Pneumatic Tire Shoulder Block Raised Portion Rut Escapeability
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Solution Overview
Problem
Pneumatic tires face challenges in improving rut performance on icy and snowy roads, as existing designs do not effectively enhance traction and escapeability from ruts.
Innovation Solution
A pneumatic tire design featuring a raised portion with a corner portion protruding from the edge of the shoulder block, which extends outward and is inclined, improving traction by biting into the rut walls and enhancing rut escapeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a raised portion is provided on the buttress portion to improve traction on snow, then traction performance is improved, but the structure complexity increases
Solution Approach 1:
The raised portion is provided only in the extension portion of the land portion at the outside in the tire width direction, creating a localized structural modification rather than a comprehensive change. This targeted approach improves traction in critical areas while minimizing overall structural complexity
Solution Approach 2:
The raised portion is divided into multiple corner portions that protrude from edge portions of the land portion. This segmentation allows each corner portion to independently contribute to traction in different directions and conditions, improving overall performance without requiring a monolithic complex structure
2Force
If corner portions protrude from the land portion edge to improve forward running force, then rut performance is improved, but the tire may become more susceptible to handle takeoff during braking
Solution Approach 1:
The corner portions are positioned asymmetrically on the front side in the rotation direction relative to the edge portion of the land portion. This asymmetric configuration optimizes the protrusion for generating forward running force while the overall symmetric arrangement of corner portions on both sides maintains balanced handling characteristics
Solution Approach 2:
The corner portions are localized structural features rather than a complete redesign of the land portion. This localized modification allows the tire to gain improved forward running force while preserving the overall structural integrity and handling stability of the tire
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 enhances traction and rut escapeability by increasing the forward running force and force escaping from ruts, while maintaining rigidity and preventing handle takeoff during braking.
Implementation Method 1
the corner portion which protrudes from an edge portion of the land portion on a front side in the rotation direction toward the front side in the rotation direction contributes to an improvement in traction property during the forward rotation
Data Source
AI summary
To provide a pneumatic tire capable of improving rut performance. A pneumatic tire according to an embodiment is a tire having a specified rotation direction. A shoulder region of a tread portion is provided with a shoulder block and a raised portion is provided in an outer extension portion of the shoulder block in a tire width direction in relation to a tire ground contact end. The raised portion includes a corner portion which protrudes from an edge portion of the shoulder block on a front side in the rotation direction toward the front side in the rotation direction.