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Experimental study of an automotive Diesel engine efficiency when running under stoichiometric conditions

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  • Tauzia, Xavier
  • Maiboom, Alain

Abstract

If run under stoichiometric air–fuel ratio a Diesel engine could use a simple three way catalyst for NOx after-treatment instead of complex and expensive devices. This concept of Stoichiometric Diesel Combustion (SDC) has been experimentally tested on a modern automotive Diesel engine. Injection strategy (injection pressure, phasing, with or without pilot, multi-injection) and intake strategy (exhaust gas recirculation rate, swirl level) have been studied, for three operating points. It appears that, for the best strategies, brake thermal efficiency drops between 5% and 10% as compared with conventional lean Diesel. For each operating point, this drop is analysed with energy balance charts, and combustion rate of heat release. In particular the evolutions of combustion efficiency and gross indicated thermal efficiency are studied and it appears that there are some trades-offs between these two parameters. The evolution of particulate emissions and exhaust temperature are also described and commented. Finally, these results are used to propose some hardware modifications to improve SDC engine efficiency.

Suggested Citation

  • Tauzia, Xavier & Maiboom, Alain, 2013. "Experimental study of an automotive Diesel engine efficiency when running under stoichiometric conditions," Applied Energy, Elsevier, vol. 105(C), pages 116-124.
    • Handle: RePEc:eee:appene:v:105:y:2013:i:c:p:116-124
    DOI: 10.1016/j.apenergy.2012.12.034
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    References listed on IDEAS

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    Cited by:

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    2. Kuwahara, T. & Nishii, S. & Kuroki, T. & Okubo, M., 2013. "Complete regeneration characteristics of diesel particulate filter using ozone injection," Applied Energy, Elsevier, vol. 111(C), pages 652-656.
    3. Junhong Zhang & Zhexuan Xu & Jiewei Lin & Zefeng Lin & Jingchao Wang & Tianshu Xu, 2018. "Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification," Energies, MDPI, vol. 11(8), pages 1-20, August.
    4. Zhao, Xiaohuan & Zuo, Hongyan & Jia, Guohai, 2022. "Effect analysis on pressure sensitivity performance of diesel particulate filter for heavy-duty truck diesel engine by the nonlinear soot regeneration combustion pressure model," Energy, Elsevier, vol. 257(C).
    5. Serrano, J.R. & Climent, H. & Piqueras, P. & Angiolini, E., 2014. "Analysis of fluid-dynamic guidelines in diesel particulate filter sizing for fuel consumption reduction in post-turbo and pre-turbo placement," Applied Energy, Elsevier, vol. 132(C), pages 507-523.
    6. Leach, Felix & Ismail, Riyaz & Davy, Martin, 2018. "Engine-out emissions from a modern high speed diesel engine – The importance of Nozzle Tip Protrusion," Applied Energy, Elsevier, vol. 226(C), pages 340-352.

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