Simulation and Analysis of the Shift Process for an Automatic Transmission
The automatic transmission (AT) is one of the most
important components of many automobile transmission systems. The
shift quality has a significant influence on the ride comfort of the
vehicle. During the AT shift process, the joint elements such as the
clutch and bands engage or disengage, linking sets of gears to create a
fixed gear ratio. Since these ratios differ between gears in a fixed gear
ratio transmission, the motion of the vehicle could change suddenly
during the shift process if the joint elements are engaged or disengaged
inappropriately, additionally impacting the entire transmission system
and increasing the temperature of connect elements.The objective was
to establish a system model for an AT powertrain using
Matlab/Simulink. This paper further analyses the effect of varying
hydraulic pressure and the associated impact on shift quality during
both engagment and disengagement of the joint elements, proving that
shift quality improvements could be achieved with appropriate
hydraulic pressure control.
[1] Y. Yamamoto, M. Nishida, K. Suzuki, M. Saitou and H. Tsutsui: New
Five-Speed Automatic Transmission for FWD Vehicles, SAE paper
No.2001-01-0871(2001)
[2] H. Scherer: ZF 6-Speed Automatic Transmission for Passenger Cars,
SAE paper No. 2003-01-0596(2003)
[3] J. Greiner, C. Doerr, H. Nauerz and M. Graeve: The New "7G-TRONIC"
of Mercedes-Benz: Innovative Transmission Technology for Better
Driving Performance, Comfort and Fuel Economy, SAE paper No.
2004-01-0649(2004)
[4] M. Kondo, Y. Hasegawa, Y. Takanami, K. Arai, M. Tanaka and M.
Kinoshita: Toyota AA80E 8-Speed Automatic Transmission with Novel
Powertrain Control System, SAE paper No. 2007-01-1311(2007)
[5] M.S. Wan: Close-circle Control System of Automatic Transmission,
Journal of Nanjing Forestry University (Science Volume) (2004)
[6] T. D-Anna, K. Govindswamy and F. Wolter: Aspects of Shift Quality
with Emphasis on Powertrain Integration and Vehicle Sensitivity, SAE
paper No. 2005-01-2303(2005)
[7] T. W. Megli, M. Haghgooie and D. S. Colvin: Shift Characteristics of a
4-Speed Automatic Transmission, SAE paper No. 1999-01-1060(1999)
[8] M. Jiang: Analysis of Shift Process Control of Hydraulic Automatic
Transmission, Journal of Mechanical Design and Research (2005)
[9] J.H. Hong: I-Chin Motor Information-4G9 Fuel Engine, I-CHIN Moter
Technology Co. Ltd(2003)
[10] S.H. Yu, B.L. Zhang: Lancer/Lancer virage Chasis and Body Manual,
China Motor CMWSC 96110900 (1996)
[1] Y. Yamamoto, M. Nishida, K. Suzuki, M. Saitou and H. Tsutsui: New
Five-Speed Automatic Transmission for FWD Vehicles, SAE paper
No.2001-01-0871(2001)
[2] H. Scherer: ZF 6-Speed Automatic Transmission for Passenger Cars,
SAE paper No. 2003-01-0596(2003)
[3] J. Greiner, C. Doerr, H. Nauerz and M. Graeve: The New "7G-TRONIC"
of Mercedes-Benz: Innovative Transmission Technology for Better
Driving Performance, Comfort and Fuel Economy, SAE paper No.
2004-01-0649(2004)
[4] M. Kondo, Y. Hasegawa, Y. Takanami, K. Arai, M. Tanaka and M.
Kinoshita: Toyota AA80E 8-Speed Automatic Transmission with Novel
Powertrain Control System, SAE paper No. 2007-01-1311(2007)
[5] M.S. Wan: Close-circle Control System of Automatic Transmission,
Journal of Nanjing Forestry University (Science Volume) (2004)
[6] T. D-Anna, K. Govindswamy and F. Wolter: Aspects of Shift Quality
with Emphasis on Powertrain Integration and Vehicle Sensitivity, SAE
paper No. 2005-01-2303(2005)
[7] T. W. Megli, M. Haghgooie and D. S. Colvin: Shift Characteristics of a
4-Speed Automatic Transmission, SAE paper No. 1999-01-1060(1999)
[8] M. Jiang: Analysis of Shift Process Control of Hydraulic Automatic
Transmission, Journal of Mechanical Design and Research (2005)
[9] J.H. Hong: I-Chin Motor Information-4G9 Fuel Engine, I-CHIN Moter
Technology Co. Ltd(2003)
[10] S.H. Yu, B.L. Zhang: Lancer/Lancer virage Chasis and Body Manual,
China Motor CMWSC 96110900 (1996)
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:63120", author = "Kei-Lin Kuo", title = "Simulation and Analysis of the Shift Process for an Automatic Transmission", abstract = "The automatic transmission (AT) is one of the most
important components of many automobile transmission systems. The
shift quality has a significant influence on the ride comfort of the
vehicle. During the AT shift process, the joint elements such as the
clutch and bands engage or disengage, linking sets of gears to create a
fixed gear ratio. Since these ratios differ between gears in a fixed gear
ratio transmission, the motion of the vehicle could change suddenly
during the shift process if the joint elements are engaged or disengaged
inappropriately, additionally impacting the entire transmission system
and increasing the temperature of connect elements.The objective was
to establish a system model for an AT powertrain using
Matlab/Simulink. This paper further analyses the effect of varying
hydraulic pressure and the associated impact on shift quality during
both engagment and disengagement of the joint elements, proving that
shift quality improvements could be achieved with appropriate
hydraulic pressure control.", keywords = "Automatic transmission, Simulation and analysis,Shift quality.", volume = "5", number = "4", pages = "851-7", }