EP3384150A1 - Dispositif de chauffage de carburant comprenant un dispositif de chauffage - Google Patents

Dispositif de chauffage de carburant comprenant un dispositif de chauffage

Info

Publication number
EP3384150A1
EP3384150A1 EP16805371.8A EP16805371A EP3384150A1 EP 3384150 A1 EP3384150 A1 EP 3384150A1 EP 16805371 A EP16805371 A EP 16805371A EP 3384150 A1 EP3384150 A1 EP 3384150A1
Authority
EP
European Patent Office
Prior art keywords
fuel
heating device
heating
heat exchanger
electrical conductor
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Withdrawn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
EP16805371.8A
Other languages
German (de)
English (en)
Inventor
Tadeu Miguel Malago Amaral
Edson Valdomiro DE AZEVEDO JUNIOR
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.)
Mahle Metal Leve SA
Mahle International GmbH
Original Assignee
Mahle Metal Leve SA
Mahle International GmbH
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 Mahle Metal Leve SA, Mahle International GmbH filed Critical Mahle Metal Leve SA
Publication of EP3384150A1 publication Critical patent/EP3384150A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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
    • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
    • F02M31/125—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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M53/02—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/60—Fuel-injection apparatus having means for facilitating the starting of engines, e.g. with valves or fuel passages for keeping residual pressure in common rails
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/95—Fuel injection apparatus operating on particular fuels, e.g. biodiesel, ethanol, mixed fuels
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H05B1/0236—Industrial applications for vehicles
    • 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 present invention relates to a heater for a fuel heater that can be used, for example, for the cold start, better driveability, reduced greenhouse gas emissions and other applications in motor vehicles.
  • the invention also relates to a fuel injection device equipped with at least one such heater.
  • Cold-start systems equipped with at least one such fuel heater are currently used in the automotive industry, particularly in vehicles that use low volatility fuels such as ethanol, methanol, or dual-fuel technology.
  • fuels ignite comparatively poorly at low ambient temperatures, which makes it difficult in particular to start the respective internal combustion engine.
  • Corresponding problems can also occur in particular with biofuels and with fuel mixtures of fossil fuel and biofuel.
  • biofuels As is known to those skilled in the art, the proper combustion of the alcohol depends on the temperature. In the past, it was common for drivers to have difficulty running their alcohol-powered vehicles on colder days.
  • this heating technology uses a high-temperature heater for rapid heating and thus increases the risk of fuel boiling (in this case, steam is injected instead of liquid fuel causes engine damage), the overheating, an internal pressure increase in components, leaks, and in extreme cases, even fire or melting of plastic parts
  • Other fuel heating techniques for cold starting have been created, albeit in different geometrical constructions and positions than the "glow plug", for example incorporating some fuel heating techniques into the fuel nozzle. So far, all have a low heat exchange surface with the fuel and operate at high temperatures, although there are overheating and safety risks of the heater type "glow plug".
  • fuel heaters operate in conjunction with a heater control unit, that is, with electronic "hardware” that monitors the heating of each heater and shuts it off in the event of overheating, in real time within a closed loop
  • electronic "hardware” that monitors the heating of each heater and shuts it off in the event of overheating, in real time within a closed loop
  • this technology is expensive, complex to implement and requires additional time to calibrate the vehicle and adjust and program the preheating times, and it should be noted that if an electronic component of the system is damaged or their connection fails after years of use, this can lead to disaster due to the high temperatures that can reach the heaters in contact with fuel.
  • the temperature at which such a PTC element is designed and at which the PTC element decays, so that maximum reached this temperature can also be referred to as Abregeltemperatur. It should be noted that although there are other PTC type heaters, only such PTC technologies, without the use of high efficiency heat exchangers, require a PTC with a high surface temperature. In addition, there is still the need for electronic "hardware" for temperature control.
  • the heat exchangers described and illustrated therein have a format whose cross-section is substantially oblong.
  • This format is labor-intensive due to the usually used processing processes.
  • the elongated format does not allow even heat distribution. It follows that such a format is inefficient and that a better solution must be found in the current state of the art.
  • the object of the invention to provide a fuel heater that allows for easier heat exchange.
  • the fuel heater is generally intended to allow efficient heating of the respective fuel.
  • the Fuel heater can allow evaporation of the respective Krafstoffs. The latter applies in particular to biofuels.
  • Another object of the present invention is to provide a fuel heater that allows uniform heating of the fuel that comes in contact with outer walls of the fuel heater.
  • the fuel heater comprising: a fuel inlet and at least one fuel outlet, the heater having at least one interior space disposed between the fuel inlet and fuel outlet, wherein at least one heat exchanger is disposed in the interior space and wherein the heat exchanger has at least a first and a second heating element, which are inserted into an opening in the interior of the heat exchanger; the heat exchanger further comprises a first electrical conductor in its opening in electrical contact with the first heating element and a second electrical conductor in electrical contact with the outer surface of the heat exchanger.
  • the heat exchanger has a round, in particular circular, cross-section.
  • this fuel heater has the following additional features and / or properties with optional use:
  • the first electrical conductor is a conductive spring comprising a contact portion which makes contact with the heating elements, and an electrical contact end which makes contact with an electrical circuit of a motor vehicle, when the contact portion and the contact end are fully installed; and or
  • the contact portion of the first electrical conductor has a curved format; and or -
  • the contact portion consists of two curved, opposite side parts, which are at a distance from each other; and or
  • the first heating element is located along the one side part of the contact portion of the first electrical conductor and the second heating element is located along the other side part of the contact portion of the first electrical conductor;
  • the first and second heating element are on both side parts of the contact portion of the first electrical conductor by means of an electrically non-conductive, that is electrically insulating holder, e.g. polymeric material, said holder having front and rear support walls for securing the heating elements such that they are easy to remove, and central receptacles for receiving and positioning each side portion of the contact portion of the first electrical conductor; and or
  • the contact portion of the first electrical conductor, the heating elements and the support radially form a "sandwich" structure, and / or
  • the fuel heater additionally comprises at least one thermally conductive foil around the "sandwich” structure, and / or
  • the heating elements are thermistors, in particular PTC thermistors; and or
  • the heat exchanger comprises a grooved portion having a plurality of grooves on its outer surface
  • At least one radial recess may be located on at least a portion of the outer surface of the heat exchanger, which extends in particular axially; and or
  • the holder has a cylindrical shape, with their recordings are arranged in a circular arc and concentric; and or
  • the first and second heating element and at least one optionally existing thermally conductive foil have a, in particular circular arc-shaped, arched format; and or -
  • the fuel heater comprises at least one deflector disposed in the fuel inlet, the function of which is to redirect the incoming fuel flow in the lower region of the interior of the heater; and or
  • the deflector can engage radially in the above-mentioned recess; and or
  • the heat exchanger comprises an upper and continuous sealing portion along the ribbed portion, the function of said sealing portion being to receive at least one sealing element;
  • the interior consists of a container and a fastening and sealing nozzle, wherein the container configured for receiving the ribbed portion of the heat exchanger and the fastening and sealing nozzle for receiving the sealing portion of the heat exchanger is set; and or
  • the sealing element is a sealing ring of the "O-ring" type, and / or
  • a protective cover which holds the first, the second and an optionally provided third electrical conductor;
  • this plastic cover can be molded onto the protective cover;
  • the fuel heater also includes a mounting clamp, which is inserted into the through holes of the mounting nozzle and placed around the plastic cover portion, which is located inside the mounting and sealing nozzle.
  • the said clamp also still includes free, expanded, ie, away from each other or outwardly facing ends; and or
  • the fuel inlet of the heater may be fluidly connected to the fuel outlet of a fuel line and the Fuel outlet of the heater can be directly connected to at least one fuel injector; and or
  • the fuel heater can be fully installed in the fuel line; and or
  • the first heating element and the second heating element have the same behavior and the same Abregeltemperatur; and or
  • the first heating element and the second heating element have different behaviors and Abregeltemperaturen; and or
  • a third electrical conductor is present, the second electrical conductor is in electrical contact with the second heating element and has a curved format;
  • the third electrical conductor is a conductive spring comprising a contact portion which makes contact with the heating elements and an electrical contact end which makes contact with an electric circuit of a motor vehicle when the contact portion and the contact end are completely installed; and or
  • the first heating element is located along a side part of the contact portion of the first electrical conductor and the second heating element is located along a side part of the contact portion of the third electrical conductor;
  • the first and second heating elements are connected to each side portion of the contact portion of the first and third electrical conductors by means of an electrically insulated support, e.g. polymeric material, said holder having a front and rear support wall for positioning and / or fixing the heating elements such that they are easy to remove, and in particular concentric seats for receiving the first and third electrical conductors and to position; and or
  • Fig. 1 shows a view of the fuel heater of the present invention connected to a fuel line and to fuel injectors according to a first mounting option
  • Fig. 2 is a view of the fuel heater of the present invention connected to a fuel pipe;
  • Fig. 3 is a view of the fuel heater of the present invention connected to a fuel line and to fuel injectors according to a second mounting option;
  • Fig. 4A is a detail view and a sectional view of the fuel heater of the present invention according to a first specific embodiment
  • Fig. 4B is a sectional view of the fuel heater of the present invention according to a first specific embodiment
  • Fig. 5 is an exploded view of the components of the heater of the present invention according to a first specific embodiment
  • Fig. 6 is a view of the heat exchanger of the fuel heater according to a first embodiment of the invention
  • Fig. 7 is a view of the electric conductor of the fuel heater according to a first embodiment of the present invention.
  • Fig. 8 is a view of the holder of the fuel heater according to a first embodiment of the present invention.
  • FIG. 9 shows a side view of the portion of the fuel heater according to a first embodiment of the present invention, wherein the heater is connected to a fuel line and a fuel injector in a second mounting facility (as also shown in FIG. 3);
  • Fig. 10 is a side view of the portion of the fuel heater of the present invention according to a first embodiment, wherein the heater is connected to a fuel pipe;
  • Fig. 1 shows a side view of the portion of the fuel heater of the present invention according to a first embodiment, wherein the heater is connected to a fuel line and the internal components of the heater (except for a deflector) have been removed for better visibility;
  • Fig. 12 is a sectional view of the fuel heater according to a first embodiment of the invention, wherein the illustrated heater comprises a deflector;
  • Fig. 13 shows a side view of the portion of the fuel heater according to a first embodiment of the invention, wherein the heater is connected to an injector and a fuel line, according to a first mounting option (as shown in Figures 1 and 2);
  • Fig. 14 shows a side view of the portion of the fuel heater of the present invention according to a first embodiment of the invention, wherein the heater is connected to a fuel line.
  • the first mounting option is used (as shown in Figures 1, 2 and 13);
  • Fig. 15 shows a side view of the portion of the fuel heater according to a first embodiment of the present invention, wherein the heater is connected to a fuel line and the internal components of the heater (with the exception of the deflector) have been removed for better visibility.
  • the first mounting option is used (as shown in Figures 1, 2, 13 and 14);
  • Fig. 16 is a sectional view of the fuel heater according to a first embodiment of the present invention, wherein the heater is connected to a fuel line.
  • the first mounting option is used (as shown in Figures 1, 2, 13, 14 and 15);
  • Fig. 17 is a plan view of the heater without the components inserted;
  • Fig. 18 is a detail view and a sectional view of the fuel heater of the present invention according to a second specific embodiment;
  • Fig. 19 is a sectional view of the fuel heater of the present invention according to a second specific embodiment.
  • Fig. 20 is an exploded view of the components of the heater of the present invention according to a second specific embodiment.
  • the heater 5 of the present invention may be connected to a fuel pipe 2, as shown in FIGS. 1, 2 and 3. From Figures 1, 2, 3, 1 1, 12, 15 and 16 it is apparent that the Fuel line 2 is provided with a fuel inlet 3 and with a fuel outlet not specified here. As a rule, the fuel line 2 has a plurality of fuel outlets for a plurality of heating devices 5. Each heater 5 also has a fuel inlet 6 and a fuel outlet 7. It is also worth noting that the fuel inlet 6 of the heater 5 is fluidly connected to the fuel outlet of the fuel line 2. Consequently, the fuel outlet of the fuel pipe 2 can be reacted so as to coincide with the fuel inlet 6 of the heater 5.
  • the heating device 5 with its fuel inlet 6 can be inserted directly into the associated fuel outlet of the fuel line 2. This can be seen most clearly in Figures 1 1, 12, 15 and 16.
  • the fuel outlet 7 of the heating device 5 can be connected to a fuel injector 8, as shown in FIGS. 9 and 13.
  • the respective fuel injector 8 can be inserted directly into the associated fuel outlet 7.
  • FIGS. 11, 12, 15 and 16 show a heating device 5 which has an interior 9 which is arranged between its inlet 6 and its fuel outlet 7.
  • this invention has a heat exchanger 10 installed in the interior 9 of the heater 5.
  • the heat exchanger 10 has a ribbed portion 20 having a plurality of ribs on its outer side surface or outer surface, as well as one With respect to these two portions 20 and 24 of the heat exchanger 10, the inner space 9 is adapted to receive these components or portions 20, 24 in its interior while being in contact therewith Purpose with a container 25 and a mounting and sealing nozzle 26 is provided.
  • the container 25 is configured to receive or condition the corrugated portion 20 while the three attachment and sealing nozzles 26 are configured to receive the sealing portion 24 of the heat exchanger 10.
  • the heat exchanger 10 has a substantially circular cross section, as illustrated in Figure 6, having a recess 21 on the outer surface of the corrugated portion 20 on at least part of its outer surface. Furthermore, the heat exchanger 10 is preferably made of metallic material. However, other heat and electricity conducting materials are not excluded which are as effective or better than metals and which may possibly be used.
  • the heat exchanger 10 is also equipped with at least two heating elements 1 1A and 1 1 B, which are inserted into an opening formed in the interior of the heat exchanger 10, as shown in Figures 4A, 4B, 18 and 19 can be seen ,
  • These heating elements 1 1A and 1 1 B are preferably a thermistor of the type PTC (positive temperature coefficient).
  • the heating elements 1 1A and 1 1 B may have the same behavior and the same heating temperature or different behaviors and / or heating temperatures.
  • the heating temperature is the control temperature of the PTC element, ie the temperature to which heats the PTC element and from the PTC element no electrical More power consumes.
  • the heater 5 has a first curved electrical conductor 12A, as illustrated in FIG. 5, for example.
  • the heating device 5 of this invention still has a third electrical conductor 12B, which also has a curved format, as illustrated in Figures 18 to 20.
  • the electrical conductor 12A and / or 12B are respectively in electrical contact with the first and second heating elements 11A and 11B.
  • the first electrical conductor 12A and the third electrical conductor 12B a conductive spring, which is shown for example in Figures 5, 7 and 20.
  • This spring consists of a contact portion 14 which abfast the heating elements 1 1 A and 1 1 B, and from an electrical contact end 15 which is completely installed in the contact portion 14.
  • the contact portion 14 consists of two curved, opposite side parts (or portions), which are at a distance from each other.
  • the contact portion 14 of the respective electrical conductors 12A and 12B consists of a single side portion (or a single portion).
  • the heat exchanger 10 further includes a second electrical conductor 13 in electrical contact with its outer surface.
  • This second electrical conductor 13 may be secured to the heat exchanger 10 by any means, such as welds or screws.
  • the second electrical conductor 13 to the heat exchanger 10 by means of a Screwed down screw 22.
  • the electrical conductors 12A, 13 and 12B are electrically connected to a circuit as illustrated in the embodiment shown in Figures 4A, 4B and 5 and the embodiment illustrated in Figures 18 to 20.
  • the first conductor 12A and the third conductor 12B contact is made through the end 15 of each conductor.
  • the circuit in question is an already existing circuit in the engine control of the vehicle.
  • FIGS. 5, 7 and 20 it can be seen from FIGS. 5, 7 and 20 that the contact section 14 and the electrical contact end 15 have been produced from a single part.
  • the first heating element 11A and the second heating element 11B are located along a side portion of a contact portion 14 of the first electrical conductor 12A and the third electrical conductor 12B.
  • the first heating element 1 1A is located along the one side portion of the contact portion 14 of the first electrical conductor 12A and the second heating element 11B is along the other side portion of the contact portion 14 of the first electrical conductor 12A.
  • a radially "sandwich" structure is formed in each case.
  • the heating elements 1 1A and 1 1B have a substantially curved shape, as can be seen for example from FIG. This curvature can be circular in particular.
  • Bracket 17 is still provided, as illustrated in Figures 5, 8, and 20. More specifically, the two heating elements 1 1A and 1 1 B are provided by means of said holder 17, which is made of polymer material, by the way Bracket 17 further includes front and rear support portions 18 for securing and positioning the heating elements 11A and 11B so that they are easy to remove.
  • the holder 17 has seats 19 arranged concentrically with respect to the longitudinal center axis in order to receive and position the first electrical conductor 12A and the third electrical conductor 12B (in the case of the embodiment illustrated in FIGS. 18 to 20).
  • the bracket 17 may have various shapes. In FIGS.
  • the holder 17 has, for example, flat support regions 18 and concentric receptacles 19 on a surface which, like the heat exchanger 10, may be formed, eg may have an elongated or elliptical shape, if this corresponds to the cross section of the heat exchanger 10.
  • the holder 17 has a circular cross-section and the concentric receptacles 19 are circular arc-shaped.
  • one or more thermally conductive sheets 16 may alternatively be provided.
  • the thermally conductive sheets 16 are placed around the "sandwich" structure composed of the heating elements 11A and 11B, the contact portions 14 of the first electrical conductor 12A (also from the third conductor 12B in the case of the embodiment of Figures 18 to 20) and the support 17.
  • the film 16 has such a shape as to allow the support 17 with the first conductor 12A and the built-in
  • the foil 16 also wraps the support 17 with the first and third electrical conductors 12A and 12B and with the built-in elements 1AA and 11B.
  • the heat-conductive foils 16 a arched shape so that they can wrap the elements that form the equally curved "sandwich" structure.
  • the seal portion 24 of the heat exchanger 10 is formed so as to be able to accommodate at least one seal member 27.
  • the sealing element 27 in question is an "O-ring" type sealing ring incorporated in the sealing portion 27 of the heat exchanger 10 and shown in Figs. 4A, 4B, 5, 9, 10, 13, 14 18, 19 and 20.
  • a protective cover 28 which holds the electrical conductors 12A, 12B and 13 in any embodiment of the present invention More specifically, the protective cover 28 is fastened over all the electrical conductors 12A, 12B and 13, the attachment being able to take place, for example, by means of bores on the protective cover 28.
  • the protective cover 28 is fastened over all the electrical conductors 12A, 12B and 13, the attachment being able to take place, for example, by means of bores on the protective cover 28.
  • the heater 5 is supplied with a bow-shaped attachment clip 30 for each heater 5.
  • This clamp 30 is inserted into passage openings 31 which are formed on the fastening and sealing connection 26.
  • the clamp 30 lies around the plastic cover portion 29, which is located inside the mounting and sealing nozzle 26.
  • Said terminal 30 additionally has free ends 32, which secure attachment enable.
  • the ends 32 can be bent outwards, ie away from one another, so that they can interact with an opening edge of the respective opening 31.
  • the heating device 5 may optionally have a deflector 23, as shown in FIGS. 9 to 12.
  • This deflector 23 is attached to the fuel inlet 6 (in the area shown in FIG. 17) and serves to deflect the incoming fuel flow into the lower region of the interior 9 of the heating device 5.
  • the deflector 23 effects the most uniform possible distribution of the incoming fuel to the entire Axial height of the ribbed portion 20.
  • the deflector 23 expediently engages in the aforementioned recess 21, which is formed on the outside of the heat exchanger 10.
  • the heater 5 and the conduit 2 are completely installed. In other words, these two components can form a single part.
  • the heater 5 and the conduit 2 are made by molding and injecting polymer materials. After assembly, inside the interior 9, the heat exchanger 10 (and all other components located in its interior), the deflector 23 (optional), the sealing element 27 and the protective cover 28 onto which the plastic cover 29 is subsequently injected, appropriate.
  • the fuel inlet 6 and the fuel outlet 7 of the heater 5 may be arranged to form an angle (with respect to each other) varying, for example, between 0 ° and 90 °.
  • Figures 9 to 12 show that this angle is substantially 0 °, so that the fuel inlet 6 and fuel outlet 7 are diametrically opposed.
  • this angle is less than 90 °, and in FIG. 4 the angle is substantially 90 °.
  • the angle between the fuel inlet 6 and the fuel outlet 7 of the heater 5 may vary depending on the engine configuration, the available space and the application, etc., so that the figures represent only one example of the various possible arrangements.
  • the heater 5 of the present invention is fully installed, thus being a single part requiring no “clamps” and sealing rings to secure the heaters 5 and the fuel line 2.
  • the strong sealing and fixing of the parts which, thanks to the injection of the plastic cover 29 and the function of the protective cover 28, fasten all the components, including the terminal 30, which aids in fixing, should be emphasized.
  • the heater 5 has at least three electrical conductors 12A, 12B and 13 provides a number of advantages.
  • two heating elements 11A and 11B can be activated in one go, thus increasing the heat given off to the fuel, or it can be selected if only one heating element is used. If the vehicle requires a rapid heating of the fuel, thus the first and the second heating element 1 1 A and 1 1 B are activated. If the vehicle requires only slightly heated fuel, only one of the heating elements 1 1 A or 1 1 B is activated.
  • the control over the heat supplied to the fuel is increased with the possibility that the heating elements 1 1A and 1 1 B may have different behaviors and heating temperatures.
  • the ability to activate one or the other heating element, or even both at the same time, thereby provides flexibility to the vehicle's cold start system, thereby increasing the ability to deliver a better product to the consumer.
  • the engine control of the vehicle can be adjusted to supply the heating elements 1 1A, 1 1 B at temporally different intervals.
  • a short period for preheating the fuel may be set so that both heaters 1 1A and 1 1 B are simultaneously activated in the first few seconds before starting the vehicle.
  • the driver does not need to wait long to drive his vehicle since the fuel is already at the ideal temperature when the starting system is activated.
  • Another advantage and control of the present invention relates to the fact that the motor control can be adjusted with on-off control strategies or even uses pulse width modulation (PWM).
  • PWM pulse width modulation
  • the fuel heater 5 provides a versatile solution that offers numerous opportunities to control the heat supplied to the fuel. Due to the fact that the invention different types of control and strategies, the present invention can provide means for the fuel to always have the ideal temperature for cold start and vehicle use.
  • the cross section of the heat exchanger 10 has a round shape, preferably a substantially circular shape, increases the contact area between the heating elements 1 1A and 1 1 B and the internal portion of the heat exchanger 10. Further, a part having a make round cross-section easier and also facilitates the execution of the grooves or ribs. The ease of obtaining this part reduces process errors and optimizes manufacturing costs.
  • the heating elements 1 1A and 1 1 B can be arranged in positions with a greater distance from each other with respect to the heat exchanger 10 with an elongated shape. Thus, the heat generated by the heating elements 1 1A and 1 1 B is almost entirely directed to the heat exchanger 10.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

L'invention concerne un dispositif de chauffage de carburant qui peut être utilisé par exemple pour le démarrage à froid dans des véhicules automobiles. Le dispositif de chauffage de carburant (5) est constitué : d'un orifice d'entrée de carburant (6) et d'au moins un orifice de sortie de carburant (7). En outre, le dispositif de chauffage de carburant (5) comprend au moins un espace intérieur (9), qui est monté entre son orifice d'entrée de carburant (6) et l'orifice de sortie de carburant (7). Dans ledit espace intérieur (9) est monté au moins un échangeur de chaleur (10), l'échangeur de chaleur (10) disposant d'au moins un premier et un deuxième élément de chauffage (11A, 11 B) qui sont insérés dans une ouverture à l'intérieur dudit échangeur. L'échangeur de chaleur (10) est constitué de plus dans son ouverture d'un premier conducteur électrique (12A), qui est en contact électrique avec le premier élément de chauffage (11A), et d'un deuxième conducteur électrique (13), qui est en contact électrique avec la surface extérieure de l'échangeur de chaleur (10). L'échangeur de chaleur (10) possède de plus une section transversale circulaire.
EP16805371.8A 2015-11-30 2016-11-29 Dispositif de chauffage de carburant comprenant un dispositif de chauffage Withdrawn EP3384150A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102015030039A BR102015030039A2 (pt) 2015-11-30 2015-11-30 dispositivo de aquecimento de combustível
PCT/EP2016/079166 WO2017093269A1 (fr) 2015-11-30 2016-11-29 Dispositif de chauffage de carburant comprenant un dispositif de chauffage

Publications (1)

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EP3384150A1 true EP3384150A1 (fr) 2018-10-10

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EP16805371.8A Withdrawn EP3384150A1 (fr) 2015-11-30 2016-11-29 Dispositif de chauffage de carburant comprenant un dispositif de chauffage

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US (1) US20180355828A1 (fr)
EP (1) EP3384150A1 (fr)
BR (1) BR102015030039A2 (fr)
WO (1) WO2017093269A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR102016018530A8 (pt) 2016-08-12 2018-06-26 Mahle Int Gmbh conjunto aquecedor de combustível e sistema de alimentação e aquecimento de combustível
BR102016029084A2 (pt) 2016-12-12 2018-07-17 Mahle Metal Leve S.A. sistema de aquecimento de combustível
BR102017004261A2 (pt) 2017-03-03 2018-10-30 Mahle Int Gmbh processo de fabricação de um conjunto de distribuição e aquecimento de combustível e conjunto de distribuição e aquecimento de combustível
BR102021008389A2 (pt) * 2021-04-30 2022-11-16 Robert Bosch Limitada Dispositivo para aquecimento de combustível e conjunto para injeção de combustível
WO2023115187A1 (fr) * 2021-12-21 2023-06-29 Robert Bosch Limitada Bougie de préchauffage avec filament exposé pourvue d'un insert et agencement de montage la comprenant

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US2108809A (en) * 1934-06-26 1938-02-22 Du Pont Moistureproof material and method of making the same
US5401935A (en) * 1993-05-28 1995-03-28 Heaters Engineering, Inc. Fuel heating assembly
JP2000120504A (ja) * 1998-10-13 2000-04-25 Nippon Soken Inc 筒内直噴式内燃機関の燃料供給系
JP2005538311A (ja) * 2002-09-11 2005-12-15 ベイポレイト・プロプライエタリー・リミテッド 燃料供給システム
US8047182B2 (en) * 2008-02-13 2011-11-01 Millenium Industries Fuel delivery system for heating fuel therein
ITTO20080271A1 (it) * 2008-04-08 2009-10-09 Eltek Spa "dispositivo di riscaldamento per condotti di alimentazione del combustibile, condotto di alimentazione del combustibile e motore a combustione"
US7766254B2 (en) * 2008-05-30 2010-08-03 Delphi Technologies, Inc. Heated fuel injector
DE102011086201A1 (de) 2011-11-11 2013-05-16 Mahle International Gmbh Kraftstoffeinspritzanlage und Vorheizeinrichtung
DE102012220432A1 (de) * 2012-11-09 2014-05-15 Mahle International Gmbh Vorheizeinrichtung für eine Kraftstoffeinspritzanlage
DE102012220429A1 (de) 2012-11-09 2014-05-15 Mahle International Gmbh Vorheizeinrichtung für eine Kraftstoffeinspritzanlage

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US20180355828A1 (en) 2018-12-13
BR102015030039A2 (pt) 2017-06-06
WO2017093269A1 (fr) 2017-06-08

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