Pneumatic Tire Tread Groove Segmentation for Dry Stability and Snow Traction
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Solution Overview
Problem
Pneumatic tires designed for snowy roads often compromise on driving stability and wear resistance on dry surfaces due to soft tread rubber and inadequate block rigidity, making them unsatisfactory for dual-purpose use.
Innovation Solution
A pneumatic tire design featuring a tread with first, second, and third main grooves, inclined grooves communicating with multiple lug grooves, and specific land section width and surface area ratios to optimize block rigidity and improve stability on dry surfaces while maintaining performance on snow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple main grooves and lug grooves are provided to increase groove area for snow performance, then running performance on snow is improved, but block rigidity becomes insufficient and driving stability on dry road surfaces deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the tread into multiple land sections (first, second, third, and fourth land sections) with different groove patterns and block configurations. The first and second land sections have inclined grooves for snow performance, while the third and fourth land sections have different groove arrangements for dry road stability, allowing each region to optimize for its specific function.
Solution Approach 2:
The tread is segmented into multiple distinct land sections separated by main grooves and lug grooves. Each land section contains specific block patterns and groove configurations, creating independent functional zones that can be optimized for different road conditions without compromising overall tire performance.
2Adaptability or versatility
If soft tread rubber is used to improve running performance on snow, then traction on snow is enhanced, but wear resistance on dry road surfaces deteriorates
Solution Approach 1:
Different land sections utilize the soft tread rubber property selectively. The first and second land sections with inclined grooves benefit from the soft rubber for snow traction, while the third and fourth land sections with different groove patterns maintain wear resistance on dry surfaces, achieving localized optimization of material properties.
3Adaptability or versatility
If groove area is increased to improve snow performance, then running performance on snow is enhanced, but driving stability on dry road surfaces deteriorates
Solution Approach 1:
The groove system is segmented into different configurations across multiple land sections. The first and second land sections have inclined grooves that provide snow performance, while the third and fourth land sections have different groove patterns that maintain larger block areas for dry road stability, balancing groove area distribution for dual-condition performance.
Data Source
AI summary
A pneumatic tire having improved driving stability and wear resistance on dry road surfaces and improved running performance on snow. The pneumatic tire includes a tread portion provided with first, second and third main grooves extending in a tire circumferential direction and a plurality of lug grooves each extending from one shoulder side to the other shoulder side. A width of a first land section defined between the first and second main grooves is set greater than a width of a second land section defined between the first and third main grooves, a plurality of inclined grooves are provided in the first land section, where each inclined groove communicates with at least three of the lug grooves while being inclined to the tire circumferential direction, and one end of each inclined groove is open to one of the lug grooves while the other end thereof is terminated within a block.