The invention provides an inflatable car radial tire with a low-rolling resistance tread contour. Under the condition that other properties of the tire are not reduced, the purposes of improving the grounding condition, improving the deformation when the tire is in contact with the ground as well as reducing the tire rolling resistance are achieved by improving and controlling the tire tread contour shape. The tire comprises a tread, and the contour of the tread is sequentially divided into a first-section crown arc and a second-section crown arc on a tire radial section from the intersection of a tire equatorial plane and a tire tread contour to a tire crown at the starting part of a tire shoulder; the outer diameter R1 of the first-section crown arc, the outer diameter R2 of the second-section crown arc and the outer diameter R3 of the tire tread contour at the tire shoulder have the following relationship: 0.43<=R1/R2<=1 and 0.43<=R2/R3<=1; and the arc length alpha of the first-section crown arc, the arc length beta of the second-section crown arc and the tread width TDW have the following relationship: 0.33<=alpha/beta<=3 and 0.11<=beta/TDW<=0.431. According to the invention, by controlling smooth transition from the tire crown to the tire shoulder, the uniform distribution of stress in the tire grounding process is ensured, the horizontal and longitudinal deformation of the tire in a running process is reduced, and the tire rolling resistance is reduced.
Inflatable car radial tire with low-rolling resistance tread contour
2015-11-18
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |