Damped Automotive Driveline Component Using Metal Wire Strands
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Solution Overview
Problem
Automotive driveline components experience unwanted vibrations and oscillations during operation, leading to noise and other issues that existing solutions have not fully addressed.
Innovation Solution
Incorporating multiple metal wire strands within a casing or tube, held by a vibration-transmitting attachment, which allows relative movement to dampen vibrations by converting vibrational energy into heat through friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional vibration damping methods are used in automotive driveline components, then some vibration reduction is achieved, but the vibrations and oscillations are not fully eliminated and noise issues persist
Solution Approach 1:
The patent changes the physical parameters of the damping system by using multiple metal wire strands with specific material properties (metal composition, wire diameter, strand configuration) that allow optimal energy dissipation through friction. The wire strands are positioned at specific locations within the casing to target different vibration modes, transforming the damping mechanism from a generic approach to a parameter-optimized solution that effectively eliminates vibrations and oscillations.
2Object-affected harmful factors
If metal wire strands are added to dampen vibrations, then vibration damping effectiveness is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The dampener is segmented into multiple independent metal wire strands rather than using a single solid damping element. This segmentation allows each strand to independently interact with vibration sources and facilitates easier installation and positioning within the casing. The segmented structure also simplifies manufacturing compared to creating a single complex damping component, as individual wire strands can be produced separately and then assembled into the dampener configuration.
Solution Approach 2:
The patent uses flexible metal wire strands that can deform and move relative to each other during vibration damping operation. These flexible elements are contained within a casing that provides structural support while allowing the wires to move freely. This combination of flexible damping elements with a simple protective casing reduces overall device complexity compared to rigid, monolithic damping structures.
3Object-affected harmful factors
If multiple metal wire strands are used for vibration damping, then vibration energy dissipation is improved, but the weight of the component increases
Solution Approach 1:
The patent employs multiple thin metal wire strands as disposable-like damping elements that are inexpensive to manufacture and replace if needed. Each individual wire strand is lightweight, and while collectively they provide significant vibration damping, their total weight remains minimal compared to traditional solid damping materials. The wire strands can be made from common metals that offer good damping properties at low cost and low weight.
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
Effectively reduces or eliminates vibrations and oscillations in driveline components, as demonstrated by graphs showing significant reduction in vibration levels and sound pressure, improving operational quietness and stability.
Implementation Method 1
relative movement among the metal wire strands serves to damp the vibrations experienced by the wall
Data Source
AI summary
A damped automotive driveline component can be propshaft, a bar shaft, a torque tube housing, a power transfer unit (PTU) housing, or a final drive unit (FDU) housing, among other possibilities. The component is equipped with a dampener in order to dissipate vibration experienced during use of the component. The damper includes metal wire strands. Relative movement among the metal wire strand is believed to damp the vibrations.