Motorcycle Tire Variable Incision Angles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Motorbike tires lack optimal handling and feedback control, particularly in terms of handlebar feedback, which is crucial for motorcyclists, especially at high speeds and during cornering, due to fixed tire architectures and rubber compound properties.
Innovation Solution
A motorbike tire design featuring inclined incisions on the tread, where the angle of the incision walls varies between 5° to 45° in different circumferential planes, allowing for adaptive handlebar feedback based on the tire's position and camber angle, achieved through the combination of incision orientation, tire shape, and polymer compound selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed tire architectures and rubber compound properties are used, then manufacturing simplicity is maintained, but handlebar feedback control and handling performance deteriorate
Solution Approach 1:
The tire architecture is segmented into multiple working crown layers with different orientations (first layer at 20-40 degrees, second layer at 40-60 degrees) and optional third layer for stability. This segmentation allows each layer to contribute differently to handling characteristics, enabling optimized handlebar feedback control through layered structural complexity.
Solution Approach 2:
Different regions of the tire are assigned different properties: the working crown layers have specific angle ranges optimized for grip and feedback, while the stability layer provides consistent circumferential support. The rubber compounds are also differentiated across regions to optimize local handling characteristics and wear properties.
2Ease of operation
If single-layer crown reinforcement is used, then device complexity is reduced, but grip and handling performance deteriorate
Solution Approach 1:
The crown reinforcement is divided into multiple working layers with distinct angle ranges. The first working crown layer (20-40 degrees) and second working crown layer (40-60 degrees) are segmented to provide different grip characteristics, with each layer contributing to overall grip performance through its specific orientation.
Solution Approach 2:
The tire employs composite reinforcement structures combining different material orientations and properties across multiple layers. The working crown layers use cord reinforcements at specific angles, potentially combined with rubber compounds of varying properties to create a composite structure that optimizes both grip and durability.
3Ease of operation
If variable inclination incisions are added to optimize handling, then handlebar feedback control improves, but manufacturing precision requirements increase
Solution Approach 1:
The incision pattern is segmented into multiple circumferential rows with different inclination angles. First circumferential rows have inclinations of 5-20 degrees while second circumferential rows have inclinations of 20-45 degrees. This segmentation allows the tire to provide varied feedback characteristics across different operating conditions while maintaining manufacturability through standardized angle ranges.
Solution Approach 2:
The incision geometry parameters are systematically varied across different circumferential positions. By changing the inclination angle parameter from 5-20 degrees in first rows to 20-45 degrees in second rows, the tire optimizes handlebar feedback for different camber angles and riding conditions while maintaining consistent manufacturing tolerances within each category.
4Reliability
If multiple working crown layers with crossed orientations are used, then grip and wear resistance improve, but device complexity increases
Solution Approach 1:
The crown reinforcement is segmented into multiple working layers with crossed orientations. The first working crown layer uses cords at 20-40 degrees while the second working crown layer uses cords at 40-60 degrees. This segmentation provides enhanced wear resistance through layered protection while each layer contributes to grip through its specific angle optimization.
Solution Approach 2:
The tire employs composite crown reinforcement structures combining multiple layers of cord reinforcements at different angles. These composite layers work together to provide both wear resistance through layered protection and optimized grip through varying orientations, creating a multi-functional reinforcement system.
Data Source
AI summary
A tire for a motorized two wheeled vehicle comprising a reinforcing structure of the carcass type, made up of reinforcing elements, anchored on each side of the tire to a bead the base of which is intended to be mounted on a rim seat, each bead being extended radially outwards by a sidewall, the sidewalls radially towards the outside joining to a tread. The tread comprises at least one incision and in a circumferential plane, at least part of one wall of the at least one incision forms with the radial direction an angle of between 5 and 45°, and the angle formed between at least one part of one wall of the at least one incision and the radial direction in a first circumferential plane is different from the angle formed between at least one part of one wall of the at least one incision and the radial direction in at least one second circumferential plane.