A control device of a vehicle power transmission device including a first power transmission path transmitting power by engaging a first clutch, a sub-clutch and a second power transmission path transmitting power by engaging a second clutch each disposed between an engine and drive wheels and parallel to each other, the device including a fail-safe valve for preventing simultaneous engagement of the first and second clutches, the fail-safe valve configured to be switched to a fail-safe spool position preventing simultaneous engagement of the first and second clutches by a hydraulic pressure of a hydraulic fluid supplied to the first clutch or an output pressure of a first electromagnetic valve controlling the hydraulic pressure and the hydraulic pressure of the hydraulic fluid supplied to the second clutch or an output pressure of a second electromagnetic valve controlling the hydraulic pressure, the second electromagnetic valve configured to increase the output pressure.

A control apparatus for a vehicle drive-force transmitting apparatus including a dog clutch that is operated by an actuator to selectively connect and disconnect a drive-force transmitting path. In process of switching of the dog clutch from released state to engaged state, the control apparatus determines whether a rotational speed difference of the dog clutch is equal to or larger than a given difference value when a sleeve of the dog clutch is positioned on an engaging side of a synchronizing position for placing the dog clutch into the engaged state, and stops the switching of the dog clutch to the engaged state and causes the actuator to place the dog clutch back into the released state, when determining that the rotational speed difference is equal to or larger than the given difference value with the sleeve being positioned on the engaging side of the synchronizing position.

Systems and methods are provided for actuating a clutch of a manual transmission of a vehicle comprising. An automatic emergency braking (AEB) system is configured to automatically initiate an AEB event and a brake controller is configured to automatically actuate a braking system of the vehicle. A powertrain controller in is configured to monitor vehicle parameters and determine when an engine of the vehicle is nearing stall. A clutch control module is configured to actuate a clutch hydraulic master cylinder and actuate the clutch. A vehicle sensor network is configured to detect objects surrounding the vehicle. The AEB system is configured to initiate the AEB event based on detected objects surrounding the vehicle and, when the AEB event is initiated, instruct the brake controller to automatically actuate the braking system and instruct the clutch control module to actuate the clutch when the vehicle is nearing stall.

A dual clutch device includes a first piston applying a first clutch by a hydraulic pressure supplied into a first hydraulic pressure chamber and releasing the first clutch by a first spring, a second piston applying a second clutch by a hydraulic pressure supplied into a second hydraulic pressure chamber and releasing the second clutch by a second spring, a first supply line supplying a hydraulic pressure into the first hydraulic pressure chamber and a second hydraulic pressure canceling chamber, a second supply line supplying a hydraulic pressure into the second hydraulic pressure chamber and a first hydraulic pressure canceling chamber, a first valve allowing or cutting the supply of hydraulic pressure into the first hydraulic pressure chamber and the second hydraulic pressure canceling chamber, and a second valve allowing or cutting the supply of hydraulic pressure into the second hydraulic pressure chamber and the first hydraulic pressure canceling chamber.

The invention relates to a method for increasing the availability of a hybrid separating clutch in a hybrid drive train of a motor vehicle, wherein the hybrid separating clutch is disposed between an internal combustion engine and an electric traction drive. In the method where even in the event of a fault the motor vehicle continues to be driven, the hybrid separating clutch is controlled by a hydrostatic actuator, and when a malfunction of the hydrostatic actuator is detected, for actuation of the hybrid separating clutch which is engaged in the non-actuated state, the last state of the hydrostatic actuator detected by a control mechanism is used for estimation of a minimum clutch torque which can be transmitted.

A clutch controller provides protective disengagement of a clutch between an engine and driven machinery to prevent engine failure due to rapid onset overload. Sensor signals of measured parameters are used by the controller to determine potential engine failure. Multiple, successive sensor signals and elapsed times are assessed during which the current sensor signal value and the scaled rate of change in signal values is compared against a predefined amount. The clutch controller sends a clutch disengagement signal if a calculation result is indicative of imminent failure.

Systems and methods are provided for actuating a clutch of a manual transmission of a vehicle comprising. An automatic emergency braking (AEB) system is configured to automatically initiate an AEB event and a brake controller is configured to automatically actuate a braking system of the vehicle. A powertrain controller in is configured to monitor vehicle parameters and determine when an engine of the vehicle is nearing stall. A clutch control module is configured to actuate a clutch hydraulic master cylinder and actuate the clutch. A vehicle sensor network is configured to detect objects surrounding the vehicle. The AEB system is configured to initiate the AEB event based on detected objects surrounding the vehicle and, when the AEB event is initiated, instruct the brake controller to automatically actuate the braking system and instruct the clutch control module to actuate the clutch when the vehicle is nearing stall

A control device of a vehicle power transmission device including a first power transmission path transmitting power by engaging a first clutch, a sub-clutch and a second power transmission path transmitting power by engaging a second clutch each disposed between an engine and drive wheels and parallel to each other, the device including a fail-safe valve for preventing simultaneous engagement of the first and second clutches, the fail-safe valve configured to be switched to a fail-safe spool position preventing simultaneous engagement of the first and second clutches by a hydraulic pressure of a hydraulic fluid supplied to the first clutch or an output pressure of a first electromagnetic valve controlling the hydraulic pressure and the hydraulic pressure of the hydraulic fluid supplied to the second clutch or an output pressure of a second electromagnetic valve controlling the hydraulic pressure, the second electromagnetic valve configured to increase the output pressure.

The invention relates to a method for avoiding safety-critical activation of a clutch in a hybrid module of a drivetrain of a motor vehicle, wherein the hybrid module is effective between the internal combustion engine and the transmission and has an electric drive, the clutch and a freewheel, and the clutch is used to start the internal combustion engine by transmitting a torque, supplied by the electric drive or the drivetrain, by a frictionally locking connection to the electric drive or the drivetrain, or for disconnecting the internal combustion engine from the drivetrain for purely electric driving. In a method for avoiding safety-critical activation of a clutch in a hybrid module in which safety-critical driving situations are reliably prevented, a critical interference torque of the clutch is set as a function of ambient conditions of the motor vehicle and/or peripheral conditions of the vehicle, in order to set a safety distance to be maintained by the open clutch.

A dual clutch device includes a first piston applying a first clutch by a hydraulic pressure supplied into a first hydraulic pressure chamber and releasing the first clutch by a first spring, a second piston applying a second clutch by a hydraulic pressure supplied into a second hydraulic pressure chamber and releasing the second clutch by a second spring, a first supply line supplying a hydraulic pressure into the first hydraulic pressure chamber and a second hydraulic pressure canceling chamber, a second supply line supplying a hydraulic pressure into the second hydraulic pressure chamber and a first hydraulic pressure canceling chamber, a first valve allowing or cutting the supply of hydraulic pressure into the first hydraulic pressure chamber and the second hydraulic pressure canceling chamber, and a second valve allowing or cutting the supply of hydraulic pressure into the second hydraulic pressure chamber and the first hydraulic pressure canceling chamber.