| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotary supporting device for a turbocharger which can acquire stable rotation from a low temperature to a high temperature, which has long service life, and whose cost is suppressed low. <P>SOLUTION: A relatively expensive and high-heat-resistance material is used only for a component disposed near a discharge flow path and easily increased in temperature by heat of exhaust gas circulating through the discharge flow path. For a component near an air supply flow path through which the air of a relatively low temperature circulates, a conventional relatively inexpensive material is used. Thus, there is provided a low-cost ball bearing unit capable of acquiring stable rotation from a low temperature to a high temperature. <P>COPYRIGHT: (C)2012,JPO&INPIT |
