双离合器变速器速比的设计计算与分析2.pdf

42 机械传动 2011 年 文章编号: 1004- 2539( 2011) 12- 0042- 04 双离合器变速器速比的设计计算与分析 李 晏 李 炎 陈辛波 邵 焕 ( 同济大学 机械工程学院, 上海 201804) 摘要 DCT 是近来出现的一种具有双离合器结构的新型自动变速器, 实现了换挡过程的动力换挡, 换挡平滑而迅速。阐述了如何确定变速器最高挡、最低挡传动比的范围及总挡位数, 如何运用等比级 数、偏置等比级数对速比进行分配, 并选用 VB 软件完成了速比的基于计算机的快速初选及分配; 最后 基于整车参数及发动机特性, 运用 Cruise 软件建立了 DCT 车辆的整车模型, 整车动力性和 ENDC 燃油经 济性的计算机模拟仿真, 对速比的性能进行了较全面的评价并根据燃油经济性- 加速时间曲线完成了 速比的优化。 关键词 速比范围 等比级数 偏置等比级数 动力性 燃油经济性 速比优化 Design Calculation and Analysis of Dual Clutch Transmission Gear Ratio Li Yan Li Yan Chen Xinbo Shao Huan ( College of Mechanical Engineering, Tongji University, Shanghai 201804, China) Abstract DCT is a new kind of automatic transmission with dual clutch, which realizes power shift, and the process of shifting is smooth and rapid. How to determine the scope of transmission ratio and the number of speed gears, how to distribute the gear ratio with geometric progression and partial geometric progression are expound. The initial selection and distribution of gear ratio was completed rapidly by VB software. DCT vehicle model is created based on vehicle parameter and engine characteristic for simulation of dynamic properties and ENDC fuel economy by the software Cruise to evaluate and optimize the performance of gear ratio. Key words Scope of gear ratio Geometric progression Partial geometric progression Dynamic property Fuel economy Gear ratio optimize 性能分析。 0 引言