Method of fuel injection
AssigneeOrbital Engine Company Proprietary Limited
InventorsMichael L. McKay, Ian R. Thompson, Ralph T. Sarich
Life of this patent
Estimating the term…
Abstract
A method of injecting liquid fuel to an engine which includes delivering a quantity of fuel into a conduit and propelling the fuel along the conduit by a pulse of gas under sufficient pressure to discharge the fuel from an open nozzle into an engine induction passage, or combustion chamber. The pressure and quantity of gas are preferably sufficient to cause the fuel to issue from the nozzle at or near sonic speed. The duration of the pulse of gas may be varied with a variation in the quantity of fuel to improve the fuel metering accuracy with engine load changes.
Claims17
A method of delivering liquid fuel to an internal combustion engine comprising the steps of:
- delivering individual metered quantities of liquid fuel into a conduit communicating with a fixed size constantly open nozzle;
- admitting an individual quantity of gas to said conduit immediately upstream of each metered quantity of fuel at a pressure and for a period sufficient to propel the preceding metered quantity of fuel to and discharge the fuel through said nozzle to the engine as an independent fuel pulse, said quantity of fuel in said fuel pulse being independent of the period of admission of gas.
A method of delivering pulses of metered quantities of liquid fuel to an internal combustion engine, comprising the steps of:
- filling a chamber with fuel, the chamber having a selectively openable discharge port in communication therewith and with a conduit terminating in a fixed size constantly open nozzle;
- admitting gas to said chamber to displace a fuel pulse from the chamber upon opening of the discharge port;
- continuing the supply of gas to the chamber at a pressure to propel the fuel along the conduit and discharge the fuel through the nozzle;
- and
- controlling the quantity of fuel displaceable by the admission of said gas to the chamber, said quantity of fuel in said fuel pulse being independent of the period of admission of gas.
Apparatus for delivering pulses of liquid fuel to an internal combustion engine comprising:
- a conduit, a fixed size constantly open nozzle in communication with said conduit, fuel means for delivering an individually metered quantity of fuel into the conduit, and gas means for admitting an individual quantity of gas to the conduit upstream of the fuel at a pressure and for a period sufficient to propel the fuel through said conduit and discharge the fuel from said nozzle as an independent pulse, said quantity of fuel in said pulse being independent of the period of admission of gas.
Dependencies are inferred from the claim text.