Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Design method for optimum speed characteristics of trunk cab damper

A technology of optimal speed and design method, applied to the upper structure, vehicle parts, upper structure of the truck, etc., can solve the problems that cannot meet the design requirements of the comfort of the vehicle cab

Inactive Publication Date: 2015-04-01
SHANDONG UNIV OF TECH
View PDF5 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

[0068] Example 1: The single-sided suspension mass of a truck's full-floating cab m 3 =500kg, one-sided suspension corresponds to the elastic coefficient K of the cab suspension s =150000N / m; the weight of the cab with a single point of the front suspension, m 3d =300kg, the single point of the front suspension corresponds to the elastic coefficient K of the cab suspension sd =75000N / m; the body mass corresponding to a single wheel m 2 =3800kg, which is the mass of sprung, suspension spring stiffness K=100000N / m, suspension damping C=9084N.s / m; mass of unsprung tire m 1 =200kg, tire stiffness K t =900000N / m; C-level road reference spatial frequency n 0 =0.1m -1 Under road power spectral density value G q (n 0 )=256×10 -6 m 3 , Vehicle speed ν=60km / h; shock absorber installation lever ratio i=0.95, installation angle θ=0°; shock absorber restoration stroke initial valve opening speed V k1 =0.3m / s, the maximum valve opening speed V k2 =1m / s; the first valve opening speed of the comp...

Embodiment 2

[0125] Example 2: The mass of the cab carried by a single shock absorber at the rear suspension point of a truck with a full-floating cab 3d =200kg, the single point of rear suspension corresponds to the elastic coefficient K of cab suspension sd = 75000N / m; other vehicle parameters and shock absorber parameters are the same as in example one.

[0126] The design steps of the first embodiment are adopted, namely:

[0127] (1) Determine the optimal damping ratio ξ of the cab suspension system o :

[0128] According to the one-side suspension mass of the cab m 3 =500kg, one-sided suspension stiffness K s =150000N / m, the sprung mass corresponding to the single wheel m 2 = 3800kg, suspension stiffness K = 100000N / m, suspension damping C = 9084N.s / m, mass of unsprung tire m 1 =200kg, tire stiffness K t =900000N / m; C-level road reference spatial frequency n 0 =0.1m -1 ; Reference spatial frequency n 0 Under road power spectral density value G q (n 0 )=256×10 -6 m 3 , And the vehicle speed ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 method for designing an optimal speed characteristic of a shock absorber in a cab, especially a truck cab shock absorber. Background technique [0002] The damping characteristics of the cab shock absorber have an important influence on the vibration damping effect of the cab and the comfort of the driver. However, because the full-floating cab suspension system is a three-mass vibration system composed of wheels, body mass, and cab, its analysis and calculations are very complicated, and many domestic and foreign vehicle engineering experts have to adopt simplified single-mass vibration system models. The analysis shows that the vehicle body vibration is regarded as the excitation input of the cab vibration. 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. Because the characteristics of shock absorbers are nonl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B62D33/10
Inventor 周长城孔艳玲宋群
Owner SHANDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com