Patent ID: 9239579
Filing Date: 2016-01-19
CPC Classification: G05B

Claim Text:
1. A method for ascertaining an actuating position of a vehicle part that is moveable by an electric actuating motor via an actuating mechanism, the method comprising: ascertaining an angle of rotation correlating a number of motor shaft rotations during an actuation process or a motor signal correlated therewith during the actuation process; deriving an actuating position measure for the actuating position of the vehicle part from the angle of rotation or the motor signal correlating therewith, compensating an unloaded angle of rotation, through which the motor shaft rotates during an initial no-load phase of the actuation process without motion of the vehicle part via a predetermined correction term; and changing the correction term according to a stored dependency on a characteristic quantity for the age of the actuating mechanism, wherein the correction term is increased linearly as a function of the characteristic quantity for the age of the actuating mechanism until a predetermined maximum value is reached and once the predetermined maximum value is reached, the corrective term is held at a value that is independent of the age of the actuating mechanism.