农业机械学报2011，Vol.42Issue(11)：15-18,26,5.
低压空气辅助缸内直喷汽油机进气道设计
Intake Port Design for Low-pressure Air-assisted In-cylinder Direct Injection Gasoline Engine
摘要
Abstract
Taking a 2. 0 L four-valve port fuel injection gasoline engine as prototype, the low-pressure air-assisted direct injection gasoline engine and its intake ports were developed and optimized by using CFD simulation technology combined with steady flow test method. The 3-D simulation model of the intake port was built with CFD software, and calculation and analysis were carried out then. The calculation values were in a good agreement with the steady flow test results, and the data showed that the intake port provided low intake capacity and high tumble motion. Analysis of 3-D flow field showed that there was gas retention phenomenon in some areas. After structure optimization of the intake port with CFD software according to the requirements of air-flow motion characters inside the cylinder, the tumble motion was weakened by increasing the cross-sectional area nearby the valve stem to improve its intake capacity, which also reduced the gas retention phenomenon.关键词
汽油机/缸内直接喷射技术/进气道/设计Key words
Gasoline engine/In-cylinder direct injection technology/Intake port/Design分类
能源科技引用本文复制引用
胡春明,武珊,詹樟松,于勇,吕永,张巍..低压空气辅助缸内直喷汽油机进气道设计[J].农业机械学报,2011,42(11):15-18,26,5.基金项目
国家高技术研究发展计划(863计划)资助项目(2008AA11A114)和天津大学内燃机燃烧学国家重点实验室资助项目 （863计划）
