Influence of exhaust valve opening timing on gas exchange process in internal combustion engine

被引：0
|
作者：
Shang, Yong [1 ]
Liu, Fu-Shui [1 ]
Wang, Ya-Li [1 ]
机构：
[1] School of Mechanical and Vehicular, Beijing Institute of Technology, Beijing, China
来源：
Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering | 2015年 / 36卷 / 02期
关键词：
1-D simulation - Exhaust valves - Gas exchange process - High-speed conditions - IC engines - Judge criterion - Pumping pressure - Supercritical exhausts;
D O I：
10.13949/j.cnki.nrjgc.2015.02.002
中图分类号：
学科分类号：
摘要：
The effect of exhaust valve opening advance angle (EVOAA) on high speed condition points on engine full load speed characteristics was analyzed by using 1D simulation and experiments. Results show that too large EVOAA causes pumping loss and effective expand work decreasing, while too small EVOAA makes pumping loss increasing much more. The best EVOAA should be determined to make supercritical exhaust process ending at 10 °CA before exhaust BDC. The objective diesel engine EVOAA is optimized, realizing BMEP increase by 1.3%, mean effective pumping pressure decrease by 35.4% and total exhaust loss decrease by 37%. ©, 2015, Chinese Society for Internal Combustion Engines. All right reserved.
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页码：7 / 12
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