Pneumatic Tire Narrow Groove Heat Dissipation
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Solution Overview
Problem
Conventional pneumatic tire designs that enhance heat dissipation in the tread portion by forming grooves often compromise the rigidity of the land portion, leading to deterioration in antiwear performance and steering stability.
Innovation Solution
A pneumatic tire with narrow grooves inclined relative to the tire circumferential direction, where the grooves have a width smaller than the depth, and an air inflow part on the groove walls allows for improved airflow and heat dissipation while maintaining land portion rigidity by ensuring the groove width to air inflow part depth ratio is between 1 and 15.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If grooves are formed in the tread portion to remove tread rubber and increase surface area for heat dissipation, then heat dissipation is enhanced, but the rigidity of the land portion is reduced, causing deterioration of antiwear performance and steering stability
Solution Approach 1:
The invention divides the groove structure into multiple segments: narrow grooves extending in the tire width direction, intersecting grooves, and small grooves. This segmentation allows heat dissipation through multiple pathways while maintaining land portion integrity between the grooves, resolving the contradiction between heat dissipation enhancement and rigidity maintenance.
Solution Approach 2:
The invention applies different groove configurations to different regions of the tread portion. Narrow grooves are positioned to facilitate heat dissipation in specific areas, while land portions are maintained with sufficient width and reinforcement to preserve rigidity where needed. This localized approach allows simultaneous optimization of heat dissipation and structural strength.
2Temperature
If the number of grooves is increased to improve heat dissipation effect, then temperature reduction is enhanced, but the rigidity of the land portion is reduced, causing deterioration of antiwear performance and steering stability
Solution Approach 1:
The invention implements a partial groove configuration rather than covering the entire tread surface. By strategically positioning narrow grooves, intersecting grooves, and small grooves in specific areas where heat accumulation is most severe, the invention achieves effective heat dissipation without excessively reducing land portion area, thereby maintaining antiwear performance and steering 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 design effectively enhances heat dissipation in the tread portion without compromising the rigidity of the land portion, improving antiwear performance and steering stability, particularly beneficial for large tires used in trucks and construction vehicles.
Implementation Method 1
a narrow groove formed on a tread surface, the narrow groove extending in a direction inclined with respect to the tire circumferential direction and having a groove width smaller than the groove depth, the narrow groove terminating, at least one end thereof, within the land portion, an air inflow part opening to the tread surface being formed at least one of the groove walls of the narrow groove
Data Source
AI summary
Provided is a pneumatic tire being improved in heat dissipation effect in the tread portion while being ensured in rigidity of the land portion. A narrow groove (10) is formed on a tread surface (1), the narrow groove extending in a direction inclined with respect to the tire circumferential direction and having a groove width (W1) and a groove depth (D1), the groove width (W1) being smaller than the groove depth (D1). The narrow groove (10) terminates at least one end thereof within the land portion. An air inflow part (11) is formed on at least one of the groove walls (10c) of the narrow groove (10), the groove walls facing each other in the tire circumferential direction, where the narrow groove (10) has a maximum depth (D1) and the air inflow part (11) has a maximum depth (D2), the D1 and the D2 satisfying 1≤D1/D2≤15.