Electric vehicle regenerative braking control strategy based on road surface recognition
A technology of regenerative braking and control strategy, applied in electric vehicles, electric braking systems, control devices, etc., can solve problems such as unconsidered effects, and achieve the effect of multi-energy recovery
Pending Publication Date: 2020-07-31
GUILIN UNIV OF ELECTRONIC TECH
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This invention takes into account the influence of the braking intensity z on the distribution coefficient of the front and rear wheel braking force, so that when the vehicle distributes the braking force according to the distribution method proposed in the invention, the vehicle has better braking stability and Safety, but it does not consider the influence of road adhesion conditions on the vehicle braking process
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[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments to better understand the content of the present invention, but the present invention is not limited to the following embodiments.
[0040] In the prior art, an auxiliary driving system is installed on the vehicle to facilitate self-recovery of energy during braking, so as to re-store the recoverable part of the energy consumed during braking into the on-board energy storage element (such as a battery). The assisted driving system includes an information collection subsystem, an information processing subsystem and an execution subsystem. The information acquisition subsystem includes: to detect parameters such as real-time longitudinal velocity, real-time wheel angular velocity, real-time rolling resistance moment, and real-time braking moment, and install corresponding on-board sensors. The information processing subsystem mainly includ...
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The invention discloses an electric vehicle regenerative braking control strategy based on road surface recognition. The electric vehicle regenerative braking control strategy comprises the steps of 1) collecting vehicle operation parameters in real time, and calculating a slip rate and utilization attachment coefficient in real time; 2) judging the state of the vehicle, if the vehicle is in a braking state, implementing regenerative braking control strategy processing, otherwise, executing the step 1), wherein the regenerative braking control strategy processing for the vehicle comprises thesteps of identifying the type of the road surface where the vehicle travels currently, calculating the current expected total braking force and braking strength, obtaining a front and rear wheel braking force optimal distribution rule and a regenerative braking force distribution rule based on the road surface type and the braking strength, obtaining the braking force needed by the front wheel according to the front and rear wheel braking force optimal distribution rule, conducting secondary distribution on the braking force needed by the front wheel according to the regenerative braking forcedistribution rule, and determining the front wheel friction braking force and regenerative braking force. According to the invention, the maximum efficiency of regenerative braking energy recovery can be achieved on the premise that the braking stability and the braking safety are guaranteed.
Description
technical field [0001] The invention relates to regenerative braking control technology, in particular to a regenerative braking control strategy for electric vehicles based on road surface recognition. Background technique [0002] Environmental pollution, global warming, and foreseeable resource depletion have become serious issues affecting the survival of human society today, and are also common challenges faced by the global automobile industry. New energy vehicles have become a hot spot in the development of the automobile industry in the 21st century. As an important representative of new energy vehicles, electric vehicles have the performance of regenerative braking, which is one of the biggest differences between them and traditional fuel vehicles. During the braking process, the kinetic energy of the car is converted into heat energy and lost through friction, and a large amount of energy is wasted. The process of electric vehicles recovering and storing the kine...
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Login to View More IPC IPC(8): B60L7/10B60L7/18
CPCB60L7/10B60L7/18B60L2240/12B60L2240/421B60L2240/461B60L2240/647
Inventor 张向文胡文超党选举莫太平伍锡如任风华李晓赵学军
Owner GUILIN UNIV OF ELECTRONIC TECH