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五十年代中期,英国国家农业工程研究所进行了拖拉机采用静液压驱动的研究。六十年代,美国、西德等相继开展了这方面的研究工作。我国研究行走机械液压驱动已有20年的历史,早在1958年就开始了样机研究工作。1964年后,全国有几十个单位对静液压驱动车辆进行研究。1970年和1972年,召开过两次静液压驱动交流会。研究静液压驱动的单位遇到了同样的问题,即传动效率低、工作不可靠、变速范围小等。另外,在变量泵和液压马达的研制方面,缺乏试验设备。在国外,美国Sundstrand公司最早在
In the mid-1950s, the British National Institute of Agricultural Engineering conducted a study of the tractor using hydrostatic drive. In the 1960s, the United States and West Germany conducted research in this area. Research on walking hydraulic drive in China has been 20 years of history, as early as 1958 began the prototype research. After 1964, dozens of units nationwide studied hydrostatic vehicles. In 1970 and 1972, there were two hydrostatic drive exchange sessions. Research Hydrostatic drive units have encountered the same problem, that is, low transmission efficiency, unreliable work, small range of variable speed and so on. In addition, variable pump and hydraulic motor development, the lack of test equipment. Abroad, the United States Sundstrand company first in the