| 摘要 |
<p>PURPOSE:To prevent collision of foreign matter in exhaust gas against turbine wheel, by forming a recess for collecting foreign matter in the outercircumferential wall face of scroll surrounding the turbine wheel then communicating between said recess and the downstream side of turbine through foreign matter discharge path. CONSTITUTION:A turbine housing 1 is provided with a spiral scroll 3 surrounding a turbine wheel 2 while an exhaust bypath 5 is opened to the side of inlet section of scroll 3. Then a recess 11 for collecting foreign matter is formed in the outercircumferential wall face of the scroll 3 to communicate between said recess 11 and path 5 throgh a foreign matter discharge path 12. Consequently, foreign matter flowing in through the inlet of scroll 3 together with exhaust gas is separated centrifugally through spiral gas flow to be caught in said recess 11 and pushed in said path 12. Then it is discharged through gas flow when a portion of exhaust gas is released through said path 12 to the downstream side of turbine.</p> |
