Vehicle tyre with balanced lateral forces for reduced rolling resistance
AssigneePirelli Tyre S.p.A.
InventorsLuca Camosi, Davide Miazzo, Ilaria Ghezzi
Life of this patent
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Abstract
A vehicle tyre with an asymmetric internal structure and external profile relative to its middle line plane. When mounted on a rim and installed with a camber angle, the rotating tyre generates lateral forces during straight-line running: a camber force from the wheel's inclination, a structural force from the asymmetric internal construction, and a conicity force from the asymmetric external profile. The conicity force opposes the camber force direction, and its magnitude remains below the structural force magnitude. This configuration enables control of the resulting lateral force while reducing rolling resistance during straight-line operation.
Claims12
A tyre for a motor vehicle, the tyre comprising:
- an asymmetric internal structure with respect to a middle line plane of the tyre;
- and
- an asymmetric external profile with respect to the middle line plane of the tyre,
- wherein:
- the asymmetric external profile is configured to generate a lateral conicity force between the tyre and the ground during rectilinear running;
- the asymmetric internal structure is configured to generate a structural lateral force between the tyre and the ground during rectilinear running;
- the tyre is configured to be installed on a rim and mounted on the vehicle with a camber angle;
- the tyre is configured such that said camber angle generates a lateral camber force between the tyre and the ground during rectilinear running;
- and
- the asymmetric internal structure and asymmetric external profile are configured such that one direction of the lateral conicity force is discordant with respect to a direction of the lateral camber force and a modulus of the lateral conicity force is smaller than a modulus of the structural lateral force, so as to control a resulting lateral force comprising at least the lateral conicity force, the lateral camber force, and the structural lateral force and to limit a rolling resistance of the tyre running on rectilinear trajectory.
Dependencies are inferred from the claim text.