首页 | 本学科首页   官方微博 | 高级检索  
     

Negative Valve Overlap Mode of HCCI Operation Using Gasoline and Diesel Blended Fuels
引用本文:钟绍华,陈永东,Miroslaw Lech Wyszynski,徐宏明. Negative Valve Overlap Mode of HCCI Operation Using Gasoline and Diesel Blended Fuels[J]. 天津大学学报(英文版), 2007, 13(6)
作者姓名:钟绍华  陈永东  Miroslaw Lech Wyszynski  徐宏明
作者单位:Wuhan University of Technology,Wuhan University of Technology,The University of Birmingham,The University of Birmingham Wuhan 430070,China,Wuhan 430070,China,Birmingham B15 2TT,UK,Birmingham B15 2TT,UK
基金项目:Supported by the Engineering and Physical Sciences Research Council of the UK(No58338/01)
摘    要:The negative valve overlap (NVO) strategy of HCCI operation was experimentally investigated on a gasoline HCCI engine operated with variable valve timing in association with the addition of diesel fuel. The experimental results show that, by using gasoline and diesel blended fuels, the required NVO interval for suitable HCCI combustion under a given engine speed and a moderate compression ratio condition could be reduced, and the HCCI combustion region was extended remarkably without substantial increase in NOx emissions under a given inlet and exhaust valve timing due to the improvement of charge ignitability. In addition, the possible scale of NVO was extended. A substantial increase in the lean limit of excess air ratio and the upper limit of load range can be achieved because of higher volumetric efficiency, resulting from the decrease in the required NVO and the presence of less residual gases in cylinder.


Negative Valve Overlap Mode of HCCI Operation Using Gasoline and Diesel Blended Fuels
ZHONG Shaohua,CHEN Yongdong,Miroslaw Lech Wyszynski,XU Hongming. Negative Valve Overlap Mode of HCCI Operation Using Gasoline and Diesel Blended Fuels[J]. Transactions of Tianjin University, 2007, 13(6)
Authors:ZHONG Shaohua  CHEN Yongdong  Miroslaw Lech Wyszynski  XU Hongming
Abstract:The negative valve overlap (NVO) strategy of HCCI operation was experimentally investigated on a gasoline HCCI engine operated with variable valve timing in association with the addition of diesel fuel. The experimental results show that, by using gasoline and diesel blended fuels, the required NVO interval for suitable HCCI combustion under a given engine speed and a moderate compression ratio condition could be reduced, and the HCCI combustion region was extended remarkably without substantial increase in NOx emissions under a given inlet and exhaust valve timing due to the improvement of charge ignitability. In addition, the possible scale of NVO was extended. A substantial increase in the lean limit of excess air ratio and the upper limit of load range can be achieved because of higher volumetric efficiency, resulting from the decrease in the required NVO and the presence of less residual gases in cylinder.
Keywords:homogeneous charge compression ignition (HCCI)  negative valve overlap(NVO)  combustion  blended fuels
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号