This clutch control device includes an engine (13), a transmission (21), a clutch device (26) configured to connect and disconnect motive power transmission between the engine (13) and the transmission (21), a clutch actuator (50) configured to drive the clutch device (26) and change a clutch capacity, a clutch operating element (4b) configured to enable the clutch device (26) to be manually operated, and a control unit (60) configured to calculate a target value (Pt) of a control parameter (Ps) of the clutch capacity in accordance with an amount of operation on the clutch operating element (4b). When the clutch device (26) is operated on a connection side according to an operation on the clutch operating element (4b), the control unit (60) is configured to set the target value (Pt) to a quick connection target value (Pmax) obtained by making a change to the connection side of the clutch device (26) with respect to an operation correspondence target value (Pv) according to the amount of operation on the clutch operating element (4b) if a speed of the operation on the clutch operating element (4b) is higher than or equal to a predetermined specified speed (Sp1).

A hydraulic system includes a normally open-type hydraulic clutch which connects or disconnects a power transmission line between an engine and a wheel, an actuator which supplies a hydraulic pressure to the hydraulic clutch, an oil flow path which connects the actuator to the hydraulic clutch, a valve member which is provided on the oil flow path and which enables to switch between an open state where the oil flow path communicates and a closed state where the oil flow path closes, a hydraulic pressure sensor which is provided on the oil flow path, and a bypass flow path which bypasses the valve member. A one-way valve, which permits a supply of a hydraulic pressure from an actuator side to a hydraulic clutch side and which shuts off a supply of a hydraulic pressure from the hydraulic clutch side to the actuator side, is provided on the bypass flow path.

A clutch control device includes an engine, a gearbox, a clutch device configured to disconnect and connect power transmission between the engine and the gearbox, a clutch actuator configured to drive the clutch device and vary a clutch capacity, an engine rotational number sensor configured to detect an engine rotational number, a throttle opening angle sensor configured to detect a throttle opening angle, and a controller configured to calculate a control target value of the clutch capacity, wherein the controller calculates an estimated engine torque and causes the clutch device to change a slip clutch capacity according to the estimated engine torque.

A clutch control device includes an ECU that controls a clutch actuator, the ECU sets a control target value of the clutch capacity according to the operation amount detected by the clutch operation amount sensor, and executes feedback control so that the control parameter which is detected by the control parameter sensor approaches the control target value, and changes a method of the feedback control when the control parameter reaches a predetermined control state change determination value during the feedback control.

This clutch control device includes an engine (13), a transmission gear (21), a clutch device (26), a clutch actuator (50), a control unit (60), a control parameter sensor (58), a clutch operator (4b), and a clutch operation amount sensor (4c), wherein the control unit (60) is configured to enable intervention of a manual clutch operation according to the clutch operator (4b) during automatic control of the clutch device (26) according to the clutch actuator (50), and the control unit (60) is configured to set a control target value of a clutch capacity to a connection preparation target value (Py) acquired by causing an operation target value (Pv) corresponding to an amount of operation of the clutch operator (4b) to approach a disconnection determination value (Pz) in a case in which a control parameter detected by the control parameter sensor (58) reaches the disconnection determination value (Pz) set in advance at a time of performing a clutch disconnection operation through intervention of the manual clutch operation.

This clutch control device includes a clutch device, a clutch actuator, a hydraulic pressure circuit device, hydraulic pressure sensors, a control device, and a control valve for controlling a flow of a working fluid between the clutch device and the clutch actuator. The hydraulic pressure sensors include an upstream side hydraulic pressure sensor and a downstream side hydraulic pressure sensor. The control device is configured to perform feedback control of the clutch actuator using hydraulic pressure detection information of a side on which hydraulic pressure fluctuation is small, among the hydraulic pressure detection information of each of the upstream side hydraulic pressure sensor and the downstream side hydraulic pressure sensor, in the case of driving the clutch actuator toward a pressurization side and in the case of driving the clutch actuator to a decompression side.

A clutch control device includes a clutch device that disconnects and connects a power transmission between an engine and a gearbox, a clutch actuator that drives the clutch device and changes a clutch capacity, an ECU that calculates a control target value of the clutch capacity, a clutch lever that manually operates the clutch device, and a clutch lever operation amount sensor that converts an operation amount of the clutch lever into an electrical signal, wherein the ECU calculates a clutch operation speed on the basis of the operation amount detected by the clutch lever operation amount sensor, and changes a disconnection and connection speed of the clutch device according to the clutch operation speed.

A clutch control device includes an engine, a gearbox, a clutch device configured to disconnect and connect power transmission between the engine and the gearbox, a clutch actuator configured to drive the clutch device and vary a clutch capacity, and an ECU configured to calculate a control target value of the clutch capacity, and the ECU determines whether an engine rotational number after downshifting by the gearbox enters a high rotation region and decreases the clutch capacity after downshifting when it is determined that the engine rotational number after downshifting enters the high rotation region.

A power transmission device for a vehicle includes a control unit adapted to automatically control engagement or disengagement of a clutch, and is further equipped with a clutch lever for manually engaging or disengaging the clutch. The power transmission device includes a manual mode in which the clutch is engaged or disengaged by a driver performing an engagement or disengagement operation with the clutch engagement/disengagement operating element and an automatic mode in which the clutch is engaged or disengaged under the control of the control unit without the driver performing the engagement or disengagement operation. The manual mode or the automatic mode is selectable by the driver. In the manual mode, it is further possible to select a plurality of control modes with differing levels of intervention of the automatic control.

This vehicle transmission system includes a transmission (21) in which a gear is shifted by an operation of a driver of a vehicle (1), a clutch device (26) that is disposed in a motion transfer path between the transmission (21) and an engine (13) of the vehicle (1), and is disconnected and connected by an action of a clutch actuator (50), and a clutch control unit (61) that is configured to control disconnection and connection of the clutch device (26) by the clutch actuator (50). In a case where the vehicle (1) is started with a gear position of the transmission (21) located at or above a gear that is set in advance, and a vehicle speed (V) is less than or no higher than a set value (v2) that is set in advance, the clutch control unit (61) transitions to clutch capacity-limiting control in which a clutch capacity is reduced below that during normal clutch control.