FR2772838A1 - Cooling system for fuel in engines - Google Patents

Cooling system for fuel in engines Download PDF

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Publication number
FR2772838A1
FR2772838A1 FR9716395A FR9716395A FR2772838A1 FR 2772838 A1 FR2772838 A1 FR 2772838A1 FR 9716395 A FR9716395 A FR 9716395A FR 9716395 A FR9716395 A FR 9716395A FR 2772838 A1 FR2772838 A1 FR 2772838A1
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France
Prior art keywords
fuel
air
heat exchanger
tank
engine
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Granted
Application number
FR9716395A
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French (fr)
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FR2772838B1 (en
Inventor
Philippe Jouanny
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.)
Valeo Thermique Moteur SA
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Valeo Thermique Moteur SA
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Application filed by Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Priority to FR9716395A priority Critical patent/FR2772838B1/en
Publication of FR2772838A1 publication Critical patent/FR2772838A1/en
Application granted granted Critical
Publication of FR2772838B1 publication Critical patent/FR2772838B1/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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • 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

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  • 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)

Abstract

The fuel system consists of a fuel tank (1), supplying fuel to the injectors (4), with a fuel reflow circuit (6) to return the fuel to the tank. The excess fuel emerging from the injector, is passed through a heat exchanger (7), which uses the flow of incoming air to cool the fuel, which is then returned to the fuel tank, and the air is supplied to the engine inlet.

Description

Dispositif de refroidissement de carburant d'un moteur, notamment d'un moteur diesel
La présente invention concerne le refroidissement de carburant d'un moteur, notamment d'un moteur diesel, comprenant un réservoir, des moyens d'injection, un circuit retour pour acheminer à destination du réservoir le carburant en excédent issu des moyens d'injection.Fuel cooling device for an engine, especially a diesel engine
The present invention relates to the cooling of fuel for an engine, in particular a diesel engine, comprising a tank, injection means, a return circuit for conveying excess fuel from the injection means to the tank.

Actuellement, pour limiter la consommation de carburant et la pollution, les moyens d'injection sont contraints d'injecter dans le bloc moteur un carburant à température très élevée.Currently, to limit fuel consumption and pollution, the injection means are forced to inject into the engine block a fuel at very high temperature.

Dans ces conditions, le carburant en excédent issu des moyens d'injection est lui aussi à température très élevée et échauffe par conséquent le carburant contenu dans le réservoir, après reflux du carburant en excédent via le circuit retour.Under these conditions, the excess fuel from the injection means is also at a very high temperature and consequently heats the fuel contained in the tank, after reflux of the excess fuel via the return circuit.

Un tel échauffement du carburant dans le réservoir est insatisfaisant sur le plan de la sécurité.Such heating of the fuel in the tank is unsatisfactory from a safety point of view.

La présente invention remédie à cet inconvénient.The present invention overcomes this drawback.

Elle porte sur un dispositif de refroidissement du carburant d'un moteur, notamment d'un moteur diesel, comprenant un réservoir, des moyens d'injection, un circuit retour pour acheminer à destination du réservoir le carburant en excédent issu des moyens d'injection.It relates to a device for cooling the fuel of an engine, in particular a diesel engine, comprising a reservoir, injection means, a return circuit for conveying excess fuel from the injection means to the reservoir. .

Selon une définition générale de l'invention, le circuit retour comprend un échangeur de chaleur de type air/carburant comprenant une entrée recevant le carburant en excédent provenant des moyens d'injection et une sortie délivrant à destination du réservoir le carburant refroidi par l'échan- geur, l'échangeur de chaleur étant intégré dans la ligne d'admission d'air du moteur. According to a general definition of the invention, the return circuit comprises an air / fuel type heat exchanger comprising an inlet receiving the excess fuel from the injection means and an outlet delivering to the tank the fuel cooled by the exchanger, the heat exchanger being integrated in the engine air intake line.

L'avantage d'intégrer un échangeur de chaleur dans la ligne d'air d'admission du moteur est de disposer facilement d'un air frais sous le capot moteur, de refroidir convenablement le carburant en excédent et de protéger ledit échangeur de chaleur des chocs et d'éviter ainsi les risques qui en découlent (fuite, incendie,...).The advantage of integrating a heat exchanger into the intake air line of the engine is to easily have fresh air under the engine hood, to cool the excess fuel properly and to protect the said heat exchanger from shocks and thus avoid the resulting risks (leak, fire, ...).

Selon un mode de réalisation préféré de l'invention, l'échan- geur de chaleur est disposé en aval du filtre à air, selon le sens de propagation de l'air.According to a preferred embodiment of the invention, the heat exchanger is arranged downstream of the air filter, in the direction of propagation of the air.

Selon un autre mode de réalisation, l'échangeur de chaleur est disposé en amont du filtre à air, selon le sens de propagation de l'air.According to another embodiment, the heat exchanger is arranged upstream of the air filter, according to the direction of propagation of the air.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lumière de la description détaillée ciaprès et du dessin annexé dans lequel la figure unique illustre le schéma de principe du refroidissement de carburant intégré à la ligne d'air d'admission selon l'invention.Other characteristics and advantages of the invention will appear in the light of the detailed description below and of the appended drawing in which the single figure illustrates the block diagram of the fuel cooling integrated into the intake air line according to the invention.

La représentation schématique de la figure unique montre dans le détail un réservoir de carburant 1, un circuit aller de carburant 2 dans lequel est inséré un filtre à carburant 3, des moyens d'injection 4, et un bloc moteur 5.The schematic representation of the single figure shows in detail a fuel tank 1, a forward fuel circuit 2 in which a fuel filter 3 is inserted, injection means 4, and an engine block 5.

Les moyens d'injection 4 sont prévus pour injecter dans le bloc moteur 5 un carburant à très haute température.The injection means 4 are provided for injecting into the engine block 5 a fuel at very high temperature.

De préférence mais non limitativement, le bloc moteur est celui d'un moteur diesel, par exemple de type à injection directe du genre "COMMON RAIN" ou de type injecteur-pompe.Preferably but not limited to, the engine block is that of a diesel engine, for example of the direct injection type of the "COMMON RAIN" type or of the injector-pump type.

Un circuit retour 6 achemine, à destination du réservoir 1, le carburant en excédent issu des moyens d'injection 4.A return circuit 6 routes excess fuel from the injection means 4 to the reservoir 1.

Pour refroidir le carburant en excédent acheminé à destination du réservoir, il est prévu selon l'invention d'implanter un échangeur de chaleur 7 comprenant une entrée 8 recevant le carburant en excédent issu des moyens d'injection 4 et une sortie 9 délivrant le carburant refroidi par l'échangeur 7 à destination du réservoir 1.To cool the excess fuel supplied to the tank, it is provided according to the invention to install a heat exchanger 7 comprising an inlet 8 receiving the excess fuel from the injection means 4 and an outlet 9 delivering the fuel cooled by the heat exchanger 7 to the tank 1.

De préférence, l'échangeur de chaleur est de type air/carburant. I1 est réalisé par exemple en technologie à tubes avec ou sans ailettes de refroidissement ou à plaques.Preferably, the heat exchanger is of the air / fuel type. I1 is produced for example in tube technology with or without cooling fins or plates.

Selon l'invention, l'échangeur de chaleur est balayé par de l'air extérieur provenant de la ligne d'air d'admission du moteur 10. En pratique, la ligne d'air 10 comprend une source d'air frais 11 provenant de l'extérieur, un filtre à air 12, une durit d'air d'admission 13 et des moyens d'admission 14.According to the invention, the heat exchanger is swept by outside air coming from the intake air line of the engine 10. In practice, the air line 10 comprises a source of fresh air 11 coming from the outside, an air filter 12, an intake air hose 13 and intake means 14.

De préférence, l'échangeur de chaleur est disposé en aval du filtre à air 12 de la ligne d'air d'admission 10, mais il peut être envisagé de le disposer en amont du filtre.Preferably, the heat exchanger is arranged downstream of the air filter 12 from the intake air line 10, but it can be envisaged to have it upstream of the filter.

L'air issu de l'échangeur est acheminé à destination des moyens d'admission 14 via la durit d'admission 13.The air from the exchanger is sent to the intake means 14 via the intake hose 13.

Grâce à l'invention, l'échangeur dispose d'air frais pour refroidir le carburant en excédent qui circule dans l'échan- geur.Thanks to the invention, the exchanger has fresh air to cool the excess fuel which circulates in the exchanger.

Bien évidemment, l'implantation de l'échangeur selon l'invention est susceptible d'engendrer une surchauffe de l'air d'admission, mais cette surchauffe reste dans des proportions raisonnables, inférieure à 10 par exemple.Obviously, the location of the exchanger according to the invention is capable of causing an overheating of the intake air, but this overheating remains in reasonable proportions, less than 10 for example.

De plus, cette surchauffe est susceptible d'être compensée en partie par de moindres échauffements parasites, et le cas échéant, par l'efficacité de moyens de refroidissement d'air (dont les turbo-diesels sont généralement pourvus).In addition, this overheating is likely to be compensated in part by less parasitic overheating, and if necessary, by the efficiency of air cooling means (which turbo-diesels are generally provided).

I1 convient de remarquer que l'implantation de l'échangeur de chaleur est ici avantageusement dans le compartiment moteur, et de préférence sous le capot moteur. I1 en résulte une meilleure sécurité par rapport à l'implantation d'un échan geur carburant/air en face avant du véhicule, puisqu'une telle implantation imposerait des tuyaux de carburant relativement longs et surtout une exposition relativement importante de l'échangeur aux chocs avec tous les risques que cela comporte (fuite, incendie, ...).  It should be noted that the location of the heat exchanger is here advantageously in the engine compartment, and preferably under the engine hood. This results in better security compared to the installation of a fuel / air exchanger on the front face of the vehicle, since such an installation would require relatively long fuel pipes and above all a relatively large exposure of the exchanger to shocks. with all the risks that this entails (leak, fire, ...).

Claims (5)

Revendications 1. Dispositif de refroidissement de carburant d'un moteur, notamment d'un moteur diesel, comprenant un réservoir (1), des moyens d'injection (4), un circuit retour (6) pour acheminer, à destination du réservoir (1), le carburant en excédent issu des moyens d'injection (4), caractérisé en ce qu'il comprend un échangeur de chaleur (7) de type air/carburant comprenant une entrée (8) de carburant recevant le carburant en excédent issu des moyens d'injection (4) et une sortie (9) délivrant à destination du réservoir (1) le carburant refroidi par l'échangeur, l'échangeur de chaleur (7) étant intégré dans la ligne d'air d'admission du moteur (10). Claims 1. Device for cooling the fuel of an engine, in particular a diesel engine, comprising a tank (1), injection means (4), a return circuit (6) for conveying, to the tank ( 1), the excess fuel from the injection means (4), characterized in that it comprises a heat exchanger (7) of the air / fuel type comprising a fuel inlet (8) receiving the excess fuel from injection means (4) and an outlet (9) delivering to the tank (1) the fuel cooled by the exchanger, the heat exchanger (7) being integrated in the intake air line of the motor (10). 2. Dispositif selon la revendication 1, caractérisé en ce que l'échangeur de chaleur (7) est disposé en aval du filtre à air du moteur (12), selon le sens de propagation de l'air.2. Device according to claim 1, characterized in that the heat exchanger (7) is arranged downstream of the engine air filter (12), in the direction of air propagation. 3. Dispositif selon la revendication 1, caractérisé en ce que l'échangeur de chaleur (7) est disposé en amont du filtre à air du moteur (12), selon le sens de propagation de l'air.3. Device according to claim 1, characterized in that the heat exchanger (7) is arranged upstream of the engine air filter (12), in the direction of air propagation. 4. Dispositif selon la revendication 1, caractérisé en ce que l'échangeur (7) est à tubes.4. Device according to claim 1, characterized in that the exchanger (7) is with tubes. 5. Dispositif selon la revendication 1, caractérisé en ce que l'échangeur (7) est à plaques. 5. Device according to claim 1, characterized in that the exchanger (7) is plate.
FR9716395A 1997-12-23 1997-12-23 FUEL COOLING DEVICE OF AN ENGINE, ESPECIALLY A DIESEL ENGINE Expired - Lifetime FR2772838B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9716395A FR2772838B1 (en) 1997-12-23 1997-12-23 FUEL COOLING DEVICE OF AN ENGINE, ESPECIALLY A DIESEL ENGINE

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Application Number Priority Date Filing Date Title
FR9716395A FR2772838B1 (en) 1997-12-23 1997-12-23 FUEL COOLING DEVICE OF AN ENGINE, ESPECIALLY A DIESEL ENGINE

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FR2772838A1 true FR2772838A1 (en) 1999-06-25
FR2772838B1 FR2772838B1 (en) 2000-09-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7011142B2 (en) 2000-12-21 2006-03-14 Dana Canada Corporation Finned plate heat exchanger
US7025127B2 (en) 2002-07-05 2006-04-11 Dana Canada Corporation Baffled surface cooled heat exchanger
US7182125B2 (en) 2003-11-28 2007-02-27 Dana Canada Corporation Low profile heat exchanger with notched turbulizer
US7213638B2 (en) 2003-04-11 2007-05-08 Dana Canada Corporation Heat exchanger with flow circuiting end caps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491117A (en) * 1983-02-24 1985-01-01 Toyota Jidosha Kabushiki Kaisha Apparatus for supplying cooled fuel to an engine
US4924838A (en) * 1989-04-26 1990-05-15 Navistar International Transportation Corp. Charge air fuel cooler
JPH08121269A (en) * 1994-10-28 1996-05-14 Hitachi Constr Mach Co Ltd Fuel cooling device
DE29715878U1 (en) * 1997-09-04 1997-10-23 Sander KG GmbH & Co., 77871 Renchen Radiator for diesel oil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491117A (en) * 1983-02-24 1985-01-01 Toyota Jidosha Kabushiki Kaisha Apparatus for supplying cooled fuel to an engine
US4924838A (en) * 1989-04-26 1990-05-15 Navistar International Transportation Corp. Charge air fuel cooler
JPH08121269A (en) * 1994-10-28 1996-05-14 Hitachi Constr Mach Co Ltd Fuel cooling device
DE29715878U1 (en) * 1997-09-04 1997-10-23 Sander KG GmbH & Co., 77871 Renchen Radiator for diesel oil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 96, no. 9 30 September 1996 (1996-09-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7011142B2 (en) 2000-12-21 2006-03-14 Dana Canada Corporation Finned plate heat exchanger
US7025127B2 (en) 2002-07-05 2006-04-11 Dana Canada Corporation Baffled surface cooled heat exchanger
US7213638B2 (en) 2003-04-11 2007-05-08 Dana Canada Corporation Heat exchanger with flow circuiting end caps
US7182125B2 (en) 2003-11-28 2007-02-27 Dana Canada Corporation Low profile heat exchanger with notched turbulizer

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Publication number Publication date
FR2772838B1 (en) 2000-09-22

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