4气门柴油机进气道及缸内流动特性的研究

Flow Characteristics Study on Inlet Passages of 4-Valve D.I.Diesel Engine

介绍了直喷式柴油机的 4气门进气系统。通过进行螺旋气道与变截面切向气道的组合试验 ,分析了不同流通截面等因素对气缸内涡流的影响。用热线风速仪测量缸内空气运动。讨论了 2个进气道和气缸内的流动规律 ,探讨了最佳涡流效果的 4气门进气系统的设计原则 。

WT5”BZ] Experiments of inlet ports with different inlet area are carried out.The flow characteristics of inlet passages and the impacts of different inlet port area on the flow rate,the swirl momentum are discussed.Otherwise,the ratio of the flow rate of tangential port and the flow rate of swirl port is the critical factor to form flow fields in cylinder.The best swirl momentum is formed under a specified flow rate relative between the tangential port and the swirl port. [WT5”HZ]