Pneumatic Tire Tread Incision Structure for Dry Braking Stiffness
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Solution Overview
Problem
Existing vehicle pneumatic tires suffer from reduced braking performance on dry roads due to the stiffness reduction caused by channel-shaped, radially inner cut sections in the tread, which concentrate stresses and shear forces, leading to increased deformation under load.
Innovation Solution
The implementation of a continuously arc-shaped central incision section in the tire tread, with a width at least 0.2 mm narrower than the radially outer section, provides enhanced support effects and increased stiffness of the profile blocks, particularly under braking conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If channel-shaped radially inner cut sections are implemented in the tread, then water and snow absorption capacity is improved, but stiffness of the profile blocks is reduced
Solution Approach 1:
The patent applies local quality by differentiating the width of the incision across different radial sections. The radially outer section maintains a narrower width (0.6-2.0 mm) to preserve stiffness, while the radially inner section widens to channel-shaped (150%-400% of outer width) to enhance water and snow absorption. This localized variation in geometric properties allows each section to fulfill its specific functional requirement independently.
Solution Approach 2:
The incision is segmented into distinct radial sections (outer, middle, inner) with different geometric characteristics. The channel-shaped radially inner section is separated from the narrower outer section by intermediate sections, allowing independent optimization of each segment's function - the inner section for fluid absorption and the outer section for structural stiffness.
2Object-generated harmful factors
If channel-shaped radially inner cut sections are implemented in the tread, then traction is improved, but deformation under load increases
Solution Approach 1:
The patent implements local quality by varying the incision width along the radial direction. The radially outer section maintains narrow dimensions (0.6-2.0 mm) to preserve profile block stiffness and reduce deformation under load, while the radially inner section expands to channel-shaped (150%-400% wider) to enhance traction through improved water and snow absorption capacity.
Solution Approach 2:
The incision structure is divided into multiple radial segments with distinct geometric properties. The segmentation allows the outer sections to provide structural stability while the inner channel-shaped section provides traction enhancement, with intermediate sections transitioning between these functional zones.
3Strength
If continuously arc-shaped central incision section with reduced width is implemented, then stiffness of profile blocks is improved, but water and snow absorption capacity may be reduced
Solution Approach 1:
The patent segments the incision into radial sections where the continuously arc-shaped central section (forming a bulge) has reduced width (at least 0.2 mm narrower than outer section) to maintain stiffness, while the radially inner channel-shaped section maintains wider dimensions (150%-400% of outer width) to ensure adequate water and snow absorption capacity.
Solution Approach 2:
The patent applies local quality by positioning the continuously arc-shaped central section with reduced width in specific radial zones where stiffness is critical, while maintaining wider channel-shaped sections in radial zones where water and snow absorption is most important, thus locally optimizing each section's contribution to overall performance.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a vehicle pneumatic tire with a tread having profile blocks (1) and/or with at least one circumferentially circumferential profile rib, in which orin which, in plan view, incisions (5, 5l) extending at an angle (α) of 0° to 50° to the axial direction, each having two incision walls (7a, 7b), are formed, wherein each incision (5, 5l) extends at least in a incision region (5') extending over a part of the incision (5, 5l) in plan view to its maximum depth (tE) of 70% to 100% of the profile depth (TP), wherein the incision (5) in this incision region (5'), viewed in cross-section, comprises a straight, radially outer incision section (5a) with a width (ba) of 0.6 mm to 2.0 mm, an adjoining, bulging, arcuate middle incision section (5b), and a channel-shaped, radially inner incision section (5d) extending to the maximum depth (tE) with a maximum width (bd) of 150% to 400% of the width (ba) of the radially outer incision section (5a).The arc-shaped central incision section (5b) has a width (bb) which is at least 0.2 mm and is at least 0.2 mm smaller than the width (ba) of the radially outer incision section (5a).