Vehicle Strut Mount Noise Isolation at the Bearing Interface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle front suspension assemblies generate undesirable noises due to movement between contacting members, which propagate to other parts of the suspension and the vehicle body structure, existing solutions with rubber-like or elastic polymer members being insufficient in completely eliminating these noises.
Innovation Solution
Incorporating a noise isolating layer made of materials like cellulose-based paper or rubber-like materials in the upper area of the vehicle strut assembly between contacting elements, specifically between the bearing assembly and the mounting bracket, to reduce or eliminate noise propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rubber-like or elastic polymer members are introduced into strut assemblies to reduce noises, then noise reduction is improved, but the noises are not completely eliminated
Solution Approach 1:
The patent uses a composite noise isolating member comprising a paper-based material (such as cellulose fiber mat) combined with rubber-like or elastic polymer materials. This composite structure leverages the sound-absorbing properties of the porous paper material and the vibration-damping properties of the rubber material to achieve superior noise isolation compared to using either material alone, thereby completely eliminating noise propagation.
Solution Approach 2:
The patent employs a paper-based noise isolating member with a porous structure (such as a cellulose fiber mat) that allows sound waves to penetrate and be absorbed through friction and conversion to heat energy within the porous network. This porous material is particularly effective at absorbing high-frequency noise components that traditional solid rubber materials cannot adequately dampen.
2Object-affected harmful factors
If noise isolating member is added between contacting elements, then noise isolation is improved, but device complexity increases
Solution Approach 1:
The patent integrates the noise isolating member directly into the existing mounting bracket structure, where the bracket serves dual functions: structural support and noise isolation mounting. The noise isolating member is positioned between the mounting bracket and the bearing assembly, utilizing the existing interface without requiring additional separate components or complex assembly procedures, thus minimizing increase in device complexity.
Solution Approach 2:
The mounting bracket is designed to serve multiple functions: providing structural support for the strut assembly and simultaneously serving as a mounting platform for the noise isolating member. This multi-functionality approach eliminates the need for dedicated noise isolation components that would otherwise be required, thereby reducing overall device complexity while achieving effective noise isolation.
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 undesirable noises transmitted from the strut assembly to the vehicle body structure, enhancing the quiet operation of vehicles by using a noise isolating member with radially inwardly protruding tabs or annular shapes that fit around the mounting bracket, providing effective noise isolation.
Implementation Method 1
a noise isolating member (30) installed to an upper surface (26a) of the bearing assembly (26) and a lower surface (28a) of the mounting bracket (28)... reducing noises transmitted from the vehicle strut assembly to the portion of the vehicle body assembly
Implementation Method 2
Various rubber-like or elastic polymer members have been introduced into strut assemblies of front suspension assemblies in order to reduce such noises
Data Source
AI summary
A vehicle strut assembly includes at least a strut member, a bearing assembly, a mounting bracket and a noise isolating member. The bearing assembly encircles an upper end portion of the strut member. The mounting bracket is configured to receive the bearing assembly with mounting bracket encircling the upper end portion of the strut member and further configured to attach to a portion of a vehicle body assembly of a vehicle. The noise isolating member is installed below the mounting bracket and along a surface of the bearing assembly reducing noises transmitted from the vehicle strut assembly to the portion of the vehicle body assembly.