Patent ID: 9643586
Date: 2017-05-09
CPC Classifications: B60T,F16D

Claim:
1. A method for releasing an automatic parking brake, the automatic parking brake including an electric motor configured to produce an electromechanical clamping force, comprising: operating the electric motor to release the automatic parking brake; measuring, during the release of the automatic parking brake, a motor voltage and a motor current of the electric motor; estimating, during the release of the automatic parking brake, a distance traveled by the automatic parking brake since a start of the release of the automatic parking brake, a value for the estimated distance traveled being determined based on the measured motor voltage and the measured motor current; ending the release of the automatic parking brake by switching off the electric motor dependent on a comparison of the estimated distance traveled with a minimum total distance traveled; and ending the release of the automatic parking brake by switching off the electric motor dependent on an additional switch-off criterion that ensures that the minimum total distance traveled has been achieved.