Patent ID: 8800895
Filing Date: 2014-08-12
Classification: B05B,F02M,F23D

Abstract:
1. A fuel injector apparatus, comprising: a variable area injector arrangement having a pintle and spring operatively connected to an injector housing in such a manner that the spring urges a tip of the pintle to seal against a variable flow orifice of the housing, and such that application of pressurized fuel within the injector housing causes the pintle to move such that the pintle tip is moved out of contact with the variable flow orifice of the housing as a function of the pressure of the pressurized fuel in the injector housing, to thereby provide a corresponding variable area for passage of the pressurized fuel through the variable flow orifice about the tip of the pintle; the pintle further defining a pilot orifice extending through the tip of the pintle for supplying a pilot flow of fuel through the fuel injector apparatus when the pintle tip is sealed against the variable flow orifice; wherein: wherein, the pilot orifice is a simplex nozzle; and wherein, the simplex nozzle comprises a spin chamber disposed upstream of the pilot orifice and the supply conduit includes a portion thereof directed tangentially to the spin chamber.