Injector for gaseous fuel
AssigneeBorgWarner Luxembourg Automotive Systems SA
InventorManfred KOLKMAN
Life of this patent
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Abstract
A fuel injector suitable for gaseous fuels comprises an injection nozzle having a tip region that is shaped to define a valve seat that extends about a central outlet opening and an outward opening injection needle slidably received in the injection nozzle. A nozzle cap is received over the tip region of the injection nozzle, wherein the tip region and the nozzle cap are configured to define an thermal barrier layer between them to reduce thermal transfer. The nozzle cap is releasably clipped onto the tip region. It comprises a slot and is configured to be compressible in a radial direction so as to reduce its outer diameter.
Claims11
A fuel injector suitable for gaseous fuels, comprising:
- an injection nozzle having a tip region that is shaped to define a valve seat that extends about a central outlet opening;
- and
- an outward opening injection needle slidably received in the injection nozzle;
- wherein the injection nozzle further includes a nozzle cap that is received over the tip region of the injection nozzle, wherein the tip region and the nozzle cap are configured to define an thermal barrier layer between them to reduce thermal transfer;
- wherein the nozzle cap and the tip region of the injection nozzle are configured so that the nozzle cap is releasably clipped onto the tip region;
- wherein the nozzle cap is configured to be compressible in a radial direction so as to reduce its outer diameter;
- and
- wherein the nozzle cap comprises a slot that extends from a first end to a second end.
The fuel injector of wherein the thermal barrier layer is defined by a radial clearance between an outer surface of the tip region of the nozzle and an inner surface of the nozzle cap.
Dependencies are inferred from the claim text.