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。
The stratified lean burn is achieved. The numerical study on the working process of this engine is complicated and the feasibility is validated.
本文对该种发动机的缸内工作过程进行了数值模拟，考察系统的可行性。
The stratified lean burn is achieved. The numerical study on the working process of this engine is complicated and the feasibility is validated.
本文对该种发动机的缸内工作过程进行了数值模拟，考察系统的可行性。
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