System for predicting tire casing life
A system for predicting tire casing life remaining for a casing in a tire, the system including: a tire condition measurement unit that measures one characteristic value including tire internal pressure information indicating at least one of a tire condition and a vehicle running condition; a temperature history estimation unit that estimates a temperature history of at least one location in at least one casing structural member based on the characteristic value; a member physical property calculation unit that calculates at least one current physical property value of the at least one casing structural member that degrades due to tire internal air temperature based on at least the tire internal pressure information and the temperature history; and a remaining drivable distance prediction unit that predicts a drivable distance of the tire until the current physical property value reaches a physical property value limit set in advance.
1. A system for predicting tire casing life remaining for a casing in a tire provided with tread rubber and with the casing, the casing positioned inwards from the tread rubber in a tire radial direction and including at least a carcass ply, the system comprising:
a tire condition measurement unit configured to measure at least one characteristic value including tire internal pressure information indicating at least one of a tire condition and a vehicle running condition;
a temperature history estimation unit configured to estimate a temperature history of at least one location in at least one casing structural member based on the characteristic value measured by the tire condition measurement unit;
a member physical property calculation unit configured to calculate at least one current physical property value of the at least one casing structural member that degrades due to tire internal air temperature based on at least the tire internal pressure information and the temperature history for the at least one casing structural member estimated by the temperature history estimation unit and on physical property value information, acquired in advance by testing and stored in a database, including tire internal pressure, temperature history information for the at least one casing structural member, and a physical property value of the at least one casing structural member; and
a remaining drivable distance prediction unit configured to predict a drivable distance of the tire until the current physical property value calculated by the member physical property calculation unit reaches a physical property value limit, set in advance, based on a difference between the current physical property value and the physical property value limit.
2. A system for predicting tire casing life remaining for a casing in a tire provided with tread rubber and with the casing, the casing positioned inwards from the tread rubber in a tire radial direction and including at least a carcass ply, the system comprising:
a tire condition measurement unit configured to measure at least tire internal pressure information and temperature history of tire internal air temperature at one or more locations indicating at least one of a tire condition and a vehicle running condition;
a member physical property calculation unit configured to calculate at least one current physical property value of at least one casing structural member that degrades due to tire internal air temperature based on at least the tire internal pressure information and the temperature history of tire internal air temperature measured by the tire condition measurement unit and on physical property value information, acquired in advance by testing and stored in a database, including tire internal pressure, temperature history information of tire internal air temperature, and a physical property value of at least one casing structural member; and
a remaining drivable distance prediction unit configured to predict a drivable distance of the tire until the current physical property value calculated by the member physical property calculation unit reaches a physical property value limit, set in advance, based on a difference between the current physical property value and the physical property value limit.
3. The system for predicting tire casing life according to claim 1 , wherein
the tire internal pressure information includes at least tire internal pressure application time indicating an amount of time internal pressure is applied to the tire, and
the member physical property calculation unit calculates the at least one current physical property value of the at least one casing structural member based on the tire internal pressure information and on the temperature history.
4. The system for predicting tire casing life according to claim 1 , further comprising a drivable distance adjustment unit configured to adjust the drivable distance based on tire usage condition information.
5. The system for predicting tire casing life according to claim 1 , wherein
the tire condition measurement unit consecutively measures at least one characteristic value, and
the temperature history estimation unit estimates the temperature history consecutively based on the at least one characteristic value consecutively measured by the tire condition measurement unit.