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EP2205855B1 - Dispositif d'injection compact - Google Patents

Dispositif d'injection compact Download PDF

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Publication number
EP2205855B1
EP2205855B1 EP08804690A EP08804690A EP2205855B1 EP 2205855 B1 EP2205855 B1 EP 2205855B1 EP 08804690 A EP08804690 A EP 08804690A EP 08804690 A EP08804690 A EP 08804690A EP 2205855 B1 EP2205855 B1 EP 2205855B1
Authority
EP
European Patent Office
Prior art keywords
injection device
fuel
pump
piston
suction jet
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
EP08804690A
Other languages
German (de)
English (en)
Other versions
EP2205855A1 (fr
Inventor
Joerg Heyse
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2205855A1 publication Critical patent/EP2205855A1/fr
Application granted granted Critical
Publication of EP2205855B1 publication Critical patent/EP2205855B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/027—Injectors structurally combined with fuel-injection pumps characterised by the pump drive electric
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0041—Means for damping pressure pulsations
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools

Definitions

  • the present invention relates to an injection device with a fuel pump, a pressure regulator, an injector, an aerator and a suction jet pump in a compact design.
  • Injectors are known in the prior art in various configurations. Especially for cost and space reasons require small internal combustion engines, which have only one or only two cylinders and a small displacement, independent solutions. Areas of use of such small internal combustion engines are, for example, two-wheelers, tricycles or lawn mowers, etc.
  • Known injection devices usually comprise in a tank a high-pressure pump with a pressure regulator, wherein the high-pressure pump injects fuel at a predetermined pressure into a duct, e.g. a rail or similar, promotes.
  • an injector is arranged, which injects fuel injected into a suction pipe or directly into a combustion chamber by a control device.
  • injectors are very expensive and especially expensive, so that they also make small internal combustion engines very expensive.
  • an electronic control fuel injection device in which an injector is disposed near a pump piston. Further, in this case, a pre-pressure valve is provided for exerting an admission pressure on the fuel in an initial phase of a pressure stroke of the piston in the return line of the fuel to the tank.
  • the admission valve evacuates a part of the fuel located in a pressure chamber in the return line. In this way, in particular the formation of vapor bubbles in the injector can be reduced.
  • the structure is relatively complicated and the device takes up a large amount of space.
  • a suction jet pump for filling a pot, which is connected upstream of a fuel pump.
  • the fuel is directed by means of the suction jet pump from the tank into the pot.
  • the suction jet pump is driven by a outgoing from the pressure side of the fuel pump return flow.
  • the Liquid level in the pot raised to a liquid level in the tank, so that when sucking the fuel from the pot, there is a higher inlet pressure in the intake pipe. This reduces the risk of vapor bubble formation in the supply line to the fuel pump.
  • this solution is also very expensive and expensive.
  • the injection device according to the invention with the features of claim 1 has the advantage that it has a very compact structure. Furthermore, the injection device according to the invention can be produced in a particularly simple and cost-effective manner and the formation of vapor bubbles in the fuel supply line can be avoided. As a result, the injection device according to the invention can be used in particular in small internal combustion engines, e.g. in two-wheelers or lawn mowers or the like, are used.
  • the injection device comprises a fuel pump, a pressure regulator for controlling an injection pressure, an injector, an aerator and a suction jet pump, consisting of a motive nozzle and a diffuser.
  • the fuel pump, the pressure regulator, the injector and the air actuator are an integral part of an injection module.
  • the injection module is very compact and physically small and can be completely pre-assembled.
  • the suction jet pump only has to be connected to the corresponding connection of the injection module.
  • the four integral components of the injection module are preferably arranged in a common housing of the injection module.
  • the suction jet pump ensures that in the injection module, the formation of vapor bubbles is prevented, so that damage to the injection module and the metering of incorrect amounts of fuel can be avoided.
  • the injection device according to the invention has a compact injection module and in addition a suction jet pump, so that a trouble-free operation of the fuel-conveying components is ensured and the formation of vapor bubbles can be avoided.
  • the suction jet pump is also an integral part of the injection module.
  • the compact injection module comprises five components, namely the fuel pump, the pressure regulator, the injector, the aerator and the ejector.
  • the suction jet pump can be particularly easily integrated be that the diffuser and the motive nozzle are arranged completely in the housing of the injector.
  • the injection device comprises exactly one actuator, which simultaneously actuates the fuel pump and the aerator.
  • a separate actuator for the aerator or the fuel pump can be dispensed with, so that the number of components is significantly reduced.
  • this also results in a cost reduction.
  • the only actuator of the injector assumes the function of the pump drive and, secondly, the function of the actuator for the air actuator.
  • the only actuator of the injection device is preferably a magnetic actuator with exactly one coil and exactly one armature. This allows a particularly simple and inexpensive construction can be realized.
  • the tank is disposed in the vehicle at a higher position than the suction jet pump.
  • a higher pressure level in the suction jet pump can also be realized.
  • the injection device comprises a return line which recirculates pressurized fuel from a pressure space to the ejector pump, more precisely to the motive nozzle.
  • the pressure chamber may be a pumping chamber of the piston pump or a pre-pressure chamber.
  • the fuel pump comprises an antechamber, which is arranged after the suction jet pump.
  • the fuel is pressurizable to a predetermined value.
  • a check valve is arranged between the admission pressure chamber and the suction jet pump.
  • the check valve opens only when a predetermined opening pressure is reached by the suction jet pump. Furthermore, the check valve ensures that fuel can not flow from the admission pressure chamber back into the suction jet pump.
  • the fuel pump comprises a piston, which is designed as a stepped piston with a first piston surface and a second piston surface.
  • the first piston surface is larger than the second piston surface.
  • the first piston surface is arranged in the pre-chamber and the second piston surface is arranged in the pumping chamber.
  • a through hole is arranged in the piston of the fuel pump, which connects the front pressure chamber with the pumping chamber.
  • a check valve is arranged, which prevents backflow of the fuel from the pumping chamber into the admission pressure chamber.
  • the fuel pump comprises a first piston member, a second piston member and a diaphragm.
  • the membrane is arranged in the direction of movement of the piston elements between the first and second piston element.
  • the two piston elements are arranged on a common axis.
  • the membrane forms a wall region of the admission pressure chamber. This allows a simple structure.
  • the suction jet pump is preferably made of a plastic material.
  • the suction jet pump can be produced for example by means of injection molding and also simultaneously with other components of the injection device, e.g. the housing by injection molding, are produced.
  • a compressible pressure buffer device for example a bubble filled with gas, is arranged in the admission pressure chamber.
  • a pressure buffer medium for example, a compressible medium disposed in the bubble, e.g. Air, serve.
  • FIGS. 1 and 2 a small motor 1 with an injection device according to the invention according to a first embodiment described in detail.
  • FIG. 1 schematically shows the structure of the small motor 1, which is designed as a single-cylinder engine.
  • the small engine 1 comprises a cylinder 3, a reciprocating piston 4, a control unit 5 and a tank 6.
  • the tank 6 is connected to an injection module 2 via a fuel supply line 6a.
  • a suction jet pump 40 is arranged directly on the injection module 2.
  • a return line 32 goes from the injection module 2 back to the suction jet pump 40.
  • the tank 6 is arranged above the injection module 2.
  • the injection module 2 is shown very schematically and comprises a fuel pump, a pressure regulator, an injector and an air actuator, so that the injection module 2 is constructed very compact.
  • the small engine 1 further comprises a throttle valve 7, which is arranged in a suction pipe 8.
  • a spark plug 9 On the cylinder 3, a spark plug 9, an intake valve 10 and an exhaust valve 11 is further arranged.
  • the reference numeral 12 designates a bypass line for air, which branches off from the intake manifold 8 air from a region in the flow direction of the air in front of the throttle valve 7 and leads directly to the integrated in the injection module 2 aerator. An outlet of the bypass line 12 lies directly adjacent to the injector of the injection module. 2
  • the small engine 1 further comprises an exhaust pipe 13, which is released or closed by the exhaust valve 11. Further, an oxygen sensor 14 is provided on the exhaust pipe 13 which is connected to the control unit 5, and the control unit 5 is further provided with a cooling water sensor 15, an oil temperature sensor 16 and a sensor unit 17 for detection a throttle position, a temperature in the intake manifold 8 and a pressure in the intake manifold 8.
  • the control unit 5 controls the injection device 2 on the basis of the received signals.
  • the injector according to the invention thus comprises, as in FIG. 2 shown, an injection module 2 with a fuel pump 20a, a pressure regulator 20b, an injector 20c and an air actuator 20d, which are arranged in a common housing 25, and can be designed to be particularly compact and compact.
  • the injection device according to the invention can be produced very inexpensively and in particular be pre-assembled in advance as a complete injection module 2, so that it only needs to be installed in the small engine 1 as a compact assembly.
  • the integration of the four items fuel pump, pressure regulator, injector and air actuator thus a simple and inexpensive manufacturability is guaranteed.
  • the fuel pump and the air actuator are actuated by a common actuator.
  • a suction jet pump 40 is provided.
  • the injection device 2 according to the invention can be used, for example, in small motors for two-wheelers or lawn mowers.
  • the injection module comprises a coil 21 and an armature 22 cooperating with the coil 21.
  • the armature 22 is as shown FIG. 2 can be seen, with a first piston member 23 and a second piston member 24 fixedly connected.
  • the first piston part 23 is assigned to the air actuator 20 d and releases at a seat 12 a a cross section of the bypass line 12 or closes the bypass line 12.
  • the injection module 2 comprises a housing 25, which is made of a plurality of individual parts 25a, 25b, 25c, 25d.
  • the individual parts of the housing take on different functions.
  • the seat 12a is formed on the item 25 of the housing.
  • the injection module comprises a first admission pressure chamber 26, a second admission pressure chamber 27 and a pumping chamber 28.
  • the first admission pressure chamber 26 and the pumping chamber 28 are in contact with the second piston part 24.
  • the second piston part 24 forms a part of the fuel pump 20a.
  • the second piston part 24 is formed as a stepped piston and has a first piston surface 24a and a second piston surface 24b.
  • the first piston surface 24a is in contact with the fuel in the first admission pressure chamber 26 and the second piston surface is in contact with the fuel in the pumping chamber 28.
  • the second piston part 24 is thereby guided by guide areas, which are formed on the housing parts 25c and 25d.
  • the first admission pressure chamber 26 is connected via a line 30 to the second admission pressure chamber 27, wherein a first check valve 29 is arranged in the line. Furthermore, the second admission pressure chamber 27 is connected to the pumping chamber 28 via a second check valve 31. In a known manner, fuel can then be injected into the suction pipe 8 from the pumping chamber 28 via a check valve of the injector 20c.
  • the second admission pressure chamber 27 is further connected via a line 32 to the suction jet pump 40.
  • the pressure regulator 20b is arranged in the line 32.
  • the pressure regulator 20b of this embodiment includes a throttle 35.
  • a check valve may be provided.
  • the suction jet pump 40 is arranged in the supply line 6a from the tank 6. How out FIG. 2 can be seen, the suction jet pump 40 comprises only a driving nozzle 41 and a diffuser 42. This allows the suction jet pump 40 is very simple and inexpensive, for example, as a plastic injection molded part, are provided.
  • the suction jet pump 40 is arranged in a curved line section 6a ', so that the fuel emerging from the motive nozzle 41 exits the tank 6 parallel to the flow direction of the fuel. How farther FIG. 2 it can be seen, the end of the diffuser 42 is connected to the first pre-pressure chamber 26, wherein between the first pre-pressure chamber 26 and the diffuser 42 is still a third check valve 43 is arranged.
  • the suction jet pump 40 is arranged directly on the housing.
  • the second piston part 24 is reset by means of a return spring 34, which is supported on a chamber wall 33 of the first admission pressure chamber 32 and presses against the first piston surface 24a.
  • reference numeral 36 denotes an air-filled cavity. It should be noted that the cavity 36 need not necessarily be provided, but it is also possible that, for example, the return element for the second piston member 24 may be disposed in the cavity, so that the return element is not located in the fuel.
  • the function of the injection device according to the invention according to the first embodiment is as follows.
  • the coil 21 is energized, so that the armature 22 moves in the direction of the arrow A. Since the armature 22 is fixedly connected to the first piston part 23 and the second piston part 24, the two piston parts move simultaneously with the armature 22 in the direction of the arrow A. This opens the air actuator 20d.
  • an increase in pressure takes place in the first admission pressure chamber 26, since the first piston surface 24a is moved further into the first admission pressure chamber 26. Due to this increase in pressure, the first check valve 29 opens so that pressurized fuel flows into the second admission pressure chamber 27.
  • the fuel located in the pumping chamber 28 is pressurized via the second piston surface 24b, the injector 20c automatically opening from a predetermined pressure level and injecting fuel into the intake manifold 8.
  • the second pre-pressure chamber 27 is connected via the line 32 to the suction jet pump 40, fuel is at a predetermined pressure to the suction jet pump 40 at.
  • the energization of the coil 21 is released again and the armature 22 by means of the return spring 34 which resets the second piston member 24, also returned to its original position.
  • this also applies to the first piston part 23 fixedly connected to the armature 22, so that the air actuator 20d is likewise closed.
  • the provision of the second piston member 24 simultaneously causes a suction of new fuel.
  • fuel is sucked from the second admission pressure chamber 27 via the second check valve 31 into the pumping chamber 28 and, on the other hand, fuel is sucked out of the tank 6 by opening the third check valve 43.
  • the suction jet pump 40 is provided.
  • the suction jet pump 40 provides the drive of the suction jet pump via the drive nozzle 41. For this comes to the coming of the tank volume flow of the fuel nor an additional volume flow through the motive nozzle 41.
  • the motive nozzle 41 is thereby supplied under pressure fuel from the second admission pressure chamber 27 via the line 32 ,
  • the fuel from the motive nozzle leaves it at a higher speed and due to internal friction results in a turbulent flow, which enters the diffuser 42.
  • the diffuser there is a steady pressure increase, so that it can be avoided that vapor bubbles can arise in the fuel.
  • the third check valve 43 opens, so that the fuel can be supplied to the first admission pressure chamber 26.
  • the end of the diffuser is arranged directly on the housing 25.
  • the suction jet pump 40 can be arranged completely in the injection module 2. This allows an even more compact design can be realized. It should also be noted that the drive nozzle 41, the diffuser 42 and the 90 ° curved line section 6a 'can be made of a plastic material in one step, for example by plastic injection molding. As a result, the suction jet pump 40 can be provided in a particularly cost-effective manner.
  • the injection valve additionally has to circulate the volume flow necessary for driving the suction jet pump 40 via the line 32.
  • the pressure energy transferred to this additional volume flow is then used to raise the pressure in the intake area above the tank pressure so that the formation of vapor bubbles in the intake area can be avoided with certainty.
  • the tank 6 is additionally arranged slightly above the injection module 2, so that this also results in a certain pressure increase in the intake area.
  • a particularly high pressure in the first admission pressure chamber 26 is achieved if a ratio of the injected volume flow to the intake volume flow (circulated volume flow plus injected volume flow) is relatively small. That is, the recirculated volume flow is much larger than the injected volume flow.
  • a diameter in the driving nozzle 41 can be selected to be relatively small in order to achieve a high pressure in the first admission pressure chamber.
  • FIG. 3 an injection device with an injection module 2 according to a second embodiment described in detail. Identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment.
  • the injection module of the second embodiment is even more compact.
  • the fuel pump 20a of the second embodiment comprises a diaphragm 50 and a piston 51 exposed in a cylinder.
  • a through-hole 52 which connects a pre-pressure chamber 26 to a pumping chamber 28.
  • a first check valve 29 is arranged in the through hole 52.
  • the membrane 50 is firmly fixed to the housing 25 of the injection module and forms a chamber wall of the prechamber 26.
  • the fuel pump 20a of the second embodiment comprises a plunger 53 which is fixedly connected to the armature 22.
  • the plunger 23 and a piston part 23 of the air actuator 20d are fixedly connected to the armature 22 and therefore move together.
  • a return spring 54 is also provided.
  • the function of the injection module 2 according to the second embodiment is as follows. If an injection of fuel to be made, the coil 21 is energized, so that the armature 22 moves together with the plunger 53 and the piston member 23 in the direction of arrow A. As a result, the plunger 53 comes into contact with the diaphragm 50, which is pressed into the admission pressure chamber 26. This results in an increase in pressure in the pre-pressure chamber 26, wherein an upper limit of the pressure is defined by the first check valve 29. When the diaphragm 50 has traveled a small distance in the direction of the arrow A, it comes into contact with a contact region 51a on the exposed piston 51, so that the membrane is moved together with the exposed piston 51.
  • the piston 51 is moved against the spring force of the return spring 34, and the pressure in the pumping chamber 28 increases.
  • the injector 20 c opens, so that fuel can be injected into the suction pipe 8, as indicated by the arrow B.
  • a part of the volume flow is not injected into the suction tube, but guided via the line 23 to the suction jet pump 40.
  • the suction jet pump 40 functions as in the first embodiment, so that by the pressure return and the suction jet pump formation steam bubbles in the intake of the fuel pump is avoided.
  • the second embodiment thus has a reduced number of parts and can be provided very compact and small-sized. This makes it particularly suitable for small machines.
  • a common actuator simultaneously actuates both the fuel pump 20a and the air actuator 20d.
  • the actuator in particular only one electrical connection for the actuator has to be provided, which according to the invention always simultaneously actuates the air actuator 20d and the fuel pump 20a.
  • an additional air supply via the bypass line 12 is always achieved simultaneously with the fuel injection, so that a better mixing of the fuel in the supplied air is achieved in the mixture preparation in the intake manifold 8.
  • the suction jet pump 40 surely allows the occurrence of vapor bubbles in the suction region of the fuel pump in operation.

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

Claims (15)

  1. Dispositif d'injection, comprenant une pompe à carburant (20a), un régulateur de pression (20b), un injecteur (20c) et un dispositif de commande d'air (20d), caractérisé en ce que la pompe à carburant (20a), le régulateur de pression (20b), l'injecteur (20c) et le dispositif de commande d'air (20d) font partie intégrante d'un module d'injection (2), un actionneur commun (21, 22) actionnant la pompe à carburant (20a) et le dispositif de commande d'air (20d), et le dispositif d'injection comprenant en outre une pompe à jet d'aspiration (40), par le biais de laquelle du carburant est acheminé depuis un réservoir (6), la pompe à jet d'aspiration (40) étant connectée au réservoir (6) et à la pompe à carburant (20a).
  2. Dispositif d'injection selon la revendication 1, caractérisé en ce que la pompe à jet d'aspiration (40) fait partie intégrante du module d'injection (2).
  3. Dispositif d'injection selon l'une quelconque des revendications précédentes, comprenant exactement un actionneur (21, 22), qui actionne simultanément la pompe à carburant (20a) et le dispositif de commande d'air (20d).
  4. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un réservoir (6) est disposé au-dessus de la pompe à jet d'aspiration (40).
  5. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une conduite de retour (32) conduit du carburant depuis une région de pression de la pompe à carburant (20a) jusqu'à la pompe à jet d'aspiration (40).
  6. Dispositif d'injection selon la revendication 5, caractérisé en ce qu'un étranglement (35) ou un clapet anti-retour est disposé dans la conduite de retour (32).
  7. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une chambre de pression pilote (26) est disposée dans la direction de l'écoulement après la pompe à jet d'aspiration (40), le carburant pouvant être stocké temporairement à une pression pilote prédéterminée dans cette chambre de pression pilote.
  8. Dispositif d'injection selon la revendication 7, caractérisé en ce qu'un clapet anti-retour (43) est disposé entre la pompe à jet d'aspiration (40) et la chambre de pression pilote (26).
  9. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un piston (24) de la pompe à carburant (20a) est formé en tant que piston étagé avec une première surface de piston (24a) et une deuxième surface de piston (24b), la première surface de piston (24a) étant supérieure à la deuxième surface de piston (24b).
  10. Dispositif d'injection selon la revendication 9, caractérisé en ce que la première surface de piston (24a) est disposée dans la chambre de pression pilote (26) et la deuxième surface de piston (24b) est disposée dans une chambre de pompe (28).
  11. Dispositif d'injection selon l'une quelconque des revendications 7 à 10, caractérisé en ce qu'un alésage traversant (52) est pratiqué dans le piston (51) de la pompe à carburant (20a), lequel relie la chambre de pression pilote (26) à la chambre de pompe (28), un clapet anti-retour (39) étant disposé dans l'alésage traversant (52).
  12. Dispositif d'injection selon l'une quelconque des revendications 7 à 11, caractérisé en ce que la pompe à carburant (20a) comprend une membrane (50) ainsi qu'un premier piston (53) et un deuxième piston (51), la membrane (50) étant disposée entre le premier et le deuxième piston et formant une région de paroi de la chambre de pression pilote (26).
  13. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce que la pompe à jet d'aspiration (40) est fabriquée en plastique.
  14. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un dispositif de pression tampon compressible, en particulier une vessie remplie de gaz, est disposé dans la chambre de pression pilote (26) de la pompe à carburant (20a).
  15. Moteur à combustion interne, comprenant exactement un ou exactement deux cylindres, et un dispositif d'injection selon l'une quelconque des revendications précédentes.
EP08804690A 2007-10-23 2008-09-24 Dispositif d'injection compact Not-in-force EP2205855B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007050547A DE102007050547A1 (de) 2007-10-23 2007-10-23 Kompakte Einspritzvorrichtung
PCT/EP2008/062786 WO2009053201A1 (fr) 2007-10-23 2008-09-24 Dispositif d'injection compact

Publications (2)

Publication Number Publication Date
EP2205855A1 EP2205855A1 (fr) 2010-07-14
EP2205855B1 true EP2205855B1 (fr) 2011-06-15

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EP08804690A Not-in-force EP2205855B1 (fr) 2007-10-23 2008-09-24 Dispositif d'injection compact

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EP (1) EP2205855B1 (fr)
CN (1) CN101835971A (fr)
AT (1) ATE513124T1 (fr)
DE (1) DE102007050547A1 (fr)
WO (1) WO2009053201A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102009003081A1 (de) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Kompakte Einspritzvorrichtung mit nach innen öffnendem Injektor
JP6421767B2 (ja) * 2016-02-12 2018-11-14 株式会社デンソー 燃料ポンプの制御装置

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Publication number Priority date Publication date Assignee Title
JP4431268B2 (ja) 2000-11-17 2010-03-10 株式会社ミクニ 電子制御燃料噴射装置
CN100439700C (zh) * 2004-12-08 2008-12-03 浙江飞亚电子有限公司 一种集成式供油单元
US7458364B2 (en) * 2005-08-05 2008-12-02 Scion-Sprays Limited Internal combustion engine having a fuel injection system

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WO2009053201A1 (fr) 2009-04-30
DE102007050547A1 (de) 2009-04-30
ATE513124T1 (de) 2011-07-15
CN101835971A (zh) 2010-09-15
EP2205855A1 (fr) 2010-07-14

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