EP2126334B1 - Einspritzventil für verbrennungsmotor - Google Patents

Einspritzventil für verbrennungsmotor Download PDF

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Publication number
EP2126334B1
EP2126334B1 EP08788034A EP08788034A EP2126334B1 EP 2126334 B1 EP2126334 B1 EP 2126334B1 EP 08788034 A EP08788034 A EP 08788034A EP 08788034 A EP08788034 A EP 08788034A EP 2126334 B1 EP2126334 B1 EP 2126334B1
Authority
EP
European Patent Office
Prior art keywords
injector
stem
assembly
blocking
duct
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
EP08788034A
Other languages
English (en)
French (fr)
Other versions
EP2126334A2 (de
Inventor
André AGNERAY
Nadim Malek
Laurent Levin
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP2126334A2 publication Critical patent/EP2126334A2/de
Application granted granted Critical
Publication of EP2126334B1 publication Critical patent/EP2126334B1/de
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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/10—Other injectors with multiple-part delivery, e.g. with vibrating 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/161—Means for adjusting injection-valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion

Definitions

  • the present invention relates to a fuel injector for an internal combustion engine, in particular diesel, intended in particular to be implemented in a motor vehicle.
  • a conventional internal combustion engine comprises at least one cylinder in which a piston slides between two extreme positions.
  • the piston defines with the cylinder and a cylinder head a combustion chamber.
  • an injector has the function of supplying finely pulverized fuel to the combustion chamber of the internal combustion engine.
  • An injector 10 as shown in FIG. figure 1 allowing to perform injections at ultrasonic frequencies.
  • This injector 10 comprises an injector body 12, intended to be fixed to the upper end of the engine cylinder head by means not shown, which terminates in its lower part by a nozzle 14 and which has a first internal cavity 16 and a second upper cavity 18.
  • the first inner cavity 16 is intended to be filled with pressurized fuel. To do this, the first cavity 16 is connected to a fuel supply port 20 adapted to be placed in communication with a pressurized fuel supply circuit (not shown).
  • the first cavity 16 opens at the lower end 22 of the nozzle 14, also called the nose of the injector, through an injection orifice 23.
  • the injector 10 also comprises a rod 24, or needle, extending mainly along the axis YY '.
  • the rod 24 is housed axially movable inside the nozzle 14.
  • the lower end of the rod 24 has a closure head 26 extending in part outside the nozzle 14. This sealing head 26 is adapted to come into contact with the inner surface of the nozzle 14 delimiting the injection orifice of the nozzle 14 so as to close off the fuel injection orifice.
  • an active assembly 28 shown in partially cutaway view on the figure 1 which is supplied with current by means of electric cables 29.
  • the active assembly 28 comprises in this case a magnetostrictive rod 34, mounted integral with the rod 24, in the extension thereof, a solenoid 36 mounted wound around the magnetostrictive rod 34, a mass 38 and a spring 40 of prestressing of magnetostrictive bar 34, the prestressing spring 40 being mounted between a plug 42, which closes the end of the housing 44 of the active assembly 28 opposite the rod 24, and the mass 38.
  • the magnetostrictive bar 34 is deformed in compression.
  • the housing 44 of the active assembly 28 is mounted to move in axial translation along the axis YY 'in the second cavity 18 formed in the injector body 12.
  • the housing 44 is however elastically connected by a holding spring 30 to the body 12 of the injector 10.
  • the system 31 consisting of the active assembly 28 and the retaining spring 30 is housed in the second cavity 18 formed in the rear part of the body 12 of the injector 10.
  • An exhaust duct 32 formed in a plug 33 closing the injector body 12 makes it possible to evacuate the fuel at low pressure present in the second cavity 18 which comes from small leaks between the first cavity 16 and the second cavity 18.
  • the rod 24 is able to slide and / or to deform axially relative to the housing 44 of the active assembly 28.
  • the walls of the housing 44 have a certain elasticity. This elasticity can also be provided by an elastic washer acting on the shoulder 45 of the rod 24.
  • the mass 38 is fixed in bearing on the magnetostrictive bar 34 so as to achieve a mechanical impedance break at the interface between the magnetostrictive bar 34 and the mass 38.
  • the preload applied makes it possible, on the one hand, to seal the injection orifice formed at the end of the nozzle 14 when the injector 10 is supplied with fuel with a given pressure and, on the other hand, to catch up. possible wear in the contact zone of the closure head 26 of the rod 24 with the nozzle 14 and / or the differential expansion catch-up between the rod 24 and the injector body 12.
  • Solenoid 36 when not supplied with current, does not generate a magnetic field.
  • the magnetostrictive rod 34 is not elongated and the holding spring 30 acting on the housing 44 plates the closure head 26 on its seat so as to close the injection orifice of the injector 10.
  • the solenoid 36 When the solenoid 36 is supplied with current, for example by a current 46 (see figure 2 ), it generates a magnetic field that extends the magnetostrictive rod 34. The rod 24 is thus moved at its upper end and prints a movement at its lower end formed by the closure head 26. In some cases, the displacement of the closure head 26 of the rod 24 can be amplified, in particular if the length of the rod 24 is chosen to acoustically tune the rod 24 to the ultrasonic excitation frequency.
  • control current 46 corresponds, as shown in FIG. figure 2 , the superposition of a DC component 48 and an AC component 50, for example a sinusoidal component (see figure 2 ).
  • the elongation of the magnetostrictive rod 34 also contains a DC component and an AC component at the frequency of the AC component 50 of the control current 46.
  • the displacements of the closure head 26 of the rod 24 therefore also contain a DC component and an AC component.
  • the continuous component of the displacements of the closure head 26 of the rod 24 allows the lifting of the closure head 26 in a so-called "raised” position around which the alternating component makes it oscillate.
  • the AC component whose frequency is generally of the order of a few tens of kilohertz, mechanically splits the fuel ply so that the fuel is sprayed into fine droplets in the combustion chamber.
  • the lifting of the closure head 26 of the rod 24 relative to the seat therefore determines the average opening of the injector and therefore the average injection rate.
  • such an injector 10 allows reduced injection and / or unreliable sealing.
  • Injectors are also known where the vibrating of the rod is carried out indirectly by vibrating the nozzle by means in particular of piezoelectric ceramic elements mounted prestressed on the nozzle of the injector body.
  • the injector further comprises means for generating acoustic waves in the fuel, during the injection of fuel into the combustion chamber, to form fuel droplets of reduced size.
  • An object of the invention is therefore to provide a fuel injector for an internal combustion engine, in particular a diesel engine, intended in particular to be used in a motor vehicle, not having the aforementioned drawbacks, and notably making it possible to benefit from the continuous component of the control current of the active element while ensuring a good seal of the injector.
  • the injector 52 is of the outgoing needle head type.
  • the elements of the injector 52 according to the first embodiment of the invention are identical to the elements of the injector 10 shown in FIG. figure 1 will not be described in more detail below.
  • the injector 52 according to the first embodiment of the invention is remarkable in that it comprises means for blocking the assembly carrying the rod 28 relative to the injector body 12 and control means of the control means. blocking for selectively controlling the locking means as a function of the speed of movement of the assembly 28 carrying the rod 24.
  • the locking means of the assembly 28 carrying the rod 24 relative to the body of the injector 12 comprise a piston 54 slidably mounted in a cylinder 56, the piston 54 and the cylinder 56 defining a blocking chamber 58.
  • the piston 54 is integral with the active assembly 28 and is able to slide inside the cylinder 56 formed, in this case, by the inside of the body. injector 12.
  • the blocking chamber 58 is in fluid communication with the cavity 18.
  • this fluid communication between the blocking chamber 58 and the second upper cavity 18 is achieved by means of a small clearance between the piston 54 and the
  • the fluid communication between the blocking chamber 58 and the interior of the cavity 18 is made by means of a conduit. 60 of small passage section.
  • the blocking chamber 58 is also in fluid communication with the outside of the injector 52 by means of the discharge duct 32 of small section. It may be noted here that the evacuation of the low pressure fuel contained in the second upper cavity 18 can only be achieved through the duct 60, the blocking chamber 58 and the exhaust duct 32.
  • the spring 30 tends to oppose the lifting of the closure head 26 of the injection port 23.
  • the spring 30 thus tends to move the active assembly 28 which carries the rod 24 at a relatively high speed .
  • the piston 54 tends to be driven at high speed also, the piston 54 being integral with the active assembly 28.
  • the piston 54 tends to move in order to change the volume of the blocking chamber 58, in this case so as to reduce the volume of this blocking chamber 58.
  • the emptying of the blocking chamber 58 in fuel can be achieved through the conduit 60 and / or the exhaust duct 32 which are of small section.
  • a rapid movement of fuel between the blocking chamber 58 on the one hand, and the second cavity 18 and / or the outside of the injector, on the other hand, is prevented because of its viscosity.
  • the fuel contained in the blocking chamber 58 exerts a force on the piston 54 which opposes the movement of the piston 54 printed by the spring 30.
  • the blocking chamber 58, the cylinder 56 and the piston 54 act as locking means for the active assembly 28 carrying the rod 24.
  • the spring 30 also acts on the active assembly 28, between the injection phases, to compensate for the differential expansions.
  • the fuel contained in the hydraulic blocking chamber 58 can be evacuated through the discharge pipe 32 and / or the first pipe 60 with a low flow rate, which nevertheless allows sufficient movement of the rod 24. to compensate for the differential thermal expansion of the rod 24 and the injector body 12. Indeed, these movements of the rod 24 are much lower than those tending to cause the spring 30 during the injection phases.
  • the time available for the rod 24 to move is significantly greater than the excitation time of the rod 24 by the spring 30 during the injection phases.
  • the rod 24 is moved at a reduced speed, so that the action of the spring 30 is not prevented by the blocking chamber 58, the piston 54 and the cylinder 56.
  • the first duct 60 and the exhaust duct 32 thus form control means for the blocking means formed by the blocking chamber 58, the piston 54 and the cylinder 56, the control means selectively controlling the blocking means as a function of the speed of movement of the active assembly 28.
  • FIG. 4 On which there is shown an injector 62 according to a second embodiment of the invention, the injector 62 also being an outgoing needle injector.
  • this injector 62 does not differ significantly from the operating mode of the injector 52 according to the first embodiment of the invention.
  • FIG. 5 On which there is shown a detail 68 of a third embodiment of the injector according to the invention.
  • This third embodiment of the invention differs from the first two modes described with regard to Figures 3 and 4 in that it has check valves 70, 72 mounted in the blocking chamber 58 so as to selectively close the first conduit 60 and the exhaust pipe 32, respectively. Thanks to these nonreturn valves 70, 72, the first filling with fuel of the blocking chamber 58, prior to any commissioning of the injector according to the third embodiment of the invention, is carried out more fast compared to the first two embodiments described with regard to Figures 3 and 4 .
  • the non-return valve 72 for selectively closing off the exhaust duct 32 is preformed in the "up" position, as shown in FIG. figure 5 , so that its free end departs from the support wall of the check valve, even when it is in the closed position. In this way, the non-return valve 72 allows a low fuel leakage from the blocking chamber 58 in the exhaust duct 32.
  • the cylinder 56 integral with the injector body 12, is formed in the plug 33 closing the second upper cavity 18 formed in the injector body 12.
  • the first conduit 60 allowing the fluid communication between the blocking chamber 58 and the second upper cavity 18, is formed in the piston 54.
  • the blocking chamber 58 is in fluid communication with the outside of the injector body 12 by means of an evacuation duct of the chamber 76 distinct from the exhaust duct 32 which puts the second upper cavity 18 into fluid communication directly with the outside of the injector body 12.
  • non-return valves 70, 72 are mounted within the blocking chamber 58 to selectively block fluid communication between the blocking chamber 58 and the second upper cavity 18, or the outside of the body. injector 12, respectively.
  • this injector according to the fourth embodiment of the invention is identical to the operation of the injector, a detail of which is shown in FIG. figure 5 .
  • the blocking chamber 58 is in fluid communication with the outside of the injector body 12 by means of an exhaust duct of the chamber 76 separate from the exhaust duct 32 of the second upper cavity 18, a better evacuation of the fuel present in the second upper cavity is obtained by means of a discharge duct 32 of larger passage section. This advantageously avoids any rise in pressure in the second upper cavity 18 which could damage the injector 74 according to the invention or degrade the operation.
  • control means of the locking means comprise shutter means, in this case of the solenoid valve type 112, selectively activatable which are mounted in a single vent 32 of the blocking chamber 58. Thanks to these selectively activatable shutter means of the exhaust duct 32, the means for blocking the assembly carrying the rod are controlled very effectively, this blocking being able to be controlled during the injection phases. while the spring 30 acts on the assembly carrying the rod so as to tend to move this assembly carrying the rod at high speed.
  • the closure means of the evacuation duct are made by means of a high magnetic permeability tube delimiting the evacuation duct, a solenoid surrounded around this tube. High magnetic permeability and a soft steel valve that is pressed against the tube when the solenoid is energized.
  • an active device of the valve type can be arranged so as to close off the single exhaust duct 32 whatever the embodiment of the invention used, as long as it has a single evacuation duct. 32.

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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 (9)

  1. Kraftstoff-Einspritzdüse für einen Verbrennungsmotor, die aufweist
    - einen Einspritzdüsenkörper (12), der insbesondere eine Düse (14) bildet, die in einer Einspritzöffnung (23) endet,
    - Verschlusseinrichtungen der Einspritzöffnung (23) des Einspritzdüsenkörpers (12), wobei die Verschlusseinrichtungen eine Einheit (28) aufweisen, die eine schwingende Stange (24) trägt, welche an einem Ende in einem Verschlusskopf (26) der Einspritzöffnung (23) endet,
    - Einrichtungen zur zyklischen Versetzen der Stange (24) und/oder der Düse (14) in Längsschwingung, um die Einspritzöffnung abwechselnd zu öffnen und zu schließen,
    - Rückstelleinrichtungen (30) der Verschlusseinrichtungen in die Verschlussstellung der Einspritzöffnung (23), wobei die Rückstelleinrichtungen (30) mit der die Stange tragenden Einheit (28) zusammenwirken,
    - Blockiereinrichtungen der die Stange (24) tragenden Einheit (28) bezüglich des Körpers der Einspritzdüse (12), die einen Kolben (54) aufweisen, der in einem Zylinder (56) gleitend montiert ist, wobei der Kolben (54) und der Zylinder (56) eine erste Blockierkammer (58) definieren, die dazu bestimmt ist, mit Niederdruck-Kraftstoff gefüllt zu werden, wobei der Kolben (54) und der Zylinder (56), der eine bezüglich des Einspritzdüsenkörpers (12) und der andere bezüglich der die Stange (24) tragenden Einheit (28), ortsfest sind, und
    - Steuereinrichtungen der Blockiereinrichtungen, um die Blockiereinrichtungen abhängig von der Verschiebegeschwindigkeit der die Stange (24) tragenden Einheit (28) selektiv zu steuern,
    - einen Hohlraum (18), der von der ersten Blockierkammer (58) durch den Kolben (54) getrennt und dazu bestimmt ist, von Lecks stammenden Niederdruck-Kraftstoff zu enthalten,
    dadurch gekennzeichnet, dass die Steuereinrichtungen einen ersten Kanal (60) mit geringem Durchlassquerschnitt aufweisen, der die erste Blockierkammer (58) mit dem Hohlraum (18) in Fluidverbindung bringt.
  2. Einspritzdüse nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtungen von einer der Arten sind, die die passive Art und die aktive Art enthalten.
  3. Einspritzdüse nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der erste Kanal (60) mittels einer passgenauen Bearbeitung des Kolbens (54) bezüglich des Hohlraums (18) hergestellt wird.
  4. Einspritzdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steuereinrichtungen außerdem einen zweiten Kanal (32; 76) aufweisen, der die erste Blockierkammer mit der Außenumgebung der Einspritzdüse in Fluidverbindung bringt.
  5. Einspritzdüse nach einem der Ansprüche 3 bis 4, dadurch gekennzeichnet, dass sie Verschlusseinrichtungen des ersten Kanals (60) und/oder Verschlusseinrichtungen des zweiten Kanals (32; 76) und Steuereinrichtungen der Verschlusseinrichtungen des ersten Kanals (60) und/oder Steuereinrichtungen der Verschlusseinrichtungen des zweiten Kanals (32; 76) aufweist.
  6. Einspritzdüse nach einem der Ansprüche 3 bis 4, dadurch gekennzeichnet, dass außerdem ein Abflusskanal (32) des Hohlraums (18) vorgesehen ist, der den Hohlraum (18) direkt mit der Außenumgebung der Einspritzdüse in Fluidverbindung bringt.
  7. Einspritzdüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die erste Blockierkammer (58) mit Kraftstoff gefüllt ist.
  8. Einspritzdüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die die Stange (24) tragende Einheit (28) eine aktive Vorrichtung enthält, die insbesondere in einem fest mit der Stange (24) verbundenen Gehäuse (44) die Einrichtungen enthält, um die Stange in Schwingung zu versetzen.
  9. Einspritzdüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einrichtungen, um die Stange in Schwingung zu versetzen, einen Stapel von Elementen aufweisen, die sich so verformen können, dass sie die Düse (14) der Einspritzdüse verformen, wobei die die Stange (24) tragende Einheit (28) aus einer Masse besteht.
EP08788034A 2007-03-23 2008-03-25 Einspritzventil für verbrennungsmotor Not-in-force EP2126334B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0702132A FR2914024A1 (fr) 2007-03-23 2007-03-23 Injecteur de carburant pour moteur a combustion interne
PCT/FR2008/050507 WO2008132399A2 (fr) 2007-03-23 2008-03-25 Injecteur de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP2126334A2 EP2126334A2 (de) 2009-12-02
EP2126334B1 true EP2126334B1 (de) 2012-06-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08788034A Not-in-force EP2126334B1 (de) 2007-03-23 2008-03-25 Einspritzventil für verbrennungsmotor

Country Status (3)

Country Link
EP (1) EP2126334B1 (de)
FR (1) FR2914024A1 (de)
WO (1) WO2008132399A2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2929656A1 (fr) * 2008-04-03 2009-10-09 Renault Sas Injecteur de fluide, et procede de commande d'un tel injecteur
WO2015055553A1 (en) * 2013-10-14 2015-04-23 Continental Automotive Gmbh Injection valve
CN107138337B (zh) * 2017-07-06 2022-11-01 合肥铭传电子科技有限公司 一种微滴喷射方法及装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531652A1 (de) * 1995-08-29 1997-05-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10353641B4 (de) * 2003-11-17 2016-12-01 Robert Bosch Gmbh Brennstoffeinspritzventil
FR2888889B1 (fr) * 2005-07-20 2007-08-31 Renault Sas Dispositif d'injection de carburant pour moteur a combustion interne
FR2895031B1 (fr) * 2005-12-19 2011-06-03 Renault Sas Injecteur de carburant pour moteur a combustion interne
US7424883B2 (en) * 2006-01-23 2008-09-16 Kimberly-Clark Worldwide, Inc. Ultrasonic fuel injector

Also Published As

Publication number Publication date
FR2914024A1 (fr) 2008-09-26
EP2126334A2 (de) 2009-12-02
WO2008132399A3 (fr) 2008-12-24
WO2008132399A2 (fr) 2008-11-06

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