Abstract
The gearshift schedule of P2 hybrid powertrain can effectively affect the fuel and electricity consumption of the hybrid electric vehicle. An optimal gearshift schedule during the regenerative braking process could significantly increase the energy recovery rate. In this paper, a comprehensive braking force distribution strategy and mechanism of shifting point selection during regenerative braking for P2 hybrid powertrain are proposed. Moreover, the economical gearshift schedule and the off-line gearshift map are also constructed. At last, the braking efficiency of the economical gearshift schedule has been carried out under two braking conditions, and the results show that the economical gearshift schedule can increase SOC value by 23.2%-50.54% under small and medium braking pedal.
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