Drive device for adjusting a vehicle assembly

A drive device configured to adjust a vehicle assembly, the drive device comprising:

• an electromotive adjustment drive configured to adjust a position of the vehicle assembly;
• and
• a control device configured to command the electromotive adjustment drive to operate in a number of modes including a holding mode, in which the electromotive adjustment drive is actuated to hold the position of the vehicle assembly, wherein the control device is further configured to,
• determine a correcting variable and regulate a current of the electromotive adjustment drive with reference to a specified setpoint value based on the correcting variable, wherein the control device is configured to determine the correcting variable as a voltage value and to set a motor voltage with reference to the voltage value by using a pulse width modulation,
• detect an adjustment request to adjust the position of the vehicle assembly, in response to a change of the correcting variable;
• wherein the control device is configured to monitor said correcting variable, to identify the adjustment request based on a comparison of the correcting variable and threshold value and to terminate the holding mode in case the adjustment request is identified.

A method of operating an electromotive adjustment drive configured to adjust a vehicle assembly between a number of positions, the method comprising:

• determining, by a control device, a correcting variable;
• regulating, by the control device, a current of the electromotive adjustment drive with reference to a specified setpoint value based on the correcting variable, wherein the control device determines the correcting variable as a voltage value and sets a motor voltage with reference to the voltage value by using a pulse width modulation;
• and
• detecting, by the control device, an adjustment request to adjust the position of the vehicle assembly, in response to a change of the correcting variable;
• wherein the control device is configured to monitor said correcting variable, to identify the adjustment request based on a comparison of the correcting variable and threshold value and to terminate a holding mode in case the adjustment request is identified.