Runflat Tire Sidewall Dimples for Heat Dissipation

The patent segments the sidewall structure by introducing multiple dimples that create divided lateral ribs and longitudinal ribs. This segmentation increases the surface area for heat radiation and creates turbulence pathways, allowing heat to dissipate more effectively from the load bearing layer while maintaining the segmented rubber structure's load support capability

The dimpled surface structure creates a porous-like configuration with multiple cavities and channels. This porous structure promotes air turbulence and enhances convective heat transfer from the sidewall, enabling the stiff crosslinked rubber to radiate heat more efficiently and avoid heat accumulation that causes peeling

The dimpled surface structure creates periodic turbulence patterns as air flows over the sidewall. This periodic action enhances convective heat transfer coefficients and maintains continuous heat dissipation during rotation, allowing the tire to run longer distances when deflated without excessive heat accumulation

The patent adds surface dimensionality by creating three-dimensional dimples and ribs on the sidewall. This dimensional change increases the effective heat radiation surface area and creates multiple airflow paths, enabling more efficient heat dissipation in the radial and circumferential directions simultaneously

The patent optimizes dimple parameters including size, depth, spacing, and distribution patterns to achieve effective heat radiation. By carefully controlling these parameters, the design balances heat dissipation performance with manufacturing feasibility, avoiding excessive complexity while maintaining thermal management effectiveness

The dimples are strategically positioned in specific regions of the sidewall where heat accumulation is most critical. This local quality approach concentrates the complex structure only where needed for heat management, rather than uniformly across the entire sidewall, reducing overall manufacturing complexity