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Experimental Investigation on the Effects of Direct Injection Timing on the Combustion, Performance and Emission Characteristics of Methanol/Gasoline Dual-Fuel Spark Turbocharged Ignition (DFSI) Engine with Different Injection Pressures under High Load

Author

Listed:
  • Jun Wang

    (Sinopec Research Institute of Petroleum Processing, Beijing 100083, China)

  • Huayu Tian

    (Sinopec Research Institute of Petroleum Processing, Beijing 100083, China)

  • Ran Zhang

    (Sinopec Research Institute of Petroleum Processing, Beijing 100083, China)

  • Bo Shen

    (College of Automotive Engineering, Jilin University, Changchun 130022, China)

  • Yan Su

    (College of Automotive Engineering, Jilin University, Changchun 130022, China)

  • Hao Yu

    (College of Automotive Engineering, Jilin University, Changchun 130022, China)

  • Yulin Zhang

    (College of Automotive Engineering, Jilin University, Changchun 130022, China)

Abstract

The exceptional properties of methanol, such as its high octane number and latent heat of evaporation, make it an advantageous fuel for efficient utilization in dual-fuel combustion techniques. The aim of this study is to investigate the effect of direct methanol injection timing on the combustion, performance and emission characteristics of a dual-fuel spark ignition engine at different injection pressures. We conducted four different direct injection pressure tests ranging from 360° ahead to 30° CA ahead at 30° CA intervals. The experimental results indicate that regardless of the injection pressure, altering the methanol injection timing from −360° to −30° CA ATDC leads to distinct combustion behavior and changes in the combustion phase. Initially, as the injection timing is delayed, the combustion process accelerates, which is followed by a slower combustion phase. Additionally, the combustion phase itself experiences a delay and then advances. Regarding performance characteristics, both the brake thermal efficiency (BTE) and exhaust gas temperature (EGT) exhibit a consistent pattern of first increasing and then decreasing as the injection timing is delayed. This suggests that there is an optimal injection timing window that can enhance both the engine’s efficiency and its ability to manage exhaust temperature. In terms of emissions, there are different trends in this process due to the different conditions under which the individual emissions are produced, with CO and HC showing a decreasing and then increasing trend, and NOx showing the opposite trend. In conclusion, regardless of the injection pressure employed, adopting a thoughtful and well-designed injection strategy can significantly improve the combustion performance and emission characteristics of the engine. The findings of this study shed light on the potential of methanol dual-fuel combustion and provide valuable insights for optimizing engine operation in terms of efficiency and emissions control.

Suggested Citation

  • Jun Wang & Huayu Tian & Ran Zhang & Bo Shen & Yan Su & Hao Yu & Yulin Zhang, 2023. "Experimental Investigation on the Effects of Direct Injection Timing on the Combustion, Performance and Emission Characteristics of Methanol/Gasoline Dual-Fuel Spark Turbocharged Ignition (DFSI) Engin," Energies, MDPI, vol. 16(24), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:24:p:7921-:d:1294339
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    References listed on IDEAS

    as
    1. Shen, Bo & Su, Yan & Yu, Hao & Zhang, Yulin & Lang, Maochun & Yang, He, 2023. "Experimental study on the effect of injection strategies on the combustion and emissions characteristic of gasoline/methanol dual-fuel turbocharged engine under high load," Energy, Elsevier, vol. 282(C).
    2. Miganakallu, Niranjan & Yang, Zhuyong & Rogóż, Rafał & Kapusta, Łukasz Jan & Christensen, Cord & Barros, Sam & Naber, Jeffrey, 2020. "Effect of water - methanol blends on engine performance at borderline knock conditions in gasoline direct injection engines," Applied Energy, Elsevier, vol. 264(C).
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