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Optimization method facing lateral force of Macpherson suspension shock absorber

An optimization method and shock absorber technology, which is applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of high cost and time-consuming, and achieve the effect of simple operation, reliable results and improved work performance

Active Publication Date: 2013-09-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above two solutions to the lateral force problem of the McPherson suspension shock absorber require a large number of sample trial production and test verification, which is costly and time-consuming

Method used

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  • Optimization method facing lateral force of Macpherson suspension shock absorber
  • Optimization method facing lateral force of Macpherson suspension shock absorber
  • Optimization method facing lateral force of Macpherson suspension shock absorber

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Embodiment

[0021] An optimization method for the lateral force of the McPherson suspension shock absorber, its specific implementation process includes the following steps:

[0022] A: Establish a three-dimensional coordinate system representing the left, right, front and rear, and height of the vehicle, and obtain the hard point coordinates of the McPherson suspension in this coordinate system through measurement and calculation, such as figure 1 shown. The hard point indicates the connection position of each component, including control arm front point 1, control arm rear point 2, control arm outer point 3, stabilizer bar and control arm connection point 4, and stabilizer bar rubber bushing installation point 5 , tie rod outer point 6, steering tie rod inner point 7, wheel mid point 8, wheel ground point 9, shock absorber lower point 10, spring lower center point 11, spring upper center point 12, shock absorber upper point 13 ;

[0023] B: In the multi-body dynamics analysis software...

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Abstract

The invention relates to an optimization method facing a lateral force of a Macpherson suspension shock absorber, which comprises the following steps: firstly, measuring hard point coordinates of a Macpherson suspension to be optimized and establishing a multi-rigid-body simulation model on the basis of the multi-body dynamics theory; then using the K&C characteristic of the actually measured Macpherson suspension as the datum and regulating hard point coordinates of the simulation model until an error of a simulation result is controlled in an acceptable range; and finally, respectively using a geometrical parameter of a spring seat and an actual acting force line of a coil spring as optimization design variables, using the lateral force at the positions of a guide seat and a piston of the shock absorber as an optimization target and selecting a response surface method to carry out optimization in multi-body dynamics software, so that the optimal geometrical parameter of the spring seat and the optimal spring actual acting force line which enable the lateral force of the shock absorber to be minimized can be obtained. Compared with the prior art, the optimization method respectively starts with the geometrical parameter of the spring seat of the shock absorber and the force line of the coil spring of the shock absorber, optimizes the lateral force at the positions of the guide seat and the piston of the shock absorber, improves the working performance of the suspension and prolongs the service life of the shock absorber.

Description

technical field [0001] The invention relates to an automobile suspension optimization method, in particular to an optimization method for the lateral force of a McPherson suspension shock absorber. Background technique [0002] McPherson suspension has the advantages of simple structure, compact layout, small change in front wheel alignment, and good driving stability. It is the most commonly used suspension form for compact models and some medium-sized cars at present. However, since the force direction of the installation point on the shock absorber does not coincide with the axis of the shock absorber, the shock absorber inevitably has side force in actual work. The performance of McPherson suspension depends largely on the lateral force at the guide seat of the shock absorber and the piston and the friction force caused by it. Excessive lateral force on the guide seat of the shock absorber will cause oil leakage of the shock absorber and early wear of the piston rod. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张立军孟德建王世忠余卓平
Owner TONGJI UNIV
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