This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental and Numerical Investigations for Analysis of Temperature Rise on the Traction Contact Surface of Toroidal Cvts
Technical Paper
2009-01-1661
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
Language:
English
Abstract
Temperature rise in traction contact areas is one important factor that influences traction coefficient. For examining the influence of temperature rise on the traction coefficient, it is necessary to first clarify temperature rise in the traction contact area. In this article, temperature rise in the traction contact areas is discussed in three major parts. First, measured temperature distributions on the traction contact surface under conditions of high rolling speed and minute amounts of sliding and spinning, such as those which are found in a toroidal CVT, using a twin-disc test machine and thin-film platinum sensors are shown. Second, the above experimental results are compared with results from a traction analysis program (REIB99). Characteristics of calculated results were qualitatively in good agreement with measured results. Although the calculated absolute temperature values were substantially lower than the measured values, it was confirmed that measured temperature rises were two times higher than calculated results under any condition in the experimental range. Thus, we concluded that the traction analysis program is capable of simulating the tendency of temperature rise on a traction contact surface. Finally, temperature distributions on the traction contact surface of full-and half-toroidal CVTs were calculated using REIB99. The influence of variator ratio, input torque, and input rotational speed on temperature rise in a toroidal CVT is discussed.
Recommended Content
| Ground Vehicle Standard | VHDL-AMS Statistical Analysis Packages |
| Technical Paper | Inverse Power Law Model for Operative Life Estimation of Carbon Steel Stub Axle |
| Technical Paper | Design and Manufacture of Spiral Bevel and Hypoid Gears for Heavy-Duty Drive Axles, 1984 |
Authors
Citation
Miyata, S., Höhn, B., Michaelis, K., and Kreil, O., "Experimental and Numerical Investigations for Analysis of Temperature Rise on the Traction Contact Surface of Toroidal Cvts," SAE Technical Paper 2009-01-1661, 2009, https://doi.org/10.4271/2009-01-1661.Also In
References
- Nakano M. Kumura H. Sugihara J. Mori H. Maruyama N. Development of a large torque capacity half-toroidal CVT SAE Technical Paper , 2000-01-0825 2000
- Shinojima T. Toyoda T. Miyata S. Imanisi T. Inoue E. Machida H. Development of the next-generation half-toroidal CVT with geared neutral and power-split systems for 450 Nm engines Proc. of 2004 International CVT and Hybrid Transmission Congress , 2004-34-2878 2004
- Petersen R. Sue A. Torque vectoring in center differential by means of toroidal-CVT VDI Berichte (in Germany) 1943 2006 929 944
- Elsy D. IVT technology - building on the fuel economy gains delivered by hybrids Global powertrain congress 2004
- Tanaka H. Toroidal CVT (in Japanese) 2000 Corona publishing Co., Ltd.
- Hata H. Tsubouchi T. Shirasawa H. New Traction fluids for automotive use Proc. of Int. Congr. on CVT , CVT96, JSAE Tech. Paper 9636484 1996 147 150
- Yamamoto K. A study of power roller bearings in a toroidal CVT J. of Japanese Soc. of Tribologists (in Japanese), 47, 7 2002 582 589
- Ishikawa K. Tanaka H. Power transmission of half-toroidal traction-drive CVT - 7th report Temperature-rise of power-roller-, Proc. of the 73rd JSME Fall Annual Meeting (in Japanese) 1995 264 265
- James I. Lee A. Evans S. Increasing power density in a full toroidal variator 3rd International IIR Symposium , Innovative Automotive Transmissions 2004
- Graswald C. Reibung im elastohydrodynamischen Kontakt von Reibradgetriebe Diss. TU München (in Germany) 2001
- Winer W.O. A review of temperature measurements in EHD contacts Proc. of the 5th Leeds-Lyon Symposium 1978 125 130
- Yagi K. Kyogoku K. Nakahara T. Experimental investigation of effects of slip ratio on elastohydrodynamic lubrication film related to temperature distribution in oil films Proc. I. Mech. E. , Part J, 220 2006 353 363
- Miyata S. Höhn B.-R. Michaelis K. Kreil O. Experimental investigation of temperature rise in elliptical EHL contacts Tribology International , 41 11 2008 1074 1082
- The Japan Society of Mechanical Engineers ed., JSME Mechanical Engineer's Handbook, Design, Enginnering Materials, Data and guide for mechanical engineers 2006 The Japan Society of Mechanical Engineers
- Crook A.W. The lubrication of rollers Pt. III-A theoretical diskusssion of friction and the tempratues in the oil film Phil. Trans ., Series A, 254 1961 237 258
- Winter H. Hohn B.-R. Michaelis K Kagerer E. Measurement of pressure, temperature and film thickness in disk and gear contacts Proc. of JSME International conference on motion and powertransmissions 1991 1038 1042
- Clarke A. Sharif K.J. Evans H.P. Snidle R.W. Elastohydrodynamic modeling of heat partition in rolling-sliding point contacts Proc. I. Mech. E. , Part J, 221 2007 223 235
- Yamamoto Y. Kaneta M. Tribogoly (in Japanese) 1998 49 Rikougakusha Ltd.
- Kumura H. Recent trends of automatic transmissions and continuously variable transmissions JAST tribology forum ’99 (in Japanese) 1999 1 17
- Mitamura N. Hidaka H. Takaki S. Microstructural development in bearing steel during rolling contact fatigue Material Science Forum , 539-543 2007 4255 4260