VARIABLE-CAPACITY EXHAUST TURBOSUPERCHARGER

摘要

The purpose of the present invention is to provide a variable-capacity exhaust turbosupercharger comprising a variable nozzle mechanism in which there is no risk of a nozzle support deforming at high temperatures. A variable-capacity exhaust turbosupercharger (1) comprising a variable nozzle mechanism (10) for controlling the flow of exhaust gas flowing between a nozzle mount and a nozzle plate by varying the blade angle of nozzle vanes, the variable nozzle mechanism having: a nozzle mount (2); a nozzle support (6) connected at one end to a surface (2a) of the nozzle mount; a nozzle plate (4) connected with the other end of the nozzle support, supported apart from the surface (2a) of the nozzle mount, and having one surface (4a) connected to the nozzle support and another surface (4b) located on the opposite side of the one surface and disposed facing an exhaust gas passage (20) through which exhaust gas flows; and a plurality of nozzle vanes (8) rotatably supported between the nozzle mount and the nozzle plate; wherein the nozzle plate is formed from a material having a smaller linear expansion coefficient than the material forming the nozzle mount.