Bridgestone Corporation

Kenji Toyoda

Hiroyuki Koseki

Kuninobu Kadota

Shun Ogane

Hiroaki Ono

Sayaka Mishima

Kazuya Kuroishi

Kosuke Akiba

Shunsuke Hiratsuka

Yuki Kawakami

The present invention is provided with a time-sequential load data acquisition unit that acquires data on a load of a predetermined loaded item in a time-sequential manner regarding a loading vehicle capable of loading the predetermined loaded item; a unit period setting unit that sets predetermined unit periods of which it is possible to change lengths according to a change in the load; a data division unit that divides time-sequential load data on the load of the loaded item by separating the time-sequential load data according to the unit periods; a representative value calculation unit that calculates respective representative values for each piece of divided data of the time-sequential load data divided by the data division unit; and a tire temperature prediction unit that predicts a temperature of tires mounted on the loading vehicle, at a specific time point, based on the respective representative values.

Tire temperature prediction system, tire temperature prediction program, and tire temperature prediction method

Provided with a tire temperature prediction unit configured to calculate a predicted tire temperature at a specific time point based on a history of operation information of a vehicle mounted with tires; a temperature tolerance calculation unit configured to calculate a temperature tolerance at the specific time point; a determination unit configured to determine whether or not the temperature tolerance is within a preset tolerance range; an information generation unit configured to generate vehicle operation change information which changes operation of the vehicle when the determination unit determines that the temperature tolerance is within the tolerance range; and a communication unit configured to transmit the generated vehicle operation change information to the vehicle or to an external system which manages the operation of the vehicle.

Vehicle operation management system that generates vehicle operation change information when temperature tolerance is within tolerance range, vehicle operation management program, and vehicle operation management method

The disclosed pneumatic tire () comprises a stiffener () and a rubber pad () which, disposed between a toroidal carcass body () and a folded-back carcass portion () folded back at a bead core (), are arranged so as to be oriented radially outwards of the tire from the bead core (). Further, from the rim baseline (BL), the height KSH to the end (A) of the stiffener (), the height OWH to the maximum carcass width (W), and the height FH to the end (A) of the rim flange () fulfill 0.2&#x2266;[(KSH&#x2212;FH)/(OWH&#x2212;FH)]&#x2266;0.28.

Pneumatic tire

A pneumatic radial tire for use in heavy duty vehicles comprises a belt having a particular structure wherein a rubberized strip containing one or more cords is slantly extended from one of both side edges of the belt toward the other side edge with respect to an equatorial plane of the tire and continuously extended substantially zigzag in a circumferential direction of the tread while bending at each side edge of the belt at different inclination angles of the strip with respect to the equatorial plane in each of side regions of the belt before and after the bending at the side edge.

Pneumatic radial tires with zigzag belt having different cord angles

A pneumatic radial tire for heavy duty vehicles comprises a radial carcass, a belt, a belt reinforcing layer and a tread, in which the belt has a particular structure formed by using a rubberized strip containing one or more cords therein, and the belt reinforcing layer comprised of at least one rubberized cord ply in a region corresponding to at least each side region of the tread, and the belt and the belt reinforcing layer satisfy a ratio h/h.sub.0 of not more than 65%. In the tire of the above structure, the occurrence of shoulder wear is controlled together with the avoidance of belt end separation and the durability is improved.

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Tokorozawa, Japan

Kenji Toyoda