The 3DHT dynamic mathematical model is analyzed in this paper. The transmission structure is P1/P3 structure, and the engine is rigidly connected with P1 motor. There is a clutch between the engine and the transmission, which acts as a series parallel switch. When driving in EV mode, the vehicle is mainly driven through P3, the engine power is not output, and the clutch is opened. When driving in series mode, the vehicle is also driven through P3, but the engine power is used to drive P1 power generation, and the clutch is also open. When driving in parallel mode, the P3 and the engine drive the vehicle at the same time, the transmission needs to be hung in the corresponding gear, and the clutch needs to be closed. When switching from EV mode or series mode to parallel mode, it is necessary to implement the shift action problem, which will undoubtedly affect the acceleration performance of the vehicle. In pure electric driving, if the pre-shift strategy is adopted, the gear will increase with the increase of the speed. When the EV is switched to parallel driving, the parallel mode can be realized only by clutch engagement. Engine torque can be quickly transmitted to the wheels. The verification platform of vehicle software closed-loop system is constructed, and the pre-shift strategy is verified by simulation. The test data prove that the proposed pre-shift strategy in EV mode can significantly improve the dynamic performance of the vehicle.
Study on Pre-shift Strategy of 3DHT Automatic Transmission
Lect. Notes Electrical Eng.
International Conference on Guidance, Navigation and Control ; 2024 ; Changsha, China August 09, 2024 - August 11, 2024
2025-02-28
11 pages
Article/Chapter (Book)
Electronic Resource
English
Research on Intelligent Shift Strategy of Automatic Transmission
Trans Tech Publications | 2014
|Adaptive shift scheduling strategy introducing neural network in automatic transmission
Automotive engineering | 1995
|Automatic Transmission Shift Strategy Based on Greedy Algorithm Using Predicted Velocity
Springer Verlag | 2020
|Slope Shift Strategy for Automatic Transmission Vehicles Based on the Road Gradient
Online Contents | 2018
|Slope Shift Strategy for Automatic Transmission Vehicles Based on the Road Gradient
Springer Verlag | 2018
|