A parking lock has a parking lock housing (20), a locking pawl (12) which has a ratchet (16) that can be locked in a parking lock wheel (56) and a pawl profile (44) arranged on the rear side of the ratchet (16), an actuating unit (24) which acts upon the pawl profile (44) when the parking lock (10) is engaged and thereby rotates the locking pawl (12) about a rotational axis (14) relative to the parking lock housing (20), and a supporting element (18), on which the actuating unit (24) is supported in the engaged state (P) and in the disengaged state (nP) of the parking lock (10) at different positions. The supporting element (18) is connected to the parking lock housing (20) so as to have play.

An electrohydraulic transmission control system having a parking lock valve by which a parking lock cylinder of a parking lock device can be charged with an actuation pressure adjustable in an operating-state-dependent manner by at least one pilot pressure adjustable in the region of an electrohydraulic pressure adjuster and/or one pressure source. Above a defined actuation pressure level, the parking lock valve can be held in a defined operating state in which the actuation pressure can be applied to the parking lock cylinder. The actuation and pilot pressures can be applied to a valve device such that when the actuation and pilot pressure levels approximately correspond to one another, the region of the control system which conducts the actuation pressure is operatively connected, upstream of the parking lock valve, to a pressure region in the region of the valve device with a pressure lower than the defined actuation pressure level.

An electrohydraulic transmission control system (1) includes a parking lock valve (2). The electrohydraulic transmission control system (1) is configured such that, during normal operation of the electrohydraulic transmission control system (1) in which at least one electrohydraulic pressure adjuster (EDSSYS) is actuatable with current, the parking lock valve (2) can be held in a defined operating state in which an actuation pressure (p_sys) acts on a parking lock cylinder (3) above a normal pressure level. The electrohydraulic transmission control system (1) is configured such that, during emergency operation of the electrohydraulic transmission control system (1) in which the at least one electrohydraulic pressure adjuster (EDSSYS) is not fed with current and the actuation pressure (p_sys) is at least temporarily set to an emergency pressure level higher than the normal pressure level by the at least one pressure source (7), a pressure level of the actuation pressure (p_sys) that holds the parking lock valve (2) in the defined operating state corresponds at least approximately to the emergency pressure level.

A hydraulic parking lock actuation module for a parking lock with a parking lock piston, which can be hydraulically actuated in a parking lock cylinder from an initial position in an actuation direction by applying an actuation pressure, and which is mechanically coupled to an actuation rod which can be fixed via an engaging device in order to act as a locking mechanism for the parking lock piston. In order to simplify the actuation of the parking lock, for actuating the parking lock piston and the locking mechanism for the parking lock piston, the hydraulic parking lock actuation module includes only one active actuation valve with a tank connection and a working pressure connection at which different hydraulic pressure levels are applied.

A locking unit with a hydraulically actuable piston, an electromagnet with a coil and an armature, at least one latching element, a coupling rod, and a magnetic element. The coupling rod connects the magnetic element to the armature or an armature rod which is attached thereto, and a prestressing element fixes the magnetic element in a guide tube radially. As a result, an advantageous position determination is made possible by way of sensing of a magnetic field which is generated by the magnetic element.

An actuator element is provided for a parking brake that has a mechanically acting actuating mechanism and that can be coupled via a shiftable clutch device to a pump drive of a hydraulic system of a primary assembly by means of a shiftable clutch device in order to activate the parking brake

A device for locking a piston rod of a piston includes a latching mechanism actuatable by an actuating element. The actuating element is fixedly arranged on an armature rod of an electromagnet, is clamped between two preloading springs, and includes two actuating contours. Components of the device are configured with respect to geometry and with respect to forces acting upon each of the components such that a permanent magnet holds the armature rod in a first position in the non-energized condition of an electromagnet and in the engaged condition of the parking lock and such that the electromagnet holds the armature rod in a second position in the energized condition and in the disengaged condition of the parking lock. The parking lock is disengageable in the pressurized condition of the piston and in the energized condition of the electromagnet, and the parking lock is engageable in the non-pressurized condition of the piston and in the non-energized condition of the electromagnet.

A method for operating an automatic transmission apparatus having a parking lock device. The parking lock device has a hydraulic apparatus with a hydraulic cylinder and a hydraulic piston arranged therein, which can be placed in at least two positions by a lock apparatus and an emergency unlock apparatus. The hydraulic piston is operatively connected to a shifting shaft of the parking lock device, and a pressure can be adjusted in the hydraulic cylinder by a hydraulic valve. The shifting shaft can be shifted within an operating position range by the hydraulic apparatus. In doing so, upon activation of the emergency unlock apparatus, the shifting shaft is shifted into a position that is outside of the operating position range, and an operating state of the emergency unlock apparatus is checked.

A securing device for securing a stationary state of an electric vehicle includes a gearshift interlock device and a differential interlock device. The gearshift interlock device has a gearshift interlock drive with a gearshift interlock shaft for driving a gearshift interlock between a gearshift interlock position and a gearshift release position. The differential interlock device has a differential interlock drive with a differential interlock shaft for driving a differential interlock between a differential interlock position and a differential release position. The gearshift interlock shaft and the differential interlock shaft are connected to one another in a drive-transmitting fashion.

One aspect of a motor unit of the present invention is a drive apparatus including a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil. The housing includes a motor room that houses the motor, a gear room that houses the transmission mechanism and the lock mechanism, and a partition that is provided between the motor room and the gear room. The oil passage includes a pump that pumps the oil in the oil passage, a first feed flow passage that feeds the oil to the motor, and a second feed flow passage that feeds the oil to the lock mechanism.