进气道生产一致性对汽油机性能影响及设计优化  

Effect of Product Uniformity of Intake Port on Gasoline Engine Performance and its Design Optimization

作　　者：杨俊伟[1] 刘国庆[1] 刘华龙[1] 张振兴[1] 江涛[1] 

机构地区：[1]奇瑞汽车股份有限公司发动机工程研究院,安徽芜湖241009

出　　处：《小型内燃机与摩托车》2014年第1期40-45,共6页Small Internal Combustion Engine and Motorcycle

基　　金：国家科技支撑计划(2011BAG06B00)

摘　　要：采用AVL TIPPLEMAN气道稳态试验台对某现生产气道喷射汽油机缸盖气道性能进行批量测试,结果显示该发动机缸盖气道生产一致性较差。选择了其中高中低3种滚流水平缸盖进行发动机性能试验。试验发现,生产偏差造成的滚流差异对性能有较大的影响,低滚流气道有利于该发动机外特性提升。为此进行了进气道性能鲁棒性CFD模拟分析,研究了气道偏移对气道性能的影响,并通过优化气道局部结构,显著改善了缸盖气道性能设计鲁棒性,优化后气道滚流对气道偏移的敏感度降低了50%,并进行了气道试验验证和发动机性能试验。Abstract： The intake port performance of a production gasoline engine is tested by AVL Tippleman port flow test bench. The result shows that the uniformity of intake port performance is worse than expected. Three cyl- inder heads with low, medium and high tumble level are selected to compare the engine performance on engine I）YNO. It is found that the tumble difference of intake port produced during manufacture has a remarkable effect on engine performance, and low tumble level intake port is beneficial to increase full load performance. Therefore the robustness of intake port performance to this engine is analyzed by CFD method and the port shift effect on intake port performance is studied. Through the part structure of intake port optimization, the robust- ness of intake port performance is improved significantly. The sensitivity to port shift of intake port tumble ratio is decreased by 50 %, and it is verified by port flow test and engine performance test on engine DYNO.

关 键 词：汽油机 进气道 滚流 发动机性能 设计鲁棒性 CFD 优化 

分 类 号：TN413.44[电子电信—微电子学与固体电子学]