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Design method for optimum speed characteristics of trunk cab damper

A design method and technology of optimal speed, applied in the superstructure, vehicle components, superstructure and other directions of trucks, can solve the problem of not meeting the design requirements of the comfort of the vehicle cab, etc.

Inactive Publication Date: 2013-05-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the automobile industry, the current design method of the speed characteristics of the cab shock absorber cannot meet the design requirements of vehicle development and cab comfort

Method used

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  • Design method for optimum speed characteristics of trunk cab damper
  • Design method for optimum speed characteristics of trunk cab damper
  • Design method for optimum speed characteristics of trunk cab damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one : One-side suspension mass of a truck full floating cab , the one-sided mount corresponds to the cab mount elastic coefficient ; The weight of the cab is carried by the single point of the front suspension , the single mounting point of the front suspension corresponds to the elastic coefficient of the cab suspension ;Corresponding body mass of a single wheel , that is, the sprung mass, the suspension spring stiffness , suspension damping ; Unsprung tire mass , tire stiffness ; Class C pavement reference spatial frequency The pavement power spectral density value under , the vehicle speed ;shock absorber installation leverage ratio , mounting angle ; Initial valve opening speed of shock absorber recovery stroke , the maximum valve opening speed ;Initial valve opening speed in compression stroke , the maximum valve opening speed ; Safety ratio of shock absorber , two-way ratio .

[0055] The design method of the optim...

Embodiment 2

[0097] Embodiment two : A truck full floating cab rear suspension single point (single shock absorber) bears the weight of the cab , the single rear suspension point corresponds to the cab suspension elastic coefficient ; Other vehicle parameters and shock absorber parameters are the same as in Example 1.

[0098] Adopt the design steps of embodiment one, namely:

[0099] (1) Determine the optimal damping ratio of the cab suspension system :

[0100] According to the quality of the one-side suspension of the cab , one-sided suspension stiffness , the sprung mass corresponding to a single wheel , suspension stiffness , suspension damping N.s / m, unsprung tire mass , tire stiffness ; Class C pavement reference spatial frequency ;reference spatial frequency The pavement power spectral density value under , and the vehicle speed , to determine the optimal damping ratio of the cab suspension system ,which is:

[0101] =0.2701;

[0102] In the formul...

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Abstract

The invention relates to a design method for optimum speed characteristics of a trunk cab damper, and belongs to the technical field of cab suspension. Because analysis and calculation of a cab three quality vibration system are very complex, none reliable design method for design of the optimum speed characteristics of the trunk cab damper exists all the time at the moment. According to the method, the three quality vibration system and an optimum damping ratio determined by the three quality vibration system are composed of wheels, a trunk body and a cab, utilizes safety ratios, bi-directional characteristics, lever ratios and installment angles of the damper to design the optimum speed characteristics of the cab damper, and obtain recovery-travel and compression-travel segmented characteristic curves required by the design. By adopting the design method, the reliable speed characteristics of the cab damper are achieved. The design of the damper can ensure that the optimum damping effects of the damper are reached, and riding comfort is satisfied. Meanwhile, repeating tests, verification and modify are avoided, and test cost of the cab damper is reduced.

Description

technical field [0001] The invention relates to a cab shock absorber, especially a design method for optimal speed characteristics of a truck cab shock absorber. Background technique [0002] The damping characteristics of the cab shock absorber have an important influence on the vibration reduction effect of the cab and the comfort of the driver. However, since the full-floating cab suspension system is a three-mass vibration system composed of wheels, body mass and cab, its analysis and calculation are very complicated, and many vehicle engineering experts at home and abroad have to use a simplified single-mass vibration system model Analysis means that the vibration of the vehicle body is regarded as the excitation input of the vibration of the cab. Therefore, the damping characteristics of the cab shock absorber can only be approximated, and it is difficult to meet the design requirements of the cab shock absorber. Since the characteristics of the shock absorber are non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D33/10
Inventor 周长城孔艳玲宋群
Owner SHANDONG UNIV OF TECH
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