| 摘要 |
To prevent loss of brake fluid in a closed brake fluid circuit including an automatic brake anti-lock system having an automatic brake anti-lock evaluation stage (ABS), and brake fluid control valves (9-12; 40-42) controllable by the ABS stage for pressure build-up, pressure maintenance, and pressure drop, respectively, a feed valve (15, 43) is provided coupled to a source (6, 8) of pressurized brake fluid, preferably to a pilot valve which is operated by the operator brake pedal in a pilot valve chamber (6), the feed valve being hydraulically operatively connected to the pressure inlet connections of the control valve means, the feed valve being electrically connected to the ABS evaluation stage and operated, upon energization thereof, to supply pressurized brake fluid when the ABS unit responds, indicative of skidding or incipient locking of a brake. A hydraulic choke (15a, 43a) is interposed in the connection between the feed valve and the respective control valves (9-12; 40-42). To maintain separation of braking circuits (I, II), a distributor unit with check valves is provided so that pressurized brake fluid is separately fed to the respective brake circuits.
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