现生产缸盖进气道与座圈错位问题的分析与改进-电子报刊 关键词 ：缸盖、进气道、错位、流量系数、滚流比[gap=1007]Key Words: Cylinder Head; Intake Port;Misalignment; Flow Coefficient; Tumble Ratio
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The tumble ratio is weakened as the maximum valve lift decreases, and strengthened slightly as engine speed increases.
滚流比随气门升程的降低呈减小趋势;随发动机转速的升高而有小幅增大。
参考来源 - 可变气门驱动对汽油机缸内气体流动特性及整机性能影响的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
据此建立了缸内滚流比预测模型，并在稳流试验和拖动工况下缸内流动的LDA测量试验中得到验证。
A model for predicting the tumble speed is derived and verified by the steady flow rig and the in-cylinder flow measurement results by a LDA system.
推荐可变压缩比（VCR）方案、可变废气再循环率（EGR）方案、可变排气门关闭时刻方案，以及废气再循环滚流分层充气方案等。
Schemes of variable compression ratio (VCR), variable exhaust gas recirculation (EGR), variable exhaust valve timing, and EGR with stratification by tumble charge flow are recommended.
应用推荐