Winter Tire Tread Grooves Balancing Traction and Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Winter tires face challenges in providing good grip and durability on snow- and ice-covered road surfaces due to decreased friction and increased stiffness at low temperatures, leading to impaired breaking, accelerating, and steering capabilities.
Innovation Solution
A tire design featuring grooves with alternating parallel and unparallel edges, enhancing traction and water drainage while maintaining durability by allowing edges to engage in multiple directions and channels for efficient water ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible tread pattern is used to improve traction on snow and ice, then driving capability is improved, but tread wear increases and durability decreases
Solution Approach 1:
The groove edges are designed with different local geometries: some edges have a first geometry optimized for water evacuation while other edges have a second geometry optimized for snow and ice traction. This allows different parts of the same groove structure to serve different functions, improving overall performance without requiring the entire tread to be flexible.
Solution Approach 2:
The groove edges feature asymmetric geometries where at least one edge differs from the opposite edge. This asymmetry enables the tread to provide both effective water channeling and enhanced grip on snow/ice surfaces, resolving the contradiction between water evacuation efficiency and traction performance while maintaining a stiffer, more durable tread structure.
2Duration of action of stationary object
If a stiffer tread pattern is used to improve durability, then tread wear decreases, but traction on snow and ice deteriorates
Solution Approach 1:
By assigning different local geometries to different groove edges, the invention enables a stiffer tread structure to achieve both durability and winter traction performance. The specialized edge geometries compensate for the reduced flexibility of the stiffer material.
Solution Approach 2:
The invention changes the geometric parameters of the groove edges rather than relying on material flexibility. By optimizing edge angles, lengths, and orientations, the stiffer tread pattern achieves effective snow and ice grip without compromising durability.
3Reliability
If grooves with unparallel edges are used to improve multi-directional traction, then steering capability is improved, but water evacuation efficiency may be compromised
Solution Approach 1:
Different groove edges are assigned different geometries: edges facing toward the center of the tire have geometries optimized for water evacuation, while edges on the outer sides have geometries optimized for snow and ice traction and steering. This local differentiation resolves the contradiction between water evacuation and steering capability.
Solution Approach 2:
The asymmetric edge geometries allow the grooves to perform multiple functions simultaneously. The asymmetry is specifically designed so that water evacuation efficiency is maintained through properly oriented edges while unparallel edges provide the multi-directional traction needed for steering on snow and ice.
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
The tire design improves traction and stability on snowy and icy roads without compromising durability, offering enhanced performance during critical maneuvers like steering, breaking, and accelerating.
Implementation Method 1
Since edges are generally used to provide increased friction between the tread and the ground, the different directions of the edges allow for traction in multiple directions
Implementation Method 2
the groove portion having substantially parallel edges provides well for the tire's capability of transporting water, especially for transporting water from the center to the sides of the tire's contact patch
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A tire for a vehicle comprising a tread is provided. The tread comprises a set of consecutive blocks (10) arranged along a circumference of the tire and a plurality of grooves (14) arranged over the circumference of the tire. Each of the plurality of grooves is arranged between two blocks of the set of consecutive blocks and each of the plurality of grooves comprises a first portion having first groove edges that are arranged substantially parallel to each other, and a second portion having second groove edges that are arranged unparallel to each other.