Magnetic Plunger Shock Absorber for Selective Damping Control
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Solution Overview
Problem
Conventional variable damping force shock absorbers require complex systems, multiple sensors, and are expensive due to their intricate valve flow paths, which complicates real-time damping force control and increases costs.
Innovation Solution
A variable damping force shock absorber design featuring a tube cylinder with a fluid-filled inner and outer tube, a valve housing with a magnet and plunger that selectively opens and closes a connection flow path using a magnetic field, allowing fluid to pass through either a first piston valve for hard mode or a second piston valve for soft mode, reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional variable damping force shock absorbers use multiple sensors and complicated valve flow paths to control damping force, then real-time damping force control is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the hard damping force and soft damping force control functions into a single integrated valve body structure. The first piston valve and second piston valve are merged into one component that can selectively connect different flow paths (first flow path for hard damping, second flow path for soft damping) through a single valve mechanism, eliminating the need for separate complex valve assemblies and multiple sensors while maintaining real-time control capability
Solution Approach 2:
The valve body is designed as a multi-functional component that can perform multiple damping force control functions through a single structure. By incorporating both the first piston valve and second piston valve within one valve body, the system achieves universal control over both hard and soft damping forces without requiring additional separate control systems, thereby reducing overall device complexity
2Adaptability or versatility
If conventional variable damping force shock absorbers use multiple sensors and complicated valve flow paths, then damping force adjustment is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple damping force control functions into a single integrated valve body structure with first and second piston valves. This consolidation reduces the total number of components that need to be manufactured and assembled, simplifying the manufacturing process and reducing costs while maintaining the ability to adjust between hard and soft damping forces
Solution Approach 2:
The integrated valve body serves multiple functions by incorporating both hard damping force control and soft damping force control capabilities within a single component. This multi-functionality eliminates the need for separate valve assemblies and reduces manufacturing complexity, thereby lowering production costs while preserving full damping force adjustment versatility
3Ease of operation
If conventional variable damping force shock absorbers use separate back pressure flow path and soft flow path, then damping force control is achieved, but device complexity increases
Solution Approach 1:
The patent combines the back pressure flow path control and soft flow path control into a single integrated valve body structure. The first piston valve and second piston valve work together within one component to manage both flow paths, eliminating the need for separate complex valve assemblies while maintaining the ability to control damping force effectively
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 selective use of soft or hard damping forces, enhancing ride comfort and steering stability while simplifying the structure and reducing manufacturing costs, enabling independent tuning of first and second piston valves for improved control.
Implementation Method 1
a magnet provided at an upper portion of the valve housing and connected to the piston rod, and a plunger disposed between the magnet and the second piston valve to selectively open and close the connection flow path by a magnetic field of the magnet
Data Source
AI summary
Disclosed is a variable damping force shock absorber including a tube cylinder having an inner tube filled with a fluid and an outer tube, a valve housing coupled to a piston rod in the inner tube and having a connection flow path formed therein, a first piston valve coupled to the outside of the valve housing to partition the inner tube into a compression chamber and a rebound chamber, and a second piston valve provided inside the valve housing, wherein the valve housing includes a magnet provided at an upper portion thereof and connected to the piston rod, and a plunger disposed between the magnet and the second piston valve at a lower portion thereof to selectively open and close the connection flow path by a magnetic field of the magnet, and wherein the fluid passes only through the first piston valve when the plunger closes the connection flow path, and the fluid passes through the first piston valve and the second piston valve when the plunger opens the connection flow path.