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Gasoline-diesel dual fuel intelligent charge compression ignition (ICCI) combustion: Conceptual model and comparison with other advanced combustion modes

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Abstract

The internal combustion engines can remain the advantage over competitor technologies for automotive driven, especially the engine efficiency, exceeded 50% while maintaining ultra-low emissions. In this paper, a novel combustion mode characterized by dual high-pressure common-rail direct injection systems, denoted as intelligent charge compression ignition (ICCI) combustion, is proposed to realize high efficiency and clean combustion in wide engine operating ranges. Specifically, commercial gasoline and diesel, which are considered to be complementary in physical and chemical properties, are directly injected into the cylinder by the two independent injection systems, respectively. Through this unique design, the in-cylinder air-fuel mixtures can be flexibly adjusted by regulating injection timing and duration of different fuels, consequently obtaining suitable combustion phase and heat release rate. The ICCI mode can widely run from indicated mean effective pressure 2 bar to 16 bar with an utterly controllable cylinder pressure rising rate, around 50% indicated thermal efficiency and low NOx emissions. A series of experiments were carried out to compare the combustion and emissions of ICCI with other combustion modes (including conventional diesel combustion, reactivity-controlled compression ignition, partially premixed combustion, and gasoline compression ignition). The results show that at the medium engine loads, ICCI mode can reach much high indicated thermal efficiency, especially up to 52% along with extremely low NOx emissions. Prospectively, ICCI mode can realize real-time adjustments of in-cylinder mixture stratification and instantaneous combustion mode switch in one cycle at any operating conditions, and has an excellent commercial application prospect for energy conservation and environmental improvement.

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Authors and Affiliations

  1. Key Laboratory for Power Machinery and Engineering of M.O.E., Shanghai Jiao Tong University, Shanghai, 200240, China

    ZiLong Li, Yong Qian, Guan Huang, WenBin Zhao, YaoYuan Zhang & XingCai Lu

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  1. ZiLong Li
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  2. Yong Qian
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  3. Guan Huang
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  4. WenBin Zhao
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  5. YaoYuan Zhang
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  6. XingCai Lu
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Corresponding author

Correspondence to XingCai Lu.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51961135105, 51425602.

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Li, Z., Qian, Y., Huang, G. et al. Gasoline-diesel dual fuel intelligent charge compression ignition (ICCI) combustion: Conceptual model and comparison with other advanced combustion modes. Sci. China Technol. Sci. 64, 719–728 (2021). https://doi.org/10.1007/s11431-020-1598-1

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  • DOI: https://doi.org/10.1007/s11431-020-1598-1

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