Multi-stage shock absorber

a shock absorber and multi-stage technology, applied in the field of shock absorbers, can solve the problems of jarring impact, shock absorber bottom out, and limited effectiveness of known jounce control systems

Active Publication Date: 2015-07-09
THYSSENKRUPP BILSTEIN OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]The invention is directed to a system that implements a novel and unobvious jounce con...

Problems solved by technology

In conditions such as off-road driving, the irregularities can be severe and may cause a standard shock absorber to bottom out, i.e. abruptly reaching their maximum compression, ...

Method used

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  • Multi-stage shock absorber
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  • Multi-stage shock absorber

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Embodiment Construction

[0020]The invention is directed to a shock absorber advantageously for use with a vehicle suspension. The shock absorber increases the damping force when there is significant travel of the vehicle suspension. In particular, as the suspension reaches a bottoming out condition during compression, the damping force of the shock absorber increases. The present invention provides unique and novel mechanisms for increasing the damping force depending on the position of the shock absorber during compression so as to significantly reduce or avoid a bottoming out condition. As discussed below, the shock absorber of the present invention sequentially increases the damping force using a multi-stage jounce control configuration.

[0021]For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitatio...

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Abstract

A jounce control damping system with an elongated housing containing a damping medium, a primary piston assembly, a moveable outer piston assembly, and a movable inner piston assembly disposed at least partially within the outer piston assembly. The primary piston assembly provides a first compression damping force. The inner piston engages the primary piston assembly and provides a second compression damping force when moved in a compression direction. After the inner piston assembly moves a given distance, the outer piston assembly is moved in the compressive direction and provides a third compression damping force.

Description

FIELD OF THE INVENTION[0001]The present invention pertains to improvements in shock absorbers, and more particularly to shock absorbers having position-dependent damping force characteristics.BACKGROUND[0002]Shock absorbers are used in vehicles to assist the vehicle in adapting to different driving conditions due to irregularities in the road, such as bumps, potholes, and other road surface anomalies. Shock absorbers are also used to assist a vehicle in traveling over more extreme conditions such as off-road driving.[0003]In conditions such as off-road driving, the irregularities can be severe and may cause a standard shock absorber to bottom out, i.e. abruptly reaching their maximum compression, producing a jarring impact. In order to overcome this deficiency shock absorbers with jounce control have been developed. A jounce control shock absorber provides an elevated damping force when the shock approaches the bottoming out condition. However, known jounce control systems are limit...

Claims

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Application Information

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IPC IPC(8): F16F9/48F16F9/50
CPCF16F9/50F16F9/48F16F9/49F16F9/22F16F9/5126
Inventor SMITH, JUSTIN D.DVORAK, AUSTIN Z.KANE, TERRENCE J.
Owner THYSSENKRUPP BILSTEIN OF AMERICA
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