the Bowden traction cord, since the release lever can move along a Bowden traction cord suspended in the release lever.

Abstract: A cable device for actuating a control element, in particular for actuating a transmission shift shaft of a motor vehicle transmission, and preferably for actuating a parking lock of the motor vehicle transmission, is provided. The cable device has a core and a sheath substantially encasing the core. The core and the sheath are mounted such that they form a pull-push cable. A first end of the core is operatively connected to the control element, in particular to the transmission shift shaft. A emergency actuation device cooperates functionally with the core in such a way that, in the event of a functional failure of a controlling device, the control element can be, preferably manually, actuated with the emergency actuation device.

Abstract: A transmission control device of a vehicle has a shifting body and detects the operating state of the shifting body. The transmission control device shifts the connecting state of the transmission based on the detection result. A parking lock state releasing apparatus for the vehicle includes a releasing switch, which is located in a passenger compartment. An ignition drive device generates gas by causing ignition in response to operation of the releasing switch. The parking lock state of the transmission is changed to the release state using the pressure of the gas.

Abstract: The driving device comprises a hydraulically shiftable friction coupling and a friction brake by means of which an input can be connected to a gear and which perform the function of a parking brake wherein an auxiliary release device comprising an adjustable accumulator piston and gear shift pistons interacting therewith separate friction coupling and friction brake thus interrupting the drive train; the accumulator cylinder of the auxiliary release device is connected to a supply tank via a connecting line and is provide with a blocking device which cuts off the connection to the supply tank when the auxiliary release device is actuated.

Abstract: A method and apparatus are provided for manually shifting an electrically controlled transmission (14) to a desired gear setting in the event of a failure includes unlocking a manual shift mechanism (90) from a non-actuatable condition. The manual shift mechanism (90) is linearly moved from the non-actuated condition toward an engageable position with a link arm (70) to linearly move the link arm in response to further linear movement of the manual shift mechanism after engagement therewith. A transmission gear (16) is rotated to manually shift the transmission (14) to the desired gear setting through linear motion of the link arm (70).

Abstract: A brake mechanism for braking an axle shaft rotatably supported within an axle housing. A pair of arcuate brake pads are pivotally pinned within the axle housing such that each of the arcuate brake pads can pivot from an brake position engaging the axle shaft and a free position allowing the axle shaft to rotate freely. The arcuate brake pads are spring biased to the free position allowing axle rotation. A simply pulley system is arranged within the axle housing to allow remote actuation of the arcuate brake pads forcing the brake pads into the brake position to frictionally engage the axle shaft thereby providing a braking force. The axle shaft may be splined to engage a corresponding reverse spline profile formed on the inner surface of the arcuate brake pads to provide a positive braking force to lock the shaft preventing rotation. The brake arrangement is preferably employed to brake an input shaft in a differential assembly or in any drive shaft of a transfer case.

Abstract: In an electric parking lock device having a motor for generating a drive force for engagement and release of a parking lock pawl from a parking lock gear in response to a command output from a selector switch. A compression spring if used for applying a force so as to release the parking lock pawl from the parking lock gear. A shift arm is provided on a side which is closer to an input end of the parking lock pawl than to the compression spring, whereby when driving of the parking lock pawl in a lock releasing direction is effected, the motor side and the parking lock pawl side are connected directly, while when driving the parking lock pawl in a lock effecting direction, the compression spring is interposed between the motor side and the parking lock pawl, so that a manual lock release operation can be performed within a range where the compression spring is allowed to be deflected irrespective of the state of the motor.