Patent ID: 7191769

Claim:
An internal combustion engine with a two-stage exhaust gas turbocharger having a low pressure stage and a high pressure stage, the combustion engine comprising: a connection duct disposed between a compressor of the low pressure stage and a compressor of the high pressure stage; a charge air intercooler comprising a section of the connection duct and a cooling insert positioned in the section of the connection duct, wherein a coolant flows through the cooling insert; wherein a wall of the section of the connection duct forms a housing part of the charge air intercooler and defines a flow rate volume that is sufficient for effectively cooling charge air while flowing in the section of the connection duct around the cooling insert; wherein the section of the connection duct is formed as a substantially straight intercooler area that is open at at least one first axial end and has laterally deviating elbows on respective end regions or each axial end for supplying or conducting away the charge air, and wherein the cooling insert is configured as a pre-assembled cartridge comprising a base plate and a plurality of cooling pipes provided exteriorly with a plurality of cooling ribs, wherein the cooling pipes fit into bores formed in the base plate and communicate with a coolant distribution channel configured in the base plate.