pneumatic tires

The pneumatic tire design addresses noise, wear, and performance issues by employing a tread band with varying void ratios and inclined sipes, resulting in reduced noise and improved hydroplaning and cornering.

JP2025541030APending Publication Date: 2025-12-17BRIDGESTONE EURO NV SA
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Patent Information

Application Number
JP2025536753
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2022-12-22
Publication Date
2025-12-17

AI Technical Summary

Technical Problem

Existing tires face challenges in reducing tire noise, improving wear resistance, and enhancing cornering, traction, and braking performance, particularly in the context of increasing vehicle quietness demands and the dominance of tire noise in electric vehicles.

Method used

A pneumatic tire design featuring a tread band with distinct shoulder and central regions, varying void ratios, specific groove and element configurations, and inclined transverse sipes to balance stiffness, reduce noise, and improve hydroplaning control and cornering performance.

Benefits of technology

The design achieves reduced tire noise, enhanced drainage and hydroplaning control, improved wear resistance, and balanced cornering performance by optimizing void ratios, groove configurations, and sipe orientations.

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Abstract

The pneumatic tire (1) has a tread band (2) that engages the road surface in the tread region of the tire. The tread band (2) includes two shoulder regions (10, 11) at the axially outer ends of the tread band (2), a central region (15) identified between the shoulder regions (10, 11), shoulder blocks (20A, 21A) arranged along shoulder circumferential ribs (20, 21), and central blocks (25A, 26A, 27A) arranged along central circumferential ribs (25, 26, 27). Four circumferential grooves (30, 31, 32, 33) separate the shoulder ribs (20, 21) and the central rib (25, 26, 27) from one another. In the tread region, the void ratio in the shoulder regions (10, 11) is at least 3% less than the void ratio in the central region (15).
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