The present disclosure relates to a clutch control apparatus, and more particularly, to a clutch control apparatus that achieves miniaturization of machinery and reduces an operational error by using a non-contact type displacement detection system using a position detecting sensor for a clutch clearance, and regulates the operation of an actuator using a plurality of solenoid valves, as a result, allowing accurate position control of a pneumatic cylinder which operates the clutch, thereby improving fuel efficiency and achieving fuel reduction as well as reducing emissions of carbon dioxide.

A vehicle system may include a controller configured to increase, after a specified delay, an engagement pressure of a torque converter clutch prior to occurrence of the event to a target pressure that is based on a regenerative braking torque estimate associated with the event such that a portion of energy associated with the event is converted to electricity. The controller may increase the engagement pressure in response to an accelerator pedal release and an expected regenerative braking event.

Variator (20) and forward clutch (Fwd/C) disposed in series are provided between engine (1) having starter motor (15) and driving wheel (7). Sailing stop control that, on the basis of satisfaction of sailing entering condition, interrupts power transmission by frictional engagement element (Fwd/C), stops engine (1) and performs coast-travel is performed. When sailing entering condition is satisfied, coast-travel is started with rotation stop timing of variator (20) being delayed with respect to rotation stop timing of engine (1). When accelerator pedal depression operation intervenes after start of coast-travel, engine (1) is restarted by starter motor (15). When judged that input and output rotation speeds of frictional engagement element (Fwd/C) become synchronization rotation speed after restart of engine (1), frictional engagement element (Fwd/C) is reengaged. Shift response from coast-travel to normal travel is therefore improved at change-of-mind at which sailing quitting condition is satisfied during progress of automatic stop of engine.

Embodiments of the present invention provide a motor vehicle controller comprising a computing device, the controller being configured to command a first releasable torque transmitting device of a drive-line to switch between a released condition in which a first releasable torque transmitting device substantially prevents transmission of torque from an input to an output portion thereof, and an engaged condition in which a releasable torque transmitting device allows torque transmission from an input portion to an output portion thereof. The controller may be configured to receive information indicative of: a speed of wheels of a first axle; a speed of wheels of a second axle; and a terrain over which a vehicle is driving. The controller may be configured, in response to a detected disparity between the speed of wheels of said first and second axle when said first releasable torque transmitting device is switched to said engaged condition, in dependence upon said received information indicative of the terrain over which the vehicle is travelling, either: output a signal to automatically cause said first releasable torque transmitting device to perform a reconnect operation comprising momentarily resuming the released condition, and then subsequently resuming the engaged condition, or maintain said first releasable torque transmitting device in said engaged position.

An apparatus and a method for controlling a coasting operation in a hybrid vehicle are provided. The apparatus includes: a coasting operation control mode entrance time point determination unit to determine a time point at which a subject vehicle enters a coasting operation control mode; a target vehicle speed reach time point calculation unit to calculate a target vehicle speed of the subject vehicle and a time point, at which the subject vehicle reaches the target vehicle speed, when the subject vehicle enters the coasting operation control mode; and a creep torque variation control unit to control creep torque of the subject vehicle using a difference between the target vehicle speed and a present vehicle speed of the subject vehicle.

A method for operating a vehicle drive-train having a continuously power-branched transmission with secondary coupling. In the open operating condition of reversing clutches of a reversing gear unit, torque applied in the area of a drive output can be supported by a range group in the area of a variator. In the event of a command to interrupt the power flow between a drive engine and the drive output, it is checked whether the vehicle is on an inclined surface and if the result of that inquiry is positive, the power flow between the drive engine and the transmission is interrupted at the latest when the rotational speed of the drive output is reduced to zero by opening the reversing clutches, while the active connection between the drive output and the variator is maintained by way of the range group.

An apparatus and a method for controlling a coasting operation in a hybrid vehicle are provided. The apparatus includes: a coasting operation control mode entrance time point determination unit to determine a time point at which a subject vehicle enters a coasting operation control mode; a target vehicle speed reach time point calculation unit to calculate a target vehicle speed of the subject vehicle and a time point, at which the subject vehicle reaches the target vehicle speed, when the subject vehicle enters the coasting operation control mode; and a creep torque variation control unit to control creep torque of the subject vehicle using a difference between the target vehicle speed and a present vehicle speed of the subject vehicle.

A vehicle system may include a controller configured to increase, after a specified delay, an engagement pressure of a torque converter clutch prior to occurrence of the event to a target pressure that is based on a regenerative braking torque estimate associated with the event such that a portion of energy associated with the event is converted to electricity. The controller may increase the engagement pressure in response to an accelerator pedal release and an expected regenerative braking event.

Provided is a control device for a hybrid vehicle including a controller that performs a control of the hybrid vehicle including an engine and an electric motor that serve as driving sources, a transmission, and first and second clutches. The first clutch is provided between the engine and the transmission. The second clutch is provided between the transmission and driving wheels. The controller includes first and second control units. The first control unit performs a control, in a motor traveling mode, to bring the first clutch to a disengaged state. The motor traveling mode includes traveling solely with the electric motor being driven. The second control unit performs a control, in the motor traveling mode, to bring the second clutch to a mildly engaged state in which input, from the driving-wheel side, of torque larger than driving torque causes the second clutch to slide.

A method for controlling a hydraulic pressure refilling operation for an engine clutch of a vehicle includes determining whether the vehicle travels using power of a driving motor with an engine clutch maintained in a disengaged state, and upon determining that the vehicle travels using power of the driving motor with the engine clutch maintained in the disengaged state, determining whether loss of hydraulic pressure has occurred, and upon determining that loss of hydraulic pressure has occurred, controlling a hydraulic pressure refilling operation such that working fluid in a reservoir is supplied to the actuator with the engine clutch in an engaged state, and controlling the driving motor so that the driving motor outputs a compensated torque by compensating for an effect of a load torque, generated by a non-operating engine, on a torque of the driving motor.