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Damper assembly

a technology of suspension system and sprung mass, which is applied in the direction of shock absorbers, machine supports, transportation and packaging, etc., can solve the problems of disproportionate acceleration of sprung mass, easy transmission of unsprung suspension displacement by the sprung mass, and virtually lossless, and achieves low impedance and damping. , the effect of small displacemen

Inactive Publication Date: 2008-04-03
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a damper assembly for a suspension system of a vehicle. It uses elastomeric or small displacement elastic members to provide stiction-free damping and hydraulic damping. It also acts in series with the existing damper to provide low impedance and required damping for low amplitude dynamic displacements. Additionally, it acts dynamically relatively rigid after the travel limits are engaged for larger displacements. Overall, the damper assembly provides improved performance and efficiency in vehicle suspension systems.

Problems solved by technology

Under such conditions, the damper readily transmits unsprung suspension displacement, virtually lossless (as if it were elastic).
Dynamic forces at the reaction interfaces of the vehicle body are much larger than desired, ultimately producing disproportionately large accelerations of the sprung mass.

Method used

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Examples

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Embodiment Construction

[0018]Referring to the drawings and in particular FIGS. 1 and 2, one embodiment of a damper assembly 10, according to the present invention, is shown for a suspension system, generally indicated at 11, of a vehicle 12 (partially shown). The vehicle 12 has a vehicle body 14 mounted on or integral with a vehicle chassis (not shown). It should be appreciated that the suspension system 11 is operatively connected between an unsprung portion, hereinafter referred to as unsprung mass and a sprung portion or vehicle chassis (not shown) of the vehicle 12.

[0019]The suspension system 11 includes a strut, generally indicated at 16, mounted between the unsprung mass (not shown) and the vehicle body 14 of the vehicle 12. The strut 16 includes a hydraulic cylinder 18 with an attached piston (not shown) and piston rod 20. The hydraulic cylinder 18 is attached to the vehicle chassis at its lower end by a suitable mechanism such as fasteners (not shown). The piston rod 20 slidably extends from the p...

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PUM

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Abstract

A damper assembly for a suspension system of a vehicle includes a housing adapted to be mounted to one end of a strut in the suspension system. The housing has a chamber with fluid therein. The damper assembly also includes at least one diaphragm extending across the chamber to react with the fluid, to be compliant at relatively small displacements, and to be rigid at relatively large displacements.

Description

TECHNICAL FIELD[0001]The present invention relates generally to suspension systems for vehicles and, more particularly, to a damper assembly for a suspension system of a vehicle.BACKGROUND OF THE INVENTION[0002]It is known to provide a suspension system for a vehicle such as a motor vehicle. One form of the suspension system includes a coil spring, one end of which rests in a lower seat moving with the wheel assembly; the opposite end contacts an upper seat of a vehicle body or frame of the vehicle. The spring supports the weight of the vehicle body and allows for reciprocating relative movement between the wheel assembly and the vehicle body during road travel to isolate wheel disturbances from the vehicle body.[0003]In another form of the suspension system, a strut is mounted between the movable suspension elements and the body of the vehicle. The strut typically includes a hydraulic cylinder with an attached piston and piston rod. The piston rod slidably extends from an upper end...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16F9/50
CPCB60G15/04B60G2200/142F16F9/54F16F9/48B60G2204/1242
Inventor OBLIZAJEK, KENNETH L.QUINN, SHAWN G.GREGORY, WILLIAM C.WRIGHT, CARL T.FADLER, GREGORY J.
Owner GM GLOBAL TECH OPERATIONS LLC
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