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A Dual Clutch Torque Converter for Dual Input Shaft Transmissions
Technical Paper
2013-01-0232
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents an alternative launch device for layshaft dual clutch transmissions (DCT's). The launch device incorporates a hydrodynamic torque converter, a lockup clutch with controlled slip capability and two wet multi-plate clutches to engage the input shafts of the transmission. The device is intended to overcome the deficiencies associated with using conventional dry or wet launch clutches in DCT's, such as limited torque capacity at vehicle launch, clutch thermal capacity and cooling, launch shudder, lubricant quality and requirement for interval oil changes. The alternative device enhances drive quality and performance at vehicle launch and adds the capability of controlled capacity slip to attenuate gear rattle without early downshifting. Parasitic torque loss will increase but is shown not to drastically influence fuel consumption compared to a dry clutch system, however synchronizer engagement can become a concern at cold operating temperatures. The performance of the dual clutch torque converter is assessed in a 7 speed front wheel drive DCT application and compared against the dry clutch system in the areas of launch, start/stop, driveline torsional isolation, gear rattle mitigation and fuel consumption. The dual clutch torque converter is shown to overcome the shortcomings of a dry friction launch system and deliver equivalent fuel economy performance.
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Citation
Robinette, D. and Skrzycke, T., "A Dual Clutch Torque Converter for Dual Input Shaft Transmissions," SAE Technical Paper 2013-01-0232, 2013, https://doi.org/10.4271/2013-01-0232.Also In
References
- Kluger , M. and Greenbaum , J. Automatic Transmission Efficiency Characteristics and Gearbox Torque Loss Data Regression Techniques SAE Technical Paper, 930907 1993 10.4271/930907
- Matthes , B. Dual Clutch Transmissions - Lessons Learned and Future Potential SAE Technical Paper, 2005-01-1021 2005 10.4271/2005-01-1021
- Schweitzer , J. and Gandham , J. Computational Fluid Dynamics in Torque Converters: Validation and Application Int. Journal of Rotating Machinery 9 411 418 2003 10.1080/10236210390241646
- SAE International Surface Vehicle Recommended Practice Hydrodynamic Drive Test Code Apr 1994
- Abe , H. , Tsuruoka , M. , Muto , A. , Kato , M. et al. Development of Super Ultra Flat Torque Converter with Multi Plate Lock-up Clutch SAE Int. J. Engines 2 1 48 55 2009 10.4271/2009-01-0141
- Kietlinski T and Fingerman , M. 8mm Elliptical Torque Converter from Diamler Chrysler Corporation SAE Technical Report 2007-01-0241 2007 10.4271/2007-01-0241
- Ochi , T. , Takeucki , H. , Kimura , H. and Watanabe , K. Development of a Super-Flat Torque Converter for the New Toyota FWD 6-Speed Automatic Transaxle SAE Technical Paper 2006-01-0149 2006 10.4271/2006- 10-0149
- Xia , H. and Oh , P. A Dynamic Model for Automotive Torque Converters Int. J. of Vehicle Design 21 344 354 1999
- Stevenson , P. D. Dual Clutch Transmission with a Torque Converter U.S. Patent 7, 263, 907 Sept 4 2007
- Le Guen , D. , Weck , T. , Balihe , A. , and Verbeke , B. Definition of Gearshift Pattern: Innovative Optimization Procedures Using System Simulation SAE Int. J. Engines 4 1 412 431 2011 10.4271/2011-01-0395
- Cardone , G. Astarita , T. and Carlomagno G. M. Heat Transfer Measurements on a Rotating Disk Int. J. of Rotating Machinery 3 1 1 9 1997 10.1155/S1023621X97000018
- Przybilla , M. , Kunze , C. , Celik , S. , and Dongaonkar , S. Combined Simulation Approach For Dry Clutch Systems SAE Technical Paper 2011-01-1232 2011 10.4271/2011-01-1232
- Robinette , D. , Grimmer , M. , Horgan , J. , Kennell , J. et al. Torque Converter Clutch Optimization: Improving Fuel Economy and Reducing Noise and Vibration SAE Int. J. Engines 4 1 94 105 2011 10.4271/2011-01-0146