Hydraulic brake system with device for active braking

Abstract

Hydraulic Brake System with a Device for Active Braking In order to enable a hydraulic brake system which has a self-priming return pump (14) to quickly fill the wheel brakes (5) in an active braking operation, the present invention discloses the provision of a pressure-volume converter (20) on the pressure side of the return pump (14). The converter (20) causes a large pressure fluid volume to be conducted into the brake line (4) to the wheel brake (5) concerned at a small delivery volume of the return pump (14). This is possible because a return pump can generate high pressure and, thus, produce a sufficient amount of force to displace a stepped piston which can then displace a large quantity of pressure fluid. To permit the development of a sufficient back pressure on the pressure side of the return pump (14), a pilot pressure non-return valve (19) is arranged in the pressure line (18) which extends in parallel to the pressure-volume converter (20). Valve (19) permits the passage of the delivered pressure fluid volume to the brake line (4) only when a pilot pressure prevails.

Dependencies are inferred from the claim text.