US4856713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-fuel injector
Assignee: ENERGY CONSERVATION INNOVATIONS Inc
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Filing: 1988-08-04
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Granted: 1989-08-15
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Expires: 2008-08-04
Abstract
Abstract A dual-fuel injector is provided which allows precisely controlled injection of liquid and slurry fuels into an engine or the like, which prevents separation of solid material from the liquid carrier in the slurry fuel, and which prevents abrasion of selected surfaces of the injector by the solid material. The preferred injector includes a housing and an electronically actuated liquid and slurry fuel assemblies. In operation, pressurized liquid fuel supplied to the injector is used to amplify the injection pressure of the respective fuels for discharge through respective nozzles. The slurry fuel is continously circulated through the injector to prevent separation of the solid material from the liquid carrier and liquid fuel is used to purge selected surfaces of the injector to prevent the abrasion thereof by the solid material in the slurry fuel.
Inventors
- 👤 Lauren W. Burnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:19
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/46; F02M59/466; F02M43/00; F02M43/04; F02M59/02; F02M59/10; F02M59/105; F02M2200/00; F02M2200/46
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
175 words
A dual-fuel injector for injecting a liquid fuel and a slurry fuel into a combustion chamber or the like, the slurry fuel including a solid material suspended in a liquid carrier, the dual-fuel injector comprising: a housing having structure defining respective liquid and slurry fuel inlets for receiving liquid and slurry fuels from respective sources thereof, and having housing walls defining a discharge opening; a liquid fuel assembly; a slurry fuel assembly, said assemblies and housing walls defining respective liquid and slurry fuel discharge nozzles, said liquid fuel assembly including selectively actuatable liquid fuel injection means operably received within said housing for selectively discharging liquid fuel received from said liquid fuel inlet through said liquid fuel nozzle, and liquid fuel actuator means for selectively actuating said liquid fuel injection means, said slurry fuel assembly including selectively actuatable slurry fuel injection means operably received within said housing for selectively discharging slurry fuel received from said slurry fuel inlet through said slurry fuel nozzle, and slurry fuel actuator means for selectively actuating said slurry fuel injection means.
Claim 2
Dependent Claim
175 words
A dual-fuel injector for injecting a liquid fuel and a slurry fuel into a combustion chamber or the like, the slurry fuel including a solid material suspended in a liquid carrier, the dual-fuel injector comprising: a housing having structure defining respective liquid and slurry fuel inlets for receiving liquid and slurry fuels from respective sources thereof, and having housing walls defining a discharge opening; a liquid fuel assembly; a slurry fuel assembly, said assemblies and housing walls defining respective liquid and slurry fuel discharge nozzles, said liquid fuel assembly including selectively actuatable liquid fuel injection means operably received within said housing for selectively discharging liquid fuel received from said liquid fuel inlet through said liquid fuel nozzle, and liquid fuel actuator means for selectively actuating said liquid fuel injection means, said slurry fuel assembly including selectively actuatable slurry fuel injection means operably received within said housing for selectively discharging slurry fuel received from said slurry fuel inlet through said slurry fuel nozzle, and slurry fuel actuator means for selectively actuating said slurry fuel injection means.
Claim 3
Dependent Claim
74 words
The injector as set forth in claim 1, further including means defining a slurry fuel outlet in said housing for exit of slurry fuel therefrom, and means defining a slurry fuel chamber within said housing communicated with said slurry fuel inlet and outlet for allowing movement of slurry fuel through said slurry fuel inlet, injection chamber, and outlet in order to prevent separation of the solid material from the liquid carrier in said injector.
Claim 4
Dependent Claim
60 words
The injector as set forth in claim 1, said housing and assemblies presenting certain adjacent surfaces shiftable relative to one another, said injector including means for directing a flow of liquid fuel between selected ones of said adjacent surfaces in order to prevent the presence of solid material therebetween thereby preventing abrasion of said adjacent surfaces by the solid material.
Claim 5
Dependent Claim
72 words
The injector as set forth in claim 1, said liquid fuel inlet receiving pressurized liquid fuel from a source thereof, said slurry fuel injection means including means responsive to the application of pressurized liquid fuel thereto for actuation thereby in order to discharge slurry fuel through said slurry fuel nozzle, said slurry fuel actuator means including a slurry piston pump and means for selectively applying pressurized liquid fuel thereto for actuation thereof.
Claim 6
Dependent Claim
72 words
The injector as set forth in claim 4, further including means defining a slurry fuel injection chamber within said housing interposed between said pump piston and said slurry fuel nozzle and communicated with said slurry fuel inlet for receiving slurry fuel therefrom, said piston pump including means for engaging and pressurizing slurry fuel contained within said slurry fuel injection chamber in response to application of pressurized liquid fuel to said pump piston.
Claim 7
Dependent Claim
32 words
The injector as set forth in claim 5, said pump piston pressurizing said slurry fuel to a pressure greater than the pressure of said pressurized liquid fuel applied to said pump piston.
Claim 8
Dependent Claim
44 words
The injector as set forth in claim 5, said slurry fuel assembly including means for selectively closing and opening said slurry fuel nozzle and for opening said slurry fuel nozzle in response to a predetermined pressure of slurry fuel within said slurry fuel chamber.
Claim 9
Dependent Claim
17 words
The injector as set forth in claim 1, the slurry fuel including pulverized coal suspended in water.
Claim 10
Dependent Claim
13 words
The injector as set forth in claim 1, liquid fuel including diesel fuel.
Claim 11
Dependent Claim
13 words
The injector as set forth in claim 1, said assemblies being axially aligned.
Claim 12
Dependent Claim
23 words
The injector as set forth in claim 10, said liquid fuel assembly having a portion thereof axially received within said slurry fuel assembly.
Claim 13
Dependent Claim
36 words
The injector as set forth in claim 1, said liquid and slurry fuel actuator means each including means for receiving electronic signals and for responding thereto for actuating said respective liquid and slurry fuel injection means.
Claim 14
Dependent Claim
39 words
The injector as set forth in claim 1, said liquid and slurry fuel injection means being operable for discharging respective amounts of liquid and slurry fuel through said respective nozzles corresponding to the duration of said respective electronic signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |