To reduce friction by properly warming a crank journal and the connecting rod circumference.
A bearing warming device makes the bearing of a crankshaft in an internal combustion engine warm. The bearing warming device includes a first warming device which makes a first crank journal to which lubricant is supplied from a main gallery warm and a second warming device which, while the lubricant being supplied from the main gallery, makes a second crank journal with which a lubricant supply path in a shaft which supplies the lubricant to a crank pin is connected warm. Moreover, a heat supply amount of the second warming device is set to become larger a heat supply amount of the first warming device. Accordingly, the crank journal and the connecting rod circumference, in which the heat is carried to the connecting rod side, can be properly warmed to reduce the friction.
YAMASHITA YOSHIYUKI
Toshiyuki Hatta
High Yoshitaka Hayashi
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