| 摘要 |
A hydraulic dual-circuit brake system with an anti-skid system (ABS) and traction control (ASR) for motor vehicles having a four-channel hydraulic unit with four control valves; a return pump with two separate pump elements for each brake circuit; and two-low-pressure reservoirs connected to the inlets of the pump elements. To supply brake pressure in the traction control mode, an additional hydraulic unit is used, which has a precharging pump for feeding brake fluid from a brake fluid tank into each brake circuit containing a driven wheel, and having a valve unit, which in traction control operation disconnects the pump element associated to a brake circuit having at least one driven wheel from the master brake cylinder on the outlet side. For the sake of improved dynamics during brake pressure buildup, a shutoff element, which in traction control operation disconnects the low-pressure reservoir from the precharging pump, is provided between the low-pressure reservoir and the associated pump element.
|
