Patent ID: 9181855
Filing Date: 2015-11-10
Classification: F01D,F02B,F02C,Y02T

Abstract:
1. A turbocharger for an engine, comprising: a housing at least partially defining a compressor shroud and a turbine shroud, the turbine shroud forming a volute having: an inlet configured to receive exhaust from an exhaust manifold of the engine in a tangential direction; and an axial channel disposed downstream of the inlet; a turbine wheel disposed within the turbine shroud and configured to receive exhaust from the axial channel; a compressor wheel disposed within the compressor shroud; a shaft connecting the turbine wheel to the compressor wheel; a nozzle ring disposed within the axial channel at a location upstream of the turbine wheel; an inner annular surface; and a tongue disposed coaxially outward of the inner annular surface; wherein the axial channel is formed between the inner annular surface and the tongue; and wherein a geometry of the volute is based in part on a ratio of a length of the tongue to a height of the axial channel; wherein: the ratio of the length of the tongue to the height of the axial channel is about 0.8 to 1.6; the ratio is greatest at an inlet of the volute; and the ratio converges to about zero as the interior surface winds tangentially inward.