Tread Block Optimization for Tires

A tire design with improved wet steering stability, vehicle external noise resistance, and wear resistance in a balanced manner. The tire has four circumferential main grooves, defining lands, chamfered portions, and inclined grooves. At least one circumferential narrow groove is added in the lands. This configuration provides balanced wet steering stability, noise reduction, and wear resistance. The narrow grooves in the lands improve wet grip, the chamfered portions reduce edge effects, the inclined grooves further reduce noise, and the overall design maintains wear resistance.

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Tire tread design with improved snow and ice traction without sacrificing dry road performance. The tread has sipes and slots with specific angled features. The key edge of the sipe is angled inward at an angle KA, and the chamfer portion is angled at a different angle CA. This configuration provides better snow traction compared to standard sipes, especially during braking or acceleration. The angled edges retain more contact area during braking to improve braking performance.

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Tire tread design with improved snow traction. The tire has a circumferential tread with transverse grooves that have varying depths along their length. The deeper end of the groove is closer to the sidewall and the shallower end is nearer the tire equator. This creates protrusions in the shallower section of the groove. These protrusions provide additional biting edges for snow traction compared to a uniform depth groove. The varying depth design allows the protrusions to engage snow without compromising snow shedding performance in other conditions.

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The contact characteristics of radial tires are crucial for optimizing stress distribution, deformation, and wear. non-uniform behavior induced by complex tread patterns remains under-explored in existing tire mechanics research. Taking the 205/50R17 as a representative case, reverse modeling approach was employed to develop an accurate finite element model incorporating intricate pattern features. fidelity proposed simulation confirmed utilizing high-precision contour profiling techniques. impact diverse usage conditions design parameters on outer profile ground under static free-rolling states analyzed. Experimental observations demonstrate that increased inflation pressure leads proportional decrease area. Under incremental vertical loading, patch develops progressively into saddle-shaped geometry featuring elevated shoulder regions recessed central zone. Increasing belt angle compromises its hoop-stiffening function, thereby inducing elliptical geometry. Larger diameters compromise length symmetry regions. Variation thickness at 85% width results significant difference between le... Read More

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A pneumatic tire with improved wet and snow performance by optimizing the tread pattern. The tire has alternating pairs of asymmetrically inclined main grooves extending from the ground contact edge to the equator. These form staggered land portions extending from the equator to the ground. The innermost blocks in each land have notches opening to the main groove connections, improving drainage. This pattern provides enhanced snow traction, braking, and wet grip compared to traditional symmetrical treads.

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A tire design with improved wet braking performance and steering stability while reducing rolling resistance compared to traditional tires. The tire has circumferential blocks separated by circumferential grooves. The blocks have chamfered edges at the inner and outer ends of the lateral grooves. These chamfered edges provide drainage channels for water evacuation during braking. The chamfer angles and relative sizes of the chamfers optimize wet performance and steering stability without excessive rolling resistance.

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Tire tread design that maintains ride comfort and wet performance as the tread wears. The tread has a main groove with recessed sections that push water away from the tire contact patch. The recessed sections have a specific ratio of depth to groove width when worn versus new. The ratio is 1.05-1.40 for sea ratio and 0.95-1.04 for hardness ratio. This prevents excessive wear and keeps ride comfort and grip as the tread wears. The recessed sections are alternating on the groove walls. The tread also has a specific rubber composition that changes less with aging.

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Heavy duty pneumatic tire with improved wet traction and wear resistance. The tire has a zigzagging crown circumferential groove and a zigzagging shoulder circumferential groove. Adjacent crown lateral grooves connect the crowns to shoulders. The crown blocks have smaller sub-grooves with fewer, shorter transverse grooves compared to the wider lateral grooves. This configuration provides enhanced wet traction from the zigzagging main grooves, while the smaller sub-grooves prevent excessive wear.

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Motorcycle tire with tread design to reduce wear step formation. The tire has a curved tread profile. The land ratio, or width-to-height ratio, of each zone between the tread edges and ground contacting surface is specified. This prevents excessive wear step formation at the edges of the tread by optimizing the wear distribution. The curved tread shape and controlled land ratios suppress the step wear that can occur in the center of the tread due to its shape.

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Tire with improved braking performance and reduced noise compared to conventional tires with shoulder sipes. The tire has a tread with specific sipe configurations on the shoulder region. The sipe design involves chamfered edges on the shoulder sipes. During braking or cornering, the chamfered edges prevent the sipe edges from getting pulled inside the land region and lifting the surface, allowing better grip and braking performance compared to conventional sipes. The chamfered edges also reduce the noise generated by the sipes contacting the road. The tire also has sipes only on the ground contacting surface of the first shoulder land region between the edge and tread, which further improves braking performance by preventing lifting of the land region.

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A tire with grooves that improve ride comfort and steering stability. The tire has a tread with grooves that have widening sections. The widening sections have an inner portion that is narrower than the outer portion. This design allows the inner portion to flex more than the outer portion when the tire is loaded, providing better steering stability. The wider outer portion prevents the inner portion from collapsing too much under load. The widening sections also have curved surfaces that prevent the inner and outer walls from touching when loaded. This prevents stiffness increases. The length of the inner portion is at least 15% of the groove depth.

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Pneumatic vehicle tires with improved wet grip and better transmission of tractive force as the tread wears. The tires have treads with profile ribs having sipes that extend parallel to each other. The depth of the main portion of each sipe is less than the depth of the edge portion that leads into the cavity between the rib and groove. This configuration allows good wet grip as the depth of the main sipe portion reduces with wear, while still maintaining stiffness from the wider cavity portion.

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Tire tread for heavy construction vehicles that improves grip, especially on muddy terrain, while also increasing wear resistance. The tread has blocks with concave contact faces and a distribution of radial heights between the inner and outer portions that allows better penetration and anchoring. The concave contact faces have at least three pairs of sides forming angles greater than 180 degrees. This shape provides better grip and traction compared to convex contact faces. The radial height of the outer penetration portion is 0.1-0.6 of the total block height.

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Pneumatic tire design that improves both wet and dry steering stability without compromising one over the other. The tire has outer side profiles with multiple curved lines of different shapes between the tire edges. This reduces the difference in ground contact pressure between the edges and center. This balances wet steering benefit from better drainage with dry steering by distributing force more evenly. The inner side profile can have 1 or more curved lines.

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Pneumatic tire with improved grip and durability at high speeds. The tire has a tread with at least two rubber compounds with different thermal conductivities in the ground contacting surface. This allows efficient heat dissipation during high-speed running to prevent excessive heat buildup. The tire also has specific dimensions and groove geometry to further enhance grip and durability.

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Pneumatic vehicle tire with improved cooling and stone trapping resistance in the shoulder region. The tire has sidewall and tread with a shoulder-side profile rib containing depressions. The depression openings are elongated rectangular or trapezoidal, with angled end flanks and a base that transitions from inner base to outer base to a convex middle base. The depression length is 30-50% of the rib width. This shape provides better cooling by maximizing surface area and stone trapping resistance by preventing stone retention. The zigzag groove shape and depression placement beside bend inner sides further improves rigidity and cooling.

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The prediction of tire rolling resistance is importance in both academic and engineering. Classic computational methods are complexity low efficiency. This paper proposes a method based on cumulative changes strain energy density to calculate resistance. Obtain the stress stains states various components by Finite Element Analysis (FEA), apply Karmals formula for computation changing density. proposed achieves good tendency between measurement results. Moreover, efficiency reduced 1/12 that classic methods. can be used complex simplified tread patterns tires predicting.

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A tire design with improved braking performance on dry roads without compromising wet grip and noise levels. The tire has a tread with multiple circumferential grooves separating land portions. The land portions each have sipes that communicate with the circumferential grooves. The sipes have widened sections near the outer edge. One unique feature is that the widened section of the shoulder sipe overlaps the widened section of the middle sipe in the tread view. This improves rigidity while reducing noise. The shoulder sipe also has an angled section toward the outer edge. The depth of the shoulder sipe widening is less than the middle sipe widening. This asymmetry reduces edge deformation and shearing during braking.

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Pneumatic tire with improved wet grip and noise reduction compared to conventional tires. The tire has a tread design with a specific pattern layout and feature sizes. The tread has an outer main circumferential groove extending around the tire circumference. The main groove has multiple circumferential main grooves spaced apart by circumferential land portions. The tread also has multiple lateral grooves extending between adjacent circumferential main grooves. The lateral grooves have multiple lateral land portions between them. The main grooves have a maximum depth greater than the lateral grooves. The lateral grooves have a maximum width greater than the circumferential main grooves. The circumferential main grooves have a maximum width greater than the lateral land portions. This tread layout with specific dimension relationships improves wet grip and steering stability while also reducing noise compared to conventional tires with different tread patterns.

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Tire design with improved ride comfort and noise performance. The tire has a tread with specific width ratios between the shoulder, middle, and crown land portions. The shoulder land portions have wider widths relative to the middle and crown land portions. This uneven width distribution reduces uneven ground contact pressure and improves grip. It also prevents pitch sounds from overlapping and improves noise. The tire also has sipes arranged optimally in the crown land portion for performance balance.

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