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Experimental study on the two-phase fuel transient injection characteristics of the high-pressure natural gas and diesel co-direct injection engine

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  • Yang, Xiyu
  • Wang, Xiaoyan
  • Dong, Quan
  • Ni, Zuo
  • Song, Jingdong
  • Zhou, Tanqing

Abstract

In this paper, an innovative fuel injection rate measurement methodology for the natural gas and diesel co-direct injection injector was designed to study the dual-fuel injection characteristics for a high-pressure natural gas direct injection engine. The results indicate that the injection mass shows two different upward trends as the energizing time (ET) increases, and it appears more sensitive to the length of ET when it is short. The gas injection duration is affected by both the injection pressure and ambient pressure under the same ET, thus any increase in either will significantly increase the injection duration, resulting in a pronounced increase in gas injection mass. The process of diesel pilot injection has a remarkable effect on the gas injection rate. According to the actual engine working condition, provided that the pilot diesel ET is 0.8 ms, the gas injection mass reaches the minimum value when the split time is about 0.8 ms, meanwhile, it reaches the maximum value when the split time is about 0.2 ms or 2 ms. The results of this study can provide an accurate database for the performance of the injector and accurate fuel injection boundary conditions for the combustion process in the engine cylinder.

Suggested Citation

  • Yang, Xiyu & Wang, Xiaoyan & Dong, Quan & Ni, Zuo & Song, Jingdong & Zhou, Tanqing, 2022. "Experimental study on the two-phase fuel transient injection characteristics of the high-pressure natural gas and diesel co-direct injection engine," Energy, Elsevier, vol. 243(C).
    • Handle: RePEc:eee:energy:v:243:y:2022:i:c:s0360544222000172
    DOI: 10.1016/j.energy.2022.123114
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    References listed on IDEAS

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    1. Li, Menghan & Liu, Gengfei & Liu, Xiaori & Li, Zhijie & Zhang, Qiang & Shen, Boxiong, 2019. "Performance of a direct-injection natural gas engine with multiple injection strategies," Energy, Elsevier, vol. 189(C).
    2. Ran, Zhongnan & Hariharan, Deivanayagam & Lawler, Benjamin & Mamalis, Sotirios, 2020. "Exploring the potential of ethanol, CNG, and syngas as fuels for lean spark-ignition combustion - An experimental study," Energy, Elsevier, vol. 191(C).
    3. Jingrui Li & Jietuo Wang & Teng Liu & Jingjin Dong & Bo Liu & Chaohui Wu & Ying Ye & Hu Wang & Haifeng Liu, 2019. "An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines," Energies, MDPI, vol. 12(13), pages 1-18, July.
    4. Lee, Sangho & Yi, Ui Hyung & Jang, Hyungjoon & Park, Cheolwoong & Kim, Changgi, 2021. "Evaluation of emission characteristics of a stoichiometric natural gas engine fueled with compressed natural gas and biomethane," Energy, Elsevier, vol. 220(C).
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    1. Yang, Xiyu & Dong, Quan & Wang, Xiaoyan & Zhou, Tanqing & Wei, Daijun, 2023. "An experimental study on the needle valve motion characteristics of high pressure natural gas and diesel co-direct injector," Energy, Elsevier, vol. 265(C).

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