Fuel injector

Patent metadata

Field	Value
Publication number	US-9850869-B2
Application number	US-201313947226-A
Country	US
Kind code	B2
Filing date	Jul 22, 2013
Priority date	Jul 22, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A fuel injector for supplying fuel to a fuel consuming devise includes a fuel inlet for receiving the fuel, a nozzle tip for dispensing the fuel from the fuel injector, a conduit for communicating the fuel from the fuel inlet to the nozzle tip, a valve seat, and a valve selectively seatable and unseatable with the valve seat for selectively preventing and permitting fuel flow out of the nozzle tip. The nozzle tip includes a non-circular recess on a downstream side thereof and a metering hole on an upstream side thereof opening into the non-circular recess to allow fuel to exit the nozzle tip, the metering hole having a smaller area than the non-circular recess.

First claim

We claim:

1. A fuel injector for supplying fuel to a fuel consuming device, said fuel injector comprising:
a fuel inlet for receiving fuel;
a nozzle tip for dispensing fuel from said fuel injector;
a conduit for communicating fuel from said fuel inlet to said nozzle tip;
a valve seat; and
a valve member selectively seatable and unseatable with said valve seat for selectively preventing and permitting fuel to flow from said fuel inlet out of said nozzle tip;
wherein said nozzle tip comprises a non-circular recess on a downstream side thereof and a plurality of metering holes on an upstream side thereof opening into said non-circular recess to allow fuel to exit said nozzle tip, said plurality of metering holes having a smaller area than said non-circular recess, wherein said non-circular recess in an arc-shaped recess,
wherein said nozzle tip further comprises a plurality of circular recesses on said downstream side thereof and a plurality of circular metering holes on an upstream side thereof such that each one of said plurality of circular metering holes opens into a respective one of said plurality of circular recesses to allow fuel to exit said nozzle tip, each one of said plurality of circular metering holes having a smaller area than each one of said plurality of circular recesses; and
wherein said valve member reciprocates along a fuel injector axis and said arc-shaped recess is centered on a circular centerline which is centered about said fuel injector axis.

2. A fuel injector as in claim 1 wherein each one of said plurality of circular recesses is centered on said circular centerline.

3. A fuel injector as in claim 1 wherein each one of said plurality of circular recesses are stepped.

4. A fuel injector for supplying fuel to a fuel consuming device, said fuel injector comprising:
a fuel inlet for receiving fuel;
a nozzle tip for dispensing fuel from said fuel injector;
a conduit for communicating fuel from said fuel inlet to said nozzle tip;
a valve seat; and
a valve member selectively seatable and unseatable with said valve seat for selectively preventing and permitting fuel to flow from said fuel inlet out of said nozzle tip;
wherein said nozzle tip comprises a non-circular recess on a downstream side thereof and a plurality of metering holes on an upstream side thereof opening into said non-circular recess to allow fuel to exit said nozzle tip, said plurality of metering holes having a smaller area than said non-circular recess; and
wherein said non-circular recess is one of a plurality of non-circular recesses and said plurality of metering holes is a first plurality of metering holes and each one of said plurality of non-circular recesses includes a respective plurality of metering holes which opens thereinto to allow fuel to exit said nozzle tip.

5. A fuel injector as in claim 4 wherein each one of said plurality of non-circular recesses is arc-shaped.

6. A fuel injector as in claim 5 wherein said valve member reciprocates along a fuel injector axis and each one of said plurality of non-circular recesses are centered on a circular centerline which is centered about said fuel injector axis.

7. A fuel injector as in claim 6 wherein each one of said plurality of metering holes is centered on said circular centerline.

8. A fuel injector as in claim 5 wherein each one of said plurality of non-circular recesses is stepped.

9. A fuel injector as in claim 6 wherein said plurality of non-circular recesses is a first plurality of non-circular recesses and said circular centerline is a first circular centerline; said nozzle tip further comprising:
a second plurality of recesses on a downstream side thereof and a second plurality of metering holes on an upstream side thereof such that each one of said plurality of metering holes opens into a respective one of said second plurality of recesses to allow fuel to exit said nozzle tip;
wherein each one of said second plurality of recesses are centered on a second circular centerline which is concentric with said first circular centerline.

10. A fuel injector as in claim 9 wherein each one of said second plurality of metering holes is centered on said second circular centerline.

11. A fuel injector as in claim 9 wherein said second circular centerline is radially inward of said first circular centerline.

12. A fuel injector as in claim 9 wherein each one of said second plurality of recesses is radially aligned with a respective space which separates adjacent ones of said first plurality of non-circular recesses.

13. A fuel injector as in claim 9 wherein each one of said second plurality of recesses is arc-shaped.

14. A fuel injector as in claim 9 wherein each one of said second plurality of recesses is circular.

15. A fuel injector as in claim 9 wherein each one of said first plurality of non-circular recesses is stepped.

16. A fuel injector as in claim 9 wherein each one of said second plurality of recesses is stepped.

17. A fuel injector for supplying fuel to a fuel consuming device, said fuel injector comprising:
a fuel inlet for receiving fuel;
a nozzle tip for dispensing fuel from said fuel injector;
a conduit for communicating fuel from said fuel inlet to said nozzle tip;
a valve seat; and
a valve member selectively seatable and unseatable with said valve seat for selectively preventing and permitting fuel to flow from said fuel inlet out of said nozzle tip;
wherein said nozzle tip comprises an arc-shaped recess on a downstream side thereof and a metering hole on an upstream side thereof opening into said arc-shaped recess to allow fuel to exit said nozzle tip, said metering hole having a smaller area than said arc-shaped recess;
wherein said arc-shaped recess is one of a plurality of arc-shaped recesses and said metering hole is one a plurality of metering holes such that each one of said plurality of metering holes opens into a respective one of said arc-shaped recess to allow fuel to exit said nozzle tip;
wherein said valve member reciprocates along a fuel injector axis and each one of the plurality of arc-shaped recesses are centered on a circular centerline which is centered about said fuel injector axis and each one of said plurality of metering holes is centered on said circular centerline;
wherein said plurality of arc-shaped recesses is a first plurality of arc-shaped recesses, said plurality of metering holes is a first plurality of metering holes, and said circular centerline is a first circular centerline; said nozzle tip further comprising a second plurality of recesses on a downstream side thereof and a second plurality of metering holes on an upstream side thereof such that each one of said plurality of metering holes opens into a respective one of said second plurality of recesses to allow fuel to exit said nozzle tip; and
wherein each one of said second plurality of recesses are centered on a second circular centerline which is concentric with said first circular centerline.

Assignees

• Delphi Tech Inc

Inventors

• Raney Michael R
• Varble Daniel L
• Berndorfer Axel H
• Breuer Stephan
• Zizelman James

Classifications

• F02M61/1886

  Details of valve seats not covered by groups F02M61/1866 - F02M61/188 · CPC title

• F02M61/1866

  Valve seats or member ends having multiple cones · CPC title

• F02M61/1806 Primary

  characterised by the arrangement of discharge orifices, e.g. orientation or size · CPC title

• F02M61/1853

  Orifice plates · CPC title

• F02M61/1846

  Dimensional characteristics of discharge orifices · CPC title