| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a fail-safe control effectively and inexpensively, when the power voltage of a brake device drops. <P>SOLUTION: A brake ECU 200 adjusts feed amount of an operation fluid discharged from pumps 32-38 to wheel cylinders 20 while blocking the feed of the operation fluid from the pumps 32, 36 to a master cylinder 14, by driving motors 40, 42 while closing on-off valves 28, 30 and adjusting the opening of regulating valves 46-54 in a normal brake control condition. Meanwhile, the brake ECU 200 drives the motors 40, 42 to permit a part of the operation fluid discharged from the pumps 32, 36 to be fed to the master cylinder 14 even in a low voltage state where the power voltage is lower than the minimum operation voltage of the on-off valves 28, 30. <P>COPYRIGHT: (C)2011,JPO&INPIT |
