Regenerative braking force distribution method for pure electric vehicle
A technology of regenerative braking force and pure electric vehicles, which is applied in the direction of electric vehicles, electric braking systems, brakes, etc., and can solve the problems that the braking force distribution method cannot simultaneously ensure braking energy recovery and maximize braking safety.
Active Publication Date: 2021-02-02
JILIN UNIV
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Problems solved by technology
[0014] The purpose of the present invention is to overcome the problem that the existing braking force distribution method cannot ensure the maximum recovery of braking energy and the best braking safety due to limitations of various factors such as hardware and software. Decoupling pure electric vehicles with front motor and front axle, comprehensively considering the ideal braking force distribution curve, ECE regulations off-line and rear axle braking force limit and other limiting factors, in order to stimulate motor regeneration as much as possible under the premise of ensuring braking safety Braking potential, so as to balance the contradictory requirements of maximizing braking energy recovery and optimal braking safety, and propose a regenerative braking force distribution method for pure electric vehicles
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[0151] Specific embodiments of the present invention are described below in conjunction with accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, some parameters that come from other software modules of the braking system and have little relevance to the main content of the present invention will be directly applied here and will not be discussed in detail.
[0152] The present invention is aimed at the decoupled pure electric vehicle with a drive motor in front of the front axle in the laboratory, and comprehensively considers the ideal braking force distribution curve, ECE regulations off-line and rear axle braking force limit and other limiting factors to determine the front axle braking force Boundary conditions; at the same time, in order to balance the contradictory requirements of maximum braking energy recovery and optimal braking safety, the fuzzy control method is use...
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The invention discloses a regenerative braking force distribution method for a pure electric vehicle, and the method comprises the steps: enabling a target vehicle model to be a drive motor-driven front axle decoupling pure electric vehicle, comprehensively considering an ideal braking force distribution curve, ECE regulation offline and a rear axle braking force limit value, and determining a front axle braking force boundary condition; meanwhile, in order to balance the contradiction requirement of braking energy recovery maximization and optimal braking safety, determining the optimal frontaxle braking force through a fuzzy control method, on the premise that the braking safety is guaranteed, exciting the regenerative braking potential of a motor as much as possible, and then coordinating the front axle electro-hydraulic braking force; and finally, based on the principle of rear shaft priority compensation, reasonably distributing the braking force to meet the total braking requirement.
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 regenerative braking force distribution method of pure electric vehicles. Background technique [0002] Under the background of the increasing shortage of non-renewable resources in the world, the braking energy recovery technology of electric vehicles has been paid more and more attention. Using this technology can effectively improve the driving range of vehicles and improve the energy saving effect. Braking force distribution is an important part of it. The components directly affect the quality of the braking energy recovery technology. It is necessary to propose a braking force distribution method. Under the premise of satisfying the contradiction between the maximum braking energy recovery and the best braking safety, the Reasonable distribution of motor and hydraulic braking force. Therefore, a regenerati...
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Login to View More IPC IPC(8): B60L7/18B60T8/172
CPCB60L7/18B60T8/172B60T2270/608
Inventor 初亮常城
Owner JILIN UNIV