Piston and an internal combustion engine system
AssigneeVolvo Truck Corporation
InventorsJan Eismark, Tommy Simonsson, Rickard Ehleskog, Gustavo Hindi
Life of this patent
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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.
Claims22
A piston for an internal combustion engine (ICE), operable on a gaseous fuel, said piston having 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,
- wherein said protrusion segment further extends between spaced apart regions of the circumferential side section, and
- wherein the extension of the protrusion segment in the axial direction does not exceed the piston top end upper surface of the piston, as defined by the circumferential side section.
An internal combustion engine (ICE), system comprising:
- an internal combustion engine for combustion of gaseous fuel and having a combustion chamber at least partially delimited by a cylinder;
- a piston having 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,
- wherein said protrusion segment further extends between spaced apart regions of the circumferential side section, and
- wherein the extension of the protrusion segment in the axial direction does not exceed the piston top end upper surface of the piston, as defined by the circumferential side section, wherein said piston is moveable within said cylinder between a bottom dead centre (BDC) and a top dead centre (TDC), said piston bowl being intended to form part of the combustion chamber;
- a controllable fuel injector arranged to inject gaseous fuel into the combustion chamber and towards the piston bowl;
- and
- a controller configured to control 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 of the gaseous fuel.
A vehicle comprising a piston having 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,
- wherein said protrusion segment further extends between spaced apart regions of the circumferential side section, and
- wherein the extension of the protrusion segment in the axial direction does not exceed the piston top end upper surface of the piston, as defined by the circumferential side section.
Dependencies are inferred from the claim text.