JPH0360153U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a piping system diagram of a hydraulic pressure control device for an anti-skid device according to a first embodiment of the present invention, FIGS. 2 to 4 are partial piping system diagrams showing first to third modifications, respectively, and FIG. 1 is a piping system diagram of a conventional hydraulic pressure control device for an anti-skid device. In the figure, 82, 84... diaphragm.

Claims (1)

[Claims for Utility Model Registration] (1) Disposed between the first hydraulic pressure generating chamber of the master cylinder and the wheel cylinder of one of a pair of front wheels, the brake hydraulic pressure of the wheel cylinder of the front wheel is A first hydraulic pressure control valve that controls the brake hydraulic pressure of the wheel cylinder of the other front wheel of the pair of front wheels, and is disposed between the second hydraulic pressure generating chamber of the master cylinder and the wheel cylinder of the other front wheel of the pair of front wheels. a second hydraulic pressure control valve to control; a control unit that evaluates the skid state of the wheel and issues a command to control the first and second hydraulic pressure control valves; via the first and second hydraulic pressure control valves; first and second hydraulic pumps that pressurize brake fluid discharged from the wheel cylinder of the front wheel and supply it to a pressure fluid supply pipe connecting the master cylinder and the first and second hydraulic pressure control valves; The brake fluid pressure is disposed between the wheel cylinders of both front wheels and the wheel cylinders of both rear wheels, and is controlled by the first and second hydraulic pressure control valves according to the lower pressure of the brake fluid pressures of the front wheels. a pressure selection means for outputting a pressure of the master cylinder; 1. A pair of pressure receiving parts that receive pressure from a master cylinder pressure chamber and a wheel cylinder pressure chamber that define the hydraulic pressure of the second hydraulic pressure generation chamber and the hydraulic pressure of the wheel cylinders of the pair of front wheels in opposing directions, respectively. A piston or a group of pistons that is normally in a neutral position with both valve parts open, but that can move in either of the opposite directions during control to selectively close either of the valve parts. When one piping system fails, the piston or piston group moves in one direction due to the differential pressure between the two hydraulic pressure generating chambers, and opens and closes the valve section of the other normal piping system. In a hydraulic pressure control device for an anti-skid device, the hydraulic pressure control device for an anti-skid device is configured to maintain both valve portions in an open state by forcibly maintaining them in an open state or by maintaining a normal neutral position,
A throttle is provided between the discharge ports of the first and second hydraulic pumps and the master cylinder, and a connection portion between each throttle and the master cylinder is connected to each master cylinder pressure chamber of the pressure selection means. 1. A hydraulic pressure control device for an anti-skid device, characterized in that it is provided with a conduit for (2) The hydraulic pressure for anti-skid device according to claim (1), wherein the throttle is provided between the discharge ports of the first and second hydraulic pumps and the master cylinder in each of the pressure liquid supply pipes. Control device.