Abstract
Comparative analysis of in-cylinder air flow, mixture concentration and combustion performance was conducted based on three schemes of the Otto cycle, Miller cycle and Miller cycle with inlet cover (Masking). The results showed that the Miller cycle deteriorated in-cylinder air flow and the combustion performance to some extent due to the profile. However, Masking could greatly enhance the tumble ratio, improve the mixture concentration, increase the turbulent kinetic energy, and hence improve the combustion performance. Then the Otto cycle and Masking solution were further studied by the experiment. With the Masking, the torque of wide open throttle decreased by 12%, the rated power decreased by 3%, and BSFC decreased by 14.6% and 7.1% at average under wide open throttle and partial load conditions respectively. The Masking solution can further make the maximum thermal efficiency reach up to 38.6% after introducing the cooling EGR.
Key words
Miller cycle
/
Masking /
flow distribution /
combustion performance /
hybrid
Cite this article
Download Citations
MAN Xingjia，ZHOU Zhengqun，LIANG Yuanfei，YE Nianye.
Development of Hybrid-Dedicated Engine based on Miller Cycle[J]. Vehicle Engine. 2022, 0(2): 73 https://doi.org/10.3969/j.issn.1001-2222.2022.02.012
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
