Suspension Fork Air Bleed Assembly for Elevation Pressure Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle suspension systems face increased axial friction due to differential air pressure when assembled at low elevations and used at high elevations, leading to higher friction in telescoping suspension forks, which affects performance.
Innovation Solution
A manually adjustable air bleed assembly that allows users to equalize air pressure within the fork by releasing excessive pressure, reducing friction and preventing oil bath leakage, by using a button-activated mechanism that vents air pressure to match ambient pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suspension fork is assembled at low elevation with sealed air pressure, then the seal is protected during assembly, but axial friction increases significantly when used at high elevations due to pressure differential
Solution Approach 1:
The patent applies an adjustable air bleed assembly that allows the sealed air pressure to be dynamically adjusted based on elevation changes. The assembly includes a valve mechanism that can be operated to release or retain air pressure, transforming the static sealed system into a dynamically adaptable one that maintains optimal pressure differential across varying operating conditions.
Solution Approach 2:
The invention changes the pressure parameter of the sealed air by providing a controlled bleed mechanism. This allows the internal air pressure to be adjusted to match external ambient pressure at different elevations, thereby reducing the pressure differential that causes excessive axial friction on the seal while maintaining sufficient pressure for seal protection.
2Ease of manufacture
If air pressure is sealed inside the fork at assembly, then manufacturing is simplified, but performance deteriorates at high elevations due to increased friction
Solution Approach 1:
The air bleed assembly is designed as a separate, modular component that can be independently manufactured and then integrated into the fork assembly. This segmentation allows the main fork body to be manufactured with simple sealing, while the adjustable bleed function is added as a distinct module, maintaining manufacturing simplicity while enabling performance adjustment.
3Object-affected harmful factors
If the seal is positioned to equalize pressure, then friction is reduced, but oil bath leakage risk increases due to pressure differential
Solution Approach 1:
The air bleed assembly acts as an intermediary mechanism between the sealed air pressure system and the external atmosphere. It provides controlled pressure equalization that prevents both excessive pressure differential (which causes friction) and complete pressure equalization (which could cause oil leakage). The assembly mediates the pressure relationship to maintain optimal operating conditions.
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 effectively reduces friction in vehicle suspension forks by equalizing air pressure, maintaining the oil bath within the fork and improving ride quality across varying elevations.
Implementation Method 1
allows users to equalize air pressure within the fork by releasing excessive pressure, reducing friction and preventing oil bath leakage, by using a button-activated mechanism that vents air pressure to match ambient pressure
Data Source
AI summary
An air bleed system for a suspension fork or shock absorber includes: a fluid passage between an interior of the suspension and an exterior of the suspension; and a manually operable valve having a first position substantially closing the fluid passage and a second position allowing fluid flow between the interior and the exterior.