Pneumatic Tire Inner Liner Resonance Noise Reduction
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Solution Overview
Problem
Existing pneumatic tires face challenges in reducing resonance noise due to cavity resonance, as sound absorbing materials attached post-production can fall off during driving, and existing solutions do not effectively address noise reduction in the 200 Hz to 300 Hz frequency range.
Innovation Solution
Integrally forming resonance noise-reducing members on the inner liner of the tire at irregular intervals, protruding 20 mm or more, with a thickness of 2 mm or more, and made from the same material as the inner liner, to reduce resonant vibrations and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sound absorbing material is separately attached to the interior of the tire after production, then the cavity resonance noise can be reduced, but the sound absorbing material may fall off during driving due to impact
Solution Approach 1:
The sound absorbing member is integrated into the inner liner as a single unified structure during the tire manufacturing process. The inner liner and sound absorbing member form an integrated composite structure that prevents separation and ensures reliable attachment, eliminating the problem of materials falling off during driving.
Solution Approach 2:
The sound absorbing member is prepared and positioned within the inner liner structure before the tire vulcanization process. This preliminary positioning ensures that the sound absorbing member is properly integrated into the tire structure from the beginning, preventing any subsequent detachment issues during vehicle operation.
2Object-affected harmful factors
If sound absorbing material is attached to reduce resonance noise, then the noise level in 200 Hz to 300 Hz frequency region can be reduced, but the attachment process increases manufacturing complexity
Solution Approach 1:
The sound absorbing member is combined with the inner liner into a single integrated component that is manufactured together during the tire production process. This integration eliminates the need for separate attachment steps, reducing manufacturing complexity while maintaining effective noise reduction in the 200 Hz to 300 Hz frequency range.
Solution Approach 2:
The inner liner structure serves dual functions: providing the structural barrier function of the inner liner and incorporating the sound absorbing function through the integrated sound absorbing member. This multi-functionality reduces the number of separate components and simplifies the manufacturing process.
3Object-affected harmful factors
If multiple sound absorbing members are attached to effectively reduce resonance noise, then the noise reduction effect is improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
Multiple sound absorbing members are pre-positioned within the inner liner structure before vulcanization. This preliminary arrangement allows all sound absorbing members to be integrated into the tire structure in a single manufacturing step, maintaining effective noise reduction while avoiding multiple separate attachment operations that would reduce productivity.
Solution Approach 2:
Multiple sound absorbing members are combined with the inner liner as a single integrated structure during manufacturing. This integration allows all sound absorbing members to be produced simultaneously with the tire in one vulcanization cycle, maintaining effective noise reduction through multiple members while preserving manufacturing efficiency.
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 prevents noise-reducing members from falling off during high-speed driving, effectively reduces resonant noise, enhances ride comfort, and improves fuel efficiency by integrating noise-reducing features within the tire manufacturing process, eliminating the need for post-treatment attachments.
Implementation Method 1
one of the causes for the generation of tire noise is the cavity resonance noise generated by vibration of the air filling the interior of a tire. The tire cavity resonance noise is generated when the tread part of a tire touching the road surface during vehicle driving vibrates due to the unevenness of the road surface, and this vibration again vibrates the air inside the tire cavity.
Implementation Method 2
A plurality of resonance noise-reducing members 100 are disposed on an inner liner 10 of a tire... to reduce the interference of resonance noise generated inside the tire
Data Source
AI summary
A pneumatic tire for resonance noise reduction, which includes a plurality of resonance noise-reducing members that are disposed along the circumferential direction of the inner liner of a tire, and are formed to protrude from the inner liner so as to reduce the interference of the resonance noises generated inside the tire. The resonance noise-reducing members are formed at an irregular interval of disposition along the circumferential direction of the inner liner.