Bicycle Damper Dual-Valve Compression for Faster Shock Response
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Solution Overview
Problem
Current bicycle suspension systems experience delays in shock absorption due to high cracking pressure requirements and fail to effectively absorb high-frequency vibrations, leading to a 'stick-slip' feel and reduced traction.
Innovation Solution
The proposed damper system includes a piston with a bypass compression port and a primary compression port, where the bypass valve opens at a lower cracking pressure to allow initial fluid flow, reducing initial resistance and enabling quicker shock absorption, and a secondary valve for increased damping during the majority of the stroke, improving traction and overall suspension performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single valve with high cracking pressure is used for compression damping, then sufficient damping force is provided during most of the stroke, but initial shock absorption is delayed and high-frequency vibrations are not effectively absorbed
Solution Approach 1:
The compression damping system is segmented into two separate valves: a bypass valve with low cracking pressure that opens first to absorb initial shocks and high-frequency vibrations, and a primary valve with high cracking pressure that opens later to provide damping during the majority of the compression stroke. This segmentation allows each valve to specialize in different phases of compression, resolving the contradiction between fast initial response and sustained damping performance.
2Force
If high cracking pressure is used in the primary valve, then adequate damping force is maintained during most of the compression stroke, but initial shock absorption is delayed causing a stick-slip feel
Solution Approach 1:
The bypass valve performs preliminary action by opening at low cracking pressure to absorb initial shocks and high-frequency vibrations before the primary valve activates. This preliminary damping action eliminates the stick-slip feel and delays no longer occur, while the primary valve subsequently provides the necessary damping force for the remainder of the compression stroke.
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
This design allows for faster shock absorption and improved traction by reducing initial resistance and providing increased damping during the majority of the compression stroke, enhancing the bicycle's ability to handle bumps and vibrations.
Implementation Method 1
a first valve to control fluid flow through the primary compression port
Implementation Method 2
a second valve to control fluid flow through the bypass compression port
Data Source
AI summary
Bicycle suspension components are described herein. An example damper for a bicycle suspension component includes a damper body defining a chamber and a damper member disposed in the chamber. The damper member includes a piston having a first compression port and a bypass compression port. The damper member includes a first valve to control fluid flow through the first compression port and a second valve to control fluid flow through the bypass compression port. During a first portion of travel of the damper member during a compression stroke, the second valve is to open to enable fluid flow through the bypass compression port from a first chamber to a second chamber, and during a second portion of travel of the damper member during the compression stroke, the first valve is to open to enable fluid flow through the first compression port from the first chamber to the second chamber.