Pneumatic Tire Tread Pattern Heat Dissipation Segmentation
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Solution Overview
Problem
Heavy duty pneumatic tires face reduced heat build-up resistance due to large tread center region land portions, which increase heat build-up and decrease heat dissipation.
Innovation Solution
A tread pattern with center lug grooves, shoulder lug grooves, circumferential main grooves, and a circumferential secondary groove is designed, featuring specific geometries and orientations to enhance heat dissipation and tread rigidity, including groove turning portions, raised bottom portions, and optimized dimensions to improve heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the tread center region land portion area is made large to increase cut resistance and wear resistance, then wear resistance is improved, but heat build-up resistance is reduced
Solution Approach 1:
The tread center region land portion is divided into multiple segments by introducing center lug grooves that extend in the tire width direction. These grooves partition the large continuous land portion into smaller discrete regions, increasing the surface area for heat dissipation while preserving the overall structural integrity and wear resistance of the tread center region.
Solution Approach 2:
The groove depth is varied in different regions: the center lug grooves have a first groove depth in the tread center region and a second groove depth (greater than the first) in the shoulder region. This local variation optimizes heat dissipation in the high-heat tread center while maintaining adequate traction and structural support in the shoulder regions.
2Temperature
If the groove area is increased to enhance heat dissipation, then heat build-up resistance is improved, but tread rigidity may be reduced
Solution Approach 1:
The center lug grooves have different groove depths in different regions: a first groove depth in the tread center region and a second groove depth (greater than the first) in the shoulder region. This local differentiation allows optimized heat dissipation where needed while preserving tread rigidity in critical load-bearing areas.
Solution Approach 2:
The groove turning portions are designed with bent or curved shapes rather than sharp angles, creating a gradual transition that maintains structural continuity and rigidity while still providing effective heat dissipation pathways through the groove system.
Data Source
AI summary
A pneumatic tire includes a plurality of center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; a plurality of shoulder lug grooves disposed in the intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire with a wave-like shape.