Pneumatic Tyre Profile Rib Frame-Like Groove Noise Stability
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Solution Overview
Problem
Pneumatic vehicle tires with profile ribs on their shoulders face challenges in achieving low rolling noise, good water drainage, and maintaining stability for improved handling on dry and wet roads, as existing designs either compromise on noise or stability.
Innovation Solution
The design features at least three transverse grooves in a circumferential direction forming a transverse groove group, with outermost grooves connected by additional grooves running laterally, forming a frame-like structure, which stabilizes the profile rib and enhances drainage, thereby improving handling properties while minimizing rolling noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a large number of narrow transverse grooves are formed in the profile rib to reduce rolling noise, then rolling noise is reduced, but the stability of the profile rib deteriorates
Solution Approach 1:
The profile rib is segmented by forming multiple narrow transverse grooves that extend in the axial direction. These grooves divide the profile rib into multiple sections, reducing the negative volume and enabling low rolling noise while maintaining structural integrity through the segmented design
Solution Approach 2:
The transverse grooves are arranged in a specific pitch sequence along the circumferential direction, creating a dimensional pattern that optimizes noise reduction. The grooves extend from the outer surface toward the inner surface, utilizing the axial dimension to achieve the desired acoustic performance
2Object-generated harmful factors
If the number of transverse grooves is increased to reduce rolling noise, then rolling noise is reduced, but handling properties on dry and wet roads deteriorate
Solution Approach 1:
The grooves are pre-formed with optimized dimensions and spacing during tire manufacturing. The pitch sequence and distribution of grooves are carefully designed in advance to achieve the desired balance between noise reduction and handling performance, preventing the need for post-manufacturing adjustments
Data Source
Figure 1
Figure 2~3
AI summary
Pneumatic vehicle tyres comprising a tread which has a profile rib (1), on at least one tyre shoulder, running in the circumferential direction and delimited on the tread inner side by a circumferential groove (2), and in which transverse grooves (3) are formed, extending in the axial direction, executed as incisions and running parallel to one another, which transverse grooves run on the tread outer side past the ground contact area width and stop on the tread inner side at a distance (b) from the circumferential groove (2) delimiting the profile rib (1). Each at least three transverse grooves (3) following one another in the circumferential direction form a transverse groove group, in which the ends of the respective outermost transverse grooves (3) are connected to additional grooves (7a, 7b), which run in the circumferential direction laterally in relation to the inner transverse grooves (3) running between the outermost transverse grooves (3), to form frame-like grooves (3, 7a, 7b), wherein the additional grooves (7a, 7b) have a width (b2) of 0.5 mm to 2.0 mm and a depth of 1.0 mm to 3.0 mm.