Generation method of regenerative braking policies of double-shaft drive pure electric vehicle

A pure electric vehicle, regenerative braking technology, applied in electric vehicles, electric braking systems, vehicle components, etc., can solve the problem of not fully considering the impact of the regenerative braking force energy recovery of the front and rear axles, etc.
CN106627166AActive Publication Date: 2017-05-10SUN YAT SEN UNIV +1
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2017-05-10

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Abstract

The invention relates to the field of design of electric vehicles, in particular to a generation method of regenerative braking policies of a double-shaft drive pure electric vehicle. Firstly, a proportionality coefficient of a front wheel regenerative braking torque to a total regenerative braking torque corresponding to different wheel upper rotating speeds n and different wheel upper regenerative braking torque demands T is calculated according to MAP maps of front and back motors; the proportionality coefficient enables the utilization efficiency of front and back motor systems to be the highest; then, a braking safety area is calculated according to whole vehicle parameters, ECE braking safety regulations and an ideal braking distribution curve; finally, the regenerative braking policies are generated according to the proportionality coefficient and the braking safety area; and the regenerative braking policies enable the recovery efficiency of regenerative braking energy to be the highest, so that the influence on the energy recovery by the distribution of front and back shaft regenerative braking force is fully considered, and more braking energy is recovered.
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Description

technical field

[0001] The invention relates to the field of electric vehicle design, in particular to a method for generating a regenerative braking strategy of a pure electric vehicle driven by two shafts. Background technique

[0002] Braking energy recovery is an important means to improve the energy utilization efficiency of electric vehicles, and the amount of braking energy recovered is closely related to the braking energy recovery strategy. The braking strategy developed for single-axle drive electric vehicles distributes excessive braking force to the electric drive axle, thereby increasing the recuperation of braking energy, but this tends to reduce braking stability. Compared with single-axis drive electric vehicles, dual-axis drive electric vehicles can output motor braking torque on each electric drive shaft, which can better ensure braking stability, reduce the participation of ABS, and have higher energy recovery potential , therefore, most of the braking en...

Claims

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