Claims
- 1. A fuel injector comprising:an injector body defining a nozzle supply passage and a nozzle outlet; a reverse flow valve member positioned in the injector body and including an opening hydraulic surface exposed to fluid pressure in an upper portion of the nozzle supply passage, and being moveable between a closed position in which the nozzle supply passage is blocked, and an open position in which the nozzle supply passage is open; a compressed spring operably positioned to bias the reverse flow valve member toward the closed position; the injector body defines a guide bore; the reverse flow valve member being positioned in the guide bore and having a guide clearance in the guide bore; an interaction between the reverse flow valve member and the injector body, and being operable to prevent the reverse flow valve member from rotating with respect to the injector body.
- 2. The fuel injector of claim 1 wherein the interaction includes a pin in contact with the injector body and the reverse flow valve member.
- 3. A fuel injector comprising:an injector body defining a nozzle outlet and including a barrel in contact with a stop component; a reverse flow valve member trapped between the barrel and the stop component, and being movable between a first position and a second position; a movable plunger at least partially positioned in the barrel; a nozzle supply passage, which includes a fuel pressurization chamber, being defined by the injector body, the plunger and the reverse flow valve member; the fuel pressurization chamber being fluidly connected to a lower portion of the nozzle supply passage when the reverse flow valve member is in the second position; a compressed spring operably positioned in the injector body to bias the reverse flow valve member toward the first position, in which the fuel pressurization chamber is blocked from the lower portion of the nozzle supply passage; the barrel includes a valve seat; the reverse flow valve member being in contact with the valve seat when in the first position.
- 4. The fuel injector of claim 3 wherein the reverse flow valve member being moveable along a line parallel to a centerline of the plunger.
- 5. The fuel injector of claim 4 wherein the reverse flow valve member defines a groove that fluidly connects the plunger bore to the nozzle supply passage when in the second position.
- 6. The fuel injector of claim 4 including an interaction between the reverse flow valve member and the injector body, and being operable to prevent the reverse flow valve member from rotating with respect to the injector body.
- 7. The fuel injector of claim 6 wherein the interaction includes a pin in contact with the injector body and the reverse flow valve member.
- 8. A method of reducing gas ingestion in a fuel injector, comprising the step of:moving a non-spherical reverse flow valve member at least in part with a spring to a position that blocks a downstream portion of a nozzle supply passage to an upstream portion of the nozzle supply passage; and wherein the moving step includes a step of moving the reverse flow valve member into contact with a barrel.
- 9. The method of claim 8 including a step of moving a stop surface of a nozzle outlet valve member out of contact with a stop component.
- 10. The method of claim 9 includes a step of moving the nozzle outlet valve member to a closed position.
RELATION TO OTHER PATENT APPLICATION
This application is a continuation of application Ser. No. 10/029,411, filed Dec. 20, 2001, which is now abandoned.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
Country |
Parent |
10/029411 |
Dec 2001 |
US |
Child |
10/125262 |
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US |