A controller for a vehicle driven by transmitting a torque generated by a torque generator to driving wheels corrects the torque generated by the torque generator according to a torsion rate of an elastic torsion element present in a torque transmission system extending from the torque generator to the driving wheels to reduce the torsional vibration of the elastic torsion element. The torque generator may include an engine and a clutch to transmit a rotation of the engine to the torque transmission system. The controller may include a clutch controller to correct the torque generated by the torque generator by controlling the transmission torque of the clutch according to the torsion rate of the elastic torsion element.

A control device includes: an engagement mechanism having a first engagement element and a second engagement element; and an actuator that generates a thrust that brings the first engagement element and the second engagement element close to each other when the engagement mechanism is engaged. The control device performs engagement with the thrust of the actuator when a differential rotation speed of the engagement mechanism is less than a predetermined value. In the control device, a parameter indicating an operating state of the actuator is detected, a target differential rotation speed is calculated in accordance with a value of the detected parameter, and the differential rotation speed is controlled to the calculated target differential rotation speed.

A friction engagement element control system is provided, which includes a friction engagement element including friction plates, which are an input-side friction plate and an output-side friction plate, and an actuation system configured to engage the input-side friction plate with the output-side friction plate with a pushing force, the friction plates having a characteristic in which a friction coefficient thereof decreases as a rotational difference between the friction plates increases. The device includes a controller configured to control the pushing force so that the negative slope characteristic becomes a positive slope characteristic in which a frictional force of the friction engagement element decreases as the rotational difference decreases, when engaging the friction engagement element.

A driving force transmission control device includes a driving force transmission device configured to press a friction clutch by an actuator and a controller configured to control the driving force transmission device. The controller calculates a torque command value indicating a driving force to be transmitted from a rotating member on an input side to a rotating member on an output side based on information of a vehicle. The controller sets an electric current command value according to a magnitude and an amount of time change of the torque command value. The electric current command value is a target value of an electric current. The controller performs electric current feedback control such that an electric current corresponding to the calculated electric current command value is supplied to the actuator.

A friction engagement element control system is provided, which includes a friction engagement element including friction plates, and an actuation system configured to engage an input-side friction plate with an output-side friction plate with a pushing force, the friction plates having a negative slope characteristic in which a friction coefficient thereof decreases as a rotational difference between the friction plates increases, a rotational difference sensor of the friction engagement element, a separator configured to divide a variation in the detected rotational difference into a high-frequency component that is a vibration component and other low-frequency components, and a controller configured to control a pushing force only for the vibration component of the rotational difference so that the negative slope characteristic becomes a positive slope characteristic in which a frictional force of the friction engagement element decreases as the rotational difference decreases, when engaging the friction engagement element.

A controller for a vehicle driven by transmitting a torque generated by a torque generator to driving wheels corrects the torque generated by the torque generator according to a torsion rate of an elastic torsion element present in a torque transmission system extending from the torque generator to the driving wheels to reduce the torsional vibration of the elastic torsion element. The torque generator may include an engine and a clutch to transmit a rotation of the engine to the torque transmission system. The controller may include a clutch controller to correct the torque generated by the torque generator by controlling the transmission torque of the clutch according to the torsion rate of the elastic torsion element.

The invention relates to a clutch unit for a motor vehicle, comprising: a clutch, the clutch having an axially stationary, rotatable coupling element with an axially extending toothing, and an axially displaceable, rotatable mating element with an axially extending mating toothing, the mating element being displaceable into a first position and a second position; and a sensor unit, the sensor unit being disposed radially in relation to the axial extension of the toothing of the coupling element such that the sensor unit senses the toothing of the coupling element. When the mating element is in the first position and when it is in the second position, the sensor unit detects a sensor signal via which the rotational speed of the coupling element and the first position of the mating element, the second position of the mating element, or a position of the mating element between the first position and the second position can be determined. The invention also relates to a motor vehicle drive train comprising a clutch unit of this type.

A transmission for a vehicle includes a first rotating member for rotation about an axis and a second rotating member for rotation about the axis. The first rotating member and the second rotating member are connectable to each other such that the first rotating member and the second rotating member are rotationally locked relative to each other for transferring torque between the first rotating member and the second rotating member. The transmission comprises a sensor arrangement for measuring a relative angular position of the first rotating member and the second rotating member while at least one of the first rotating member and the second rotating member is rotating.

A vehicle includes: a transmission including an input shaft that receives power inputted from a power source for travel of the vehicle and an output shaft that outputs power to a drive wheel; a manual gear shifting power transmission mechanism that delivers an operation force of a driver as gear shifting power to the transmission; a clutch disposed between the power source for travel of the vehicle and the input shaft; and a controlled clutch actuation power transmission mechanism that delivers power of a clutch actuator as clutch actuation power to the clutch.

Power transmission systems including clutch arrangement and control systems are adapted to be used in numerous different operational environments. Such power transmission systems may include clutch arrangements that provide more effective power transmission capabilities as well as greater durability and longer life. Control arrangements are provided to more effectively control and monitor clutch operation in ways that provide for greater system flexibility and drive options.