Patent ID: 8485779

Claim:
A turbocharger comprising: a turbine housing having a scroll passage outwardly of an exhaust nozzle which is arranged outwardly of a turbine impeller rotatably supported on a bearing housing and guides exhaust gas from the scroll passage to the turbine impeller, said exhaust nozzle having a plurality of nozzle vanes between front and rear exhaust introduction walls on sides of the bearing and turbine housings, respectively, vane shafts fixed to opposite sides of each of said nozzle vanes extending through the front and rear walls and being rotatably supported, the rear wall being arranged to have a gap between said rear wall and the turbine housing, through-holes of the rear wall communicating with said gap, wherein a sealing device for preventing the exhaust gas from said scroll passage from leaking via said gap to the turbine impeller is arranged upstream, in a travel direction of the exhaust gas, of the through-holes via which the vane shafts extend through the rear wall, whereby pressure in said gap communicating with said through-holes of the rear wall is kept lower than pressure in the exhaust nozzle and the exhaust gas in the exhaust nozzle flows through the through-holes into the gap so as to displace the nozzle vanes to the rear wall.