Patent ID: 8857922

Claim:
A hydraulic vehicle brake system comprising: a brake line for conducting a hydraulic pressure medium, which connects a master cylinder attached to a non-pressurized storage vessel to a wheel brake, a first pressure modulation valve on an inlet side of the wheel brake inserted in the brake line between the master cylinder and the wheel brake, a second pressure modulation valve on an outlet side of the wheel brake inserted in a return line connecting the wheel brake to a low-pressure accumulator, a pump disposed on the return line downstream of the low-pressure accumulator, the pump removing the hydraulic pressure medium from the low-pressure accumulator to regulate the brake pressure and conveying it via the first pressure modulation valve on the inlet side to the wheel brake and also via an isolation valve disposed in the brake line upstream of the first pressure modulation valve on the inlet side in the direction of the master cylinder, a pump suction line discharging into a portion of the return line that extends between the pump and the low-pressure accumulator, an electromagnetically opening changeover valve inserted in the pump suction line, wherein when the master cylinder is actuated, the pressure provided by the master cylinder can be fed to the low-pressure accumulator, bypassing the wheel brake.