采用变压差控制可减少阀门的节流损失，具有更好的节能效果。

Applying variable pressure difference control can reduce throttle loss and achieve better energy-saving effect.

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又由于是压缩着火而且没有节气门的节流损失，可导致高的热效率。

Additionally due to its compression ignition without throttle loss of valve throttle, it can make a higher heat efficiency.

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而容积调速回路既无溢流损失，也无节流损失，效率高，但低速稳定性差。

The volume loss of speed control loop neither overflow nor throttling losses, high efficiency, but poor low-speed stability.

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