Anti-locking and anti-wheelspin brake device with single distributor

A hydraulic brake device, capable of being actuated directly or automatically, and comprising at least:

• a master cylinder filled with a brake fluid dispensable at an outlet, and which is capable of being controlled by a brake pedal to constitute a first source of high hydraulic pressure,
• a pump having an inlet and an outlet, the pump capable of being controlled automatically to constitute a second source of high hydraulic pressure,
• a first pressure receiver adapted to use a high fluid pressure to effect the braking of a driven wheel,
• a second pressure receiver adapted to use a high fluid pressure to effect the braking of a non-driven wheel,
• a hydraulic system formed of a network of links comprising at least one low pressure link and links connecting the outlets of the sources of high pressure to the receivers,
• first and second electrovalves of the hydraulic system and associated with the first and second receivers respectively, each capable of being controlled to connect selectively the corresponding receiver to one of the low pressure link and one of the sources of high pressure, and
• a distributor of the hydraulic system which modifies the network of links in accordance with instructions received by this distributor, the distributor comprising a body having a bore and a slide valve movable in the bore in an axial direction between two extreme positions under the control of the pressure of at least one of the sources of high pressure, to connect selectively the outlet of the master cylinder and the inlet of the pump,
• characterized in that the slide valve is capable of moving in the bore between a neutral position and each of the two extreme positions located on either side of the neutral position, the slide valve movable toward the extreme positions, against respective first and second resilient forces, under the effect of a pressure rise in respective first and second chambers of the distributor connected to the respective outlets of the first and second sources of high pressure, and the slide valve, in a first extreme position, interrupts a link established for other positions of the slide valve between the outlet of the master cylinder and the inlet of the pump and the slide valve, in a second extreme position, interrupts a link established for other positions of the slide valve between the outlet of the master cylinder and the first receiver.