ARRANGEMENT AND METHOD FOR PREVENTING CARBON FORMATION IN SPRAY GUIDING STRUCTURES

摘要

Method for preventing carbon build-up on fuel spray guiding surfaces proximate a nozzle of a fuel injector. Liquid fuel handling surfaces of the fuel injector can remain cool while providing very hot surfaces to burn off carbon particles before carbon deposits can build up and change the spray characteristics. In the method, a spray guiding structure guides the fuel spray after exiting from the fuel injector and a deflector member is arranged around the injector body. The spray guiding structure is thermally insulated from the fuel injector, and this thermal insulation enables the spray guiding structure to be heated to a temperature above about 900° F. to prevent build up of carbon thereon.

主权项

1. A fuel injection arrangement for an engine, comprising;
a fuel injector having an injector body and a valve body and configured to inject fuel in spray form into a combustion chamber in the engine; a spray guiding structure that guides the fuel spray after exiting from said fuel injector; and a deflector member arranged around at least a part of said injector body, said spray guiding structure being thermally insulated from said fuel injector, whereby the thermal insulation of said spray guiding structure from said fuel injector enables said spray guiding structure to be heated to a temperature above about 900° F. to prevent build up of carbon on said spray guiding structure.