功率敏感泵的输出压力和流量可随负载变化，从而可使液压系统的效率大幅度提高。功率敏感泵的工作原理如图1所示。 负载敏感阀Ls与系统中可调节流阀组成调节器，限压阀Pc控制泵出口的绝对压力。 1． 压力适应过程。当负载压力PL发生变化时，节流阀的可变节流口面积A不变，节流 The output pressure and flow rate of the power-sensitive pump can vary with load, resulting in a substantial increase in efficiency of the hydraulic system. Power-sensitive pump works as shown in Figure 1. The load-sensitive valve Ls and regulators in the system make up a regulator. The pressure-limiting valve Pc controls the absolute pressure at the pump outlet. 1. Pressure adaptation process. When the load pressure PL changes, the throttle variable throttle area A constant, throttling