Life predicting device for vehicle component
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShigeru Kimura
Life of this patent
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Abstract
An interference margin between a stator and a rotor is measured after a rotary electric machine is manufactured, and the measured value is stored in a memory of a life predicting device as an allowable limit value. The life predicting device calculates a wear amount of a bearing portion of the rotary electric machine from an operation state amount of the rotary electric machine, and determines whether or not the rotary electric machine reaches an end of a life and maintenance is needed based on the calculated value and the allowable limit value stored in the memory.
Claims4
A life predicting device for a vehicle component that predicts a life of a vehicle component that is a component of a vehicle, the life predicting device comprising:
- an execution device;
- and
- a storage device, wherein:
- in a case where a value indicating a progress degree of aged deterioration of the vehicle component is defined as a deterioration degree, a value of the deterioration degree when the vehicle component reaches an end of the life is defined as an allowable limit value of the deterioration degree, and a value indicating a characteristic of each individual vehicle component is defined as an individual characteristic value,
- a value of the allowable limit value obtained from a measurement result of the individual characteristic value of the individual vehicle component that is a target of life prediction by the life predicting device is stored in the storage device in advance,
- the individual characteristic value includes a characteristic value for allowable limit value calculation used for calculating the allowable limit value and a characteristic value for deterioration degree calculation used for calculating the deterioration degree,
- a value of the characteristic value for deterioration degree calculation measured before the vehicle component is assembled into the vehicle is stored in the storage device in advance,
- the execution device executes
- acquisition processing of acquiring an operation state amount of the vehicle component in the vehicle,
- calculation processing of calculating the value of the deterioration degree based on a value of the operation state amount and the characteristic value for deterioration degree calculation, and
- output processing of generating information regarding the life of the vehicle component based on the deterioration degree and the allowable limit value and outputting the generated information, wherein:
- when a wear amount is greater than or equal to a predetermined amount, the execution device outputs a signal that activates a warning light in the vehicle, and
- when the wear amount is less than the predetermined amount, the execution device outputs a signal that deactivates the warning light in the vehicle,
- the vehicle component is a magnet-embedded rotary electric machine;
- the wear amount of a bearing portion of a rotor of the rotary electric machine is used as the deterioration degree;
- an interference margin between a stator of the rotary electric machine and the rotor is used as the characteristic value for allowable limit value calculation;
- and
- an imbalance amount of the rotor and a variation amount of a magnetic flux density between magnetic poles provided in the rotor are used as the characteristic value for deterioration degree calculation.
Dependencies are inferred from the claim text.