Claims
- 1. Apparatus for producing a combustible air-fuel mixture for an engine, comprising:
a frame forming a passage through which air can flow in a downstream direction, said passage having opposite passage side walls, and opposite passage ends; a first end wall that forms a first of said passage ends and a moveable second end wall that forms a second of said passage ends, said movable second end wall being moveable closer and further from said first end wall to vary the cross-sectional area of the passage; said moveable second end wall has a bore extending substantially parallel to movement of said moveable second end wall; a fuel-carrying tube slideably projecting through said bore but fixed with respect to said frame, so as said moveable second end wall moves progressively away from said first end wall, a progressively increasing length of said fuel-carrying tube is progressively exposed to said passage, with said progressively increasing length of tube having at least one perforation with perforation areas exposed to said passage that progressively increase in area as said moveable second end wall moves away from said first end wall.
- 2. The apparatus described in claim 1 wherein:
said tube has proximal and distal ends each fixed to said frame, with said tube proximal end fixed to said first end wall, and said tube includes a tube portion extending between said first end wall and said moveable second end wall, said moveable second end wall having bore walls slideable around said tube, and said moveable second end wall having an elastomeric seal that seals against said tube to prevent the escape of fuel from a location of said perforation into said passage until said location has been uncovered by sufficient movement of said moveable second end wall away from said first end wall.
- 3. The apparatus described in claim 1 wherein:
said tube is elongated and said perforation comprises an elongated slot extending along part of the length of said tube and opening primarily downstream along said passage.
- 4. The apparatus described in claim 3 wherein:
said tube has opposite tube sides at opposite sides of said slot, and has a pin extending between said tube sides to fix the separation of said tube sides.
- 5. The apparatus described in claim 1 including:
at least one elastomeric seal lying at an end of said bore that is closest to said first end wall, to block the passage of fuel out of an end of said passage that lies closest to said first wall.
- 6. The apparatus described in claim 1 including:
lever means having a first lever part coupled to said moveable second end wall, having a second lever part pivotally mounted on said frame, and having a throttle connecting part that can be moved to move said moveable second end wall toward and away from said first end wall.
- 7. The apparatus described in claim 1 wherein:
said passage side walls are curved about an axis extending parallel to said upstream and downstream directions; a portion of said fuel-carrying tube that lies in said movable second end wall is also curved about said axis.
- 8. The apparatus described in claim 1 wherein:
said passage side walls are curved about a first axis that extends parallel to said upstream and downstream directions; and including a lever having a first lever part pivotally connected to said frame about said first axis, and having a second lever part that is fixed to said moveable second end wall.
- 9. The apparatus described in claim 1 wherein:
said passage side walls are straight in a direction perpendicular to upstream and downstream longitudinal direction; and including a lever having first and second lever part pivotally coupled to locations respectively on said frame and on said moveable wall about parallel longitudinally-extending axes, with one of said lever parts also being slideable with respect to one of said locations.
- 10. The apparatus described in claim 1 wherein:
said fuel-carrying tube has an initial portion that lies adjacent to said first wall; and including an idle tube that has an idle nozzle end that is directed at said initial portion of said fuel-carrying tube, to allow said fuel-carrying tube to disperse fuel directed at it from said idle nozzle.
- 11. Apparatus for producing a combustible air-fuel mixture to power an engine, comprising:
a frame forming a through passage that has longitudinally spaced upstream and downstream passage parts, opposite passage side walls, and opposite passage ends, said passage having an air inlet that converges in a downstream direction toward a throat, and an outlet that diverges in a downstream direction away from said throat; a first end wall that forms a first of said passage ends, and a moveable second end wall that forms a second of said passage ends, said second end wall being moveable closer and further from said first end wall to vary the cross-sectional area of the passage; a lever pivotally coupled to said frame and coupled to said moveable second end wall to move said moveable second end wall toward and away from said first end wall.
- 12. The apparatus described in claim 11 wherein:
said moveable second end wall has a bore extending largely parallel to movement of said second end wall away from said first end wall; and including a fuel-carrying tube slideably projecting through said bore, said tube projecting through said passage and fixed to said frame, said tube having at least one aperture that is uncovered to emit progressively more fuel into said passage as said movable second end wall moves away from said first end wall.
- 13. The apparatus described in claim 11 wherein:
said opposite side walls are each curved about a longitudinally-extending first axis, and said lever is pivotally mounted on said frame about said first axis and has a lever end that is fixed to said moveable wall to control its orientation as well as its position.
- 14. The apparatus described in claim 11 wherein:
said passage side walls each extends straight in a direction that is perpendicular to said longitudinal direction; and said lever has a first lever part that is pivotally coupled to said frame about a first longitudinally-extending axis and said lever has a second lever part that is pivotally coupled to said moveable wall about said second longitudinally-extending axes with said second part being slideable with respect to said moveable wall.
- 15. Apparatus for producing a combustible air-fuel mixture to power an engine, which includes a frame forming a through passage that has longitudinally spaced upstream and downstream passage parts, opposite passage side walls, and opposite passage ends, said passage having an air inlet that converges in a downstream direction toward a throat, and an outlet that diverges in a downstream direction away from said throat, including a first passage end wall that blocks a first of said ends of said passage, and a moveable second passage end wall that blocks a second of said ends of said passage, with said moveable second end wall being moveable closer and further from said first end wall to vary the cross-sectional area of the passage, wherein:
said opposite passage side walls are curved about a longitudinally-extending axis; and including a lever pivotally connected to said frame about said axis, with said lever being fixed to said moveable second end wall to thereby help control the orientation of said second moveable end wall as well as move it along a space between said curved side walls.
- 16. The apparatus described in claim 15 wherein:
said moveable second end wall has a bore; and including a fuel tube having a proximal end fixed to said first end wall, said fuel tube extending across said passage and through said bore in said moveable second end wall, with said fuel tube having a plurality of aperture portions that are progressively uncovered to flow progressively more fuel into said passage as said moveable second end wall moves progressively further from said first end wall.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] Applicant claims priority from U.S. Provisional Application Serial No. 60/249,554 filed Nov. 17, 2000.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60249554 |
Nov 2000 |
US |