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Automobile rollover stability analysis method

An analysis method and stability technology, applied in vehicle steering/bump performance, vehicle testing, measuring devices, etc., can solve problems that are not suitable for promotion, tires off the ground, complexity, etc., and achieve simple and fast analysis methods, stability analysis and evaluation Accurate and reliable results

Active Publication Date: 2020-04-07
JIANGLING MOTORS
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  • Application Information

AI Technical Summary

Problems solved by technology

The establishment of the stability function in this method largely depends on the experience and judgment of the tester, and it is too complicated to be popularized.
When the vehicle is tested under extreme handling conditions, one tire or multiple tires on the same side will often appear to be off the ground with the tendency of rollover. Not applicable

Method used

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  • Automobile rollover stability analysis method
  • Automobile rollover stability analysis method
  • Automobile rollover stability analysis method

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Embodiment Construction

[0020] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] The rollover stability analysis method of the present invention is suitable for most small and medium-sized vehicles with rigid body or frame structure, especially for common four-wheeled vehicles, such as the target vehicle in this embodiment. In this embodiment, in order to evaluate the stability of the automobile chassis in the early stage of product development, it is necessary to conduct rollover stability analysis in the virtual prototype environment. The tire vertical force and wheel center height data of the vehicle can be obtained through the dynamics CAE software. In the real vehicle test, the data can be obtained through the force sensor and laser sensor installed on the wheel.

[0022] Such as figure 1 Shown is the flow chart of the rollover stability analysis method of the present invention, comprising the steps:

[0023...

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Abstract

The invention discloses an automobile rollover stability analysis method. By testing the operating limit working condition of the vehicle, the change of the vertical force Fz of each tire and the height H of the wheel center from the ground along with the test time T is recorded. The maximum ground clearance delta H of the tire in a working condition test can be calculated by acquiring the wheel center critical ground clearance H0 when the vertical force of the tire has a zero value for the first time and the maximum peak value Hmax of the wheel center height of the tire in the whole test process. And then the rollover stability of the automobile is comprehensively analyzed and evaluated according to the ground clearance value of each tire of the automobile in the test. According to the invention, the tire ground clearance value is utilized to directly reflect the roll attitude of the vehicle, so that the roll stability analysis and evaluation are simple and reliable, and the method can be widely applied to the stability evaluation of the vehicle in each development stage of automobile products.

Description

technical field [0001] The invention belongs to the technical field of automobile chassis, and in particular relates to an analysis method for automobile rollover stability. Background technique [0002] The consequences of vehicle rollover accidents are often extremely serious, and many factors may cause vehicle rollover in actual driving, such as high-speed cornering, high load center of mass, and sudden steering wheel steering. Therefore, the anti-rollover stability of automobiles under various extreme working conditions is one of the most important links in chassis design. In the early stage of product development, CAE (Computer Aided Engineering) is usually used to evaluate and analyze the rollover stability, such as comparing the influence of various suspension schemes, the center of mass of the vehicle, etc. on the rollover stability, and the control stability of the benchmark car In the late stage of product development, after the prototype vehicle is manufactured...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01M17/06
CPCG01M17/007G01M17/06
Inventor 魏益国刘洲段龙杨黄晖余显忠杨新星
Owner JIANGLING MOTORS
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