Method for determining a kisspoint of a clutch. A method is provided of determining a kisspoint of a clutch in a driveline of a vehicle comprising a. increasing a target clutch pressure of a clutch piston up to a first predetermined test target pressure, b. increasing the target clutch pressure up to an upper target pressure and subsequently keeping the target clutch pressure stable for a predetermined time interval, c. monitoring a parameter indicative for the filling of the clutch piston, e.g. the rotational speed of a pump, during the predetermined time interval, d. repeating steps a., b., and c. for at least one further predetermined test target pressure, and e. determining the kisspoint based on the monitored parameter indicative for the filling of the clutch piston.

Method for determining a kisspoint of a clutch. A method is provided of determining a kisspoint of a clutch in a driveline of a vehicle comprising a. increasing a target clutch pressure of a clutch piston up to a first predetermined test target pressure, b. increasing the target clutch pressure up to an upper target pressure and subsequently keeping the target clutch pressure stable for a predetermined time interval, c. monitoring a parameter indicative for the filling of the clutch piston, e.g. the rotational speed of a pump, during the predetermined time interval, d. repeating steps a., b., and c. for at least one further predetermined test target pressure, and e. determining the kisspoint based on the monitored parameter indicative for the filling of the clutch piston.

A method for determining an engagement point (X) of a clutch (3). The clutch (3) has first and second clutch sides (3a, 3b), which are rotationally decoupled when the clutch (3) is disengaged/open and which are rotationally coupled when the clutch (3) is engaged/closed. The method includes the steps of disengaging the clutch (3) and then engaging the clutch (3), in order to determine the engagement point (X). During this, the first clutch side (3a) is driven in rotation and the second clutch side (3b) is accelerated, for at least part of the time, by an acceleration device (4). A control device actuates the clutch (3) in order determine the engagement point (X) of the clutch (3), and a computer program product with stored commands, brings about the sequence of the method when the program is operated on a suitable control unit.

A hybrid electric vehicle (HEV) includes an engine, a first motor directly connected to the engine through a first shaft, a second motor directly connected to a second shaft, and an engine clutch of which one end is connected to the first shaft and the other end is connected to the second shaft so as to selectively connect the first shaft and the second shaft. The (HEV) includes a first controller unit configured to control each of the first motor and the second motor and a second controller unit configured to determine whether a preconfigured touch point learning condition is satisfied, control the first and second motors to respective first and second speeds when the learning condition is satisfied, and learn a touch point of the engine clutch on the basis of a torque change of the first motor or the second motor.

A clutch control method of the vehicle provided with the double clutch transmission may include determining, by the controller, whether a vehicle is travelling at the lowest shifting stage or the highest shifting stage and the pre-engagement of a proximate shifting stage is completed or not; storing a learned driveshaft clutch torque and a current clutch temperature and initiating a timer when it is determined that the learned driveshaft clutch torque is considered reliable by the controller learning the driveshaft clutch torque; determining, by the controller, a plurality of conditions including the passage of time to determine whether a touch point learning of the non-driveshaft clutch is necessary or not; and disengaging, by the controller, the proximate shifting stage of the non-driveshaft to neutral when it is determined that the touch point learning is necessary and performing the touch point learning of non-driveshaft.

A clutch control method of the vehicle provided with the double clutch transmission may include determining, by the controller, whether a vehicle is travelling at the lowest shifting stage or the highest shifting stage and the pre-engagement of a proximate shifting stage is completed or not; storing a learned driveshaft clutch torque and a current clutch temperature and initiating a timer when it is determined that the learned driveshaft clutch torque is considered reliable by the controller learning the driveshaft clutch torque; determining, by the controller, a plurality of conditions including the passage of time to determine whether a touch point learning of the non-driveshaft clutch is necessary or not; and disengaging, by the controller, the proximate shifting stage of the non-driveshaft to neutral when it is determined that the touch point learning is necessary and performing the touch point learning of non-driveshaft.

The present disclosure provides a touch point learning apparatus for a clutch including: a clutch plate connected to an input shaft; a clutch disc connected to an output shaft; a hydraulic pressure chamber to which a working hydraulic pressure is applied, wherein the working hydraulic pressure is capable of engaging or disengaging the clutch plate and the clutch disc; and a controller configured to determine the engaging or disengaging of the clutch plate and the clutch disc based on a change in the working hydraulic pressure.

The present disclosure provides a touch point learning apparatus for a clutch including: a clutch plate connected to an input shaft; a clutch disc connected to an output shaft; a hydraulic pressure chamber to which a working hydraulic pressure is applied, wherein the working hydraulic pressure is capable of engaging or disengaging the clutch plate and the clutch disc; and a controller configured to determine the engaging or disengaging of the clutch plate and the clutch disc based on a change in the working hydraulic pressure.

A method for learning an engine clutch kiss point of a hybrid vehicle includes: controlling, by a controller, an engine clutch which connects an engine with a motor or disconnects the engine from the motor so that the engine clutch is engaged after the controller checks stop of the engine and of the motor and stabilization operation for a hydraulic pressure line of the engine clutch is performed; controlling the motor to have a certain speed after the stabilization operation; controlling the engine clutch to be engaged after speed of the motor is stabilized; determining whether torque variation of the motor when the engine clutch is engaged is equal to or greater than a threshold value; and determining a hydraulic pressure at which the torque variation is the threshold value as the kiss point of the engine clutch.

A method for learning an engine clutch kiss point of a hybrid vehicle includes: controlling, by a controller, an engine clutch which connects an engine with a motor or disconnects the engine from the motor so that the engine clutch is engaged after the controller checks stop of the engine and of the motor and stabilization operation for a hydraulic pressure line of the engine clutch is performed; controlling the motor to have a certain speed after the stabilization operation; controlling the engine clutch to be engaged after speed of the motor is stabilized; determining whether torque variation of the motor when the engine clutch is engaged is equal to or greater than a threshold value; and determining a hydraulic pressure at which the torque variation is the threshold value as the kiss point of the engine clutch.