IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0368556
(2006-03-06)
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등록번호 |
US-7500464
(2009-03-10)
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발명자
/ 주소 |
- Rock,Kelly P.
- Nadeau, Jr.,Bruce E.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
9 |
초록
▼
The present invention provides a diesel engine and methods and apparatus for premixing diesel fuel and oxidant for combustion. The methods and apparatus may include a two stage vortex, each stage accommodating different flow rate ranges. The vortex pulverizes diesel fuel and optimally mixes the dies
The present invention provides a diesel engine and methods and apparatus for premixing diesel fuel and oxidant for combustion. The methods and apparatus may include a two stage vortex, each stage accommodating different flow rate ranges. The vortex pulverizes diesel fuel and optimally mixes the diesel fuel with an oxidant prior to introduction into a combustion chamber. The premixing results in more complete combustion and, consequently, fuel efficiency is increased and pollution is decreased.
대표청구항
▼
What is claimed is: 1. A method of providing fuel to a diesel engine, comprising: fueling a diesel engine, the fueling comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, the first pre-combustion vortex chamber having a general
What is claimed is: 1. A method of providing fuel to a diesel engine, comprising: fueling a diesel engine, the fueling comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, the first pre-combustion vortex chamber having a generally cylindrical shape with a periphery and a central axis, wherein creating the gaseous, homogenous premixture includes supplying the oxidizer along the periphery and supplying the diesel fuel along the central axis into the oxidizer; introducing the gaseous, homogenous premixture of diesel fuel and oxidizer from the first pre-combustion vortex chamber into a combustion chamber. 2. A method of providing fuel to a diesel engine according to claim 1, further comprising minimizing shockwaves in the combustion chamber. 3. A method of providing fuel to a diesel engine according to claim 1, further comprising preventing shockwaves in the combustion chamber. 4. A method of providing fuel to a diesel engine according to claim 1, further comprising igniting the gaseous, homogenous premixture of diesel fuel and oxidizer in the ignition chamber with an ignition source. 5. A method of providing fuel to a diesel engine according to claim 1 wherein the creating a gaseous, homogenous premixture of diesel fuel and oxidizer comprises: creating an oxidizer vortex about the central axis in the first pre-combustion vortex chamber; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer at an axial area of the first pre-combustion vortex chamber. 6. A method of providing fuel to a diesel engine according to claim 1 wherein the creating a gaseous, homogenous premixture of diesel fuel and oxidizer comprises: creating an oxidizer vortex about the central axis in the first pre-combustion vortex chamber; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer; wherein the creating an oxidizer vortex comprises introducing the oxidizer into the first pre-combustion vortex chamber at a non-tangential, non-radial angle through multiple fluid passageways along the periphery of the first pre-combustion vortex chamber. 7. A method of providing fuel to a diesel engine according to claim 1 wherein the creating a gaseous, homogenous premixture of diesel fuel and oxidizer comprises: providing a primary stage oxidizer introduction path; providing a secondary stage oxidizer introduction path; opening a valve in the secondary stage oxidizer introduction path upon reaching a predetermined oxidizer requirement threshold; creating an oxidizer vortex in a second pre-combustion vortex chamber with fluid flow from the secondary stage oxidizer introduction path; introducing diesel fuel at an axis of the oxidizer vortex; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer. 8. A method of providing fuel to a diesel engine according to claim 1 wherein the creating a gaseous, homogenous premixture of diesel fuel and oxidizer comprises: providing a primary stage oxidizer introduction path; providing a secondary stage oxidizer introduction path; opening a valve in the secondary stage oxidizer introduction path upon reaching a predetermined oxidizer requirement threshold and holding open a valve in the primary stage oxidizer introduction path; creating an oxidizer vortex in a second pre-combustion vortex chamber with fluid flow from the secondary stage oxidizer introduction path; introducing diesel fuel at an axis of the oxidizer vortex; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer. 9. A method of providing fuel to a diesel engine according to claim 1, further comprising varying an air-to-fuel ratio of the gaseous, homogenous premixture of diesel fuel based on engine speed and engine load. 10. A method of running an engine, comprising: operating a diesel engine, the operating comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, the first pre-combustion vortex chamber having a generally cylindrical shape with a periphery and central axis, wherein creating the gaseous, homogenous premixture includes supplying the oxidant along the periphery to create an oxidant vortex and supplying the diesel fuel along the central axis into the oxidant vortex; flowing the gaseous, homogenous premixture of diesel fuel and oxidizer into a combustion cylinder of the diesel engine; compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the combustion cylinder with a piston at a ratio of at least about 15:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer; igniting the compressed gaseous, homogenous premixture of diesel fuel and oxidizer with a spark generating member. 11. A method of running an engine according to claim 10 wherein the igniting comprises creating a spark with a spark plug in the cylinder. 12. A method of running an engine according to claim 10, further comprising compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of greater than 21:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer. 13. A method of running an engine according to claim 10, further comprising compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least 25:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer. 14. A method of running an engine according to claim 10 wherein the creating a gaseous, homogenous premixture of diesel fuel and oxidizer comprises maintaining a combustible mixture while reducing the diesel fuel to an average particle size such that compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least 25:1 does not cause auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer. 15. A method of running an engine according to claim 10, further comprising compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least 30:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer. 16. A method of running an engine according to claim 10, further comprising compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least 40:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer. 17. A method of running an engine according to claim 10, further comprising varying an air-to-fuel ratio of the gaseous, homogenous premixture of diesel fuel based on engine speed and engine load. 18. A method of providing fuel to a diesel engine, comprising: fueling a diesel automobile, the method further comprising: premixing diesel fuel with an oxidant in a pre-combustion vortex chamber, the pre-combustion vortex chamber having a generally cylindrical shape with a periphery and a central axis, the premixing comprising supplying the oxidant to the pre-combustion vortex chamber through a plurality of openings along the periphery to create a oxidant vortex, and introducing diesel fuel into the oxidant vortex along the central axis to create a premixed diesel fuel and oxidant mixture; inputting the premixed diesel fuel and oxidant mixture into a combustion chamber of the automobile without forcing additional diesel fuel into the combustion chamber. 19. A method of providing fuel to a diesel engine according to claim 18 wherein the premixing comprises: providing first and second vortex chambers in series, wherein the first vortex chamber only or both the first and second vortex chambers receive a supply of oxidant, wherein the oxidant enters the first and second vortex chambers at an angle and creates the oxidant vortex; providing a fuel injector and injecting diesel fuel axially along the central axis into the oxidant vortex created by either one of the first or second vortex chambers. 20. A method of providing fuel to a diesel engine according to claim 18 wherein the premixing comprises centering the oxidant vortex about the central axis and holding the oxidant vortex. 21. A method of providing fuel to a diesel engine according to claim 18 further comprising evenly distributing the premixed diesel fuel and oxidant into a manifold prior to inputting the premixed diesel fuel and oxidant mixture into the combustion chamber. 22. A method of providing fuel to a diesel engine, comprising: fueling a diesel engine, the fueling comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, wherein creating the gaseous, homogenous premixture of diesel fuel and oxidizer comprises: providing a primary stage oxidizer introduction path; providing a secondary stage oxidizer introduction path; opening a valve in the secondary stage oxidizer introduction path upon reaching a predetermined oxidizer requirement threshold; creating an oxidizer vortex in a second pre-combustion vortex chamber with fluid flow from the secondary stage oxidizer introduction path; introducing diesel fuel at an axis of the oxidizer vortex; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer; introducing the gaseous, homogenous premixture of diesel fuel and oxidizer from the first pre-combustion vortex chamber into a combustion chamber. 23. A method of providing fuel to a diesel engine, comprising: fueling a diesel engine, the fueling comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, wherein creating the gaseous, homogenous premixture of diesel fuel and oxidizer comprises: providing a primary stage oxidizer introduction path; providing a secondary stage oxidizer introduction path; opening a valve in the secondary stage oxidizer introduction path upon reaching a predetermined oxidizer requirement threshold and holding open a valve in the primary stage oxidizer introduction path; creating an oxidizer vortex in a second pre-combustion vortex chamber with fluid flow from the secondary stage oxidizer introduction path; introducing diesel fuel at an axis of the oxidizer vortex; pulverizing the diesel fuel and mixing the diesel fuel with the oxidizer; introducing the gaseous, homogenous premixture of diesel fuel and oxidizer from the first pre-combustion vortex chamber into a combustion chamber. 24. A method of running an engine, comprising: operating a diesel engine, the operating comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber; flowing the gaseous, homogenous premixture of diesel fuel and oxidizer into a cylinder of the diesel engine; compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of greater than 21:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer; igniting the gaseous, homogenous premixture of diesel fuel and oxidizer. 25. A method of running an engine, comprising: operating a diesel engine, the operating comprising: creating a gaseous, homogenous premixture of diesel fuel and oxidizer in a first pre-combustion vortex chamber, wherein creating the gaseous, homogenous premixture of diesel fuel and oxidizer comprises maintaining a combustible mixture while reducing the diesel fuel to an average particle size such that compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least 25:1 does not cause auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer; flowing the gaseous, homogenous premixture of diesel fuel and oxidizer into a cylinder of the diesel engine; compressing the gaseous, homogenous premixture of diesel fuel and oxidizer in the cylinder with a piston at a ratio of at least about 15:1 without causing auto-ignition of the gaseous, homogenous premixture of diesel fuel and oxidizer; igniting the gaseous, homogenous premixture of diesel fuel and oxidizer.
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