US3351327A - Variable air-intake carburettor - Google Patents

Variable air-intake carburettor Download PDF

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Publication number
US3351327A
US3351327A US372235A US37223564A US3351327A US 3351327 A US3351327 A US 3351327A US 372235 A US372235 A US 372235A US 37223564 A US37223564 A US 37223564A US 3351327 A US3351327 A US 3351327A
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Prior art keywords
duct
chamber
fuel
air
pressure
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US372235A
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English (en)
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Simonet Jocelyn Elie Louis
Biver Jean
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Societe du Carburateur Zenith SA
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Societe du Carburateur Zenith SA
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    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/04—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling being auxiliary carburetting apparatus able to be put into, and out of, operation, e.g. having automatically-operated disc valves
    • F02M1/046—Auxiliary carburetting apparatus controlled by piston valves
    • 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
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves

Definitions

  • ABSTRACT OF THE DISCLOSURE A variable air-intake carburetor having separate air inlet ducts feeding into the carburation chamber and including pressure responsive control means to vary the effective cross-section of said air inlet ducts, one of said ducts including a fuel inlet orifice fed by fuel inlet means also controlled by said pressure responsive control means.
  • This invention relates to a variable air-intake carburettor for internal combustion engines.
  • the flow cross-section for the air is chosen so as to be sufficiently large to ensure a proper supply to the engine at high power levels, the atomisation is poor at low power levels because the velocity of the air at the spraying point is too low and the power developed by the engine reduced owing to bad combustion. If, on the other hand, this cross-section is chosen so as to be sufiiciently small to ensure good atomisation at low power levels, at high power levels the air undergoes a loss of pressure which results in a reduction of the feeding rate of the engine and, consequently, a reduction in the maximum power.
  • the cross-section chosen is a compromise between a value which would result in loss of engine power at low power levels and one which would result in reduction of the maximum power.
  • variable air-intake carburettors comprising, for varying the flow cross-section for the air, a plug fast with a piston or with a diaphragm which is subjected to the vacuum prevailing in the vicinity of the spraying point and which is displaced at right angles to the direction of flow of the air.
  • a profiled needle con' nection to the plug adjusts the fuel-flow orifice which is located at the spraying point.
  • the plug rubs in its seat and consequently its movements are insufficiently precise.
  • it can only move vertically and not horizontally, so that it cannot be applied to a carburetor with a vertical air duct.
  • it is difiicult to centre the metering needle correctly in its seat, so that the rate of the fuel-flow is not sufficiently accurate.
  • the carburettor according to the invention does not exhibit the aforesaid drawbacks. It is characterized in that a pressure-sensitive device which is actuable by the vacuum prevailing in the carburation chamber simultaneously controls a movable upstream air shutter, which controls a main air duct of the said carburation chamber, and a device which varies the useful cross-section of a metering duct for fuel supplied to a secondary air duct of the said carburation chamber.
  • FIGURE 1 is a plan view of the carburettor according to the invention with the top cover removed;
  • FIGURE 2 is a rear view of the carburettor, partially in section on the line II-II of FIGURE 1;
  • FIGURE 3 is a vertical section on the line IIIIII of FIGURE 1;
  • FIGURE 4 is a vertical section on the line IVIV of FIGURE 1;
  • FIGURE 5 is a partial vertical section on the line V-V of FIGURE 4.
  • FIGURE 6 is a developed section showing the connection between the carburation chamber and the variablepressure chamber
  • FIGURE 7 is a developed section showing the arrange- .ment of the auxiliary starter carburettor
  • FIGURE 8 shows a modified constructional form of the strangulation device shown in FIGURE 6.
  • FIGURES 1, 3 and 6 are identical to the drawings. Referring to the drawings, in FIGURES 1, 3 and 6,
  • the reference 19 designates an air duct which will be referred to hereinafter as the main air duct and the references 23 and 21 designate, respectively, an upstream shutter and a downstream shutter which are disposed in the main duct 19 and are both capable of closing it to a greater or lesser degree according to their positions.
  • the shutter 21, the pivot spindle of which is designated by the reference 80, may be controlled by, for example,
  • the accelerator of a motor vehicle In this case it is generally referred to as a butterfly valve.
  • the space 20 between the two shutters 23 and 21 will be referred to hereinafter as the carburation chamber.
  • the secondary duct 22 Into the carburation chamber 20 there opens an air duct 22, the mean cross-section of which is considerably smaller than that of the main duct 19 and may be, for instance, equal to A of the cross-section of the latter being for this reason referred to hereinafter as the secondary duct.
  • the secondary duct 22 In the secondary duct 22 there is disposed a fuel outlet orifice 35 to which fuel will be fed in a manner to be described hereinafter.
  • the secondary duct 22 is constituted by an upstream portion 22a parallel to the main duct 19 and a by a downstream portion 22b inclined with respect to the main duct 19, and the upstream end of the downstream portion 22b of the secondary duct 22 is formed by a frontal surface 11, the plane of which is inclined with respect to the main duct 19.
  • the upstream shutter 23 can pivot about a spindle 24 so as to close the main duct 19 to a greater or lesser degree.
  • the reference 33 designates a chamber adapted to contain fuel and enclosing the known conventional elements which enable a constant fuel pres-' sure to be made to obtain therein.
  • the chamber will be constructed as a constant level chamber.
  • the constant level is shown in FIGURE 4 at 12.
  • the chamber 33 is closed by a first cover 16 which is fixed to the chamber 33 by screws 14 (FIGURE 1) and which carries a tube 15 supplying the chamber 33 with fuel.
  • An opening 18 is formed in the first cover 16. This opening is normally closed by a second cover 53.
  • the needle to which reference will be made hereinafter and the lever which serves to displace it can be mounted one upon the other.
  • An inner part 64 is fixed to the first cover 16 by means of screws 17.
  • the part 64 comprises a vertical'portion 64a enclosing a casing 57 in which there can slide the upper cylindrical portion 27b of a needle 27, the lower portion 27a of which is-profiled.
  • An annular space 30 is formed "between the vertical portion 64a of the inner part 64' and the casing 57 and the latter has ports 31 level with the annular space 30. Fuel contained in the chamber 33 reaches the ports 31 through the annular space '30.
  • the casing 57 has a calibrated orifice 25 into which the profiled portion 27a of the needle 27 can penetrate to a greater or lesser depth and which is therefore closed by the needle to a greater or lesser extent according to the position of the latter, so that the calibrated orifice 25 constitutes a metering duct for the fuel and the needle 27 constitutes a device for varying the useful cross-section of the metering duct 25.
  • the needle 27 is shown in FIGURE 4 in its highest position, in which it almost completely closes the orifice 25, this position corresponding to slow running of the engine, as will be explained hereinafter.
  • a channel 32 is formed partly in the inner part 64 and partly in the first cover 16.
  • the channel 32 starts from the calibrated orifice 25 and the fuel which has passed through that part of the orifice 25 which has been left free by the needle 27 flows through it.
  • the channel 32 constitutes a fuel duct conveying the fuel from the metering duct 25 to'the fuel-outlet orifice 35. At the orifice 35 an emulsion of fuel and air is formed.
  • the reference 36 designates apparatus comprising a pressure-sensitive device.
  • This apparatus is composed of the following elements: a base 37 having an orifice 38, a cap 39 mounted on the base 37, a diaphragm 40 inserted between the base 37 and the cap 39 and dividing the apparatus 36 into two chambers 41 and 42, the second chamber 42 of which communicates with the atmospheric air by means of the orifice 38, and a spring 43 which urges the diaphragm 40 towards the base 37.
  • the chamber 41 communicates with the carburation chamber 20 through the conduit 44, so that the position of the pressure-sensitive device formed by the diaphragm 40 depends on the pressure obtaining in the carburation chamber 20.
  • FIGURE 2 there will be seen a system for transmitting movement between the pressure-sensitive device 40 and the upstream shutter 23.
  • the diaphragm 40 carries a rod 45 which is articulated by means of a pin 46 to a lever 47 fast with the pivot spindle 24 of the upstream shutter 23.
  • FIGURE 4 shows a portion of the movement transmission system between the pressure-sensitive diaphragm 40 and the needle 27.
  • This transmission of movement is effected through the medium of the spindle 24 of the upstream shutter 23, so that the system for the transmission of movement between the pressure-sensitive diaphragm 40 and the needle 27 comprises the system described above for the transmission of movement between the diaphragm 40 and the upstream shutter 23'.
  • the reference 48 designates a lever which is split at one of its ends and which, by means of a screw 49, grips the spindle 24.
  • the lever is formed at its other end by a yoke, the two arms of which are joined by a pin 50.
  • the elements of the carburettor to which reference has been made in the foregoing are in the positions shown in FIGURES 1, 2, 3 and 4, that is to say the shutter 23 engine can be assumed to be effected wholly through the secondary duct 22 and the under-pressure or vacuum created in this duct by the velocity of the air causes fuel which has passed through the annular space between the needle 27 and the orifice 25 to gush into the orifice 35.
  • the cross-section of the duct 22 can be chosen to be sufiiciently small for the velocity of the air in the secondary duct 22 to maintain a considerable value, thus ensuring effective atomisation of the fuel at 35.
  • the upstream shutter 23 When the engine is working at full power, the upstream shutter 23 is fully or almost fully open and the total crosssection of the main duct 19 and of the secondary duct 22 can be chosen to be sufficiently large for the induction loss due to the checking of the air as it passes through the carburettor to be very small.
  • the carburettor according to the invention may include a closing device which enables the secondary duct 22 to be closed upstream of the fuel outlet orifice 35.
  • FIGURES 3 and 6 This arrangement is illustrated in FIGURES 3 and 6, in which the closing device has a surface 66 adapted to be applied against the frontal surface 11 of the upstream end of the downstream portion 22b of the secondary duct 22 while the closing device is a slide valve 52 having a return spring 54 and formed by a movable wall of a chamber 55 which communicates with the carburation chamber 20 through a tube 56.
  • the movement of the slide valve 52 can be controlled by a physical quantity which is dependent upon the rate of turning-over of the engine, in" such manner that the secondary duct 22 isclosed when the engine is at rest or is being driven at low speed, by the starter for example, and is partially or fully opened when the engine is turning at its normal slow running speed or at a higher speed.
  • a branch passage 51 capable of communicating with the atmospheric air
  • an adjustable closing device 58 which is constituted in FIGURE 5 by a needlepointed screw and which enables this branch 51 to be closed to a greater or lesser extent.
  • This arrangement enables the fuel flow of carburettors which are mass-produced and which may differ slightly from one another to be adjusted once for all.
  • An air duct 60 (FIGURE 3) can connect the carburation chamber 20 to that portion of the main duct 19 which is located upstream of the upstream shutter 23 and to an adjustable closing device 61 which, in the construction shown in FIGURE 3, is constituted by a needlepointed screw and which enables this air duct 60 to be closed to a greater or lesser extent.
  • This device enables the richness of the mixture delivered at slow running speed to be adjusted.
  • the conduit 44 (FIGURE 6) connecting the variablepressure chamber 41 to the carburation chamber 20 may comprise a calibrated constriction 26.
  • a means of ensuring that the metering is nevertheless correct consists in delaying the opening of the upstream shutter 23, which is controlled by the vacuum appearing in the carburation chamber 20 at the instant of the sudden opening of the downstream shutter 21.
  • the calibrated constriction 26 provides this delay.
  • This constriction operates in the two possible senses of the variation of the vacuum in the carburation chamber 20.
  • the delay produced in closing the upstream shutter 23 when the downstream shutter 21 is reclosed rapidly causes an abnormal increase in the pressure in the carburation chamber 20, which may result in the stopping of the flow of fuel through the outlet orifice 35 and, consequently, the stalling of the engine.
  • the conduit 44 may comprise, in place of a constriction 26 acting in both senses, a strangulation device which acts only when the pressure in the variable-pressure chamber decreases, that is to say when the upstream shutter 23 opens.
  • This strangulation device may be constituted (see FIG- URE 8) by a calibrated constriction element 70 inserted in the conduit 44 and by a branch duct 71 arranged in parallel with this calibrated constriction element 70 and containing a movable element 72 which closes the branch 71 only when the pressure in the variable-pressure chamber 41 decreases.
  • the strangulation device may be constituted (see FIGURE 6) by a valve 28 inserted in the conduit 44, having a calibrated constriction 26, which valve occupies, when the pressure in the variable-pressure chamber 41 decreases, a closed position (the position illustrated) in which air is allowed to pass only through the calibrated constriction 26, but which, when the said pressure increases, occupies a position (the upper position, not shown) in which it allows air to pass through a passage 34 alternative to the calibrated constriction 26.
  • FIGURE 7 shows an auxiliary starter carburetor comprising in the usual manner the following elements: an air duct 65 opening into the main duct 19 downstream of the downstream shutter 21; a device 62 for forming a metered emulsion of fuel in air; a duct 63 conveying the emulsion into the air duct 65; a closing device 59 controlling both the air duct 65 and the duct 63 conveying the emulsion; and a lever 67 controlling the closing device 59.
  • Lever 67 is manually opened during cranking.
  • the reference 68 designates the orifice through which the fuel in the chamber 33 passes into the auxiliary carburetor and the reference 65a designates an orifice through which air is supplied to the auxiliary carburetor.
  • the special feature which is illustrated in FIGURE 7 is that the air duct 65 is controlled by the same closing device 52 which enables the secondary duct 22 to be closed.
  • This arrangement makes it possible to cause an increased vacuum to obtain in the air duct in order to enrich the mixture upon starting the engine.
  • the carburetor may also comprise a device by means of which the termination of the opening of the downstream shutter 21 will control the commencement of the opening of the upstream shutter 23.
  • FIGURE 2 This device is illustrated in FIGURE 2.
  • the spindle of the downstream shutter 21 carries a lever 81 on which pivots one of the ends of a connecting rod 82.
  • the other end of the connecting rod 82 is articulated to a lever 83 mounted loosely on the spindle 24 of the upstream shutter 23.
  • the lever 47 carries a bent lug 47a.
  • the vacuum in the carburetion chamber 20 does not reach a value sufficient to cause the flow of fuel through the orifice 35 when the engine is driven by its starter. In this way, air free from fuel is introduced into the engine.
  • the reference 14 designates fixing screws, the reference 69 a plug which closes the chamber 55 in air-tight fashion and the references 73 and 74 fitting plugs.
  • a variable air intake carburetor for internal combustion engines comprising a carburetion chamber, main and secondary air ducts communicating with said carburetion chamber, a movable air control member in said main duct upstream of said carburetion chamber, a fuel inlet orifice in said secondary air duct, a metering duct for the controlled supply of fuel to said secondary air duct through said orifice, a device operable to vary the available cross-section of said metering duct, to control the supply of fuel, pressure-sensitive means responsive to pressure variation in said carburetion chamber, to control operation of said air control member and said fuel control device, and an obturating device to open and close said secondary duct upstream of said fuel inlet orifice, in response to pressure variation in said carburetion chamber.
  • said obturating device comprises a spring-biased slide-valve piston which is exposed to the pressure in said carburation chamber so as to be movable in response to pressurevariations therein.
  • said pressure-sensitive means includes a variable volume chamber having a movable wall, a pressure conduit connecting said variable-volume chamber with said carburation chamber, whereby said wall is movable in response to pressure-variation in said carburation chamber and means mechanically connecting said movable wall with said air control member to operate the latter.
  • a carburetor according to claim 1, wherein said obturating device is operable to open said secondary duct upstream of said fuel inlet orifice in response to pressure reduction in said carburetion chamber.
  • variable air int'ake carburetor for internal combustion engines and an' auxiliary starting carburctor
  • said variable air intake carburetor comprising a carburetion chamber, main and secondary air duct communicating' with said carburetion chamber, a movable air control member in said main duct upstream of said'carburation chamber, a fuel inlet orifi'c'e in said secondary air duct, a metering duct for' the controlled supply of fuel to said secondary air duct through said orifice, a device operable to vary the available cross-section of said metering duct, to control the supply of fuel, pressure-sensitive means responsive to pressure variation in.
  • said carbura'tion chamber to control operation of said air control member and said fuel control device, a flow duct' downstream of said carburetion chamber and a flow control member in said downstream flow duct, and said auxiliary star-ting carburetor including an air intake, a fuel intake and an outlet for fuel-air mixture opening into said downstream fio'w duct downstream of said flow control member, an obtur'ating device being provided to open and close said secondary duct upstream of said fuel supply orifice, in response to pressure variation in said carburation chamber, and to control simultaneously the air intake of said auxiliary carburetor.
  • a variable air-intake carburetor for internal combustion engines comprising a carburetion chamber", a main air duct communicating with said carbu'r'etiojn chamber, a movable air control member in said main duct upstream of carburet'ion chamber, a secondary air duct cornmunicating with said carburetion chamber and; comprising an upstream portion which is parallel to said main duct and a downstream portion which is inclined relatively to said main duct, a fuel inlet orifice in saiddownstream portion, said downstream portion having a seating surface upstream thereof, lying in a plane inclined relatively to said rnain duct, an obtur'ating member actuated in response to carburet-ion chamber pressure and cooperating with said seating surface to open and close said secondary duct upstream of said fuel inlet orifice, a metering duct.
  • a device operable to vary the available cross section of said metering duct to control the supply of fuel, and pressuresensitive meansresponsive to pressure variation in said carburetion chamber to control operation of said air control member and said fuel control device.
  • a variable air-intake carburetor for internal combustion engines comprising a carburetion chamber, main and secondary air duct communicating with said carburetion chamber, a movable air control member in said main duct upstream of said carburetion chamber, a fuel inlet orifice in said secondary air duct, a metering duct for the controlled supply of fuel to said secondary air duct through said orifice, a device operable to vary the available' cross section of said metering duct to control the supply offuel, a variable volume chamber having a movable wall, mechanical means for operatively connecting said movable wallwith said air control member and said fuel control device, a pressure conduit connecting said variable-volume chamber with said carburetion chamber, whereby said wall is movable in response to pressure variation in said carburetion chamber, a valve in said pressure conduit closable and openable in response to,- respectively, pressure-decrease and pressure-increase in said variable-volume chamber, said valve having a calibrated opening to allow restricted communication between said variable-volume chamber

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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)
US372235A 1963-06-07 1964-06-03 Variable air-intake carburettor Expired - Lifetime US3351327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR937463A FR1366970A (fr) 1963-06-07 1963-06-07 Carburateur à air variable

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US3351327A true US3351327A (en) 1967-11-07

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US372235A Expired - Lifetime US3351327A (en) 1963-06-07 1964-06-03 Variable air-intake carburettor

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US (1) US3351327A (fr)
DE (1) DE1476261A1 (fr)
FR (1) FR1366970A (fr)
GB (1) GB1061533A (fr)
SE (1) SE304132B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456929A (en) * 1966-08-12 1969-07-22 Zenith Carburetter Co Ltd Carburetters
US3677241A (en) * 1970-05-08 1972-07-18 Laprade Usines Sa Carburettors operating under a constant reduced pressure
US3778041A (en) * 1971-03-08 1973-12-11 C Kincade Variable venturi carburetors
US3935290A (en) * 1974-08-05 1976-01-27 Ford Motor Company Carburetor cold engine fuel enrichment system
US4013741A (en) * 1975-03-31 1977-03-22 Lectron Products, Inc. Carburetor
US4420439A (en) * 1981-02-10 1983-12-13 Bosch & Pierburg System Ohg Constant pressure carburettors
JPS6151466U (fr) * 1979-07-28 1986-04-07

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444673A1 (de) * 1984-12-07 1986-06-19 Pierburg Gmbh & Co Kg, 4040 Neuss Festlufttrichter-vergaser

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761569A (en) * 1924-09-24 1930-06-03 Wheeler Schebler Carburetor Co Carburetor
US1824852A (en) * 1927-05-11 1931-09-29 Detroit Lubricator Co Carburetor
US2082293A (en) * 1935-06-12 1937-06-01 Linga Torbjorn Carburetor
US2084489A (en) * 1933-09-06 1937-06-22 Hess Harry Weir Carburetor
US2365910A (en) * 1930-03-13 1944-12-26 Bendix Prod Corp Carburetor
US2544111A (en) * 1945-10-19 1951-03-06 Schneebeli Hugo Carburetor
US2683028A (en) * 1951-04-26 1954-07-06 Schneebeli Hugo Carburetor
US2969783A (en) * 1958-08-13 1961-01-31 Gen Motors Corp Choke actuating mechanism
US2988345A (en) * 1959-02-26 1961-06-13 Gen Motors Corp Air valve carburetor
US3078079A (en) * 1960-06-29 1963-02-19 Gen Motors Corp Air valve carburetor
US3278173A (en) * 1963-04-29 1966-10-11 Acf Ind Inc Carburetor

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761569A (en) * 1924-09-24 1930-06-03 Wheeler Schebler Carburetor Co Carburetor
US1824852A (en) * 1927-05-11 1931-09-29 Detroit Lubricator Co Carburetor
US2365910A (en) * 1930-03-13 1944-12-26 Bendix Prod Corp Carburetor
US2084489A (en) * 1933-09-06 1937-06-22 Hess Harry Weir Carburetor
US2082293A (en) * 1935-06-12 1937-06-01 Linga Torbjorn Carburetor
US2544111A (en) * 1945-10-19 1951-03-06 Schneebeli Hugo Carburetor
US2683028A (en) * 1951-04-26 1954-07-06 Schneebeli Hugo Carburetor
US2969783A (en) * 1958-08-13 1961-01-31 Gen Motors Corp Choke actuating mechanism
US2988345A (en) * 1959-02-26 1961-06-13 Gen Motors Corp Air valve carburetor
US3078079A (en) * 1960-06-29 1963-02-19 Gen Motors Corp Air valve carburetor
US3278173A (en) * 1963-04-29 1966-10-11 Acf Ind Inc Carburetor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456929A (en) * 1966-08-12 1969-07-22 Zenith Carburetter Co Ltd Carburetters
US3677241A (en) * 1970-05-08 1972-07-18 Laprade Usines Sa Carburettors operating under a constant reduced pressure
US3778041A (en) * 1971-03-08 1973-12-11 C Kincade Variable venturi carburetors
US3935290A (en) * 1974-08-05 1976-01-27 Ford Motor Company Carburetor cold engine fuel enrichment system
US4013741A (en) * 1975-03-31 1977-03-22 Lectron Products, Inc. Carburetor
JPS6151466U (fr) * 1979-07-28 1986-04-07
JPS6245067Y2 (fr) * 1979-07-28 1987-12-01
US4420439A (en) * 1981-02-10 1983-12-13 Bosch & Pierburg System Ohg Constant pressure carburettors

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Publication number Publication date
DE1476261A1 (de) 1969-10-16
FR1366970A (fr) 1964-07-17
SE304132B (fr) 1968-09-16
GB1061533A (en) 1967-03-15

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