| 摘要 |
This invention relates to a hydraulic brake system for automotive vehicle with a master cylinder (2) and with a hydraulic power booster (1) connected upstream of the master cylinder (2) and having a pressure chamber (4) in which an auxiliary pressure depending on the actuating force (F) may be modulated via a pedal-operable brake valve (7). Wheel brakes (51, 53) of a first brake circuit are connected at the pressure chamber (4), wheel brakes (50, 52) of a second brake circuit being connected at the master cylinder (2). The braking pressure active in the wheel brakes (50 through 53) is controllable by valve members (39, 54 through 59) controllable in dependence on the slip. In case of control, a hydraulic communication will be established between the pressure chamber (4) of a hydraulic power booster (1) and the master cylinder. It is suggested to provide a valve device (49) which in case of control may be switched over and by means of which two wheel brakes (52, 53) of one axle may be connected with each other. The wheel brakes of one brake circuit each are arranged at the vehicle so as to diagonally oppose each other. By using such means a hydraulic brake system is realizable which in the case of normal brake actions has a diagonal brake circuit allotment and in which in case of control caused by slip detection two wheel brakes (52, 53) of one vehicle axle are connected with each other, the brake system thus working with a Y-brake circuit allotment during brake slip control.
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