Frequency-Sensitive Shock Absorber Valve Assembly Against Pilot Valve Peeling
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Solution Overview
Problem
Existing frequency-sensitive shock absorbers experience peeling of rubber or synthetic resin materials in the valve portions of the pilot valve due to high-pressure and high-temperature environments, leading to inadequate damping force performance and compromised ride comfort and driving stability.
Innovation Solution
The upper and lower pilot valves are designed with metal base portions and integrally molded elastic materials, and a metal guide disk is added to maintain metal-to-metal contact, preventing peeling and ensuring a consistent flow path in high-pressure and high-temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rubber or synthetic resin materials are used in the valve portions of the pilot valve, then the damping force characteristics can be adjusted, but the materials peel in high-pressure and high-temperature environments
Solution Approach 1:
The patent employs composite materials by combining metal base portions with elastomeric materials in the pilot valve structure. The metal base provides structural strength and peeling resistance in high-pressure/high-temperature environments, while the elastomeric material maintains the desired damping force characteristics. This composite approach resolves the contradiction between adaptability (damping characteristics) and reliability (peeling resistance).
2Ease of operation
If rubber or synthetic resin materials are used in the valve portions, then the valve can function, but the flow path becomes inconsistent due to peeling
Solution Approach 1:
By using composite materials with metal base portions and elastomeric materials, the patent ensures both valve functionality and flow path consistency. The metal component prevents peeling that would otherwise cause flow path variations, while the elastomeric material enables the valve to perform its function. This resolves the contradiction between ease of operation and manufacturing precision.
3Reliability
If metal base portions with integrally molded elastic materials are used, then peeling is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent merges the metal base portion and elastomeric material into an integrally molded structure, where the elastomeric material is directly formed onto the metal base. This integration reduces the need for separate assembly steps and fasteners, thereby mitigating the increase in manufacturing complexity while maintaining peeling prevention. The merging principle allows the composite structure to be produced as a unified component.
4Manufacturing precision
If a metal guide disk is added to maintain metal-to-metal contact, then flow path consistency is improved, but device complexity increases
Solution Approach 1:
The metal guide disk acts as an intermediary component between the pilot valve elements, maintaining metal-to-metal contact to ensure consistent flow path geometry. While this adds a component to the assembly, the guide disk serves a critical function in preserving flow path consistency, particularly in high-temperature environments where material expansion could otherwise cause variations. The intermediary element resolves the contradiction by providing a stable reference surface for flow control.
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 prevents peeling of the valve portions, maintains damping force performance, and ensures consistent flow paths, enhancing ride comfort and driving stability while reducing manufacturing costs by using existing mass-produced parts.
Implementation Method 1
an upper pilot valve coupled to the piston rod and disposed on top of the pilot chamber and provided to be elastically deformable according to a change in pressure of the pilot chamber
Data Source
AI summary
The present disclosure provides a frequency-sensitive shock absorber capable of implementing target performance of damping force by preventing a valve portion formed of a rubber material or a synthetic resin material constituting a pilot valve of a valve assembly from peeling in a high-pressure and high-temperature environment and securing a flow path, and a valve assembly employed therein. An upper pilot valve and a lower pilot valve each include a base portion in the form of a metal plate and a valve portion integrally molded with the base portion as an elastic material passes through a molded hole formed in a penetrating manner in the base portion, and elastically deformed vertically.