Pneumatic Tire Side Projections for Heat Radiation
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Solution Overview
Problem
Existing pneumatic tires do not effectively enhance heat radiation properties beyond turbulence-induced air flow, which limits their durability and cooling efficiency.
Innovation Solution
The tire features a series of projections on its side portions with specific dimensions and spacing, creating a laminar flow over the projections and a turbulent flow between them, optimizing the velocity gradient for enhanced heat radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If projections are formed on tire side portions to create turbulence in air flow, then heat radiation property is enhanced, but the cooling efficiency is insufficient without additional techniques
Solution Approach 1:
The patent changes the geometric parameters of the projections (width, height, spacing) to control the air flow characteristics. Specifically, the width is set to 10mm or more and the spacing between projections is controlled to be 3-10 times the projection height, which optimizes the velocity gradient and maintains laminar flow for effective heat radiation without requiring additional cooling techniques
2Temperature
If the width of projections is increased to ensure heat radiation area, then heat radiation efficiency is improved, but the velocity gradient may be reduced
Solution Approach 1:
The patent optimizes the projection width parameter to be 10mm or more, which provides sufficient heat radiation area while maintaining an appropriate velocity gradient. This parameter setting balances the competing requirements of large heat radiation area and adequate velocity gradient for effective air cooling
3Area of stationary object
If the interval between projections is decreased to increase cooling coverage, then more surface area is cooled, but laminar flow cannot be maintained
Solution Approach 1:
The patent sets the interval between projections to be 3-10 times the projection height, which maintains sufficient spacing to preserve laminar flow stability while ensuring adequate cooling coverage. This parameter range optimizes the balance between cooling area and flow regime stability
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 significantly enhances heat radiation efficiency, improving tire durability by promoting effective air cooling through both laminar and turbulent flows.
Implementation Method 1
an air flow which flows on the top surface of the projection formed on the surface of the tire side portion becomes a laminar flow
Implementation Method 2
a velocity gradient of an air flow in the vicinity of the surface of the tire side portion is increased
Implementation Method 3
heat radiation due to air cooling of the top surface of the projection can be effectively promoted
Implementation Method 4
an air flow between the projections becomes a turbulent flow
Data Source
AI summary
A pneumatic tire includes a plurality of projections formed on a surface of a tire side portion at an interval in a tire circumferential direction. A thickness of the projection is smaller than a width of a top surface of the projection in a tire circumferential direction. The thickness is a distance from the surface of the tire side portion to the top surface of the projection. The width of the projection is 10 mm or more. The interval of the projections is 3 times or more and 10 times or less as large as the thickness of the projection.