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CSME 2018/04
Volume 39 No.2
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179-186
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A 1-D Numerical Analysis on the Control of HCCI Combustion in a CI Engine Through Exhaust Gas Recirculation
Duc-Khanh Nguyen a, Anh-Tuan Le, Thu-Huong Tran Thi and Ming-Hsun Wub
aSchool of Transportation Engineering, Hanoi University of Science and Technology, Hanoi 10000, Vietnam. (currently at Department of Mechanical Engineering, National Cheng Kung University, Taiwan)
bDepartment of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
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Abstract:
In this study, we investigated the potential of combustion control of a diesel engine operating in homogeneous charge compression ignition (HCCI) mode through 1 D engine gas dynamic simulation (AVL BOOST). Effects of p arameters including the content of residual gas, the ratio of external EGR, and its temperature on engine thermal efficiency were studied . The results showed that the engine efficiency increased with more residual gas at lean conditions. The temperature of recirculated exhaust gas is an important parameter for auto ignition timing control. As the exhaust gas temperature becomes higher, combustion initiation occurs earlier, further results in the reduction of engine efficiency. The indicated efficiency of the engine operating in HCCI mode peaks at 43.19% with lambda of 3.53 without EGR. The simulation predicts that the efficiency can be improved to 44.07% by using leaner mixture and EGR.
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Keywords: HCCI, exhaust gas recirculation, combustion control, engine 1-D simulation.
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©
2018
CSME , ISSN 0257-9731
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