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本文提出的农业通用小型二冲程发动机是作者之一佐藤运男的设计方案。该方案能使活塞上下的速度随意改变,相对普通式发动机而言,具有这种可变机构的二冲程发动机叫做偏心式,曾试制出一台具有与普通式的气缸容积(160毫升)相同的发动机、研究重点在于增大输出功率,同时对燃油消耗率和排气公害(氮氧化合物、碳氢化合物、一氧化碳)的降低方法也加以研究。研究的结果表明,能够改善性能,并且可以降低燃油消耗率以及废气中的碳氢化合物和一氧化碳。但废气中氮氧化合物在某种程度上有所增加。第一篇叙述偏心式发动机的工作机构、偏心式和普通式的扫、排气口的时间面积的比较、实际测定性能的比较。第二篇论述PV线图,即平均指示压力的计算方法。第三篇论述因曲轴箱压缩而引起的泵气损失和机械损失等。第四篇叙述实验装置及实验方法以及实验结果和理论结果的综合对比。
This article proposes a general agricultural small two-stroke engine is one of the authors Sato Yun-man design. The program can make the piston up and down the speed of random change, compared to ordinary engines, with this variable mechanism of the two-stroke engine called eccentric, have tried to produce a cylinder with the same volume (160 ml) the same Engine, the research focuses on increasing the output power, and at the same time, the methods of reducing fuel consumption and exhaust pollution (nitrogen oxides, hydrocarbons, carbon monoxide) are also studied. The results of the study show that the performance can be improved and the fuel consumption and the hydrocarbons and carbon monoxide in the exhaust gas can be reduced. However, NOx in the exhaust gas to some extent increased. The first describes the eccentric engine working mechanism, the eccentric and ordinary type of sweep, exhaust time area comparison, the actual measured performance comparison. The second discusses the PV line graph, which means that the average indicated pressure is calculated. The third chapter deals with pumping losses and mechanical losses due to crankcase compression. The fourth chapter describes the experimental device and experimental methods and experimental results and theoretical results of a comprehensive comparison.