A drive unit includes a first electric machine including a first machine shaft, a second electric machine including a second machine shaft, and a differential interconnecting the first electric machine and the second electric machine. The differential includes a park gear. The drive unit further includes a single park system configured to engage the park gear of the differential to simultaneously stop rotation of both the first electric machine and the second electric machine. The park system includes a single pawl movable between an engaged position and a disengaged position. The pawl is spaced apart from the park gear of the differential in the disengaged position to allow the park gear to rotate. The single pawl is in contact with the park gear of the differential in the engaged position to preclude rotation of the park gear.

In the park lock arrangement according to embodiments, a pivoting park pawl is arranged with a roller member against which a lower bearing surface of an actuating member is configured to bear for controlling the park pawl to pivot between a park release position and a park lock position. An upper bearing surface of the actuating member is further configured to bear against an actuator support roller being configured to assist the actuating member in pressing against the roller member of the park pawl to cause the park pawl to pivot. The roller member and the actuator support roller will decrease frictional force arising when the actuating member moves into contact with the roller member for pivoting the park pawl.

Non-inverted park lock systems and methods include an engine controller configured to control an engine of a vehicle in communication with a separate transmission controller via a controller area network (CAN), wherein the transmission controller is configured to control a transmission of the vehicle; and a conductor connecting the engine controller to a park lock solenoid disposed in the transmission and configured to move a park pawl to engage/disengage park. The engine controller keeps the park pawl disengaged from park during a power loss malfunction at the transmission controller and the transmission controller keeps the park pawl disengaged from park during a power loss malfunction at the engine controller by maintaining hydraulic pressure in the transmission at a threshold level until park is requested via the shifter.

A brake lock system for a pumpjack brake apparatus comprises a latch handle lever pivotally mounted at a location on a pumpjack, a countershaft rotatably mounted on the pumpjack, latch handle linkage, and control linkage that transitions movement and force of the latch handle lever to a latch arm with a latch dog for pivoting the latch arm to insert the latch dog in a notch in the pumpjack brake apparatus. The latch handle, latch handle linkage, control linkage, and latch arm have dimensions that provide a mechanical advantage of the latch handle lever over the latch arm.

A clutch assembly for a motor vehicle drivetrain for coupling coupling elements for conjoint rotation includes a clutch unit, a brake unit and at least one permanent magnet between the clutch unit and the brake unit. The clutch unit is shiftable into a coupling state in which the coupling elements are coupled to one another by shifting the clutch unit from a first position in which the coupling elements are decoupled into a second position in which the coupling elements are coupled. First and second electrically energizable coils are electrically energizable to move the permanent magnet from the first position into the second position or vice versa. A holding plate is located adjacent to the at least one permanent magnet to suppress magnetic flux from the at least one permanent magnet to the brake unit. A motor vehicle drivetrain containing at least one clutch assembly is also provided.

An electromotive actuator assembly for an electromechanical vehicle brake is disclosed having a transmission that comprises transmission shafts, cylindrical brake surface provided in the transmission and which encircles an axis of rotation, and a blocking element mounted eccentrically with respect to the axis of rotation. The blocking element is adjustable about a pivot axis by a drive unit and can be placed in contact with the cylindrical brake surface. The blocking element is arranged so as to become wedged together with the cylindrical brake surface with self-locking action in only one direction of rotation of the cylindrical brake surface about the axis of rotation (A). The disclosure also relates to a method for activating and deactivating a parking brake function.

An engine controller calculates a pulsation correction value based on actuation states of an air bypass valve (ABV) and a wastegate valve (WGV) that change the shape of intake and exhaust flow passages of an exhaust turbocharger. The pulsation correction value is used to compensate for an output error of an airflow meter caused by intake pulsation. The engine controller also calculates a fuel injection amount of an injector, based on an output of the airflow meter that has been corrected based on the pulsation correction value.

A block-like electric drive providing two single-wheel drives on one axle comprises two electric machines, each having a parallel rotor axis and a transmission on an end face. The single-wheel drives or the electric machines are arranged at least partially congruent with each other in a longitudinal vehicle direction for installation. A respective inverter serves to actuate each one of the two electric machines, the inverters being arranged next to each other at a highest point of the drive block in the installation position. The two electric machines are arranged one behind the other with regard to their housings. The drive block thus has two drives with separate transmission housings. Each drive can advantageously be equipped with a parking lock for blocking an output shaft. A locked state can thus be created in each drive combination.

System and method relates to a firewater monitor brake system, comprising a vertical locking disc collar adapted to be affixed externally or internally to a horizontal swivel of a firewater monitor system; a horizontal locking disc collar adapted to be affixed externally or internally to a vertical swivel of the firewater monitor system; a vertical brake mount adapted to be affixed to a horizontal swivel mounting pad of the firewater monitor system; a horizontal brake mount adapted to be affixed to a vertical swivel mounting pad of the firewater monitor system; a vertical brake system; wherein the vertical brake system is affixed to the vertical brake mount such that a portion of the vertical brake system is disposed around a portion of the vertical locking disc collar; a horizontal brake system, wherein the horizontal brake system is affixed to the horizontal brake mount such that a portion of the horizontal brake system is disposed around a portion of the horizontal locking disc collar; and a master cylinder adapted to be affixed to a tiller bar of the firewater monitor system, wherein the master cylinder is connected to and/or coupled to a lever system and wherein the master cylinder is connected to and or coupled to the vertical brake system and/or the horizontal brake system via an actuation system. Methods for making and using the system are also disclosed.

System and method relates to a firewater monitor brake system, comprising a vertical locking disc collar adapted to be affixed externally or internally to a horizontal swivel of a firewater monitor system; a horizontal locking disc collar adapted to be affixed externally or internally to a vertical swivel of the firewater monitor system; a vertical brake mount adapted to be affixed to a horizontal swivel mounting pad of the firewater monitor system; a horizontal brake mount adapted to be affixed to a vertical swivel mounting pad of the firewater monitor system; a vertical brake system; wherein the vertical brake system is affixed to the vertical brake mount such that a portion of the vertical brake system is disposed around a portion of the vertical locking disc collar; a horizontal brake system, wherein the horizontal brake system is affixed to the horizontal brake mount such that a portion of the horizontal brake system is disposed around a portion of the horizontal locking disc collar; and a master cylinder adapted to be affixed to a tiller bar of the firewater monitor system, wherein the master cylinder is connected to and/or coupled to a lever system and wherein the master cylinder is connected to and or coupled to the vertical brake system and/or the horizontal brake system via an actuation system. Methods for making and using the system are also disclosed.