Research of the efficiency of using the Miller cycle of an internal combustion engine

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Abstract


The article is devoted to the study of the possibilities of improving the technical and economic indicators of an internal combustion engine (ICE) through the use of the Miller cycle with a shortened intake. A review of scientific works on the use of the Atkinson cycle and Miller cycle in an internal combustion engine is carried out. A comparative analysis of theoretical cycles: Otto cycle, Atkinson cycle and Miller cycle is carried out. Calculated studies of the influence of the expansion ratio and the pressure increase ratio on the efficiency of the Atkinson cycle have been carried out. The ratios are presented that allow using the Miller cycle with a short inlet to obtain the same theoretical efficiency of the cycle as that of the Atkinson cycle. At the same time, the implementation of the Miller cycle in a real engine design significantly exceeds the possibilities of using the Atkinson cycle. The results of the study showed that the use of the Miller cycle with a shortened intake is preferable, but it must necessarily increase the compression ratio and intake pressure through the use of boost. On the example of real data of the main parameters of the cycle, it is shown that the use of the theoretical Miller cycle can provide a significant up to 12.2% increase in the efficiency of the cycle compared to the Otto cycle. The ratios, conditions and recommendations are presented that allow the effective use of the Miller cycle with a shortened intake in a real engine design.


About the authors

Sergei V. Smirnov

Peoples’ Friendship University of Russia (RUDN University)

Author for correspondence.
Email: smirnov-sv@rudn.ru
ORCID iD: 0000-0002-8887-1745
6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Associate Professor at the Department of Mechanical Engineering and Instrument Engineering, Engineering Academy, Candidate of Technical Sciences

Alexander R. Makarov

Peoples’ Friendship University of Russia (RUDN University)

Email: makarov-ar@rudn.ru
ORCID iD: 0000-0001-6895-3076
6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Professor at the Department of Mechanical Engineering and Instrument Engineering, Engineering Academy, Candidate of Technical Sciences

Ivan A. Zaev

Peoples’ Friendship University of Russia (RUDN University)

Email: i_zaev@mail.ru
ORCID iD: 0000-0002-2498-9197
6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Leading Scientist at Engineering Academy, Candidate of Physical and Mathematical Sciences

Gulnara T. Khudaibergenova

Peoples’ Friendship University of Russia (RUDN University)

Email: 1032155550@rudn.ru
6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Master’s student at the Department of Mechanical Engineering and Instrument Engineering, Engineering Academy

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Copyright (c) 2021 Smirnov S.V., Makarov A.R., Zaev I.A., Khudaibergenova G.T.

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