Airblast fuel injector
AssigneeFuel Systems Textron Inc.
InventorRobert M. Halvorsen
Life of this patent
Estimating the term…
Abstract
An airblast fuel injector tip is provided for reducing fuel vaporization problems as a result of high fuel temperatures without adversely affecting the airblast operational characteristics of the injector tip. The injector tip includes a fuel receiving chamber and an arcuate valve member movable relative to a valve seat member having a fuel discharge port for discharging fuel flow into the fuel receiving chamber as metered by said valve member in dependence on the pressure of fuel. The valve member comprises an arcuate reed-type valve received in a generally cylindrical tubular valve seat insert with the flow area of the fuel discharge port adjustable externally of the valve seat insert for adjusting the valve cracking pressure.
Claims9
An airblast fuel injector having a longitudinal axis and comprising injector body means for forming about said axis an inner air chamber with a downstream inner air discharge orifice, an outer air chamber with a downstream outer air discharge orifice and a fuel chamber with a downstream fuel discharge orifice between the inner and outer air discharge orifices, an arcuate valve seat disposed in the fuel chamber, said valve seat including a fuel bore extending transversely of said axis and terminating in a fuel discharge port, and an arcuate spring valve disposed on said arcuate valve seat and having a free end portion overlying the fuel discharge port and biased against said valve seat over the fuel discharge port when the fuel pressure is below a minimum selected value and openable in a direction transverse to said axis when fuel pressure exceeds the selected value to allow fuel discharge from the fuel discharge port to the fuel chamber.
Dependencies are inferred from the claim text.