Braking recycling strategy for new energy vehicle

A new energy vehicle, brake recovery technology, applied in the direction of electric vehicles, electric braking systems, vehicle components, etc., can solve the problems of waste of capacity, low efficiency of motor recovery, etc., and achieve the effect of improving energy recovery by braking

Inactive Publication Date: 2018-09-07
TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
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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

Method used

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  • Braking recycling strategy for new energy vehicle
  • Braking recycling strategy for new energy vehicle
  • Braking recycling strategy for new energy vehicle

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Embodiment Construction

[0016] The concrete implementation method of the present invention is as follows:

[0017] New energy vehicles include pure electric vehicles, hybrid vehicles, etc. Both pure electric vehicles and hybrid vehicles include electric motors. In order to meet the needs of vehicle power and various complex working conditions, existing pure electric vehicles and hybrid vehicles, It is often equipped with a gearbox to improve power and economy. For pure electric vehicles and hybrid vehicles, the electric motor is usually used to recharge when braking. However, most new energy vehicles use the gearbox when braking. The gear position remains unchanged, and the power generation torque of the electric motor is not the maximum, which leads to the incomplete recovery of kinetic energy and the waste of part of the kinetic energy. Therefore, in order to further improve the efficiency of the kinetic energy recovered by braking, the present invention proposes a new energy vehicle system The mea...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/26B60L7/18
CPCB60L7/26B60L7/18
Inventor 张辉
Owner TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
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