BRAKE-SYSTEM WITH ANTILOCK DEVICE FOR VEHICLES

The invention relates to a brake system with antilock device for a motor vehicle. According to the invention, a two-channel design is proposed having only one sensor (S1, S2) on each front wheel (VL, VR), the antilock system engaging directly on the front wheels (VL and VR) only. The rear wheels are made to follow with the aid of a step piston cylinder arrangement (10) with an averaged brake pressure. Although, basically, an hydraulic and electronic two-channel system structure is present, an hydraulic 3-channel system is obtained, one channel being dependent on the other two. Thus, with simple design, in particular a good braking action on mu split and increased safety are obtained since in the event of leakage on a front wheel the remaining three wheels can be braked; in the event of a failure of the rear wheel brakes, the braking capacity is maintained on both front wheels. In a further embodiment of the invention, two step piston cylinder arrangements (10) are used.