High efficiency turbocharger having secondary wastegate volute

Details High efficiency turbocharger having secondary wastegate volute High efficiency turbocharger having secondary wastegate volute

2005-12-27

2005-12-27

Richter, Sheldon J (Department: 3748)

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

Reexamination Certificate

active

06978615

ABSTRACT:
A turbocharger is provided having a wastegate valve and a first volute for conducting the primary turbine discharge flow stream. The first volute includes a discharge duct causing the primary turbine discharge flow stream to flow in a generally circular pattern as it is exhausted. A secondary volute is provided for conducting wastegate gases, the secondary volute having vanes causing the wastegate gases to flow in a generally circular pattern, matching the pattern of the primary turbine discharge flow stream. When the wastegate gas flow stream combines with the primary turbine discharge flow stream, the flow streams are moving in generally parallel circular pathways so that, when they combine, little or no turbulence is caused, thereby increasing the efficiency of the turbocharger. Increased efficiency translates into fuel economy and power and also improves the flow distribution of exhaust gases to the catalytic converter.

REFERENCES:
patent: 5584181 (1996-12-01), Jinnouchi
patent: 5857337 (1999-01-01), Kawasaki
patent: 6202413 (2001-03-01), Baker et al.
patent: 6594995 (2003-07-01), Heyes

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