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在汽油机低压供油的前提下，提出了“气道内二次燃油喷射”的概念，用于优化缸内混合气的分布， 消除传统单次喷油分层燃烧所存在的弊端。在发动机的一个工作循环内，第１次喷射的燃油在缸内形成 均质稀混合气，第２次喷射的燃油将火花塞周围适当加浓。在自行设计的五气门汽油机上所进行的初步 试验证明：与普通稀燃单次喷油方式相比，这种新喷油方式能够提高发动机稀燃能力２个空燃比单位， 具有显著降低燃油消耗的作用。
Under the premise of low pressure gasoline engine, the concept of “secondary fuel injection in the air passage” is put forward to optimize the distribution of the mixture in the cylinder and eliminate the disadvantages of the traditional single fuel injection stratified combustion. In a working cycle of the engine, the first injection of fuel in the cylinder to form a homogeneous lean mixture, the second injection of fuel around the spark plug enrichment. Preliminary tests carried out on self-designed five-valve gasoline engines demonstrate that this new fuel injection method can increase engine lean burn capacity by 2 A / F units compared to conventional lean-burn single-fuel injection systems, with a significant reduction in fuel consumption Role.