Claims
- 1. A carburetor for an internal combustion engine comprising,
- a housing having a fuel-air mixing chamber in its lower portion and having a fuel inlet in its upper portion,
- an air inlet in the upper end of the mixing chamber,
- a rotor assembly movable vertically within said housing and coacting with the air inlet to substantially close the same when said assembly is at the end of its travel in one direction relative to the housing and to open said inlet upon movement of the assembly in the opposite direction of travel,
- resilient means between the rotor assembly and the housing for urging the rotor assembly in that direction which substantially closes the air inlet,
- a metering valve within the housing comprising a metering element mounted in a stationary position in the housing and a metering orifice carried by the rotor assembly,
- means for conducting fuel from the fuel inlet to said metering valve,
- the metering orifice of the rotor assembly coacting with the stationary metering element to control passage of fuel past the valve in accordance with the relative axial position of the rotor assembly with respect to the housing, such axial position of the rotor assembly also controlling the volume of air admitted to the mixing chamber,
- means for conducting the fuel which passes the metering valve through the rotor assembly and into the mixing chamber to mix with the admitted air and form the fuel-air mixture which is thereafter conducted to the engine being operated,
- means for positively guiding the rotor assembly in its axial movement within said housing to maintain accurate axial alignment of the metering orifice about the metering element througout the entire travel of the rotor assembly with respect to said metering element, and
- said means for positively guiding said rotor assembly including an elongate non-deformable guide surface forming part of the rotor assembly located between the rotor assembly and the metering element and having sliding contact with the exterior of the metering element whereby said elongate guide surface functions to prevent any lateral movement of the rotor assembly relative to said metering element during movement of the rotor assembly with respect to the element.
- 2. A carburetor for an internal combustion engine as set forth in claim 1, wherein
- the metering element is mounted axially within the upper portion of the housing and is formed with a depending tapered metering pin, and
- the metering orifice formed in the rotor assembly is so located on said assembly as to be axially aligned with the metering pin in all positions of the rotor assembly relative to the housing.
- 3. A carburetor as set forth in claim 1, together with
- means mounting the metering element axially within the housing,
- means within the housing for guiding the rotor assembly in its axial movement within said housing to maintain accurate axial alignment of the metering orifice about the metering element throughout the entire travel of the rotor assembly with respect to said metering element, and
- coacting means on the valve element and on the rotor assembly adjacent the metering orifice for positively closing the metering valve when the rotor assembly is in a position substantially closing the air inlet.
- 4. A carburetor as set forth in claim 1, together with
- a rotor member rotatably mounted on the lower end of the rotor assembly and located within the fuel-air mixing chamber,
- means on the upper surface of the rotor exposed to the air flowing into said chamber and responsive to such flow for imparting a spinning motion to said rotor, and
- a plurality of radially extending passages in said rotor and forming part of the means which conducts fuel from the metering valve to the chamber, whereby the fuel is discharged into said chamber in a multitude of fuel streams which entrains, distributes and mixes said fuel with the air in said mixing chamber.
- 5. A carburetor as set forth in claim 1, together with
- a rotor member rotatably mounted on the lower end of the rotor assembly and located within the fuel-air mixing chamber,
- means on the upper surface of the rotor exposed to and actuated by the air flowing into said chamber for imparting a spinning motion to said rotor,
- a plurality of radially extending passages in said rotor and forming part of the means which conducts fuel from the metering valve to the chamber, whereby the fuel is discharged into said chamber in a multitude of streams which entrains, distributes and mixes said fuel with the air in said mixing chamber,
- said metering element being mounted axially within the upper portion of the housing and having a depending tapered metering pin, and
- said metering orifice which is carried by the rotor assembly being located on said assembly to surround the metering pin in all axial positions of the rotor assembly relative to the housing.
- 6. A carburetor as set forth in claim 1, wherein
- said resilient means comprises a plurality of flat cantilever-type spring members extending between the housing and the rotor assembly.
- 7. A carburetor as set forth in claim 1, together with
- a single annular seal between the elongate guide surface of the rotor assembly and the metering element to minimize the frictional resistance to movement of said rotor assembly relative to the metering element.
- 8. A carburetor as set forth in claim 1, together with,
- mechanical means engaging the rotor assembly for mechanically moving said rotor assembly downwardly to supplement the engine suction in opening the metering valve and admit additional fuel for starting purposes, and
- means actuated by the accelerator of the engine and connected with the mechanical means through a lost motion connection for operating said mechanical means after said accelerator has moved a predetermined distance to thereby assure a satisfactory fuel-air mixture for starting to be admitted to the engine.
- 9. A carburetor as set forth in claim 8 wherein said mechanical means includes,
- a fork member engageable with an external flange on the rotor assembly,
- a vertically movable actuating rod having its upper end engaging said fork member to move the same and having its lower end engaged with the throttle arm control of the engine accelerator, and
- a lost motion connection between said throttle arm control and the intake valve of the engine, whereby after said valve has been opened a predetermined amount, the rod will actuate said fork member to move the rotor assembly and thereby admit an additional volume of the fuel-air mixture to the intake manifold of the engine.
- 10. A carburetor for an internal combustion engine including,
- a housing having a fuel-air mixing chamber in its lower portion,
- an air inlet in the upper end of the chamber,
- a fuel inlet in the upper portion of the housing,
- a rotor assembly movable axially within the housing,
- spring means extending between the rotor assembly and housing and urging the assembly to its uppermost position relative to the housing,
- a rotor member rotatable on the lower portion of the rotor assembly and located within the fuel-air mixing chamber,
- said rotor member coacting with the interior wall of the housing to substantially close the same when the rotor assembly is in its uppermost axial position relative to the housing and to open said air inlet as the assembly and rotor move downwardly therein,
- a fuel metering valve within the upper portion of the housing,
- means for conducting fuel from said fuel inlet to said metering valve,
- said metering valve comprising a metering element which is mounted in a fixed position in the housing and a metering orifice carried by the rotor assembly adapted to move relative to and coact with said metering element to control the flow of fuel past said valve, such movement of the rotor assembly simultaneously moving the assembly relative to the housing to control the volume of air entering said fuel-air mixing chamber,
- means for conducting the fuel flowing past the valve through the rotor member and into said chamber,
- means for exposing the rotor to the intake manifold suction of the engine to be operated, whereby the relative position of the rotor assembly orifice to the fixed metering element and the relative position of the rotor to the interior wall of the housing are controlled by said manifold suction to direct a properly proportioned fuel-air mixture to said intake manifold,
- means within the housing for positively guiding the rotor assembly in its axial movement within said housing to maintain accurate axial alignment of the metering orifice about the metering element throughout the entire travel of the rotor assembly with respect to said metering element, and
- said means for positively guiding the rotor assembly including a guide sleeve forming part of said rotor assembly and surrounding the major portion of the metering element in an axial direction, the bore of said guide sleeve having a sliding contact with said metering element in all positions of the rotor assembly with respect to the metering element.
- 11. A carburetor as set forth in claim 10, wherein
- the means for conducting the fuel flowing through the rotor member includes a plurality of radially extending passages in said rotor, whereby the fuel is discharged into said chamber in a multitude of streams as the rotor member rotates to assure entrainment and distribution of the fuel throughout the air within the mixing chamber.
- 12. A carburetor as set forth in claim 10, wherein
- the metering element is mounted axially within the upper portion of the housing and is formed with a depending tapered metering pin, and
- the metering orifice carried the rotor assembly is so located on said assembly as to surround the metering pin in all axial positions of the rotor assembly relative to the housing.
- 13. A carburetor as set forth in claim 10, together with
- coacting means on the metering element and on the rotor assembly adjacent the metering orifice for positively closing the metering valve to shut off fuel flow to the chamber when the rotor assembly is in its uppermost position relative to the housing.
- 14. A carburetor as set forth in claim 10, wherein
- the spring means comprises a plurality of flat horizontally extending cantilever-type spring members.
- 15. A carburetor including,
- a housing having a lower portion forming a fuel-air mixing chamber and an upper portion speed from and connected with the lower portion and having an axial bore,
- a rotor assembly including an annular body slidable within the axial bore of the upper portion and having a rotor disk rotatably mounted on its lower end and disposed within the fuel-air mixing chamber,
- resilient means supporting the rotor assembly on said housing and urging said assembly upwardly,
- the rotor disk being adapted to coact with the wall of the chamber to substantially close the air inlet when the rotor assembly is in an upper position and to open said inlet when said assembly is in a lowered position,
- a fuel inlet extending into the upper portion of the housing,
- a fuel control valve rod mounted in a fixed position in the upper end of the housing,
- a metering orifice mounted on the rotor assembly to coact with the valve rod and forming a fuel control valve to control flow passing the valve rod in accordance with the relative position of the metering orifice with respect to the valve rod,
- means conducting fuel to said fuel control valve and through the rotor disk to the mixing chamber,
- means on said rotor disk in the path of the air flow when the air inlet is open and acted upon by said air flow to impart a rotation to the disk to enhance the mixture of fuel discharging through the rotor with the air entering said fuel-air mixing chamber, and
- a non-deformable guide surface on the annular body of the rotor assembly engageable with a substantial portion of the fuel control valve rod for guiding the annular body of the rotor assembly within the bore of the housing to maintain it and its metering orifice in axial alignment with the fuel control valve rod and to prevent lateral movement of the body relative to the rod.
- 16. A caburetor for an internal combustion engine comprising,
- a housing having a fuel-air mixing chamber in its lower portion and having a fuel inlet in its upper portion,
- an air inlet in the upper end of the mixing chamber,
- a rotor assembly movable vertically within said housing and coacting with the air inlet to substantially close the same when said assembly is at the end of its travel in one direction relative to the housing and to open said inlet upon movement of the assembly in the opposite direction of travel,
- resilient means between the rotor assembly and the housing for urging the rotor assembly in that direction which substantially closes the air inlet,
- a metering valve within the housing comprising a metering element mounted in a stationary position in the housing and a metering orifice carried by the rotor assembly,
- means for conducting fuel from the fuel inlet to said metering valve,
- the metering orifice of the rotor assembly coacting with the stationary metering element to control passage of fuel past the valve in accordance with the relative vertical position of the rotor assembly with respect to the housing, such vertical position of the rotor assembly also controlling the volume of air admitted to the mixing chamber,
- said metering element being formed of a rod which is of a constant and uniform cross-sectional shape throughout the major portion of its length, said rod having a tapered metering pin extending downwardly therefrom,
- said metering orifice being formed at the lower end of an elongate non-deformable guide sleeve which is a part of the movable rotor assembly,
- the bore of the guide sleeve having a sliding and sealing engagement with the outer surface of the constant cross-sectional portion of said rod and having the orifice at the lower end of said sleeve encircling and coacting with the tapered metering pin to control passage of fuel past the valve,
- said guide sleeve functioning to prevent lateral movement of the rotor assembly relative to the rod of the metering element to thereby maintain axial alignment of the orifice in relationship to the metering pin throughout the entire travel of the rotor assembly with respect to the metering element.
- 17. A carburetor as set forth in claim 16, together with
- a flat closure surface on the metering element at the intersection of the lower end of the cylindrical portion of the rod and the upper end of the tapered metering pin and extending in a plane which is normal to the axis of the metering element, and
- a complementary flat surface at the upper end of the metering orifice adapted to engage the flat surface on said metering element to effect a positive closure of the orifice and shut-off of the fuel when the rotor assembly is in its uppermost position relative to the metering element.
- 18. A carburetor for an internal combustion engine including,
- a housing formed of a lower portion having a fuel-air mixing chamber therein and an upper portion spaced from but connected to said lower portion,
- said upper portion having a central bore, the lower end of which is open and the upper end of which is closed,
- an air inlet in the upper end of the fuel-air mixing chamber,
- a rotor assembly movable vertically with respect to both upper and lower portions of the housing,
- a rotor member rotatable on the lower end of the rotor assembly and located within the fuel-air mixing chamber,
- spring means extending between the rotor assembly and the housing and urging said assembly to its uppermost position relative to the housing,
- means on the upper end of the rotor assembly slidable within the bore of the upper portion of the housing to maintain alignment of the rotor assembly with respect to the housing,
- said rotor member coacting with the interior wall of the mixing chamber to substantially close the air inlet when the rotor assembly is in its uppermost position relative to the housing and to open said air inlet as the assembly and rotor member move downwardly therein,
- a fuel inlet connected with the rotor assembly for conducting fuel to the interior of the assembly,
- a fuel metering valve within the interior of said assembly,
- means for conducting said fuel from the metering valve into the fuel-air mixing chamber,
- said fuel metering valve comprising a metering element having its upper end connected in a predetermined fixed position within the upper portion of the housing and a metering orifice mounted in the rotor assembly and movable relative to the metering element to coact therewith to control flow past the metering valve, such movement of said rotor assembly simultaneously moving the rotor relative to the interior wall of the chamber to control the volume of air entering said fuel-air mixing chamber, and
- non-deformable guide means within the rotor assembly and slidably engaged with a substantial portion of the exterior surface of the metering element for positively guiding the rotor assembly in its vertical movement to prevent lateral movement of the rotor assembly relative to the metering element to thereby maintain accurate axial alignment of the metering orifice about the metering element throughout the entire travel of the rotor assembly with respect to the metering element.
- 19. A carburetor as set forth in claim 18, wherein
- the spring means comprises a plurality of cantilever-type flat springs which extend between the housing and the rotor assembly.
- 20. A carburetor as set forth in claim 18, wherein
- the upper end of the metering element is threaded into the upper portion of the housing, whereby its position relative to the rotor assembly may be adjusted.
- 21. A carburetor as set forth in claim 18, wherein
- the metering element is a rod which is cylindrical in cross-section throughout the major portion of its length and having a tapered metering pin extending downwardly from said cylindrical portion, and
- wherein said metering orifice is so located on the rotor assembly that the tapered metering pin extends through said orifice and has different relative positions with respect thereto as the rotor assembly moves relative to the metering element.
- 22. A carburetor as set forth in claim 18, wherein
- the spring means comprises a plurality of cantilever-type flat springs which extend between the housing and the rotor assembly,
- a flat closure surface on the metering element at the intersection of the lower end of the cylindrical portion of the rod and the upper end of the tapered metering pin and extending in a plane which is normal to the axis of the metering element, and
- a complementary flat surface at the upper end of the metering orifice adapted to engage the flat surface on said metering element to effect a positive closure of the orifice and shut-off of the fuel when the rotor assembly is in its uppermost position relative to the metering element.
- 23. A carburetor as set forth in claim 18, wherein
- the non-deformable guide means for positively guiding the rotor assembly in its vertical movement is a relatively elongate sleeve forming part of the rotor assembly with the bore of said sleeve slidable on the cylindrical surface of the metering rod, and
- a single annular seal surrounding the cylindrical portion of the rod in sealing engagement with the bore of the guide sleeve.
- 24. A carburetor for an internal combustion engine comprising,
- a housing having a fuel-air mixing chamber in its lower portion and a fuel inlet in its upper portion,
- a rotor assembly movable vertically within the housing and having a disk-like rotor member rotatably mounted on its lower end, said rotor member being disposed within the fuel-air mixing chamber,
- the fuel-air mixing chamber being formed by a generally annular wall and having an air inlet in its upper central portion, the chamber being defined by a first upper inwardly inclined wall surface which overlies the upper surface of the rotor member, a second wall surface of increasing diameter extending downwardly from the first wall surface and a third wall surface of decreasing diameter extending downwardly from the second surface to the outlet,
- resilient means between the rotor assembly and the housing urging the assembly and its rotor member upwardly within the chamber and into close proximity to said first and second wall surfaces to substantially close the air inlet to said chamber,
- means on the upper surface of the rotor responsive to the incoming air flow for rotating said rotor when the air inlet is opened by downward movement of the rotor member within the chamber.
- said rotor member coacting with the first and second wall surfaces as said member moves downwardly to cause the incoming air to change direction and then flow across the upper surface of the member and again change direction as it passes downwardly around the periphery of the rotor member, such change creating sufficient inertial force to assure rotation of the rotor member instantaneously upon downward movement of the rotor, and
- a metering valve within the housing comprising a metering element mounted in a stationary position in the housing and a metering orifice carried by the rotor assembly,
- means for conducting fuel from the fuel inlet to said metering valve, and
- additional means for conducting the fuel which passes the metering valve to and through the rotor of said rotor assembly to distribute said fuel within the air in the fuel-air mixing chamber.
- 25. A carburetor for an internal combustion engine comprising,
- a housing having a fuel-air mixing chamber in its lower portion and a fuel inlet in its upper portion,
- a rotor assembly movable vertically within the housing and having a disk-like rotor member rotatably mounted on its lower end, said rotor member being disposed within the fuel-air mixing chamber and having its bottom surface exposed to the suction of the engine,
- the fuel-air mixing chamber being formed by a generally annular wall and having an upper inwardly inclined wall surface which overlies the upper surface of the rotor member,
- an air inlet in the upper wall which admits and directs air onto the upper surface of the rotor member at a point spaced inwardly of the periphery of said rotor member,
- resilient means between the rotor assembly and the housing urging the assembly and its rotor member upwardly within the chamber and into close proximity to the internal surface of the annular wall and to said overlying inclined wall surface to substantially close the air inlet to said chamber,
- means on the upper surface of the rotor responsive to the incoming air flow for rotating said rotor when the air inlet is opened by downward movement of the rotor member within the chamber,
- said rotor member coacting with the wall surfaces as said member moves downwardly to cause the incoming air to change direction and then flow across the upper surface of the member and again change direction as it passes downwardly around the periphery of the rotor member, such change creating sufficient inertial force to assure rotation of the rotor member instantaneously upon the application of the engine suction to the rotor,
- a metering valve within the housing comprising a metering element mounted in a stationary position in the housing and a metering orifice carried by the rotor assembly,
- means for conducting fuel from the fuel inlet to said metering valve, and
- additional means for conducting the fuel which passes the metering valve to and through the rotor of said rotor assembly to distribute said fuel within the air in the fuel-air mixing chamber.
- 26. A carburetor as set forth in claim 25, wherein
- the metering element is a rod which is cylindrical in cross-section throughout the major portion of its length and having a tapered metering pin extending downwardly from said cylindrical portion, and
- wherein said metering orifice is so located on the rotor assembly that the tapered metering pin extends through said orifice and has different relative positions with respect thereto as the rotor assembly moves relative to the metering element.
- 27. A carburetor for an internal engine comprising,
- a housing having a fuel-air mixing chamber in its lower portion and a fuel inlet in its upper portion,
- a rotor assembly movable vertically within the housing and having a disk-like rotor member rotatably mounted on its lower end, said rotor member being disposed within the fuel-air mixing chamber and having its bottom surface exposed to the suction of the engine,
- the fuel-air mixing chamber being formed by a generally annular wall and having an upper inwardly inclined wall surface which overlies the upper surface of the rotor member,
- an air inlet in the upper wall which admits and directs air onto the upper surface of the rotor member at a point spaced inwardly of the periphery of said rotor member,
- resilient means between the rotor assembly and the housing urging the assembly and its rotor member upwardly within the chamber and into close proximity to the internal surface of the annular wall and to said overlying inclined wall surface to substantially close the air inlet to said chamber,
- means on the upper surface of the rotor responsive to the incoming air flow for rotating said rotor when the air inlet is opened by downward movement of the rotor member within the chamber,
- said rotor member coacting with the wall surfaces as said member moves downwardly to cause the incoming air to change direction and then flow across the upper surface of the member and again change direction as it passes downwardly around the periphery of the rotor member, such change creating sufficient inertial force to assure rotation of the rotor member instantaneously upon the application of the engine suction to the rotor,
- a metering valve within the housing comprising a metering element mounted in a stationary position in the housing and a metering orifice carried by the rotor assembly,
- means for conducting fuel from the fuel inlet to said metering valve,
- additional means for conducting the fuel which passes the metering valve to and through the rotor of said rotor assembly to distribute said fuel within the air in the fuel-air mixing chamber,
- a flat annular closure surface on the metering element extending in a plane which is normal to the axis of the metering element, and
- a complementary flat surface at the upper end of the metering orifice adapted to engage the flat surface on said metering element to effect a positive closure of the orifice and shut-off of the fuel when the rotor assembly is in its uppermost position relative to the metering element.
REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of my prior application Ser. No. 754,031, filed Dec. 23, 1976, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (1)
Number |
Date |
Country |
208141 |
Nov 1923 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
754031 |
Dec 1976 |
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