Vibration Damper Guide Element Deflects Fluid Flow
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Solution Overview
Problem
Conventional vibration dampers for motor vehicles face operational reliability and service life issues due to direct exposure of gas bags to damper medium flow, leading to potential damage and failure.
Innovation Solution
A vibration damper design featuring an inner and outer tube with a compensating chamber and a guide element that deflects hydraulic fluid flow during rebound or compression stages, indirectly protecting the gas bag from direct exposure and allowing bidirectional fluid flow for active damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the gas bag is arranged close to the flow inlet to maximize gas bag volume, then the gas bag volume is increased, but the gas bag is exposed to direct flow stream causing damage and reduced reliability
Solution Approach 1:
A guide element is introduced as an intermediary component between the flow inlet and the gas bag. This guide element deflects the hydraulic fluid flow away from the gas bag, allowing the gas bag to be positioned close to the flow inlet for maximum volume while preventing direct flow exposure that would cause damage. The guide element mediates the interaction between the fluid flow and gas bag, enabling both high volume and high reliability.
2Reliability
If the distance between the flow inlet and the gas bag is increased to prevent direct flow, then the gas bag is protected from damage, but the gas bag volume is reduced
Solution Approach 1:
The guide element serves as a mediator that allows the gas bag to maintain maximum volume by being positioned close to the flow inlet, while simultaneously protecting the gas bag from direct flow exposure. Without this intermediary, protecting the gas bag would require increasing the distance from the flow inlet, which would reduce the available gas bag volume.
3Weight of moving object
If a thin composite film gas bag is used to reduce weight, then the gas bag weight is decreased, but the gas bag becomes vulnerable to direct flow damage
Solution Approach 1:
The guide element acts as a protective intermediary that shields the thin composite film gas bag from direct hydraulic fluid flow. This allows the use of lightweight thin film material without sacrificing service life, as the guide element prevents the flow-induced damage that would otherwise limit the durability of thin film constructions.
4Reliability
If the gas bag is omitted in the flow inlet area to prevent damage, then the gas bag is protected from direct flow, but the compensating chamber volume is reduced
Solution Approach 1:
The guide element enables the gas bag to occupy the flow inlet area of the compensating chamber by deflecting the flow away from the gas bag. This maintains maximum compensating chamber volume while ensuring operational safety, as the guide element prevents direct flow contact that would cause gas bag failure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances operational reliability and service life by preventing direct fluid flow to the gas bag, reducing the risk of damage and foaming, while enabling active damping forces through pressure differences, thus improving safety and performance.
Implementation Method 1
the gas bag is compressed
Implementation Method 2
at least one guide element is provided which deflects a flow of the hydraulic fluid during a rebound stage or a compression stage in such a way that the gas bag is indirectly subjected to flow
Implementation Method 3
the hydraulic fluid can thus be favourably conveyed between the working area and the compensating chamber
Data Source
AI summary
The invention relates to a vibration damper for a motor vehicle comprising an inner tube, an outer tube and at least one compensating chamber, which is formed between the inner tube and the outer tube and comprises at least one gas bag, which is arranged in the compensating chamber, wherein the compensating chamber is fluidically connected to at least one working area of the inner tube filled with a hydraulic fluid, wherein at least one guide element is provided, which deflects a flow of the hydraulic fluid during a rebound stage or a compression stage in such a way that the gas bag is indirectly subjected to flow. Furthermore, the invention relates to a motor vehicle.