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Methodology to estimate the threshold in-cylinder temperature for self-ignition of fuel during cold start of Diesel engines

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  • Broatch, A.
  • Ruiz, S.
  • Margot, X.
  • Gil, A.

Abstract

Cold startability of automotive direct injection (DI) Diesel engines is frequently one of the negative features when these are compared to their closest competitor, the gasoline engine. This situation worsens with the current design trends (engine downsizing) and the emerging new Diesel combustion concepts, such as HCCI, PCCI, etc., which require low compression ratio engines. To mitigate this difficulty, pre-heating systems (glow plugs, air heating, etc.) are frequently used and their technologies have been continuously developed. For the optimum design of these systems, the determination of the threshold temperature that the gas should have in the cylinder in order to provoke the self-ignition of the fuel injected during cold starting is crucial. In this paper, a novel methodology for estimating the threshold temperature is presented. In this methodology, experimental and computational procedures are adequately combined to get a good compromise between accuracy and effort. The measurements have been used as input data and boundary conditions in 3D and 0D calculations in order to obtain the thermodynamic conditions of the gas in the cylinder during cold starting. The results obtained from the study of two engine configurations -low and high compression ratio- indicate that the threshold in-cylinder temperature is a single temperature of about 415 °C.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:5:p:2251-2260
    DOI: 10.1016/j.energy.2010.02.012
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    References listed on IDEAS

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    1. Peng, Haiyong & Cui, Yi & Shi, Lei & Deng, Kangyao, 2008. "Effects of exhaust gas recirculation (EGR) on combustion and emissions during cold start of direct injection (DI) diesel engine," Energy, Elsevier, vol. 33(3), pages 471-479.
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    2. Pastor, J.V. & Bermúdez, V. & García-Oliver, J.M. & Ramírez-Hernández, J.G., 2011. "Influence of spray-glow plug configuration on cold start combustion for high-speed direct injection diesel engines," Energy, Elsevier, vol. 36(9), pages 5486-5496.
    3. Broatch, A. & Tormos, B. & Olmeda, P. & Novella, R., 2014. "Impact of biodiesel fuel on cold starting of automotive direct injection diesel engines," Energy, Elsevier, vol. 73(C), pages 653-660.
    4. Najjar, Yousef S.H., 2011. "Comparison of performance of a Greener direct-injection stratified-charge (DISC) engine with a spark-ignition engine using a simplified model," Energy, Elsevier, vol. 36(7), pages 4136-4143.
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    7. 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.
    8. Jacek CABAN & Paweł DROŹDZIEL & Piotr IGNACIUK & Paweł KORDOS, 2019. "The Impact Of Changing The Fuel Dose On Chosen Parameters Of The Diesel Engine Start-Up Process," Transport Problems, Silesian University of Technology, Faculty of Transport, vol. 14(4), pages 51-62, December.
    9. 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).
    10. Mitchell, Brett J. & Zare, Ali & Bodisco, Timothy A. & Nabi, Md Nurun & Hossain, Farhad M. & Ristovski, Zoran D. & Brown, Richard J., 2017. "Engine blow-by with oxygenated fuels: A comparative study into cold and hot start operation," Energy, Elsevier, vol. 140(P1), pages 612-624.

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