首先，研究了直喷汽油机滚流稀薄燃烧系统的组成、结构及其控制。
Firstly, this paper studies the components, structure and control of the tumble-stratification lean combustion system on GDI engine.
结果表明，该直喷汽油机具有较强的滚流性能，有利于分层混合气的形成和稀薄燃烧。
The results show that a rather strong tumble motion exists in this GDI engine, which is beneficial to the formation of stratified mixture and lean combustion.
通过稳流气道试验和CFD瞬态数值模拟研究了4g15型直喷汽油机的进气滚流特性。
The intake flow tumble characteristics of 4g15 GDI engine are analyzed by using both flow rig and CFD transient numerical simulation.
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