Patent ID: 6969127
Filing Date: 2005-11-29
Classification: B60T,F16D

Abstract:
1. A parking brake system for applying braking force to wheels of a vehicle, the parking brake system including at least two independent brake system sections, each associated with one of the wheels, each of the brake system sections comprising: a motor; a parking brake, driven by the motor, for applying braking force to the associated wheel; a detector for detecting an operation state of the parking brake; and a controller for determining a drive command that is to be output to the motor in accordance with the operation state detected by the detector, the controller detecting the operation state of the parking brake in the other brake system section through the detector of the other brake system section, assuming the drive command that is to be output from the controller of the other brake system section, detecting the drive command actually output from the controller of the other brake system section, and comparing the actually detected drive command with the assumed drive command to determine abnormality of the other brake system section, wherein the controller determines that the other brake system section is abnormal when the detected drive command does not match the assumed drive command.