| 摘要 |
<p>The valve unit comprises two interception valves (V1, V2) between an inlet connector (1) intended to be connected to a compressor, and two outlet connectors (21, 22) intended to be connected to the two braking circuits of the braking system. The outlets of these interception valves can be coupled to the inlets of another two interception valves (V3, V4) via two supplementary valves (I1, I2) having a fixed opening pressure which is lower than the opening pressure of the said interception valves (V1-V4). The said second interception valves (V3, V4) are intended to be connected at their outlets, respectively, to a parking brake device and to auxiliary pneumatic devices of the braking system. <IMAGE></p> |
