Method and Apparatus for the Operation of a Parking Brake of a Motor Vehicle

摘要

A method for the operation a parking brake of a motor vehicle that comprises at least one wheel brake device, wherein the wheel brake device comprises an electric motor that can be activated for its actuation and that drives a spindle for the displacement of a brake piston between a clamping position and a release position, wherein for the calibration of the parking brake the electric motor is activated in order to move the brake piston into the release position in a first step and from the release position into the clamping position in a subsequent second step. It is provided that in the second step a power supply of the electric motor is interrupted during the displacement of the brake piston in a no-load phase (II) and at least one motor parameter of the electric motor is determined depending on a coasting behavior of the electric motor.

主权项

1. A method of operating a parking brake of a motor vehicle, the motor vehicle comprising at least one wheel brake device that includes an electric motor configured to actuate and drive a spindle to displace a brake piston between a clamping position and a release position, the method comprising:
operating the electric motor to move the brake piston into the release position, during a calibration of the parking brake; operating the electric motor to move the brake piston from the release position towards the clamping position, during the calibration of the parking brake; and as the brake piston moves from the release position towards the clamping position:
interrupting a power supply of the electric motor in a no-load phase; anddetermining at least one motor parameter of the electric motor based on a coasting behavior of the electric motor.