Patent ID: 7204566
Filing Date: 2007-04-17
Classification: B60T,F15B,Y10S

Abstract:
1. A hydraulic braking pressure control unit comprising: a power-operated hydraulic pressure source including (a) a pump device having a pump operable to pressurize a working fluid received from a low-pressure source and deliver the pressurized fluid, and an electric motor operable to drive said pump, and (b) an accumulator for storing the pressurized fluid delivered from said pump device; a control valve device including a plurality of control valves capable of controlling a pressure of the working fluid in a brake cylinder, by utilizing the pressurized fluid delivered from said power-operated hydraulic pressure source, said plurality of control valves including a pressure-increasing control valve disposed in a passage connecting said accumulator and said brake cylinder, and a pressure-reducing control valve disposed in a passage connecting said brake cylinder and said low-pressure source; and a holder structure which has a first portion and a second portion respectively having a first surface and a second surface which are parallel and opposed to each other, said holder structure holding said power-operated hydraulic pressure source and said control valve device such that a main body portion of each of said plurality of control valves is attached to said first portion such that the axes of said control valves are substantially perpendicular to said first surface, while main body portions of said accumulator and said electric motor are attached to said second portion such that axes of said electric motor and said accumulator are substantially perpendicular to said second surface, and such that a first row in which said pressure-increasing and pressure-reducing control valves are arranged and a second row in which said accumulator and said electric motor are arranged are substantially parallel to each other.