中文摘要：

提出了一种直接利用内燃机活塞的直线往复运动实现水压力能输出的新工作模式。实现了内燃机和柱塞式水泵结构的一体化，研制了内燃式水动力系统试验样机。介绍了其工作原理和结构特点。采用计算机仿真的方法，得到了满负荷条件下的主要工作性能。结果表明，在满负荷条件下，其有效功率、有效热效率及输出压力比内燃机一柱塞式水泵组合系统大约高13％～15％：燃油消耗率大约低15％左右。通过试验，给出了满负荷条件下燃油消耗率、输出压力、输出流量与曲轴工作转速之间的关系曲线，并与仿真结果进行了比较。给出了满负荷条件下，内燃式水动力系统转速的最佳工作区间。

英文摘要：

A new working mood of directly using the reciprocaring motion of piston for outputting water power is put forward. The unitary design of internal combustion engine and piston pump is accomplished. A sample machine of the internal combustion water power system is made and tested. The working principle and the structural characteristics are introduced. The main working performance in fully load condition is obtained by using the method of computer simulation. The results show that the effective power, the effective thermal efficiency and the output pressure in fully load condition are about 13%～15% higher than the combination system of the internal combustion engine and piston pump, and that the fuel consumption is about 15% lower than the combination system. Using the test method, the fully load characteristics are given. The experimental results are compared with the results of the simulation. The best work area of rotate speed in fully load condition is given.