Clutch temperature management in a slip control method and arrangement for a drivetrain including a continuously variable transmission is described herein. The drivetrain includes a clutch that is so controlled as to slip when a torque higher than the usable torque attempts to pass through. The temperature data from the clutch is used to determine the usable torque. Accordingly, the clutch prevents the prime mover from stalling.

A method for operating a clutch of a drivetrain for a motor vehicle, in which at least one micro-slip of the clutch is adjusted in a targeted manner by means of an electronic computing device of the drivetrain, whereby the clutch is operated with the micro-slip during at least one operating phase, wherein an overpressing of the clutch is adjusted in a targeted manner by means of the electronic computing device), whereby the clutch is operated slip-free during at least one second operating phase that is different from the at least one operating phase.

The disclosure is concerned with control system and control method, for a vehicle including a driving power source, drive wheels, a first clutch, and a second clutch. An electronic control unit, which is included in the control system, places the first clutch in a half-engaged state with a predetermined clutch torque capacity, when the vehicle is started, performs start control in a first mode using the second clutch, by gradually increasing a clutch torque capacity of the second clutch from a released state, and switches the start control from the first mode using the second clutch to a second mode using the first clutch, when the increased clutch torque capacity of the second clutch reaches the clutch torque capacity of the first clutch.

A method and apparatus for correcting a physical slip and wear coefficient of a clutch comprising obtaining a torque difference according to a positional relation between an engine and the clutch; obtaining a correction weight value corresponding to an engine torque according to the torque difference; and correcting the physical slip and wear coefficient according to the correction weight value and a running-in state of the clutch. The method relates to obtaining a torque difference in real time by means of a positional relation between the engine and the clutch in a manner corresponding to the positional relation, obtaining a correction weight value corresponding to the engine torque according to the torque difference, and further correcting the physical slip and wear coefficient by combining the correction weight value and a running-in state of the clutch.

The disclosure is concerned with control system and control method, for a vehicle including a driving power source, drive wheels, a first clutch, and a second clutch. An electronic control unit, which is included in the control system, places the first clutch in a half-engaged state with a predetermined clutch torque capacity, when the vehicle is started, performs start control in a first mode using the second clutch, by gradually increasing a clutch torque capacity of the second clutch from a released state, and switches the start control from the first mode using the second clutch to a second mode using the first clutch, when the increased clutch torque capacity of the second clutch reaches the clutch torque capacity of the first clutch.

A method and apparatus for correcting a physical slip and wear coefficient of a clutch comprising obtaining a torque difference according to a positional relation between an engine and the clutch; obtaining a correction weight value corresponding to an engine torque according to the torque difference; and correcting the physical slip and wear coefficient according to the correction weight value and a running-in state of the clutch. The method relates to obtaining a torque difference in real time by means of a positional relation between the engine and the clutch in a manner corresponding to the positional relation, obtaining a correction weight value corresponding to the engine torque according to the torque difference, and further correcting the physical slip and wear coefficient by combining the correction weight value and a running-in state of the clutch.

A system and method for controlling engine clutch slip for a hybrid vehicle, in which it is determined whether an engine clutch has entered a slip mode and lubrication of the engine clutch is easily achieved through an additional lubrication hydraulic pressure circuit whenever the engine clutch enters the slip mode, thereby achieving the engine clutch slip control in all shift ranges including low-speed and medium-speed ranges and maintaining the heat energy that is generated from the engine clutch at a predetermined level or lower.

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.

The invention relates to a method for carrying out a starting operation of a motor vehicle having a gear train that includes a dual clutch transmission with a first clutch that carries the odd-numbered gears, and a second clutch that carries the even-numbered gears, wherein the second clutch of the dual clutch transmission is used, at least in part, for preloading the gear train.

A system and method for controlling engine clutch slip for a hybrid vehicle, in which it is determined whether an engine clutch has entered a slip mode and lubrication of the engine clutch is easily achieved through an additional lubrication hydraulic pressure circuit whenever the engine clutch enters the slip mode, thereby achieving the engine clutch slip control in all shift ranges including low-speed and medium-speed ranges and maintaining the heat energy that is generated from the engine clutch at a predetermined level or lower.