US3893436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply system, carburetor for use in the same and method
Assignee: Individual
•
Filing: 1974-05-13
•
Granted: 1975-07-08
•
Expires: 1994-05-13
Abstract
Abstract Fuel supply system for an internal combustion engine having at least one cylinder with a moving piston therein to provide a combustion chamber within the cylinder which is adapted to be placed in communication with an intake opening by operation of an intake valve. A carburetor and means for supplying fuel to the carburetor are provided as a part of the system. The carburetor includes means forming a wave tube of substantially constant cross-sectional area with one end open to the atmosphere and with the other end adapted to be placed in communication with the intake opening. Means forming an orifice is disposed in the wave tube for supplying fuel to the interior of the wave tube. Throttle means is disposed in the wave tube between the region in which the fuel is introduced and the intake opening. The means for supplying a liquid fuel to the carburetor includes means for supplying fuel to a level which approximately just covers the orifice.
Inventors
- 👤 Jr William H Beekhuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:03
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/005; F02B27/006; F02M; F02M13/00; F02M13/02; F02M17/00; F02M17/02; F02M9/00; F02M9/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
295 words
A fuel supply system for an internal combustion engine having at least one combustion chamber which is adapted to be placed in communication with an intake opening during each intake event, comprising wall means forming a wave tube having a substantially unimpeded flow passage with one end open to the atmosphere and with the other end adapted to be placed in communication with the intake opening of the internal combustion engine, means forming an orifice disposed in the wall means forming the wave tube and opening into the flow passage of the wave tube, means for supplying fuel to the orifice so that the fuel has a level which will reach the orifice but will not flow through the orifice solely because of the level of the fuel with respect to the orifice, and throttle valve means disposed in the wave tube between the region in which the fuel is introduced into the wave tube and the intake opening, said throttle valve means being formed so that a shock wave from the engine can be propagated down the wave tube to cause fuel to be drawn into the wave tube through the orifice substantially solely during propagation of the pressure shock wave along the wave tube and to atomize the fuel so that the atomized fuel can be carried into the combustion chamber by the incoming air stream flowing in the wave tube, the pressure effect of said wave serving as substantially the sole means for metering fuel from the orifice, said wall means forming a wave tube including a body, said body being formed with shock wave terminating means for preventing a shock wave from traveling substantially more than one round trip in the flow passage in the wave tube for each intake event.
Claim 2
Dependent Claim
295 words
A fuel supply system for an internal combustion engine having at least one combustion chamber which is adapted to be placed in communication with an intake opening during each intake event, comprising wall means forming a wave tube having a substantially unimpeded flow passage with one end open to the atmosphere and with the other end adapted to be placed in communication with the intake opening of the internal combustion engine, means forming an orifice disposed in the wall means forming the wave tube and opening into the flow passage of the wave tube, means for supplying fuel to the orifice so that the fuel has a level which will reach the orifice but will not flow through the orifice solely because of the level of the fuel with respect to the orifice, and throttle valve means disposed in the wave tube between the region in which the fuel is introduced into the wave tube and the intake opening, said throttle valve means being formed so that a shock wave from the engine can be propagated down the wave tube to cause fuel to be drawn into the wave tube through the orifice substantially solely during propagation of the pressure shock wave along the wave tube and to atomize the fuel so that the atomized fuel can be carried into the combustion chamber by the incoming air stream flowing in the wave tube, the pressure effect of said wave serving as substantially the sole means for metering fuel from the orifice, said wall means forming a wave tube including a body, said body being formed with shock wave terminating means for preventing a shock wave from traveling substantially more than one round trip in the flow passage in the wave tube for each intake event.
Claim 3
Dependent Claim
67 words
A system as in claim 1 wherein said means for supplying fuel includes a fuel supply bowl, means for supplying liquid fuel to the fuel bowl, control means for preventing liquid fuel from being introduced into the fuel bowl to a level which is significantly above the orifice and a drain tube connected to the fuel bowl for draining off excess liquid fuel from the fuel bowl.
Claim 4
Dependent Claim
24 words
A system as in claim 2 wherein said drain tube is connected to the fuel bowl at a position which is above the orifice.
Claim 5
Dependent Claim
33 words
A system as in claim 2 wherein said control means for preventing fuel from being introduced into the fuel bowl to a level which is significantly above the orifice includes said drain tube.
Claim 6
Dependent Claim
112 words
A system as in claim 1 wherein said body has an elongate recess formed therein with a bore opening into the recess and wherein said throttle valve is in the form of a throttle plate slidably mounted in said recess in said body, for movement between throttle open and throttle closed positions, said throttle plate having an opening therein adapted to be moved into registration with said bore in said body so that it is in alignment with and forms a part of the wave tube when the throttle plate is in the throttle open position and is out of registration with said bore in said body in the throttle closed position.
Claim 7
Dependent Claim
31 words
A system as in claim 5 together with yieldable means for urging said throttle plate into a position so that the bore in said body is occluded by said throttle plate.
Claim 8
Dependent Claim
38 words
A system as in claim 6 together with means for moving said throttle plate so that the opening in said throttle plate is in registration with said bore in said body against the force of said yieldable means.
Claim 9
Dependent Claim
33 words
A system as in claim 1 wherein said terminating means is in the form of at least one opening located in the body and establishes communication between the atmosphere and the flow passage.
Claim 10
Dependent Claim
29 words
A system as in claim 5 together with supplemental air bleed means formed in the body in communication with the flow passage under the control of the throttle valve.
Claim 11
Dependent Claim
44 words
A system as in claim 9 wherein said supplemental air bleed means is prOvided by a slot in the body open to the recess in the body and a hole in the body in communication with the slot and being open to the atmosphere.
Claim 12
Dependent Claim
133 words
In a carburetor, a body having a bore therein, said body being formed with a recess and a throttle plate slidably mounted in said body, said throttle plate having a hole therein adapted to be moved into and out of registration with said bore in said body by movement of the throttle plate, said bore in said body and said hole in said throttle plate being adapted to form a substantially unimpeded flow passage, said body being formed with terminating means extending substantially transversely to the major axis of the flow passage and establishing communication between the bore in said body and the atmosphere for preventing a shock wave in the flow passage from traveling substantially more than one round trip in the flow passage in the wave tube for each intake event.
Claim 13
Dependent Claim
133 words
In a carburetor, a body having a bore therein, said body being formed with a recess and a throttle plate slidably mounted in said body, said throttle plate having a hole therein adapted to be moved into and out of registration with said bore in said body by movement of the throttle plate, said bore in said body and said hole in said throttle plate being adapted to form a substantially unimpeded flow passage, said body being formed with terminating means extending substantially transversely to the major axis of the flow passage and establishing communication between the bore in said body and the atmosphere for preventing a shock wave in the flow passage from traveling substantially more than one round trip in the flow passage in the wave tube for each intake event.
Claim 14
Dependent Claim
15 words
A carburetor as in claim 11 wherein said terminating means is downstream the throttle plate.
Claim 15
Dependent Claim
29 words
A carburetor as in claim 11 together with means for yieldably urging said throttle plate into a position in which said throttle plate occludes said bore in said body.
Claim 16
Dependent Claim
34 words
A carburetor as in claim 13 together with means for moving said throttle plate into a position in which said hole is in alignment with said bore against the force of said yieldable means.
Claim 17
Dependent Claim
25 words
A carburetor as in claim 11 together with means forming an orifice in the body for admitting liquid fuel into said bore in said body.
Claim 18
Dependent Claim
22 words
A carburetor as in claim 15 together with a fuel bowl having a chamber in communication with said means forming the orifice.
Claim 19
Dependent Claim
32 words
A carburetor as in claim 16 together with means for controlling the level of the liquid fuel in said chamber so that it is generally at the same level as the orifice.
Claim 20
Dependent Claim
182 words
In a fuel supply system for an internal combustion engine of a type having a plurality of combustion chambers and having intake openings adapted to be placed into communication with the combustion chambers during intake events, the system comprising separate carburetor means for each of said intake openings, each of said carburetor means including means forming a wave tube having a flow passage therein with one end open to the atmosphere and the other end in communication with an intake opening, means forming an orifice disposed in the wave tube for supplying fuel to the interior of the wave tube, throttle valve means disposed in the wave tube between the region in which the fuel is introduced and the intake opening, means for supplying liquid fuel to the orifice at a level so that fuel will not flow through the orifice solely under the force of gravity and terminating means in the means forming a wave tube for preventing a shock wave in the flow passage from traveling substantially more than one round trip in the flow passage for each intake event.
Claim 21
Dependent Claim
182 words
In a fuel supply system for an internal combustion engine of a type having a plurality of combustion chambers and having intake openings adapted to be placed into communication with the combustion chambers during intake events, the system comprising separate carburetor means for each of said intake openings, each of said carburetor means including means forming a wave tube having a flow passage therein with one end open to the atmosphere and the other end in communication with an intake opening, means forming an orifice disposed in the wave tube for supplying fuel to the interior of the wave tube, throttle valve means disposed in the wave tube between the region in which the fuel is introduced and the intake opening, means for supplying liquid fuel to the orifice at a level so that fuel will not flow through the orifice solely under the force of gravity and terminating means in the means forming a wave tube for preventing a shock wave in the flow passage from traveling substantially more than one round trip in the flow passage for each intake event.
Claim 22
Dependent Claim
26 words
A system as in claim 18, together with air cleaner means for filtering the air prior to the time it is supplied to the wave tubes.
Claim 23
Dependent Claim
39 words
A system as in claim 18 wherein as a part of said throttle valve means certain of said carburetors are provided with a common throttle plate, said throttle plate having an opening therein for each of said certain carburetors.
Claim 24
Dependent Claim
137 words
In a method for introducing a fuel and air mixture into the combustion chamber of an internal combustion engine, in which shock waves are formed and in which a column of air flows into the combustion chamber during each intake event, providing a supply of liquid fuel adjacent the column of air propagating a shock wave created in the engine outwardly through the column of air to cause fuel to be drawn into the column of air and to be atomized so that the atomized fuel can travel with the column of air, providing a reflected shock wave which travels inwardly through the column of air, and substantially attentuating the reflected shock wave so that there is substantially only one round trip travel of the shock wave from and back to the engine duRing each intake event.
Claim 25
Dependent Claim
137 words
In a method for introducing a fuel and air mixture into the combustion chamber of an internal combustion engine, in which shock waves are formed and in which a column of air flows into the combustion chamber during each intake event, providing a supply of liquid fuel adjacent the column of air propagating a shock wave created in the engine outwardly through the column of air to cause fuel to be drawn into the column of air and to be atomized so that the atomized fuel can travel with the column of air, providing a reflected shock wave which travels inwardly through the column of air, and substantially attentuating the reflected shock wave so that there is substantially only one round trip travel of the shock wave from and back to the engine duRing each intake event.
Claim 26
Dependent Claim
27 words
A method as in claim 21 together with the step of confining the moving column of air in a wave tube having a substantially unimpeded flow passage.
Claim 27
Dependent Claim
34 words
A method as in claim 22 together with the step of controlling the time delay between the reflected shock wave and the outgoing propagated shock wave by controlling the length of the wave tube.
Claim 28
Dependent Claim
31 words
A method as in claim 22 together with the step of controlling the pressure amplitude of the outgoing and reflected shock waves by controlling the cross-sectional area of the wave tube.
Claim 29
Dependent Claim
118 words
A system as in claim 1 wherein said means for maintaining the level of liquid fuel with respect to said orifice comprises a fuel bowl having fuel therein at a predetermined level with an air space above the fuel, a sealed fuel supply vessel located at a level above said fuel bowl, means forming a fuel feed passage connecting said fuel bowl and said fuel supply vessel, means forming a control passage between the air space above the fuel in said fuel supply vessel and down to the predetermined level in the fuel bowl, and means forming a vent passage in the fuel bowl between the air space above the fuel in said fuel bowl and the atmosphere.
Claim 30
Dependent Claim
148 words
A system as in claim 1 wherein said means for maintaining the level of liquid fuel with respect to said orifice comprises a fuel bowl having fuel therein at a predetermined level with an air space above the fuel, a fuel supply vessel located at a level below said fuel bowl, means forming a fuel feed passage between said fuel bowl and said fuel supply vessel, fuel pump means connected in said means forming a fuel passage for supplying fuel from said vessel to said bowl, means forming a fuel drain passage connected between said fuel bowl and said fuel supply vessel, said means forming the drain passage being positioned in the bowl so that a predetermined fuel level is maintained in the bowl, and means in the fuel bowl forming a vent passage between the air space above the fuel in said fuel bowl and the atmosphere.
Claim 31
Dependent Claim
36 words
A system as in claim 26 together with a fuel flow regulator connected into said means forming said fuel feed passage and which is responsive to engine fuel demand whereby said regulator prevents excess fuel recirculation.
Claim 32
Dependent Claim
260 words
A fuel supply system for an internal combustion engine having at least one combustion chamber which is adapted to be placed in communication with an intake opening during each intake event, comprising wall means forming a wave tube having a flow passage for a medium therein with one end open to the atmosphere and with the other end adapted to be placed in communication with the intake opening of the internal combustion engine, means forming an orifice disposed in the wall means forming the wave tube and opening into the flow passage therein, said flow passage being formed so that the maximum pressure effect at the orifice due to a shock wave generated by the engine in said medium in the flow passage is substantially greater than the maximum pressure effect at the orifice due to the velocity of said medium in the flow passage, said wall means forming a wave tube including a body, said body being formed with shock wave terminating means for preventing a shock wave from traveling substantially more than one round trip along the flow passage in the wave tube for each intake event, means for supplying fuel to the orifice so that the fuel will be introduced into the flow passage in the wave tube through the orifice substantially only in response to said pressure effects at the orifice, and throttle valve means disposed in the wave tube between the region in which the fuel is introduced into the flow passage in the wave tube and the intake opening of the internal combustion engine.
Claim 33
Dependent Claim
260 words
A fuel supply system for an internal combustion engine having at least one combustion chamber which is adapted to be placed in communication with an intake opening during each intake event, comprising wall means forming a wave tube having a flow passage for a medium therein with one end open to the atmosphere and with the other end adapted to be placed in communication with the intake opening of the internal combustion engine, means forming an orifice disposed in the wall means forming the wave tube and opening into the flow passage therein, said flow passage being formed so that the maximum pressure effect at the orifice due to a shock wave generated by the engine in said medium in the flow passage is substantially greater than the maximum pressure effect at the orifice due to the velocity of said medium in the flow passage, said wall means forming a wave tube including a body, said body being formed with shock wave terminating means for preventing a shock wave from traveling substantially more than one round trip along the flow passage in the wave tube for each intake event, means for supplying fuel to the orifice so that the fuel will be introduced into the flow passage in the wave tube through the orifice substantially only in response to said pressure effects at the orifice, and throttle valve means disposed in the wave tube between the region in which the fuel is introduced into the flow passage in the wave tube and the intake opening of the internal combustion engine.
Claim 34
Dependent Claim
74 words
In a method for introducing a fuel and air mixture into a combustion chamber of an internal combustion engine, in which a shock wave is generated during an intake event in a medium confined by wall means defining an intake passage, the improvement of sUbstantially terminating the progress of the shock wave after one round trip travel from and back to the engine of the shock wave in said medium for each intake event.
Claim 35
Dependent Claim
74 words
In a method for introducing a fuel and air mixture into a combustion chamber of an internal combustion engine, in which a shock wave is generated during an intake event in a medium confined by wall means defining an intake passage, the improvement of sUbstantially terminating the progress of the shock wave after one round trip travel from and back to the engine of the shock wave in said medium for each intake event.
Claim 36
Dependent Claim
29 words
A method as in claim 29 together with the step of introducing fuel into said medium substantially solely in a region adjacent the wall means defining an intake passage.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |