四气门柴油机进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流量和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。 Four-valve diesel inlet can choose to use different types of inlet combination, such as two spiral inlet, two tangential inlet or a tangential inlet a spiral inlet. The distribution of air flow at the outlet of the spiral inlet and the tangential inlet is different, and the effect of different airway combinations on the intake air flow and intake vortex is inevitably different. This article describes the results of experimental studies conducted on airway steady flow test benches.