EP2435682B1 - Carburateur commandé électriquement - Google Patents

Carburateur commandé électriquement Download PDF

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Publication number
EP2435682B1
EP2435682B1 EP10744862A EP10744862A EP2435682B1 EP 2435682 B1 EP2435682 B1 EP 2435682B1 EP 10744862 A EP10744862 A EP 10744862A EP 10744862 A EP10744862 A EP 10744862A EP 2435682 B1 EP2435682 B1 EP 2435682B1
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EP
European Patent Office
Prior art keywords
fuel
tesla
pumping
unit
carburettor
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.)
Not-in-force
Application number
EP10744862A
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German (de)
English (en)
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EP2435682A1 (fr
Inventor
Christian Kellermann
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Makita Corp
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Makita Corp
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Publication date
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Publication of EP2435682A1 publication Critical patent/EP2435682A1/fr
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Publication of EP2435682B1 publication Critical patent/EP2435682B1/fr
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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D3/00—Controlling low-pressure fuel injection, i.e. where the fuel-air mixture containing fuel thus injected will be substantially compressed by the compression stroke of the engine, by means other than controlling only an injection pump
    • F02D3/04—Controlling fuel-injection and carburation, e.g. of alternative systems
    • 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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/38—Controlling of carburettors, not otherwise provided for
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/046—Arrangements for driving diaphragm-type pumps
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/12—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
    • F02M59/14—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary of elastic-wall type
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
    • 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
    • F02M71/00—Combinations of carburettors and low-pressure fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio

Definitions

  • the present invention relates to an electrically controlled carburetor for gasoline engines with a venturi for sucking fuel from a fuel line opening into the air duct, which is connected to a fuel chamber and between the fuel chamber and the mouth in the venturi a fuel nozzle for adjusting a due to negative pressure in the venturi comprising fuel quantity sucked from the fuel chamber.
  • Such a carburetor is for example from the DE 102 16 084 A1 known.
  • This task tries the DE 102 16 084 A1 to be solved in that the fuel nozzle is provided with a variable flow cross-section.
  • a piezoelectric actuator is proposed. Because of a short travel of such piezoelectric actuators, however, a translation element is needed, which makes the construction of such a carburetor consuming. In addition, the use of a translation element leads to a higher degree of inaccuracy and higher susceptibility.
  • the DE 102 42 816 A1 describes an electromagnetic valve in which flow channels are fluidly separated by current flow in a coil from one another by an anchor plate. With the anchor plate as the only moving part only small forces for opening and closing the valve are necessary.
  • the object of the present invention is to provide a flexibly adaptable carburettor for gasoline engines, in particular for engine working devices, which overcomes the above-mentioned drawbacks of the prior art and has a simple, robust construction which allows constant long-term behavior.
  • the invention includes the technical teaching that at least two Tesla diodes are inserted in series with the fuel nozzle, between which a chamber (hereinafter referred to as "pumping chamber”) is located with a pump unit.
  • the invention takes advantage of the property of Tesla diodes to have a higher flow resistance in a direction hereinafter referred to as the "reverse direction” than a direction opposite to the reverse direction, hereinafter referred to as the "forward direction”.
  • the ratio of the pressure loss in both directions is expressed by the so-called “diodicity”, which is a dimensionless number. Because of this asymmetric property, such a component is also referred to as a fluidic diode analogous to the diodes in electrical engineering.
  • the asymmetry of the flow resistance of a Tesla diode results from a loop-like arrangement of flow channels, wherein in the forward direction a liquid flowing through the Tesla diode fluid flows predominantly through straight channels, in the reverse direction, however, at least one curved channel must be traversed, whereby the flow resistance is increased.
  • a backwater arises in at least one area in which a curved and a straight channel coincide, a backwater, which in turn increases the flow resistance in the reverse direction.
  • a first Tesla diode Seen from the pumping chamber, a first Tesla diode is connected in the reverse direction, a second Tesla diode in the forward direction. Because of the lower flow resistance in the second Tesla diode, fluid from the chamber flows either completely or at least for the most part through the second Tesla diode.
  • the pump unit moves in a pumping process in the opposite direction, so that a negative pressure arises in the chamber, fluid is sucked from the fuel line. Since the first Tesla diode in the forward direction is now present with regard to flowing into the pumping chamber, fuel flows either completely or at least for the most part through the first Tesla diode.
  • a simply constructed pumping device is achieved.
  • This acts as a regulating unit, which efficiently and flexibly adapts the flow of fuel in the fuel line from the fuel nozzle to the mouth in the air funnel.
  • a flexibly adaptable carburetor is achieved, which can respond to external influences, such as tilting or pivoting of an engine working device, or internal influences, such as the lambda value in the exhaust gas, quickly and at the same time simple design.
  • Tesla diodes Since there are neither mechanically movable nor electrical components in the Tesla diodes, they have an extremely low susceptibility. They have no wearing parts and therefore retain a constant long-term behavior without wear. In addition, since there are no moving parts in the Tesla diodes, they have no leakage problems. If, in addition, a simply constructed pumping unit is used, the entire regulating unit and thus the erfindungsgemäBe carburetor high robustness and low susceptibility while maintaining constant long-term behavior. In addition, due to the lack of an opening threshold, a Tesla diode can be easily operated in the kHz range.
  • the Tesla diodes are introduced in the direction of flow from the fuel nozzle to the venturi in the reverse direction.
  • the regulating unit pumps in the opposite direction to the fuel flow from the fuel nozzle to the mouth in the air funnel and thus has the function of a throttle unit. If the regulating unit fails, more fuel in the fuel line is delivered to the venturi than during operation of the regulating unit, i. the fuel-air mixture that is produced in the carburetor then gets fatter. Therefore, it is advantageous to adjust the fuel nozzle so that would be generated without the regulator in the vent a too rich fuel-air mixture.
  • the regulating unit empties the mixture to the desired mixing ratio. In case of failure of the regulating unit, the fuel-air mixture is then too fat instead of too lean, which does not damage the engine.
  • the two Tesla diodes are arranged in the forward direction, thus supporting in operation the flow from the fuel nozzle to the mouth.
  • the pumping unit is a membrane element.
  • This has a membrane which forms a portion of an inner wall of the pumping chamber. Periodic movement of the membrane periodically generates a volume change in the pumping chamber and thus periodically a pressure change in the pumping chamber.
  • the membrane is moved, for example, electromechanically or via a piezoelectric element.
  • Such membrane elements are robust elements that have low susceptibility and long life. Because of the very low weight of the membrane, it can be moved at very high frequencies.
  • the piston takes over the task to reduce the volume in the pumping chamber periodically or increase.
  • the pump unit is controlled in a voltage-modulated manner. This has the advantage that you can work with digital signals.
  • the modulation allows a stepless adjustment of the pump unit and thus a stepless regulation of the fuel flow in the fuel line.
  • the pump unit is controlled in pulse width modulation. This modulation is particularly easy to handle, with a simple control to effect a stepless adjustment of the pumping unit.
  • the pump unit may be regulated by a control which evaluates measured values of an exhaust gas lambda probe.
  • the generated exhaust gas mixture is analyzed by a sensor and leads via the control to an adjustment correction for the amount of fuel to be supplied to the air funnel.
  • a number of other measured values can be supplied to the control, which activates the pump unit and thus adjusts the amount of fuel to be supplied to the air funnel.
  • the Tesla diodes with gasoline fuel have a Diodiztician between 1.1 and 3, in particular between 1.3 and 2.
  • the diodes of the Tesla diodes can be influenced as desired or required by the geometric design of the Tesla diodes in their manufacture.
  • radii of curvature, angles and cross-sectional areas of the tracks of a Tesla diode are suitable for influencing the diodesicity.
  • the geometric design of the Tesla diodes is advantageously suitable to adjust the delivery characteristic of the regulating device targeted.
  • the Tesla diodes are designed accordingly or appropriate Tesla diodes are used for the regulating unit.
  • Tesla diodes are designed so that the Reynolds number in the Tesla diodes is well below the critical Reynolds number of 2300.
  • “Clear” here is a Reynolds number of less than 2000, in particular less than 1200, preferably less than 500 to understand. This has the advantage that the fuel flows through the Tesla diodes with a laminar flow. This results in a good-natured behavior of the Tesla diodes, where "good-natured” is understood to mean a continuous property profile which does not show abrupt changes in the flow resistance of the Tesla diodes as a function of the flow velocity. This supports a stepless regulation of the fuel flow.
  • the advantageous Reynolds numbers can be achieved preferably by a small size of the Tesla diodes, with an advantageous cross section of the channels in the Tesla diode between 0.05 mm 2 and 1 mm 2 , in particular between 0.1 mm 2 and 0.5 mm 2 ,
  • the chamber and / or the Tesla diodes are formed as a depression of a plate.
  • This plate may for example be a metal plate.
  • Tesla diodes by embossing by means of micro-embossing dies. This method allows a precise and cost-effective production.
  • a cover-like completion of the chamber and / or the Tesla diodes is advantageously formed by a further plate which closes cavities of the chamber and / or the Tesla diodes from above.
  • This construction of two plates has the advantage that already by two easy to manufacture plates, a substantial part of the regulating unit is present. Two plates can be easily integrated into a conventional carburettor housing. Thus, the present invention also has the advantage that existing manufacturing processes for conventional carburetor only need to be changed slightly or even existing carburetor can be retrofitted.
  • the carburettor has a fuel line 2, which extends from a fuel chamber (not shown) via a fuel nozzle 3 to a venturi 4, where it exits at an orifice 5.
  • a first Tesla diode 6 and a second Tesla diode 7 are introduced in the fuel line 2. Both Tesla diodes 6, 7 are arranged in the reverse direction in this embodiment, which is in Fig. 1 represented by the corresponding orientation of the switching symbol.
  • a below called “pumping chamber” chamber 8 is arranged, which is in fluid communication with the Tesla diodes 6, 7 via the fuel line 2.
  • a membrane element 9 as a pump unit, which has a membrane 10 which is movable via an actuating element 11.
  • actuating element 11 is a piezoelectric element in this embodiment.
  • the membrane 10 may be electromagnetically driven.
  • the tesla diodes 6, 7, the pumping chamber 8 and the pumping unit 9 together form a regulating unit 30.
  • an overpressure and underpressure are periodically generated in the pumping chamber by an up and down movement (represented by a double arrow 12).
  • the dashed line represents the diaphragm 10 in the presence of a negative pressure, the solid line in the presence of an overpressure.
  • the periodic volume change in conjunction with the diodes of the Tesla diodes 6, 7 to a pumping action of the regulating unit 30. This pumping action is opposed to the flow 31 in the fuel line 2, whereby the regulating unit 30 acts as a throttle unit in this embodiment.
  • the diodeicity of both Tesla diodes is 1.5.
  • the membrane element 9 is operated in a pulse-width-modulated manner, so that a change in the pumping action of the membrane element 9 is possible simply and effectively using a digital control.
  • the oscillation frequency of the diaphragm 10 can be changed by changing an applied voltage frequency.
  • Fig. 2 shows a representation of the first Tesla diode 6.
  • a first recess 19 can be seen, with the fuel line from the fuel nozzle comes, is connected (not shown).
  • the pumping chamber 8 can be seen, which lies in the reverse direction behind the Tesla diode 6.
  • the fuel line 2 between the first recess 19 and the Tesla diode 6 and between the Tesla diode 6 and the pumping chamber 8 is in this embodiment directly in the tracks 20, 21 of the Tesla diode over.
  • the curved track 20 and the straight track 21 are formed and open into each other so that when flow of the Tesla diode 6 in the reverse direction (in the drawing from left to right) due to the geometric conditions and the resulting flow conditions, a high flow resistance results.
  • the first recess 19, pump chamber 8, fuel line 2 and curved track 20, and straight track 21 of the throttle unit 30 are introduced into a metal plate by embossing by means of a micro-embossing die.
  • the width of the webs 20, 21 is about 600 microns.
  • the first recess 19, pumping chamber 8, fuel line 2 and curved, and first and second Tesla diode 6, 7 of the regulating unit 30 are introduced into a first metal plate 22 by spark erosion.
  • the diameter of the pumping chamber 8 is in this case about 3 mm, the dimensions of the other elements of the regulating unit 30 behave with respect to the pumping chamber 8 approximately as in the Fig. 3 shown.
  • the first and second Tesla diodes 6, 7 are formed substantially parallel to each other. They are connected to each other via the pumping chamber 8. This results in a U-shaped course, which has a space-saving design of the regulating unit 30 result.
  • a first recess 19 is inserted into the metal plate, at a free end of the second Tesla diode 7, a second recess 23 is introduced, which penetrates the first metal plate 22.
  • a second metal plate 24 which forms a cover of the tracks 20, 21 of the Tesla diodes 6, 7 and the fuel line 2.
  • a hole 25 is inserted, which forms a connection to the first recess 19 of the first metal plate 22.
  • the regulating unit 30 is externally connected to a Fuel line 2 connected.
  • the second metal plate 24 further has an opening 26 which extends the pumping chamber 8 upwards.
  • the membrane element 9 is used, wherein the membrane element 9 in this embodiment has an electrical connector 27, via which the membrane element 9 is easily and reversibly connected to a corresponding mating connector, for example, to a high frequency source.
  • the second recess 23 is connected via the fuel line 2 to the mouth 5 in the venturi 4 (see correspondingly Fig. 1 ).
  • Fig. 5 shows a perspective view of a third embodiment in which the regulating unit 30 of the second embodiment ( 3 and 4 ) is integrated in a conventional housing 28 of a carburetor 1. Except for a slight increase in the thickness of the carburetor 1 through the first metal plate 22 and the second metal plate 24, only the pump element 9, which in this embodiment is a piston element, can be seen from the outside. Otherwise, the same supply lines and connections as in a conventional carburetor can be seen, which need not be described here in detail.
  • the design and arrangement of the Tesla diodes can be varied over a wide range.
  • a plurality of Tesla diodes can be arranged in series or in parallel to cause some effects on desired delivery characteristics of the regulating unit.
  • a plurality of curved tracks in a Tesla diode can be arranged one behind the other.
  • the throttle unit cause the leaning of the fuel-air mixture in normal operation, whereas the Anfettisme, for example, as a choke temporarily performs a targeted enrichment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (12)

  1. Carburateur (1) à commande électrique pour moteurs à combustion interne, comportant un diffuseur d'air (4), pour aspirer du carburant dans une conduite de carburant (2) débouchant dans le diffuseur d'air (4), raccordée à une chambre à carburant et présentant, entre la chambre à carburant et l'embouchure (5) vers le diffuseur d'air (4), une buse à carburant (3) pour régler une quantité de carburant pouvant être aspirée dans la chambre à carburant suite à une dépression dans le diffuseur d'air (4), caractérisé en ce qu'il est prévu, en branchement en série avec la buse à carburant (3), au moins deux diodes de Tesla (6, 7) entre lesquelles se trouve une chambre de pompage (8) contenant une unité de pompage (9).
  2. Carburateur selon la revendication 1, caractérisé en ce que les diodes de Tesla (6, 7) sont installées dans le parcours allant de la buse à carburant (3) jusqu'au diffuseur d'air (4) dans le sens de blocage, de sorte qu'une unité de régulation (30) comprenant les diodes de Tesla (6, 7), la chambre de pompage (8) et l'unité de pompage (9) assure la fonction d'une unité de restriction.
  3. Carburateur selon la revendication 1 ou 2, caractérisé en ce que l'unité de pompage (9) est un élément à membrane.
  4. Carburateur selon la revendication 1 ou 2, caractérisé en ce que l'unité de pompage (9) comporte un piston de pompe.
  5. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'unité de pompage (9) est commandée en modulant la tension.
  6. Carburateur selon la revendication 5, caractérisé en ce que l'unité de pompage (9) est commandée en modulant l'amplitude d'impulsion.
  7. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'unité de pompage (9) est régulée sur la base de valeurs de mesure, comme en particulier une valeur lambda de gaz d'échappement.
  8. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que les diodes de Tesla (6, 7), avec du carburant pour moteur à combustion interne, présentent en tant que carburant une diodicité comprise entre 1,1 et 3, en particulier entre 1,3 et 2.
  9. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le nombre de Reynolds dans les diodes de Tesla (6, 7) est nettement inférieur au nombre de Reynolds critique de 2300.
  10. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que les diodes de Tesla (6, 7) et la chambre de pompage (8) sont réalisées dans au moins l'une de deux plaques (22, 24) et que l'autre plaque (24, 22) sert de couvercle.
  11. Carburateur selon la revendication 10, caractérisé en ce que les diodes de Tesla (6, 7) et la chambre de pompage (8) sont réalisées par usinage de surface, comme par exemple électroérosion, laser, fraisage, mordançage, gaufrage, en particulier avec une matrice de microgaufrage.
  12. Carburateur selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'un carburateur présente au moins une première unité de régulation (30) se présentant sous forme d'une unité de restriction et au moins une autre unité de régulation (30) se présentant sous forme d'une unité de graissage.
EP10744862A 2009-05-27 2010-05-27 Carburateur commandé électriquement Not-in-force EP2435682B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009007558U DE202009007558U1 (de) 2009-05-27 2009-05-27 Elektrisch angesteuerter Vergaser
PCT/EP2010/003218 WO2010136199A1 (fr) 2009-05-27 2010-05-27 Carburateur commandé électriquement

Publications (2)

Publication Number Publication Date
EP2435682A1 EP2435682A1 (fr) 2012-04-04
EP2435682B1 true EP2435682B1 (fr) 2013-01-23

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Family Applications (1)

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EP10744862A Not-in-force EP2435682B1 (fr) 2009-05-27 2010-05-27 Carburateur commandé électriquement

Country Status (6)

Country Link
US (1) US8894043B2 (fr)
EP (1) EP2435682B1 (fr)
JP (1) JP5531096B2 (fr)
CN (1) CN102449289B (fr)
DE (1) DE202009007558U1 (fr)
WO (1) WO2010136199A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333412A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333397A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333410A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333394A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé

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DE202011051306U1 (de) 2011-09-15 2012-12-17 Makita Corporation Pumpvorrichtung zur steuerbaren Förderung eines Fluids durch eine Fluidleitung
US9903536B2 (en) 2014-08-26 2018-02-27 The Johns Hopkins University Passive diode-like device for fluids
DE102016123790A1 (de) 2016-12-08 2018-06-14 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes
DE102016123774B3 (de) 2016-12-08 2018-02-01 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes sowie Verfahren zum Regeln eines Kraftstoffdurchflusses in einem Leerlaufbetrieb eines Vergasers
DE102016123792A1 (de) * 2016-12-08 2018-06-14 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes
DE102016123791B3 (de) 2016-12-08 2017-12-07 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes
DE102016123788B3 (de) 2016-12-08 2017-12-07 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes sowie Verfahren zum Ansteuern eines Vergasers
DE102016123789A1 (de) 2016-12-08 2018-06-14 Makita Corporation Verfahren zum Bestimmen einer Blasenbildung in einer Pumpkammer eines Vergasers eines Verbrennungsmotors eines Arbeitsgerätes
DE202016106835U1 (de) 2016-12-08 2018-03-09 Makita Corporation Vergaser für einen Verbrennungsmotor eines Arbeitsgerätes
US10309424B1 (en) * 2017-11-20 2019-06-04 Robert Bosch Llc Vehicle fuel pump module including improved jet pump assembly

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333412A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333397A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333410A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
EP3333394A1 (fr) 2016-12-08 2018-06-13 Makita Corporation Commande d'un moteur à allumage commandé
WO2018105521A1 (fr) 2016-12-08 2018-06-14 Makita Corporation Commande de moteur à combustion à allumage par étincelle
WO2018105519A1 (fr) 2016-12-08 2018-06-14 Makita Corporation Commande d'un moteur à combustion,à allumage par étincelle
WO2018105522A1 (fr) 2016-12-08 2018-06-14 Makita Corporation Commande de moteur à combustion à allumage par étincelles

Also Published As

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CN102449289B (zh) 2014-11-05
CN102449289A (zh) 2012-05-09
DE202009007558U1 (de) 2010-10-14
US20120074600A1 (en) 2012-03-29
WO2010136199A1 (fr) 2010-12-02
EP2435682A1 (fr) 2012-04-04
JP5531096B2 (ja) 2014-06-25
US8894043B2 (en) 2014-11-25
JP2012528263A (ja) 2012-11-12

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