Starting from an acceleration signal, representative of a radial acceleration undergone by a portion of a crown region of said tyre due to the rolling of said tyre on a rolling surface, the trend of the first derivative of the radial acceleration is determined at a portion representative of the interaction of the tyre with a water layer. From the trend of the first derivative of the radial acceleration, it is determined at least one first parameter representative of an aquaplane condition of the tyre on the basis of a comparison between a first maximum and a second maximum of the first derivative at the portion representative of the interaction between tyre and water layer.

The invention concerns a tire damage detection system (1,1A) that includes an acquisition device (11), a processing system (12,12A) and a notification device (13,13A). The acquisition device (11) is installed on board a motor vehicle (2) equipped with two or more wheels fitted with tires, is coupled to a vehicle bus (20) of the motor vehicle (2), and is configured to acquire, from the vehicle bus (20), a signal indicative of a speed of a wheel of the motor vehicle (2) and output quantities indicative of the wheel speed. The processing system (12,12A) is configured to store a predefined tire damage model and to receive, from the acquisition device (11), the quantities indicative of the wheel speed, and is programmed to compute, based on the quantities indicative of the wheel speed, a normalized wheel speed indicative of a ratio of the wheel speed to an average wheel speed indicative of motor vehicle speed, and detect a potential damage to a tire of the wheel of the motor vehicle (2) based on the predefined tire damage model and on the normalized wheel speed. The notification device (13,13A) is configured to, if a potential damage to the tire of the wheel of the motor vehicle (2) is detected by the processing system (12,12A), signal the detected potential damage to a user (3) associated with the motor vehicle (2). In particular, according to the present invention, the processing system (12) is a cloud computing system (12A) that is wirelessly and remotely connected to the acquisition device (11), while the notification device (13) is an electronic communication device (13A) associated with the user (3) and remotely connected to the cloud computing system (12A) via one or more wired and/or wireless networks.

The disclosed technology includes a system comprising a tire-mounted inertial measurement unit (IMU). The IMU can be configured to measure linear acceleration data and angular velocity data associated with a tire, and the system can be configured to determine various indicators of tire health based on the linear acceleration data and angular velocity data. The system can be configured to determine a distance between the IMU and an outer rolling surface of the tire. The system can be configured to monitor changes in this distance over time, which can be indicative of tread wear over time. Accordingly, the system can be configured to monitor change in the tread depth over time such that the system is configured to monitor tread depth of the tire.

A load estimation system for a tire is provided. The tire includes a pair of sidewalls extending to a circumferential tread and supports a vehicle. A sensor is mounted to the tire and measures an inflation pressure of the tire and a footprint length of the tread. A vehicle loading state estimator determines a loading state of the vehicle. An inflation correction factor is determined from the vehicle loading state. A pressure correction module receives the measured footprint length, the measured inflation pressure, and the inflation correction factor, and determines an adjusted footprint length. A de-noising module processor receives the adjusted footprint length to generate a filtered footprint length, and a wear correction module receives the filtered footprint length and corrects for wear of the tire to generate a wear-corrected footprint length. A load determination model receives the wear-corrected footprint length and determines an estimated load on the tire.

A counter-deflection load estimation system for a tire is provided. The tire includes a pair of sidewalls extending to a circumferential tread and supporting a vehicle, and the vehicle includes a controlled area network bus. In the system, a sensor is mounted to the tire and measures a parameter of the tire. A counter-deflection of the tire is determined from the measured parameter, and a linear vehicle speed signal is received through the controlled area network bus. A processor is in electronic communication with the sensor and with the controlled area network bus. A load estimation module is in electronic communication with the processor, receives the linear vehicle speed signal and the counter-deflection of the tire, and determines a load on the tire.

A tire including a rubber sheet which covers an end of the carcass ply which has been folded back and an RFID tag serving as an electronic component provided between the bead filler and the rubber sheet, in which the bead filler is formed in an annular shape, the rubber sheet is formed in an annular shape by one end side and another end side of a long sheet being joined, and the RFID tag serving as the electronic component is disposed between the bead filler and the rubber sheet at a joint part which is a portion of the rubber sheet which is joined.

Tires formed of one or more tire plies are disclosed. In some implementations, tire plies may include a temperature sensor that may detect a temperature of a respective tire ply. The temperature sensor may include one or more split-ring resonators (SRRs), each having a resonance frequency that changes in response to one or more of a change in an elastomeric property or a change in the temperature of a respective one or more tire plies. In some aspects, the temperature sensor may include an electrically-conductive layer dielectrically separated from a respective one or more SRRs.

In a pneumatic tire with a carcass layer mounted between a pair of bead portions, a transponder is embedded in an outer side of the carcass layer in the tire width direction, a rubber member having the largest storage modulus at 20° C. of rubber members located on an outer side of the transponder in the tire width direction has a modulus M50out(0° C.) during 50% deformation at 0° C. and a modulus M50out(−20° C.) during 50% deformation at −20° C. that satisfy a relationship 0.50≤M50out(0° C.)/M50out(−20° C.)<1.00, and a rubber member having the largest storage modulus at 20° C. of rubber members located on an inner side of the transponder in the tire width direction has a modulus M50in(0° C.) during 50% deformation at 0° C. and a modulus M50in(−20° C.) during 50% deformation at −20° C. that satisfy a relationship 0.25≤M50in(0° C.)/M50in(−20° C.)<1.00.

A pneumatic tire includes: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions. The tire is embedded with a transponder covered with a covering layer. The secant modulus of elasticity at 10% deformation at 20° C. of the covering layer is in a range of from 0.5 MPa to 5.0 MP a.

A functional component capable of stably detecting information indicative of a usage state of a tire, including an electronic component capable of acquiring information on a tire is housed and which is attachable to an inner circumferential surface of the tire; a housing having a housing part in which the electronic component is housed and a bottom surface to be opposed to the inner circumferential surface of the tire; a strain detection means provided on the bottom surface and configured to detect strain of the tire; a support part extending from the bottom surface toward the inner circumferential surface of the tire and more protruding than a surface of the strain detection means; and an elastic part made of an elastomer having a rigidity smaller than that of a material forming the support part and interposed between the bottom surface and the inner circumferential surface of the tire.