Scania Cv Ab

Eric Olofsson

Ola Stenlåås

Andreas Dahl

Håkan Sarby

Daniel Norling

Niclas Gunnarsson

Per-Inge Larsson, Sr

Michael Vallinder

Jonas Aspfors

Niklas Philipson

Martin Stenberg

Johan Linderyd

Henrik Höglund

Cedric Nyberg

Henrik Skog

Torbjörn Eliassen

Per Stålhammar

A four stroke internal combustion engine is disclosed comprising at least one cylinder arrangement, an exhaust conduit, and at least one turbine. The cylinder arrangement comprises an exhaust port arrangement configured to open and close an exhaust flow area, A. The cylinder arrangement has a maximum volume, V. The exhaust conduit extends between the exhaust flow area, A, and a turbine wheel inlet area, A, of the turbine and has an exhaust conduit volume, Vthat is &#x2264;0.5 times the maximum volume, V. The exhaust port arrangement is configured to expose the exhaust flow area, A, at a size of at least 0.22 times the maximum volume, V, when a piston of the cylinder arrangement is at the bottom dead centre, BDC.

Four stroke internal combustion engine

A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronized to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent the motion of the intake valve head.

Four-stroke internal combustion engine thereto related vehicle and method

A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronised to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent or reduce the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent or reduce the motion of the intake valve head.

A method to control a four-stroke combustion engine, comprising at least one cylinder; a piston arranged in each cylinder; at least one inlet valve arranged in each cylinder which is connected with an inlet system; at least one first camshaft which controls each inlet valve; at least one exhaust valve arranged in each cylinder which is connected with an exhaust system; at least one second camshaft which controls each exhaust valve; and a crankshaft which controls each camshaft. At least one phase-shifting device is arranged between the crankshaft and the second camshaft, to phase-shift the second camshaft in relation to the crankshaft to a state, where the exhaust valve is controlled in such a way, that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, to achieve engine braking through compression in the cylinders during the exhaust stroke.

Combustion engine, vehicle comprising the combustion engine and method for controlling the combustion engine

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Stockholm, Sweden

Eric Olofsson