Numerous researchers have devised various strategies to improve the combustion efficiency of the internal combustion engine. Despite continuous improvement during past decades, there is still scope for further development in engine performance. This paper analyzes the energy and exergy distribution of a single-cylinder 199.5 cc electronic fuel injected three-spark ignited high-speed petrol engine. The engine is operated at 25%, 50%, 75%, and 100% throttle positions for different speeds of 4000–10,000 rpm with an increment of 2000 rpm. From the detailed heat balance analysis, the best results obtained are: maximum brake thermal efficiency of 34.9% corresponding to 6000 rpm at 50% throttle opening, minimum heat carried away by exhaust gas of 18.5% at 4000 rpm and 25% throttle position, minimum heat carried by cooling water as 13% for 10,000 rpm and 25% throttle, and the minimum unaccounted energy loss of 26.6% under the condition 8000 rpm and 75% throttle position. However, the best results of exergy analysis are: second law efficiency of 51.93% corresponding to 4000 rpm and 25% throttle, maximum exergy transfer for useful work as 33.7% concerning 6000 rpm and 50% throttle, minimum exergy transfer for exhaust gas as 15.7% for 6000 rpm and 25% throttle, minimum exergy transfer associated with coolant of 4.6% at 4000 rpm and 25% throttle, and minimum exergy destruction of 39.4% corresponding to 8000 rpm and 50% throttle, respectively.

许多研究人员已经设计出各种策略来提高内燃机的燃烧效率。尽管在过去的几十年中不断改进，但发动机性能仍有进一步发展的空间。本文分析了单缸199.5 cc电子燃油喷射三火花点火高速汽油发动机的能量和火用分布。在4000–10,000 rpm的不同转速下，发动机以25％，50％，75％和100％的节气门位置操作，并以2000 rpm的增量增加。通过详细的热平衡分析，可获得的最佳结果是：最大制动热效率为34.9％，对应于在50％节气门打开时为6000 rpm，在4000 rpm和25％节气门位置时，废气带走的最小热量为18.5％。冷却水带走的热量为10％的13％，000 rpm和25％的节气门，在8000 rpm和75％的节气门位置的情况下，最小的未说明的能量损失为26.6％。但是，火用分析的最佳结果是：第二定律效率为51.93％，对应于4000 rpm和25％的节气门，有用工作的最大火用传递为33.7％（6000 rpm和50％的节气门），排气的最小火用传递为15.7对于6000 rpm和25％的节气门，％表示，与4000 rpm和25％的节气门的冷却液相关的最小46.6％的火用传递，以及分别对应于8000 rpm和50％的节气门的39.4％的最小火用破坏。