Pneumatic Tire Side Block Segmentation for Mud and Rock Traction
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Solution Overview
Problem
Existing pneumatic tires face challenges in providing both excellent mud performance and rock performance on unpaved roads, as current designs often compromise between the two, failing to balance traction and stability across varying road conditions.
Innovation Solution
A pneumatic tire design featuring a tread portion with a segmented side block arrangement, where the number and size of side blocks differ between inner and outer regions to enhance both mud and rock performance, with the inner side blocks being more numerous and smaller, and outer side blocks being fewer but larger, ensuring balanced traction and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pattern with a large number of groove components and small block volume is used to enhance mud performance, then traction in mud is improved, but block rigidity decreases and rock performance deteriorates
Solution Approach 1:
The patent applies local quality by creating different block configurations in different regions of the tread. Specifically, the inner side region (vehicle inner side) has a higher density of groove components and smaller block volume to enhance mud performance, while the outer side region (vehicle outer side) has larger block volume and fewer groove components to maintain block rigidity for rock performance. This regional differentiation allows each area to optimize for its specific function.
Solution Approach 2:
The patent segments the tread pattern into distinct inner side and outer side regions with different block characteristics. The side blocks are divided into an inner side block group and an outer side block group, with the inner side blocks having smaller dimensions and higher segmentation density compared to the larger, less segmented outer side blocks. This segmentation strategy enables simultaneous optimization for both mud and rock conditions.
2Reliability
If a pattern with high block rigidity and large block volume is used to enhance rock performance, then traction on rocky ground is improved, but groove volume decreases and mud performance deteriorates
Solution Approach 1:
The patent implements local quality by assigning different block characteristics to different lateral regions of the tread. The outer side region features larger block volume and higher rigidity to handle rocky ground effectively, while the inner side region incorporates more groove volume and smaller blocks to maintain mud performance. This spatial differentiation resolves the contradiction between rock and mud performance requirements.
Solution Approach 2:
The patent segments the tread into functionally distinct zones with the outer side blocks optimized for rock contact and the inner side blocks optimized for mud engagement. The segmentation allows the outer region to provide structural rigidity for rock performance while the inner region provides sufficient groove volume for mud evacuation and traction.
3Reliability
If the number of side blocks is increased to improve mud performance, then traction in mud is enhanced, but individual block size decreases and rock performance suffers
Solution Approach 1:
The patent applies local quality by varying the number and size of side blocks across different lateral regions. The inner side region contains a greater number of smaller side blocks to maximize groove volume and mud performance, while the outer side region contains fewer but larger side blocks to maintain individual block size for rock performance. This graduated variation in block characteristics resolves the contradiction between quantity and size requirements.
Data Source
AI summary
A pneumatic tire includes a plurality of side blocks rising from an outer surface of a sidewall portion and defined by a segmentation element in each of side regions adjacent to an outer side in a tire width direction of an outermost end portion in the tire width direction of a tread portion. The number Nout of the side blocks provided in an outer side region that is an outer side with respect to a vehicle when a tire is mounted on the vehicle is smaller than the number Nin of the side blocks provided in an inner side region that is an inner side with respect to the vehicle when the tire is mounted on the vehicle.