Tire Sidewall Layout for Embedded Communication Device Durability
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Solution Overview
Problem
Conventional tires face challenges in achieving both effective communication performance and durability for embedded communication devices due to the rubber member's location on the outer side in the tire width direction.
Innovation Solution
A tire design featuring a pair of bead cores with a carcass ply, a first rubber member on the outer side in the tire radial direction sandwiched between the body and turn-up portions, and a high-hardness rubber member on the outer side in the tire width direction, with the communication device embedded on the inner side of the tire radial direction and outer side of the high-hardness rubber member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication device is embedded in the bead portion reinforced with reinforcement ply, then durability of the communication device is improved, but communication performance deteriorates due to the rubber member on the outer side in tire width direction
Solution Approach 1:
The patent positions the communication device at the intersection of two dimensional constraints: radially inner side of the tire maximum width position and width-direction outer side of the high-hardness rubber member. This spatial repositioning in multiple dimensions allows the device to simultaneously achieve durability through reinforcement ply embedding and communication performance by avoiding interference from outer rubber members.
Solution Approach 2:
The patent introduces a high-hardness rubber member with specific properties (higher hardness than side rubber) placed at the width-direction outer side of the first rubber member. This creates a localized protective zone with different material properties that shields the communication device while maintaining overall tire flexibility and communication performance.
2Loss of information
If the first rubber member height is reduced to improve communication performance, then communication performance is improved, but durability and structural support may deteriorate
Solution Approach 1:
The patent specifies that the height of the first rubber member in the tire radial direction should be 15% or less of the tire cross-sectional height. This parameter optimization reduces the volume of rubber material that could interfere with communication signals while maintaining sufficient structural support through the carcass ply and bead core configuration.
Solution Approach 2:
The patent employs a composite structure combining the first rubber member with a high-hardness rubber member (having higher hardness than side rubber). This composite arrangement provides both the low-interference communication zone required for signal transmission and the structural durability needed for tire performance.
Data Source
AI summary
A tire 1 wherein a height in the tire radial direction of the first rubber member 10 is 15% or less of a tire cross-sectional height; and a high-hardness rubber member (11A, 11B) that has a higher hardness than side rubber 9 and that is arranged on an outer side in a tire width direction of the first rubber member 10, wherein a communication device 12 is embedded in a position in the tire radial direction that is located on an inner side in the tire radial direction of a tire maximum width position SWH and on the outer side in the tire radial direction of the high-hardness rubber member.