Patent ID: 7766251

Claim:
A fuel injection system, comprising: a) an injector body having a fuel inlet and a fuel outlet, and defining a fuel flow path therebetween, the fuel flow path having: i) a generally helical flow passage having an inlet end portion disposed proximate the fuel inlet of the injector body; ii) an expansion chamber downstream from and in fluid communication with the helical flow passage, wherein an outlet end portion of the helical flow passage is connected to the expansion chamber by way of at least one feed hole, and iii) a fuel delivery device in fluid communication with the expansion chamber for delivering fuel; and b) elongated heating means extending along an axial length of the injector body, the helical flow passage surrounding the heating means, the heating means being in thermal communication with the injector body, the heating means adapted and configured for maintaining the injector body at a predetermined temperature to heat fuel traversing the flow path.