Pneumatic Tire Noise Damper Standardization
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Solution Overview
Problem
The production efficiency, management efficiency, transportation efficiency, storage efficiency, and cost of pneumatic tires are hindered by the need for multiple types of noise dampers to maintain noise suppression performance and tire uniformity, leading to increased complexity and costs.
Innovation Solution
Grouping tires by cavity sectional area and using noise dampers with a common cross-sectional shape and volume ratio within the range of 1.00 to 1.95 across size groups, ensuring consistent noise suppression performance without compromising durability, and standardizing the circumferential length and spacing of noise dampers to maintain uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple types of noise dampers are used to maintain noise suppression performance and tire uniformity across different tire sizes, then noise suppression performance and tire uniformity are improved, but production efficiency, management efficiency, transportation efficiency, storage efficiency, and cost deteriorate
Solution Approach 1:
The patent applies universality by designing a single type of noise damper that can be used across multiple tire sizes. The noise damper is designed with a standard circumferential length that can be applied to tires within a specific size range, eliminating the need for multiple specialized dampers for different tire dimensions. This universal design maintains noise suppression performance while significantly improving production efficiency, management efficiency, transportation efficiency, and storage efficiency.
2Reliability
If multiple types of noise dampers are used to maintain noise suppression performance and tire uniformity across different tire sizes, then noise suppression performance and tire uniformity are improved, but cost deteriorates
Solution Approach 1:
The patent reduces cost by implementing a universal noise damper design that can serve multiple tire size applications. By standardizing the circumferential length and cross-sectional dimensions, the manufacturer can produce a single type of noise damper in larger volumes, achieving economies of scale. This eliminates the need to maintain inventory and production lines for multiple specialized damper types, thereby reducing overall manufacturing and operational costs.
3Quantity of substance
If noise damper circumferential length is reduced to minimize material use, then material cost is reduced, but tire uniformity deteriorates due to impaired weight balance
Solution Approach 1:
The patent resolves this contradiction by optimizing the parameters of the noise damper, specifically the circumferential length and cross-sectional area. Through parameter optimization, the patent identifies a standard circumferential length that provides sufficient weight balance for tire uniformity while minimizing material consumption. This optimized parameter set achieves the best compromise between material cost and tire uniformity, allowing the noise damper to extend over substantially the entire circumferential length without excessive material use.
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 approach allows for the use of a single type of noise damper across various tire sizes, enhancing production efficiency, reducing costs, and maintaining excellent noise suppression performance while ensuring tire durability and uniformity.
Implementation Method 1
a noise damper which is made of a spongy material and extends circumferentially is fixed onto an inner surface of a tire to ease and absorb a resonance energy generated in the tire cavity, thereby suppressing the cavity resonance to reduce a road noise
Data Source
AI summary
On a tire inner surface “is” facing a tire cavity “i” surrounded by a rim 2 and a pneumatic tire 3, the tire is provided with a noise damper 4 made of a spongy material and extending in the circumferential direction of the tire. Noise dampers 4 having the same cross sectional shape are used in a size group of tires which include a minimum volume tire that the cross sectional area S of the tire cavity on the meridian cross section has a minimum value Smin and a maximum volume tire that the cavity cross section area S has a maximum value Smax, and which have sizes such that the cavity sectional area ratio Smax/Smin falls within the range of 1.00 to 1.95.