초록 ▼

A turbocharger with a variable turbine nozzle having a plurality of vanes provides reduced actuation forces by pressure balancing the vane support axles. A nozzle ring and insert ring are secured in substantially rigid spaced relation by a series of hollow spacers and bolts to position the vanes bet

A turbocharger with a variable turbine nozzle having a plurality of vanes provides reduced actuation forces by pressure balancing the vane support axles. A nozzle ring and insert ring are secured in substantially rigid spaced relation by a series of hollow spacers and bolts to position the vanes between the nozzle inlet from the volute and nozzle outlet adjacent the turbine. A chamber intermediate the turbine housing and the center housing of the turbocharger accommodates the actuation mechanism for the nozzle vanes and through communication with the nozzle inlet from the volute by the tolerances between the nozzle ring and various elements of the actuation linkage transmits exhaust gas pressure to impinge on an end of the first axle for each vane. Balancing exhaust gas pressure is transmitted through channels between the turbine housing and insert ring, which extend from the nozzle inlet to the apertures receiving the second axles, to impinge on an end of the second axle for each vane. A unison ring receiving vane arms extending perpendicular from the first axles is employed for rotating the vanes.

대표청구항 ▼

[ What is claimed is:] [1.] A variable nozzle for the turbine of a turbocharger comprising:a turbine housing having a volute receiving exhaust gas from an internal combustion engine and a nozzle inlet;a turbine received in the turbine housing for impingement of the exhaust gas from a nozzle outlet t

[ What is claimed is:] [1.] A variable nozzle for the turbine of a turbocharger comprising:a turbine housing having a volute receiving exhaust gas from an internal combustion engine and a nozzle inlet;a turbine received in the turbine housing for impingement of the exhaust gas from a nozzle outlet to drive the turbine;a plurality of vanes each having a first axle extending from one side of the vane and a second axle extending from an opposite side of the vane coaxial with the first axle;a nozzle ring having a plurality of apertures extending through the nozzle ring and closely receiving the first axles of the plurality of vanes;an insert ring having a plurality of apertures extending through the insert ring and closely receiving the second axles of the plurality of vanes;means for securing the nozzle ring and insert ring in substantially rigid spaced relation to position the vanes between the nozzle inlet from the volute and nozzle outlet adjacent the turbine;first means for transmitting exhaust gas pressure to impinge on an end of the first axle for each vane distal from the vane;second means for transmitting exhaust gas pressure to impinge on an end of the second axle for each vane distal from the vane; andmeans for rotating the vanes. [2.] A variable nozzle as defined in claim 1 wherein the first means for transmitting exhaust gas pressure comprises a chamber adjacent the nozzle ring distal from the vanes, said chamber having pressure communication with the nozzle inlet.