Brake linear calibration method and system for electric vehicle

An electric vehicle and calibration method technology, applied in the automotive field, can solve problems such as braking non-linearity, and achieve the effects of reducing the cost of vehicle parts, improving driving comfort, and being easy to implement.

Active Publication Date: 2019-05-31
JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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  • Abstract
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Problems solved by technology

[0004] For this reason, an object of the present invention is to propose a braking linear calibration method for electric vehicles to solve the technical problem of non-linear braki...

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  • Brake linear calibration method and system for electric vehicle
  • Brake linear calibration method and system for electric vehicle
  • Brake linear calibration method and system for electric vehicle

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Embodiment Construction

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0057] see figure 1 , the braking linear calibration method for electric vehicles proposed in the first embodiment of the present invention includes steps S101 to S106:

[0058] S101, obtaining vehicle parameters through the vehicle controller, and judging whether the vehicle can enter the coasting feedback state according to the obtained ve...

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Abstract

The invention discloses a brake linear calibration method and system for an electric vehicle. The method comprises: acquiring a vehicle parameter by a vehicle controller and determining whether the vehicle enters a sliding feedback state based on the obtained vehicle parameter; if so, calibrating sliding feedback torque coefficients at different rotating speeds under all energy feedback levels andcalibrating the equivalence between an initial brake feedback value and a maximum sliding feedback value; under all energy feedback levels, calibrating a minimum braking depth opening value at entrance of brake feedback and calibrating a maximum braking depth opening value at exit of brake feedback; calibrating a maximum brake feedback torque opening value under all energy feedback levels; calibrating braking feedback torque proportional coefficients corresponding to all energy feedback levels at different rotating speeds; and calculating brake feedback torque corresponding to all energy feedback levels. Therefore, a technical problem of low linearity of electric vehicle braking is solved on the premise that the energy recovery is met; and thus the driving comfort is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a braking linear calibration method and system for electric automobiles. Background technique [0002] With the rapid development of the automobile industry and the continuous improvement of people's living conditions, automobiles have become one of the indispensable means of transportation for people to travel. Car ownership is increasing year by year, and more and more people own private cars. At present, with the continuous improvement of people's awareness of environmental protection, new energy vehicles, especially electric vehicles, have developed rapidly. [0003] When electric vehicles are braking, there is braking energy recovery, which is superimposed with the mechanical braking of the brake pedal, which will inevitably destroy the original braking effect of the brake pedal, and the linearity of the brake pedal will inevitably be affected. In the process of switch...

Claims

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Application Information

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IPC IPC(8): G01M17/007G01L5/28
Inventor 郝兵熊华林沈祖英俞钟兢单丰武姜筱华常云雪黄聪
Owner JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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