Vehicle Wheel Helmholtz Resonator Segmentation
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Solution Overview
Problem
Conventional vehicle wheels with reduced Helmholtz resonators fail to uniformly suppress air column resonance noise, leading to uneven noise reduction and increased manufacturing costs and weight.
Innovation Solution
A vehicle wheel design featuring four Helmholtz resonators divided into two pairs, with each pair integrally formed to create an additional air chamber member, arranged at approximately 90-degree intervals around the wheel rotation center, reducing the number of additional air chambers from four to two while maintaining effective noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of Helmholtz resonators is reduced to decrease manufacturing cost and weight, then manufacturing cost and weight are reduced, but noise reduction effectiveness deteriorates due to uneven suppression of air column resonance noise
Solution Approach 1:
The invention divides the wheel into four segments (quarters) and places one Helmholtz resonator in each segment, arranged at 90-degree intervals around the wheel rotation center. This segmentation ensures uniform noise reduction coverage across the entire wheel circumference, preventing the uneven noise suppression that occurs when resonators are reduced in number.
Solution Approach 2:
The invention integrates the Helmholtz resonators with the wheel structure itself, forming an integrated component rather than separate attachments. The resonators are built into the wheel body during manufacturing, which reduces the number of separate parts and assembly steps, thereby lowering manufacturing cost while maintaining effective noise reduction through optimal positioning.
2Weight of moving object
If the number of Helmholtz resonators is reduced to decrease weight, then weight is reduced, but noise reduction effectiveness deteriorates due to uneven suppression of air column resonance noise
Solution Approach 1:
The wheel circumference is divided into four equal segments with one Helmholtz resonator positioned in each segment at 90-degree intervals. This segmentation achieves the minimum effective number of resonators (four) required for uniform noise suppression, avoiding both the weight penalty of excessive resonators and the performance loss of insufficient resonators.
Solution Approach 2:
The Helmholtz resonators are merged with the wheel structure as an integrated component, eliminating the need for separate mounting hardware and reducing overall weight compared to using more numerous resonators or separate attachments, while maintaining optimal noise reduction performance.
3Reliability
If four Helmholtz resonators are used to maintain noise reduction effectiveness, then noise reduction effectiveness is maintained, but manufacturing cost and weight increase compared to reduced configurations
Solution Approach 1:
The Helmholtz resonators are integrated into the wheel structure during the manufacturing process, forming a single unified component. This merging approach reduces the total part count, simplifies assembly operations, and lowers manufacturing cost compared to producing and installing four separate resonator units, while maintaining the noise reduction effectiveness provided by four strategically positioned resonators.
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 design reduces manufacturing costs and weight while ensuring consistent noise reduction across the wheel circumference, eliminating the need for counterweights and enhancing the stiffness of the additional air chambers.
Implementation Method 1
a wheel has been disclosed which has Helmholtz resonators each including an additional air chamber communicated with a tire air chamber through a communication through hole
Data Source
Figure 1
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AI summary
In a vehicle wheel 1, the communication through holes 20a, 20b, 20c, 20d of the first Helmholtz resonators 19a, 19b,19c,19d are arranged at an angle interval of approximately 90 degrees around a wheel rotation center Ax. The Helmholtz resonators 19a, 19b are formed integrally each other to form the first additional air chamber member 10a. The Helmholtz resonators 19c, 19d are formed integrally each other to form the second additional air chamber member 10b. The additional air chamber member 10a, 10b includes two additional air chambers SC therein. Each of the communication through holes 20a, 20b, 20c, 20d communicates the tire air chamber MC individually.