| 摘要 |
A brake system for automotive vehicles, comprising a tandem master cylinder (1) and a vacuum brake force booster (2). A pump (34) is connected to the supply chambers (10, 11) of the tandem master cylinder (1), which pump is actuated by an electromotor (35) started by a brake slip control device to replenish, in the brake slip control, the pressure fluid volume discharged from the working chambers (4, 5) of the tandem master brake cylinder (1), by way of the supply chambers (10, 11) and the sleeves of the master cylinder pistons (6, 7). To control the pump pressure, a pressure control valve (36) is provided to the control chamber (37) of which a control pressure is applied, which is generated in a control chamber (23) by a control piston (24) coupled ahead of the tandem master brake cylinder (1). The control chamber (23), by way of a magnetic valve (39), is pressure-relieved when the brake slip control device is turned off.
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