Analysed the power matching principle of a hydraulic excavator, advanced saving energy control planning which could obtain stable rotating speed of the engine by controlling the flow of every running of pump, the aim was for attaining saving energy.

• 摘要分析了液压挖掘机功率匹配原则，提出了通过控制泵的排量稳定发动机转速，以实现以节能为目的的模糊控制策略。