Patent ID: 8474259

Claim:
An internal combustion engine comprising: a crankcase which accommodates cylinders, an oil circuit containing at least one oil pump, in which engine oil is siphoned by the at least one oil pump and delivered to the cylinders for lubrication, exhaust turbochargers that are each coupled to the oil circuit in such a way that siphoned engine oil is configured to be delivered to bearings of the respective exhaust turbocharger via an inlet line leading to the respective exhaust turbocharger and is then expelled from the bearings of the respective exhaust turbocharger in a direction of an oil sump via an outlet line leading away from the respective exhaust turbocharger, wherein the outlet lines of the respective exhaust turbochargers are coupled to each other at a coupling point of the outlet lines and form a combined outlet line, wherein the at least one oil pump is connected to the combined outlet line downstream of the coupling point of the outlet lines in a direction of flow of the engine oil, wherein each of the outlet lines includes a pressure limiting device upstream of the coupling point of the outlet lines in the direction of flow of the engine oil, and wherein the pressure limiting device respective to each of the outlet lines limits a vacuum prevailing at the bearings of the respective exhaust turbocharger.