Study on Engine Performance and Combustion System Optimization of a Poppet-Valve Two-Stroke Diesel Engine

Yaozong Li, Han Wu, Yanli Liu, Lu Zhang, Yongping Qiang, Wei Liu, Jinlong Liu, Honglin Bai, Caifeng Hao and Yang Li
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Yaozong Li: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Han Wu: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yanli Liu: China North Engine Research Institute, Tianjin 300400, China
Lu Zhang: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yongping Qiang: China North Engine Research Institute, Tianjin 300400, China
Wei Liu: China North Engine Research Institute, Tianjin 300400, China
Jinlong Liu: China North Engine Research Institute, Tianjin 300400, China
Honglin Bai: China North Engine Research Institute, Tianjin 300400, China
Caifeng Hao: China North Engine Research Institute, Tianjin 300400, China
Yang Li: China North Engine Research Institute, Tianjin 300400, China

Energies, 2022, vol. 15, issue 10, 1-21

Abstract: Two-stroke engines have higher power density than traditional four-stroke engines, and therefore are suitable for engine downsizing. In this work, a four-stroke single-cylinder diesel engine is modified for two-stroke operation, and the combustion system is designed and optimized using a 3D simulation. Three different combustion chamber profiles and injection spray angles are compared to determine an optimized combustion system. The engine test results show that the two-stroke engine equipped with the newly designed combustion system is able to achieve the same effective power output at a much lower speed than the original four-stroke engine, as well as obtain a better indicated thermal efficiency. This indicates that the poppet-valve two-stroke engine could be an effective technical approach for engine downsizing.

Keywords: poppet-valve two-stroke diesel engine; combustion system; combustion chamber profile; spray angle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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