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发明公开
CN105697747A 自动变速器油的劣化判定装置 失效 - 权利终止

自动变速器油的劣化判定装置
摘要：
本发明提供一种自动变速器油的劣化判定装置，其是简易的结构，且精度良好地判定用于自动变速器的工作及润滑的自动变速器油的劣化，所述自动变速器以旋转自如的方式支承于变速器壳体内。在用于以旋转自如的方式支承于变速器壳体内的自动变速器的工作及润滑的自动变速器油(ATF)的劣化判定装置中，对自动变速器油的油温进行检测(S12)，计算出所检测出的油温的上升率(S12)，基于车辆的行驶状态计算估计自动变速器油的消泡性能的降低的阀值(S14)，当判断为规定的条件已成立时(Sl0)，将所计算出的油温上升率与阀值进行比较，当所计算出的油温上升率为阀值以上时，判定为自动变速器油已劣化，促使用户进行更换(S16、S18)。
摘要（英）：

The invention realets to a deterioration determination apparatus for automatic transmission fluid, the deterioration determination apparatus is of a simple structure and can determine the deterioration of the automatic transmission fluid used for operation and lubrication of an automatic transmission in high precision, and the automatic transmission is rotatably supported in a transmission case. The deterioration determination apparatus which is used for determining the deterioration of the automatic transmission fluid used for operation and lubrication of the automatic transmission rotatably supported in the transmission case is configured to detect the oil temperature of the automatic transmission fluid (S12), calculate the rate of increase in the detected oil temperature (S12), calculate a threshold for estimating degradation of a defoaming property of the automatic transmission fluid on the basis of a travel condition of the vehicle (S14), compare the calculated oil temperature rate of increase with the threshold when a predetermined condition is determined to be established (S10), and determine that the automatic transmission fluid is deteriorated when the calculated oil temperature rate of increase is equal to or greater than the threshold, and urge the user to change the automatic transmission fluid when it is determined that the automatic transmission fluid is deteriorated (S16, S18).

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