Fluid Damper Compression Circuit With Regressive High-Speed Damping
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Solution Overview
Problem
Existing fluid dampers for bicycles and similar applications require multiple compression circuits, complex control systems, or inertia valves to achieve a damping profile favorable for both low- and high-speed compression forces, which can be inconvenient and inefficient.
Innovation Solution
A fluid damper utilizing a single compression circuit with a Belleville spring and pre-load configuration that produces a regressive damping profile across the entire high-speed operating range, maintaining maximum damping at low speeds and reducing damping at high speeds without the need for manual adjustments or complex systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple compression circuits are used to achieve favorable damping profile for both low- and high-speed compression forces, then the damping performance is improved, but the device complexity increases
Solution Approach 1:
The patent combines low-speed and high-speed compression circuits into a single integrated compression circuit. The circuit uses a progression valve with a non-linear flow characteristic that automatically adapts to different compression speeds, eliminating the need for separate circuits while maintaining favorable damping performance across the full speed range.
Solution Approach 2:
The patent changes the flow characteristic parameter of the compression circuit from linear to non-linear progression valve. This parameter change allows the single circuit to provide different damping characteristics at different speeds, achieving the performance of multiple circuits with a single simplified design.
2Reliability
If adjustable compression circuit is used to achieve favorable damping profile, then the damping performance is improved, but the ease of operation deteriorates due to requiring manual adjustments
Solution Approach 1:
The patent implements a self-adjusting compression circuit that automatically adapts to different compression speeds through its non-linear progression valve design. The system requires no manual adjustments or user intervention, as the valve's inherent characteristics cause it to self-regulate damping forces across the full speed range, improving ease of operation while maintaining damping performance.
3Device complexity
If single compression circuit with linear flow characteristic is used, then the device complexity is reduced, but the damping performance deteriorates for high-speed compression forces
Solution Approach 1:
The patent changes the flow characteristic parameter from linear to non-linear progression valve. This modification allows the single circuit to provide progressive resistance that increases appropriately with compression speed, maintaining favorable damping performance for both low- and high-speed forces while keeping device complexity low.
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 provides a simple and effective damping profile that optimizes pedaling efficiency at low speeds and smooths out high-speed impacts, eliminating the need for multiple circuits or control systems, ensuring consistent performance across the full range of compression forces.
Implementation Method 1
A fluid damper utilizing a single compression circuit with a Belleville spring and pre-load configuration that produces a regressive damping profile
Implementation Method 2
Compression damping forces are created by the compression damping circuits restricting fluid flow
Data Source
AI summary
A fluid damper is provided that has a compression damping profile that is favorable for damping the full range of compression forces, including low- and high-speed compression forces. While achieving this compression damping profile, the damper has a mode that does not require: (1) both low- and high-speed compression circuits; (2) the rider or a complicated control system to make adjustments to the compression circuit to achieve the different compression damping curves/profiles; and/or (3) the use of an inertia valve. The damping curve should be at least non-increasing and may be regressive across substantially the entire high-speed operating range of the damper.