In this paper, the principle of variable speed pump control hydraulicdifferentialcylinder is designed, and the simulation model of system is built, and the simulation research is carried out.
给出了采用变转速泵控闭式回路控制差动缸的原理，建立了该系统的数学模型，进行了计算机数字仿真研究。
2
The differentialhydrauliccylinder raises the efficiency and decreases the loss of the energy.
液压缸的差动连接，提高了系统的效率，节省了能源，并且工作稳定、可靠。
3
The working principle and structure of 3-cylinderhydraulic confined piston engine (HCPE) is put forward, and the working process differential equations is constructed.