Fuel injector icing

A fuel injector for liquid phase injection of liquefied gaseous fuels for combustion chambers of an internal combustion engine, the fuel injector comprising a nozzle portion having an end from which gaseous fuel can be delivered through an outlet, the end of the nozzle portion being configured by disposition of the outlet protruding up to 1.5 mm beyond a surface at the end of the nozzle portion surrounding the outlet wherein the surrounding surface is defined by a formation at the end of the nozzle portion, wherein the formation comprises a protrusion on the end of the nozzle portion, and whereby the end of the nozzle portion is hotter than the surrounding surface and the resulting temperature gradient prevents or at least inhibits formation of ice on the end of the nozzle portion upon delivery of gaseous fuel through the outlet.

A fuel injector for liquid phase injection of liquefied gaseous fuels for an internal combustion engine, the fuel injector comprising a nozzle portion having an end from which gaseous fuel can be delivered through an outlet, the nozzle portion comprising an inner tube defining a fluid flow path terminating at the outlet and a casing surrounding the inner tube and defining an end face, the end face having a recess therein defining a surface at the end, adjacent to the outlet, from which gaseous fuel can be delivered surrounding the inner tube, the inner tube protruding beyond the surface by about 0.05 to 0.5 mm whereby the end of the nozzle portion is hotter than the end face of the casing and the resulting temperature gradient prevents or at least inhibits formation of ice thereon upon delivery of gaseous fuel through the outlet.

A fuel injector for liquid phase injection of liquefied gaseous fuels for an internal combustion engine, the fuel injector comprising a nozzle portion having an end from which gaseous fuel can be delivered through an outlet, the nozzle portion comprising an inner tube defining a fluid flow path terminating at the outlet and an outer tube surrounding the inner tube and having an end face with a recess therein defining a surface surrounding the inner tube, the inner tube protruding beyond the end face of the outer tube by about 0.05 to 0.5 mm, wherein the surface surrounding the inner tube is adjacent the outlet and wherein the end of the nozzle portion is hotter than the recess and the resulting temperature gradient prevents or at least inhibits formation of ice on the end of the nozzle portion upon delivery of gaseous fuel through the outlet.

A fuel injector for liquid phase injection of liquefied gaseous fuels for an internal combustion engine, the fuel injector comprising a nozzle portion having an end from which gaseous fuel can be delivered through an outlet, the nozzle portion comprising an inner tube defining a fluid flow path terminating at the outlet and a casing surrounding the inner tube and defining an end face, the end face defining a surface surrounding the inner tube, the inner tube protruding beyond the surface up to about 1.5 mm to prevent or at least inhibit formation of ice thereon upon delivery of gaseous fuel through the outlet, wherein the surface surrounding the inner tube is adjacent the outlet and wherein the end of the nozzle portion is hotter than the surface and the resulting temperature gradient prevents or at least inhibits formation of ice on the end of the nozzle portion upon delivery of gaseous fuel through the outlet.

A fuel injector for liquid phase injection of liquefied gaseous fuels for an internal combustion engine, the fuel injector comprising a nozzle portion having an end from which gaseous fuel can be delivered through an outlet, the nozzle portion comprising an inner tube defining a fluid flow path terminating at the outlet and an outer tube surrounding the inner tube and having an end face defining a surface surrounding the inner tube, the inner tube protruding beyond the end face of the outer tube up to about 1.5 mm, wherein the surface surrounding the inner tube is adjacent the outlet and wherein the end of the nozzle portion is hotter than the surface and the resulting temperature gradient prevents or at least inhibits formation of ice on the end of the nozzle portion upon delivery of gaseous fuel through the outlet.