| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit the overheat of a conversion catalyst provided in the downstream of a supercharger in an internal combustion engine provided with a supercharger. <P>SOLUTION: The internal combustion engine 1 is provided with a supercharger 3, a first conversion catalyst 10, and a catalyst bypass passage 8B making exhaust gas Ex flow while bypassing the first conversion catalyst 10. When the temperature of the first conversion catalyst 10 reaches a predetermined temperature or higher when a waistgate valve 3V of a turbine 3T opens, the waistgate valve 3V is opened after opening a valve element 9V of a bypass valve 9. Consequently, high temperature exhaust gas Ex passing through the waistgate 3W flows while bypassing the first conversion catalyst 10. <P>COPYRIGHT: (C)2007,JPO&INPIT |
