WO2009092658A1 - Dispositif d'injection compact de conception simple - Google Patents

Dispositif d'injection compact de conception simple Download PDF

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Publication number
WO2009092658A1
WO2009092658A1 PCT/EP2009/050405 EP2009050405W WO2009092658A1 WO 2009092658 A1 WO2009092658 A1 WO 2009092658A1 EP 2009050405 W EP2009050405 W EP 2009050405W WO 2009092658 A1 WO2009092658 A1 WO 2009092658A1
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WO
WIPO (PCT)
Prior art keywords
space
line
injection device
pump
fuel
Prior art date
Application number
PCT/EP2009/050405
Other languages
German (de)
English (en)
Inventor
Guenther Hohl
Harald Lang
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
Priority to CN2009801028374A priority Critical patent/CN101925735B/zh
Publication of WO2009092658A1 publication Critical patent/WO2009092658A1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/04—Pumps peculiar thereto
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting 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
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/04—Fuel-injectors combined or associated with other devices the devices being combustion-air intake or exhaust 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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
    • F02M69/32—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 with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
    • 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
    • F02M69/34—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 with an auxiliary fuel circuit supplying fuel to the engine, e.g. with the fuel pump outlet being directly connected to injection nozzles

Definitions

  • the present invention relates to an injection device with a fuel pump, a pressure regulator, an injector and an air actuator 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
  • injectors usually comprise in a tank a fuel pump with a pressure regulator, the fuel pump injecting fuel at a predetermined pressure into a duct, e.g. a rail o.a., promotes.
  • a control device injects fuel into a suction pipe or directly into a combustion chamber.
  • injectors are very expensive and especially expensive, so that they also make small internal combustion engines very expensive.
  • a fuel injection device with electronic control in which an injector is arranged close to 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.
  • 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.
  • the injection device is a fuel pump, a Pressure regulator for controlling an injection pressure, an injector and an air actuator comprises, which are integral components of an injection module.
  • the injection module is a compact, small-sized component.
  • the pressure regulator is an integral part of the injector.
  • the fuel pump includes a pumping space in which the fuel is pressurizable and the injection module further includes an integrated suction space.
  • the suction chamber is with the
  • free connection line means a freely flowable line or bore, in which no valve or the like is arranged and thus fuel can flow freely from the suction chamber to the pump chamber or vice versa.
  • the free connection line is preferably a bore of constant diameter.
  • the Injector can be reduced because it can be dispensed with a check valve between the suction and the pump chamber.
  • the injection module can be completely pre-assembled so that it only needs to be connected to the necessary connections and can be installed directly into a vehicle.
  • the components of the injection module are preferably arranged in a common housing of the injection module. In addition to the compactness of the
  • Injection module is another great advantage that other components for the injection module can be minimized.
  • a total stroke of a piston of the fuel pump comprises a Ausschiebeteilhub and a Druckmaschinesteilhub.
  • the Ausschiebeteilhub and Druckmaschineungsteilhub together form the total stroke of the piston.
  • the Ausschiebeteilhub is preferably equal to or greater than the Druckmaschinesteilhub.
  • Ausschiebeteilhubs can be pushed out of the pump chamber and then only liquid fuel in the pump room is available for the Druckmaschineungsteilhub. Furthermore, it is ensured by the Vorschalteteilhub before the Druckmaschinesteilhub, that the piston of the fuel pump has a predetermined speed and thus brings sufficient momentum for the Druckmaschineungsteilhub.
  • a first check valve is arranged between the pumping space and a return space, and a connection to the tank is established via the return space.
  • the check valve prevents that fuel vapor from the return chamber can inadvertently get into the pump chamber.
  • a pump chamber mouth of a connecting line between the pump chamber and the return chamber and closer to the injector is arranged as an opening of the free connecting line between the suction chamber and the pump chamber. This ensures that a control edge of the piston first closes the free connecting line between the pump chamber and the suction chamber and then only the connecting line between the pump chamber and the return chamber.
  • the injection device further comprises an annular space, in which a fuel supply line and a fuel return line open.
  • the annulus is thus a combined intake and return space.
  • the annular space does not necessarily have to be ring-shaped, but can assume any desired shape.
  • an annular configuration of the annular space has the advantage that the injection device can be made very compact.
  • a connecting line is provided, which connects the annular space with the pump space.
  • the connecting line has a common branch line to the pump room and a branch to the annulus.
  • the branching to the annulus comprises a first conduction region and a second conduction region.
  • the first line region is arranged below the second line region and both line regions open into the annulus.
  • the annular space has the largest possible volume, in the annular space preferably connected to a spring chamber, in which a return spring for an armature of the fuel pump is arranged.
  • the first line region of the branch of the connecting line between the pump chamber and the annular space is arranged at the level of a bottom of the annular space. This ensures that during a suction phase over the first line area exclusively - A -
  • liquid fuel which is completely outgassed (thick juice) is sucked. This ensures that no or only a minimal amount of vaporous fuel is sucked into the pump chamber.
  • the connecting line between the pump space and the annular space is designed such that the common stub opens into the middle of the branch between the first and second line region of the branch.
  • the injection device comprises a central housing block in which the pumping space is formed. Connecting lines to the suction and / or return space or the annulus can be easily provided by drilling.
  • the injection device preferably 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 omitted in each case, so that the number of components is significantly reduced. Of course, this also results in a cost reduction.
  • the common actuator assumes first the function of the pump drive and secondly the function of the actuator for the air actuator.
  • the common actuator may perform a simultaneous actuation of the fuel pump and the air actuator, wherein the actuator comprises a coil, a first armature and a second armature.
  • the first armature is assigned to the air actuator and the second armature of the fuel pump, and both anchors can be activated by means of the common coil.
  • the first armature is preferably a part of the air regulator and the second armature is a part of the fuel pump.
  • the first armature is a valve member of the air regulator and the second armature is a piston of the fuel pump.
  • the present invention relates to an internal combustion engine which comprises exactly one cylinder or exactly two cylinders and a fuel injection device according to the invention.
  • the internal combustion engine comprises a fuel tank, which above the
  • Injection module is arranged.
  • the fuel pump can be designed very small.
  • FIG. 1 shows a schematic view of a small motor with an injection device according to a first embodiment of the invention
  • Figure 2 is a schematic view of the injection device according to the first embodiment
  • Figure 3 is a schematic view of the injection device according to a second embodiment.
  • FIG. 1 shows schematically 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 fuel return line 6b goes from the injection module 2 back to the tank 6.
  • the tank 6 is arranged above the injection module 2.
  • the injection module 2 is shown very schematically and includes a fuel pump, an injector with integrated pressure regulator, and an air actuator, so that the injection module 2 is 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 are further arranged.
  • the reference numeral 12 designates a bypass line for air, which branches off air from the intake manifold 8 from a region in the flow direction of the air in front of the throttle valve 7 and leads directly to the integrated into the injection module 2 air actuator.
  • An outlet 12z of the bypass line 12 opens in the intake manifold 8 behind the throttle valve. 7
  • 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 the
  • the injection device according to the invention is thus provided as an injection module 2 with a fuel pump, a pressure regulator, an injector and an air actuator, and can be designed to be particularly compact and physically small. Furthermore, 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, 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. As a result, the injection device 2 according to the invention can be used, for example, in small engines of two-wheelers or lawnmowers.
  • FIG. 2 shows the injection module 2 in detail.
  • the fuel pump 20a, the pressure regulator 20b, the injector 20c and the aerator 2Od are integrated.
  • a multi-part housing 25 (shown only schematically in FIG. 2) is provided.
  • the pressure regulator 20b is part of the injector 20c.
  • a common actuator simultaneously actuates the fuel pump 20a and the aerator 2Od.
  • the common actuator comprises a coil 21, a first armature 22 and a second armature 23.
  • the first armature 22 is part of the air actuator 2Od
  • the armature 22 has formed at one end a valve member 22a, which at a valve seat 12a of the bypass line 12, the bypass line 12 can release or close.
  • the aerator 2Od is further associated with a first return spring 28.
  • the actuator further includes a second armature 23, which in this embodiment is a part of the fuel pump 20a.
  • the second armature 23 is fixedly connected to a piston 26 of the fuel pump 20a.
  • the second armature 23 and the piston 26 can only touch each other without a fixed connection.
  • the second armature 23 is a cylindrical component and is guided inside the coil 21 by means of a guide element 19.
  • the guide element 19 has, in addition to a guide function, also a support function for the first return spring 28.
  • Reference numeral 29 denotes a non-magnetic element to interrupt the iron circle of the coil 21.
  • the coil 21 actuates, when energized, both the first armature 22 and the second armature 23. After elimination of the energization of the coil 21 are the first
  • the second return spring is supported on a housing block 25a and an end face of the second armature 23.
  • Fuel return line 6b arranged.
  • the fuel supply line 6a discharges into an intake space 30.
  • the fuel return line 6b starts from a return space 32.
  • the volume of Intake space 30 and the return space 32 are approximately equal.
  • the suction space 30 and the return space 32 may also form a common space.
  • a pumping space 31 is further formed in the housing block 25a.
  • the pumping space 31 is connected via a first bore 33 with the suction chamber 30 and via a second bore 34 with the return space 32.
  • no check valve is arranged between the suction chamber 30 and the pump chamber 32 above.
  • the bore 33 thus forms a free connecting line between the pump chamber 31 and the suction chamber 30.
  • a first check valve 35 is arranged between the pump chamber 31 and the return chamber 32.
  • the pump chamber 31 is part of the fuel pump 20b.
  • the piston 26 of the fuel pump is arranged in the housing block 25a such that it can pressurize a fluid located in the pumping space 31.
  • the piston 26 is firmly connected to the second armature 23.
  • the position shown in Figure 2 is a position at the end of a suction stroke of the fuel pump 20a.
  • the pump chamber 31, the first armature 22 and the second armature 23 lie on a common axis XX.
  • a pump space mouth of the second bore 34 in the axial direction XX of the injection module 2 is arranged at a position closer to the injector 20c than the pump space mouth of the first bore 33.
  • the injector 20c includes a valve member 40 which is an outwardly opening valve member.
  • the valve member 40 is disposed in a nozzle space 41 and includes a valve seat 40a and a spring holding portion 40b.
  • a return spring 42 is disposed between the spring holding portion 40 b and a bottom portion 41 a of the nozzle space 41.
  • a pressure in the nozzle chamber 41 acts via a pressure surface 40c of the valve member 40.
  • a second check valve 36 is arranged in a connection between the pump chamber 31 and the nozzle chamber 41.
  • the check valve 36 is supported by a spring against the pressure surface 40 c of the valve member 40 and opens when a pressure in the pump chamber 31 is higher than a pressure in the nozzle chamber 41.
  • a cage-like member is provided for holding the spring and the ball of the second check valve 36.
  • the pressure regulator 20b is thus integrated in the injector 20c and comprises the return spring 42 and the spring holding portion 40b of the valve member 40, against which the return spring 42 is supported.
  • a connecting line 34 is arranged between the pumping space 31 and the return space 32 in the axial direction XX of the injection module 2 below the first connecting line 33.
  • An installation position of the injection module 2 is selected such that a vertical direction coincides with the longitudinal direction XX of the injection module.
  • the function of the injection module 2 according to the invention is as follows. An intake phase of the fuel pump 20a is introduced through the second return element 24, wherein the rest position of the second return element 24 defines the end of the intake phase. During the suction phase, the first check valve 35 and the second check valve 36 are closed. After a control edge 26a of the piston 26 during the return movement, ie, upward movement of the
  • Piston 26 has been moved behind the mouth of the first connecting line 33, fuel from the suction chamber 30 via the first connecting line 33 begins to flow into the pump chamber 31.
  • the first and second check valves 35, 36 remain closed in each case. If there are gases in the pump chamber 31, they collect below the pressure surface at the control edge 26a of the piston 26. With the beginning of the pressure phase, the piston 26 in the direction of
  • Arrow A moves down when the coil 21 is energized.
  • possibly existing gases are pushed out via the first connection line 33 back into the suction space 30 or the now open first check valve 35 into the return space 32.
  • the gases are pushed out only in the return space 32 via the open first check valve 35.
  • the first part of the piston stroke is used for pushing out of any existing fuel vapors or other gases. Since the piston stroke for the degassing is relatively large, even large amounts of gas can be expelled from the pump chamber 31. After the piston 26, more precisely the control edge 26a of the piston, has crossed the connecting line 34, only the actual pressure build-up in the pressure chamber 31 begins.
  • the second check valve 36 opens that fuel can flow from the pumping space 31 into the nozzle space 41. If now the pressure in the nozzle chamber 41 is greater than a restoring force of the return spring 42, the valve member 40 opens to the outside, so that fuel can be injected into the suction pipe 8. When the pressure in the nozzle chamber 41 drops below the opening pressure again due to the injection, the return spring 42 closes the valve member 40 again. The energization of the coil 21 is stopped and the second return spring 24 reverses the direction of movement of the piston 26 again and the intake begins again as soon as the control edge 26a has crossed over the pump space mouth of the first connecting line 33.
  • the energization of the coil 21 is terminated, so that the return springs 24 and 28, the first and second armature 22, 23 back to their original positions.
  • the aerator 2Od is closed again and during the return of the second armature 23, the piston 26 is pulled back so that the suction phase begins again.
  • the restoring forces of the return springs 24 and 28 are designed such that, with only a small current to the coil 21, the air actuator 2Od can also be operated separately without actuating the fuel pump.
  • the injection module 2 has a common actuator for the fuel pump 20a and the aerator 2Od.
  • the aerator 2Od can open and close and in operating states in which it is not absolutely required, it can be ensured that despite the common actuator with the Fuel pump 20 a actuation of the fuel pump 20 a is not delayed or otherwise hindered.
  • a magnetic actuator by energizing a coil has been described as an actuator.
  • closure element 22a of the air actuator 2Od can also be designed as a tapering, in particular conical, end region of the armature 22, or in any other way, for example as a sphere or part sphere.
  • the second embodiment substantially corresponds to the first embodiment, in contrast to the second embodiment, the injection module 2 has an annular space 50, which is a combined intake and return space.
  • the annular space 50 is provided annularly around a housing block 25a, in which the pumping space 31 is arranged. Between the pumping chamber 31 and the annular space 50, a connecting line 51 is provided which connects the pumping space 31 with the annular space 50.
  • the connecting line 51 comprises a common Stub 52, which emanates from the pumping space 31, and a branch 53.
  • the branch 53 comprises a first line region 53a and a second line region 53b.
  • the first line region 53a is arranged below the second line region 53b.
  • the common stub 52 extends approximately from the center of the branch 53 (see Figure 3). In this case, the first line region 53a is opened toward the annular space 50 such that an opening of the first line region 53a lies at the level of a bottom region 50a of the annular space 50.
  • the annulus 50 is connected to a tank (not shown) via a fuel supply line 6a and a fuel return line 6b.
  • a fuel supply line 6a is connected to a tank (not shown) via a fuel supply line 6a and a fuel return line 6b.
  • an opening of the fuel return line 6b is arranged at a position on the tank, which is higher than a connection for the fuel supply line 6a. This ensures that fuel is supplied via the fuel supply line 6a to the annulus 50.
  • a connection to a spring chamber 55 is made via the second line region 53b, the second return spring 24 for the second armature 23 and the piston 26 being arranged in the spring chamber 55.
  • FIG. 3 shows again the state of the injection module 2, in which a suction phase is completed.
  • the piston 26 is moved (as indicated by the arrow A) down. Since an open connection is made between the pumping chamber 31 and the annular space 50 via the connecting line 51, any existing fuel vapors or other gases are expelled via the connecting line 51.
  • the gases are ejected to the annular space 50 mainly via the second line region 53b, which is arranged above the common stub line 51. After exiting the second conduit portion 53b into the annulus 50, the gases will rise upward in the direction of the fuel return line 6b and returned to the tank.
  • the arrangement of the branch 53 makes it possible that a certain chimney effect in the branch 53 is formed, whereby an increase of the gases in the second line region 53 b is favored.
  • the control edge 26b has not completely crossed over the common stub 52, there is still no pressure build-up in the pump chamber 31. This occurs only when the common stub 52 has been completely overrun by the piston 26.
  • the check valve 36 opens, which in a connection between the
  • an injection module is achieved, which requires neither a check valve between the pump chamber and the suction chamber nor a check valve between the pump chamber and return chamber. Since in this embodiment a common
  • this injection module can be designed to be particularly compact and physically small. Furthermore, in particular a number of moving parts can be minimized, so that this injection module is particularly robust and durable.

Abstract

La présente invention concerne un dispositif d'injection, comprenant une pompe à carburant (20a), un régulateur de pression (20b), un injecteur (20c) et un régulateur d'air (20d). Ce dispositif d'injection est caractérisé en ce que la pompe à carburant (20a), l'injecteur (20c) et le régulateur d'air (20d) font partie intégrante d'un module d'injection (2), en ce que le régulateur de pression (20b) fait partie intégrante de l'injecteur (20c) et en ce que la pompe à carburant (20a) comprend un espace de pompage (31) et le module d'injection (2) comprend un espace d'aspiration (30; 50), l'espace d'aspiration (30; 50) et l'espace de pompage (31) étant reliés par un conduit de liaison (33; 51) libre.
PCT/EP2009/050405 2008-01-23 2009-01-15 Dispositif d'injection compact de conception simple WO2009092658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009801028374A CN101925735B (zh) 2008-01-23 2009-01-15 设有简单结构的紧凑型喷射装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810005647 DE102008005647A1 (de) 2008-01-23 2008-01-23 Kompakte Einspritzvorrichtung mit einfachem Aufbau
DE102008005647.2 2008-01-23

Publications (1)

Publication Number Publication Date
WO2009092658A1 true WO2009092658A1 (fr) 2009-07-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/050405 WO2009092658A1 (fr) 2008-01-23 2009-01-15 Dispositif d'injection compact de conception simple

Country Status (4)

Country Link
CN (1) CN101925735B (fr)
DE (1) DE102008005647A1 (fr)
TW (1) TWI439607B (fr)
WO (1) WO2009092658A1 (fr)

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CN104956064B (zh) 2012-10-25 2019-02-19 比克喷射有限公司 燃料喷射系统
DE102014209369A1 (de) * 2014-05-16 2015-11-19 Robert Bosch Gmbh Vorrichtung zum Einspritzen eines Mediums, Abgasnachbehandlungsanlage
CN106438267B (zh) * 2015-08-10 2019-02-15 浙江福爱电子有限公司 一种脉冲耦合泵
EP3455498A4 (fr) 2016-05-12 2020-01-01 Briggs & Stratton Corporation Injecteur de distribution de carburant
US10947940B2 (en) 2017-03-28 2021-03-16 Briggs & Stratton, Llc Fuel delivery system
US11668270B2 (en) 2018-10-12 2023-06-06 Briggs & Stratton, Llc Electronic fuel injection module
DE102019217143A1 (de) * 2019-11-06 2021-05-06 Prüfrex engineering e motion gmbh & co. kg Verfahren zum Betrieb eines Verbrennungsmotors

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EP1340906A1 (fr) * 2000-11-17 2003-09-03 Mikuni Corporation Dispositif d'injection de carburant a commande electronique
WO2007017630A1 (fr) * 2005-08-05 2007-02-15 Scion-Sprays Limited Unité d’injection de carburant

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DE403354C (de) * 1924-09-25 Arthur Oskar Leonard Wennerby Brennstoffpumpe fuer Verbrennungsmaschinen in Verbindung mit einem Luftventil
DE2419425A1 (de) * 1974-04-23 1975-11-06 Daimler Benz Ag Einspritzvorrichtung fuer gemischverdichtende brennkraftmaschinen
GB2049031A (en) * 1979-05-12 1980-12-17 Lucas Industries Ltd Fuel injection systems
EP1340906A1 (fr) * 2000-11-17 2003-09-03 Mikuni Corporation Dispositif d'injection de carburant a commande electronique
WO2007017630A1 (fr) * 2005-08-05 2007-02-15 Scion-Sprays Limited Unité d’injection de carburant

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DE102008005647A1 (de) 2009-07-30
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TW200946771A (en) 2009-11-16
CN101925735B (zh) 2012-09-05

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