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Simulation and Studies on a Double Transition Shift Transmission
Technical Paper
2010-01-1978
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
DTS (Double Transition Shift) transmission can achieve multiple-speed automatic transmission by using minimum number of planetary gear sets and clutches. Historically DTS transmission has been overlooked because of the complexity to perform high quality shifts.
In this paper, a vehicle model with a traditional AT (Automatic Transmission) is studied first using Matlab/SimDriveline; the simulation results and the vehicle road test data show good agreement. Then a DTS transmission is established based on the same vehicle model. An open-loop control module is developed. All possible parameters which can influence the shift performance are studied. The parametric study shows a double transition shift consists of two inter-action shifts, the parameters which can influence the shift quality include the overlap time of these two inter-action shifts, shifts ending time, downshift parameters and upshift parameters; downshift parameters include initial step of an oncoming brake, pressure slope of an oncoming brake, initial step of an offgoing brake, and pressure slope of an offgoing brake; upshift parameters include initial step of an oncoming clutch, and pressure slope of an oncoming clutch. And finally, the comparison of the vehicle performance with the same vehicle data but different transmissions, one is DTS and the other is traditional AT, is presented. The simulation results indicate that DTS vehicle has a smaller shift shock at lower throttle opening positions, minor shift quality decline and better fuel economy performance at higher throttle opening positions.
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Chang, Y. and Wu, D., "Simulation and Studies on a Double Transition Shift Transmission," SAE Technical Paper 2010-01-1978, 2010, https://doi.org/10.4271/2010-01-1978.Also In
References
- Hojo, Y. Iwatsuki, K. Oba, H. Ishikawa, K. “Toyota Five-Speed Automatic Transmission with Application of Modern Control Theory,” SAE Technical Paper 920610 1992 10.4271/920610
- Hattori, N. Oshidari, T. Takatori, K. Iwanaga, K. et al. “A New Five-Speed Nissan Automatic Transmission for Passenger Cars,” SAE Technical Paper 900551 1990 10.4271/900551
- Kondo, M. Hasegawa, Y. Takanami, Y. Arai, K. et al. “Toyota AA80E 8-Speed Automatic Transmission with Novel Powertrain Control System,” SAE Technical Paper 2007-01-1311 2007 10.4271/2007-01-1311
- Dourra, H. Kwapis, D. “Development of Output Torque Equation for Double Swap Shift Control,” SAE Technical Paper 2007-01-1308 2007 10.4271/2007-01-1308
- Dourra, H. Mourtada, A. “Adaptive nth Order Lookup Table used in Transmission Double Swap Shift Control,” SAE Technical Paper 2008-01-0538 2008 10.4271/2008-01-0538
- Marano, J.E. Moorman, S.P. Whitton, M.D. Williams, R.L. “Clutch-to-Clutch Transmission Control Strategy,” SAE Technical Paper 2007-01-1313 2007 10.4271/2007-01-1313
- Raghavan, S. Hebbale, K. “Four Speed Power Transmission,” United States Patent No. 5,836,850 November 1998
- Zhang, Y. Chang, Y. “Automatic Transmission Double-Transition Shift Control,” Research Report for General Motors R &D and Planning Feb. 2008
- Wu, D. Zhang, Y. Chang, Y. “Dynamic analysis and Simulation of Drivablility and Control of a Double Transition Shifting System,” 5th International IEEE Vehicle Power and Propulsion Conference, paper number 978-1-4244-2601-0 Sep. 2009 Dearborn, Michigan
- The MathWorks, Inc SimDriveline 1 User's Guide March 2007