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An analysis method for vehicle rollover stability

An analysis method and stability technology, which is applied in the direction of vehicle steering/bump performance, vehicle testing, machine/structural component testing, etc., can solve problems such as unsuitable promotion, tires off the ground, and complexity, and achieve simple, fast, and efficient analysis methods. Stability analysis evaluates accurate and reliable effects

Active Publication Date: 2021-07-16
JIANGLING MOTORS
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  • Claims
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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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  • An analysis method for vehicle rollover stability
  • An analysis method for vehicle rollover stability
  • An analysis method for vehicle rollover stability

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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 a vehicle rollover stability analysis method. Through the vehicle handling limit condition test, the changes of the vertical force Fz of each tire and the height H of the wheel center from the ground with the test time T are recorded. Obtain the critical wheel center ground clearance H0 when the tire vertical force first appears zero value, and the maximum peak value Hmax of the tire wheel center height during the entire test process, then the maximum ground clearance △H of the tire in the working condition test can be calculated . Then according to the size of the ground clearance value of each tire in the test, the rollover stability of the vehicle is comprehensively analyzed and evaluated. The invention uses the tire ground clearance value to directly reflect the rolling posture of the vehicle, so that the analysis and evaluation of the rollover stability is simple and reliable, and can be widely used in the stability evaluation of the vehicle at various development stages 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 Patents(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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