WO1995004883A1 - Device for cooling the injectors of an electronic fuel-injection engine - Google Patents

Device for cooling the injectors of an electronic fuel-injection engine Download PDF

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Publication number
WO1995004883A1
WO1995004883A1 PCT/FR1994/000964 FR9400964W WO9504883A1 WO 1995004883 A1 WO1995004883 A1 WO 1995004883A1 FR 9400964 W FR9400964 W FR 9400964W WO 9504883 A1 WO9504883 A1 WO 9504883A1
Authority
WO
WIPO (PCT)
Prior art keywords
injectors
tube
cooling
injector
injection engine
Prior art date
Application number
PCT/FR1994/000964
Other languages
French (fr)
Inventor
Michel Dhaussy
Original Assignee
Michel Dhaussy
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 Michel Dhaussy filed Critical Michel Dhaussy
Publication of WO1995004883A1 publication Critical patent/WO1995004883A1/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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the present invention relates to a device for cooling the injectors on an electronic injection engine.
  • the device according to the invention comprises (see plan according to FIG. 1): 1 fuel supply tube (1) made of steel outside diameter 5 m / m, inside diameter 4 m / m (passage section 12 m / m 2 ), 1 capillary tube (2) made of copper or steel, outside diameter 3 m / m, inside diameter 2 m / m (passage section 3 m / m 2 ).
  • This capillary tube connects the fuel inlet tube to the injector through the existing tube (4) and is positioned concentrically inside the injector connection tube over the entire length of this tube (approximately 12 m / m).
  • the injector is then connected to the existing pipes without modifications, the main pipe being closed on the fuel supply side and connected without modifications to the pressure regulator.
  • a ring will be brazed (5) to provide reinforcement to the capillary tube between the tube (1) and the tube (4). Description of the operation: The gasoline coming from the tank arrives at a pressure of 2 bars by the capillary tube inside the injector while cooling it, then flows towards the pressure regulator by the annular space (passage section 6 m / m 2 ) left between the capillary tube and the injector connection tube.
  • the capillary tube with an internal diameter of 2 m / m is sufficient because the diameter of the nozzle of the injector does not exceed 1 m / m; at a pressure of 2 bars, the flow rate of the cooling fuel is approximately 70 liters per hour for an engine of
  • the length of the capillary tube is not limiting, which allows any form of connection. Note 4:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A device for cooling the injectors of an electronic fuel-injection engine. The device consists of a fuel feed pipe (1) with a capillary tube (2) extending therefrom and into the injector connection pipe (3) through the original fuel feed pipe (4) which is sealed opposite the pressure controller connection. The injector is connected unchanged to the original fuel feed pipe. Said device is useful for cooling the injectors of an electronic fuel-injectionengine.

Description

DISPOSITIF DE REFROIDISSEMENT DES INJECTEURS SUR MOTEUR À INJECTION ÉLECTRONIQUE ESSENCE COOLING DEVICE FOR INJECTORS ON A PETROL ELECTRONIC INJECTION ENGINE
La présente invention concerne un dispositif de refroidissement des injecteurs sur moteur à injection électronique.The present invention relates to a device for cooling the injectors on an electronic injection engine.
Actuellement, ces injecteurs ne sont pratiquement pas refroidis, car l'essence en provenance du réservoir ne fait qu'effleurer l'extrémité du tube de jonction de l'injecteur avec le tube d'arrivée d'essence. Une autre disposition consiste à entourer d'une bague le corps de l'injecteur, solution qui entraîne une construction spéciale des injecteurs existants et un refroidissement partiel. Le dispositif selon l'invention comprend (voir plan suivant figure 1 ) : 1 tube d'arrivée d'essence (1 ) en acier diamètre extérieur 5 m/m, diamètre intérieur 4 m/m (section de passage 12 m/m2), 1 tube capillaire (2) en cuivre ou en acier, diamètre extérieur 3 m/m, diamètre intérieur 2 m/m (section de passage 3 m/m2). Ce tube capillaire relie le tube d'arrivée d'essence à l'injecteur en traversant le tube existant (4) et se positionne concentriquement à l'intérieu r du tube de raccordement de l'injecteur sur toute la longueur de ce tube (environ 12 m/m). L'injecteur est ensuite raccordé aux canalisations existantes sans modifications, la canalisation principale étant obturée côté arrivée d'essence et reliée sans modifications au régulateur de pression. Une bague sera brasée (5) pour assurer un renfort au tube capillaire entre le tube (1 ) et le tube (4). Description du fonctionnement : L'essence en provenance du réservoir arrive sous une pression de 2 bars par le tube capillaire à l'intérieur de l'injecteur en le refroidissant, puis chemine vers le régulateur de pression par l'espace annulaire (section de passage 6 m/m2) laissé entre le tube capillaire et le tube de raccordement de l'injecteur. Intérêt de ce dispositif : Le refroidissement de l'injecteur est efficace, ce qui permet une meilleure maîtrise du dosage du carburant ; en effet, lorsque le moteur tourne au ralenti ou lorsqu'au cours de décélération, l'injection est coupée, la température du carburant augmente sensiblement au niveau du point d'injection car il ne circule plus ou très peu à l'intérieur de l'injecteur, ce qui compte tenu de la tension de vapeur de carburant, entraîne une modification de la carburation (mélange plus pauvre pour une ouverture du papillon déterminée).Currently, these injectors are practically not cooled, because the petrol coming from the tank only touches the end of the junction tube of the injector with the petrol arrival tube. Another arrangement consists in surrounding the body of the injector with a ring, a solution which involves a special construction of the existing injectors and partial cooling. The device according to the invention comprises (see plan according to FIG. 1): 1 fuel supply tube (1) made of steel outside diameter 5 m / m, inside diameter 4 m / m (passage section 12 m / m 2 ), 1 capillary tube (2) made of copper or steel, outside diameter 3 m / m, inside diameter 2 m / m (passage section 3 m / m 2 ). This capillary tube connects the fuel inlet tube to the injector through the existing tube (4) and is positioned concentrically inside the injector connection tube over the entire length of this tube (approximately 12 m / m). The injector is then connected to the existing pipes without modifications, the main pipe being closed on the fuel supply side and connected without modifications to the pressure regulator. A ring will be brazed (5) to provide reinforcement to the capillary tube between the tube (1) and the tube (4). Description of the operation: The gasoline coming from the tank arrives at a pressure of 2 bars by the capillary tube inside the injector while cooling it, then flows towards the pressure regulator by the annular space (passage section 6 m / m 2 ) left between the capillary tube and the injector connection tube. Interest of this device: The cooling of the injector is efficient, which allows better control fuel metering; in fact, when the engine is idling or when the injection is cut off during deceleration, the fuel temperature increases appreciably at the injection point because it no longer circulates very little inside the 'injector, which taking into account the fuel vapor pressure, causes a modification of the carburetion (leaner mixture for a determined throttle opening).
Dans tous les cas de fonctionnement du moteur, la température du carburant au point d'injection est mieux stabilisé par ce dispositif.In all cases of engine operation, the fuel temperature at the injection point is better stabilized by this device.
Remarque 1 : Le tube capillaire de diamètre intérieur 2 m/m est suffisant car le diamètre de la buse de l'injecteur ne dépasse pas 1 m/m ; à la pression de 2 bars, le débit du carburant de refroidissement est d'environ 70 litres par heure pour un moteur deNote 1: The capillary tube with an internal diameter of 2 m / m is sufficient because the diameter of the nozzle of the injector does not exceed 1 m / m; at a pressure of 2 bars, the flow rate of the cooling fuel is approximately 70 liters per hour for an engine of
4 cylindres.4 cylinders.
Remarque 2 : Ce dispositif s'adapte sur tout type d'injecteur à commande par calculateur électronique sans modifications de ces injecteurs.Note 2: This device adapts to any type of injector controlled by an electronic computer without modifications to these injectors.
Remarque 3 :Note 3:
La longueur du tube capillaire n'est pas limitative, ce qui autorise toute forme de raccordement. Remarque 4 :The length of the capillary tube is not limiting, which allows any form of connection. Note 4:
Dans le cas de pays chaud, il peut être intéressant de refroidir l'essence en utilisant le climatiseur.In the case of hot countries, it can be interesting to cool the petrol using the air conditioner.
Exemple d'application industrielle :Example of industrial application:
Moteur à essence à injection électronique. Petrol engine with electronic injection.

Claims

Revendications : Claims:
1 ) Dispositif pour refroidir les injecteurs sur moteur à injection électronique caractérisé par un tube d'arrivé d'essence (1 ) (suivant plan figure 1 ), un tube capillaire (2) reliant le tube (1 ) au tube de raccordement de l'injecteur (3) en traversant le tube existant (4) ; ce tube existant est obturé côté arrivée d'essence existante et relié sans modifications au régulateur de pression ; les injecteurs sont raccordés sans modifications au tube d'arrivée d'essence existant. 1) Device for cooling the injectors on an electronic injection engine, characterized by a fuel inlet tube (1) (according to plan in Figure 1), a capillary tube (2) connecting the tube (1) to the connection tube of the 'injector (3) passing through the existing tube (4); this existing tube is closed on the existing fuel inlet side and connected without modifications to the pressure regulator; the injectors are connected without modification to the existing fuel supply tube.
PCT/FR1994/000964 1993-08-05 1994-07-29 Device for cooling the injectors of an electronic fuel-injection engine WO1995004883A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309873A FR2708671B1 (en) 1993-08-05 1993-08-05 Injector cooling device on petrol injection engine.
FR93/09873 1993-08-05

Publications (1)

Publication Number Publication Date
WO1995004883A1 true WO1995004883A1 (en) 1995-02-16

Family

ID=9450124

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1994/000964 WO1995004883A1 (en) 1993-08-05 1994-07-29 Device for cooling the injectors of an electronic fuel-injection engine

Country Status (2)

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FR (1) FR2708671B1 (en)
WO (1) WO1995004883A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416803A1 (en) * 1974-04-06 1975-10-16 Daimler Benz Ag Electronic controlled petrol injection system - injector feed pipe has internal separating wall to assist fuel scavenging
GB2073316A (en) * 1980-03-20 1981-10-14 Bosch Gmbh Robert Fuel injection installation for preventing vapour lock
JPS60256549A (en) * 1984-06-01 1985-12-18 Hitachi Ltd Fuel injector
EP0193098A1 (en) * 1985-02-27 1986-09-03 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Fuel distribution conduit for a spark ignition engine
DE3542786A1 (en) * 1985-12-04 1987-06-11 Audi Ag Fuel distribution pipe
DE3728576A1 (en) * 1987-08-27 1989-03-09 Opel Adam Ag Fuel injection system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416803A1 (en) * 1974-04-06 1975-10-16 Daimler Benz Ag Electronic controlled petrol injection system - injector feed pipe has internal separating wall to assist fuel scavenging
GB2073316A (en) * 1980-03-20 1981-10-14 Bosch Gmbh Robert Fuel injection installation for preventing vapour lock
JPS60256549A (en) * 1984-06-01 1985-12-18 Hitachi Ltd Fuel injector
EP0193098A1 (en) * 1985-02-27 1986-09-03 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Fuel distribution conduit for a spark ignition engine
DE3542786A1 (en) * 1985-12-04 1987-06-11 Audi Ag Fuel distribution pipe
DE3728576A1 (en) * 1987-08-27 1989-03-09 Opel Adam Ag Fuel injection system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 130 (M - 478) 14 May 1986 (1986-05-14) *

Also Published As

Publication number Publication date
FR2708671B1 (en) 1996-01-19
FR2708671A1 (en) 1995-02-10

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