| 摘要 |
PROBLEM TO BE SOLVED: To provide a waste gate structure of a turbocharger that promotes temperature rise of an exhaust gas cleaning device and contact of exhaust gas and catalyst by mixing (unifying) exhaust gas, at a period, in which there are few exhaust gas emission amounts, right after internal combustion engine cold state start, and promotes exhaust gas cleaning by quickening catalyst activity.SOLUTION: In a waste gate structure of a turbocharger, a strip-shaped projection 52, which originates a swirl flow in the same direction as a swirl flow formed on the downstream side of an exhaust turbine, is provided in the periphery of a waste gate opening part 53. The waste gate structure makes a waste gate opened at the cold state of an internal combustion engine, and passes exhaust gas through the waste gate. |
