Vehicle Cabin Noise Reduction via Elastic Support and Damping
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Solution Overview
Problem
Conventional vehicle cabin noise reduction methods are inefficient due to reliance on extensive acoustic absorbent sheets and reinforcing members, which increase manufacturing costs and vehicle weight, while also failing to adequately absorb noise from vibrations transmitted from the vehicle body.
Innovation Solution
A vehicle cabin configuration featuring a cabin bracket supported by a vehicle body with an elastic member and a weight member attached to a plate-shaped member, along with openings in the cabin surface for acoustic absorbent material to absorb noise effectively, reducing vibration and noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If acoustic absorbent sheets are provided to the floor, ceiling walls, and steering unit to reduce in-cabin noise, then noise reduction is achieved, but manufacturing cost and assembly time increase significantly
Solution Approach 1:
The invention extracts the noise reduction function from the traditional acoustic absorbent sheet and relocates it to a damping treatment layer integrated into the floor panel structure. This allows the noise reduction function to be achieved through a more cost-effective integrated design rather than adding separate acoustic sheets throughout the cabin.
Solution Approach 2:
The invention merges the floor panel structure with the noise reduction function by integrating a damping treatment layer directly into the floor panel. This combination eliminates the need for separate acoustic absorbent sheets and reduces overall manufacturing cost while maintaining noise reduction effectiveness.
2Object-affected harmful factors
If acoustic absorbent sheets are provided to the floor, ceiling walls, and steering unit to reduce in-cabin noise, then noise reduction is achieved, but assembly time and productivity are adversely affected
Solution Approach 1:
The invention merges the noise reduction function with the floor panel manufacturing process by integrating the damping treatment layer during floor panel production. This integration eliminates the need for separate assembly steps to install acoustic sheets, thereby improving assembly productivity without sacrificing noise reduction performance.
3Object-affected harmful factors
If reinforcing members or steel plates are attached to the floor and ceiling walls to suppress vibration, then vibration and noise are reduced, but vehicle weight and manufacturing cost increase
Solution Approach 1:
The invention uses a damping treatment layer, which is a thin film or coating applied to the floor panel, to suppress vibration and reduce noise. This approach is significantly lighter than traditional reinforcing members or steel plates while achieving the same vibration suppression effect.
Solution Approach 2:
The invention changes the approach from adding heavy rigid reinforcing members to applying a damping treatment layer that modifies the vibrational characteristics of the existing floor panel. This parameter change in the structural approach enables vibration suppression with minimal weight increase.
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
This configuration efficiently reduces in-cabin noise by absorbing vibrations and noise through the elastic support and acoustic absorbent material, while minimizing manufacturing costs and vehicle weight.
Implementation Method 1
an elastic member for supporting the cabin, disposed between the cabin and the cabin bracket
Implementation Method 2
an acoustic absorbent material disposed on an inner surface of the inside surface provided with the openings portion
Data Source
AI summary
A vehicle with a cabin comprises a vehicle body supported by a plurality of wheels; a cabin bracket supported by the vehicle body; an elastic member for supporting the cabin, disposed between the cabin and the cabin bracket; and a weight member attached to a plate-shaped member of the cabin.