Fastener With Selectively Variable Dampening for NVH Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fasteners fail to effectively manage noise, vibration, and harshness (NVH) between vehicle components, as they do not provide sufficient dampening characteristics to isolate unwanted sounds and vibrations, leading to transfer of forces between connected components.
Innovation Solution
The integration of a fastener with a dampening unit that provides selectively variable dampening characteristics, allowing for adjustable torque application to achieve target dampening characteristics between components, utilizing either piston-based or spring-based dampening units to compress and isolate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional fasteners are used to connect vehicle components, then the connection is simple and reliable, but noise and vibration transfer between components cannot be effectively reduced
Solution Approach 1:
The patent combines the fastening function and the dampening function into a single integrated fastener unit. The dampening unit is directly connected to the fastener shaft, allowing simultaneous achievement of mechanical connection and vibration isolation without requiring separate components
Solution Approach 2:
The fastener is designed to perform multiple functions: mechanical fastening and variable dampening. By incorporating a dampening unit with selectively variable dampening characteristics, the single fastener can adapt to different NVH requirements while maintaining its primary fastening function
2Adaptability or versatility
If fixed dampening characteristics are used in fasteners, then the dampening performance is consistent, but adaptability to different attachment locations and NVH requirements is limited
Solution Approach 1:
The dampening characteristics of the fastener are made dynamically adjustable through torque application. The dampening unit is designed to change its dampening properties based on the torque applied to the fastener, allowing selective optimization of NVH performance at different attachment locations
Solution Approach 2:
The patent changes the dampening parameter by varying the torque applied to the fastener. Different torque values produce different dampening characteristics, enabling customization of dampening performance without changing the physical structure of the dampening unit
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 effectively reduces noise and vibration transfer by allowing for customizable dampening characteristics at various attachment locations, enhancing the isolation of components and improving the overall NVH performance of vehicles.
Implementation Method 1
The dampening unit can be configured to provide dampening characteristics between the first and the second component, and the dampening characteristics can be selectively variable based on a torque applied to the head
Data Source
AI summary
Two or more vehicle components can be operatively connected with one or more fasteners configured to provide selectively variable dampening characteristics. The fastener can include a dampening unit configured to provide different dampening characteristics based on a torque applied to the fastener. In one or more arrangements, the dampening unit can provide different dampening characteristics based on an amount of compression the dampening unit is under. Target dampening characteristics between two or more components can be determined. A torque can be determined and applied to the fastener based on the target dampening characteristics. The torque can cause the dampening unit of the fastener to compress and provide the target dampening characteristics between the components.