Fuel injector
AssigneePhinia Delphi Luxembourg Sarl
InventorMichael Peter Cooke
Life of this patent
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Abstract
An injection nozzle for an internal combustion engine, comprising a nozzle body defining a nozzle body bore, a blind end region of which defines a set of nozzle outlets. An injection valve needle is slidably received in the nozzle body bore and engageable with a seating arrangement to control fuel flow. The seating arrangement includes a seating insert received in the nozzle body bore and positioned upstream of the nozzle outlets, the seating insert defining an upper valve seat. The injection valve needle comprises a first seating portion and a second seating portion which are axially spaced along the injection valve needle. The first seating portion is engageable with the upper valve seat defined by the seating insert; and the second seating portion is engageable with a lower valve seat defined by the nozzle body bore.
Claims15
An injection nozzle for an internal combustion engine, the injection nozzle comprising:
- a nozzle body defining a nozzle body bore, a blind end region of which defines a set of nozzle outlets;
- an injection valve needle-slidable in the nozzle body bore and engageable with a seating arrangement to control fuel flow through the set of nozzle outlets;
- wherein the seating arrangement includes a seating insert received in the nozzle body bore and positioned upstream of the nozzle outlets, the seating insert defining an upper valve seat;
- the injection valve needle comprising a first seating portion and a second seating portion which are axially spaced along the injection valve needle;
- wherein the first seating portion is engageable with the upper valve seat defined by the seating insert;
- and wherein the second seating portion is engageable with a lower valve seat defined by the nozzle body bore,
- and wherein the seating insert defines at least in part a first flow path for fuel to travel from the upper seating surface to the set of nozzle outlets, when the first seating portion is disengaged therefrom to commence a fuel injection event.
Dependencies are inferred from the claim text.