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.
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。
2
The stratified lean burn is achieved. The numerical study on the working process of this engine is complicated and the feasibility is validated.