a kind of variable swirl intake system with subsidiary swirl controlled by air injection in the helical intake passage was developed, and the influence of this system on the emission performance of d.
研制了一种向螺旋进气道入口喷射空气的可变涡流进气系统——控制涡流型可变涡流进气系统 ,试验研究了该系统对直喷式柴油机排放性能的影响。