| 摘要 |
PROBLEM TO BE SOLVED: To continue a braking force control by a brake-by-wire even in a decreasing situation of a power supply voltage for controlling a pressure control device. SOLUTION: This brake control device has solenoid opening/closing valves 50FL to 50RR and 60FL to 60RR for controlling the pressure of a working fluid supplied from high pressure liquid supply sources 36 and 38 to wheel cylinders 22FL to 22RR. The solenoid valves of a left front wheel and a right back wheel are controlled by a first control device 76, the solenoid valves of a right front wheel and a left back wheel are controlled by a second control device 84, and the respective control devices have a first power supply 82 and a second power supply 90 for driving the corresponding solenoid valves or the like. It is determined whether a decrease of the power supply voltage may disturb a normal and continuous braking force control by one control device (S20 to 40, 50 to 80). When the voltage may disturb it, solenoid opening/closing valves 64F and 64R are opened to interconnect right and left wheel cylinders, and the other control device (S120 to 250, 320 to 380) controls pressure in the corresponding wheel cylinder.
|
