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Investigation of transient deterioration mechanism and improved method for turbocharged diesel engine

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  • Han, Yongqiang
  • Zhang, Longping
  • Liu, Zhongchang
  • Tian, Jing

Abstract

The object of this paper is to reveal the mechanism of combustion process and pollutant emission deterioration during transient operation and propose an improve method to reduce transient smoke opacity as much as possible while keep NOx formation below steady state condition. The paper reveals the transient operation deterioration mechanism from the following three levels: First, the combustion parameters response level (also known as boundary condition response level); Second, combustion process level (chiefly refer to apparent heat release rate, in-cylinder pressure, combustion phasing and combustion duration etc.); Third, in-cylinder micro-analysis level (chiefly refer to air fuel mixing energy ME). The main contributor of performance deterioration is boundary conditions deviation which caused by inconsistent response delay due to turbocharger lag. The consequence of boundary condition deviation is air-fuel mixing energy (ME) reduction. The improved method is to increase air-fuel mixing energy to compensate the negative effect cause by turbocharged lag. This work increases ME by means of advancing injection timing. The results indicates that: The BTE increases 2.2% and smoke decreases 12.1% as the injection timing advances 2 °CA, compared with the level under original injection timing. Therefore increasing ME can alleviate transient operation deterioration by improving the quality air-fuel mixture formation.

Suggested Citation

  • Han, Yongqiang & Zhang, Longping & Liu, Zhongchang & Tian, Jing, 2016. "Investigation of transient deterioration mechanism and improved method for turbocharged diesel engine," Energy, Elsevier, vol. 116(P1), pages 250-264.
    • Handle: RePEc:eee:energy:v:116:y:2016:i:p1:p:250-264
    DOI: 10.1016/j.energy.2016.09.088
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    References listed on IDEAS

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    1. Rakopoulos, C.D. & Antonopoulos, K.A. & Rakopoulos, D.C., 2007. "Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends," Energy, Elsevier, vol. 32(10), pages 1791-1808.
    2. Armas, Octavio & Ballesteros, Rosario & Cardenas, María Dolores, 2012. "Thermodynamic diagnosis of diesel and biodiesel combustion processes during load-increase transient sequences," Applied Energy, Elsevier, vol. 97(C), pages 558-568.
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    Cited by:

    1. Qiang Liu & Zhongchang Liu & Yongqiang Han & Jing Tian & Jun Wang & Jian Fang, 2018. "Experimental Investigation of the Loading Strategy of an Automotive Diesel Engine under Transient Operation Conditions," Energies, MDPI, vol. 11(5), pages 1-15, May.
    2. Zhongchang Liu & Xing Yuan & Jing Tian & Yongqiang Han & Runzhao Li & Guanlong Gao, 2018. "Investigation of Sectional-Stage Loading Strategies on a Two-Stage Turbocharged Heavy-Duty Diesel Engine under Transient Operation with EGR," Energies, MDPI, vol. 11(1), pages 1-19, January.
    3. Ettefaghi, Ehsanollah & Rashidi, Alimorad & Ghobadian, Barat & Najafi, G. & Ghasemy, Ebrahim & Khoshtaghaza, Mohammad Hadi & Delavarizadeh, Saman & Mazlan, Mohamed, 2021. "Bio-nano emulsion fuel based on graphene quantum dot nanoparticles for reducing energy consumption and pollutants emission," Energy, Elsevier, vol. 218(C).

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