Electric vehicle brake vacuum pump working time prediction system and prediction method thereof

A working time, electric vehicle technology, applied in the direction of braking safety system, etc., can solve the problem of inability to quickly assess the feasibility

Active Publication Date: 2021-07-06
DONGFENG MOTOR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bench test is an important verification method with relatively accurate results in the design and development of parts, but bench resources need support such as sa...

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  • Electric vehicle brake vacuum pump working time prediction system and prediction method thereof
  • Electric vehicle brake vacuum pump working time prediction system and prediction method thereof
  • Electric vehicle brake vacuum pump working time prediction system and prediction method thereof

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Embodiment Construction

[0037] The following specific embodiments are used to further describe the technical solution of the claims of the present invention in detail, so that those skilled in the art can understand the claims more clearly. The protection scope of the present invention is not limited to the following specific examples. The protection scope of the present invention includes the technical solution of the claims of the present invention made by those skilled in the art and is different from the following specific embodiments.

[0038] like figure 1As shown, a system for predicting the working time of a brake vacuum pump of an electric vehicle includes an information acquisition module 100 and a prediction module 200 connected by communication. The total number of starts, the probability distribution of braking deceleration, the initial vacuum degree of the brake vacuum pump, the opening vacuum degree of the brake vacuum pump, and the air extraction characteristic curve of the brake vac...

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Abstract

The invention discloses an electric vehicle brake vacuum pump working time prediction system which comprises an information collection module and a prediction module which are in communication connection. The information collection module is used for collecting the total braking frequency of a whole vehicle, the total starting frequency of the whole vehicle, the braking deceleration probability distribution, the initial vacuum degree of a braking vacuum pump and the starting vacuum degree of the braking vacuum pump in the life cycle of the whole vehicle; the prediction module comprises a braking hydraulic pressure probability distribution module, a braking frequency module, a starting frequency module and a working time module. The invention further provides a prediction method based on the prediction system. Information collected by the information collection module is transmitted to the prediction module, so that the total working time of the brake vacuum pump is predicted. The prediction result is high in accuracy, and the braking design requirement is met; the development period is shortened.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a system and a method for predicting the working time of a brake vacuum pump of an electric vehicle. Background technique [0002] With the rapid development of the new energy vehicle industry, the number of new energy model projects of various main engine manufacturers is gradually increasing. Due to cost constraints, the braking system of most new energy vehicles still adopts the vacuum boosting method, and the brake vacuum pump is used for pure electric vehicles or fuel cell vehicles. Providing vacuum is the only vacuum source for the vehicle braking system, which is of key significance to vehicle safety. [0003] The life of the brake vacuum pump is limited. Generally, the start and stop of the brake vacuum pump is controlled by setting the threshold value of opening and closing, that is, when the vacuum degree of the front chamber of the vacuum booster is lower th...

Claims

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Application Information

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IPC IPC(8): B60T17/22
CPCB60T17/22
Inventor 陈浪陈佳佳陈世荣王平曾书华
Owner DONGFENG MOTOR GRP
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