Patent ID: 8930110
Filing Date: 2015-01-06
Classification: B60T

Abstract:
1. A method for re-tensioning an automatic parking brake by an electric motor, comprising: starting a re-tensioning process at a predefined time after the tensioning of the parking brake, the electric motor being configured to drive a parking brake mechanism in the tensioning direction; determining the travel carried out by the parking brake mechanism in the tensioning direction and the clamping force exerted by the parking brake during the re-tensioning; and not carrying out a further re-tensioning process if the travel carried out by the parking brake mechanism during the re-tensioning is greater than a first threshold value or the clamping force exerted by the parking brake in an initial phase of the re-tensioning process is greater than a second threshold value, or carrying out a further re-tensioning process after a predefined time if the travel carried out by the parking brake mechanism during the re-tensioning is less than a third threshold value and the initial clamping force of the parking brake is less than a fourth threshold value.