Pneumatic Tire Sound-Absorbing Member Width Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pneumatic tires face challenges in reducing air column resonance caused by circumferential grooves while maintaining satisfactory wet performance, as increasing groove width improves wet performance but enhances air column resonance, and reducing groove width compromises wet performance.
Innovation Solution
A pneumatic tire design featuring a belt-shaped sound-absorbing member bonded to the tire inner surface, with a width of 70% to 95% of the tire's ground contact width, and circumferential grooves within the sound-absorbing member's region having a total width of 25% to 40% of the sound-absorbing member's width, using a double-sided adhesive tape for bonding, which effectively reduces air column resonance noise while ensuring wet performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of circumferential grooves is increased to improve wet performance, then wet performance is improved, but air column resonance is increased
Solution Approach 1:
The invention changes the physical parameters of the tire structure by introducing a sound-absorbing member with specific width ratios (70%-95% of ground contact width) and controlling groove width ratios (25%-40% of sound-absorbing member width). This parameter optimization allows the grooves to maintain sufficient width for wet performance while the sound-absorbing material absorbs the resonance energy, resolving the contradiction between groove width and air column resonance.
Solution Approach 2:
The sound-absorbing member acts as an intermediary element between the circumferential grooves and the tire cavity. It absorbs the acoustic energy generated by the grooves before it can resonate within the cavity, thereby mediating the harmful effect of air column resonance while preserving the wet performance benefits of the grooves.
2Object-generated harmful factors
If the width of circumferential grooves is reduced to decrease air column resonance, then air column resonance is reduced, but wet performance is compromised
Solution Approach 1:
The sound-absorbing member serves as a mediator that allows the grooves to be narrower than they would traditionally need to be. The sound absorption material compensates for the reduced groove width by actively absorbing resonance energy, thereby maintaining wet performance despite the narrower groove configuration.
Solution Approach 2:
The invention changes the operational parameters by introducing the sound-absorbing member, which allows the groove width parameter to be optimized for reduced resonance while the sound absorption property compensates for any potential wet performance loss from the narrower grooves.
3Object-generated harmful factors
If a sound-absorbing member is added to reduce air column resonance, then air column resonance is reduced, but device complexity increases
Solution Approach 1:
The invention uses porous sound-absorbing materials that can be integrated into the tire structure. These materials are available in various forms (foams, fibrous materials, porous rubber) that can be molded directly into tire components, adding sound absorption functionality without significantly increasing structural complexity.
Solution Approach 2:
The sound-absorbing member is designed to serve multiple functions: reducing air column resonance, potentially improving interior comfort, and working synergistically with the groove structure. This multi-functionality justifies the added component by providing multiple benefits from a single addition.
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 solution effectively suppresses air column resonance noise and maintains satisfactory wet performance by optimizing the sound-absorbing member's width and groove configuration, preventing debonding and enhancing noise reduction and durability.
Implementation Method 1
a belt-shaped sound-absorbing member being bonded via an adhesive layer to a tire inner surface in a region corresponding to the tread portion
Data Source
AI summary
A pneumatic tire of the present technology is a pneumatic tire provided with a tread portion, side wall portions and bead portions, a plurality of circumferential grooves extending in the tire circumferential direction being provided in the tread portion, and a belt-shaped sound-absorbing member being bonded via an adhesive layer to the tire inner surface in a region corresponding to the tread portion along the tire circumferential direction, wherein the width W of the sound-absorbing member is from 70% to 95% of the tire ground contact width TCW, and the total width of the circumferential grooves included in the region in the tire width direction in which the sound-absorbing member is disposed is from 25% to 40% of the width W of the sound-absorbing member.