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The effects of early inlet valve closing and cylinder disablement on fuel economy and emissions of a direct injection diesel engine

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  • Zammit, J.P.
  • McGhee, M.J.
  • Shayler, P.J.
  • Law, T.
  • Pegg, I.

Abstract

The influence of EIVC (early inlet valve closure) on emissions, fuel economy and exhaust gas temperature of a turbocharged, 4 cylinder common rail direct injection diesel engine has been investigated and compared with the influence of deactivating two cylinders. IVC (inlet valve closing) timings were set at up to 60 CA (crank angle) degrees earlier than the production setting of 37° ABDC for the engine. At the earliest timing, effective compression ratio was reduced from 15.2:1 to 13.7:1. The effects on emissions were significant only for EIVC settings at least 40 CA degrees earlier than the production setting, and were sensitive to engine load. At 2 bar BMEP (brake mean effective pressure) and fixed levels of NOx, soot emissions were reduced but CO (carbon monoxide) and HC (hydrocarbon) increased unless fuel rail pressure was reduced. With increasing load, soot reduction diminished and was negligible at 6 bar BMEP; CO and HC emissions deteriorated further. At all conditions, EIVC raised exhaust gas temperature by >50 °C; the effect on fuel economy was negligible or a fuel economy penalty. Comparisons indicate cylinder deactivation is the more effective strategy for reducing engine-out emissions of HC and CO and raising exhaust gas temperature under light load operating conditions.

Suggested Citation

  • Zammit, J.P. & McGhee, M.J. & Shayler, P.J. & Law, T. & Pegg, I., 2015. "The effects of early inlet valve closing and cylinder disablement on fuel economy and emissions of a direct injection diesel engine," Energy, Elsevier, vol. 79(C), pages 100-110.
    • Handle: RePEc:eee:energy:v:79:y:2015:i:c:p:100-110
    DOI: 10.1016/j.energy.2014.10.065
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    References listed on IDEAS

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    1. Jia, Ming & Li, Yaopeng & Xie, Maozhao & Wang, Tianyou, 2013. "Numerical evaluation of the potential of late intake valve closing strategy for diesel PCCI (premixed charge compression ignition) engine in a wide speed and load range," Energy, Elsevier, vol. 51(C), pages 203-215.
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    Cited by:

    1. Charalampos Georgiou & Ulugbek Azimov, 2020. "Analysis and Multi-Parametric Optimisation of the Performance and Exhaust Gas Emissions of a Heavy-Duty Diesel Engine Operating on Miller Cycle," Energies, MDPI, vol. 13(14), pages 1-25, July.
    2. Zhijian Wang & Shijin Shuai & Zhijie Li & Wenbin Yu, 2021. "A Review of Energy Loss Reduction Technologies for Internal Combustion Engines to Improve Brake Thermal Efficiency," Energies, MDPI, vol. 14(20), pages 1-18, October.
    3. Balerna, Camillo & Lanzetti, Nicolas & Salazar, Mauro & Cerofolini, Alberto & Onder, Christopher, 2020. "Optimal low-level control strategies for a high-performance hybrid electric power unit," Applied Energy, Elsevier, vol. 276(C).
    4. Marelli, Silvia & Marmorato, Giulio & Capobianco, Massimo, 2016. "Evaluation of heat transfer effects in small turbochargers by theoretical model and its experimental validation," Energy, Elsevier, vol. 112(C), pages 264-272.
    5. José R. Serrano & Francisco J. Arnau & Jaime Martín & Ángel Auñón, 2020. "Development of a Variable Valve Actuation Control to Improve Diesel Oxidation Catalyst Efficiency and Emissions in a Light Duty Diesel Engine," Energies, MDPI, vol. 13(17), pages 1-26, September.
    6. Triantafyllopoulos, Georgios & Kontses, Anastasios & Tsokolis, Dimitrios & Ntziachristos, Leonidas & Samaras, Zissis, 2017. "Potential of energy efficiency technologies in reducing vehicle consumption under type approval and real world conditions," Energy, Elsevier, vol. 140(P1), pages 365-373.
    7. Zhu, Dengting & Zheng, Xinqian, 2017. "Asymmetric twin-scroll turbocharging in diesel engines for energy and emission improvement," Energy, Elsevier, vol. 141(C), pages 702-714.
    8. Fridrichová, K. & Drápal, L. & Vopařil, J. & Dlugoš, J., 2021. "Overview of the potential and limitations of cylinder deactivation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 146(C).
    9. Norbert Zsiga & Johannes Ritzmann & Patrik Soltic, 2021. "Practical Aspects of Cylinder Deactivation and Reactivation," Energies, MDPI, vol. 14(9), pages 1-20, April.

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