| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lubricating system of an internal combustion engine with turbocharger in which generation of oil-coking is restrained. <P>SOLUTION: The lubricating system 20 includes a primary turbocharger 6 and a secondary turbocharger 8 installed in parallel with each other. The lubricating system is applied to an internal combustion engine 1 in which when operation conditions of the engine is in specified operation ranges S1, S3, the exhaust-gas inlet from the secondary turbocharger 8 into a turbine 8b is controlled. When exhaust-gas inlet from the secondary turbocharger 8 into the turbine 8b is restrained, a lubricating-oil control-valve 22 is controlled so that quantities of the lubricating oil for the secondary turbocharger 8 are reduced. When such a specified inhibition condition is established that temperature of the secondary turbocharger 8 reaches specified upper-limit temperature or higher, control for reducing the quantity of the lubricating oil for the secondary turbocharger 8 is inhibited. <P>COPYRIGHT: (C)2009,JPO&INPIT |
