| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust device for a turbocharged engine capable of stably introducing EGR gas to an intake system and improving emission performance and fuel economy performance. <P>SOLUTION: An engine CE is provided with a turbocharger 5 provided with a turbine having a first scroll part and a second scroll part 21, 22. Exhaust gas from a first cylinder and a fourth cylinder A, D of which exhaust strokes are not next to each other is supplied to the first scroll part 21 via a first collection exhaust passage 12, and exhaust gas from a second cylinder and a third cylinder B, C of which exhaust strokes are not next to each other is supplied to the second scroll part 22 via a second collection exhaust passage 13. A communication passage 17 communicating the first collection exhaust passage 12 and the second collection exhaust passage 13, and a open and close valve 18 closing the communication passage 17 under a low speed and high load condition and opening the same other than that condition is provided. An EGR passage 19 provided with an EGR valve 20 is connected to a communication passage 17. <P>COPYRIGHT: (C)2004,JPO |
