Variable Waveform Sipe Geometry for Tire Traction
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Solution Overview
Problem
Current tire designs lack optimal tread features that effectively enhance tire performance, particularly in terms of traction and water expulsion, due to limitations in sipe design and geometry.
Innovation Solution
A tire sipe design featuring an outer radial portion and an inner radial portion defined by specific waveforms with varying amplitudes, widths, and wavelengths, allowing for flexible and adaptive geometry that can extend into the tire tread, with waveforms such as sine or zig-zaged patterns, and depth characteristics that influence traction and water expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sipe designs are used, then manufacturing is simple, but tire traction and water expulsion performance are insufficient
Solution Approach 1:
The sipe is divided into multiple distinct portions (first portion, second portion, third portion) along its length, with each portion having different geometric characteristics including varying amplitudes, widths, and wavelengths. This segmentation allows each portion to perform optimized functions for traction and water expulsion while maintaining manufacturability through standardized formation processes.
Solution Approach 2:
Different portions of the sipe are赋予 different local geometric properties - the first portion has specific amplitude and wavelength characteristics, the second portion has different characteristics, and the third portion has yet another set of characteristics. This local quality variation optimizes performance at different locations along the sipe without requiring complete redesign of the entire sipe structure.
2Reliability
If sipe amplitude and wavelength are increased to improve traction, then water expulsion capability improves, but manufacturing precision requirements increase
Solution Approach 1:
The sipe geometry is designed with dynamic characteristics through varying amplitudes and wavelengths across different portions, allowing the sipe to adapt to different operating conditions. The waveform parameters are optimized to provide effective water expulsion and traction while remaining within manufacturable tolerances for standard tire production processes.
Solution Approach 2:
The invention systematically varies key geometric parameters (amplitude, wavelength, width) across different portions of the sipe. By carefully selecting specific ranges and relationships between these parameters, the design achieves optimal water expulsion and traction performance while maintaining compatibility with existing manufacturing capabilities and precision requirements.
3Reliability
If sipe width is increased to improve road surface interaction, then traction improves, but tire tread strength may be reduced
Solution Approach 1:
The sipe width is segmented and varied across different portions rather than maintaining a uniform width throughout. This allows wider sections to enhance road surface interaction and traction where needed, while narrower sections maintain tread structural integrity and strength. The segmented approach enables localized optimization without compromising overall tread performance.
Solution Approach 2:
Different portions of the sipe are assigned different width characteristics tailored to their specific functional requirements. Certain portions have increased width to maximize contact with road surface irregularities and improve traction, while other portions maintain smaller widths to preserve tread strength and prevent excessive flexibility that could compromise structural integrity.
Data Source
AI summary
Provided is a sipe extending into a tire tread, comprising an outer radial portion defined by a first waveform having a first amplitude, a first width, and a first wavelength, and an inner radial portion defined by a second waveform having a second amplitude, a second width, and a second wavelength. The first wavelength may be less than 5% of the length of the sipe or may be more than 100% of the length of the sipe, or the second wavelength may be less than 5% of the length of the sipe or may be more than 100% of the length of the sipe, or the second amplitude may be more than 50% of the first wavelength or may be less than 10% of the first wavelength, or the second amplitude may be more than 50% of the second wavelength or may be less than 10% of the second wavelength.