中文摘要：

降低液压系统的能耗、噪声，减小废油处理对环境的污染，最直接的方法是采用无节流损失的泵控技术，通过改变泵转速或泵排量，使泵输出流量和压力与负载要求完全匹配。在论述泵控液压缸技术特征、现状和存在问题的基础上，根据双作用叶片泵（马达）和轴向柱塞泵结构特点，提出两种新的配流原理，解决差动缸流量不对称影响控制的难题。采用新的配流原理，无需辅助元件，只用一台泵就可闭环控制差动缸的运动，具有能量效率高、结构紧凑和成本低的优势。进一步对这两种配流原理和采用这两种配流原理控制差动缸的系统集成方案作了论述和研究，研究成果对实现液压控制技术的绿色化具有理论和实际意义。

英文摘要：

In order to reduce the energy consumption, the noise and the pollution caused by waste oil disposal in hydraulic system, the most direct method is adopting the pump controlled technology without throttle loss. In pump controlled system, through changing the speed or the displacement of the pump, the pressure and volume flow will be completely matched with the need of loads. First the technical characteristics, state of the art and the existing problems about pump controlled cylinder are discussed, then according to the construction features of the double-acting vane pump （motor） and the axlial piston pump, two innovative flow distribution principles are put forward to balance the asymmetrical volume flow produced by unequal areas of the differential cylinder. By using new methods the movement differential cylinder can be closed-loop controlled with only one pump without using any auxiliary elements. So the new system solution has the advantages of high energy efficiency, compact structure and low cost. The two new flow distribution principles and the system integration schemes used to control the differential cylinder with these two new principles are analyzed. The research work will be of great theoretical and practical significance to realizing the green hydraulic control technology.