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 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.

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.

A clutch control hydraulic circuit includes first and second solenoid valves connected to a control unit, the first solenoid valve is provided between a first hydraulic pathway and a downstream junction hydraulic pathway normally switches to an open state when not energized, and switches to a closed state when energized; and the second solenoid valve is provided between a second hydraulic pathway and the junction hydraulic pathway, switches to a closed state when not energized, and switches to an open state when energized. The first solenoid valve maintains its closed state when switched to a non-energized state from an energized state while pressure of the junction hydraulic pathway is higher than that of the first hydraulic pathway, and when the first solenoid valve is thus closed in its non-energized state, pressurizing the upstream side hydraulic pathway by operation of a clutch lever opens the first solenoid valve.

A vehicle having a clutch which connects an engine with a driveline which includes a multi-ratio gearbox, the clutch having an actuator which can be operated by a vehicle driver to engage and disengage the clutch, the actuator also having a control system arranged to move the clutch between fully engaged and fully released positions through a range of positions allowing variable levels of clutch slip in order to automatically reduce torsional vibrations in the driveline. The control system is configured to recognize a plurality of predetermined Vehicle Operation Modes defined by the combination of a Clutch Slip Status criterion as hereinbefore defined with one or more of the hereinbefore defined operating criteria of Manual Clutch Position Control Input Interface Status, Release Bearing Position Status and Slip Velocity Demand Status and, dependent on the recognized Vehicle Operation Mode, the control system applies a different clutch control strategy to achieve the required level of clutch slip to damp vibration in the driveline and provide transition between the different Vehicle Operation Modes without exciting an uncomfortable level of vibration in the driveline.

A clutch control device includes a clutch apparatus (26) configured to connect and disconnect power transmission between a prime mover (13) and an output object (21), a clutch actuator (50) configured to output a driving force for actuating the clutch apparatus (26), a controller (40) configured to control driving of the clutch actuator (50), and a clutch operator configured to operate the clutch apparatus (26) regardless of the driving of the clutch actuator (50), the controller (40) detects that there is a manual operation by the clutch operator when a difference of a predetermined value or more is detected between a reference output value of the clutch actuator (50) configured to operate the clutch apparatus (26) and a measured value of an output value of the clutch actuator (50).

This clutch control device includes a clutch apparatus configured to connect and disconnect power transmission between a prime mover and an output target, a clutch actuator configured to output a driving force for actuating the clutch apparatus, and a driving mechanism configured to receive the driving force of the clutch actuator and actuate the clutch apparatus, and the driving mechanism is able to apply a driving force in either a disconnecting direction or a connecting direction to the clutch apparatus.

A control device includes a connecting member connected to a release operation member of a clutch device, an electric actuator for displacing the release operation member through the connecting member, a control unit configured to displace the release operation member by driving the electric actuator so as to change a clutch capacity of the clutch device, a first sensor configured to detect an operation amount of the electric actuator with respect to the connecting member, and a second sensor configured to detect a displacement amount of the release operation member. The control unit is configured to determine whether or not there is an intervention of the manual operation by the operator through the clutch operating element based on each detection result of the first sensor and the second sensor during an automatic control of the clutch device by the electric actuator.