BEARING STRUCTURE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To efficiently raise the temperature of lubricating oil in a low-temperature condition when a rotating shaft of an internal combustion engine is supported by a radial slide bearing through lubricating oil.

SOLUTION: A bearing holding unit 13 includes a lubricating oil supply path 41 for supplying lubricating oil to a gap between a radial slide bearing 30 and a crank journal 18, and the radial slide bearing 30 includes a lubricating oil outlet port 43 for discharging lubricating oil from the gap between the radial slide bearing 30 and the crank journal 18. A heat-exchange oil path 42 communicating with the lubricating oil outlet port 43 is formed on the outer circumference of the radial slide bearing 30 within the bearing holding portion 13, and the lubricating oil passing through the heat-exchange oil path 42 performs heat exchange with the bearing holding unit 13.

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