A method for controlling torque transfer of a force-fitting shift element includes controlling a closing pressure at least temporarily upon presence of a closing request for the force-fitting shift element and when a prevailing system pressure of the hydraulic circuit is above a threshold value for the system pressure. The closing pressure is controlled in a manner that is different than upon the presence of the closing request for the force-fitting shift element and when the prevailing system pressure is below the threshold value for the system pressure.

A control apparatus of a hybrid vehicle having an electric oil pump includes an engine clutch selectively engaging an engine and a drive motor; an automatic transmission changing a power generated from the engine by engagement and releasing of a friction element into a required torque depending on a speed; a hydraulic pressure sensor sensing an oil pressure supplied to the engine clutch; a temperature sensor sensing an oil temperature discharged from the electric oil pump; a hybrid control unit (HCU) controlling the electric oil pump to selectively engage the engine clutch depending on a driving state; and a transmission control unit (TCU) controlling the electric oil pump to supply transmission control pressure to the friction element. The electric oil pump includes an oil motor and a pump to supply the operating hydraulic pressure to the engine clutch and the friction element.

A hybrid vehicle includes an engine, an electric machine, a disconnect clutch configured to selectively couple the engine to the electric machine, and a controller. The controller is programmed to, in response to a request to start the engine with the electric machine, command a target pressure to the disconnect clutch that depends on a seal friction derived from a measured line pressure of the disconnect clutch and a rate change of the measured line pressure.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

An agricultural vehicle has wheel groups, an engine group, a continuously variable transmission group connecting the engine group to the wheel groups and having a hydraulic device, user management elements for driving the agricultural vehicle and setting motion modes thereof, and vehicle management elements for detecting operating conditions of the agricultural vehicle by detecting speed of the agricultural vehicle, engine revolutions, gear ratio and hydraulic pressure value of the continuously variable transmission group. A management and command system, operatively connected to the user management elements, the vehicle management elements, the engine group and the continuously variable transmission group, commands the continuously variable transmission group in at least one driving operating configuration, in which a hydraulic action of the hydraulic device is commanded according to predefined steps, and at least one auxiliary operating configuration in which the hydraulic action of the hydraulic device is commanded according to a continuous course over time.

In a hybrid electric vehicle and a touchpoint learning method therefor, while a motor is driven, an engagement oil pressure of an engine clutch is adjusted step-by-step, to learn a touchpoint, thereby reducing touchpoint learning time and improving learning accuracy. The touchpoint learning method may include: determining whether a touchpoint learning entry condition previously set is satisfied or not; controlling a first motor connected to one end of an engine clutch to be in a stopped state when the learning entry condition is satisfied; maintaining a second motor connected to the other end of the engine clutch at a preset speed; changing an engagement oil pressure of the engine clutch step-by-step; and learning a touchpoint of the engine clutch based on a torque change of the second motor.

A hybrid vehicle includes a forward-backward travel changeover mechanism including a forward clutch and a reverse brake, a continuously variable transmission, an engine, a motor generator, an output clutch, a mechanical oil pump, an electric oil pump, a manual valve, an oil passage, and a control unit. The manual valve supplies oil to the forward clutch when a parking range is selected. When a state of charge of a high voltage battery decreases to a predetermined value or lower in the parking range, the control unit disengages the output clutch, engages the forward clutch, and causes the engine to operate to drive the motor generator as a generator. When a backward traveling range is selected while power generation is being performed in the parking range, the control unit drives the electric oil pump, and supplies the oil to the output clutch or the reverse brake through the oil passage.