负荷传感技压系统不仅效率高，而且有很好的操作性，在国外很多型号的挖掘机中得到了广泛的应用。在负荷传感液压系统中，有泵控和问控两种形式，前者采用变量泵，后者采用定量泵，与间校形式相比，泵校式有更高的传动效率。有的负荷传感系统只适用于单个执行元件的控制，有的 Load sensing technology system is not only high efficiency, but also has good operability in many foreign models of excavators has been widely used. In the load sensing hydraulic system, there are two forms of pump control and question control. The former adopts a variable displacement pump, the latter adopts a fixed displacement pump. Compared with the inter-school form, the pump-school has higher transmission efficiency. Some load sensing system only applies to the control of a single actuator, and some