| 摘要 |
The invention relates to a motor-vehicle brake system with a tandem master brake cylinder 41 which is acted upon by a hydraulic brake booster 42. The brake booster 42 can be supplied with auxiliary hydraulic pressure from an auxiliary pressure source 49 via a brake valve 47 that can be actuated by means of a brake pedal 43. The motor-vehicle brake system furthermore has a brake-slip (anti-lock) control system which comprises first control valves 57, 58, 71, 74, arranged in brake circuits 54, 70, 73 leading to the wheel brake cylinders, and second control valves 63, 64, 63', 64', which connect the brake circuits 54, 70, 73 to a return line 65 and can be controlled by a conventional electronic brake-slip control circuit. Also provided is a drive-slip (traction) control system which supplies the brake circuits 54; 70, 73 of the driven wheels with hydraulic pressure via a first switching valve 39 when drive slip occurs and the brake pedal 43 is unactuated and which has a second switching valve 10, which prevents the auxiliary hydraulic pressure from being fed from the pressurised brake circuits 54; 70, 73 to the brake booster 42. The second switching valve 10 is a three-port a, b, c, two position valve which can be switched from its first position to its second position by the auxiliary hydraulic pressure applied via the first switching valve 39. As soon as the auxiliary hydraulic pressure ... by the first ... Original abstract incomplete. <IMAGE>
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