Shock Absorber Variable Friction Surfaces for Adaptive Damping
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Solution Overview
Problem
Current shock absorption technologies rely on complex fluid flow solutions and uniform frictional surfaces, which are inefficient and lack adaptability to varying conditions, leading to non-uniform damping responses and increased wear.
Innovation Solution
The implementation of surface treatments with varying coefficients of friction on the inner and outer surfaces of damper components, creating distinct zones for different frictional behaviors based on position and velocity, allowing for reduced valve architectures and adaptive damping responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform surface treatment is used on damper components, then manufacturing is simplified, but frictional forces are non-uniform leading to non-uniform damping responses and increased wear
Solution Approach 1:
The patent applies different surface treatments to different regions of the damper tube and piston shaft surfaces. Specifically, the inner surface of the damper tube and outer surface of the piston shaft are divided into multiple zones (first, second, third regions) with different surface treatments, creating position-dependent coefficients of friction. This local differentiation enables uniform damping responses across various operating conditions while maintaining controlled wear patterns.
2Ease of operation
If complex fluid flow solutions are used, then damping force control is improved, but device complexity increases
Solution Approach 1:
The patent extracts the friction control function from the complex fluid flow system and implements it through surface treatments on the damper tube and piston shaft. By creating position-dependent friction zones, the system achieves adaptive damping force control without requiring complex valve architectures or fluid flow solutions, thereby simplifying the overall device while maintaining operational effectiveness.
3Ease of manufacture
If uniform frictional surfaces are used, then manufacturing is easier, but wear increases due to non-uniform frictional forces
Solution Approach 1:
The patent implements localized surface treatments with different coefficients of friction in specific regions of the damper tube and piston shaft. This creates controlled friction distribution that prevents excessive wear in any single area, thereby extending component service life while maintaining manufacturing feasibility through standardized treatment processes.
4Adaptability or versatility
If position-dependent friction zones are implemented, then adaptability to varying conditions is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the damper tube and piston shaft surfaces into distinct regions (first, second, third regions) with specific surface treatments applied to each. This creates position-dependent friction characteristics that adapt to varying operational conditions. The manufacturing precision is managed through defined region boundaries and standardized treatment processes, balancing adaptability with manufacturability.
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 approach simplifies damper designs, enhances uniformity and adaptability, reduces wear, and improves ride quality by dynamically adjusting frictional forces in response to temperature and operational conditions.
Implementation Method 1
The at least two different surface treatments create a corresponding plurality of coefficients of friction with at least one of the piston surface and the fourth surface respectively
Data Source
AI summary
An exemplary shock absorber includes a damper tube, a damper piston, a piston shaft, and at least two different surface treatments. The damper tube includes an interior surface. The damper piston includes a piston surface that engages the interior surface. The piston shaft couples with the damper piston and includes a shaft surface that engages a fourth surface. The at least two different surface treatments are disposed on at least one of the interior surface and the shaft surface and create a corresponding plurality of coefficients of friction with at least one of the piston surface and the fourth surface respectively.