Nozzle for low pressure fuel injection system

• US 5,771,866 A
• Filed: 06/24/1997
• Issued: 06/30/1998
• Est. Priority Date: 06/24/1997
• Status: Expired due to Fees

• Current Assignee: Brunswick Corporation
• Original Assignee: Brunswick Corporation
• Inventors: Staerzl, Richard E.
• Primary Examiner(s): Moulis, Thomas N.
• Application Number:
  US08/881,770
• Time in Patent Office: 371 Days
• Field of Search: 123/531, 123/533, 123/585, 239/416.5, 239/417, 239/423, 239/424, 239/499, 239/432
• US Class Current: 123/531
• CPC Class Codes: F02M 69/044 for injecting into the intake conduit downstream of an air throttle valve
• CPC Class Codes: F02M 69/047 injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles F02M69/325 takes precedence

Abstract

A nozzle is provided for a fuel injection system in which a cap is disposed around a common termination of a first and second conduit. The first and second conduits are associated in coaxial and concentric relation with each other. A liquid fuel is transmitted through the first conduit and air is transmitted through the second conduit. The air is taken into the second conduit at atmospheric pressure without the need for an air compressor. An opening is formed in the cap of the nozzle to allow the fine mist formed at the common termination of the first and second conduit to flow out of the nozzle and into an air stream, such as within an intake manifold, for transport in the air stream to the combustion chamber of a cylinder within the internal combustion engine.

Claims

1. A nozzle, comprising:

a first conduit for conducting a flow of liquid fuel;

a second conduit for conducting a flow of a first gas, said first and second conduits having a common termination at a common location;

a cap disposed over said common termination, said cap having an opening formed therein, said common termination and said cap being arranged to cause said liquid fuel to form a mist within said cap in response to the flow of said first gas from said second conduit; and

a third conduit associated with an internal combustion engine for directing a flow of a second gas into a combustion chamber of said internal combustion engine, said opening formed in said cap being disposed in fluid communication with said third conduit to cause said mist to pass from said cap into said third conduit.

2. The nozzle of claim 1, wherein:

said second conduit is disposed in coaxial and concentric relation around said first conduit.

3. The nozzle of claim 1, wherein:

said first and second conduits being arranged in concentric and coaxial relation with each other.

4. The nozzle of claim 1, wherein:

said first gas is air.

5. The nozzle of claim 4, wherein:

said first gas is air at atmospheric pressure at an entrance of said second conduit.

6. The nozzle of claim 1, wherein:

said second gas is air.

7. The nozzle of claim 1, wherein:

said opening is formed in a side of said cap which requires said first gas and said liquid fuel, as a mist, to turn at an approximately right angle to pass through said opening in said cap after leaving said common termination.

8. The nozzle of claim 1, wherein:

said cap is generally cylindrical with a closed end and an open end, said first and second conduits being disposed in said open end, said common termination being disposed within said cap.

9. The nozzle of claim 1, wherein:

said first conduit is a first tube and said second conduit is a second tube, said first and second tubes being disposed in coaxial and concentric relation with each other.

10. The nozzle of claim 1, wherein:

said liquid fuel is gasoline.

11. A nozzle, comprising:

a first conduit for conducting a flow of liquid fuel;

a second conduit for conducting a flow of a first gas, said first and second conduits having a common termination at a common location, said second conduit being disposed in coaxial and concentric relation around said first conduit;

a cap disposed over said common termination, said cap having an opening formed therein, said common termination and said cap being arranged to cause said liquid fuel to form a mist within said cap in response to the flow of said first gas from said second conduit; and

a third conduit associated with an internal combustion engine for directing a flow of a second gas into a combustion chamber of said internal combustion engine, said opening formed in said cap being disposed in fluid communication with said third conduit to cause said mist to pass from said cap into said third conduit.

12. The nozzle of claim 11, wherein:

said first gas is air at atmospheric pressure at an entrance of said second conduit.

13. The nozzle of claim 11, wherein:

said second gas is air.

14. The nozzle of claim 11 , wherein:

said opening is formed in a side of said cap which requires said first gas and said liquid fuel, as a mist, to turn at an approximately right angle to pass through said opening in said cap after leaving said common termination.

15. The nozzle of claim 11, wherein:

said cap is generally cylindrical with a closed end and an open end, said first and second conduits being disposed in said open end, said common termination being disposed within said cap.

16. The nozzle of claim 11, wherein:

said first conduit is a first tube and said second conduit is a second tube, said first and second tubes being disposed in coaxial and concentric relation with each other.

17. The nozzle of claim 11, wherein:

said liquid fuel is gasoline.

18. A nozzle, comprising:

a first conduit for conducting a flow of liquid fuel;

a second conduit for conducting a flow of a first gas, said first and second conduits having a common termination at a common location, said second conduit being disposed in coaxial and concentric relation around said first conduit;

a cap disposed over said common termination, said cap having an opening formed therein, said common termination and said cap being arranged to cause said liquid fuel to form a mist within said cap in response to the flow of said first gas from said second conduit, said opening being formed in a side of said cap which requires said first gas and said liquid fuel, as a mist, to turn at an approximately right angle to pass through said opening in said cap after leaving said common termination; and

a third conduit associated with an internal combustion engine for directing a flow of a second gas into a combustion chamber of said internal combustion engine, said opening formed in said cap being disposed in fluid communication with said third conduit to cause said mist to pass from said cap into said third conduit, said cap being generally cylindrical with a closed end and an open end, said first and second conduits being disposed in said open end, said common termination being disposed within said cap.

19. The nozzle of claim 18, wherein:

said first gas is air at atmospheric pressure at an entrance of said second conduit;

said liquid fuel is gasoline; and

said second gas is air.

20. The nozzle of claim 18, wherein:

said first conduit is a first tube and said second conduit is a second tube, said first and second tubes being disposed in coaxial and concentric relation with each other.