Tire
By optimizing the rubber distribution in the tire structure, the contradiction between low rolling resistance and ride comfort in passenger car tires has been resolved, achieving the effect of reducing the longitudinal elastic coefficient and rolling resistance.
CN115996855BActive Publication Date: 2025-12-05THE YOKOHAMA RUBBER CO LTD
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Patent Information
- Application Number
- CN202180046133.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-09-07
- Filing Date
- 2021-06-17
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2041-06-17
AI Technical Summary
Technical Problem
While improving low rolling resistance, existing passenger car tires often fail to provide adequate ride comfort.
Method used
Design a tire structure including a pair of bead cores, a carcass layer, a belt layer, tread rubber, sidewall rubber, and rim cushioning rubber, satisfying specific geometric relationship conditions, such as GE/GD and GF/GD within a certain range, reducing the rubber volume of the bead portion and optimizing the rubber distribution.
Benefits of technology
By optimizing the rubber distribution, the longitudinal elastic coefficient of the tire is reduced, improving ride comfort and suppressing heat generation in the bead area, thus reducing rolling resistance.
✦ Generated by Eureka AI based on patent content.
Abstract
In this tire (1), the tire body layer (13) covers the bead core (11) and is rolled back to the outside in the tire width direction. Furthermore, the distance (GD) from the tire face profile at the position of the maximum width of the tire (D) to the inner surface of the tire, the distance (GE) from the tire face profile at the position of 30[%] of the tire section height (SH) to the inner surface of the tire, and the distance (GF) from the tire face profile at the self-contact start point (F) of the rolled back portion (312) of the tire body layer (13) to the inner surface of the tire satisfy the conditions of GE ≤ GF, 1.00 ≤ GE / GD ≤ 1.10, and 1.00 ≤ GF / GD ≤ 1.40.
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