| 摘要 |
Brake system for motor vehicles having a pressure medium reservoir (4) which is under atmospheric pressure, a circuit pressure provision device (100) which comprises a brake master cylinder (2) which can be actuated by brake pedal with a first and a second pressure chamber (17, 18), wherein the first pressure chamber is connected to a first brake circuit pressure line section (12a) and the second pressure chamber is connected to a second brake circuit pressure line section (12b), a travel simulator (3) which imparts the customary brake pedal feeling to the vehicle driver in a "brake-by-wire" operating mode, and a first electrically controllable pressure provision device (5), and an electrohydraulic wheel pressure provision device (200), by means of which first wheel brakes (8, 9) are connected to the first brake circuit pressure line section and second wheel brakes (10, 11) are connected to the second brake circuit pressure line section, wherein the wheel pressure provision device (200) comprises a second electrically controllable pressure provision device (60a, 60b) and one inlet valve (6a-6d) and one outlet valve (7a-7d) per wheel brake (8, 9, 10, 11) for setting wheel-individual brake pressures, wherein a direct hydraulic connection (40a, 40b) is provided between the brake circuit pressure line section (12a, 12b) and the pressure medium reservoir (4) for one of the brake circuit pressure line sections (12a, 12b), in which hydraulic connection (40a, 40b) a first check valve (51a, 51b) which opens in the direction of the brake circuit pressure line section is arranged, and method for operating a brake system. |
