Turbocharger having reduced noise emissions
AssigneeCaterpillar Inc.
InventorsPeter D. Church, Phillip B. Gordon, Jr.
Life of this patent
Estimating the term…
Abstract
Turbocharger compressor wheels rotate at high speeds resulting in noise which is emitted therefrom. To widen the performance band of turbochargers certain efficiency improvements have increased the noise emitted therefrom above the normal level of acceptability by the operator and spectators. The present device for reducing noise emitted therefrom includes a noise reduction system. The system includes a series of deflector fins forming a torturous path between the series of deflector fins associated with the turbocharger compressor inlet and form a torturous path in a secondary inlet. The series of deflector fins have a preestablished spacing therebetween to further enhance the reduction of noise emitted from the turbocharger.
Claims16
A turbocharger comprising:
- an intake housing having an outer wall defining an intake opening therein and an inner wall positioned within the outer wall;
- a primary inlet formed within the inner wall;
- an annular chamber formed between the outer wall and the inner wall;
- a means for connecting interposed the annular chamber and the primary inlet forming a secondary inlet;
- a means for reducing noise emitted from the turbocharger, said means for reducing being a passive noise reduction system including a plurality of deflector assemblies having a series of deflector fins defining a preestablished space therebetween positioned in generally axial alignment with the annular chamber;
- and
- said preestablished space is determined by:
- ##EQU2## N=Number of spaces S=Turbocharger Speed (RPM)
- B=Number of Main Blades.
A turbocharger comprising:
- an intake housing having an outer wall defining an intake opening therein and an inner wall positioned within the outer wall;
- a primary inlet formed within the inner wall;
- an annular chamber formed between the outer wall and the inner wall;
- a means for connecting interposed the annular chamber and the primary inlet forming a secondary inlet;
- a means for reducing noise emitted from the turbocharger, said means for reducing being positioned in generally axial alignment with the annular chamber and forms a torturous path, said torturous path including a plurality of spaces formed by an offset inner radiused portion of a pair of outer fins and an outer surface of the inner wall, and an offset outer radiused portion of an inner fin and an inner surface of the outer wall.
Dependencies are inferred from the claim text.