Supercharged reciprocating internal combustion engine

Claim 2

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, characterized in that at least one housing means if provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means, exhaust gas conduit means of plural turbocharger means being joined to a common exhaust gas channel within said housing, and the compressor means and air conduit means are located exteriorly of the housing means.

Claim 3

A reciprocating internal combustion engine according to claim 1, with supercharger air cooler means, characterized in that the supercharger air cooler means are disposed exteriorly of the housing means.

Claim 4

A reciprocating internal combustion engine according to claim 2, characterized in that the at least one housing means is constructed so as to be gas-tight, and in that means are provided for thermally insulating said housing means.

Claim 5

A reciprocating internal combustion engine according to one of claims 1 or 3, characterized in that means are provided for enabling an attachement of the plurality of exhaust gas turbocharger means in a wall of the housing means.

Claim 6

A reciprocating internal combustion engine according to one of claims 1 or 3, characterized in that each of the plurality of exhaust gas turbocharger means is constructed as a single-stage exhaust gas turbocharger.

Claim 7

A reciprocating internal combustion engine according to claim 5, characterized in that at least four single-stage exhaust gas turbochargers are accommodated in the at least one housing means.

Claim 8

A reciprocating internal combustion engine according to one of claims 1 or 3, characterized in that at least two housing means are provided, at least two exhaust gas turbocharger means are accommodated in one of said housing means, and at least three exhaust gas turbocharger means are accommodated in the second of the at least two housing means.

Claim 9

A reciprocating internal combustion engine according to claim 7, characterized in that each of said exhaust gas turbocharger means is constructed as a single-stage exhaust gas turbocharger.

Claim 10

A reciprocating internal combustion engine according to one of claims 1 or 3, characterized in that each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, said high-pressure exhaust gas turbocharger and associated low-pressure exhaust gas turbocharger forming a supercharger group, and in that two supercharger groups are accommodated in said housing means and are arranged axially symmetrically with respect to a horizontal axis extending through the housing means.

Claim 11

A reciprocating internal combustion engine according to claim 9, characterized in that the high-pressure exhaust gas turbocharger of each of the supercharger groups is mounted in a common wall of the housing means, and in that the low-pressure exhaust gas turbocharger of each of the supercharger groups is mounted in opposed sidewalls of the housing means adjacent the common wall.

Claim 12

A reciprocating internal combustion engine according to claim 10, characterized in that at least two housing means are provided, each of said housing means accommodating at least two supercharger groups.

Claim 13

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that the at least one housing means includes four sidewalls, and in that an exhaust gas turbocharger means is mounted in each of the sidewalls.

Claim 14

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that the at least one housing means includes four sidewalls, and in that an exhaust gas turbocharger means is mounted in each of the sidewalls.

Claim 15

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, and in that a high-pressure exhaust gas turbocharger is mounted in each of two oppositely disposed sidewalls of the housing means and a low-pressure exhaust gas turbocharger is mounted in the other two oppositely disposed sidewalls of the housing means.

Claim 16

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, and in that a high-pressure exhaust gas turbocharger is mounted in each of two oppositely disposed sidewalls of the housing means and a low-pressure exhaust gas turbocharger is mounted in the other two oppositely disposed sidewalls of the housing means.

Claim 17

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, characterized in that each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, and in that a high-pressure exhaust gas turbocharger is mounted in each of two oppositely disposed sidewalls of the housing means and a low-pressure exhaust gas turbocharger is mounted in the other two oppositely disposed sidewalls of the housing means.

Claim 18

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, characterized in that each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, and in that a high-pressure exhaust gas turbocharger is mounted in each of two oppositely disposed sidewalls of the housing means and a low-pressure exhaust gas turbocharger is mounted in the other two oppositely disposed sidewalls of the housing means.

Claim 19

A reciprocating internal combustion engine according to one of claims 13 and 14, characterized in that a high-pressure exhaust gas turbocharger and an associated low-pressure exhaust gas turbocharger form a supercharger group, and in that two supercharger groups are arranged centrally symmetrically about a vertical axis extending through the housing means.

Claim 20

A reciprocating internal combustion engine according to claim 15, wherein the exhaust gas turbine means are centripetal exhaust gas turbines, characterized in that a central axis of the high-pressure exhaust gas turbocharger of each supercharger group extends perpendicular to a central axis of an associated low-pressure exhaust gas turbocharger, and in that a radial inlet nipple of an exhaust gas turbine means of a low-pressure exhaust gas turbocharger directly adjoins an axial outlet nipple of an exhaust gas turbine of an associated high-pressure exhaust gas turbocharger.

Claim 21

A reciprocating internal combustion engine according to claim 16, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and walls of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in the plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the high-pressure exhaust gas turbochargers.

Claim 22

A reciprocating internal combustion engine according to claim 17, characterized in that valve means are arranged in each of the pipe nipple means for enabling a selective blocking of a flow of the exhaust gases into the exhaust gas turbine means of the high-pressure exhaust gas turbocharger.

Claim 23

A reciprocating internal combustion engine according to claim 18, characterized in that the intermediate housing means is of a double-wall construction with a cooling medium jacket being defined between the double walls so as to enable a flow of engine coolant through the intermediate housing means.

Claim 24

A reciprocating internal combustion engine according to claim 19, characterized in that at least two housing means are provided and an intermediate housing means is provided for mounting the respective housing means on the engine, and in that at least two supercharger groups are accommodated in each of the at least two housing means.

Claim 25

A reciprocating internal combustion engine according to claim 20, characterized in that each of the at least two housing means are horizontally divided into a top section and a bottom section along a dividing plane, and in that the central axis of the respective high-pressure exhaust gas turbochargers and low-pressure exhaust gas turbochargers are horizontally disposed, and in that semicircular recess means are provided in the top section and bottom section of the respective housing means for enabling a mounting of the exhaust gas turbochargers in the dividing plane of the respective housing means.

Claim 26

A reciprocating internal combustion engine according to claim 21, characterized in that an exhaust gas nipple means common to all of the exhaust gas turbine means of the low-pressure exhaust gas turbochargers in the respective housing means is attached to the top section of the housing means, and in that inlet openings of the exhaust gas nipple means are arranged so that they are respectively disposed transversely in front of exhaust gas outlets of the exhaust gas turbine means of the low-pressure exhaust gas turbocharger means during assembly of the top section of the respective housing means.

Claim 27

A reciprocating internal combustion engine according to one of claims 13 or 14, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and walls of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in that plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the high-pressure exhaust gas turbochargers.

Claim 28

A reciprocating internal combustion engine according to claim 23, characterized in that valve means are arranged in each of the pipe nipple means for enabling a selective blocking of a flow of the exhaust gases into the exhaust gas turbine means of the high-pressure exhaust gas turbocharger.

Claim 29

A reciprocating internal combustion engine according to claim 24, characterized in that the intermediate housing means is of a double-wall construction with a cooling medium jacket being defined between the double walls so as to enable a flow of engine coolant through the intermediate housing means.

Claim 30

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that said at least one housing means is horizontally divided into a top section and a bottom section along a dividing plane, and in that means are provided in the top section and bottom section for enabling a mounting of the exhaust gas turbocharger means in the dividing plane of the at least one housing means.

Claim 31

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, characterized in that said at least one housing means is horizontally divided into a top section and a bottom section along a dividing plane, and in that means are provided in the top section and bottom section for enabling a mounting of the exhaust gas turbocharger means in the dividing plane of the at least one housing means.

Claim 32

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one houing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, and characterized in that said at least one housing means is horizontally divided into a top section and a bottom section along a dividing plane, and in that means are provided in the top section and bottom section for enabling a mounting of the exhaust gas turbocharger means in the dividing plane of the at least one housing means.

Claim 33

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one houing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, and characterized in that said at least one housing means is horizontally divided into a top section and a bottom section along a dividing plane, and in that means are provided in the top section and bottom section for enabling a mounting of the exhaust gas turbocharger means in the dividing plane of the at least one housing means.

Claim 34

A reciprocating internal combustion engine according to one of claims 26 and 27, characterized in that an exhaust gas nipple means common to all of the exhaust gas turbine means of the exhaust gas turbocharger means in the at least one housing means is attached to the top section of the housing means, and in that inlet openings of the exhaust gas nipple means are arranged so that they are respectively disposed transversely in front of exhaust gas outlets of the exhaust gas turbine means during assembly of the top section of the respective housing means.

Claim 35

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and walls of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in that plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the exhaust gas turbocharger means.

Claim 36

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and walls of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in that plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the exhaust gas turbocharger means.

Claim 37

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and wall of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in that plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the exhaust gas turbocharger means.

Claim 38

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, wherein the engine includes at least one longitudinally extending multi-sectional exhaust gas manifold means, characterized in that an intermediate housing means is provided for mounting said at least one housing means on the engine, said intermediate housing means gas-tightly encompasses the exhaust gas manifold means of the engine in such a manner so as to form a space between the manifold means and wall of the intermediate housing means, a plurality of perforations are provided in a topside of the intermediate housing means for communicating the same with the manifold means, vertically extending pipe nipple means are gas-tightly attached in each of the perforations and extends into the at least one housing means, and in that plug-in connection means are provided for connecting the pipe nipple means into inlet nipple means of the exhaust gas turbine means of the exhaust gas turbocharger means.

Claim 39

A reciprocating internal combustion engine according to one of claims 24 or 30, characterized in that valve means are arranged in each of the pipe nipple means for enabling a selective blocking of a flow of exhaust gases into the exhaust gas turbine means of the exhaust gas turbocharger means.

Claim 40

A reciprocating internal combustion engine according to claim 31, characterized in that the intermediate housing means is of a double-wall construction with a cooling medium jacket being defined between the double walls so as to enable a flow of engine coolant through the intermediate housing means.

Claim 41

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, and the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, and characterized in that the at least one housing means includes for sidewalls, and in that an exhaust gas turbocharger means is mounted in each of the sidewalls.

Claim 42

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, supercharger air cooler means disposed exteriorly of the housing means, and the at least one housing means is constructed so as to be gas-tight, means are provided for thermally insulating said housing means, and characterized in that the at least one housing means includes for sidewalls, and in that an exhaust gas turbocharger means is mounted in each of the sidewalls.

Claim 43

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, said high-pressure exhaust gas turbocharger and associated low-pressure exhaust gas turbocharger forming a supercharger group, and two supercharger groups are accommodated in said housing means, the at least one housing means includes four sidewalls, the high-pressure exhaust gas turbocharger of each supercharger group is mounted in a first sidewall and the low pressure exhaust gas turbocharger of said each supercharger group is mounted in a second sidewall.

Claim 44

A reciprocating internal combustion engine which includes a plurality of exhaust gas turbocharger means for supercharging the engine, each exhaust gas turbocharger means including exhaust gas turbine means, exhaust gas conduit means, compressor means, and air conduit means for supplying supercharged air to the engine, at least one housing means is provided for accommodating said plurality of turbocharger means, each of said turbocharger means is adapted to be mounted in a wall of the housing means in such a manner that the turbine means and exhaust gas conduit means are located in an interior of the housing means and the compressor means and air conduit means are located exteriorly of the housing means, each exhaust gas turbocharger means provides for a two-stage supercharging and includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger associated with said high-pressure exhaust gas turbocharger, said high-pressure exhaust gas turbocharger and associated low-pressure exhaust gas turbocharger forming a supercharger group, and two supercharger groups are accommodated in said housing means, the at least one housing means includes four sidewalls, the high-pressure exhaust gas turbocharger of each supercharger group is mounted in a first sidewall and the low pressure exhaust gas turbocharger of said each supercharger group is mounted in a second sidewall.