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Environment-adaptive method to control intake preheating for diesel engines at cold-start conditions

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  • Li, Yikai
  • Wang, Dongfang
  • Shi, Zhongjie
  • Chen, Haiyan
  • Liu, Fushui

Abstract

Preheating the fresh charge is an effective way to improve the diesel cold-start performance. In the present study, the minimum intake preheating powers at different ambient temperatures and densities were investigated by using the optical experiments, engine bench tests and thermodynamic theory, to explore an environment-adaptive method of intake preheating power at cold-start conditions. The optical experiment results show that the critical ignition temperature of diesel spray decreases rapidly and then slowly with the decrease of in-cylinder density, and a relation between them is established. The results of engine bench tests show that the actual in-cylinder pressure is smaller than the theoretical compression pressure, and the relation between them is established in a wide speed range. Based on the experimental results and the thermodynamic theory, we establish a map chart of the intake preheating power with the ambient temperature and altitude. The results show that the minimum intake preheating power increases linearly as the ambient temperature decreases at the speed of first injection, and it first decreases and then increases as the speed increases during speed-up period. The requirement of the minimum intake preheating powers at the speed of first injection and speed-up period have different turning points with the change of altitude.

Suggested Citation

  • Li, Yikai & Wang, Dongfang & Shi, Zhongjie & Chen, Haiyan & Liu, Fushui, 2021. "Environment-adaptive method to control intake preheating for diesel engines at cold-start conditions," Energy, Elsevier, vol. 227(C).
    • Handle: RePEc:eee:energy:v:227:y:2021:i:c:s0360544221006721
    DOI: 10.1016/j.energy.2021.120423
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    References listed on IDEAS

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    1. Shi, Zhicheng & Lee, Chia-fon & Wu, Han & Wu, Yang & Zhang, Lu & Liu, Fushui, 2019. "Optical diagnostics of low-temperature ignition and combustion characteristics of diesel/kerosene blends under cold-start conditions," Applied Energy, Elsevier, vol. 251(C), pages 1-1.
    2. Broatch, A. & Ruiz, S. & Margot, X. & Gil, A., 2010. "Methodology to estimate the threshold in-cylinder temperature for self-ignition of fuel during cold start of Diesel engines," Energy, Elsevier, vol. 35(5), pages 2251-2260.
    3. Kan, Zechao & Hu, Zhiyuan & Lou, Diming & Tan, Piqiang & Cao, Zhiyi & Yang, Zhenhuan, 2018. "Effects of altitude on combustion and ignition characteristics of speed-up period during cold start in a diesel engine," Energy, Elsevier, vol. 150(C), pages 164-175.
    4. Shi, Zhicheng & Lee, Chia-fon & Wu, Han & Li, Haiying & Wu, Yang & Zhang, Lu & Bo, Yaqing & Liu, Fushui, 2020. "Effect of injection pressure on the impinging spray and ignition characteristics of the heavy-duty diesel engine under low-temperature conditions," Applied Energy, Elsevier, vol. 262(C).
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    1. Wang, Dongfang & Zhang, Jiahao & Li, Yikai & Shi, Zhongjie & Yang, Ziming, 2023. "Experimental investigation of a post-combustion pool fire phenomenon due to the spray-wall interaction under DI engine-like cold-start conditions," Energy, Elsevier, vol. 274(C).
    2. Xuewen Zhang & Xiang Huang & Peiyong Ni & Xiang Li, 2023. "Strategies to Reduce Emissions from Diesel Engines under Cold Start Conditions: A Review," Energies, MDPI, vol. 16(13), pages 1-21, July.
    3. Yang, Ziming & Fei, Chunguang & Li, Yikai & Wang, Dongfang & Sun, Chenhan, 2023. "Experimental study of the effect of physical and chemical properties of alcohols on the spray combustion characteristics of alcohol-diesel blended fuels," Energy, Elsevier, vol. 263(PE).
    4. Liu, Jinlong & Wang, Bosen & Meng, Zhongwei & Liu, Zhentao, 2023. "An examination of performance deterioration indicators of diesel engines on the plateau," Energy, Elsevier, vol. 262(PB).
    5. Sun, Hao & Zhang, Wugao & Wang, Yixuan, 2023. "Experimental study on improving cold start performance of diesel engines at extremely low ambient temperatures with diethyl ether," Energy, Elsevier, vol. 283(C).
    6. Lu, Kangbo & Qiu, Hongjian & Chen, Ziqiang & Shi, Lei & Deng, Kangyao, 2023. "Environmental adaptability method for improving the cold start performance of the diesel engine based on pilot injection strategy," Energy, Elsevier, vol. 281(C).

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