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유지 작용

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동력 차량에 따라 브레이크 파이프 압력을 제어하는 ​​두 가지 방법이 있습니다. 셀프 래핑과 이전의 비자립 래핑입니다.

셀프 랩핑 시스템에서 브레이크 파이프 압력은 자동으로 처리됩니다. 운전자는 열차 제동 레버를 범위 내 아무 위치로나 설정할 수 있습니다. "적용" 방향으로 멀리 설정할수록 제동력이 강해지며 반대의 경우도 마찬가지입니다. 밸브는 레버의 위치에 따라 브레이크 파이프의 덤핑 또는 가압을 자동으로 처리합니다.

On non-self-lapping systems, the process is more hands-on. The lever has a few fixed positions. Two of the positions, called “release” and “service” can be thought of as adding and releasing the brake pipe pressure, respectively. The position in between them, called “lap”, is used to maintain whatever pressure is in the brake pipe. The furthest position, called “emergency”, will release pressure at the fastest possible rate.

Auxiliary reservoirs are being drained when braking. When the brakes are released, it takes some time for auxiliary reservoirs to fill up again. The lap position, however, functions only if the auxiliary reservoirs are full. To stay in full control over braking it is recommended to not release non-self-lapping brakes when knowing that moments later braking may be needed again. Calculated, slow moves are preferable when releasing the non-self-lapping brakes.

With both brake types, the driver can see exactly how much braking force they are applying by looking at the brake pipe and brake cylinder gauge needles.

셀프 랩핑이 초보자에게 더 직관적일 수 있지만 두 시스템 모두 사용이 매우 간단합니다. 간단히 말해서 셀프 랩핑의 경우 제어 장치가 원하는 제동력을 설정하고 자동 밸브가 작업을 수행하도록 하는 반면, 논셀프 랩핑의 경우 제어 장치가 직접 제동력을 설정합니다.

In case a train contains motorized vehicles with both self-lapping and non-self-lapping brake valve types, only the self-lapping ones will be functional when operating the brake. For that purpose, vehicles are also equipped with brake cutout valves, which can be used to isolate certain vehicles from the brake system and resolve this conflict.

See also: Air Brake System Overview, Brake Cutout, Monitoring, Train Brake, Independent Brake, Brake Shoes