Patent ID: 8414089

Claim:
An externally actuable electrohydraulic vehicle brake system comprising: an electrohydraulic vehicle system with slip control, means for expressing a brake activation request in the form of a man/machine interface, friction brakes for converting kinetic energy, wherein the friction brakes are organized into at least two independent brake circuits, and an electronically controlled hydraulic unit for operating the friction brakes, said hydraulic unit having at least one hydraulic pump as a pressure source in order to permit distribution and/or control of friction braking portions as a function of either a brake activation request or an externally actuated braking intervention, wherein the man/machine interface is configured to be decoupled mechanically from the friction brakes, wherein the hydraulic pump is assigned means which permit the hydraulic pump to drive a hydraulic charging device which is connected to an inlet of the hydraulic pump for the purpose of pre-charging, and wherein the hydraulic charging device comprises i) a control chamber having an inlet that is in constant fluid communication with the hydraulic pump and ii) a supply chamber having an outlet that is in constant fluid communication with the hydraulic pump.