Rebound Retainer and Disk Slit Valve for Extreme-Speed Damping
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Solution Overview
Problem
Existing shock absorbers face challenges in tuning damping force effectively at extremely low and high piston speeds, making it difficult to manufacture a shock absorber that meets the desired damping force requirements during a rebound stroke.
Innovation Solution
A valve device with a rebound retainer and disks that adjust damping force by varying fluid flow through multiple chambers and slits, allowing for precise control of damping force based on piston speed, including a concavely formed first rebound retainer chamber, retainer holes, slits, and protrusions to manage fluid pressure and flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rebound valve and compression valve are used in the shock absorber, then the damping force can be formed by the opening and closing of the valves, but it becomes difficult to tune the damping force when the piston moves at extremely low speed or high speed
Solution Approach 1:
The valve device is segmented into multiple functional components: a rebound retainer with multiple rebound retainer chambers (first, second, third chambers), multiple disks (first disk with slits, second disk), and a rebound valve. Each segment handles specific aspects of fluid flow control at different speed ranges, allowing independent optimization of damping characteristics for low-speed and high-speed operations.
Solution Approach 2:
The system dynamically adapts damping force based on piston speed through the interaction of multiple valves and chambers. The rebound retainer and disks create variable flow paths that automatically adjust resistance according to the speed of piston movement, providing appropriate damping at both extremely low and high speeds without manual intervention.
2Manufacturing precision
If the damping force is formed according to the opening and closing of the rebound valve and compression valve, then the valve mechanism can control fluid flow, but it is difficult to manufacture a shock absorber that satisfies the damping force desired by a driver when the piston moves at extremely low speed
Solution Approach 1:
The invention adds dimensional complexity by introducing multiple rebound retainer chambers arranged in sequence (first, second, third chambers) and multiple disks with slits. This multi-chamber, multi-disk architecture creates additional degrees of freedom in fluid flow control, enabling precise damping adjustment across the entire speed spectrum including extremely low speeds that conventional single-chamber designs cannot achieve.
Solution Approach 2:
The rebound retainer and disks act as intermediary elements between the piston and the rebound valve. These intermediaries create additional flow resistance stages through their chambers and slits, allowing fine-tuned control of fluid flow at low speeds before the fluid reaches the main rebound valve, thus enabling precise damping control at extremely low piston speeds.
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
Enables effective tuning of damping force across different speed ranges, allowing for the manufacture of shock absorbers that meet specific damping force requirements during both low-speed and high-speed piston movements.
Implementation Method 1
a shock absorber stores a fluid therein and generates a damping force by the fluid when the fluid is compressed or rebounded
Implementation Method 2
A rebound valve and a compression valve are installed in the shock absorber, and are opened and closed by the fluid passing through a passage formed inside a piston to form a damping force
Implementation Method 3
During a rebound stroke of the piston, the fluid passing through the retainer hole may form a damping force while passing between the rebound retainer and the first disk
Data Source
AI summary
The present disclosure relates to a valve device and a shock absorber including same. The valve device for controlling a damping force, which is disposed, on one side of a piston having a passage through which fluid moves, inside a shock absorber, includes: a rebound retainer disposed on the one side of the piston and including a first rebound retainer chamber concavely formed in an annular shape to allow a portion of fluid passing through the passage to be stored, and a retainer hole formed in the first rebound retainer chamber; and a first disk for guiding fluid passing through the retainer hole to move through a slit formed in an outer circumferential surface thereof.