| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a turbo-charger, by ensuring durability of a first/second ball bearing 7, 8 for supporting a rotary shaft 2a. SOLUTION: Lubricating oil passing through a first/second ball bearing 7, 8, without in/out flowing from a casing 18a, is circulated in this casing 18a. As a result, fine foreign matter existing in an engine is prevented from infiltrating into the first/second ball bearing, and even a heat soak back rotating the rotary shaft 2a in a condition with no lubricating oil fed into each of these ball bearings 7, 8 can be prevented. Consequently, durability of these first/second ball bearings 7, 8 can be ensured, the subject can be solved. |
