Tire Side Section Turbulence Protrusions for Heat and Durability
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Solution Overview
Problem
Heavy load tires face durability issues due to deformation of the carcass section during manufacturing of turbulence-generating protrusions, which are intended to reduce temperature increases, and existing solutions do not adequately address both temperature reduction and durability simultaneously.
Innovation Solution
A tire design featuring a circumferential recessed section with turbulence-generating protrusions positioned within a specific thickness range relative to the tire reference thickness, minimizing deformation and enhancing cooling effects while maintaining durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If turbulence-generating protrusions are formed in a region where the circumferential recessed section is formed, then the temperature increase is more efficiently reduced, but the tire durability is apt to be deteriorated due to deformation of the carcass section during manufacturing
Solution Approach 1:
The patent applies local quality by specifying different thickness requirements for different regions of the tire side section. The circumferential recessed section is formed with a controlled thickness (20-80% of reference thickness) specifically in the region where turbulence-generating protrusions will be formed, while other regions maintain their original thickness. This localized thickness control allows turbulence formation for cooling while preventing carcass section deformation in critical areas, thus resolving the contradiction between temperature reduction and durability.
Solution Approach 2:
The patent changes the thickness parameter of the circumferential recessed section to optimize both cooling effectiveness and structural integrity. By controlling the thickness within a specific range (20-80% of reference thickness), the patent achieves sufficient turbulence generation for heat dissipation while maintaining enough material strength to prevent carcass cord deformation during manufacturing, thereby resolving the technical contradiction.
2Temperature
If the thickness of rubber in the circumferential recessed section is reduced to enable turbulence-generating protrusion formation, then cooling effect is improved, but the carcass section deformation occurs during manufacturing
Solution Approach 1:
The patent implements local quality by applying thickness reduction only in specific regions where circumferential recessed sections are formed, rather than uniformly across the entire tire side section. The thickness is controlled to be 20-80% of the reference thickness only in the recessed region, while other areas maintain full thickness. This localized approach enables turbulence generation for cooling while preserving manufacturing precision in critical structural areas.
Solution Approach 2:
The patent applies partial action by forming the circumferential recessed section with reduced thickness only in the specific region where turbulence-generating protrusions are needed, rather than reducing thickness throughout the entire tire side section. This partial thickness reduction achieves the cooling effect through turbulence while avoiding excessive thinning that would cause carcass section deformation during manufacturing.
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
Simultaneously reduces temperature increases in the tire side section and improves tire durability by optimizing the placement and design of turbulence-generating protrusions within the tire side section.
Implementation Method 1
providing a turbulence-generating protrusion, which projects outward in a tire width direction from an outer surface of the tire side section, in a portion of the tire side section to generate turbulence of air on the outer surface of the tire side section
Data Source
AI summary
The carcass of this tire (1) has a carcass body and folded sections each folded around a bead core. A circumferential recessed section, which is recessed inward in the tire width direction and extends in the tire circumferential direction, is formed on the outer surface of the tire side section, and turbulence-generating protrusions are provided on the circumferential recessed section. In a cross-section of the tire, wherein the distance between the inner surface of the carcass body section and a rim-separation point where the inner surface comes into contact with a normal rim is defined as a tire reference thickness, and the distance between the inner surface of the folded section and the tire outer surface at the circumferential recessed section is defined as a tire thickness, the multiple turbulence-generating protrusions are provided in an area where the tire thickness is between 20% and 60% of the tire reference thickness.