A system for controlling a clutch in a heavy vehicle including an internal combustion engine and an automated mechanical transmission, where the engine is running, the clutch is engaged and the transmission is in neutral, including an electronic control unit adapted to receive a request to shut down the engine, to disengage the clutch of the transmission, and to shut down the engine, where the electronic control unit is adapted to reengage the clutch when the rotation of the engine and the rotation of the transmission input shaft is zero, and to actively slow down rotation of the transmission input shaft by the use of a brake device if the stop time for the transmission input shaft exceeds a predefined time interval. The advantage of the invention is that vibrations and noise are reduced during shut down of the engine.

The present disclosure provides a clutch control method, including: a variation setting step of setting, by a controller, a current torque variation depending on a difference between a just previous clutch control torque and a clutch target torque; a limit determining step of determining whether a jerk of a clutch control torque need not be limited when the clutch control torque is reduced and then is increased or when the clutch control torque is continuously reduced by using the current torque variation and a just previous torque variation; a direction setting step and a limit setting step to determine a final torque variation based on the outcome of the limit determining step; and a control torque calculating step of calculating the clutch control torque to control a clutch.

The invention relates to a sensor unit for determining a rotor position of an electric motor, including at least one magnetic field sensor attached to a carrier element. In the case of a sensor unit, in which the sensor system can be easily exchanged, the carrier element is positioned in a sensor system housing which is open on one side and in which a sensing area of the at least one magnetic field sensor is directed in the direction of the open side of the sensor system housing.

Controlling a clutch by means of an actuator, wherein at least one first shaft can be torque-transmittingly connected to a second shaft by means of the clutch, the clutch in one of at least three states, where in an disengaged first state, a torque cannot be transmitted, in a second state, a torque can be transmitted such that the speeds of the first shaft and the second shaft are synchronized in the second state, and in an engaged third state, a required torque can be transmitted; wherein, in various states and in an operating mode associated with the particular state, the actuator is adjusted at a different speed in order to adjust the clutch.

A method of operating a vehicle drivetrain for rocking the vehicle free. The drivetrain has a transmission with an input and an output that can be coupled by a clutch. The input and output are connected to a drive aggregate and a drive output, respectively. The clutch is actuated based on driver actuation of an accelerator and a rotational speed of the drive output such that following accelerator actuation, when its actuation decreases, the clutch disengages with a first opening gradient. Then, based on a calculated point in time at which drive aggregate torque upon the clutch corresponds to torque on the clutch from the drive output, the clutch disengages with a second, smaller opening gradient. And depending on a rotational speed of the drive output relative to a limit value, the clutch either initiates or terminates engagement with a first closing gradient.

Controlling a clutch by means of an actuator, wherein at least one first shaft can be torque-transmittingly connected to a second shaft by means of the clutch, the clutch in one of at least three states, where in an disengaged first state, a torque cannot be transmitted, in a second state, a torque can be transmitted such that the speeds of the first shaft and the second shaft are synchronized in the second state, and in an engaged third state, a required torque can be transmitted; wherein, in various states and in an operating mode associated with the particular state, the actuator is adjusted at a different speed in order to adjust the clutch.

A method of operating a vehicle drivetrain for rocking the vehicle free. The drivetrain has a transmission with an input and an output that can be coupled by a clutch. The input and output are connected to a drive aggregate and a drive output, respectively. The clutch is actuated based on driver actuation of an accelerator and a rotational speed of the drive output such that following accelerator actuation, when its actuation decreases, the clutch disengages with a first opening gradient. Then, based on a calculated point in time at which drive aggregate torque upon the clutch corresponds to torque on the clutch from the drive output, the clutch disengages with a second, smaller opening gradient. And depending on a rotational speed of the drive output relative to a limit value, the clutch either initiates or terminates engagement with a first closing gradient.

The disclosure relates to a method for controlling an actuator or an actuator device, at least comprising a clutch and an actuator, which actuator has: an electric drive motor and a control device; a ramp mechanism, which comprises a rotatable first disk, which has first ramps, a second disk, which can be moved only in an axial direction and which has second ramps, and balls, which are arranged between the disks in the first ramps and second ramps; and at least one spring for moving the second disk in the axial direction. The dynamics of the electric drive motor are reduced by the control device at least in dependence on at least the determined preloading force or the first play in such a way that, during braking, the pin contacts only one side surface or that, in the event of a reversal of the rotational motion, the pin bridges the first play at a reduced first rotational speed of the drive motor and comes into contact with the other side surface and only then does an increase to a second rotational speed occur.

The invention relates to a sensor unit for determining a rotor position of an electric motor, including at least one magnetic field sensor attached to a carrier element. In the case of a sensor unit, in which the sensor system can be easily exchanged, the carrier element is positioned in a sensor system housing which is open on one side and in which a sensing area of the at least one magnetic field sensor is directed in the direction of the open side of the sensor system housing.

The disclosure relates to a method for controlling an actuator or an actuator device, at least comprising a clutch and an actuator, which actuator has: an electric drive motor and a control device; a ramp mechanism, which comprises a rotatable first disk, which has first ramps, a second disk, which can be moved only in an axial direction and which has second ramps, and balls, which are arranged between the disks in the first ramps and second ramps; and at least one spring for moving the second disk in the axial direction. The dynamics of the electric drive motor are reduced by the control device at least in depednece on at least the determined preloading force or the first play in such a way that, during braking, the pin contacts only one side surface or that, in the event of a reversal of the rotational motion, the pin bridges the first play at a reduced first rotational speed of the drive motor and comes into contact with the other side surface and only then does an increase to a second rotational speed occur.