Patent ID: 6805415
Filing Date: 2004-10-19
Classification: B60T

Abstract:
A brake device having a fluid pressure source which generates a fluid pressure based on an operation of a brake operating member, the brake device comprising:a brake operating amount detector which detects an operating amount of the brake operating member, a fluid source pressure detector which detects the pressure generated in the fluid pressure source, and a failure detector which detects and distinguishes between different types of failures of the brake device based on the pressure detected by the fluid source pressure detector and the operating amount detected by the brake operating amount detector, wherein the failure detector detects and distinguishes the types of the failures between: (i) a case in which the pressure detected by the fluid source pressure detector at a time when the detected operating amount is a first predetermined amount of operation is smaller than a first predetermined pressure, the first predetermined amount of operation is smaller than a second predetermined amount of operation and the first predetermined pressure is larger than a second predetermined pressure, (ii) a case in which the pressure detected by the fluid source pressure detector at the time when the detected operating amount is the first predetermined amount of operation is larger than the first predetermined pressure, and (iii) a case in which the pressure detected by the fluid source pressure detector at a time when the operating amount detected by the brake operating amount detector is the second predetermined amount of operation is larger than the second predetermined pressure.