Abstract: An internal combustion engine for gaseous fuel includes a cylinder and a piston for reciprocal movement in the cylinder along a reciprocal axis, whereby a combustion chamber is at least partially delimited by the cylinder and the piston. The piston includes a piston crown facing the combustion chamber, a piston crown projection of the piston crown in a direction parallel to the reciprocal axis and onto a piston crown plane extending transversally to the reciprocal axis having a piston crown center point, the piston crown comprising a piston bowl surface defining a piston bowl and a piston rim portion enclosing the piston bowl surface. A piston bowl opening is the intersection between the piston rim portion and the piston bowl surface. The piston bowl opening has an opening center of gravity in the piston crown plane. The opening center of gravity is offset from the piston crown center point.

Abstract: The present disclosure relates to a cylinder head configured to mount to a combustion cylinder of an internal combustion engine, ICE, the cylinder head including a cylinder head surface configured to face an internal combustion chamber of the combustion cylinder, a cavity including an inner cavity surface and a cavity side wall, the cavity extending from the cylinder head surface, along the cavity side wall, to the inner cavity surface in a direction away from the cylinder head surface, and an opening arranged in the inner cavity surface, the opening being configured to be provided with a fuel injector for feeding gaseous fuel into the combustion chamber, wherein the cavity side wall includes a surface discontinuity portion, the surface discontinuity portion being arranged at a distance from the inner cavity surface.

Abstract: A fuel injection arrangement admits a flow of hydrogen into a combustion chamber of hydrogen internal combustion engine. The fuel injection arrangement has a nozzle cap and an inlet valve arrangement. An inner surface of the nozzle cap comprises a nozzle protrusion protruding radially towards an envelope surface of a flow guiding portion of the inlet valve arrangement. The nozzle protrusion is arranged axially between a valve protrusion of the inlet valve arrangement and an outlet of the nozzle cap. The valve protrusion and the nozzle protrusion at least partly overlap in a radial direction.

Abstract: An internal combustion engine, system includes an internal combustion engine for combustion of gaseous fuel and having a combustion chamber at least partially delimited by a cylinder; a reciprocating piston moveable within said cylinder between a bottom dead centre (BDC) and a top dead centre (TDC), The reciprocating piston has a piston top end comprising a piston bowl intended to form part of the combustion chamber. A controllable fuel injector is arranged to inject gaseous fuel into the combustion chamber and towards the piston bowl. A controller controls the fuel injector to inject at least one gaseous fuel jet toward a bottom surface of the piston bowl during a fuel injection period occurring prior to an ignition event of the gaseous fuel.

Abstract: A fuel gas injection arrangement directly injects a gaseous fuel into a combustion chamber of an internal combustion engine. The fuel gas has a nozzle cap having a body part with an inner circumferential side partly defining an inner volume, an inlet for receiving gaseous fuel and at least one outlet at an axial end portion of the nozzle cap; an inlet valve arrangement at least partly accommodated in the body part. The inlet valve arrangement is movable between a closed position in which a portion of the inlet valve arrangement is in abutment with a valve seat of the nozzle cap to prevent fuel gas from entering the inlet, and an open position in which the fuel gas is allowed to flow between the inlet and the at least one outlet. The nozzle cap has a flow-guiding portion on the inner circumferential side and the inlet valve arrangement has a corresponding protruding flow-guiding portion protruding radially towards the inner circumferential side.

Abstract: A nozzle cap for a fuel gas injection arrangement of an internal combustion engine has: a body part defining an inner volume for accommodating a part of a movable valve arrangement, an inlet for receiving gaseous fuel, and at least one outlet arranged at an axial end portion of the nozzle cap. The at least one outlet permits discharge of one or more gas jets of fuel into a combustion chamber of the internal combustion engine. The axial end portion of the nozzle cap has a radial protrusion extending from an inner side of the nozzle cap towards an axial center axis and is delimited in a circumferential direction by axially-extending side sections, said radial protrusion having an inner surface region for reducing a crossflow of the fuel gas flow inside the nozzle cap and guiding said fuel gas flow towards the at least one outlet.

Abstract: An internal combustion engine system includes an internal combustion engine for combustion of gaseous fuel and has a combustion chamber at least partially delimited by a cylinder; a reciprocating piston moveable within said cylinder between a bottom dead centre and a top dead centre, said reciprocating piston having a piston top end comprising a piston bowl intended to form part of the combustion chamber The piston bowl has a plurality of spaced-apart protrusions circumferentially distributed around a centre axis on a bottom section of the piston bowl, each one of the spaced-apart protrusions extending a substantial part in a radial direction towards the centre axis; a controllable fuel injector injects gaseous fuel with a low injection pressure into the combustion chamber and toward the piston bowl; and a controller controls the controllable fuel injector to inject at least one gaseous fuel jet towards the bottom section of the piston bowl during a fuel injection period occurring prior to an ignition event o

Abstract: A piston for an internal combustion engine operable on a gaseous fuel is provided. The piston has a piston top end comprising a piston bowl for receiving at least one gaseous fuel jet from a fuel injector of the ICE, said piston bowl having a bottom section and a circumferential side section extending in an axial direction between the bottom section and a piston top end surface, wherein said bottom section comprises a protrusion segment configured to guide said at least one gaseous fuel jet. The protrusion segment further extends between spaced apart regions of the circumferential side section.

Abstract: A nozzle cap for a fuel injection nozzle operable in a hydrogen internal combustion engine includes an inlet for receiving a flow of hydrogen controllable by an inlet valve arrangeable in the inlet, at least one outlet for providing an exit flow of hydrogen, and an internal bottom flow-guiding body arranged at a bottom side of the nozzle cap downstream of the inlet in a nozzle cap volume, the internal bottom flow-guiding body protruding towards the inlet and comprises a flow-guiding surface for re-directing a flow of hydrogen from the inlet towards the outlet.

Abstract: A nozzle cap for a fuel injection nozzle operable in a hydrogen internal combustion engine includes an inlet for receiving a flow of hydrogen controllable by an inlet valve arrangeable in the inlet, at least one outlet for providing an exit flow of hydrogen, and an internal bottom flow-guiding body arranged at a bottom side of the nozzle cap downstream of the inlet in a nozzle cap volume, the internal bottom flow-guiding body protruding towards the inlet and comprises a flow-guiding surface for re-directing a flow of hydrogen from the inlet towards the outlet.

Abstract: An internal combustion engine for gaseous fuel includes a cylinder and a piston for reciprocal movement in the cylinder along a reciprocal axis, whereby a combustion chamber is at least partially delimited by the cylinder and the piston. The piston includes a piston crown facing the combustion chamber, a piston crown projection of the piston crown in a direction parallel to the reciprocal axis and onto a piston crown plane extending transversally to the reciprocal axis having a piston crown center point, the piston crown comprising a piston bowl surface defining a piston bowl and a piston rim portion enclosing the piston bowl surface. A piston bowl opening is the intersection between the piston rim portion and the piston bowl surface. The piston bowl opening has an opening center of gravity in the piston crown plane. The opening center of gravity is offset from the piston crown center point.

Abstract: An internal combustion engine for gaseous fuel includes a cylinder and a piston for reciprocal movement in the cylinder along a reciprocal axis, whereby a combustion chamber is at least partially delimited by the cylinder and the piston. The piston includes a piston crown facing the combustion chamber, a piston crown projection of the piston crown in a direction parallel to the reciprocal axis and onto a piston crown plane extending transversally to the reciprocal axis having a piston crown center point, the piston crown comprising a piston bowl surface defining a piston bowl and a piston rim portion enclosing the piston bowl surface. A piston bowl opening is the intersection between the piston rim portion and the piston bowl surface. The piston bowl opening has an opening center of gravity in the piston crown plane. The opening center of gravity is offset from the piston crown center point.

Abstract: An internal combustion engine for gaseous fuel includes a cylinder and a piston for reciprocal movement in the cylinder along a reciprocal axis, whereby a combustion chamber is at least partially delimited by the cylinder and the piston. The piston includes a piston crown facing the combustion chamber, a piston crown projection of the piston crown in a direction parallel to the reciprocal axis and onto a piston crown plane extending transversally to the reciprocal axis having a piston crown center point, the piston crown comprising a piston bowl surface defining a piston bowl and a piston rim portion enclosing the piston bowl surface. A piston bowl opening is the intersection between the piston rim portion and the piston bowl surface. The piston bowl opening has an opening center of gravity in the piston crown plane. The opening center of gravity is offset from the piston crown center point.

Abstract: Device for catalytic treatment of a gas flow including at least one body (1) that includes a catalytic material. The device has a number of first openings (5) for either entry of gas into or exit of gas from the catalyzer body (1), and a second opening (6) for either exit of the gas entering through the first openings or entry of gas into the catalyzer body (1) for subsequent exit through the first openings.

Abstract: Device for catalytic treatment of a gas flow including at least one body (1) that includes a catalytic material. The device has a number of first openings (5) for either entry of gas into or exit of gas from the catalyzer body (1), and a second opening (6) for either exit of the gas entering through the first openings or entry of gas into the catalyzer body (1) for subsequent exit through the first openings.