| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil temperature estimating device and a vapor generation state estimating device for an engine, configured to more accurately estimate an oil temperature and a vapor generation state of the engine at engine start.SOLUTION: If an engine oil temperature at engine stop (oil temperature memory value THOB) is lower than an engine water temperature at that time (water temperature memory value THWB) (S202: YES), an initial oil temperature as an engine oil temperature estimation value at engine start (oil temperature estimation value THO) is set as an engine water temperature at engine start (water temperature sensed value THW) (S203). If an engine oil temperature at engine stop is higher than an engine water temperature at that time (S202: NO), the initial oil temperature is set as a value obtained by subtracting an engine water temperature decline value at engine stop from an engine oil temperature at engine stop (oil temperature memory value THOB) (water temperature memory value THWB - water temperature sensed value THW) (S204). |
