Abstract
Nowadays, urban conditions have become the main operating conditions for vehicles. Urban traffic congestion leads to a higher rate of vehicle idle speed and frequent shifts. This paper proposes a new shifting strategy in order to effectively improve the problem of frequent shifting, which is called flexible shift. In view of the fact that the electric vehicle cancels the clutch, shifting is completed directly by the control of the motor during the shifting process. Reducing the number of shifts can effectively reduce wear and increase the life of the transmission, which can be realized by the flexible shift. This paper uses MATLAB to simulate the shifting times of this shift strategy under FTP conditions. The simulation results show that electric vehicles with flexible shifting control strategy can significantly reduce the number of shifts, improve comfort, reduce hardware loss, and do not reduce economic efficiency.
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