Hydraulic brake system with slip control

A hydraulic brake system with slip control, of the type including a braking pressure generator which is hydraulically connected to at least one wheel brake by way of a main pressure line, a return line connected to the wheel brake and to a pressure-fluid collecting means, an auxiliary-pressure pump having an auxiliary-pressure line and being hydraulically connected to the braking pressure generator, and inlet and outlet valves inserted into the main pressure line and the return line and either closing or keeping open the pressure fluid passage in the main pressure line and in the return line, a controllable restrictor arranged in the main pressure line between the inlet valve and the wheel brake, permitting an unhindered hydraulic fluid flow in the main pressure line to the wheel brake in a first operating position and limiting the pressure fluid flow to the wheel brake in a second operating position, comprising:

• a first invariable orifice arranged in the main pressure line upstream of the inlet valve and a second invariable orifice arranged downstream of the controllable restrictor.