Patent ID: 6907733

Claim:
A variable geometry turbocharger, comprising: a pair of exhaust introducing walls arranged on opposite side of a nozzle located on a periphery of an exhaust turbine wheel; a plurality of nozzle vanes arranged between the exhaust introducing walls along the periphery of the exhaust turbine wheel at regular intervals, each said nozzle vane being swingably supported by a respective swine shaft; a swinging motion transmitting member coupled to each said swing shaft at a section thereof that projects from the pair of exhaust introducing walls; and a coupling ring linked to the swinging motion transmitting members to interlock the swinging motion transmitting members; wherein at least one of the swing shafts of the plurality of nozzle vanes comprises a swing drive shaft which is externally driven to move, and wherein a first part of the swing drive shaft that extends externally from the swinging motion transmitting member coupled to the swing drive shaft is more rigid than a second part of the swing drive shaft that extends between the swinging motion transmitting member and the corresponding nozzle vane.