Pneumatic Tire Side Protector Segmentation for Off-Road Grip
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Solution Overview
Problem
Existing pneumatic tires face challenges in enhancing off-road performance while maintaining cut-resistant performance of the sidewall portion.
Innovation Solution
The tire design incorporates side protectors with grooves, cut-out portions, and sipes that moderate the rigidity of the side protectors, allowing for increased deformation and mud capture, enhancing off-road performance while maintaining high cut-resistant performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the side protector is made rigid to maintain cut-resistant performance, then cut resistance is improved, but off-road performance and envelope characteristics deteriorate
Solution Approach 1:
The side protector is divided into multiple segments by introducing grooves, cut-out portions, and sipes. These divisions create flexible zones that allow the side protector to deform and adapt to off-road conditions while the remaining solid portions maintain cut-resistant strength. The segmentation enables the structure to bend and conform to terrain without compromising overall integrity.
Solution Approach 2:
Different regions of the side protector are given different properties through the groove pattern design. Areas with grooves and cut-out portions have reduced rigidity for flexibility and mud ejection, while areas between these features maintain higher rigidity for cut resistance. This local variation in quality allows simultaneous optimization of both adaptability and strength.
2Strength
If the side protector rigidity is increased to improve cut resistance, then strength is improved, but envelope characteristics and mud capture ability deteriorate
Solution Approach 1:
The side protector transitions from a static rigid structure to a dynamic structure that can change shape during operation. The grooves and cut-out portions enable the side protector to deform dynamically in response to terrain variations, improving envelope characteristics and mud capture ability while maintaining sufficient rigidity for cut resistance through the remaining solid portions.
3Adaptability or versatility
If grooves are added to improve mud capture and off-road performance, then off-road performance is improved, but side protector volume decreases
Solution Approach 1:
The side protector incorporates a porous-like structure through grooves, cut-out portions, and sipes. This porous configuration increases surface area and improves mud capture ability and off-road performance while the strategic placement and dimensions of these features minimize the overall volume reduction. The porous structure allows the side protector to interact more effectively with mud and terrain.
Data Source
AI summary
A pneumatic tire includes a tread portion and a pair of sidewall portions each extending inwardly in a tire radial direction from the tread portion. At least one of the pair of the sidewall portions is provided with at least one side protector protruding outwardly in a tire axial direction. The side protector is provided with a groove, a cut-out portion connected with the groove, and a sipe connected with the groove.