Patent ID: 7849693

Claim:
A fuel injector for a gas turbine engine combustion chamber, comprising: a first fuel supply line for running at idle speed; a second fuel supply line for running at speeds up to full throttle; an annular distributor-forming portion with an axis XX; a plate provided at an end of the annular distributor-forming portion which is perpendicular to the axis XX; and a premixing component which is mounted on the annular distributor-forming portion, the premixing component including a sleeve portion and a screen-forming plate which is perpendicular to the axis XX, wherein a plurality of first injection orifices, n1, and a plurality of second injection orifices, n2, which communicate with the first and second supply lines, respectively, are disposed in a ratio n1/n2<1 in the plate provided at the end of the annular distributor-forming portion, the first and second injection orifices are arranged in a ring at a predetermined radial distance from the axis XX, the first orifices occupying one sector of said ring, wherein premixing orifices are disposed in the screen-forming plate of the premixing component, the premixing orifices are arranged in a first ring at a radial distance less than the predetermined radial distance from the axis XX and a second ring at a radial distance greater than the predetermined radial distance from the axis XX.