Heavy Vehicle Tire Tread Groove Design for Thermal Management
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Solution Overview
Problem
Heavy-duty vehicle tires for civil engineering applications face high temperatures in the crown area due to harsh running conditions, leading to degradation and reduced endurance.
Innovation Solution
The tire tread design features circumferential grooves with specific dimensions and spacing to enhance cooling and ventilation, positioned to align with hotspots and maintain sufficient wearable material volume, combined with transverse sipes and grooves to manage load distribution and improve grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the tread design includes deep and wide circumferential grooves to improve cooling, then the crown temperature is reduced, but the mechanical strength and load-bearing capacity of the tread are compromised
Solution Approach 1:
The patent applies parameter changes by precisely controlling the dimensions of circumferential grooves (axial width W between 5-15mm, radial depth H between 30-80% of tread thickness, and spacing C between 80-150mm) to optimize the balance between cooling efficiency and structural strength. This quantitative parameter optimization allows the grooves to provide sufficient cooling while maintaining adequate tread strength for heavy loads
Solution Approach 2:
The patent implements local quality by positioning circumferential grooves at specific axial distances from the equatorial plane (L between 20-40mm) to align with thermal hotspot locations. This targeted placement ensures cooling is applied where heat generation is highest, maximizing cooling efficiency while minimizing the total groove volume that would compromise overall tread strength
2Duration of action of stationary object
If circumferential grooves are positioned to align with thermal hotspots for optimal cooling, then the thermal endurance is improved, but the grip performance and load distribution are affected
Solution Approach 1:
The patent uses parameter changes by optimizing the axial position of circumferential grooves (at distances L between 20-40mm from the equatorial plane) to align with thermal hotspot locations while maintaining adequate tread material between grooves for proper load distribution and grip. This precise positioning ensures thermal endurance is improved without compromising reliability
Solution Approach 2:
The patent applies partial action by implementing circumferential grooves with moderate dimensions (axial width 5-15mm, spacing 80-150mm) that provide sufficient cooling alignment with hotspots while leaving adequate tread material remaining to maintain grip performance and load distribution under various operating conditions
3Temperature
If the tread material volume is reduced to allow larger cooling grooves, then the cooling efficiency increases, but the wear resistance and service life are reduced
Solution Approach 1:
The patent applies parameter changes by precisely controlling the radial depth H of circumferential grooves to be between 30-80% of the tread thickness, and the axial width W between 5-15mm. This optimization ensures sufficient cooling efficiency while preserving adequate wearable material volume (maintaining at least 20-40mm of tread material between grooves) to ensure wear resistance and extended service life under heavy loads
Solution Approach 2:
The patent uses partial action by implementing circumferential grooves with moderate dimensions that provide adequate cooling without excessive material removal. The groove spacing C is maintained between 80-150mm to ensure cooling effectiveness while preserving sufficient tread material volume for acceptable wear resistance and service life
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 design effectively reduces crown temperatures, enhances thermal endurance, and maintains mechanical strength and grip performance under heavy loads and uneven terrain.
Implementation Method 1
The tread design features circumferential grooves with specific dimensions and spacing to enhance cooling and ventilation
Implementation Method 2
In order to ensure satisfactory performance in terms of longitudinal grip, in traction and braking, and transverse grip
Data Source
AI summary
Tread of a tire (1) for a heavy-duty vehicle of civil engineering type. The tread (2), having an axial width WT and having a radial thickness HT at least equal to 70 mm, comprises at least two circumferential grooves (3) positioned axially on each side of an equatorial plane (XZ). Each circumferential groove (3) has an axial width W and a radial depth H, such that the ratio W/H is at least equal to 0.06, the axial distance C between two consecutive circumferential grooves (3) is at least equal to 12% and at most equal to 21% of the axial width WT of the tread and each of the axially outermost circumferential grooves (3) is positioned axially, with respect to the equatorial plane XZ, at an axial distance LE at least equal to 35% of the axial width WT of the tread.