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US4317440A Expired / Lapsed US ⏱️ 0.0 years remaining

Single point dispersion system having a low profile carburetor

Assignee: Individual
•
Filing: 1980-02-04
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Granted: 1982-03-02
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Expires: 2000-02-04
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Abstract

Abstract This invention relates to a computer controlled fuel system for an internal combustion engine including a low profile carburetor for permitting engine operation on very lean fuel/air ratios without sacrificing engine performance during critical engine operations such as start up, warm-up and acceleration. The low profile carburetor provides a single point source fuel dispersion and includes one or more throttle controlled, sliding plates for increasing fuel entrainment at low engine speeds by increasing the velocity of the airstream flow through the carburetor just before the dispersion point and by maximizing the lateral distance between the point of fuel dispersion and the carburetor airstream. The computer controlled system includes various threshold circuits for providing additional fuel and/or water injection into the carburetor airstream upon detection of predetermined engine conditions.

Inventors

  • 👤 Arthur K. Thatcher
  • 👤 Ed R. McCarter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 20:39
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/041; F02B; F02B1/00; F02B3/00; F02D; F02D41/00; F02D41/02; F02D41/04; F02M27/00; F02M27/08; F02M9/00; F02M9/02

Claims Analysis

Total Claims: 20
Claim 1
Independent Claim 123 words
Fuel-air mixing apparatus for an internal combustion engine having an intake manifold and a throttle control for controlling the engine, comprising (a) passage means for forming an airstream passage for directing an airstream into said intake manifold; (b) fuel injection means for injecting fuel toward a dispersion point located within said airstream passage at which the fuel may be dispersed; and (c) airstream control means for displacing the airstream within said passage to increase the distance between said dispersion point and said airstream when the throttle control is adjusted so as to produce less engine speed and for permitting a decrease in the distance between said dispersion point and the airstream when the throttle control is adjusted so as to increase engine speed.
Claim 2
Dependent Claim 123 words
Fuel-air mixing apparatus for an internal combustion engine having an intake manifold and a throttle control for controlling the engine, comprising (a) passage means for forming an airstream passage for directing an airstream into said intake manifold; (b) fuel injection means for injecting fuel toward a dispersion point located within said airstream passage at which the fuel may be dispersed; and (c) airstream control means for displacing the airstream within said passage to increase the distance between said dispersion point and said airstream when the throttle control is adjusted so as to produce less engine speed and for permitting a decrease in the distance between said dispersion point and the airstream when the throttle control is adjusted so as to increase engine speed.
Claim 3
Dependent Claim 24 words
Apparatus as defined in claim 1, wherein said air stream control means includes an adjustable plate mounted for lateral movement through said airstream passage.
Claim 4
Dependent Claim 24 words
Apparatus as defined in claim 2, wherein said airstream control means includes a pair of adjustable plates mounted for lateral movement through said passage.
Claim 5
Dependent Claim 23 words
Apparatus as defined in claim 2, wherein said adjustable plate includes means for increasing the velocity of said airstream at low engine speeds.
Claim 6
Dependent Claim 38 words
Apparatus as defined in claim 4, wherein said means for increasing said airstream velocity includes a portion of said adjustable plate adjacent the leading edge which passes through said airstream passage, said portion containing at least one aperture.
Claim 7
Dependent Claim 17 words
Apparatus as defined in claim 5, wherein said plate includes a pair of apertures within said portion.
Claim 8
Dependent Claim 46 words
Apparatus as defined in claim 3, wherein said adjustable plates contain corresponding notches formed in the leading edges, said notches being positioned and form apertures adjacent the perimeter of said airstream passage when said adjustable plates and said throttle control is adjusted for low speed operation.
Claim 9
Dependent Claim 33 words
Apparatus as defined in claim 1, wherein said fuel injection means includes an electronic fuel computer means for electrically controlling the supply of fuel to said dispersion point in response to engine conditions.
Claim 10
Dependent Claim 33 words
Apparatus as defined in claim 8, wherein said fuel injection means includes at least one fuel injection nozzle responsive to signals from said fuel computer means to inject fuel toward said dispersion point.
Claim 11
Dependent Claim 40 words
Apparatus as defined in claim 9, further including a fuel dispersion surface located at said dispersion point, said dispersion surface being positioned so as to intercept and break apart the fuel injected into said passage from said fuel injection nozzle.
Claim 12
Dependent Claim 25 words
Apparatus as defined in claim 10, wherein said dispersion surface is mounted so as to vibrate, and further including means for vibrating said dispersion surface.
Claim 13
Dependent Claim 54 words
Apparatus as defined in claim 2, wherein said passage means includes first and second plates containing aligned apertures, said first plate including a groove formed in its surface adjacent to said second plate, said groove opening into the aperture in said first plate and said adjustable plate being disposed for movement within said groove.
Claim 14
Dependent Claim 48 words
Apparatus as defined in claim 1, in combination with an L-shaped intake manifold having an upper vertical leg and a lower horizontal leg connected with said upper vertical leg, said dispersion point being located adjacent the side of said vertical leg from which the lower horizontal leg extends.
Claim 15
Dependent Claim 91 words
Apparatus as defined in claim 1, further including an intake manifold for supporting said passage means, said manifold including upper and lower sections having vertically oriented passages connected with said airstream passage, said upper section containing said dispersion point adjacent one side, and an intermediate section having a passage interconnecting the passages of said upper and lower sections and extending in an acute angular direction relative to vertical, said dispersion point being positioned adjacent the side of the passage of said upper section toward which said intermediate section is angularly directed.
Claim 16
Dependent Claim 134 words
A single dispersion point fuel-air mixing apparatus for an internal combustion engine having an intake manifold, comprising (a) air stream control means for forming an airstream and for controlling the amount of air admitted to the intake manifold of the internal combustion engine; (b) fuel injection means for injecting liquid fuel toward a single dispersion point within the airstream formed by said airstream control means at which point fuel particles are formed and segregated within one portion of the airstream under certain airstream conditions; (c) airstream directing means for changing the direction of movement of the airstream to cause the fuel particles to be more evenly dispersed throughout a cross section of the airstream as it passes through the intake manifold due to the greater inertia of the fuel particle as compared with air.
Claim 17
Dependent Claim 134 words
A single dispersion point fuel-air mixing apparatus for an internal combustion engine having an intake manifold, comprising (a) air stream control means for forming an airstream and for controlling the amount of air admitted to the intake manifold of the internal combustion engine; (b) fuel injection means for injecting liquid fuel toward a single dispersion point within the airstream formed by said airstream control means at which point fuel particles are formed and segregated within one portion of the airstream under certain airstream conditions; (c) airstream directing means for changing the direction of movement of the airstream to cause the fuel particles to be more evenly dispersed throughout a cross section of the airstream as it passes through the intake manifold due to the greater inertia of the fuel particle as compared with air.
Claim 18
Dependent Claim 122 words
Apparatus as defined in claim 15, wherein said airstream directing means includes a first portion containing a first airstream passageway downstream from the fuel dispersion point and arranged to allow the airstream to pass therethrough when carrying the segregated fuel particles within a portion of the airstream offset from the longitudinal axis of said first passageway and a second portion containing a second airstream passageway downstream from said first airstream passageway, the longitudinal axis of said second airstream passageway being arranged with respect to the longitudinal axis of said first airstream passageway to cause the inertia of the fuel particles to more thoroughly mix the fuel particles with the airstream as the airstream moves from said first portion to said second portion.
Claim 19
Independent Claim 137 words
A method for mixing fuel and air for an internal combustion engine having an intake manifold, comprising the steps of: (a) forming an airstream for introduction into the intake manifold; (b) controlling the amount of air reaching the intake manifold by adjusting the size and velocity of the airstream; (c) injecting fuel toward a single dispersion point within the airstream formed in step (a) at which point fuel particles are formed and segregated whereby the fuel particles tend to be concentrated within one portion of the airstream under certain airstream conditions; and (d) redirecting the path of movement of the airstream to cause the fuel particles to be more evenly dispersed throughout a cross-section of the airstream as it passes through the intake manifold due to the greater inertia of the fuel particles as compared with air.
Claim 20
Independent Claim 137 words
A method for mixing fuel and air for an internal combustion engine having an intake manifold, comprising the steps of: (a) forming an airstream for introduction into the intake manifold; (b) controlling the amount of air reaching the intake manifold by adjusting the size and velocity of the airstream; (c) injecting fuel toward a single dispersion point within the airstream formed in step (a) at which point fuel particles are formed and segregated whereby the fuel particles tend to be concentrated within one portion of the airstream under certain airstream conditions; and (d) redirecting the path of movement of the airstream to cause the fuel particles to be more evenly dispersed throughout a cross-section of the airstream as it passes through the intake manifold due to the greater inertia of the fuel particles as compared with air.

References Cited (Backward Citations)

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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) 1985-03-01 1985-08-31 1986-03-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-03-01 1989-08-31 1990-03-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-03-01 1993-08-31 1994-03-02 $7700.00 Window Closed / Lapsed

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