This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Shudder and Frictional Characteristics Evaluation of Dual Clutch Transmission Fluids
Technical Paper
2014-01-1988
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Under the initiative of The United States Council for Automotive Research LLC (USCAR) [1], we have developed and run comprehensive friction tests of dual clutch transmission fluids (DCTFs). The focus of this study is to quantify the anti-shudder durability over a simulated oil life of 75,000 shifts. We have evaluated six DCT fluids, including 2 fluids with known field shudder performance.
Six different tests were conducted using a DC motor-driven friction test machine (GK test bench): 1. Force Controlled Continuous Slip, 2. Dynamic Friction, 3. Speed controlled Acceleration-Deceleration, 4. Motor-torque controlled Acceleration-Deceleration, 5. Static Friction, and 6. Static Break-Away. The test fluids were aged (with the clutch system) on the test bench to create a realistic aging of the entire friction system simultaneously.
The Force Controlled Continuous Slip mode has demonstrated a correlation with anti-shudder performance in the field, whereas other tests revealed important properties such as torque capacity and shift qualities. The study has provided an important data in order to establish anti-shudder test methods and specifications for DCT fluids.
This project was undertaken and financially supported by the Transmission Working Group of USCAR.
Recommended Content
Authors
- Hiroko Ohtani - Ford Motor Co.
- Khaled Zreik - General Motors Co.
- Edgar Steigerwald - Deutsche Pentosin-Werke GmbH
- Martin Knaffel - Deutsche Pentosin-Werke GmbH
- Robert Neumann - Deutsche Pentosin-Werke GmbH
- Gordon P. Small - Deutsche Pentosin-Werke GmbH
- Gregory Mordukhovich - AVL Powertrain Engineering Inc.
- Tracey E. King - J Haltermann Ltd.
Citation
Ohtani, H., Zreik, K., Steigerwald, E., Knaffel, M. et al., "Shudder and Frictional Characteristics Evaluation of Dual Clutch Transmission Fluids," SAE Technical Paper 2014-01-1988, 2014, https://doi.org/10.4271/2014-01-1988.Also In
References
- USCAR The United States Council For Automotive Research, LLC. 1000 Town Center Building, Suite 300, Southfield, Michigan 48075 www.uscar.org
- Matthes , B. Dual Clutch Transmissions - Lessons Learned and Future Potential SAE Technical Paper 2005-01-1021 2005 10.4271/2005-01-1021
- Razzacki , S. Design Methodology for a Compact Dual Clutch Transmission (DCT) SAE Technical Paper 2009-01-0511 2009 10.4271/2009-01-0511
- Tersigni , S. , Henly , T. , Iyer , R. , Cleveland , C. et al. New Durability Testing of Dual Clutch Transmission Fluids SAE Technical Paper 2008-01-2397 2008 10.4271/2008-01-2397
- Tersigni , S. , Tang , H. , Iyer , R. , Cleveland , C. et al. Durability of Dual Clutch Transmission Fluids SAE Technical Paper 2009-01-1801 2009 10.4271/2009-01-1801
- Hurley , S. , Tipton , C. , and Cook , S. Lubricant Technology for Dual Clutch Transmissions SAE Technical Paper 2006-01-3245 2006 10.4271/2006-01-3245
- Mang , T. , Dresel , W. Lubricants and Lubrication 2 nd Wiley-VCH 2007
- Mang , T. , Bobzin , K. , Bartels , T. Industrial Tribology: Tribosystems, Friction, Wear and Surface Engineering, Lubrication Wiley-VCH 2011
- The Coordinating European Council for the Development of Performance Tests for Fuels Lubricants and other fluids http://cectests.org/
- Cameron , T. , McCombs , T. , Devlin , M. , Tersigni , S. et al. ATF Friction Properties and Shift Quality SAE Technical Paper 2004-01-3027 2004 10.4271/2004-01-3027
- Cameron , T. , Tersigni , S. , McCombs , T. , and Jao , T. ATF Effects on Friction Stability in Slip-Controlled Torque Converter Clutches SAE Technical Paper 2003-01-3255 2003 10.4271/2003-01-3255
- Cameron , T. , Iyer , R. , McCombs , T. , Maelger , H. et al. Enhanced Stability of Transmission Clutch Engagement with Temperature-Dependent ATF Friction SAE Technical Paper 2007-01-3977 2007 10.4271/2007-01-3977