| 摘要 |
PROBLEM TO BE SOLVED: To inform of a proper oil change timing which may be different in each vehicle according to a using way of a vehicle, following evaluation of the degree of severity of a using mode of hydraulic oil.SOLUTION: The using way of a vehicle is monitored by acquiring a plurality of deterioration elements related to various deterioration factors which may progress deterioration of the hydraulic oil generated corresponding to traveling of the vehicle, and the degree of severity of the using mode of the hydraulic oil in a transmission loaded on the vehicle is determined based on an oil deterioration estimated value calculated based on the plurality of deterioration elements. Then, a change timing of the hydraulic oil is determined corresponding to the degree of severity of the using mode of the hydraulic oil, and reported. Thus, a future progression degree of deterioration of the hydraulic oil can be estimated by evaluating the degree of severity of the using mode of the hydraulic oil based on the various deterioration factors which may accelerate deterioration of the hydraulic oil, and thereby the proper oil change timing which may be different in each vehicle according to the using way of the vehicle can be determined, and reported beforehand to each vehicle. |
