Pneumatic Tire Side Projections for Heat Radiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pneumatic tire technologies do not effectively enhance heat radiation properties beyond turbulence creation in air flow, which limits tire durability.
Innovation Solution
A pneumatic tire design featuring projections on the tire side portions with inclined edge portions that promote a laminar flow boundary layer, enhancing heat radiation efficiency by dividing air flows into main and sub-flows, with tip end angles of 100° or less to ensure effective heat radiation without rotational direction limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If projections are designed to create turbulence in air flow, then heat radiation property is enhanced, but the velocity gradient in the boundary layer is reduced
Solution Approach 1:
The patent changes the geometric parameters of the projections, specifically setting the tip end angles to 100° or less and inclining the side edge portions, to control the air flow characteristics and maintain high velocity gradient in the boundary layer for effective heat radiation
2Temperature
If the projection shape is optimized for laminar flow, then heat radiation efficiency is improved, but the tire rotational direction becomes limited
Solution Approach 1:
The patent applies asymmetry by inclining the side edge portions of the projections relative to the tire radial direction, which allows the projection shape to effectively guide air flow for laminar boundary layer formation while maintaining functionality regardless of rotation direction
Solution Approach 2:
The projection design achieves multi-functionality by simultaneously providing heat radiation enhancement through laminar flow control and rotational direction independence, making the tire applicable in various mounting configurations
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 design effectively enhances heat radiation through laminar flow on the tire surface, improving tire durability by optimizing the velocity gradient and boundary layer formation, while maintaining flexibility in rotational direction.
Implementation Method 1
a main air flow which flows on the top surface of the projection forms 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 efficiency from the object to the fluid is high, and have completed the present invention based on such finding
Implementation Method 4
heat radiation due to air cooling of the top surface of the projection can be effectively promoted
Data Source
AI summary
A pneumatic tire includes a projection formed on a surface of a tire side portion. The projection includes a top surface, and first and second side surfaces respectively forming a side surface in a tire circumferential direction. A first side edge portion, where the top and first side surfaces intersect, has an inclination to a tire radial direction viewed in a tire width direction. A second side edge portion, where the top and second side surfaces intersect, has an inclination to the tire radial direction as viewed in the tire width direction. A first tip end angle made by the top surface and the first side surface on the first side edge portion, and a second tip end angle made by the top surface and the second side surface on the second side edge portion are 100° or less. The rotational direction of the pneumatic tire is not designated.