Common rail system with pressure amplification
AssigneeContinental Automotive Systems US, Inc.
InventorUlrich Augustin
Life of this patent
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Abstract
A fuel system includes a fuel rail that communicates fuel at a first pressure through a fuel amplifier to a fuel injector. The fuel pressure amplifier increases the pressure from the first pressure to a second pressure. The second pressure is higher than the first pressure and is communicated through each of the plurality of fuel injectors. The fuel amplifiers provide for the application of fuel pressure without the need to configure each and every fuel system component for the corresponding higher pressures.
Claims18
A fuel system comprising:
- a fuel rail containing fuel at a first pressure;
- a pressure amplifier that receives fuel from the fuel rail at the first pressure and increases the received fuel to a second pressure greater than the first pressure responsive to fuel flow therethrough;
- and
- at least one fuel injector receiving fuel at the second pressure from the pressure amplifier, the at least one fuel injector including an actuator for moving a needle valve for selectively blocking an outlet of the fuel injector, wherein the pressure amplifier receives fuel from the fuel rail responsive to the needle valve being moved by the actuator to a position not blocking the outlet.
A fuel amplifier assembly for a fuel system comprising:
- a housing defining a fuel inlet, a fuel outlet and an exhaust;
- a high pressure plunger movable within a high pressure chamber;
- and
- a valve movable responsive to fuel flow out through the fuel outlet for driving the high pressure plunger into the high pressure chamber to increase fuel pressure communicated to a fuel injector.
A fuel system comprising:
- a fuel rail containing fuel at a first pressure;
- a pressure amplifier that receives fuel from the fuel rail at the first pressure and increases the received fuel to a second pressure greater than the first pressure responsive to fuel flow therethrough, the pressure amplifier including a high pressure chamber, a high pressure plunger driven into the high pressure chamber to increase fuel pressure to the second pressure by an intensifier piston selectively controlled by a valve, wherein the valve is movable responsive to fuel flow through an outlet of the pressure amplifier;
- and
- at least one fuel injector receiving fuel at the second pressure from the pressure amplifier.
Dependencies are inferred from the claim text.