若时间超过，则应调整泵排量。
If the time is over, oil pump's capacity should be adjusted.
变量泵仅运行在第一和第二泵排量位置中的一个位置上。
The variable displacement pump operates in only one of the first and second pump displacement settings.
设计了一个盾构掘进机的刀盘驱动液压系统，该系统是开式液压系统，应用电液比例控制技术实现了泵排量实时调节。
A hydraulic drive system of cutter head in shield tunneling machine was designed, which is open type hydraulic system and controlled in open-ring.
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