| 摘要 |
PROBLEM TO BE SOLVED: To restrain sound vibration caused by vibration generated from a motor when operating a pump, in a brake liquid pressure control device. SOLUTION: This brake liquid pressure control device includes two sets of independently drivable rotational driving type pump motors installed in a housing so that rotary shafts mutually become the same direction, two sets of pumps arranged in the housing and driven by the respective pump motors, and a control unit installed in the housing and capable of rotatingly driving the respective pump motors for pressurizing a plurality of wheel cylinders arranged in a vehicle by pressurizing a brake liquid. The control unit rotatingly drives the respective pump motors based on a command value arithmetically operated in response to brake operation of a driver, and mutually reversely rotates the respective motors when request liquid pressure to the wheel cylinders is higher than preset liquid pressure, and pressurizes the wheel cylinders by rotating one of the rotational driving type pump motors when the request liquid pressure is lower. COPYRIGHT: (C)2011,JPO&INPIT |
