Volvo Truck Corporation

Volvo Lastvagnar Ab

Volvo Technology Corporation

Peter Mårdberg Jozsa

Arne Andersson

An internal combustion engine system includes a cylinder block with a plurality of cylinders, a gas intake manifold for providing at least air to the cylinder block and an exhaust gas manifold for exiting the exhaust gas from the cylinder block, wherein the exhaust gas manifold includes at least a main exhaust gas outlet and a waste gate exhaust gas outlet, wherein the main exhaust gas outlet is connected to a main exhaust gas pipe for guiding the exhaust gas to a main exhaust gas after treatment system and the waste gate exhaust gas outlet is connected to a waste gate exhaust gas pipe, and wherein the waste gate exhaust gas pipe is reconnected to the main exhaust gas pipe upstream of the main exhaust gas after treatment system and includes at least one waste gate exhaust gas after treatment unit, such as an oxidation catalyst such as a diesel oxidation catalyst, for catalytically treating the exhaust gas streaming through the waste gate exhaust gas pipe, and to a method for increasing the temperature in an internal combustion engine system.

Internal combustion engine system and method for increasing the temperature in at least one part of the internal combustion engine system

A method and an arrangement are provided for reducing a NOx-content in the exhaust gas of an internal combustion engine in a vehicle. An exhaust gas recirculation supplies exhaust gas from the exhaust outlet to the intake of the internal combustion engine, and at least two energy absorbers are provided in series in the exhaust flow downstream of the exhaust outlet and absorb energy of the exhaust gas. The exhaust gas is overheated to a first temperature by driving the combustion engine in a range of rotational speed producing hot exhaust gas at the exhaust outlet. The first temperature is sufficient to drive the at least two energy absorbers. A temperature of the exhaust gas is established downstream of the at least two energy absorbers sufficient to remove NOx from the exhaust gas in the exhaust after treatment system with an efficiency of more than 80%.

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Göteborg, Sweden

Peter Mårdberg Jozsa