中文摘要：

阐述了单缸轴向液压约束活塞发动机的工作原理，通过运动学、动力学分析和数值模拟，得到了试验样机的输出特性。输出压力在同流量情况下随油门开度增大明显升高，同油门情况下存在最大压力工况。油门开度为80％、输出压力为1.1239MPa、输出流量为3．7571m^3／h时，燃油消耗率为291．2521g／（kW·h），处于全工况最小值。

英文摘要：

The working principle of the single-cylinder axial hydraulic confined piston engine is expounded. Based on the analysis of the kinematics and dynamics, and based on the numerical simulation, the output character of the sample engine is found. With the same flow rate condition, the output pressure of the system is apparently increased with the increase of throttle angle, and with the same throttle angle, there is a maximum point of output pressure. When the sample runs with 80% throttle angle, and 1. 123 9 MPa output pressure, and 3. 757 1 m^3/h flux, the fuel consumption ratio of the sample engine is 291. 252 1 g/（kW · h）, which is the minimum of the all-working conditions.