Pneumatic Tire Zigzag Grooves Snow Shearing Force
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Solution Overview
Problem
Current pneumatic tires do not achieve optimal on-snow performance, as they lack effective designs for generating sufficient snow-shearing force and traction.
Innovation Solution
The tire features a tread portion with zigzag outboard shoulder and middle main grooves, connecting lateral and lug grooves that form continuous snow columns, enhancing snow-shearing force and traction by promoting snow discharge during cornering and straight travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If lateral grooves and lug grooves with large groove volume are provided to improve on-snow performance, then snow-shearing force is increased, but the overall on-snow performance is still insufficient
Solution Approach 1:
The tread portion is segmented into multiple functional regions (outboard shoulder region, outboard middle region, inboard middle region, inboard shoulder region) with different groove configurations. Each region has specifically designed grooves (shoulder main groove, middle main groove, lateral grooves, lug grooves) that work together to generate snow-shearing force while maintaining overall performance balance
Solution Approach 2:
Different regions of the tread are given different groove characteristics optimized for their specific functions. The outboard shoulder region has grooves optimized for cornering and lateral forces, while the inboard shoulder region has grooves optimized for straight-line traction. This local optimization ensures each area contributes maximally to overall on-snow performance
2Force
If continuous grooves are provided to generate snow-shearing force, then traction on snow is improved, but groove configuration complexity increases
Solution Approach 1:
The tread pattern employs asymmetric groove configurations where the outboard shoulder region has different groove arrangements compared to the inboard shoulder region. This asymmetry allows optimization for directional forces (cornering vs. straight-line travel) while maintaining a manageable overall design through clear regional differentiation
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 design significantly improves on-snow performance by generating large snow-shearing force and maintaining traction and braking capabilities on snowy surfaces.
Implementation Method 1
a pneumatic tire including a tread portion provided with lateral grooves and lug grooves with a large groove volume... Such a tire may exert large snow-shearing force by the lateral grooves and lug grooves
Data Source
AI summary
Provided is a pneumatic tire having high snow road performance. Provided is a pneumatic tire, the direction of mounting of which to a vehicle is specified. A tread section has formed therein an outer shoulder main groove which extends in a zigzag pattern, an outer middle main groove, outer shoulder lateral grooves, and outer middle lateral grooves. As a result, outer shoulder lands and outer middle lands are formed on the tread section. The outer shoulder lands are provided with outer shoulder lug grooves, and the outer middle lands are provided with outer middle lug grooves. The outer shoulder lateral grooves and the outer middle lug grooves are smoothly connected through the outer shoulder main groove. The outer middle lateral grooves and the outer shoulder lug grooves are smoothly connected through the outer shoulder main groove.