Patent ID: 7753456

Claim:
A vehicle brake hydraulic pressure control unit comprising a base unit, comprising: a pair of regulator valves which are interposed between a pair of output ports provided on a tandem master cylinder and a pair of hydraulic pressure lines corresponding to the respective pair of output ports, respectively, four normally open electromagnetic valves which are interposed between four road wheel brakes, which correspond to both the output ports with two corresponding to each port, and both the hydraulic pressure lines in such a manner as to correspond to the four road wheel brakes, respectively; a pair of reservoirs which correspond to both the output ports, respectively; four normally closed electromagnetic valves which are interposed between both the reservoirs and the four road wheel brakes, respectively, in such a manner as to correspond to each one of the reservoirs and each of two of the four road wheel brakes; a pair of pumps which pump brake fluid from both the reservoirs to pressurize the brake fluid so pumped for outputting to both the hydraulic pressure lines; and a pair of suction valves which are interposed between both the output ports and suction sides of both the pumps, respectively, wherein the normally open electromagnetic valves and the normally closed electromagnetic valves are arranged in parallel with each other, wherein four ports, which connect to the four road wheel brakes, respectively, are provided on one external surface of the base unit in such a manner as to be aligned in parallel with a direction in which the normally open electromagnetic valves and the normally closed electromagnetic valves are arranged in parallel with each other, and wherein valves comprising only both the suction valves are arranged collectively to lie between the normally open electromagnetic valves and the normally closed electromagnetic valves which are arranged in parallel with each other, and are arranged individually to lie between each set of two ports from each end of the aligned four ports.