Experimental study on knock suppression of spark-ignition engine fuelled with kerosene via water injection

Chenyao Wang, Fujun Zhang, Enhua Wang*, Chuncun Yu, Hongli Gao, Bolan Liu, Zhenfeng Zhao, Changlu Zhao

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

60 引用 (Scopus)

摘要

The four-stroke spark-ignition (SI) internal combustion engine has good fuel economy and high power/weight ratio, making it very suitable for small aircraft. Normally, four-stroke aviation SI engines are fuelled with gasoline. Using kerosene can improve the system safety; However, a four-stroke SI engine fuelled with kerosene suffers from a small indicated mean effective pressure (IMEP) because of the knock limit of kerosene. In this study, water injection is investigated as a method of extending the knock limitation and improving IMEP of a four-stroke SI engine fuelled with kerosene. First, a Rotax 914 engine is retrofitted. Two port-fuel-injection systems supplied with kerosene and water are developed. Then, the combustion characteristics with water injection are studied. The effects of water injection on the in-cylinder pressure and heat-release rate are analysed. Additionally, the extent of knock suppression due to water injection under various engine speeds is evaluated. The results indicate that the knock limit of the four-stroke SI engine with kerosene is extended significantly via water injection. The measured IMEP is improved by 25–28% under different engine speeds. Thus, the requirement for ordinary cruise operation is satisfied. Furthermore, the security is enhanced with water injection.

源语言英语
页(从-至)248-259
页数12
期刊Applied Energy
242
DOI
出版状态已出版 - 15 5月 2019

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Wang, C., Zhang, F., Wang, E., Yu, C., Gao, H., Liu, B., Zhao, Z., & Zhao, C. (2019). Experimental study on knock suppression of spark-ignition engine fuelled with kerosene via water injection. Applied Energy, 242, 248-259. https://doi.org/10.1016/j.apenergy.2019.03.123