Claims
- 1. An air fuel injector for injecting fuel and air into a high pressure area of an internal combustion engine comprising a housing defining a chamber, a nozzle port for communicating said chamber with the high pressure air of the engine, an injector valve for opening and closing said nozzle port and the communication of said chamber with said high pressure area, a fuel injector for injecting fuel into said chamber at least during the time when said injector valve is open, and means for restricting the communication of the area between said nozzle port and said injection valve, when open, with the area of said chamber to which fuel is injected by said fuel injector at least when said injector valve is opened and when said fuel injector is injecting fuel.
- 2. An air fuel injector as set forth in claim 1 wherein the means for restricting the communication comprises an orifice.
- 3. An air fuel injector as set forth in claim 2 wherein the orifice is defined at least in part by a portion of the injector valve.
- 4. An air fuel injector as set forth in claim 3 wherein the orifice is further defined by the portion of the injector valve and a portion of the housing defining the chamber.
- 5. An air fuel injector as set forth in claim 4 wherein the injector valve comprises a poppet type valve having a head portion controlling the flow through the nozzle port and a stem portion connected to an actuator and defining at least in part the orifice.
- 6. An air fuel injector as set forth in claim 5 further including means for delivering air to the chamber upstream of the orifice from the nozzle port.
- 7. An air fuel injector as set forth in claim 5 wherein the orifice is positioned in confronting relationship to the point of discharge of the fuel injector into the chamber.
- 8. An air fuel injector as set forth in claim 2 further including means for delivering air to the chamber upstream of the orifice from the nozzle port.
- 9. An air fuel injector as set forth in claim 2 wherein the orifice is positioned in confronting relationship to the point of discharge of the fuel injector into the chamber.
- 10. An air fuel injector as set forth in claim 8 wherein the injector valve comprises a poppet valve having a reduced diameter stem portion with a configured part for slideably supporting said injector valve for reciprocation within the housing while permitting flow past said configured portion.
- 11. An air fuel injector as set forth in claim 10 wherein the orifice is formed downstream of the configured portion of the valve stem and wherein the fuel is delivered downstream of the configured end of the valve stem portion.
- 12. An air fuel injector as set forth in claim 10 wherein the orifice is formed downstream of the configured portion of the valve stem and wherein the fuel is delivered downstream of the configured end of the valve stem portion.
- 13. An air fuel injector as set forth in claim 1 wherein the injector valve comprises a poppet valve having a reduced diameter stem portion with a configured part for slideably supporting said injector valve for reciprocation within the housing while permitting flow past said configured portion.
- 14. An air fuel injector as set forth in claim 13 wherein the orifice is formed downstream of the configured portion of the valve stem and wherein the fuel is delivered downstream of the configured end of the valve stem portion.
- 15. An air fuel injector as set forth in claim 13 wherein the orifice is formed downstream of the configured part of the valve stem and wherein the fuel is delivered downstream of the configured part of the valve stem portion.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-75309 |
Mar 1990 |
JP |
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Parent Case Info
This is a continuation of U.S. patent application Ser. No. 07/675,793, filed Mar. 27, 1991 which application is a continuation in part application Ser. No. 07/672,888 filed Mar. 21, 1991.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4499861 |
Wiegand et al. |
Feb 1985 |
A |
4499871 |
Neitz et al. |
Feb 1985 |
A |
4753213 |
Schlunke et al. |
Jun 1988 |
A |
Continuations (1)
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Number |
Date |
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Parent |
07/675793 |
Mar 1991 |
US |
Child |
07/895203 |
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US |
Continuation in Parts (1)
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Number |
Date |
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Parent |
07/672888 |
Mar 1991 |
US |
Child |
07/675793 |
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US |