Volvo Truck Corporation

Jens Pedersen

Fredrik Rahm

Johan Carlén Andersson

Anders Mohlin

The invention relates to an internal combustion engine comprising a crankshaft, one or more cylinders including a cylinder head, a piston, a combustion chamber, one or more intake valves, one or more exhaust valves, an intake system configured for feeding intake air to the engine, an exhaust system configured for conveying exhaust gas away from the engine, a pressure charging system connected to the intake system and an exhaust gas recirculation (EGR) system arranged to feed branched off exhaust gas from the exhaust system to the intake system via an EGR conduit wherein: &#x2014;the internal combustion engine includes a valve actuation device configured to allow for late or early closing of the intake valves in accordance with late or early Miller-type valve timing, and wherein&#x2014;the EGR system includes a gas feeding device configured to feed exhaust gas through the EGR conduit in modes of operation wherein the pressure in the intake system exceeds the pressure in the exhaust system. Additionally, a method of improving efficiency of an internal combustion engine is described.

Internal combustion engine

The invention provides an operation system for a vehicle, comprising an internal combustion engine () comprising a cylinder (), and an exhaust guide () being arranged to guide a gas flow from the cylinder () to the atmosphere, wherein the vehicle operation system further comprises a pneumatic system (), and an air conduit () connecting the pneumatic system () with the exhaust guide () for allowing a flow of compressed air from the pneumatic system into the exhaust guide ().

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Askim, Sweden

Jens Pedersen