FR2464846A1 - Fuel supply control for carburettor - has constant head supply tank with surplus returned to main tank - Google Patents

Fuel supply control for carburettor - has constant head supply tank with surplus returned to main tank Download PDF

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Publication number
FR2464846A1
FR2464846A1 FR8019785A FR8019785A FR2464846A1 FR 2464846 A1 FR2464846 A1 FR 2464846A1 FR 8019785 A FR8019785 A FR 8019785A FR 8019785 A FR8019785 A FR 8019785A FR 2464846 A1 FR2464846 A1 FR 2464846A1
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France
Prior art keywords
tank
fuel
line
carburettor
cylinder
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FR8019785A
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French (fr)
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Publication of FR2464846A1 publication Critical patent/FR2464846A1/en
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Classifications

    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The fuel flow control for a carburettor has a constant head device (1) in the fuel line (2) between the tank and the carburettor (7) and a return flow line (4) for excess fuel. The device ensures an adequate fuel supply in all states of demand. The fuel is introduced into the constant head at the bottom (1) with the line to the carburettor float chamber (7) set a little higher. The overflow duct (4) is set highest of all to ensure a constant pressure head to the float chamber. The top of the device has a venting line (6) and a protective filter (5) and valve.

Description

Conduite de retour de carburant entre carburateur et réservoir pour voitures à moteur à essence et à réservoir à carburant loaé à l'arrière. Fuel return line between carburetor and tank for cars with petrol engine and with loaé fuel tank at the rear.

Toutes les tentatives faites pour abaisser la consommation de moteurs de voitures qui sont alimentes en carburant au moyen d'une pompe de circulation à partir du réservoir logé à l'ar rière, par des manipulations sur les carburateurs de ces moteurs, ont éte rem.i.ses en question par le problèrne suivant. All attempts made to lower the consumption of car engines which are supplied with fuel by means of a circulation pump from the tank housed at the rear, by manipulations on the carburetors of these engines, have been rem. i.ses in question by the following problem.

Le débit de la pompe est proportionnel à la vitesse de rotation du vilebrequin. Mais pour une même vitesse de rotation, les besoins sont très variables (par exemple entre le régime en cdte ou i1. I'accélération et le régime en descente et au freinage). The pump flow is proportional to the speed of rotation of the crankshaft. However, for the same speed of rotation, the requirements are very variable (for example between the speed in cdte or i1. Acceleration and the speed in descent and in braking).

Théoriquement,.le flotteur et son pointeau as3urent une arrivée de carburant qui correspond aux besoins. Mais étant donné que les conditions d'entraînement de la pompe doivent etre fixées de telle sorte qu'elle refoule suffisamment de carburant pour le maximum possible de demande, le flotteur et son pointeau ne peuvent pas s'opposer aux effets de la surpression de la pompe de circulation au moment où les besoins diminuent. Theoretically, the float and its needle provide a fuel supply that meets the needs. But since the driving conditions of the pump must be fixed so that it delivers enough fuel for the maximum possible demand, the float and its needle cannot be opposed to the effects of the overpressure of the circulation pump when needs decrease.

C'est pour corriger cela qu' t conçue l'invention, dont un exemple d'application est décrit ci-après. It is to correct this that the invention was conceived, an example of application of which is described below.

A proxiriité du carburateur, opportunément en avant de la cuve à niveau constant dans la direction avant-arrière du véhicule, est disposée une cuve supplémentaire sous forme, dans le présent exemple d'application, d'un cylindre 1 dressé verticalement, comportant un fond fixe et un couvercle amovible 5 (fig. 1). Near the carburetor, conveniently in front of the constant level tank in the front-rear direction of the vehicle, is an additional tank in the form, in the present application example, of a cylinder 1 standing vertically, having a bottom fixed and a removable cover 5 (fig. 1).

Dans cette cuve aboutissent, à proximité du fond la conduite 2 issue de la pompe de circulation, un peu plus haut qu'elle la conduite 3 vers la cuve à niveau constant 7 et, encore plus haut, une conduite 4 de plus grand diamètre que les précédentes qui retourne ;". travers la carrosserie vers le côté supérieur du réservoir à carburant situé à l'arrière du véhicule. In this tank end, near the bottom, the pipe 2 coming from the circulation pump, a little higher than it the pipe 3 towards the tank at constant level 7 and, even higher, a pipe 4 of larger diameter than the previous one which returns; ". through the bodywork to the upper side of the fuel tank located at the rear of the vehicle.

les différences de niveau entre les trois conduites qui se terminent dans la paroi du cylindre sont déterminées expérimen taleront, en pafticulier entre la conduite 3 vers la cuve à niveau constant 7 et la conduite de retour 4 vers le réservoir. the level differences between the three pipes which terminate in the wall of the cylinder are determined experimentally, in particular between line 3 towards the constant level tank 7 and the return line 4 towards the tank.

Le niveau du carburant est llaintenu constamment à quelques milli urètres au-dessus du bord inférieur de l'orifice de la conduite de retour 4. 11 doit être suffisamment haut pour qu'en cas de forte conso':imation, il s'établisse un afflux complémentaire suffisant entre le cylindre 1 et la cuve à niveau constant 7 et pour que cas de faible consommation, il ne se produise pas de pression de chute capable de vaincre la contre-pression du flotteur.The fuel level is constantly maintained a few millimeters above the lower edge of the return line orifice 4. It must be high enough so that in the event of high consumption it will establish a sufficient additional inflow between the cylinder 1 and the tank at constant level 7 and so that in the event of low consumption, there is no drop pressure capable of overcoming the back pressure of the float.

Deux phénomènes concomitants indésirables sont à éliminer avec le dispositif décrit. Two concomitant undesirable phenomena are to be eliminated with the device described.

1) I1 faut absolument prévoir un orifice d'aération dans le couvercle 5 du cylindre 1. En l'absence de celui-ci, il peut arriver dans certaines conditions que la totalité du carburant pompé dans le cylindre soit aspirée par la conduite de retour 4 et que la cuve à niveau constant 7 ne reçoive rien.1) It is absolutely necessary to provide a ventilation opening in the cover 5 of the cylinder 1. In the absence of this, it may happen under certain conditions that all of the fuel pumped into the cylinder is sucked through the return line. 4 and that the constant level tank 7 receives nothing.

2) Lorsque le réservoir est bien rempli, son-contenu est proue té vers l'avant ou vers l'arrière, en cas de freinage brutal ou d'accélération brusque, avec suffisamment d'intensité pour qu'il s'y établisse une forte pression contre la paroi supérieure du réservoir, ctest-a-dire contre l'entrée de la conduite de retour 4. L'action de celle-ci est inversée et l'afflux qui se produit alors des deux côtés tait que le carburant réchappe travers l'orifice d'aération prévu dans le couvercle 5 du cylindre et jaillit à l'intérieur de la voiture.2) When the tank is full, its contents are bowed forward or backward, in the event of sudden braking or sudden acceleration, with sufficient intensity for it to establish a strong pressure against the upper wall of the tank, that is to say against the entry of the return line 4. The action of the latter is reversed and the influx which then occurs on both sides is that the fuel escapes through the ventilation hole provided in the cover 5 of the cylinder and springs inside the car.

On parvient à éliminer ces phénomènes en disposant, aussi bien au-dessous de l'orifice d'aération 6 prévu dans le couvercle 5 du cylindre qutau-dessolls de l'orifice d'entrée de la conduite de retour 4 dans la paroi supérieure du réservoir, des clapets qui permettent un écoulement dirigé de haut en bas, mais interdisent uu écoulement de bas en haut. We manage to eliminate these phenomena by having, both below the ventilation opening 6 provided in the cover 5 of the cylinder qutau-dessolls of the inlet opening of the return pipe 4 in the upper wall of the tank, valves which allow a directed flow from top to bottom, but prohibit uu flow from bottom to top.

A titre d'exellple de réalisation, la fig. 2 présente une vue de dessous du clapet 8 - 14, la fig. 3 une vue latérale et la fig. 4 une vue en coupe correspondant à cette vue latérale, la plaquette flottante 13 de métal léger, représentée sur la fig. 5, ayant été omise sur toutes ces figures. As an exemplary embodiment, FIG. 2 shows a bottom view of the valve 8 - 14, FIG. 3 a side view and FIG. 4 a sectional view corresponding to this side view, the floating plate 13 of light metal, shown in FIG. 5, having been omitted from all these figures.

Chacun des deux clapets se compose d'une plaque circulaire 8 qui est fixée au centre d'une plaque 9 de plus grand diamètre, située au-dessus d'elle. Cette dernière sert à la fixation audessous de la paroi supérieure du réservoir ou au-dessous du couvercle 5 du cylindre 1. Sur la plaque de clapet 8 est fixée vers le bas une courte pièce tubulaire 10 de même diamètre. La plaque de fixation 9 comporte au centre un trou qui correspond au diamètre intérieur de la conduite qui y aboutit respectivement. Le trou de la plaque de clapet 8 a un diamètre augnenté de l'épaisseur d'une bague torique 11 qui doit y être placée et il est légèrement cannelé. Each of the two valves consists of a circular plate 8 which is fixed to the center of a plate 9 of larger diameter, located above it. The latter is used for fixing below the upper wall of the tank or below the cover 5 of the cylinder 1. On the valve plate 8 is fixed down a short tubular piece 10 of the same diameter. The fixing plate 9 has in the center a hole which corresponds to the internal diameter of the pipe which terminates therein respectively. The hole in the valve plate 8 has a diameter increased by the thickness of an O-ring 11 which must be placed there and it is slightly grooved.

A la distance nécessaire de l'extrémfté inférieure de la pièce tubulaire 10, une gorge est creusée pour un anneau de retenue ou une bagle d'arrêt 12 en fil d'acier à ressort. At the necessary distance from the lower end of the tubular part 10, a groove is hollowed out for a retaining ring or a retaining ring 12 made of spring steel wire.

Entre ce dernier et le plan de la bague torique se déplace une plaquette circulaire 13, relativement légère, munie de quatre ergots 14 qui la maintiennent à distance, vers le haut et vers le bas suivant le sens d'écoulement du fluide contrôlé' par le clapet. Between the latter and the plane of the O-ring moves a circular plate 13, relatively light, provided with four lugs 14 which keep it at a distance, upwards and downwards according to the direction of flow of the fluid controlled by the valve.

Claims (5)

R2VSNDICATIONSR2VSNDICATIONS 1. Dispositif pour voitures à moteur à essence et à réservoir de carburant logé à l'arrière, caractérisé en ce que la conduite de carburant (2 + 3) entre la pompe de circulation et la cuve à niveau constant est interrompue de telle sorte que le carburant dont le carburateur n' a pas besoin soit retenu et ramené dans le réservoir par une conduite supplémentaire (4).1. Device for cars with petrol engine and fuel tank housed at the rear, characterized in that the fuel line (2 + 3) between the circulation pump and the constant level tank is interrupted so that the fuel which the carburetor does not need is retained and brought back into the tank by an additional line (4). 2. Dispositif selon la revendication 1, caractérisé en ce qu'il est disposé, dans l'interruption de la conduite de carburant, une cuve - sous forme d' Un cylindre dressé verticalernent (1), comportant un fond fixe et ull couvercle amovible (5) dans l'exemple d'application - à travers laquelle passe le carburant.2. Device according to claim 1, characterized in that it is arranged, in the interruption of the fuel line, a tank - in the form of a vertically upright cylinder (1), comprising a fixed bottom and a removable cover (5) in the application example - through which the fuel passes. 3. Dispositif selon la revendication 2, caractérisé en ce qu'une conduite (4) sort de la paroi latérale du cylindre (1) à une hauteur déterminée avec précision au-dessus du passage de carl)urant, conduite par laquelle le carburant non nécessaire retourne dans le réservoir.3. Device according to claim 2, characterized in that a line (4) leaves the side wall of the cylinder (1) at a height determined precisely above the passage of carl) urant, line through which the fuel not necessary returns to the tank. 4. Dispositif selon la revendication 2, caractérisé en ce qu'un orifice d'aération (6) est pratiqué dans le couvercle (5) du cylindre.4. Device according to claim 2, characterized in that a ventilation opening (6) is formed in the cover (5) of the cylinder. 5. Dispositif selon la revendication 3 ou 4, caractérisé en ce lu' au-dessous de l'orifice d'entrée de la conduite de retour (4) dans le réservoir et au-dessous de l'orifice d'aération (6) dans le couvercle (5) du cylindre (1), il est disposé des clapets respectifs (8 - 14) qui permettent un écoulement vers'le bas et s'opposent à un écoulement en sens opposé. 5. Device according to claim 3 or 4, characterized in that lu 'below the inlet port of the return pipe (4) in the tank and below the ventilation port (6) in the cover (5) of the cylinder (1), there are disposed respective valves (8 - 14) which allow a downward flow and oppose a flow in the opposite direction.
FR8019785A 1979-09-12 1980-09-12 Fuel supply control for carburettor - has constant head supply tank with surplus returned to main tank Withdrawn FR2464846A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792936744 DE2936744A1 (en) 1979-09-12 1979-09-12 FOR CARS WITH OTTO ENGINE AND REAR FUEL TANK A FUEL RETURN PIPE FROM THE CARBURETOR TO THE TANK

Publications (1)

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FR2464846A1 true FR2464846A1 (en) 1981-03-20

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FR8019785A Withdrawn FR2464846A1 (en) 1979-09-12 1980-09-12 Fuel supply control for carburettor - has constant head supply tank with surplus returned to main tank

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JP (1) JPS56104148A (en)
DE (1) DE2936744A1 (en)
FR (1) FR2464846A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676253A1 (en) * 1991-05-07 1992-11-13 Ouadah Amar Fuel economizer for motor vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1020669A (en) * 1964-02-28 1966-02-23 Cav Ltd Venting device for use with a liquid container
US3354979A (en) * 1965-01-25 1967-11-28 Walker Brooks Fuel feeding system for vehicles
DE2460101A1 (en) * 1974-12-19 1976-06-24 Volkswagenwerk Ag Vehicle constant supply fuel tank - has two pumps and subsidiary chamber to ensure sufficient fuel while cornering

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE143322C (en) *
DE2540548A1 (en) * 1974-09-17 1976-03-25 Rene Jean Jacques Villemur IC engine fuel supply system - valve unit is interposed between fuel pump and carburettor
US4044746A (en) * 1974-12-24 1977-08-30 Marie Kaye Fuel control device
FR2303167A1 (en) * 1975-03-04 1976-10-01 Lebrun Henri Fuel economiser for internal combustion engine - maintains constant head of fuel supplied to carburettor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1020669A (en) * 1964-02-28 1966-02-23 Cav Ltd Venting device for use with a liquid container
US3354979A (en) * 1965-01-25 1967-11-28 Walker Brooks Fuel feeding system for vehicles
DE2460101A1 (en) * 1974-12-19 1976-06-24 Volkswagenwerk Ag Vehicle constant supply fuel tank - has two pumps and subsidiary chamber to ensure sufficient fuel while cornering

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676253A1 (en) * 1991-05-07 1992-11-13 Ouadah Amar Fuel economizer for motor vehicle

Also Published As

Publication number Publication date
JPS56104148A (en) 1981-08-19
DE2936744A1 (en) 1981-04-02

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