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Analysis and Multi-Parametric Optimisation of the Performance and Exhaust Gas Emissions of a Heavy-Duty Diesel Engine Operating on Miller Cycle

Author

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  • Charalampos Georgiou

    (Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK)

  • Ulugbek Azimov

    (Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK)

Abstract

A major issue nowadays that concerns the pollution of the environment is the emissions emerging from heavy-duty internal combustion engines. Such concern is dictated by the fact that the electrification of heavy-duty transport still remains quite challenging due to limitations associated with mileage, charging speed and payload. Further improvements in the performance and emission characteristics of conventional heavy-duty diesel engines are required. One of a few feasible approaches to simultaneously improve the performance and emission characteristics of a diesel engine is to convert it to operate on Miller cycle. Therefore, this study was divided into two stages, the first stage was the simulation of a heavy-duty turbocharged diesel engine (4-stroke, 6-cylinder and 390 kW) to generate data that will represent the reference model. The second stage was the application of Miller cycle to the conventional diesel engine by changing the degrees of intake valve closure and compressor pressure ratio. Both stages have been implemented through the specialist software which was able to simulate and represent a diesel engine based on performance and emissions data. An objective of this extensive investigation was to develop several models in order to compare their emissions and performances and design a Miller cycle engine with an ultimate goal to optimize diesel engine for improved performance and reduced emissions. This study demonstrates that Miller cycle diesel engines could overtake conventional diesel engines for the reduced exhaust gas emissions at the same or even better level of performance. This study shows that, due to the dependence of engine performance on complex multi-parametric operation, only one model achieved the objectives of the study, more specifically, engine power and torque were increased by 5.5%, whilst nitrogen oxides and particulate matter were decreased by 30.2% and 5.5%, respectively, with negligible change in specific fuel consumption and CO 2 , as average values over the whole range of engine operating regimes.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3724-:d:386929
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    References listed on IDEAS

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    1. Rinaldini, Carlo Alberto & Mattarelli, Enrico & Golovitchev, Valeri I., 2013. "Potential of the Miller cycle on a HSDI diesel automotive engine," Applied Energy, Elsevier, vol. 112(C), pages 102-119.
    2. Gonca, Guven & Sahin, Bahri & Parlak, Adnan & Ayhan, Vezir & Cesur, İdris & Koksal, Sakip, 2015. "Application of the Miller cycle and turbo charging into a diesel engine to improve performance and decrease NO emissions," Energy, Elsevier, vol. 93(P1), pages 795-800.
    3. 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.
    4. Gonca, Guven & Sahin, Bahri & Parlak, Adnan & Ust, Yasin & Ayhan, Vezir & Cesur, İdris & Boru, Barış, 2015. "Theoretical and experimental investigation of the Miller cycle diesel engine in terms of performance and emission parameters," Applied Energy, Elsevier, vol. 138(C), pages 11-20.
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