Brake pressure controller for a hydraulic vehicle brake system

Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal

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Details

3031154, 3031161, 3031191, 303 841, 303901, B60T 834, B60T 842, B60T 848

Patent

active

055472664

ABSTRACT:
A brake pressure controller for a hydraulic vehicle brake system includes a master brake cylinder (1), a wheel brake cylinder (10, 11) connected thereto through a brake conduit (5), and a branch conduit (8, 9) which is provided in the brake conduit (5) between the master brake cylinder (1) and the wheel brake cylinder (10, 11). The brake system includes control valves (12, 14) and a pump (16) returning pressure fluid from a return conduit (15) into the brake conduit (5). At least one valve (6) is provided between the master brake cylinder (1) and the branch conduit (8, 9), which valve, in a first mode of operation, connects the outlet (17) of the pump (16) to the master brake cylinder (1) and, in a second mode of operation, discontinues the connection from the outlet (17) of the pump (16) to the master brake cylinder (1) and connects the inlet (24) of the pump (16) to the master brake cylinder (1) or a reservoir (4). The inlet (24) of the pump (16) includes a pressure holding valve (20), the opening pressure of which, in the first mode of operation, is above atmospheric pressure and, in the second mode of operation, is reduced to permit an automatic intake of pressure fluid to the pump (16).

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