US3906910A - Carburetor with feedback means and system - Google Patents

Carburetor with feedback means and system Download PDF

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Publication number
US3906910A
US3906910A US353579A US35357973A US3906910A US 3906910 A US3906910 A US 3906910A US 353579 A US353579 A US 353579A US 35357973 A US35357973 A US 35357973A US 3906910 A US3906910 A US 3906910A
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Prior art keywords
fuel
pressure
air
engine
venturi
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US353579A
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English (en)
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Jr Emil Szlaga
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Coltec Industries Inc
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Colt Industries Operating Corp
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Priority to US353579A priority Critical patent/US3906910A/en
Priority to FR7339996A priority patent/FR2226565B1/fr
Priority to IT53900/73A priority patent/IT997640B/it
Priority to ES421347A priority patent/ES421347A1/es
Priority to MX002559U priority patent/MX3262E/es
Priority to JP49009782A priority patent/JPS50239A/ja
Priority to DE2411874A priority patent/DE2411874A1/de
Priority to CA195,459A priority patent/CA1009527A/en
Priority to GB1216274A priority patent/GB1466947A/en
Priority to BR3255/74A priority patent/BR7403255D0/pt
Application granted granted Critical
Publication of US3906910A publication Critical patent/US3906910A/en
Priority to JP1977172649U priority patent/JPS53124936U/ja
Assigned to COLT INDUSTRIES INC., A PA CORP. reassignment COLT INDUSTRIES INC., A PA CORP. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 10/28/1986 PENNSYLVANIA Assignors: CENTRAL MOLONEY INC., A DE CORP., COLT INDUSTRIES OPERATING CORP., A DE CORP.
Assigned to COLTEC INDUSTRIES, INC. reassignment COLTEC INDUSTRIES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 05/03/1990 Assignors: COLT INDUSTRIES INC.
Assigned to BANKERS TRUST COMPANY reassignment BANKERS TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COLTEC INDUSTRIES INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0046—Controlling fuel supply
    • F02D35/0053—Controlling fuel supply by means of a carburettor
    • F02D35/0061—Controlling the emulsifying air only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/23—Fuel aerating devices
    • F02M7/24—Controlling flow of aerating air

Definitions

  • the invention as herein disclosed and described is primarily concerned with the general problem of being able to very closely and accurately meter the rate of flow of fuel and to vary such rate in response to atmospheric variations as well as engine operating parameters and more specifically to providing, by comparison, such means within a carbureting structure.
  • a carburetor for an internal combustion engine has induction passage means with air inlet means at one end thereof and outlet means at another end thereof, fuel supply and metering means communicating between a source of fuel and said induction passage means, and air bleed means (referred to as the dry system) effective for varying the pressure differential across said metering means to alter the rate of flow of fuel therethrough.
  • FIG. 1 is somewhat a diagrammatic representation of an internal combustion engine equipped with a carburetor embodying the teachings of the invention
  • FIG. 2 is an elevational cross-sectional view of a vari-
  • FIG. 3 is a graph depicting venturi vacuum compared to the rate of air flow
  • FIG. 4 is a graph depicting the fuel-air ratio (with fuel in terms of pounds and air in terms of cubic feet) compared to the rate of air flow in cubic feet;
  • FIG. 5 is a graph depicting the fuel-air ratio (with fuel in terms of pounds and air in terms of pounds) compared to the rate of air flow;
  • FIG. 6 is an elevational cross-sectional view of a fixed venturi type carburetor constructed in accordance with the invention.
  • FIG. 7 is a schematic representation of the metering concept of the invention.
  • FIG. 1 partly in schematic and partly in simplified pictorial, illustrates an internal combustion engine 10 having an intake manifold 12, with a carbureting structure 14 mounted thereatop, a multi-speed power output transmission assembly 16, and'an exhaust system 18 comprising an exhaust manifold 20, exhaust conduit means 22, 24 and 26 with a reduction-type reactor 28 and an oxidizing reactor 30 serially situated therein.
  • An oxygen sensor and transducer 32 may be placed in communication with exhaust conduit means 22, while engine speed sensing and transducer means 34 may be driven as by any suitable transmission means 36.
  • the carburetor structure 14 as shown in FIG. 2, is illustrated as comprising a body or housing means 38 with an induction passage 40 formed therethrough with such induction passage 40 having an air inlet end 42 and an outlet or discharge end 44 leading to an inlet 46 of the interior 48 of the intake manifold 12 of the associated internal combustion engine 10.
  • a variably positionable throttle valve 50 mounted as on a throttle shaft 52 for pivotal rotation therewith, is situated within the induction passage and effective for controlling the flow of motive fluid or combustible mixture from said induction passage 40 into the intake passage 48 of manifold 12.
  • such combustible mixture will, of course, be comprised of atmospheric air admitted into inlet end 42 and fuel supplied to the in duction passage 40 from an associated fuel reservoir or fuel bowl assembly 54.
  • the fuel bowl assembly 54 is illustrated as comprising a suitable bowl or housingstructure 56 which may contain a float member 58 controlling an associated fuel inlet needle valve assembly (not shown but well known in the prior art) so as to maintain the level of the fuel 60 within the bowl 56 at a preselected level as at 62.
  • a variable venturi may be comprised of a variably positionable venturi plate 64 which may be fixedly secured as by fastener means 66 and 68 to an internally disposed arm 70 which, in turn, is fixedly secured to a rotatable shaft 72 journalled in the housing means 38.
  • the venturi arrangement may be such as to define a generally rectangular opening at the throat of the variable venturi when viewed, for example, in the direction of arrow 74.
  • opposite walls one of which is shown at 76, may define flat planar surfaces permitting the variable or movable venturi plate 64 to be closely received therebetween for swingable motion about the centerline of rod or shaft 72.
  • Such flat or planar surfaces would preferably terminate as at a boundary line 78 from which the portion of the induction passage means 40 downstream may transitionally change configuration until it became circular to accommodate a generally circular throttle valve 50 if such configuration thereof is employed.
  • a second lever 80 which may be situated generally outboard of the housing means 38, is fixedly secured as at one end to shaft 72 for rotation therewith and has its swingable arm portion connected as to linkage means or rods 82 and 84.
  • Rod 84 comprises a portion of a dashpot assembly 86 which is illustrated as having an internal cylindrical chamber 88 containing therein a suitable fluid and a slidable piston member 90 through which the rod 84freely extends as to be abutingly engageable therewith at its lower portion 92.
  • a compression spring 94 also contained within chamber 88 continually resiliently urges piston 90 downwardly.
  • Suitable sealing means such as at 96 may be provided for preventing the escape of damping fluid from chamber 88.
  • piston 90 As piston 90 is moved upwardly by rod 84, the fluid in chamber 88 above the piston 90 is forced to a position below the piston 90. This may be done as by calibrated bleed means 98 formed through piston 90 or any other such equivalent means well known in the art.
  • Levers 100 and 106 respectively have arm portions 110 and 112 which carry generally transversely extending abutment portions 114 and 116.
  • a torsion spring 118 having'its main coil generally about shaft 52, has its arms 120 and 122 respectively operatively engaged with lever arm portions 110 and 112 as to thereby normally resiliently maintain abutments 114 and 116 engaged with each other resulting in unitary motion of levers 100 and 106.
  • Suitable vent passage means 124 has a first end 126 communicating with a suitable source of atmospheric pressure (or some source indicative of such atmospheric pressure), and has its other end 128 communieating with the interior 140 of the fuel bowl 56.
  • Fuel delivery and metering means is illustrated as preferably comprising passagcor conduit means 130 communicating with the fuel bowl 56 as at 132 and with a second generally transversely disposed fuel delivery conduit means 134 which has an end 138 communicating with induction passage 40 preferably at a point immediately downstream of venturi throat portion 136 of a fixed venturi section 137.
  • Calibrated passage or orifice means 142 may be suitably contoured so as to cooperate with a contoured metering portion 144 of a needle-like valve member 146 which may be pivotally secured as by a pivot member 148 to the movable venturi plate or section 64 as within a recess 150 formed therein.
  • the operation of the carburetor 14 is generally as follows. That is, if it is assumed that the associated engine is operating, as foot throttle pedal 103 is moved counter-clockwiseabout pivot 105 linkage 102 is moved to the right causing levers 100 and 106, shaft 52 and throttle valve 50 to rotate generally counter-clockwise about the eenterline of shaft 50 in the throttle valve opening direction. Such opening movement or motion is transmitted via cooperating linkage means 82 to lever 80 which rotates generally counter-clockwise about the centerline of shaft 72 causing corresponding motion of lever 70 and movable venturi means 64.
  • abutment portions 114 and 116 of levers 100 and 106 will momentarily separate from each other against the resistance of spring 118 and will subsequently return to their abutting condition once sufficient travel of linkage 82 and lever 80 is permitted by the time delay or dash'pot means 86.
  • Such time delay means 86 is preferably provided to overcome a condition which may be referred to as fuel lag. That is, between the fuel and air, fuel has a greater density and therefore greater inertia. Consequently, if the venturi plate 64 were to be rapidly opened, the volume rate of air flow would respond to the newly indicated desired rate of air flow much more rapidly than would the fuel. If this were to occur, the ratio of the fuel-air mixture might well become too lean'(in terms of fuel) causing improper engine operation. Accordingly, by providing such time-delay means 76, a maximum rate of opening movement of variable venturi plate 64 is established as to make sure that the fuel flow will have sufficient time to correspondingly respond to the indicated change in demand for rate of fuel flow.
  • the rate of fuel flow from fuel bowl 56 to the induction passage 40 is primarily dependent upon the metering pressure differential AP (often referred to as metering depression) determined by the difference of P,, P,. where P, is the pressure above the fuel 60 within fuel bowl 56 and P,. is the effective pressure (often referred to as venturi vacuum) in the induction passage 40 at or slightly downstream of the venturi throat as generally depicted by the'variable dimension, D.
  • AP metering pressure differential
  • venturi vacuum or reduced pressure generated at the venturi throat is actually dependent on the velocity of flow of air through such venturi throat.
  • rate of flow of air is usually referred to in terms of a volume rate of flow because the rate of flow of air described in either terms of volume rate of flow or velocity rate of flow is the same since velocity and volume are directly related.
  • the venturi throat area is variable in accordance with the variable dimension, D. Therefore, the velocity rate of flow of air through the variable venturi throat is not directly related to the volume rate of flow of air at all positions of the movable venturi plate 64.
  • the movable venturi plate 64 is placed at a relatively close distance with respect to the fixed venturi section 137 during idle engine operation (as for purposes of illustration might be considered to be depicted by the positions of the various ele ments hereinbefore referred to and shown in FIG. 2) to thereby create a metering vacuum or pressure P,. sufficient to cause metered fuel flow through passage means 130 and 134 into the induction passage 40 even though the volume rate of air flow at this condition of engine operation is, relatively, very small.
  • FIG. 3 graphically depicts characteristic curves, of a fixed venturicarburetor and a variable venturi carburetor, attained by plotting the generated venturi vacuum against the volume rate of air flow in each of said carburetors.
  • Curve A represents the curve characteristically developed by a fixed venturi carburetor while curve B characteristically represents a curve developed by a variable venturi carburetor.
  • curves A and B which of course must each originate at the zero point, intersect at a point 150.
  • vertical dash-line 152 is assumed to represent a typical air flow for a particular engine at curbidle operation, it can be seen that line 152 intersects curves B and A respectively at points 154 and 156 and that point 154 represents a substantially greater magnitude of generated venturi vacuum than that represented by point 156.
  • curve B represents venturi vacuum values greater than those vacuum values represented by corresponding portion of curve A.
  • the con trol means 160 may be comprised of a housing portion 164 containing various control means such as solenoid operated valve assemblies 166, 168 and 170 along with manually positionable adjusting means 172 and ambient pressure responsive means 174.
  • Solenoid valving assembly 166 may be of the twoposition type comprising housing means 176, containing solenoid means having electrical terminals 178 and 180.
  • the housing means 176 may be threadably engaged as at 182 with housing portion 164 in a manner placing stem and valve portion 184 in closed position against conduit means 186 so as to thereby prevent communication between conduit means 186 and chamber 188 which generally contains valve 184.
  • Solenoid valving assembly 168 may be of the proportional type, wherein movement of the associated valving member is generally proportional to the strength of the signal applied to the solenoid portion thereof, comprising housing means 190, containing solenoid means having electrical terminals 192 and 194.
  • the housing means may be threadably engaged as at 196 with housing portion 164 in a manner placing valving portion 198 in closed position against conduit means 200 so as to thereby prevent communication between conduit means 200 and chamber 202 which generally con tains valving means 198.
  • Solenoid valving assembly 170 may be of the twoposition type comprising housing means 204 containing solenoid means having electrical terminals 206 and 208.
  • the housing means 204 may be threadably engaged as at 210 with housing portion 164 in a manner placing stem and valve portion 212 in closed position against conduit means 214 so as to thereby prevent communication between conduit means 214 and chamber 216 which generally contains valving means 212.
  • conduit means 218 and 220 may be interconnected as by conduit means 218 and 220 ultimately leading to conduit means 222 which, as at 224, is in communication with the ambient atmosphere or a suitable source related thereto.
  • the manually adjustable means 172 is illustrated as comprising a threadably axially adjustable body 226 carrying therewith a valving portion 228 adapted to cooperate as with a seat portion 230 to vary the effective flow area as between a chamber portion 232 and conduit means 234.
  • chamber 232 is in communication with ambient atmosphere as by means of conduit portion 236 while conduit means 234 is in communication with conduit means 162, 186, 200 annd 214 as well as with conduit means 238 leading generally to the altitude responsive means 174.
  • the ambient pressure and altitude responsive means 174 may be comprised of a threadably axially adjustable evacuated bellows assembly 240, situated as within a chamber 242, having one end 244 threadably secured to housing portion 164 and another end 246 operatively connected to a lever means 248 having one end pivotally secured as at 250 and another end 252 swingable and operatively connected to a valving member 254 slidable within guide passage 256.
  • Valving member 254 may include a body 258 of generally diamond shape, in transverse cross-section, thereby permitting unrestricted flow therepast.
  • a valving portion 260 is adapted to cooperate with a suitable seat 262 to control the flow therebetween and through conduit means 238.
  • Chamber 242 may be suitably vented to the ambient atmosphere as by vent means.
  • conduit means 162 at one end communicates with conduit means 234 while at its other end it communicateswith an area generally forwardly of the calibrated orifice means 142. Such area may be determined as by a chamber-like portion 266 generally between calibrated orifice means 142 and discharge orifice means 138.
  • valves 260, 228, 184, 198 and 212 are all closed, it can be seen that during operation of the engine the value of the variable pressure P,. within chamber 266 will be substantially equal to the value of the variable pressure P,. generated in the venturi throat and would follow curve B of FIG. 3. Further, this particular assumed condition would result in a first fuel-air ratio generally depicted as by curve 270 of FIG. 4 wherein vertical line 272 corresponds to line 152 of FIG. 3.
  • the value of P,. may be depicted generally by the dash-line curve 276 of FIG. 3 because, as far as the actual effective flow area of orifice means 142 is concerned, it is lead to believe that the actual sensed value of P,. is actually the generated venturi pressure.
  • the fuel-air ratio is determined in terms of weight-rate of flow of fuel and volume-rate of flow of air, as in the graph of FIG. 4, it becomes apparent that with diminished atmospheric pressure as by an increase in altitude the density of the air flowing through the induction passage 40 is decreased therefor requiring a reduction in the rate of metered fuel flow even though the generated venturi vacuum may ordinarily indicate otherwise. That is, as compared to, for example, a sealevel fuel-air ratio curve 274, the required or proper fuel-air ratio curve at some increased elevation may be as indicated by the dash-line curve 278.
  • valving means 168 is like 174 in the respect that each are proportional type means capable of progressively varying the degree of air bleed in accordance with a predetermined schedule or input parameters.
  • valving means 166 and 170 are of the on-off type providing only for either a closed or opened air bleed condition. The effect of such air bleed through any or all of such valving or control means is as described in detail with reference to means 172 and Operation of Invention Within a Typical Environment
  • FIG. 1 includes fragmentarily illustrated valving means 166, 168 and 170.
  • Speed sensing and responsive means 34 is effective for producing a signal, N.
  • transducer means 284 Upon the proper value or magnitude of signal N being generated, transducer means 284 becomes effective, as via conductor means 286, for energizing valving means 166 so as to thereby move valving member 184 (FIG. 2) to the left opening airbleed passage 186.
  • the oxygen sensor means 32 may continually provide a signal, 0, along suitable signal-conveying transmission means 288 leading to suitable related transducer means 290.
  • transducer means 290 Whenever the value or magnitude of the signal, 0, (which may be considered as being the relative amount of carbonmonoxide) exceeds a predetermined amount, transducer means 290 becomes effective to, via conductor means 292, energize valving means 168 so as to thereby move valving member 198 some degree to the left generally in accordance with the magnitude of signal (to the left for leaner mixtures and to the right for richer mixtures) thereby variably opening the air-bleed passage means 200.
  • Valving means 170 is illustrated as being actuable or controlled by either of two transducer means 298 and 296 via conductor means 294 and 300.
  • Transducer 296 is responsive to a signal, M, indicative of engine intake manifold pressure (or vacuum) which may be transmitted via signal transmission means 302. Whenever the engine undergoes deceleration, the throttle valve 50 will be closed and the manifold vacuum then exceeds the value of manifold vacuum generated at idle engine operation. Accordingly, when such signal, M, indicates that the engine is experiencing deceleration, transducer means 296 becomes effective to cause valve member 212 of valving means 170 to move to the left thereby opening air-bleed passage means 214.
  • transducer means 298 is responsive to the closure and/or opening of, for example, the vehicle ignition switch 304 (a portion of a related ignition circuit is illustrated at 306 while a related source of electrical potential is shown at 308).
  • the general operation is that when the ignition switch 304 is opened, transducer means 298 becomes effective to also cause valve member 212 of valving means 170 to move to the left thereby opening air-bleed passage means 214.
  • the oxides of nitrogen will react with some of the carbon monoxide to produce free molecular nitrogen and carbon dioxide with some additional quantities of carbon monoxide and, for example, methane remaining.
  • the free nitrogen and carbon dioxide is passed to atmosphere without further reaction while the methane (and other such exhaust gases) and remaining carbon monoxide are then oxidized in the second stage as for example reacting and producing carbon dioxide and free water.
  • Valving means 170 is normally closed with the term normally designating engine operating conditions other than engine operating conditions other than engine shut-down or engine deceleration. That is, during conditions of engine deceleration when the magnitude of the manifold pressure signal M is sufficiently low, in terms of pressure, or high in terms of vacuum, transducer means 296 causes valve member 212 of valving means 170 to open air-bleed passage means 214 thereby, as previously described, increasing the value of pressure P,. and.
  • valving means 170 may also be employed to thereby lean-out the fuel-air mixture which might flow at the instant of engine shutdown to thereby prevent the occurrence of the condition often referred to as engine dieseling. That is, when ignition switch 304 is opened transducer means 298 becomes effective for causing valve member 212 of valving means 170 to again move and open the airbleed passage means 214 with the result that point 316 of FIG. 3 and point 318 of FIG. 4 are again achieved. Since at this time the fuel-air ratio is such as to be inca pable of supporting combustion, the engine is prevented from dieseling after the ignition is turned off.
  • a carburetor type fuel delivery system includes closed loop type feedback means effective for varying the fuel-air ratio of the fuel-air mixture supplied by such carburetor in accordance with operating parameters indicative of any produced by the engine itself.
  • the invention can be practiced equally well with a carbureting structure of the fixed venturi type.
  • the carburetor assembly 320 is illustrated as comprising body or housing means 322 with an induction passage 324 formed therethrough and having an air inlet end 326, which may be controlled as by a variably positionable choke valve 328, and an outlet end 330 with a variably positionable throttle valve 332 therein for controlling the flow of combustible mixtures into the inlet 334 of the intake manifold chamber 336 of the engine intake manifold 338 (which may in fact be as manifold 12 of FIGS. 1 and 2).
  • the carburetor assembly may be provided with an idle fuel system 340 and a main fuel system 342, as are generally well known in the art, wherein the fragmentarily illustrated idle fuel system 340 is comprised of fuel delivery conduit means 344, leading to the fuel 346 within an associated fuel reservoir or supply means 348, and communicating with the induction passage 324 as via passage means 350 and 352 with passage means 250 providing for idle fuel flow to the induction passage posterior (downstream) of the throttle valve 332 when such is in the closed idle position as shown.
  • the fragmentarily illustrated idle fuel system 340 is comprised of fuel delivery conduit means 344, leading to the fuel 346 within an associated fuel reservoir or supply means 348, and communicating with the induction passage 324 as via passage means 350 and 352 with passage means 250 providing for idle fuel flow to the induction passage posterior (downstream) of the throttle valve 332 when such is in the closed idle position as shown.
  • Passage means 352 is effective for providing increasing amounts of fuel flow as the throttle valve 332 is rotated clockwise in the throttle opening direction as during periods of off-idle engine operation,
  • the main fuel metering system 34 may be comprised of a fuel dis charge nozzle 354, situated generally in the throat 356 of the fixed venturi section 358, having orifice means 260 leading to fuel delivery conduit means 362 communicating with the fuel 346 as through calibrated orifice or restriction means 364.
  • a fuel dis charge nozzle 354 situated generally in the throat 356 of the fixed venturi section 358, having orifice means 260 leading to fuel delivery conduit means 362 communicating with the fuel 346 as through calibrated orifice or restriction means 364.
  • the carburetor assembly 320 is provided with the control means 160, described in detail with reference to the preceding Figures, so as to have the bleed-air conduit 162 communicating with fuel supply passage means 362.
  • the operation would, of course, be as that described with reference to FIGS. 1 and 2 with the result that a closed loop feedback carbureting system would again be achieved.
  • FIG. 6 and the control means 160 may be modified as by providing passage means 366 in housing means 322 communicating with idle fuel supply passage means 344 and to in effect isolate air bleed passage 214 (FIG. 2) from conduits 200 and 162 as by placing suitable blockage in conduit 234 between eonduit 214 and conduits 200 and 162.
  • a second air-bleed conduit 162a functioning generally as does conduit 162, would be connected as to then communicate between conduit 214 and conduit 366.
  • a pressure P is developed by the velocity rate of air flow to an engine; pressure P is atmospheric pressure; pressure P is the pressure applied to the fuel, in this case P and P are assumed to be equal
  • means such as at 160 sensitive to engine and/or vehicle operating parameters to vary the actual available metering pressure differential of P P,- to more accurately satisfy the needs of the engine at such sensed parameters as by variably restricting (by means depicted at 370 and equivalent to the valving means of control 160) the flow of ambient air to create a control pressure P and thereby develop an actual and variable metering pressure differential of P P which when applied across the related calibrated metering orifice means, as depicted at 372, will provide for precisely the proper rate of metered fuel flow to the discharge area generally designated at 374 in which the relatively lower pressure P, exists.
  • a carburetor type fuel metering device for an internal combustion engine, of the type having induction passage means with venturi means carried therein for creating a reduced first pressure proportional to the square of the flow of air therethrough, a fuel bowl, a
  • a fuel metering device according to claim 1 wherein said indicia comprises. means responsive to conditions of engine deceleration.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to conditions of engine speed.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to conditions indicative of engine shut-down.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to conditions of engine intake manifold pressure.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to the presence of oxygen within the exhaust gases of said engine.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to conditions of engine deceleration and enginespeed.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to conditions of engine deceleration, engine speed and en gine shut-down.
  • a fuel metering device comprises means responsive to conditions of engine deceleration, engine speed, engine shut-down and the presence of oxygen within the exhaust gases of said engine.
  • a fuel metering device according to claim 1 wherein said indicia comprises means responsive to atmospheric pressure.
  • a fuel metering device according to claim 1 and further comprising further manually adjustable means for manually modifying the effective magnitude of said first pressure.
  • a fuel metering device according to claim 1 wherein said additional means comprises air-bleed means communicating generally between a source of relatively high pressure air and the vicinity in which said first pressure exists.
  • a fuel metering device comprising air-bleed means communicating generally between a source of relatively high pressure air and the vicinity in which said first pressure exists, and valving means responsive to said indicia of engine operation for variably opening and closing said air-bleed means generally in accordance with said indicia of engine operation.
  • venturi means comprises variable venturi means.
  • a carburetor for an internal combustion engine comprising body means, induction passage means with a venturi restriction formed through said body means and having air inlet means formed at one end thereof and outlet means formed at another end thereof, a throttle valve disposed in said inducation passage downstream from said venturi restriction, first means for creating a fuel metering pressure by creating a first relatively low metering pressure of variable magnitude proportional to the square of the velocity of flow of air through said induction passage venturi restriction means.
  • fuel metering means communicating between a source of fuel and said induction passage means, said fuel metering means being so positioned as to have one end thereof generally exposed to said fuel metering pressure in order to in response to the magnitude thereof cause a metered rate of fuel flow to said inducation passage means, said carburetor being free of fuel pressurizing means for pressuring said main fuel at pressures appreciably above atmospheric pressure, and air bleed means communicating generally between a source of relatively high, substantially atmospheric pressure air and said one end of said fuel metering means, said air bleed means being effective to bleed said high pressure air in order to effectively increase the magnitude of said fuel metering pressure, thereby decreasing the metering depression, without modifying the magnitude of said first relatively low pressure and thereby reduce the rate of metered fuel flow to said in duction passage.
  • said air bleed means comprises variably openable air bleed passage means the effective opening of which is controlled generally in response to atmospheric pressure.
  • a carburetor type fuel metering system for an internal combustion engine, wherein fuel is metered through calibrated restriction means from a source of fuel to induction passage means communicating with said engine, wherein a first relatively high, substantially atmospheric pressure is applied to said source of fuel, wherein a second relatively low, subatmospheric pressure of variable magnitude is created to be indicative of the air flowing to said engine, and wherein the difference in magnitudes between said first and second pressures is employed for creating a fuel metering pressure differential generally across said source of fuel and said calibrated restriction means causing metered fuel flow, the improvement of forming chamber-like means generally downstream of said calibrated restriction means and at least at times variably bleeding air thereto so as to thereby create a third pressure within said chamberlike means with said third pressure being greater in magnitude than said second pressure, and means responsive to conditions of engine operation for controlling the degree of such air bled to said chamber-like means.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US353579A 1973-04-23 1973-04-23 Carburetor with feedback means and system Expired - Lifetime US3906910A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US353579A US3906910A (en) 1973-04-23 1973-04-23 Carburetor with feedback means and system
FR7339996A FR2226565B1 (enrdf_load_stackoverflow) 1973-04-23 1973-11-09
IT53900/73A IT997640B (it) 1973-04-23 1973-11-26 Perfezionamento nei carburatori per motori a combustione interna
ES421347A ES421347A1 (es) 1973-04-23 1973-12-11 Un dispositivo dosificador de combustible mejorado, para unmotor de combustion interna.
MX002559U MX3262E (es) 1973-04-23 1974-01-18 Mejoras en carburador con re alimentacion y medicion de combustible
JP49009782A JPS50239A (enrdf_load_stackoverflow) 1973-04-23 1974-01-24
DE2411874A DE2411874A1 (de) 1973-04-23 1974-03-12 Kraftstoffvergaser mit regeleinrichtung fuer eine verbrennungskraftmaschine
CA195,459A CA1009527A (en) 1973-04-23 1974-03-19 Carburetor with feedback means and system
GB1216274A GB1466947A (en) 1973-04-23 1974-03-19 Variable venturi carburetor for an internal combustion engine
BR3255/74A BR7403255D0 (pt) 1973-04-23 1974-04-23 Aperfeicoamento em dispositivo para medicao de combustivel em carburador e em sistema para medicao de combustivel para um motor de combustao interna
JP1977172649U JPS53124936U (enrdf_load_stackoverflow) 1973-04-23 1977-12-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US353579A US3906910A (en) 1973-04-23 1973-04-23 Carburetor with feedback means and system

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CA (1) CA1009527A (enrdf_load_stackoverflow)
DE (1) DE2411874A1 (enrdf_load_stackoverflow)
ES (1) ES421347A1 (enrdf_load_stackoverflow)
FR (1) FR2226565B1 (enrdf_load_stackoverflow)
GB (1) GB1466947A (enrdf_load_stackoverflow)
IT (1) IT997640B (enrdf_load_stackoverflow)
MX (1) MX3262E (enrdf_load_stackoverflow)

Cited By (64)

* Cited by examiner, † Cited by third party
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US3978175A (en) * 1975-05-12 1976-08-31 General Motors Corporation Engine air-fuel ratio control means
US4010722A (en) * 1974-12-20 1977-03-08 Laprade Bernard Metering control for the air-fuel mixture in internal combustion engines
US4010723A (en) * 1975-10-15 1977-03-08 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas cleaning apparatus for an internal combustion engine for a vehicle
US4023357A (en) * 1974-12-24 1977-05-17 Nissan Motor Co., Ltd. System to control the ratio of air to fuel of the mixture delivered to an internal combustion engine
US4039638A (en) * 1975-02-22 1977-08-02 Lucas Electrical Limited Fuel supply system for an internal combustion engine
US4058978A (en) * 1974-03-31 1977-11-22 Wilfried Bockelmann Regulating device for metering a supplementary air quantity to improve combustion in combustion engines
US4065920A (en) * 1975-03-07 1978-01-03 Hidehiro Minami Two barrel carburetor
US4075837A (en) * 1975-06-18 1978-02-28 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purifying system for an internal combustion engine
US4078379A (en) * 1975-03-25 1978-03-14 Hidehiro Minami Exhaust gas purifying system
US4079714A (en) * 1975-03-31 1978-03-21 Nissan Motor Company, Ltd. Air-fuel mixture supply device of internal combustion engine
US4083338A (en) * 1976-02-04 1978-04-11 Robert Bosch Gmbh Apparatus for controlling the fuel-air mixture of an internal combustion engine
US4086890A (en) * 1975-04-10 1978-05-02 Nissan Motor Company, Limited Carburetor with altitude compensation assembly
US4090477A (en) * 1976-09-03 1978-05-23 Cragar Industries, Inc. Method of improving operation of internal combustion engines
US4100234A (en) * 1977-02-11 1978-07-11 Acf Industries, Inc. Air metering apparatus
US4105726A (en) * 1977-02-11 1978-08-08 Acf Industries, Inc. Solenoid apparatus
US4108121A (en) * 1975-03-24 1978-08-22 Hidehiro Minami Closed loop mixture control system using a two-barrel carburetor
US4107920A (en) * 1974-11-13 1978-08-22 Nissan Motor Company, Limited Method of and apparatus for controlling air/fuel ratio in internal combustion engine
FR2380432A1 (fr) * 1977-02-14 1978-09-08 Colt Ind Operating Corp Dispositif et montage electrique pour regler la richesse du melange alimentant un moteur a explosion
US4114372A (en) * 1975-06-13 1978-09-19 Nissan Motor Company, Limited Internal combustion engine with air-fuel ratio control device
FR2384955A2 (fr) * 1977-02-14 1978-10-20 Colt Ind Operating Corp Dispositif et montage electrique pour regler la richesse du melange alimentant un moteur a explosion
DE2819809A1 (de) * 1977-05-06 1978-11-16 Sibe Vorrichtung zur kraftstoffversorgung einer brennkraftmaschine
US4128088A (en) * 1976-05-10 1978-12-05 Colt Industries Operating Corp. Apparatus and system for controlling the air-fuel ratio supplied to a combustion carburetor
US4132199A (en) * 1976-07-12 1979-01-02 Hitachi, Ltd. Air-fuel ratio control apparatus
US4135482A (en) * 1976-05-10 1979-01-23 Colt Industries Operating Corp Apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
US4144855A (en) * 1976-06-09 1979-03-20 Toyota Jidosha Kogyo Kabushiki Kaisha Device for controlling the air-fuel ratio of a mixture
US4148848A (en) * 1977-10-21 1979-04-10 Toyota Jidosha Kogyo Kabushiki Kaisha Air bleed type carburetor
US4149376A (en) * 1975-04-21 1979-04-17 Nissan Motor Company, Limited Internal combustion engine equipped with exhaust gas purifying device
US4150641A (en) * 1977-02-28 1979-04-24 Toyota Jidosha Kogyo Kabushiki Kaisha Arrangement for controlling an air-fuel ratio of an air-fuel mixture of an internal combustion engine
US4150645A (en) * 1977-08-19 1979-04-24 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4153652A (en) * 1977-09-30 1979-05-08 Toyota Jidosha Kogyo Kabushiki Kaisha Altitude compensating system of a carburetor mounted on a vehicle
US4153021A (en) * 1973-06-04 1979-05-08 Nippon Soken, Inc. Air-fuel mixture ratio correcting system for carburetor
US4169439A (en) * 1977-03-21 1979-10-02 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4173956A (en) * 1976-11-30 1979-11-13 Nissan Motor Company, Limited Closed loop fuel control in accordance with sensed engine operational condition
US4175103A (en) * 1978-04-17 1979-11-20 General Motors Corporation Carburetor
US4178332A (en) * 1978-01-11 1979-12-11 General Motors Corporation Carburetor and method of calibration
US4181108A (en) * 1977-02-07 1980-01-01 Edoardo Weber - Fabbrica Italiana Carburatori S.p.A. System for the control of the composition of the fuel-air mixture of an internal combustion engine
US4187814A (en) * 1978-02-16 1980-02-12 Acf Industries, Incorporated Altitude compensation apparatus
US4208358A (en) * 1977-05-27 1980-06-17 General Motors Corporation Carburetor and method of calibration
US4209981A (en) * 1975-05-16 1980-07-01 Nissan Motor Company, Limited Method and an apparatus to control the temperature of an engine exhaust gas purifying device
US4217314A (en) * 1978-06-26 1980-08-12 General Motors Corporation Carburetor and method of operation
US4223651A (en) * 1979-02-06 1980-09-23 Colt Industries Operating Corp Solenoid vacuum control valve means and apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
US4229387A (en) * 1978-12-26 1980-10-21 Ford Motor Company Carburetor fuel flow control valve assembly
US4233811A (en) * 1975-05-30 1980-11-18 Kenji Masaki Exhaust gas reaction control system
US4245603A (en) * 1979-04-30 1981-01-20 General Motors Corporation Adaptive vehicle engine closed loop air and fuel mixture controller
EP0023632A1 (en) * 1979-07-20 1981-02-11 Hitachi, Ltd. Method for controlling the amount of fuel supply for an engine
US4251472A (en) * 1978-07-19 1981-02-17 Pierburg Gmbh & Co. Kg Carburetor for combustion engines
US4256293A (en) * 1979-05-29 1981-03-17 Tom Mcguane Industries, Inc. Throttle control dash pot
USRE30622E (en) * 1978-04-17 1981-05-26 Teledyne Industries, Inc. Fuel metering apparatus for a carburetor
US4279231A (en) * 1977-02-11 1981-07-21 Acf Industries, Incorporated Apparatus for controlling the air-fuel ratio in an internal combustion engine
US4291658A (en) * 1975-02-05 1981-09-29 Nissan Motor Company, Limited Automotive engine carburetor
US4350129A (en) * 1976-10-01 1982-09-21 Nissan Motor Company, Limited Spark-ignition internal combustion engine capable of preventing noxious gas emissions
US4366793A (en) * 1980-10-24 1983-01-04 Coles Donald K Internal combustion engine
US4457279A (en) * 1982-02-16 1984-07-03 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device of a variable venturi-type carburetor
US4461732A (en) * 1983-01-21 1984-07-24 General Motors Corporation Engine air induction system
US4472321A (en) * 1981-11-06 1984-09-18 Toyota Jidosha Kabushiki Kaisha Altitude compensation apparatus for carburetor
US4563990A (en) * 1982-11-24 1986-01-14 Honda Giken Kogyo Kabushiki Kaisha Fuel supply control system for engine carburetors
US5258143A (en) * 1992-07-10 1993-11-02 Wang Ming Ching Carburetor with a cam-controlled venturi
US6394426B1 (en) * 2000-07-07 2002-05-28 Walbro Corporation Engine dual fuel supply apparatus
US6615792B1 (en) * 2002-05-06 2003-09-09 Walbro Engine Management Llc Carburetor fuel shut-off system
US20040011341A1 (en) * 2002-07-18 2004-01-22 Seiji Asano Engine air-fuel ration control method with venturi type fuel supply device and fuel control appliance including the method
US20040195705A1 (en) * 2003-04-03 2004-10-07 Burns Michael P. Carburetor
US20050146061A1 (en) * 2003-04-03 2005-07-07 Burns Michael P. Carburetor and method of manufacturing
EP1101927A4 (en) * 1998-08-05 2007-05-02 Honda Motor Co Ltd DEVICE FOR CONTROLLING THE AIR / FUEL INLET MIXTURE OF AN OUTBOARD ENGINE
US11391381B2 (en) 2017-12-08 2022-07-19 Samson Aktiengesellschaft Control valve assembly and method for operating a control valve assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505723A (enrdf_load_stackoverflow) * 1973-05-23 1975-01-21
JPS5025938A (enrdf_load_stackoverflow) * 1973-07-11 1975-03-18
DE2505339C2 (de) * 1975-02-08 1984-08-09 Daimler-Benz Ag, 7000 Stuttgart Gemischverdichtender Verbrennungsmotor mit zwei Zylinderreihen und Abgasnachbehandlung
GB0013607D0 (en) 2000-06-06 2000-07-26 Johnson Matthey Plc Emission control

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US2957464A (en) * 1956-06-18 1960-10-25 Gen Motors Corp Fuel injection system
US2914051A (en) * 1957-05-09 1959-11-24 Gen Motors Corp Signal modifier for fuel injection system
US2860617A (en) * 1957-06-21 1958-11-18 Gen Motors Corp Enrichment device for fuel injection system
US3243167A (en) * 1962-06-04 1966-03-29 Bendix Corp Constant vacuum type carburetor
US3301536A (en) * 1964-06-19 1967-01-31 Su Carburetter Co Ltd Carburetters for internal combustion engines
US3667741A (en) * 1968-01-25 1972-06-06 British Leyland Austin Morris Carburetters for internal combustion engines
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US3756208A (en) * 1969-02-05 1973-09-04 Nissan Motor Apparatus for reducing hydrocarbon content of exhaust gases during deceleration
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Cited By (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153021A (en) * 1973-06-04 1979-05-08 Nippon Soken, Inc. Air-fuel mixture ratio correcting system for carburetor
US4058978A (en) * 1974-03-31 1977-11-22 Wilfried Bockelmann Regulating device for metering a supplementary air quantity to improve combustion in combustion engines
US4107920A (en) * 1974-11-13 1978-08-22 Nissan Motor Company, Limited Method of and apparatus for controlling air/fuel ratio in internal combustion engine
US4010722A (en) * 1974-12-20 1977-03-08 Laprade Bernard Metering control for the air-fuel mixture in internal combustion engines
US4023357A (en) * 1974-12-24 1977-05-17 Nissan Motor Co., Ltd. System to control the ratio of air to fuel of the mixture delivered to an internal combustion engine
US4291658A (en) * 1975-02-05 1981-09-29 Nissan Motor Company, Limited Automotive engine carburetor
US4039638A (en) * 1975-02-22 1977-08-02 Lucas Electrical Limited Fuel supply system for an internal combustion engine
US4065920A (en) * 1975-03-07 1978-01-03 Hidehiro Minami Two barrel carburetor
US4108121A (en) * 1975-03-24 1978-08-22 Hidehiro Minami Closed loop mixture control system using a two-barrel carburetor
US4078379A (en) * 1975-03-25 1978-03-14 Hidehiro Minami Exhaust gas purifying system
US4079714A (en) * 1975-03-31 1978-03-21 Nissan Motor Company, Ltd. Air-fuel mixture supply device of internal combustion engine
US4086890A (en) * 1975-04-10 1978-05-02 Nissan Motor Company, Limited Carburetor with altitude compensation assembly
US4149376A (en) * 1975-04-21 1979-04-17 Nissan Motor Company, Limited Internal combustion engine equipped with exhaust gas purifying device
US3978175A (en) * 1975-05-12 1976-08-31 General Motors Corporation Engine air-fuel ratio control means
US4209981A (en) * 1975-05-16 1980-07-01 Nissan Motor Company, Limited Method and an apparatus to control the temperature of an engine exhaust gas purifying device
US4233811A (en) * 1975-05-30 1980-11-18 Kenji Masaki Exhaust gas reaction control system
US4114372A (en) * 1975-06-13 1978-09-19 Nissan Motor Company, Limited Internal combustion engine with air-fuel ratio control device
US4075837A (en) * 1975-06-18 1978-02-28 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purifying system for an internal combustion engine
US4010723A (en) * 1975-10-15 1977-03-08 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas cleaning apparatus for an internal combustion engine for a vehicle
US4083338A (en) * 1976-02-04 1978-04-11 Robert Bosch Gmbh Apparatus for controlling the fuel-air mixture of an internal combustion engine
US4128088A (en) * 1976-05-10 1978-12-05 Colt Industries Operating Corp. Apparatus and system for controlling the air-fuel ratio supplied to a combustion carburetor
US4135482A (en) * 1976-05-10 1979-01-23 Colt Industries Operating Corp Apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
US4144855A (en) * 1976-06-09 1979-03-20 Toyota Jidosha Kogyo Kabushiki Kaisha Device for controlling the air-fuel ratio of a mixture
US4132199A (en) * 1976-07-12 1979-01-02 Hitachi, Ltd. Air-fuel ratio control apparatus
US4090477A (en) * 1976-09-03 1978-05-23 Cragar Industries, Inc. Method of improving operation of internal combustion engines
US4350129A (en) * 1976-10-01 1982-09-21 Nissan Motor Company, Limited Spark-ignition internal combustion engine capable of preventing noxious gas emissions
US4173956A (en) * 1976-11-30 1979-11-13 Nissan Motor Company, Limited Closed loop fuel control in accordance with sensed engine operational condition
US4181108A (en) * 1977-02-07 1980-01-01 Edoardo Weber - Fabbrica Italiana Carburatori S.p.A. System for the control of the composition of the fuel-air mixture of an internal combustion engine
US4279231A (en) * 1977-02-11 1981-07-21 Acf Industries, Incorporated Apparatus for controlling the air-fuel ratio in an internal combustion engine
US4105726A (en) * 1977-02-11 1978-08-08 Acf Industries, Inc. Solenoid apparatus
US4100234A (en) * 1977-02-11 1978-07-11 Acf Industries, Inc. Air metering apparatus
FR2380432A1 (fr) * 1977-02-14 1978-09-08 Colt Ind Operating Corp Dispositif et montage electrique pour regler la richesse du melange alimentant un moteur a explosion
FR2384955A2 (fr) * 1977-02-14 1978-10-20 Colt Ind Operating Corp Dispositif et montage electrique pour regler la richesse du melange alimentant un moteur a explosion
US4197822A (en) * 1977-02-14 1980-04-15 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4150641A (en) * 1977-02-28 1979-04-24 Toyota Jidosha Kogyo Kabushiki Kaisha Arrangement for controlling an air-fuel ratio of an air-fuel mixture of an internal combustion engine
US4169439A (en) * 1977-03-21 1979-10-02 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
DE2819809A1 (de) * 1977-05-06 1978-11-16 Sibe Vorrichtung zur kraftstoffversorgung einer brennkraftmaschine
US4279230A (en) * 1977-05-06 1981-07-21 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Fuel control systems for internal combustion engines
US4208358A (en) * 1977-05-27 1980-06-17 General Motors Corporation Carburetor and method of calibration
US4150645A (en) * 1977-08-19 1979-04-24 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4153652A (en) * 1977-09-30 1979-05-08 Toyota Jidosha Kogyo Kabushiki Kaisha Altitude compensating system of a carburetor mounted on a vehicle
US4148848A (en) * 1977-10-21 1979-04-10 Toyota Jidosha Kogyo Kabushiki Kaisha Air bleed type carburetor
US4178332A (en) * 1978-01-11 1979-12-11 General Motors Corporation Carburetor and method of calibration
US4187814A (en) * 1978-02-16 1980-02-12 Acf Industries, Incorporated Altitude compensation apparatus
US4175103A (en) * 1978-04-17 1979-11-20 General Motors Corporation Carburetor
USRE30622E (en) * 1978-04-17 1981-05-26 Teledyne Industries, Inc. Fuel metering apparatus for a carburetor
US4217314A (en) * 1978-06-26 1980-08-12 General Motors Corporation Carburetor and method of operation
US4251472A (en) * 1978-07-19 1981-02-17 Pierburg Gmbh & Co. Kg Carburetor for combustion engines
US4229387A (en) * 1978-12-26 1980-10-21 Ford Motor Company Carburetor fuel flow control valve assembly
US4223651A (en) * 1979-02-06 1980-09-23 Colt Industries Operating Corp Solenoid vacuum control valve means and apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
US4245603A (en) * 1979-04-30 1981-01-20 General Motors Corporation Adaptive vehicle engine closed loop air and fuel mixture controller
US4256293A (en) * 1979-05-29 1981-03-17 Tom Mcguane Industries, Inc. Throttle control dash pot
EP0023632A1 (en) * 1979-07-20 1981-02-11 Hitachi, Ltd. Method for controlling the amount of fuel supply for an engine
US4366793A (en) * 1980-10-24 1983-01-04 Coles Donald K Internal combustion engine
US4472321A (en) * 1981-11-06 1984-09-18 Toyota Jidosha Kabushiki Kaisha Altitude compensation apparatus for carburetor
US4457279A (en) * 1982-02-16 1984-07-03 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device of a variable venturi-type carburetor
US4563990A (en) * 1982-11-24 1986-01-14 Honda Giken Kogyo Kabushiki Kaisha Fuel supply control system for engine carburetors
US4461732A (en) * 1983-01-21 1984-07-24 General Motors Corporation Engine air induction system
US5258143A (en) * 1992-07-10 1993-11-02 Wang Ming Ching Carburetor with a cam-controlled venturi
EP1101927A4 (en) * 1998-08-05 2007-05-02 Honda Motor Co Ltd DEVICE FOR CONTROLLING THE AIR / FUEL INLET MIXTURE OF AN OUTBOARD ENGINE
US6394426B1 (en) * 2000-07-07 2002-05-28 Walbro Corporation Engine dual fuel supply apparatus
US6615792B1 (en) * 2002-05-06 2003-09-09 Walbro Engine Management Llc Carburetor fuel shut-off system
US20040011341A1 (en) * 2002-07-18 2004-01-22 Seiji Asano Engine air-fuel ration control method with venturi type fuel supply device and fuel control appliance including the method
US6910460B2 (en) * 2002-07-18 2005-06-28 Hitachi, Ltd. Engine air-fuel ration control method with venturi type fuel supply device and fuel control appliance including the method
US20040195705A1 (en) * 2003-04-03 2004-10-07 Burns Michael P. Carburetor
US20050146061A1 (en) * 2003-04-03 2005-07-07 Burns Michael P. Carburetor and method of manufacturing
US7287742B2 (en) 2003-04-03 2007-10-30 Walbro Engine Management, L.L.C. Carburetor and method of manufacturing
US11391381B2 (en) 2017-12-08 2022-07-19 Samson Aktiengesellschaft Control valve assembly and method for operating a control valve assembly

Also Published As

Publication number Publication date
ES421347A1 (es) 1976-06-16
FR2226565A1 (enrdf_load_stackoverflow) 1974-11-15
FR2226565B1 (enrdf_load_stackoverflow) 1979-01-26
JPS50239A (enrdf_load_stackoverflow) 1975-01-06
CA1009527A (en) 1977-05-03
IT997640B (it) 1975-12-30
BR7403255D0 (pt) 1975-01-07
JPS53124936U (enrdf_load_stackoverflow) 1978-10-04
GB1466947A (en) 1977-03-09
MX3262E (es) 1980-08-12
DE2411874A1 (de) 1974-10-31

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