Pure electric vehicle braking force correction method based on braking strength
A pure electric vehicle, braking strength technology, applied in the direction of electric vehicles, control drive, electric braking system, etc., can solve the problems of excessive braking, affecting braking safety and braking feeling, insufficient braking, etc., to achieve The effect of reducing the influence of misoperation and good real-time performance of the algorithm
Active Publication Date: 2021-02-19
JILIN UNIV
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[0015] The purpose of the present invention is to overcome the certain uncertainty between the target braking force determined by the existing braking force distribution method and the actual control effect of the actuator due to the decoupling of the wheel braking force and the pedal opening of the pure electric vehicle braking system, In the actual braking process, insufficient braking or excessive braking often occurs, which affects the braking safety and braking feeling. Therefore, the present invention proposes a braking force correction method for pure electric vehicles based on braking strength. , with the boundary range of the target braking strength determined by the vehicle load as the constraint condition, the deviation is judged by the actual braking strength feedback signal of the vehicle, and then the incremental PID algorithm is used to correct the target braking force in real time
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[0057] The present invention will be further described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention.
[0058] The present invention aims at the decoupling of the wheel braking force and the pedal opening of the pure electric vehicle braking system, so that there is a certain uncertainty between the target braking force determined by the existing braking force distribution method and the actual control effect of the actuator. In the actual braking process, insufficient braking or excessive braking often occurs, which affects the braking safety and braking feeling. The present invention proposes a braking force correction method for pure electric vehicles based on braking strength. The boundary range of the target braking strength determined by the vehicle load is used as a constraint condition, and the deviation is judged through the actual braking strength feedback signal of the vehicle, and th...
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The invention discloses a pure electric vehicle braking force correction method based on braking strength, which comprises the following steps: taking a target braking strength boundary range determined by a vehicle load as a constraint condition, performing deviation judgment through an actual braking strength feedback signal of a vehicle, and performing real-time correction on a target braking force by utilizing an incremental PID algorithm. The problems that due to decoupling of the wheel braking force and the pedal opening degree of a pure electric vehicle braking system, certain uncertainty exists between the target braking force determined through an existing braking force distribution method the actual control effect of an executing element, and the phenomena of insufficient brakingor excessive braking and the like often occur in the actual braking process, and thus the braking safety and the braking feeling are influenced are solved.
Description
technical field [0001] The invention relates to the technical field of braking energy recovery of pure electric vehicles, more precisely, the invention relates to a method for correcting braking force of pure electric vehicles based on braking strength. Background technique [0002] Under the background of the increasing shortage of non-renewable resources in the world, the braking energy recovery technology of pure electric vehicles has been paid more and more attention. Using this technology can effectively improve the driving range of the vehicle and improve the energy saving effect, which is different from the traditional braking system. The most important thing is that the braking force of the braking energy recovery system is jointly provided by the motor and the hydraulic pressure, and the braking force acting on the wheels is decoupled from the pedal opening. Therefore, under a certain pedal opening, the braking force is distributed There is a certain degree of uncer...
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IPC IPC(8): B60L7/18B60L15/20
CPCB60L7/18B60L15/2009B60L2240/16Y02T10/72
Inventor 初亮常城许炎武李世博曹卓
Owner JILIN UNIV