TY - GEN
T1 - Engine coordinated control for automatic transmission downshift process
AU - Li, Gang
AU - Huang, Ying
AU - Ge, Yanwu
AU - Wan, Guoqiang
PY - 2013
Y1 - 2013
N2 - In order to improve the shift quality and extend the durability of the clutch, the engine coordinated control for gear downshifts is studied in this paper. A dynamic model of 2-1 shifting process is built using the Lagrange method. Subsequently, by analyzing stages of the shifting process, the quantitative relationship between the input torque and the clutch friction torque of ideal gear shifting has been obtained, and the ideal control trajectories of clutch pressure are proposed. The output torque observer is designed, moreover, the coordinated powertrain control strategy for gear shifting has been provided. The experimental results show that through coordinated engine torque control, the shift jerk and the friction work during downshift inertia phase can be reduced significantly; what's more, the shift quality of power-on downshifting can be improved by the closed-loop control of turbine speed.
AB - In order to improve the shift quality and extend the durability of the clutch, the engine coordinated control for gear downshifts is studied in this paper. A dynamic model of 2-1 shifting process is built using the Lagrange method. Subsequently, by analyzing stages of the shifting process, the quantitative relationship between the input torque and the clutch friction torque of ideal gear shifting has been obtained, and the ideal control trajectories of clutch pressure are proposed. The output torque observer is designed, moreover, the coordinated powertrain control strategy for gear shifting has been provided. The experimental results show that through coordinated engine torque control, the shift jerk and the friction work during downshift inertia phase can be reduced significantly; what's more, the shift quality of power-on downshifting can be improved by the closed-loop control of turbine speed.
KW - Clutch-to-clutch automatic transmission
KW - Coordinated control
KW - Power-on downshift
KW - Turbocharged diesel engine
UR - https://www.scopus.com/pages/publications/84889026248
U2 - 10.1109/ICVES.2013.6619618
DO - 10.1109/ICVES.2013.6619618
M3 - Conference contribution
AN - SCOPUS:84889026248
SN - 9781479903801
T3 - Proceedings of 2013 IEEE International Conference on Vehicular Electronics and Safety, ICVES 2013
SP - 137
EP - 141
BT - Proceedings of 2013 IEEE International Conference on Vehicular Electronics and Safety, ICVES 2013
PB - IEEE Computer Society
T2 - 2013 IEEE International Conference on Vehicular Electronics and Safety, ICVES 2013
Y2 - 28 July 2013 through 30 July 2013
ER -