Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (6): 18-23.doi: 10.3969/j.issn.1000-565X.2011.06.004

• Mechanical Engineering • Previous Articles     Next Articles

Shift Characteristics of Mechanical Transmission Without Torque Interrupt

Liu Yan-weiZhao Ke-gangHuang Xiang-dong1,2  Yang Rong-shan2   

  1. 1. Guangdong Provincial Key Laboratory of Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Automotive Engineering Institute,Guangzhou Automobile Group Corporation,Ltd.,Guangzhou 510640,Guangdong,China
  • Received:2010-10-29 Revised:2011-03-14 Online:2011-06-25 Published:2011-05-06
  • Contact: 刘延伟(1985-) ,男,博士生,主要从事车辆系统动力学和自动变速理论研究. E-mail:yw.liu@ foxmail.com
  • About author:刘延伟(1985-) ,男,博士生,主要从事车辆系统动力学和自动变速理论研究.
  • Supported by:

    国家自然科学基金资助项目( 50805049)

Abstract:

In this paper,the shift principle of mechanical transmission without torque interrupt is analyzed,and a dynamic model describing the shift process is established. Then,a shift strategy for the transmission under discussion is proposed based on the prearranged control of clutch torque capacity. Moreover,a simulation model of the transmission is set up with the Matlab /Simulink software. Finally,for the purpose of optimizing the shift quality in terms of jerk and slipping work,the control parameters of throttle opening during the shifting is calculated by using the the simplex method and the genetic algorithm. Simulated results indicate that,with the adoption of the designed control strategy and the optimized control parameters,both the shift shock and the clutch slip during the shifting are successfully controlled,and a continuous and smooth power output is thus secured.

Key words: mechanical transmission, shift control, shift quality, genetic algorithm