Patent ID: 9309848
Filing Date: 2016-04-12
CPC Classification: F01N,F02M,Y02T

Claim Text:
1. A spray nozzle, comprising: a) an inlet housing including a fuel inlet, wherein the inlet housing defines an interior space and is configured to thermally isolate the interior space from external conditions during operation and to reduce heat soak back from the inlet housing to the interior space thereof after operation; b) a fuel conduit mounted in the interior space of the inlet housing in fluid communication with the fuel inlet for providing fuel to a spray nozzle mounted to the fuel, conduit; and c) a cooling air jacket mounted to the inlet housing outboard of the fuel conduit and spray nozzle for conducting a flow of cooling air to nozzle tip region proximate an outlet end of the spray nozzle wherein the cooling air jacket is configured to thermally isolate inboard components from exterior conditions, to provide clean air during operation to the nozzle tip region for diluting carbon to reduce carbon deposits on the spray nozzle and for cooling the same, and to conduct air for passive cooling of the nozzle tip region after operation, wherein the fuel conduit is a first fuel conduit, wherein the spray nozzle is a first spray nozzle, wherein the fuel inlet is a first fuel stage inlet, wherein the inlet housing includes a second fuel stage inlet, and further comprising a second fuel conduit mounted in the interior space of the inlet housing outboard of the first fuel conduit and in fluid communication with the second fuel stage inlet for providing fuel to a second spray nozzle mounted outboard of the first spray nozzle.