Gkn Automotive Gmbh

Andreas Langhanki

Volker Rene Ruiters

Rainer Brüning

Markus Weller

Erik Resvoll

Mark Zimmermann

Khac Anh Phan

The disclosure relates to a method for calibrating a drive system for an axle of a motor vehicle; wherein the drive system includes at least one electric machine as the drive unit, a drive shaft driven by the drive unit, a first output shaft and a second output shaft, as well as a first clutch connecting the drive shaft to the first output shaft and a second clutch connecting the drive shaft to the second output shaft.

Calibrating a drive system for an axle of a motor vehicle

A method for controlling an actuator of an actuator unit of a motor vehicle includes detecting desired activation of the actuator, detecting whether a currently present operating state of the motor vehicle is a first operating state or a second operating state, selecting either a first control routine upon detecting the first operating state or a second control routine upon detecting the second operating state, and actuating the drive motor with the selected first control routine or second control routine. A drive motor of the actuator unit is controlled depending on the operating state of the motor vehicle. In the first operating state, an actuation of the actuator occurs according to the first control routine with high dynamics of the drive motor, and in the second operating state, the actuation of the actuator occurs according to the second control routine with adjusted dynamics of the drive motor.

Controlling an actuator of an actuator unit of a motor vehicle

Setting a system pressure for a hydraulically actuated clutch comprises

Adjusting the system pressure for a clutch

Controlling a multiplate clutch situated between an input shaft and an output shaft for the switchable transmission of torques, wherein in the event of a torque request and a subsequent engagement of the multiplate clutch, includes:

Method for actuating a multi-plate clutch

A clutch cylinder in a hydraulic pressure system can be charged with a controlled rotational speed of a pump to deliver hydraulic fluid into the clutch cylinder until a biting point of the clutch is reached and exceeded and a motor current of the pump has attained a predetermined minimum value. On the basis of a profile of the controlled rotational speed, a first volume of the hydraulic fluid delivered into the clutch cylinder by the pump up is determined until the minimum value is attained. The value of the first volume can be reduced by a predetermined amount to a second volume, which can be used for clutch processes during vehicle operation, wherein the second volume is delivered into the clutch cylinder, with a high rotational speed of the pump, such that the clutch is filled such that the biting point of the clutch is not quite reached.

Operating a clutch in a motor vehicle

Actual pressure of a hydraulic clutch of a motor vehicle can be regulated by: a) providing a value for a desired pressure to be present in a clutch cylinder; b) filling the clutch cylinder with hydraulic fluid to achieve the desired pressure; c) wherein, if the desired pressure lies between 0 and 7 bar, the actual pressure in the clutch cylinder is adjusted by regulating a rotational speed of the pump of the electric motor, and if the desired pressure is greater than 7 bar, the actual pressure in the clutch cylinder is adjusted by regulating a motor current of the electric motor; d) regulating the actual pressure until the desired pressure is achieved.

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Duisburg, Germany

Andreas Langhanki