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CAT320型挖掘机是美国CatCrPillar公司生产的一种技术较为先进的挖掘机。与传统的挖掘机相比，它采用先进的电液控制系统，能够根据挖掘机工作时外界载荷的变化，自动控制发动机的转速和变量泵的排量。发动机能根据外负荷变化以最佳功率输出，从而保持较高的工作效率，提高了挖
The CAT320 excavator is an excavator that is more advanced than CatCrPillar. Compared with traditional excavators, it uses an advanced electro-hydraulic control system that can automatically control the engine speed and the displacement of the variable pump according to the changes in the external load during excavator work. The engine can output at optimal power according to the change of external load, so as to maintain high working efficiency and improve digging