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Optimizing design method of automotive semi-active suspension magnetorheological damper piston length

A technology of magneto-rheological shock absorber and semi-active suspension, which is applied in the direction of shock absorber, shock absorber, spring/shock absorber, etc., and can solve the problems of unspecified accuracy and reliability

Inactive Publication Date: 2013-07-17
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the information obtained, due to the restriction of the optimal damping matching theory of the suspension system, the current domestic and foreign regulations on the piston length of the magneto-rheological shock absorber L This key parameter has not yet been given an accurate and reliable design method, mostly based on the structural parameters of the shock absorber and the gap between the pistons. h size, select a piston length L The parameter value of the magneto-rheological shock absorber is finally determined by repeated tests, verification and modification methods. L The actual design value of

Method used

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  • Optimizing design method of automotive semi-active suspension magnetorheological damper piston length
  • Optimizing design method of automotive semi-active suspension magnetorheological damper piston length
  • Optimizing design method of automotive semi-active suspension magnetorheological damper piston length

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one : Schematic diagram of the piston cylinder, piston and damping channel of a magneto-rheological shock absorber for a semi-active suspension of an automobile, as shown in figure 2 As shown, the shock absorber piston cylinder 1, piston 2, electromagnetic coil 3, and piston rod 4, wherein the electromagnetic coil 3 is embedded in the middle of the piston, and the annular gap between the piston 2 and the piston cylinder 1 h , which is the width of the damping channel of the MR damper h . The sprung mass of the car's single-wheel suspension m 2 =300kg, suspension stiffness k 2 =13057N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; the inner diameter of the piston cylinder of the magneto-rheological shock absorber is D H =28mm, piston rod diameter d g =18mm, piston ring gap h =0.8mm; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°; the viscosity of the magnetorheological fluid is 0.8Pa.s when no magneti...

Embodiment 2

[0060] Embodiment two : The structural parameters of a certain automobile semi-active suspension magneto-rheological shock absorber and the initial viscosity of the magneto-rheological fluid are all the same as those in Example 1, that is, the inner diameter of the piston cylinder is D H =28mm, piston rod diameter d g =18mm, piston ring gap h =0.8mm;, the initial viscosity of the magnetorheological fluid is 0.8Pa.s; the sprung mass of the single-wheel suspension of the car m 2 =350kg, suspension stiffness k 2 = 16719N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°; the piston length of the magneto-rheological shock absorber of the semi-active suspension of the car L design.

[0061] Adopt the design procedure of embodiment one, the piston length of the magneto-rheological shock absorber of this automobile semi-active suspension L Make a design, ie:

[0062] (1) Determine...

Embodiment 3

[0083] Embodiment three : The structural parameters of a certain automobile semi-active suspension magneto-rheological shock absorber and the initial viscosity of the magneto-rheological fluid are all the same as those in Embodiment 1, that is, the inner diameter of the piston cylinder is D H =28mm, piston rod diameter d g =18mm, piston gap h =0.7mm, the initial viscosity of the magnetorheological fluid is 0.8Pa.s; the sprung mass of the single-wheel suspension of the car m 2 =400kg, suspension stiffness k 2 = 20884N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°; the piston length of the magneto-rheological shock absorber of the semi-active suspension of the car L design.

[0084] Adopt the design procedure of embodiment one, the piston length of the magneto-rheological shock absorber of this automobile semi-active suspension L Make a design, ie:

[0085] (1) Determine ...

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Abstract

The invention relates to an optimizing design method of automotive semi-active suspension magnetorheological damper piston length, belongs to the technical field of magnetorheological dampers, aiming to solve the problem that currently, no reliable design method of the magnetorheological damper piston length L is provided domestically and internationally, and repetitiously testing and modifying methods are adopted mostly. The optimizing design method is characterized in that according to automotive single wheel parameters and damper mounting angles, designed speed points of optimum damping characteristics and piston length of the magnetorheological damper are determined; and according to damper structure parameters and magnetorheological liquid viscosity, a designed mould of the automotive semi-active suspension magnetorheological damper piston length is established and design is performed. By the aid of the optimizing design method, a reliable designed value of the automotive semi-active suspension magnetorheological damper piston length can be obtained, requirements of different automobiles to semi-active suspension system damping characteristics are met, product developing speed is increased, testing cost is reduced, product designing level, quality and performance are improved, and smoothness and safety of automobile running on the condition of power outage can be guaranteed.

Description

technical field [0001] The invention relates to a magneto-rheological shock absorber, in particular to an optimal design method for the piston length of the magneto-rheological shock absorber of a semi-active suspension of an automobile. Background technique [0002] The magneto-rheological shock absorber can control the damping force of the shock absorber by controlling the magnitude of the current. It has the characteristics of fast response, low power consumption, large adjustment range, etc., and the working conditions are relatively simple. At present, domestic and foreign automobile suspension A hotspot in the field of frame research. Piston length L It is an important structural parameter of the magnetorheological shock absorber, which determines the flow damping characteristics of the shock absorber, and has an important impact on the characteristics of the semi-active suspension and the ride comfort of the car. Piston length L The parameter design value of the M...

Claims

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Application Information

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IPC IPC(8): F16F9/32F16F9/53
Inventor 周长城李红艳孔艳玲
Owner SHANDONG UNIV OF TECH
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