초록 ▼

A hydraulic braking pressure control unit including three or more hydraulic pressure control components, and a holder structure which holds those hydraulic pressure control components, wherein the three or more hydraulic pressure control components are selected from electromagnetically operated hydr

A hydraulic braking pressure control unit including three or more hydraulic pressure control components, and a holder structure which holds those hydraulic pressure control components, wherein the three or more hydraulic pressure control components are selected from electromagnetically operated hydraulic pressure control valves capable of controlling a pressure of a working fluid in a brake cylinder in a braking system, and pressure detecting devices, to detect respective pressures of the fluid used to control the electromagnetically operated hydraulic pressure control valves. The three or more hydraulic pressure control components include three hydraulic pressure control components which are attached to the holder structure such that one of the three hydraulic pressure control components is spaced from the other two hydraulic pressure control components by substantially the same distance.

대표청구항 ▼

What is claimed is: 1. A hydraulic braking pressure control unit comprising: a plurality of electromagnetically operated hydraulic pressure control valves capable of controlling pressure of a working fluid in a plurality of brake cylinders; a power-operated hydraulic pressure source power-operable

What is claimed is: 1. A hydraulic braking pressure control unit comprising: a plurality of electromagnetically operated hydraulic pressure control valves capable of controlling pressure of a working fluid in a plurality of brake cylinders; a power-operated hydraulic pressure source power-operable to pressurize the working fluid, and including a pump device having a pump operable to pressurize the working fluid received from a low-pressure source and deliver the pressurized working fluid, and an accumulator for storing the pressurized working fluid delivered from the pump device; a master-cylinder pressure sensor operable to detect a pressure of the working fluid pressurized by a master cylinder; an accumulator pressure sensor operable to detect a pressure of the working fluid stored in said accumulator; and a holder structure which holds said plurality of electromagnetically operated hydraulic pressure control valves, wherein said plurality of electromagnetically hydraulic pressure control valves include four control valves having respective main body portions which are arranged along a straight line on one surface of said holder structure and which are four pressure-increasing control valves connected to said power-operated hydraulic pressure source and to the respective four brake cylinders or four pressure-reducing control valves connected to said low-pressure source and to said respective four brake cylinders, and said holder structure has a delivery passage which is connected to said power-operated hydraulic pressure source and through which the pressurized working fluid is delivered from said pump device, and at least one master-cylinder passage connected to the master cylinder manually operable to pressurize the working fluid, each of said pressure-source passage and said at least one master-cylinder passage being formed in said holder structure, so as to extend in a direction intersecting said straight line, between two adjacent ones of said plurality of control valves, as seen in a plane of said one surface, and further wherein said holder structure holds all of said plurality of electromagnetically operated hydraulic pressure control valves, said master-cylinder pressure sensor and said accumulator pressure sensor such that the main body portions of the electromagnetically operated hydraulic pressure control valves, master-cylinder pressure sensor and accumulator pressure sensor are attached to said one surface. 2. The hydraulic braking pressure control unit according to claim 1, wherein said at least one master-cylinder passage consists of two master-cylinder passages each of which is formed so as to extend between two adjacent ones of said plurality of control valves, as seen in said plane. 3. A hydraulic braking pressure control unit comprising: a power-operated hydraulic pressure source including a pump device having a pump operable to pressurize a working fluid received from a low-pressure source and deliver the pressurized working fluid, and an accumulator for storing the pressurized working fluid delivered from the pump device; a plurality of electromagnetically operated hydraulic pressure control valves capable of controlling pressures of the working fluid in respective brake cylinders, said plurality of electromagnetically operated hydraulic pressure control valves including a group of respective pressure-increasing control valves connected to said power-operated hydraulic pressure source and to the respective brake cylinders, and a group of pressure-reducing control valves connected to said low-pressure source and to said respective brake cylinders; a master-cylinder pressure sensor operable to detect a pressure of the working fluid pressurized by a master cylinder operable by an operator to pressurize the working fluid; an accumulator pressure sensor operable to detect a pressure of the working fluid stored in said accumulator; and a holder structure which holds said plurality of electromagnetically operated hydraulic pressure control valves such that main body portions of said plurality of electromagnetically operated hydraulic pressure control valves are arranged on one surface of said holder structure, said plurality of electromagnetically operated hydraulic control valves including a plurality of control valves the main body portions of which are arranged along a straight line, wherein said holder structure having at least one fluid passage which is formed in said holder structure such that each of said at least one fluid passage extends in a direction intersecting said straight line, between two adjacent ones of said plurality of control valves as seen in a plane of said one surface, said at least one fluid passage including a delivery passage through which said pressurized working fluid is delivered from said pump device, and wherein said holder structure holds all of said plurality of electromagnetically operated hydraulic pressure control valves, said master cylinder pressure sensor and said accumulator pressure sensor such that the main body portions of the electromagnetically operated hydraulic pressure control valves, master cylinder pressure sensor and accumulator pressure sensor are attached to said one surface. 4. A hydraulic braking control unit used for a braking system including a plurality of brake cylinders, a master cylinder manually operable to pressurize a working fluid, and a power-operated hydraulic pressure source including a pump device having a pump operable to pressurize the working fluid, and an accumulator for storing the working fluid pressurized by the pump, said hydraulic braking control unit comprising: a plurality of hydraulic control valves capable of controlling pressure of the working fluid in said plurality of brake cylinders; at least one master-cylinder pressure sensor operable to detect a pressure of the working fluid pressurized by said master cylinder; an accumulator pressure sensor operable to detect a pressure of the working fluid stored in said accumulator; and a holder structure which has at least one master-cylinder passage connecting said master cylinder to said at least one master-cylinder pressure sensor, and a pressure-source passage connecting said accumulator to said accumulator pressure sensor, and wherein said holder structure holds said plurality of hydraulic pressure control valves, said at least one master-cylinder pressure sensor and said accumulator pressure sensor such that the main body portions of the hydraulic pressure control valves, and main body portions of the at least one master-cylinder pressure sensor and accumulator pressure sensor are attached to one surface of the holder structure, said pressure-source passage being formed in said holder structure, so as to extend between two adjacent ones of said plurality of hydraulic control valves, as seen in a plane of said one surface. 5. A hydraulic braking pressure control unit according to claim 4, wherein each of said at least one master cylinder passage is formed in said holder structure, so as to extend between two adjacent ones of said plurality of hydraulic pressure control valves, as seen in a plane of said one surface.