Tire for assembling rim of e.g. race vehicle, has crown reinforcement including structural extension and shearing rigidities in plane tangential to reinforcement that are higher than specific megapascal, irrespective of considered direction

摘要

#CMT# #/CMT# The tire (1) has a circumferential groove tread (7) filled with foam material, and a straight crown reinforcement (41) i.e. cylindrical shell, with width (Ls) higher than maximum width of contact between the reinforcement and a carcass reinforcement (3). The maximum width is obtained when the tire is assembled on a nominal assembling rim (2) and inflated to a nominal pressure and supports a nominal load. The reinforcement (41) has structural extension and shearing rigidities in a plane tangential to the reinforcement (41), higher than 10, 000 megapascal, irrespective of a considered direction. #CMT#USE : #/CMT# Tire for being assembled on an assembling rim of a vehicle (claimed) e.g. high speed vehicle such as race vehicle, and inflated to a nominal usage pressure i.e. 1 bar, and for carrying a nominal load. #CMT#ADVANTAGE : #/CMT# The design of the tire permits to avoid suppression of contact pressure irrespective of moving conditions during turning of the vehicle, while satisfying utilization constraints on the vehicle and permitting the tire to operate at a very low pressure. The design of the tire permits to control a ratio between a perpendicular contact pressure between the tire and the ground, and tangential force exerted by the ground on the tire in the pressure contact, thus ensuring better efficiency of driveability and hence permitting to utilize adherence characteristics of a tread material. The design of the tire permits to compensate engagement of natural camber of the tire, when the vehicle subjects a lateral acceleration during turning, thus avoiding modification of shape of contact mark and modification of distribution of pressure to the ground, and hence conserving satisfactory lateral adherence of the vehicle for a user. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a partial meridian sectional view of a tire inflated to a nominal pressure. Ls : Width 1 : Tire 2 : Nominal assembling rim 3 : Carcass reinforcement 7 : Circumferential groove tread 41 : Crown reinforcement #CMT#POLYMERS : #/CMT# The crown reinforcement is made of thermoplastic resin matrix, thermoplastic elastomer or thermosetting material reinforced by fibers such as glass and carbon fibers, and treated for permitting a connection with rubber material of the tire.