| 摘要 |
To provide a turbocharger capable of turbocharging efficiency and reducing cost by suppressing a rapid expansion of exhaust gas blown from an outlet of a scroll in the vicinity of an inlet of a rotor blade, a twin-scroll turbocharger (1) comprises a rear scroll (22), a front scroll (21), a scroll throat portion (24) configured to separate the scrolls, a rotor blade (3) configured to be rotated by exhaust gas, and a turbine housing (2) configured to form, with an outer circumferential portion of the rotor blade (3), the front scroll (21) and the rear scroll (22), and includes an inclined surface (28) on which an extended line of the incline of the surface facing toward the scroll throat portion (24) of the front scroll and an inlet (3a) of the rotor blade intersect at a position in a central portion of the inlet (3a) of the rotor blade, wherein the connection R at a crossing portion P where the inclined surface (28) and an inner periphery surface (26) of the turbine housing (2), having a gap of a constant width between the inner periphery surface (26) and an outer circumferential portion of the rotor blade (3), intersect has a shape such that the gap of a constant width ± continues to the position of the inlet (3a) of the rotor blade. |
