Hydraulic power brake system
AssigneeRobert Bosch Ghbh
InventorsAndreas Remmelmann, Hubertus Mies, Arne Weidemann, Dietmar Seubert
Life of this patent
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Abstract
The invention relates to a hydraulic power brake system comprising a manually operated brake valve (4) via which a pressure medium connection between a brake line (BR1, BR2) and a storage circuit (S1, S2) or a reservoir (T; 70) can be controlled to open. A pilot-controlled, continuously adjustable directional valve (16-22) is provided in the pressure medium flow path between a wheel brake cylinder (26-32) and the brake valve (4), said directional valve being controllable via two pilot valves (86, 90).
Claims16
A hydraulic power brake system comprising a manually actuated brake valve (4) via which it is possible to control open a pressure medium connection between at least one brake line (62, 64, 66, 68), which has a pressure medium connection to a wheel brake cylinder (26, 28, 30, 32), and a hydraulic accumulator (6, 8) or a tank (70), wherein
- a pilot-controlled, continuously adjustable directional control valve (16, 18, 20, 22) is located in the pressure medium flow path between the wheel brake cylinder (26, 28, 30, 32) and the brake valve (4), and includes a brake port that is connected to the brake line (62, 64, 66, 68), a tank port (T), and a pressure port (P) that is connected to an output port (BR1, BR2) of the brake valve (4), and which is preloaded into a home position, and which is acted upon, in one direction, by a control pressure that acts on one control surface, and, in the other direction, is acted upon by a pressure in the brake line (62, 64, 66, 68) that acts on another control surface, it being possible to change the control pressure via pilot valve elements (86, 90) using an antilock braking system control unit (14).
Dependencies are inferred from the claim text.