Patent ID: 11927232
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A degradation estimation device that is applied to a vehicle equipped with an automatic transmission including either or both of a clutch and a brake as an engagement element and that is configured to estimate a degree of degradation of a seal member attached to the engagement element of the automatic transmission, the degradation estimation device comprising:
a storage device configured to store mapping data that defines a map that outputs an output variable indicating the degree of degradation of the seal member when an input variable is input, the map including a thermal history variable and a load history variable as the input variable, the thermal history variable being a variable indicating a period during which the seal member has been exposed to a temperature within a predetermined temperature range, and the load history variable being a variable indicating the number of times a load has acted on the seal member; and
an execution device configured to perform an acquisition process and a calculation process, the acquisition process being a process of acquiring the input variable, and the calculation process being a process of outputting a value of the output variable by inputting the input variable acquired in the acquisition process to the map.