Braking recycling strategy for new energy vehicle

Abstract

The invention discloses a braking recycling strategy for a new energy vehicle. The new energy vehicle comprises an electric motor and a gearbox; an output shaft of the electric motor is connected withthe input end of the gearbox; the output end of the gearbox is connected with a new energy vehicle rear axle; the new energy vehicle brake comprises an electric brake and a mechanical brake; the upper part of a vehicle braking pedal corresponds to the electric brake; the lower part of the vehicle braking pedal corresponds to the mechanical brake; the braking of the electric brake is recycled by using the electric motor; the gear of the gearbox is adjusted according to an operating characteristic curve of the electric motor so as to guarantee that the electric motor operates along a maximum torque characteristic curve at the current vehicle speed to realize maximization of braking recycling energy.

Description

technical field [0001] The invention relates to a control strategy for a new energy vehicle, in particular to a control strategy for braking recovery when the new energy vehicle brakes. Background technique [0002] New energy vehicles include hybrid vehicles, pure electric vehicles, etc. Hybrid vehicles are mostly gasoline-electric hybrid vehicles. For new energy vehicles, in order to improve their capacity utilization, some will use motor braking during braking or coasting. However, in the new energy vehicle equipped with a gearbox, if the motor blindly provides the same braking force to generate electricity during the braking recovery process, the recovery efficiency of the motor will be low and the capacity will be wasted. Therefore, in order to further improve the braking It is necessary to further improve the control strategy of brake recovery of new energy vehicles in order to improve the efficiency of energy recovery and energy use efficiency. Contents of the inven...

AI Technical Summary

Problems solved by technology

[0002] New energy vehicles include hybrid vehicles, pure electric vehicles, etc. Hybrid vehicles are mostly gasoline-electric hybrid vehicles. For new energy vehicles, in order to improve their capacity utilization, some will use motor braking during braking or coasting. However, in the new energy vehicle equipped with a gearbox, if the motor blindly provides the same braking force to generate electricity during the braking recovery process, the recovery efficiency of the motor will be low and the capacity will be wasted. Therefore, in order to further improve the braking It is necessary to further improve the control strategy of brake recovery of new energy vehicles for the efficiency of energy recovery and energy use efficiency

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