Tyre Tread Wavy Groove Layout for Traction and Low Noise
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Solution Overview
Problem
All-terrain tires face a trade-off between optimizing traction on soft surfaces like mud or sand and maintaining noise reduction and dry road performance, with existing designs compromising on pattern rigidity and steering stability.
Innovation Solution
The tire features a tread pattern with circumferential and axial grooves, including wavy grooves that extend inwardly into blocks, providing improved traction and stiffness while reducing noise and enhancing wet and dry performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If circumferential grooves are provided on the tread to improve wet performance and reduce noise, then noise reduction and wet performance are improved, but traction on soft surfaces deteriorates due to reduced pattern rigidity
Solution Approach 1:
The patent applies different groove depths to different circumferential groove positions. The first circumferential groove has a first depth while the second circumferential groove has a second depth that is different from the first depth. This local variation in groove depth allows different regions of the tread to serve different functions - some regions optimized for noise reduction and wet performance, others for maintaining traction on soft surfaces.
2Reliability
If deep grooves are provided to improve mud and sand traction, then traction on soft surfaces is improved, but noise increases due to air column resonance
Solution Approach 1:
The patent implements circumferential grooves with varying depths at different positions around the tread circumference. This local differentiation allows certain groove sections to be deeper for enhanced mud/sand traction while other sections are optimized for noise reduction, resolving the contradiction between traction and noise performance.
3Reliability
If transverse grooves are added to improve traction on soft surfaces, then traction is improved, but steering stability deteriorates due to reduced pattern rigidity
Solution Approach 1:
The patent varies the depth of circumferential grooves locally around the tread, creating zones with different rigidity characteristics. This allows the tread pattern to maintain sufficient overall rigidity for steering stability while providing localized areas with enhanced traction capabilities on soft surfaces.
Data Source
AI summary
It is provided a pneumatic tyre, the tyre having a circumferential direction, an axial direction and an equatorial plane, and the tyre comprising: a tread extending in a tyre circumferential direction, said tread comprising at least one circumferential groove running continuously in the circumferential direction, and a plurality of axial grooves or transverse grooves running at an angle to the axial direction, and a plurality of blocks defined by the circumferential groove and the axial grooves or transverse grooves, said blocks extending radially between an inner surface of the tread and a tread surface to come into contact with the ground, wherein at least some of the blocks comprise at least one wavy groove that extends from a circumferential groove inwardly into the block, and wherein the wavy groove has a depth extending radially from the tread surface to come into contact with the ground towards the inner surface that ends above the inner surface (26) of the tread.