Two-wheeled Vehicle Tire Tread Block Inclination
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Solution Overview
Problem
Conventional two-wheeled vehicle tires with tread blocks exhibit poor grip performance on hard terrain despite improved grip on soft terrain.
Innovation Solution
A two-wheeled vehicle tire design featuring a tread portion with three types of blocks, each with distinct trailing edge inclinations, distributed across crown, middle, and shoulder regions, optimizing block percentages and dimensions for balanced grip on both hard and soft terrains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple types of blocks with different trailing edge inclinations are provided, then grip performance on both hard and soft terrain is improved, but device complexity increases
Solution Approach 1:
The patent changes the geometric parameters of the tread blocks, specifically the trailing edge inclination angles. Three types of blocks are defined with different inclination angles: first blocks with smaller angles for hard terrain, and second and third blocks with larger angles for soft terrain. By varying this single geometric parameter while maintaining the basic block structure, the patent achieves multi-terrain performance without excessive complexity.
Data Source
AI summary
A two-wheeled vehicle tire includes a tread portion having a designated rotational direction and being provided with at least three kinds of blocks including first blocks each having a trailing edge extending substantially in parallel with a tire axial direction, second blocks each having a trailing edge inclined a first direction with respect to the tire axial direction and third blocks each having a trailing edge inclined in a second direction opposite to the first direction with respect to the tire axial direction. At least two different kinds of blocks selected from a group of the first blocks, the second blocks and the third blocks are provided on each of a crown region, middle regions and shoulder regions of a tread portion.