Dual fuel nozzle arrangement

A nozzle assembly of a dual fuel injector of an internal combustion engine, said nozzle assembly extending along a main axis from a large upper end adapted to cooperate with an actuation member of the dual fuel injector to a narrow tip end, said nozzle assembly comprising:

• an elongated body coaxially arranged along said main axis and having a peripheral wall surrounding an inner space which portion proximal the larger upper end defines an upper guiding bore for axially guiding an outer valve member arranged therein, said outer valve member being itself provided with an axial bore in which is axially guided an inner valve member;
• a first fuel conduit comprising said axial bore and extending from an inlet arranged in a large upper end face of the elongated body to a first set of injection holes arranged in the narrow tip end;
• a second fuel conduit comprising said inner space and extending from another inlet arranged in the large upper end face of the elongated body to a second set of injection holes arranged in the narrow tip end;
• and
• an anti-leakage feature comprising a cylindrical tubular sleeve axially extending in said inner space from an upper end attached to the elongated body to a distant lower end, the outer valve member being axially guided through said cylindrical tubular sleeve.
• wherein a first fuel, flows inside the outer valve member and a second fuel flows in the inner space surrounding said outer valve member.