A hydraulic transformer clutch employs radial hydraulic piston assemblies with integrated electrohydraulic actuation. The hydraulic transformer clutch includes: an output shaft, an output disc affixed to the output shaft for rotation therewith, an input shaft, a rotatable housing affixed to one of the input shaft or the output shaft for rotation therewith, a plurality of hydraulic cylinders, and a plurality of working pistons. The hydraulic cylinders are operatively connected to the rotatable housing, and are spaced about the rotatable housing. Each working piston is slidably mounted within a corresponding hydraulic cylinder of the plurality of hydraulic cylinders, and is positioned to be selectively pushed, when actuated, to create a rigid connection between the input shaft and the output shaft. One or more actuator pistons are pushed by an electromagnet and create pressure that is distributed on working piston surfaces and generates active torque.

A clutch assembly is disclosed herein. The clutch assembly includes a joint balance chamber positioned between a disconnect apply chamber and a torque converter clutch apply chamber. A torque converter assembly includes a charge pressure fluid circuit. A hub defines a passage between the charge pressure fluid circuit and the joint balance chamber, such that fluid from the torque converter assembly is provided to the joint balance chamber.

A clutch assembly is disclosed herein. The clutch assembly includes a joint balance chamber positioned between a disconnect apply chamber and a torque converter clutch apply chamber. A torque converter assembly includes a charge pressure fluid circuit. A hub defines a passage between the charge pressure fluid circuit and the joint balance chamber, such that fluid from the torque converter assembly is provided to the joint balance chamber.

A clutch assembly is disclosed herein. The clutch assembly includes a joint balance chamber positioned between a disconnect apply chamber and a torque converter clutch apply chamber. A torque converter assembly includes a charge pressure fluid circuit. A hub defines a passage between the charge pressure fluid circuit and the joint balance chamber, such that fluid from the torque converter assembly is provided to the joint balance chamber.

A clutch assembly is disclosed herein. The clutch assembly includes a joint balance chamber positioned between a disconnect apply chamber and a torque converter clutch apply chamber. A torque converter assembly includes a charge pressure fluid circuit. A hub defines a passage between the charge pressure fluid circuit and the joint balance chamber, such that fluid from the torque converter assembly is provided to the joint balance chamber.

In a clutch (14) for a construction machine (1), comprising a drive-side end (58) and a driven-side end (60), a driven shaft (22), wherein, at the drive-side end (58), a drive-side bearing (40) is arranged at the driven shaft (22), it is specified for the following features to be achieved: that a lubricant line (42) for lubrication of the drive-side bearing (40) is specified which leads from the driven-side end (60) to the drive-side bearing (40) and extends, at least sectionally, through the driven shaft (22).

In a clutch (14) for a construction machine (1), comprising a drive-side end (58) and a driven-side end (60), a driven shaft (22), wherein, at the drive-side end (58), a drive-side bearing (40) is arranged at the driven shaft (22), it is specified for the following features to be achieved: that a lubricant line (42) for lubrication of the drive-side bearing (40) is specified which leads from the driven-side end (60) to the drive-side bearing (40) and extends, at least sectionally, through the driven shaft (22).

A vehicle includes a transmission having a plurality of friction elements selectively engageable to establish power flow paths within the transmission. A controller of the vehicle is programmed to, during a boost phase of a shift, command a first hydraulic boost pressure for a plurality of control loop cycles to an oncoming one of the friction elements (oncoming friction element) and subsequently command a second hydraulic boost pressure less than the first hydraulic boost pressure for only a single control loop cycle that defines an end of the boost phase to the oncoming friction element.

A frictional engagement element includes: a first piston, a second piston, a first urging member for urging the first piston in a direction of releasing a friction plate, and a second urging member for urging the second piston in the direction of releasing the friction plate with an urging force larger than the urging force of the first urging member. One of the first and second pistons has a communicating hole for connecting an engaging hydraulic chamber with an opposite hydraulic chamber and the other of the first and second pistons has a valve part for closing the communicating hole. The difference in travel distance between the first and second pistons in motion due to the different urging forces of the first and second urging members causes the valve part to open the communicating hole.

A frictional engagement element includes: a first piston, a second piston, a first urging member for urging the first piston in a direction of releasing a friction plate, and a second urging member for urging the second piston in the direction of releasing the friction plate with an urging force larger than the urging force of the first urging member. One of the first and second pistons has a communicating hole for connecting an engaging hydraulic chamber with an opposite hydraulic chamber and the other of the first and second pistons has a valve part for closing the communicating hole. The difference in travel distance between the first and second pistons in motion due to the different urging forces of the first and second urging members causes the valve part to open the communicating hole.