Modeling of a Wedge Clutch in an Automatic Transmission

2010-01-0186

04/12/2010

Event
SAE 2010 World Congress & Exhibition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2010-01-0186
Pages
9
Citation
Yao, J., Chen, L., Yin, C., Shu, J. et al., "Modeling of a Wedge Clutch in an Automatic Transmission," SAE Technical Paper 2010-01-0186, 2010, https://doi.org/10.4271/2010-01-0186.
Additional Details
Publisher
Published
Apr 12, 2010
Product Code
2010-01-0186
Content Type
Technical Paper
Language
English