China Mechanical Engineering ›› 2022, Vol. 33 ›› Issue (15): 1882-1889.DOI: 10.3969/j.issn.1004-132X.2022.15.015

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Drag Torque Algorithm of Wet DCT and Its ApplicationsLIU Bo

ZHANG Xingui;SHI Xinglei;YU Zilin;ZHONG Zhenyuan;LI Jia   

  1. GAC Automotive Research & Development Center,Guangzhou,511434
  • Online:2022-08-10 Published:2022-09-01

湿式双离合器拖曳力矩算法及其应用

刘波;张新桂;石兴磊;余子林;钟振远;李佳   

  1. 广州汽车集团股份有限公司汽车工程研究院,广州,511434
  • 通讯作者: 张新桂(通信作者),男,1983年生,工程师。研究方向为汽车混动传动系统设计。E-mail:zhangxingui@gacrnd.com。
  • 作者简介:刘波,男,1971年生,博士、高级工程师。研究方向为汽车混动传动系统设计。获美国、日本授权发明专利各1项,发表论文2篇。E-mail:liubo@gacrnd.com。

Abstract: One type of wet DCT was taken as research subject, and the mechanism of output torque variations of the DCT for cars was analyzed in neutral/park positions while creeping or idling respectively. By building the mathematical model of the output torque, theoretical calculation formulas of the equivalent radius of lubricating oil film between DCT plates, the max drag torque and the critical rotational speed were figured out, and the dynamic interactions of three elements were illuminated. The accuracy was proved by experimental data, which may be used to reduce output torque fluctuation, drag torques and critical rotational speeds. 

Key words:  , dual clutch transmission(DCT), torque model, equivalent radius, critical rotational speed, drag torque

摘要: 以某湿式双离合器总成为研究对象,分析了湿式双离合车辆在空挡(N挡)、驻车(P挡)怠速、蠕行过程中,离合器的输出扭矩变化机理;通过搭建输出扭矩的数学模型,得出了离合器片间隙润滑油膜的当量半径、峰值力矩、临界转速的理论计算公式,阐明了三者相互影响的动态关系;结合实验数据,论证了该模型的准确性,运用该模型可减小输出端扭矩波动、拖曳力矩和临界转速。

关键词: 双离合器传动, 扭矩模型, 当量半径, 临界转速, 拖曳力矩

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