A gearwheel (10), in particular a parking interlock gear, includes an annular body (1). The annular body includes a first toothing (2), arranged on an outer circumference of the annular body, for engaging a locking pawl (20), and a second toothing (3), arranged on an inner circumference of the annular body, for the form-locking connection to a shaft (30).

The present invention relates to a locking actuator (2) for a brake transmission (1), in particular for a brake transmission (1) of an electric parking and/or service brake, having a driving device (5), a housing (10), a transmission (20) with an axis of rotation (R) and an output (24), and a ratchet slide (30), which is movable in an axis (L) between a first position and a second position along a locking path, wherein the output (24) is coupled to the ratchet slide (30) via an eccentric (25) and can move the ratchet slide (30) in the axis (L) when the output (24) is rotated. In addition, the present invention relates to a brake transmission (1) and an operating and/or parking brake.

Some embodiments relate to an electro-mechanical actuator that includes a screw, structurally segregated (split) housings, first and second nuts coupled to the screw, a sensor assembly, a plurality of motors, and a controller. The first nut is coupled to a first mounting point, and the second nut is coupled to a second mounting point. The sensor assembly may generate signals indicative of (e.g., relative) positions of left and right units of the actuator or positions of the first nut and the second nut on the screw. The controller controls the motors based on the signals generated by the sensor assembly. The motors may rotate each nut about a screw axis of the screw. This rotation results in one or both nuts moving along the screw. Movement between the first nut and the second nut along the screw adjusts a distance between the first mounting point and the second mounting point.

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.

Methods, apparatus, systems, and articles of manufacture to extend brake life cycle are disclosed herein. An example vehicle includes a first brake associated with a first wheel of the vehicle, a second brake associated with a second wheel of the vehicle, memory, and a brake controller to execute instructions to detect a first parking event, determine, via a first sensor, a condition of the vehicle, access, from the memory, a record of a second parking event including an activation of the first brake, the second parking event preceding the first parking event, and in response to determining the condition satisfies a threshold, engage the second brake without engaging the first brake.

A transmission system is provided that includes a mechanical reverse assembly designed to selectively mechanically couple a reverse gearset to an output shaft of an electric machine and a first primary shaft. In the mechanical reverse assembly, a coupling device may be automatically shifted to attach the reverse gearset to the first primary shaft in a reverse drive configuration in any of a hybrid mode, a full electric vehicle (EV) mode, and a full internal combustion engine (ICE) mode.

A self-driving work vehicle, including: a traveling apparatus; a vehicle body supported by the traveling apparatus on ground; a variable traveling power supply apparatus configured to supply rotational drive power to the traveling apparatus; a travel operation interface configured to adjust a rate of the rotational drive power; a parking brake provided for a transmission shaft of the variable traveling power supply apparatus; a rotation detector configured to detect rotation of the traveling apparatus or the transmission shaft; and a controller configured or programmed to: control the parking brake to a braking state or a non-braking state by a parking brake control module; manage the braking state or the non-braking state as a vehicle body state by a condition management module, the braking state and the non-braking state being operating states of the parking brake.

A brake apparatus for a vehicle may include: a drive unit configured to generate driving power; a transmission gear configured to be rotated by the driving power transmitted from the drive unit; a piston configured to move forward or rearward in conjunction with the rotation of the transmission gear and press or release a pad in a direction in which the piston moves forward or rearward; a parking gear configured to engage with the transmission gear and rotate in conjunction with the rotation of the transmission gear; and a restriction unit installed to be movable toward the parking gear and configured to restrict the rotation of the parking gear by being inserted into the parking gear during parking braking.

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.