This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of an Analytical Model for Prediction of Drag Torque Characteristics of Disengaged Wet Clutches in High Speed Region
Technical Paper
2017-01-1132
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Reduction of the drag torque and longevity of the clutch assembly are the most important factors for vehicle transmission improvement. The decreasing trend of the drag torque with speed after its peak is a common characteristic of the clutch assembly. Several theoretical models have been presented by the researchers describing the drag torque characteristics at lower clutch speed region. However, very little study has been made on the drag torque behavior at very high clutch speed region (6000~10000+ rpm). The unwanted occurrence of drag torque jump up at high speed operating condition remains unexplained till date. In this paper, we have investigated the possible reasons of torque jump up at high rotation speed and solution to overcome this problem. We have presented an analytical correlation of torque jump up with the excessive decrease of local static pressure and assumed that vacuum formation is one of the possible reasons of high speed torque rising and associated vibration. Result shows that when the separator plates are free for axial movement, a remarkable torque jump is observed. However, the drag torque jump up at higher speed can be eliminated by controlling the axial movement of separator plates by using separation springs or screws.
Recommended Content
Authors
Citation
Pahlovy, S., Mahmud, S., KUBOTA, M., Ogawa, M. et al., "Development of an Analytical Model for Prediction of Drag Torque Characteristics of Disengaged Wet Clutches in High Speed Region," SAE Technical Paper 2017-01-1132, 2017, https://doi.org/10.4271/2017-01-1132.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 |
Also In
References
- http://www.fueleconomy.gov/feg/atv.shtml
- Hashimoto H. , Wada S. and Murayama Y. 1984 The performance of a turbulent Lubricated Sliding Bearing Subject to Centrifugal Effects Trans. Jpn. Soc. Mech. Eng., Ser. C 49 446 1753 1761
- Kato Y. , Murasugi T. , Hirano H. , and Shibayama T. Fuel economy improvement through tribological analysis of the wet clutches and brakes of an automatic transmission Society of Automotive Engineers of Japan 16 12 57 60 1993
- Shimomukai Kenshu , Kanda Hidesada 2006 Numerical study of normal pressure distribution in entrance flow between parallel plates, I. Finite difference calculations Electronic Transactions on Numerical Analysis 23 202 218
- Yuan Y. , Liu E. A. , Hill J. , and Zou Q. An improved hydrodynamic model for open wet transmission clutches Journal of Fluids Engineering, Transactions of the ASME 129 3 333 337 2007
- Iqbal S. , Bender F.A. , Pluymers B. , and Desmet W. Mathematical Model and Experimental Evaluation of DT in Disengaged Wet Clutches 2013 16
- Kitabayashi H. , Li C. , and Hiraki H. Analysis of various factors affecting DT in multiple-pate wet clutches Proceedings of the JSAE International Spring Fuels and Lubricant Meeting 1 6 Yokohama, Japan May 2003
- Aphale C. R. , Cho J. , Schultz W. W. , Ceccio S. L. , Yoshioka T. , and Hiraki H. Modeling and parametric study of torque in open clutch plates Journal of Tribology 128 2 422 430 2006
- Chang J. A calculation formula for carrying-capacity of annular hydrostatic step-bearing taing account of oil-flow inertia [J] Chinese Journal of Mechanical Engineering 1982 18 1 62 68
- Yuan S. , Peng Z. , and Jing C. Experimental research and mathematical model of DT in single-plate wet clutch Chinese Journal of Mechanical Engineering 24 1 91 97 2011
- Yuan S. , Guo K. , Hu J. , and Peng Z. Study on aeration for disengaged wet clutches using a two-phase flow model ASME Journal of Fluids Engineering 132 11 2010