Off-Road Tire Tread Layout for Traction, Drainage, and Lower Noise
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Solution Overview
Problem
Pneumatic tires designed for unpaved roads face challenges in balancing traction and drainage performance with noise reduction, often compromising on either driving performance or noise levels due to their large groove areas and block configurations.
Innovation Solution
A pneumatic tire design featuring a tread pattern with zigzag main grooves, shoulder lug grooves, center lug grooves of varying termination positions, and connecting grooves inclined oppositely, which disperses pattern noise peaks and enhances traction and drainage performance by maintaining a balance between groove volume and block rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large groove area with large blocks is adopted to improve driving performance on unpaved roads, then traction performance is improved, but noise performance deteriorates
Solution Approach 1:
The groove configuration is segmented into multiple types (shoulder lug grooves, center lug grooves, connecting grooves) with different orientations and patterns. This segmentation creates a complex groove structure that disperses noise peaks while maintaining effective drainage and traction areas, thus resolving the contradiction between traction performance and noise reduction
Solution Approach 2:
The tread pattern employs asymmetric groove arrangements where shoulder lug grooves and center lug grooves have different orientations relative to the tire width direction. This asymmetry creates varied noise radiation patterns that interfere with each other, reducing overall noise while preserving the biting edges needed for traction on unpaved surfaces
2Reliability
If a large groove area is used to prevent groove clogging and improve drainage, then driving performance on unpaved roads is improved, but pattern noise increases
Solution Approach 1:
The drainage function is segmented across multiple groove types (shoulder lug grooves for lateral drainage, center lug grooves for longitudinal drainage, connecting grooves for interconnection). This segmentation provides comprehensive drainage coverage while the distributed groove pattern disperses noise peaks, achieving both effective drainage and noise reduction
Solution Approach 2:
The groove pattern incorporates grooves extending in multiple dimensions - shoulder lug grooves extend in the tire width direction, center lug grooves extend in the tire circumferential direction, and connecting grooves link them. This multi-dimensional arrangement ensures drainage from all directions while creating a complex pattern that reduces noise
3Reliability
If blocks with large edge components are used to enhance biting performance, then traction on mud, snow, sand, and rocks is improved, but noise performance decreases
Solution Approach 1:
Different regions of the tread are assigned different groove qualities - shoulder areas have lug grooves optimized for biting edges and lateral drainage, while center areas have grooves optimized for longitudinal drainage. This local differentiation maintains biting performance through preserved edge components while reducing noise through region-specific groove configurations
Data Source
AI summary
A pneumatic tire includes shoulder lands and a center land, defined by main grooves on both sides of an equator in a zigzag pattern along a circumferential direction, are defined in a tread. Shoulder lug grooves extending in a width direction are formed in each of the shoulder lands. First and second center lug grooves, which extend from the shoulder lug grooves across each of the main grooves and are inclined at an angle of 45°-70° with respect to the width direction, are disposed in the center land. The first center lug groove terminates at the equator, and the second center lug groove terminates without reaching the equator. The first and second center lug grooves are alternately disposed in the circumferential direction. Connecting grooves inclined in an opposite direction to an inclination direction of the center lug grooves to connect the center lug grooves are formed in the center land.