HOUSING FOR AN INTERNAL COMBUSTION ENGINE
In one exemplary embodiment of the invention, a housing for an internal combustion engine includes a manifold section configured to receive an exhaust gas flow from cylinders of the internal combustion engine and a turbine section, wherein the turbine section and manifold section are a single member. Further, the housing includes a volute chamber within the turbine section configured to direct the exhaust gas flow to a turbine wheel disposed about a turbine axis and a circumferential septum positioned inside the volute chamber to separate two chambers that are substantially nested about the turbine wheel.
1 . A housing for an internal combustion engine, the housing comprising:
a manifold section configured to receive an exhaust gas flow from cylinders of the internal combustion engine;
a turbine section, wherein the turbine section and manifold section comprise a single member;
a volute chamber within the turbine section configured to direct the exhaust gas flow to a turbine wheel disposed about a turbine axis; and
a circumferential septum positioned inside the volute chamber to separate two chambers that are substantially nested about the turbine wheel.
2 . The housing of claim 1 , wherein the manifold section is coupled to a cylinder head housing the cylinders.
3 . The housing of claim 1 , wherein the circumferential septum separates a first chamber from a second chamber in the volute chamber, wherein the first chamber is radially inside the second chamber.
4 . The housing of claim 3 , wherein the first chamber is in fluid communication with a first group of cylinders and the second chamber is in fluid communication with a second group of cylinders.
5 . The housing of claim 3 , wherein the circumferential septum is configured to prevent radial fluid communication between the first and second chambers for at least a portion of the volute chamber.
6 . The housing of claim 3 , wherein at least a portion of the second chamber is defined by an outer wall of the volute chamber and the circumferential septum.
7 . The housing of claim 1 , wherein the housing is configured for use with a twin scroll turbocharger.
8 . The housing of claim 1 , wherein the two chambers are substantially concentric about the turbine axis.
9 . A housing for an internal combustion engine, the housing comprising:
a manifold section configured to receive an exhaust gas flow from cylinders of the internal combustion engine;
a turbine section, wherein the turbine section and the manifold section comprise a single member;
a volute chamber within the turbine section configured to direct the exhaust gas flow to a turbine wheel disposed about a turbine axis; and
a septum positioned inside the volute chamber to form a first chamber in fluid communication with the turbine wheel and a first group of cylinders and a second chamber in fluid communication with the turbine wheel and a second group of cylinders.
10 . The housing of claim 9 , wherein the manifold section is coupled to a cylinder head housing the cylinders.
11 . The housing of claim 9 , wherein the septum comprises a substantially radial septum with respect to the turbine axis.
12 . The housing of claim 9 , wherein the first and second chambers are nested about the turbine wheel and the septum comprises a substantially circumferential septum with respect to the turbine axis.
13 . The housing of claim 12 , wherein the circumferential septum is configured to prevent fluid communication between the first and second chambers for at least a portion of the volute chamber.
14 . The housing of claim 9 , wherein the housing is configured for use with a twin scroll turbocharger.
15 . An internal combustion engine, comprising:
a plurality of cylinders in a cylinder head;
a first portion of a turbine housing coupled to the cylinder head and in fluid communication with the plurality of cylinders;
a second portion of the turbine housing comprising a volute chamber housing a turbine wheel disposed about a turbine axis; and
a septum positioned inside the volute chamber to form a first chamber and second chamber, wherein the first chamber is in fluid communication with the turbine wheel and a first group of cylinders and the second chamber is in fluid communication with the turbine wheel and a second group of cylinders.
16 . The internal combustion engine of claim 15 , wherein the septum comprises a substantially radial septum with respect to the turbine axis.
17 . The internal combustion engine of claim 16 , wherein the first and second chambers are in fluid communication with the turbine wheel via axially adjacent circumferential passages on each side of the radial septum.
18 . The internal combustion engine of claim 15 , wherein the first and second chambers are nested about the turbine wheel and the septum comprises a substantially circumferential septum with respect to the turbine axis.
19 . The internal combustion engine of claim 18 , wherein the circumferential septum is configured to prevent radial fluid communication between the first and second chambers for at least a portion of the volute chamber.
20 . The internal combustion engine of claim 15 , wherein the turbine housing is configured for use with a twin scroll turbocharger.