Abstract: A drive system of a plug-in hybrid vehicle includes: an internal combustion engine; an electrical machine; an electrochemical storage device, which is configured to supply the electrical machine with electrical energy; and a conditioning system. The conditioning system is configured to precondition the electrochemical storage device and has an electric heating element. the conditioning system is configured, before the start of a journey, to activate a preconditioning function of the internal combustion engine and to preheat a coolant of the internal combustion engine by time-controlled activation of the electric heating element.

Abstract: An internal combustion engine includes a crankcase which accommodates cylinders, having at least one exhaust turbocharger and having an oil circuit containing at least one oil pump, in which engine oil is siphoned by at least one oil pump and delivered to the cylinders for lubrication, and in which the or each exhaust turbocharger is coupled to the oil circuit such that siphoned engine oil can be distributed to bearings of the respective turbocharger via an inlet line leading to the respective exhaust turbocharger and can then be expelled from the bearings of the respective exhaust turbocharger in the direction of an oil sump via an outlet line leading away from the respective exhaust turbocharger. The respective outlet line of the respective exhaust turbocharger is assigned a pressure limiting device, with the aid of which a vacuum prevailing at the bearings of the respective exhaust turbocharger can be limited.

Abstract: An internal combustion engine includes a crankcase which accommodates cylinders, having at least one exhaust turbocharger and having an oil circuit containing at least one oil pump, in which engine oil is siphoned by at least one oil pump and delivered to the cylinders for lubrication, and in which the or each exhaust turbocharger is coupled to the oil circuit such that siphoned engine oil can be distributed to bearings of the respective turbocharger via an inlet line leading to the respective exhaust turbocharger and can then be expelled from the bearings of the respective exhaust turbocharger in the direction of an oil sump via an outlet line leading away from the respective exhaust turbocharger. The respective outlet line of the respective exhaust turbocharger is assigned a pressure limiting device, with the aid of which a vacuum prevailing at the bearings of the respective exhaust turbocharger can be limited.