当活塞再一次到达下止点时，排气门打开。

As the piston reaches BDC again the exhaust valve opens.

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当活塞再一次到达下止点时，排气门打开。

As the piston reaches BDC again, the exhaust valve opens.

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但是像进气门一样，排气门需要时间到达充分打开和关闭的位置。

But like the inlet valve, the exhaust valve needs time to reach the full-open position, it also needs time to reach the full-closed position.

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排气气门(5)为了发动机制动借助于开到节流位置的节流元件可转换到一暂时打开的位置上。

The exhaust valve (5) for engine brake switches the throttle element into an opened position from a throttle position.

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液压气门辅助控制单元（12）将排气气门（5）保持在暂时打开的位置上。

The hydraulic valve auxiliary control unit (12) keeps the exhaust valve (5) in a temporary opening position.

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液压气门辅助控制单元（12）将排气气门（5）保持在暂时打开的位置上。

The hydraulic valve auxiliary control unit (12) keeps the exhaust valve (5) in a temporary opening position.

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