液力机械自动变速器动力性换挡点算法研究.pdf

设计计算研究
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液力机械自动变速器动力性换挡点算法研究*
李春芾 1 陈慧岩 1 郑广军 2 李艳琴 2
北京理工大学内蒙古交通职业技术学院
(1. ;2. )
为得到发动机与液力变矩器共同工作点及动力性换挡点精确计算结果对发动机净转矩外特性曲线采
【摘要】,
用三次样条插值并构造了求解共同工作点及动力性换挡点的求值函数分别采用改进二分法和牛顿下山法来求解
, ,
构造函数零值通过实例计算和分析表明这种方法运行速度快精度高求得的动力性换挡特性提高了液力传动
。, 2 、,
车辆的匹配效率
。
主题词:液力机械自动变速器动力性换挡点算法
中图分类号:+1 文献标识码:A 文章编号:1000-3703(2010)04-0042-04
Study on the Calculation Method of the Power Shift Point of Hydro-
mechanical Automatic Transmission
Li Chunfu1, Chen Huiyan1, Zheng Guangjun2, Li Yanqin2
(1. Beijing Institute of Technology; 2. Inner munications Polytechnic)
【Abstract】To obtain mon operating point of engine and torque converter and an accurate calculation result
of the power shifting point, cubic spline interpolation is adopted for the exterior characteristic of torque, and the
evaluation function is established to solve mon operating point and power shifting point, and the modified
dichotomy and Newton Downhill Method are employed respectively to solve zeros of constructed function. The example
calculation and analysis indicate that the two methods operate with rapid speed and high precision, the obtained power
shifting characteristic improves matching efficiency of vehicle with hydraulic transmission.
Key words: Hydro-mechanical transmission, Power shifting point, Calculation method
大量数据需要确定特别对装有液力变矩器的自动
前言,
1 变速器更是如此常用较简化的作