Patent ID: 8112995

Claim:
A turbocharger with variable turbine geometry comprising: a turbine housing having an exhaust gas inlet and an outlet, a volute connected to the inlet, and a nozzle wall adjacent the volute, the turbine housing carrying a turbine wheel that is attached to a shaft; a plurality of vanes of aerodynamic profile provided between a vane ring and a spacer disc mounted on the turbine housing, the vanes are disposed within the turbine housing between the exhaust gas inlet and the turbine wheel the vane ring includes an outer ring and a peripheral ring, and the vanes are pivotally supported by the vane ring; each vane having a leading edge and a trailing edge, the leading edge being positioned at a first inner and outer airfoil surface junction and the trailing edge being positioned at a second inner and outer airfoil surface junction; the vanes include vane shafts that are rotatably supported on and extend through the vane ring, and actuation links are fixed to the vane shafts, the actuation links are engaged in respective slots in a rotatable claw plate; the thickness to length ratio of the vanes is in the range of 0.16-0.50; there is no spacer arrangement to separate the vanes from the vane ring; a plurality of rollers integrally made with a dowel pin and connected to the claw plate; and the vane ring includes a circular slot that receives the plurality of rollers.