四气门柴油机进气道组合对涡流和流量影响的研究

四气门柴油机进行气道可以选用不同类型的进气道进行组合，如二个螺旋进气道、二个切向进气道或一个切向进气道一个螺旋进气道等。螺旋进气道和切向进气道气门出口处气流分布不同，不同的气道组合对进气涡流影响必然不同。本文介绍了在气道稳流试验台上进行试验研究的结果。

A Study of the Influence of the Different Inlet - Port Combination the Swirl Ratio and Airflow in the Four - Valve Diesel Engine

There are some different ways of arranging porting for the four-valve diesel engine, such as two helical intake ports, two tangential intake ports or one helical port and one tangential port etc. The helical intake port and the tangential intake port have different velocity distribution in cylinder, so the different inlet-port combination must result in the different airflow rate and the swirl ratio. This paper describes the results that the authors have investigated in the steady-flow rig.