A Study on the Influence of the Miller Cycle upon the Engine’s Internal Aerodynamics

A Study on Combustion Characteristics of Spark-Ignited Engine with Different Late Intake Valve Closing for Miller Cycle

Journal of ILASS-Korea ◽

10.15435/jilasskr.2015.20.3.141 ◽

2015 ◽

Vol 20 (3) ◽

pp. 141-148

Author(s):

J.H. Chung ◽

S.J. Kang ◽

J.S. Kim ◽

S.C. Jeong ◽

J.W. Lee

Keyword(s):

Combustion Characteristics ◽

Miller Cycle ◽

Intake Valve

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A Theoretical Study on the Thermodynamic Cycle of Concept Engine with Miller Cycle

Processes ◽

10.3390/pr9061051 ◽

2021 ◽

Vol 9 (6) ◽

pp. 1051

Author(s):

Jungmo Oh ◽

Kichol Noh ◽

Changhee Lee

Keyword(s):

Compression Ratio ◽

Thermal Efficiency ◽

Engine Performance ◽

Thermodynamic Cycle ◽

Expansion Ratio ◽

Boost Pressure ◽

Miller Cycle ◽

Compression Pressure ◽

Air Mass ◽

Atkinson Cycle

The Atkinson cycle, where expansion ratio is higher than the compression ratio, is one of the methods used to improve thermal efficiency of engines. Miller improved the Atkinson cycle by controlling the intake- or exhaust-valve closing timing, a technique which is called the Miller cycle. The Otto–Miller cycle can improve thermal efficiency and reduce NOx emission by reducing compression work; however, it must compensate for the compression pressure and maintain the intake air mass through an effective compression ratio or turbocharge. Hence, we performed thermodynamic cycle analysis with changes in the intake-valve closing timing for the Otto–Miller cycle and evaluated the engine performance and Miller timing through the resulting problems and solutions. When only the compression ratio was compensated, the theoretical thermal efficiency of the Otto–Miller cycle improved by approximately 18.8% compared to that of the Otto cycle. In terms of thermal efficiency, it is more advantageous to compensate only the compression ratio; however, when considering the output of the engine, it is advantageous to also compensate the boost pressure to maintain the intake air mass flow rate.

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Numerical investigation of a new combined energy cycle based on Miller cycle, Organic Rankine cycle, Stirling engine and alkaline fuel cell

Energy Reports ◽

10.1016/j.egyr.2021.08.111 ◽

2021 ◽

Vol 7 ◽

pp. 5406-5419

Author(s):

Xin Yu ◽

Chen She ◽

Farid Gholizadeh ◽

Yi-Peng Xu

Keyword(s):

Fuel Cell ◽

Numerical Investigation ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Stirling Engine ◽

Alkaline Fuel Cell ◽

Miller Cycle ◽

Energy Cycle

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Miller cycle and wet ethanol injection for high efficiency and low NOx emissions on a HD diesel engine

10.5151/simea2021-pap89 ◽

2021 ◽

Author(s):

Vinicius Bernardes Pedrozo ◽

Thompson Diórdinis Metzka Lanzanova ◽

Hua Zhao ◽

Lincoln Prado Ferreira

Keyword(s):

Diesel Engine ◽

High Efficiency ◽

Nox Emissions ◽

Miller Cycle ◽

Ethanol Injection

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Status of Centrifugal Impeller Internal Aerodynamics—Part II: Experiments and Influence of Viscosity

Journal of Engineering for Power ◽

10.1115/1.3230333 ◽

1980 ◽

Vol 102 (3) ◽

pp. 738-746 ◽

Cited By ~ 3

Author(s):

D. Adler

Keyword(s):

Viscous Flow ◽

Experimental Work ◽

State Of The Art ◽

Centrifugal Impeller ◽

Future Research ◽

Research Topics ◽

Flow Problems ◽

Recent Developments ◽

Internal Aerodynamics ◽

The Subject

Recent developments in internal viscous aerodynamics of centrifugal impellers and related flows are critically reviewed. The overall picture which emerges provides the reader with a state-of-the-art perspective on the subject. Gaps in understanding are identified to stimulate future research. Topics included in this review are: experimental work carried out in the last decade, the structure of turbulence in curved rotating passages and solution of viscous flow problems in impellers.

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