Design method of automobile semi-active suspension magneto-rheological shock absorber damping channel width

A magneto-rheological shock absorber and semi-active suspension technology, which is applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., and can solve problems such as not giving accurate and reliable design methods

Inactive Publication Date: 2015-04-01
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 searched data, most of the domestic and foreign researches on magnetorheological shock absorbers for semi-active suspensions focus on the research of control strategies and control methods. h This key parameter has not been given an accurate and reliable design method, and most of them select a damping channel width within a range (0.5~2.0mm) based on experience. h After repeated damping characteristic tests and ride comfort tests and modified methods, the damping channel width of the magneto-rheological shock absorber for the semi-active suspension of the car is finally determined. h The actual design value of

Method used

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  • Design method of automobile semi-active suspension magneto-rheological shock absorber damping channel width
  • Design method of automobile semi-active suspension magneto-rheological shock absorber damping channel width
  • Design method of automobile semi-active suspension magneto-rheological shock absorber damping channel width

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: A schematic diagram of a magneto-rheological shock absorber piston cylinder, piston and damping channel 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 length L =40mm; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°; the initial viscosity of the magnetorheological fluid is 0.8Pa.s when no external mag...

Embodiment 2

[0068] Embodiment 2: The structural parameters of the magnetorheological shock absorber of a certain automobile semi-active suspension and the initial viscosity of the magnetorheological fluid are the same as those of Embodiment 1, that is, the inner diameter of the piston cylinder is D H =28mm, piston rod diameter d g =18mm, piston length L =40mm, 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 damping channel width of the magneto-rheological shock absorber of the semi-active suspension of the car h design.

[0069] Using the design steps of Embodiment 1, the width of the damping channel of the magneto-rheological shock absorber h Make a design, ie:

[0070] (1) Determine the optimal damping ratio of the...

Embodiment 3

[0095] Embodiment 3: The structural parameters of the magnetorheological shock absorber of a certain automobile semi-active suspension and the initial viscosity of the magnetorheological fluid are the same as those of Embodiment 1, that is, the inner diameter of the piston cylinder is D H =28mm, piston rod diameter d g =18mm, piston length L =40mm, 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 damping channel width of the magneto-rheological shock absorber of the semi-active suspension of the car h design.

[0096] Using the design steps of Embodiment 1, the width of the damping channel of the magneto-rheological shock absorber h Make a design, ie:

[0097] (1) Determine the optimal damping ratio of th...

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Abstract

The invention relates to a design method of automobile semi-active suspension magneto-rheological shock absorber damping channel width and belongs to the technical field of shock absorbers. Magneto-rheological shock absorber damping channel width h determines the damping characteristic of a semi-active suspension system. From home and abroad, however, no reliable design method is given. A method of repeated experiments and modifications is adopted mostly, and reliable parameter design values are hard to obtain. The design method of the automobile semi-active suspension magneto-rheological shock absorber damping channel width is characterized in that the semi-active suspension magneto-rheological shock absorber damping channel width h is processed through an optimal design according to automobile suspension parameters, shock absorber structure parameters and magneto-rheological liquid initial viscosity. By the adoption of the method, reliable damping channel width h design values can be obtained, suspension system damping characteristic can reach to optimum, the requirements of car driving smoothness can be met on the condition that power is cut off, and the car driving smoothness is improved. At the same time, rate of development of products can be accelerated by the adoption of the method, experiment cost is reduced, and design level, and quality and performance of a magneto-rheological shock absorber is improved.

Description

technical field [0001] The invention relates to a magneto-rheological shock absorber, in particular to a method for designing the width of a damping channel of a magneto-rheological shock absorber for an automobile semi-active suspension. Background technique [0002] The magnetorheological 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. It has become the current domestic and foreign It is a hotspot in the field of vehicle suspension research. Annular damping channel width of magnetorheological shock absorber h It is an important structural parameter of the magnetorheological shock absorber, which determines the damping characteristics of the shock absorber and has an important impact on the ride comfort of the vehicle. Magnetorheological damper damping channel wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/34F16F9/53
Inventor 周长城李红艳宋群
Owner SHANDONG UNIV OF TECH
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