Studies on internal combustion engines have made great efforts to develop engines with high efficiency for energy saving and emission gas reduction. The thermal efficiency of an internal combustion engine can be increased by expanding the pressure energy obtained through combustion to the maximum extent to convert the supplied thermal energy into work to the maximum extent. The cycle that can realize this goal is the Miller cycle. This Miller cycle converts the supplied thermal energy into mechanical energy to the maximum extent by making the expansion ratio greater than the compression ratio by changing the intake valve close timing. It is essential that study be performed for the development of the engine with high efficiency for energy saving in this era of rising oil prices. Therefore, this study realized a low compression and high expansion ratio engine by changing the intake valve close timing in order to investigate the characteristics of the Miller cycle. Furthermore, it confirmed that both the compression pressure and maximum combustion pressure increased through thermodynamic analysis. In addition, using the engine analysis program developed by the Ricardo Company known as WAVE, this study obtained the result that the output, torque and break thermal efficiency increased by 2 PS, 1.5kg and 2%, respectively at WOT (Wide Open Throttle) position and ABDC55° through simulation by changing the intake valve close timing.
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ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference
March 13–16, 2007
Pueblo, Colorado, USA
Conference Sponsors:
- Rail Transportation Division and Internal Combustion Engine Division
ISBN:
0-7918-4787-X
PROCEEDINGS PAPER
An Experimental and Numerical Study of a Miller Cycle for a Gas Engine Converted From a Diesel Engine
Gyeung Ho Choi,
Gyeung Ho Choi
Keimyung University, Daegu, South Korea
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Tae Kwon Kim,
Tae Kwon Kim
Keimyung University, Daegu, South Korea
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Boo Youn Lee,
Boo Youn Lee
Keimyung University, Daegu, South Korea
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Ju Hee Lee,
Ju Hee Lee
Keimyung University, Daegu, South Korea
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Yon Jong Chung,
Yon Jong Chung
Daegu Mirae College, Pyungsan, Kyongsan, South Korea
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Sung Bin Han
Sung Bin Han
Induk Institute of Technology, Seoul, South Korea
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Gyeung Ho Choi
Keimyung University, Daegu, South Korea
Tae Kwon Kim
Keimyung University, Daegu, South Korea
Boo Youn Lee
Keimyung University, Daegu, South Korea
Ju Hee Lee
Keimyung University, Daegu, South Korea
Yon Jong Chung
Daegu Mirae College, Pyungsan, Kyongsan, South Korea
Sung Bin Han
Induk Institute of Technology, Seoul, South Korea
Paper No:
JRC/ICE2007-40078, pp. 471-476; 6 pages
Published Online:
June 5, 2009
Citation
Choi, GH, Kim, TK, Lee, BY, Lee, JH, Chung, YJ, & Han, SB. "An Experimental and Numerical Study of a Miller Cycle for a Gas Engine Converted From a Diesel Engine." Proceedings of the ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. Pueblo, Colorado, USA. March 13–16, 2007. pp. 471-476. ASME. https://doi.org/10.1115/JRC/ICE2007-40078
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