A wedge clutch with a wedge ramp transfers the tangential force to an axial force. It has unique features of self-reinforcement and small actuation force, and can be packaged into tight spaces. This wedge clutch can be developed to apply to an automatic transmission (AT) or a hybrid transmission.This paper focuses on the simulation of one wedge clutch in AT during shifting. A mathematical formula is given to describe the self-reinforcement principle of the wedge. The dynamic model of a motor actuated wedge clutch during shifting is built to simulate and develop the control algorithm. The model is implemented in Matlab/Simulink, which includes a DC motor model, a dynamic model of the wedge mechanism and clutch pack, and a driveline model of AT which can simulate a gear shift process.The key characteristics such as variation of normal pressure, response time and energy consumption are evaluated, and the results show a favorable comparison with the traditional hydraulic clutch.


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    Title :

    Modeling of a Wedge Clutch in an Automatic Transmission


    Additional title:

    Sae Technical Papers


    Contributors:
    Yin, Chengliang (author) / Kao, Chi-Kuan (author) / Lee, Chunhao (author) / Samie, Farzad (author) / Yao, Jian (author) / Shu, Jie (author) / Hebbale, Kumaraswamy (author) / Chen, Li (author) / Zheng, Xin (author) / Dong, Yu (author)

    Conference:

    SAE 2010 World Congress & Exhibition ; 2010



    Publication date :

    2010-04-12




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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