The effect of variable swirl on the fuel consumption of SI engine when TEFI (Twice Electronic fuel Injection) was adopted to lean burn combustion was studied.

主要研究了火花点燃式发动机采用二次喷油技术实现稀薄燃烧时，可变涡流对燃油经济性的影响情况。

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Lean burn; Twice electronic fuel injection; Quasi-homogenous mixture; 2-valve SI engine;

稀薄燃烧；两次喷油；准均质混合气；二气门汽油机；

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Lean burn; Twice electronic fuel injection; Quasi-homogenous mixture; 2-valve SI engine;

稀薄燃烧；两次喷油；准均质混合气；二气门汽油机；

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