The invention comprises a fluid injector including a discharge passage, and a tip sealing valve for controlling fluid discharge through said passage, said tip sealing valve being responsive to a fluid differential operative thereon in a non-discharge condition of the fluid injector to close said discharge passage, said tip sealing valve being responsive to another fluid differential operative thereon in a discharge condition of said fluid injector to permit fluid discharge through said discharge passage, said tip sealing valve comprising first and second relatively movable parts with a spring means interposed between said parts, said first part having a cross-sectional area effective to the pressure of fluid flowing in said fluid injector in the non-discharge condition thereof such that said first part will be seated in closure relationship with said discharge passage, and said second part being responsive to the pressure of said fluid in said fluid flow to compress said spring means against said seated first part, by which the force with which said first part is seated is a function of said fluid pressure effective cross-sectional area of said first part and the rating of said spring means.
The invention comprehends a fluid injector comprising a liquid supply path to discharge passage means, a liquid return path for liquid supplied through the liquid supply path but not discharged through the discharge passage means, and a gaseous supply path to the discharge passage means and having a region in common with the liquid supply path, by which effecting a variation as between the liquid and gaseous pressures in said region will result in variation in the discharge of liquid from the fluid injector.
The present invention relates to a method and apparatus for supplying fuel to and cooling a fuel injector of a gas turbine engine having a dual head combustion chamber. The method comprises the steps of supplying a total fuel flow to the fuel injector such that at least a portion of the total fuel flow circulates through the high power injector nozzle during all operational modes of the gas turbine engine, including those modes in which the high power injector is not supplying fuel to the combustion chamber, and evacuating unused fuel from the high power injector. The apparatus includes a fuel supply conduit connected to the high power injector to supply at least a portion of the total fuel flow supplied to the fuel injector to the high power injector during all operational modes of the gas turbine engine; a fuel control valve to control the amount of fuel flowing through the fuel injector orifices; and a fuel evacuation conduit connected to the high power injector so as to evacuate unused fuel from the high power injector.
3831858 - VENTED PLUNGER ATOMIZER - Owned by The United States of Ameria as represented by the Secretary of the Navy (Washington, DC)
Fluid pressure in a variable volume whirl chamber exerts a force that posons a spring biased piston. The positioning of the piston determines the amount of fuel oil supplied to a ship's boiler by an arrangement of ports in a whirl chamber cartridge. The cartridge provides an enclosure for the whirl chamber, a piston and a biasing spring. The fuel is delivered axially along the outside of the cartridge through the ports to the whirl chamber and out an orifice located at the forward end of the whirl chamber.
An injection valve for the injection of fuel during a low pressure phase into a space subjected to pressure fluctuations, which includes an injection nozzle equipped with a nozzle seat that is provided with at least one nozzle aperture; the nozzle aperture is adapted to be covered off by a nozzle needle which is adapted to be lifted and is limited in its lifting movement by an abutment at least in its opening direction; the nozzle seat is thereby movable in the lifting direction of the nozzle needle.
There is disclosed an injector for a fuel injection system for an internal combustion engine and comprising a nozzle body formed with a compartment within which there is positioned a nozzle needle biased towards a closed position by a spring. A first chamber is formed between the valve seat and one end of a guide for the nozzle needle and a second chamber is formed at the other end of said guide, the arrangements being such that fuel under pressure is supplied to both said chambers simultaneously and that the nozzle needle is seated until the pressure in said second chamber is relieved by opening of a trigger valve under increasing fuel supply pressure to cause the nozzle needle to move to open the injection valve for the supply of fuel to the engine.
