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Active Exhaust

Application References: Metro and urban rail transit vehicles

Active exhaust devices are adopted for urban rail transit vehicles with a maximum speed of 120 km/h and below.

When the vehicle passes tunnel portals and intermediate air shafts inside tunnels, the device receives pressure‑protection commands issued by the on‑board network system to close the fresh‑air damper and exhaust‑air damper in advance, so as to suppress external pressure fluctuations from propagating into the passenger compartment.

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