Hydraulic brake device having an anti-skid system

摘要

PCT No. PCT/DE93/00802 Sec. 371 Date Aug. 19, 1994 Sec. 102(e) Date Aug. 19, 1994 PCT Filed Sep. 4, 1993 PCT Pub. No. WO94/07720 PCT Pub. Date Apr. 14, 1994.A vehicle hydraulic brake system having an anti-lock protection device and an automatic braking system, particularly when driving around bends. During automatic braking, an auxiliary pressure source supplies a pressure instead of the main brake cylinder and this pressure can be individually set by pressure reduction in the wheel brakes by means of the anti-lock protection device. For this purpose, cylinders with separating pistons are located between the auxiliary pressure source and the anti-lock protection device. The auxiliary pressure source supplies substantially lower auxiliary pressures than known systems by supplying pressure to the inlets of feed-back pumps by arranging valves which permit temporary pressure increases to the extent necessary for automatic braking by means of these feed-back pumps. The system requires less energy and less noise is caused in automatic braking operations.