EP0277960A1 - Fuel supply system for vehicles and particularly for motor vehicles - Google Patents

Fuel supply system for vehicles and particularly for motor vehicles

Info

Publication number
EP0277960A1
EP0277960A1 EP87904062A EP87904062A EP0277960A1 EP 0277960 A1 EP0277960 A1 EP 0277960A1 EP 87904062 A EP87904062 A EP 87904062A EP 87904062 A EP87904062 A EP 87904062A EP 0277960 A1 EP0277960 A1 EP 0277960A1
Authority
EP
European Patent Office
Prior art keywords
fuel
pump
receptacle
filter
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87904062A
Other languages
German (de)
French (fr)
Inventor
Bernard Bruere
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0277960A1 publication Critical patent/EP0277960A1/en
Withdrawn legal-status Critical Current

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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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/16—Other apparatus for heating fuel
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a fuel supply installation for a vehicle and in particular for a motor vehicle.
  • the present invention aims in particular to remedy these drawbacks and for this purpose relates to a fuel supply installation for vehicles and in particular for motor vehicles, comprising a supply pump sucking the fuel from a tank via a liquid purification fuel filter, this pump delivering the fuel to the injectors by an injection pump provided with a pump return circuit, installation characterized in that the return circuit of the injection pump is connected by its downstream end to the pipe connecting the liquid purification filter and the feed pump.
  • the liquid purification filter comprises a receptacle provided with a cover crossed by corresponding bores, one on arrival, in the receptacle of the filter, unfiltered fuel, the other at the outlet of the filtered fuel to the line connected to the feed pump and to which the return line of the injection pump is connected, the hole for the unfiltered fuel extending into the receptacle by a flared mouth.
  • the hole for unfiltered fuel is extended in the receptacle by a conical part.
  • the receptacle of the filter comprises a bent tubing embedded in the fuel and the cleaning liquid, this tubing extending by its bent part until close to the base of the receptacle, the two ends of this tubing leading to holes in the cover and being connected to a hot water circulation pipe of a vehicle heating circuit.
  • FIG. 1 is the diagram of a supply installation in accordance with the invention
  • Figure 2 is a diagram corresponding to Figure 1, more particularly intended for the fuel supply of a truck.
  • the object of the present invention is therefore to provide an installation for supplying fuel to vehicles, which ensures efficient filtering of the fuel without the risk of entraining the cleaning liquid with the filtered fuel, this which would be the cause of failures and in general, a malfunction of the engine.
  • the installation comprises a fuel tank 1 which is intended to supply the injectors 2 of the vehicle via, a non-return valve 3, a fuel filter with liquid purification 4, d a feed pump 5, a paper fuel filter 6 and an injection pump 7, the outlet pipes of which are connected to the various injectors 2.
  • the liquid purification fuel filter 4 comprises a bell-shaped receptacle 8 made of transparent material, the open upper end of which is closed by a cover 9 provided with holes 10 and 11 intended respectively for supplying the filter with fuel. from the tank and the pump 5 is supplied with filtered fuel.
  • the lower half of the bell 5 has a liquid 12 with a density heavier than that of the gas oil, while the upper part is filled with filtered gas oil 13 evacuated by the hole 11.
  • the hole 10 extends inside from the bell 8 and into the purification liquid 12 by a conical part 14.
  • This conical part 14 is therefore filled with unfiltered gas oil and as the filtered gas oil 13 is evacuated by the pump d 5, unfiltered gas oil from the conical part 14 is evacuated through the periphery of its lower orifice to go up to the line of separation of the two liquids 12 and 13.
  • This conical part 14 makes it possible to obtain, through its large large lower orifice, a greater contact surface between the cleaning liquid and the fuel to be cleaned.
  • the fuel to be filtered overflows from this lower orifice in the form of a lamellar cylinder favoring the filtering of the fuel passing through the liquid 12.
  • the bell 8 comprises a bent tube 15 which is extended by its elbow at 15 1 as close to the base of the bell 8, while the ends of this tube are connected, opposite one of the 'other, to holes 16 and 17 provided in the cover 9. These holes 16 and 17 are connected by water circulation pipes 18 to an installation 19 for heating the vehicle.
  • the injection pump 7 comprises , as is known, a line 20 intended to ensure the return of the fuel.
  • this pipe 20 is connected to the pipe 21, that is to say between the cover 9 and the feed pump 5, so that this feed pump 5 is supplied, from a "T" fitting located at 22, by the excess fuel from the injection pump and by the fuel which has just been filtered by the filter 4. It can thus be seen that the fuel which is sent to the injectors , corresponds very exactly at all times to the one that is filtered by the filter at liquid purification 4, which makes it possible to reduce the necessary flow rate of this filter to obtain a better quality of filtration.
  • the injectors 2 themselves are connected by a return line 23 to the tank 1, in order to bring back into this tank the excess fuel not sprayed by the injectors.
  • FIG. 2 corresponds to that of FIG. 1, except that it implements two liquid purification fuel filters 4 1 and 4 2 , the two heating pipes 15 of which are connected in series to the pipes. 18 of the heating circuit.
  • the two holes 11 are connected together at the same point 24 to a connector with four branches, to which also lead the pipe 20 constituting the return pipe of the injection pump 7 and the pipe 21 connected to the supply pump 5.
  • This arrangement makes it possible to obtain a strictly parallel mounting of the two filters 4 1 , 4 2 in order to avoid any filtering imbalance, which would occur if the pipes 20 and 21 and the holes 11 were connected at different points.
  • the filtered fuel coming from the filters 4 1 and 4 2 corresponds to that sucked by the pump 25 minus the fuel discharged through the line 20 and the resulting suction pressure is divided into two equal parts ensuring the ascent of the filtered fuel contained, in the two bells 8, above the purification liquid 12.
  • the pipe 21 will preferably include a pre-filter 25 with a priming pump.
  • the present description relates more particularly to a fuel supply installation for a diesel vehicle.
  • it can be implemented for petrol vehicles using a filter liquid immiscible with petrol and preferably which is not liable to freeze.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

Installation d'alimentation en carburant pour véhicule et notamment pour véhicules automobiles, comportant une pompe d'alimentation (5) aspirant le carburant d'un réservoir par l'intermédiaire d'un filtre de carburant à épuration liquide (4), cette pompe refoulant le carburant vers les injecteurs (2) par une pompe d'injection (7) pourvue d'un circuit de retour de pompe (20), installation caractérisée en ce que le circuit (20) de retour de la pompe d'injection est branché par son extrémité aval sur la canalisation (21) reliant le filtre à épuration liquide de la pompe d'alimentation (5).Fuel supply installation for vehicles and in particular for motor vehicles, comprising a supply pump (5) sucking fuel from a tank via a liquid purification fuel filter (4), this pump delivering fuel to the injectors (2) by an injection pump (7) provided with a pump return circuit (20), installation characterized in that the return circuit (20) of the injection pump is connected by its downstream end on the pipe (21) connecting the liquid purification filter of the feed pump (5).

Description

"Installation d'alimentation en carburant pour véhicule et notamment pour véhicule automobile". "Installation of fuel supply for vehicle and in particular for motor vehicle".
L'invention concerne une installation d'alimentation en carburant pour véhicule et notamment pour véhicule automobile.The invention relates to a fuel supply installation for a vehicle and in particular for a motor vehicle.
On connaît déjà des installations qui comportent un filtre de carburant à épuration liquide, qui est inséré dans le circuit entre le réservoir de carburant et la pompe d'alimentation, cette pompe alimentant elle-même les injecteurs du véhicule par l'intermédiaire d'une pompe d'injection. Les injecteurs ainsi que la pompe d'injection comportent un circuit de retour qui ramène au réservoir le carburant en excédent amené aux injecteurs par la pompe d'injection ainsi que le carburant en excédent qui n'est pas pulvérisé par l'injecteur. II est apparu que de telles installations d'alimentation en carburant comportant un filtre à carburant à épuration liquide, sont d'un fonctionnement défectueux dans la mesure où il se produit bien souvent un entraînement du liquide de filtrage par le carburant. Ainsi, ces installations connues ne peuvent avoir un fonctionnement correct que pour des débits relativement faibles de carburant.Installations are already known which include a liquid purification fuel filter, which is inserted into the circuit between the fuel tank and the supply pump, this pump itself supplying the injectors of the vehicle via a injection pump. The injectors and the injection pump have a return circuit which returns to the tank the excess fuel supplied to the injectors by the injection pump as well as the excess fuel which is not sprayed by the injector. It has appeared that such fuel supply installations comprising a liquid purification fuel filter are of faulty operation insofar as there is very often entrainment of the filtering liquid by the fuel. Thus, these known installations can only operate correctly for relatively low fuel flow rates.
La présente invention a notamment pour but de remédier à ces inconvénients et concerne à cet effet une installation d'alimentation en carburant pour véhicules et notamment pour véhicules automobiles, comportant une pompe d'alimentation aspirant le carburant d'un réservoir par l'intermédiaire d'un filtre de carburant à épuration liquide, cette pompe refoulant le carburant vers les injecteurs par une pompe d'injection pourvue d'un circuit de retour de pompe, installation caractérisée en ce que le circuit de retour de la pompe d'injection est branché par son extrémité aval sur la canalisation reliant le filtre à épuration liquide et la pompe d'alimentation.The present invention aims in particular to remedy these drawbacks and for this purpose relates to a fuel supply installation for vehicles and in particular for motor vehicles, comprising a supply pump sucking the fuel from a tank via a liquid purification fuel filter, this pump delivering the fuel to the injectors by an injection pump provided with a pump return circuit, installation characterized in that the return circuit of the injection pump is connected by its downstream end to the pipe connecting the liquid purification filter and the feed pump.
Suivant une autre caractéristique de l'invention, le filtre à épuration liquide comporte un réceptacle pourvu d'un couvercle traversé par des perçages correspondant, l'un à l'arrivée, dans le réceptacle du filtre, du carburant non filtré, l'autre à la sortie du carburant filtré vers la canalisation reliée à la pompe d'alimentation et sur laquelle est branchee la canalisation de retour de la pompe d'injection, le perçage pour le carburant non filtré se prolongeant dans le réceptacle par une embouchure évasée.According to another characteristic of the invention, the liquid purification filter comprises a receptacle provided with a cover crossed by corresponding bores, one on arrival, in the receptacle of the filter, unfiltered fuel, the other at the outlet of the filtered fuel to the line connected to the feed pump and to which the return line of the injection pump is connected, the hole for the unfiltered fuel extending into the receptacle by a flared mouth.
Suivant une autre caractéristique de l'invention, le perçage pour le carburant non filtré se prolonge dans le réceptacle par une partie conique.According to another characteristic of the invention, the hole for unfiltered fuel is extended in the receptacle by a conical part.
Suivant une autre caractéristique de l'invention, le réceptacle du filtre comporte une tubulure coudée noyée dans le carburant et le liquide d'épuration, cette tubulure se prolongeant par sa partie coudée jusqu'à proximité de la base du réceptacle, les deux extrémités de cette tubulure aboutissant à des perçages du couvercle et étant reliées à une canalisation de circulation d'eau chaude d'un circuit de chauffage du véhicule.According to another characteristic of the invention, the receptacle of the filter comprises a bent tubing embedded in the fuel and the cleaning liquid, this tubing extending by its bent part until close to the base of the receptacle, the two ends of this tubing leading to holes in the cover and being connected to a hot water circulation pipe of a vehicle heating circuit.
L'invention est représentée à titre d'exemples non limitatifs sur les dessins ci-joints dans lesquels :The invention is shown by way of nonlimiting examples in the accompanying drawings in which:
- la figure 1 est le schéma d'une installation d'alimentation conforme à l'invention, - la figure 2 est un schéma correspondant à la figure 1, plus particulièrement destiné à l'alimentation en carburant d'un camion.FIG. 1 is the diagram of a supply installation in accordance with the invention, - Figure 2 is a diagram corresponding to Figure 1, more particularly intended for the fuel supply of a truck.
La présente invention a en conséquence pour but la réalisation d'une installation d'alimentation en carburant de véhicules, qui assure un filtrage efficace du carburant sans qu'il risque de se produire un entraînement du liquide d'épuration avec le carburant filtré, ce qui serait la cause de ratés et d'une manière générale, d'un mauvais fonctionnement du moteur.The object of the present invention is therefore to provide an installation for supplying fuel to vehicles, which ensures efficient filtering of the fuel without the risk of entraining the cleaning liquid with the filtered fuel, this which would be the cause of failures and in general, a malfunction of the engine.
Sur la figure 1, l'installation comprend un réservoir de carburant 1 qui est destiné à alimenter les injecteurs 2 du véhicule par l'intermédiaire, d'un clapet anti-retour 3, d'un filtre de carburant à épuration liquide 4, d'une pompe d'alimentation 5, d'un filtre à carburant en papier 6 et d'une pompe d'injection 7 dont les canalisations de sortie sont reliées aux divers injecteurs 2.In FIG. 1, the installation comprises a fuel tank 1 which is intended to supply the injectors 2 of the vehicle via, a non-return valve 3, a fuel filter with liquid purification 4, d a feed pump 5, a paper fuel filter 6 and an injection pump 7, the outlet pipes of which are connected to the various injectors 2.
Le filtre de carburant à épuration liquide 4 comprend un réceptacle en forme de cloche 8 en matériau transparent, dont l'extrémité supérieure ouverte est obturée par un couvercle 9 pourvu de perçages 10 et 11 destinés respectivement, à l'alimentation du filtre par le carburant issu du réservoir et à l'alimentation de la pompe 5 par le carburant filtré.The liquid purification fuel filter 4 comprises a bell-shaped receptacle 8 made of transparent material, the open upper end of which is closed by a cover 9 provided with holes 10 and 11 intended respectively for supplying the filter with fuel. from the tank and the pump 5 is supplied with filtered fuel.
La moitié inférieure de la cloche 5 comporte un liquide 12 de densité plus lourde que celle du gas oil, alors que la partie supérieure est remplie de gas oil filtré 13 s'évacuant par le perçage 11. Le perçage 10 se prolonge à l'intérieur de la cloche 8 et jusque dans le liquide d'épuration 12 par une partie conique 14. Cette partie conique 14 est donc remplie de gas oil non filtré et au fur et à mesure de l'évacuation du gas oil filtré 13 par la pompe d'alimentation 5, le gas oil non filtré de la partie conique 14 s'évacue par la périphérie de son orifice inférieur pour remonter jusqu'à la ligne de séparation des deux liquides 12 et 13.The lower half of the bell 5 has a liquid 12 with a density heavier than that of the gas oil, while the upper part is filled with filtered gas oil 13 evacuated by the hole 11. The hole 10 extends inside from the bell 8 and into the purification liquid 12 by a conical part 14. This conical part 14 is therefore filled with unfiltered gas oil and as the filtered gas oil 13 is evacuated by the pump d 5, unfiltered gas oil from the conical part 14 is evacuated through the periphery of its lower orifice to go up to the line of separation of the two liquids 12 and 13.
Cette pièce conique 14 permet d'obtenir, par son orifice inférieur de grande surface, une surface de contact plus importante entre le liquide d'épuration et le carburant à épurer. En outre, du fait de la périphérie plus importante de cet orifice inférieur 141, le carburant à filtrer déborde de cet orifice inférieur sous la forme d'un cylindre lamellaire favorisant le filtrage du carburant passant au travers du liquide 12. Comme cela est également représenté, la cloche 8 comporte une tubulure coudée 15 qui se prolonge par son coude en 151 jusqu'à proximité de la base de la cloche 8, tandis que les extrémités de cette tubulure sont raccordées, à l'opposé l'une de l'autre, à des perçages 16 et 17 prévus dans le couvercle 9. Ces perçages 16 et 17 sont reliés par des canalisations de circulation d'eau 18 à une installation 19 de chauffage du véhicule. Une telle disposition permet d'obtenir un chauffage rapide et régulier du carburant à filtrer, du fait que la tubulure 15 se trouve plongée à la fois dans le liquide d'épuration 12 et dans le carburant filtré 13. La pompe d'injection 7 comporte, comme cela est connu, une canalisation 20 destinée à assurer le retour du carburant. Cependant, conformément à l'invention, cette canalisation 20 est branchée sur la canalisation 21 c'est-à-dire entre le couvercle 9 et la pompe d'alimentation 5, de manière que cette pompe d'alimentation 5 soit alimentée, à partir d'un raccord en "T" situé en 22, par le carburant en excédent de la pompe d'injection et par le carburant qui vient d'être filtré par le filtre 4. On constate ainsi que le carburant qui est envoyé vers les injecteurs, correspond très exactement à chaque instant à celui qui est filtré par le filtre à épuration liquide 4, ce qui permet de réduire le débit nécessaire de ce filtre pour obtenir une meilleure qualité de filtrage.This conical part 14 makes it possible to obtain, through its large large lower orifice, a greater contact surface between the cleaning liquid and the fuel to be cleaned. In addition, due to the larger periphery of this lower orifice 14 1 , the fuel to be filtered overflows from this lower orifice in the form of a lamellar cylinder favoring the filtering of the fuel passing through the liquid 12. As is also shown, the bell 8 comprises a bent tube 15 which is extended by its elbow at 15 1 as close to the base of the bell 8, while the ends of this tube are connected, opposite one of the 'other, to holes 16 and 17 provided in the cover 9. These holes 16 and 17 are connected by water circulation pipes 18 to an installation 19 for heating the vehicle. Such an arrangement makes it possible to obtain rapid and regular heating of the fuel to be filtered, owing to the fact that the tube 15 is immersed both in the purification liquid 12 and in the filtered fuel 13. The injection pump 7 comprises , as is known, a line 20 intended to ensure the return of the fuel. However, in accordance with the invention, this pipe 20 is connected to the pipe 21, that is to say between the cover 9 and the feed pump 5, so that this feed pump 5 is supplied, from a "T" fitting located at 22, by the excess fuel from the injection pump and by the fuel which has just been filtered by the filter 4. It can thus be seen that the fuel which is sent to the injectors , corresponds very exactly at all times to the one that is filtered by the filter at liquid purification 4, which makes it possible to reduce the necessary flow rate of this filter to obtain a better quality of filtration.
Bien entendu, comme cela est connu, les injecteurs 2 eux-mêmes sont reliés par une canalisation de retour 23 au réservoir 1, afin de ramener dans ce réservoir le carburant en excédent non pulvérisé par les injecteurs.Of course, as is known, the injectors 2 themselves are connected by a return line 23 to the tank 1, in order to bring back into this tank the excess fuel not sprayed by the injectors.
On constate donc que, par l'installation décrite, on améliore le fonctionnement de l'installation en améliorant le filtrage à l'intérieur du filtre à épuration liquide 4 et en réduisant le débit nécessaire de carburant filtré à celui qui est amené aux injecteurs du véhicule. L'installation représentée sur la figure 2 correspond à celle de la figure 1, mis à part qu'elle met en oeuvre deux filtres de carburant à épuration liquide 41 et 42 dont les deux tubulures de réchauffage 15 sont reliées en série aux canalisations 18 du circuit de chauffage.It is therefore found that, by the installation described, the operation of the installation is improved by improving the filtering inside the liquid purification filter 4 and by reducing the required flow rate of filtered fuel to that which is brought to the injectors of the vehicle. The installation shown in FIG. 2 corresponds to that of FIG. 1, except that it implements two liquid purification fuel filters 4 1 and 4 2 , the two heating pipes 15 of which are connected in series to the pipes. 18 of the heating circuit.
Les deux perçages 11 sont reliés ensemble en un même point 24 à un raccord à quatre branches, auquel aboutissent également la canalisation 20 constituant la canalisation de retour de la pompe d'injection 7 et la canalisation 21 reliée à la pompe d'alimentation 5. Cette disposition permet d'obtenir un montage strictement parallèle des deux filtres 41, 42 afin d'éviter tout déséquilibre de filtrage, ce qui se produirait si les canalisations 20 et 21 et les perçages 11 étaient reliés en des points différents.The two holes 11 are connected together at the same point 24 to a connector with four branches, to which also lead the pipe 20 constituting the return pipe of the injection pump 7 and the pipe 21 connected to the supply pump 5. This arrangement makes it possible to obtain a strictly parallel mounting of the two filters 4 1 , 4 2 in order to avoid any filtering imbalance, which would occur if the pipes 20 and 21 and the holes 11 were connected at different points.
Ainsi, au point 24, le carburant filtré issu des filtres 41 et 42 correspond à celui aspiré par la pompe 25 diminué du carburant refoulé par la canalisation 20 et la pression d'aspiration résultante est divisée en deux parties égales assurant la remontée du carburant filtré contenu, dans les deux cloches 8, au-dessus du liquide d'épuration 12.Thus, at point 24, the filtered fuel coming from the filters 4 1 and 4 2 corresponds to that sucked by the pump 25 minus the fuel discharged through the line 20 and the resulting suction pressure is divided into two equal parts ensuring the ascent of the filtered fuel contained, in the two bells 8, above the purification liquid 12.
Dans ce circuit plus particulièrement destiné à l'alimentation en carburant de camions, la canalisation 21 comportera de préférence un pré-filtre 25 avec pompe de réamorçage.In this circuit more particularly intended for supplying fuel to trucks, the pipe 21 will preferably include a pre-filter 25 with a priming pump.
La présente description se rapporte plus particulièrement à une installation d'alimentation en carburant pour véhicule Diesel. Elle pourra cependant être mise en oeuvre pour des véhicules à essence utilisant un liquide de filtrage non miscible avec l'essence et de préférence qui n'est pas susceptible de se congeler. The present description relates more particularly to a fuel supply installation for a diesel vehicle. However, it can be implemented for petrol vehicles using a filter liquid immiscible with petrol and preferably which is not liable to freeze.

Claims

REVENDICATIONS
1) Installation d'alimentation en carburant pour véhicules et notamment pour véhicules automobiles, comportant une pompe d'alimentation (5) aspirant le carburant d'un réservoir par l'intermédiaire d'un filtre de carburant à épuration liquide (4), cette pompe refoulant le carburant vers les injecteurs (2) par une pompe d'injection (7) pourvue d'un circuit de retour de pompe (20), installation caractérisée en ce que le circuit (20) de retour de la pompe d'injection est branché par son extrémité aval sur la canalisation (21) reliant le filtre à épuration liquide (4) et la pompe d'alimentation (5).1) Fuel supply installation for vehicles and in particular for motor vehicles, comprising a supply pump (5) sucking fuel from a tank via a liquid purification fuel filter (4), this pump delivering fuel to the injectors (2) by an injection pump (7) provided with a pump return circuit (20), installation characterized in that the return circuit (20) of the injection pump is connected by its downstream end to the pipe (21) connecting the liquid purification filter (4) and the feed pump (5).
2) Installation conforme à la revendication 1, caractérisée en ce que le filtre à épuration liquide (4) comporte un réceptacle (8) pourvu d'un couvercle (9) traversé par des perçages (10, 11) correspondant, l'un, à l'arrivée, dans le réceptacle du filtre, du carburant non filtré, l'autre à la sortie du carburant filtré vers la canalisation (21) reliée à la pompe d'alimentation (5) et sur laquelle est branchée la canalisation (20) de retour de la pompe d'injection, le perçage (10) pour le carburant non filtré se prolongeant dans le réceptacle par une embouchure évasée.2) Installation according to claim 1, characterized in that the liquid purification filter (4) comprises a receptacle (8) provided with a cover (9) crossed by corresponding holes (10, 11), one, at the inlet, in the filter receptacle, of unfiltered fuel, the other at the outlet of the filtered fuel towards the line (21) connected to the supply pump (5) and on which the line (20) is connected ) back from the injection pump, the hole (10) for unfiltered fuel extending into the receptacle by a flared mouth.
3) Installation conforme à la revendication 2, caractérisée en ce que le perçage (10) pour le carburant non filtré, se prolonge dans le réceptacle par une partie conique.3) Installation according to claim 2, characterized in that the bore (10) for unfiltered fuel, extends into the receptacle by a conical part.
4) Installation conforme à l'une quelconque des revendications précédentes, caractérisée en ce que le réceptacle (8) du filtre comporte une tubulure coudée (15) noyée dans le carburant et le liquide d'épuration, cette tubulure se prolongeant par sa partie coudée (151) jusqu'à proximité de la base du réceptacle, les deux extrémités de cette tubulure aboutissant à des perçages (16 et 17) du couvercle et étant reliées à une canalisation de circulation d'eau chaude (18) d'un circuit de chauffage du véhicule.4) Installation according to any one of the preceding claims, characterized in that the receptacle (8) of the filter comprises a bent tube (15) embedded in the fuel and the cleaning liquid, this tube extending by its bent part (15 1 ) near the base of the receptacle, the two ends of this tubing leading to holes (16 and 17) of the cover and being connected to a pipe of circulation of hot water (18) of a vehicle heating circuit.
5) Installation conforme à l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte deux filtres à épuration liquide (41, 42) dont les perçages (11) du couvercle pour la sortie du carburant épuré sont reliés ensemble en un même point avec la canalisation (20) de retour de la pompe d'injection et avec la canalisation (21) reliée à la pompe d'alimentation. 5) Installation according to any one of the preceding claims, characterized in that it comprises two liquid purification filters (4 1 , 4 2 ) whose holes (11) of the cover for the outlet of the purified fuel are connected together in the same point with the return pipe (20) of the injection pump and with the pipe (21) connected to the supply pump.
EP87904062A 1986-07-07 1987-06-25 Fuel supply system for vehicles and particularly for motor vehicles Withdrawn EP0277960A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8609826 1986-07-07
FR8609826A FR2601079B1 (en) 1986-07-07 1986-07-07 FUEL SUPPLY SYSTEM FOR VEHICLE AND PARTICULARLY FOR MOTOR VEHICLE.

Publications (1)

Publication Number Publication Date
EP0277960A1 true EP0277960A1 (en) 1988-08-17

Family

ID=9337137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904062A Withdrawn EP0277960A1 (en) 1986-07-07 1987-06-25 Fuel supply system for vehicles and particularly for motor vehicles

Country Status (4)

Country Link
EP (1) EP0277960A1 (en)
AU (1) AU7546587A (en)
FR (1) FR2601079B1 (en)
WO (1) WO1988000291A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401821A (en) * 2016-10-31 2017-02-15 江阴市天润机械制造有限公司 Simple diesel filter heater

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049038B (en) * 1979-05-12 1983-03-30 Lucas Industries Ltd Fuel supply system for a diesel engine
US4368716A (en) * 1980-09-19 1983-01-18 Davco, Inc. Fuel processor apparatus for diesel powered vehicles
GB2114237B (en) * 1982-01-23 1985-06-05 Lucas Ind Plc Fuel treatment device
FR2541376B1 (en) * 1983-02-21 1987-05-15 Peugeot IMPROVED FUEL SUPPLY DEVICE OF THE DIESEL TYPE AND EQUIPPED WITH A FLOW METER
JPS60132061A (en) * 1983-12-21 1985-07-13 Toyota Motor Corp Removal of moisture in fuel
FR2562603A1 (en) * 1984-04-04 1985-10-11 Schmidt Jean Claude GASOLINE FILTERING AND HEATING DEVICE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8800291A1 *

Also Published As

Publication number Publication date
FR2601079A1 (en) 1988-01-08
FR2601079B1 (en) 1990-08-17
WO1988000291A1 (en) 1988-01-14
AU7546587A (en) 1988-01-29

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