WO2018082866A1 - Injecteur de carburant pour injecter un carburant gazeux et/ou liquide - Google Patents

Injecteur de carburant pour injecter un carburant gazeux et/ou liquide Download PDF

Info

Publication number
WO2018082866A1
WO2018082866A1 PCT/EP2017/075592 EP2017075592W WO2018082866A1 WO 2018082866 A1 WO2018082866 A1 WO 2018082866A1 EP 2017075592 W EP2017075592 W EP 2017075592W WO 2018082866 A1 WO2018082866 A1 WO 2018082866A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve member
control chamber
fuel injection
actuator
Prior art date
Application number
PCT/EP2017/075592
Other languages
German (de)
English (en)
Inventor
Benedikt Leibssle
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 WO2018082866A1 publication Critical patent/WO2018082866A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • 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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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
    • F02M45/04—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 with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • Fuel injection valve for injecting a gaseous and / or liquid fuel
  • the invention relates to a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine having the features of the preamble of claim 1.
  • fuel injection valves are also known as Doppelbrennstoffinjektoren, Zweistoffinjektoren or dual-fuel injectors.
  • Fuel injection valves of the aforementioned type generally have two liftable nozzle needles which are guided in one another for the purpose of releasing and closing
  • German Offenlegungsschrift DE 10 2014 225 167 A1 discloses a fuel metering valve for an internal combustion engine having a housing in which a nozzle needle is arranged so as to be longitudinally displaceable and cooperates with a sealing seat formed in the housing.
  • a gas space is further formed, which surrounds the nozzle needle in sections and which can be connected by opening the sealing seat with at least one injection opening.
  • a fillable with liquid fuel space is present, which faces away from the gas chamber surrounding the nozzle needle.
  • a leakage of the liquid fuel into the gas space via a leakage gap is allowed, so that When the nozzle needle is opened, gas flows from the gas space via the injection openings into a combustion space and entrains the liquid fuel present within the gas space.
  • the leakage gap is dimensioned such that the injection of the gaseous fuel such an amount of liquid fuel into the combustion chamber, that the ignitability of the mixture is raised to the desired level.
  • a further nozzle needle is provided, which is guided in a bore of the first nozzle needle for releasing and closing at least one further injection opening in a liftable manner.
  • a control valve is provided in each case, so that the structure of the fuel metering valve is no less complex than in a conventional dual-fuel injector.
  • the present invention has for its object to provide a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine, which is less complex and thus easy and inexpensive to produce.
  • the proposed for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine fuel injector comprises a hub in a central bore of a nozzle body liftably received first valve member and a liftable in a central bore of the first valve member second valve member.
  • Each valve member is associated with a control chamber, which can be acted upon via an inlet throttle with liquid fuel and each relieved via a valve.
  • the valves are connected in series and only one actuator is provided for actuating both valves.
  • the fact that only one actuator is provided reduces the number of parts. That is, the manufacturing and assembly costs decrease, with respect to the fuel injection valve and in Reference to the connection of the fuel injection valve to a power supply and / or to a motor control.
  • the elimination of an actuator also allows a particularly compact design of the fuel injector.
  • a time-delayed opening of the valve members can be effected with only one actuator, for example, to realize a pilot injection with liquid fuel and a subsequent main injection with gaseous fuel.
  • only one valve can be actuated directly via the actuator, wherein it is preferably the valve that serves to relieve the pressure associated with the second valve member control chamber.
  • the second valve member therefore preferably opens first in order to realize in particular a pilot injection with liquid fuel.
  • the control lines between this valve and the control chamber can be kept short because the second valve member - at a corresponding length - can be performed close to the valve or to the actuator. This has a favorable effect on the Abêtmenge and thus on the valve requirements, so that a correspondingly small-sized valve can be used.
  • valve which serves to relieve the pressure associated with the first valve member control chamber is advantageously controlled by the valve, which is actuated directly via the actuator. This is possible because in the fuel injection valve according to the invention both valves are connected in series. In this way, a cascade-like control is achieved, which allows a time-delayed opening of the two valve members.
  • the directly operable via the actuator valve comprises a cooperating with a valve seat closing element, wherein in the valve seat, a drain channel opens with a discharge throttle arranged therein, via which the second valve member associated control chamber is relieved.
  • the opening behavior of the second valve member can be determined.
  • the valve can be very simple.
  • the valve that can be actuated directly via the actuator can be a 2/2-way valve. If the valve opens, liquid fuel flows out of the control chamber via the outlet channel and the outlet throttle, while liquid fuel flows in via the inlet throttle.
  • the ratio of the throttle cross sections to each other, the opening of the associated valve member must be ensured.
  • the valve may be formed, for example, as a simple ball seat valve.
  • the directly operable via the actuator valve can be a 3/2 -way valve.
  • the closing element of the valve cooperates with a further valve seat, via which preferably the inlet throttle is releasable and closable. If the valve opens, the drainage channel or the outlet throttle is released and the inlet throttle is closed. This means that no liquid fuel can flow via the inlet throttle. In this way, the Abêtmenge be limited.
  • control chamber associated with the second valve member is connected to a further control chamber which is delimited by an actuating element of the further valve which serves to relieve the control chamber associated with the first valve member.
  • control chambers There are thus at least three control chambers available, wherein the first and the second control chamber are associated with the first and the second valve member and wherein the third control chamber of the control of the subsequent valve is used, which can not be actuated directly via the actuator.
  • the actuation of the further valve is coupled in this way to that of the directly actuatable via the actuator valve, so that a second
  • Actuator can be omitted. If the valve which can be actuated directly via the actuator is designed as a 2/2-way valve, the opening time of the further valve can be determined via the ratio of the throttle cross-sections of inlet and outlet throttle.
  • the second valve member on the control chamber a movable stop body is opposite, which is acted upon in the direction of the second valve member by the spring force of a spring.
  • the stopper body causes a two-stage opening of the second valve member when the second valve member associated control chamber is relieved. In a first stage, the control pressure in the control chamber drops to a first pressure level and the second valve member moves in the direction of the stop body until it abuts against the stop body.
  • the control pressure drops again, namely to a second pressure level, which is dependent on the ratio of the throttle cross-sections of inlet and outlet throttle in the case of a direct operated valve designed as a 2/2 -way valve.
  • a second pressure level which is dependent on the ratio of the throttle cross-sections of inlet and outlet throttle in the case of a direct operated valve designed as a 2/2 -way valve.
  • the further valve which serves to relieve the pressure associated with the first valve member control chamber, preferably comprises a closing element which cooperates with a valve seat, in which a drain channel opens with an outlet throttle formed therein to relieve the control valve associated with the first valve member.
  • the valve can therefore be designed similar to the first, directly operable valve and is just as easy to implement.
  • the closing element may in particular be spherical.
  • a spherical closing element can be particularly easily guided by an actuating element.
  • the actuating element is rod-shaped, so that it can be used to bridge a distance between the first valve member and the actuator. In this way, the control lines can be kept short.
  • the further valve which serves to relieve the pressure associated with the first valve member control chamber, for example, a 2/2-way valve, in particular a ball seat valve, be.
  • the valve can also be designed as a 3/2 -way valve.
  • both valve members of the fuel injection valve are axially biased in each case via a spring in the direction of a sealing seat. This means that the actuator is used to open the fuel injection valve or energized. The provision of the valve members in their respective sealing seats via the spring force of the springs.
  • the actuator is a magnetic actuator or a piezoelectric actuator.
  • Such actuators are known for use in a fuel injection valve, so that can be used thereon.
  • Fig. 1 is a schematic longitudinal section through an inventive fuel injection valve
  • FIG. 2 is an enlarged detail of Fig. 1. Detailed Description of the drawings
  • the fuel injection valve shown in FIG. 1 for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine comprises a nozzle body 2 with a central bore 1, in which a first valve member 3 is received in a liftable manner.
  • the first valve member 3 also has a central bore 4.
  • a second valve member 5 is guided hubbeweglich.
  • the central bore 4 of the first valve member 3 can be acted upon with liquid fuel and the central bore 1 of the nozzle body 2 can be acted upon with gaseous fuel. Accordingly, the gaseous fuel can be introduced into the combustion chamber via a stroke movement of the first valve member 3, while the injection of the liquid fuel is effected via a stroke movement of the second valve member 5.
  • the first valve member 3 cooperates with a first sealing seat 27, which is formed by the nozzle body 2. Lift the first valve member 3 from the sealing seat 27, there it injection openings (not shown) free, over which the gaseous fuel is introduced into the combustion chamber.
  • the second valve member 5 cooperates with a sealing seat 28 which is formed in the first valve member 3. If the second valve member 5 lifts off from the sealing seat 28, injection openings (not shown) formed in the first valve member 3 are released for the injection of the liquid fuel.
  • Each valve member 3, 5 is associated with a control chamber 6, 7, wherein each control chamber 6, 7 can be acted upon via an inlet throttle 8, 9 with liquid fuel and a valve 10, 11 relieved.
  • the control pressure in the respective control chamber 6, 7 and the associated valve member 3, 5 can against the spring force of a spring 25, 26, by means of which the valve member 3, 5 is axially biased against the sealing seat 27, 28 to open.
  • the springs 25, 26 are received in a spring chamber 30 which is formed in a body member 31.
  • the springs 25, 26 are arranged coaxially and surround a protruding into the spring chamber 30 end portion of the second or inner valve member 5.
  • the spring 26 is on the one hand indirectly via a spring plate 34 to an annular collar 35 of the second and inner valve member 5 and on the other the body member 31 supported.
  • the further spring 25 is indirectly supported by a collar sleeve 36 on the first and outer valve member 3, wherein the collar sleeve 36 is passed through a throttle plate 29 which is disposed between the nozzle body 2 and the body member 31.
  • the nozzle body 2, the throttle plate 29, the body member 31 and another body member 32, in which, inter alia, an actuator 12 is arranged, are axially braced by means of a nozzle lock nut 33.
  • the actuator 12 is presently designed as a magnetic actuator and comprises a magnetic coil 37 for acting on an armature 38.
  • the armature 38 is axially biased by an armature spring 39.
  • the armature 38 can be coupled with a spherical closing element 14 of the valve 11, which serves to relieve the pressure associated with the second valve member 5 control chamber 7.
  • the spherical closing element 14 acts together with a valve seat 13, in which a connected to the control chamber 7 drain channel 15 opens (see also Fig. 2).
  • the actuator 12 is energized, so that a magnetic field is built up whose magnetic force moves the armature 38 in the direction of the magnetic coil 37.
  • the closing element 14 of the valve 11 is relieved and the valve 11 opens.
  • the valve 11 When the valve 11 is open, liquid fuel flows out of the control chamber 7 via an outlet channel 15, which opens into the valve seat 13 of the valve 11, with the result that the control pressure in the control chamber 7 drops and the inner valve member 5 assigned to the control chamber 7 is opened can.
  • the inner valve member 5 moves in the direction of a stop member 19 which is opposite to the valve member 5 on the control chamber 7. By striking the inner valve member 5 on the stopper body 19, the pressure in the control chamber 7 continues to decrease to a second pressure level.
  • the two valve members 3, 5 are designed such that with the lifting movement of the outer valve member 3, the inner valve member 5 closes.
  • the opening and closing of the two valve members 3, 5 is thus temporally offset from one another to realize, for example, before the main injection with gaseous fuel, a pilot injection with liquid fuel. Since serving as a stop for the inner valve member 5 stop body 19 is movable, this can be suppressed due to the greater opening force of the outer valve member 5 against the spring force of a spring 20. This allows a stroke of the outer valve member 3 which is larger than that of the inner valve member 5.
  • the throttle plate 29 can be used as a stroke stop.
  • the directly operable via the actuator 12 valve 11 is closed.
  • the valve 10 closes. This leads to a buildup of pressure in the control chamber 6, which causes the outer valve member 3 is placed back in its sealing seat 27.
  • the inner valve member 5 and the stopper body 19 follow the movement of the outer valve member 3 until the stopper body 19 strikes the body member 31 and disengages from the inner valve member 5.
  • the control chamber 7 is further filled, so that only the inner valve member 5 follows the outer valve member 3 to the sealing seat 27.
  • an outlet throttle 16, 24 is formed in the flow channels 15, 23 in each case.
  • On the ratio of the throttle cross-sections of the flow control valve 7 connected to the outlet throttle 16 and the inlet throttle 9 can be taken in particular influence on the second lowered pressure level and thus on the time-staggered opening of the outer valve member 3.
  • the valve 11 can be designed as a 3/2 -way valve (not shown), so that when the valve 11 is opened, the inlet throttle 9 is purposefully closed. In this way, the pressure in the control chamber 17 can be reduced to the pressure level of the drain system, so that a pressure reduction is achieved, which differs significantly from a first lowered pressure level.
  • the 3/2-way valve also has the advantage of a reduced Abêtmenge, since the inlet throttle 9 is closed when the valve 11 is open and no liquid fuel is able to flow into the control chamber 7.
  • valve 10 can be designed as a 3/2 -way valve (not shown) in order to reduce the Abêtmenge.
  • valves 10, 11 are designed as a ball seat valve according to FIGS. 1 and 2.
  • the control concept according to the invention can also be realized by means of other valve types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un injecteur de carburant pour injecter un carburant gazeux et/ou liquide dans une chambre de combustion d'un moteur à combustion interne, comprenant un premier élément d'injecteur (3) reçu pour pouvoir effectuer un mouvement alternatif dans un orifice central (1) d'un corps de buse (2), et un second élément d'injecteur (5) reçu pour pouvoir effectuer un mouvement alternatif dans un orifice central (4) du premier élément d'injecteur (3). Une chambre de commande (6, 7) qui peut recevoir du carburant liquide par l'intermédiaire d'un restricteur (8, 9) et qui peut être déchargée par l'intermédiaire d'une soupape (10, 11), est associée à chaque élément d'injecteur (3, 5). Selon l'invention, les soupapes (10, 11) sont disposées en série et un seul actionneur (12) assure l'actionnement des soupapes (10, 11).
PCT/EP2017/075592 2016-11-03 2017-10-09 Injecteur de carburant pour injecter un carburant gazeux et/ou liquide WO2018082866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016221543.4 2016-11-03
DE102016221543.4A DE102016221543A1 (de) 2016-11-03 2016-11-03 Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs

Publications (1)

Publication Number Publication Date
WO2018082866A1 true WO2018082866A1 (fr) 2018-05-11

Family

ID=60037615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/075592 WO2018082866A1 (fr) 2016-11-03 2017-10-09 Injecteur de carburant pour injecter un carburant gazeux et/ou liquide

Country Status (2)

Country Link
DE (1) DE102016221543A1 (fr)
WO (1) WO2018082866A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019219441A1 (de) 2019-01-31 2020-08-06 Robert Bosch Gmbh Zweistoffinjektor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856713A (en) * 1988-08-04 1989-08-15 Energy Conservation Innovations, Inc. Dual-fuel injector
WO1998051925A1 (fr) * 1997-05-09 1998-11-19 Westport Innovations Inc. Injecteur de carburant gazeux ou bicarburant a commande hydraulique
DE10309387A1 (de) * 2002-03-05 2003-09-18 Denso Corp Kraftstoffeinspritzvorrichtung
US20130081593A1 (en) * 2011-09-30 2013-04-04 Caterpillar, Inc. Single Actuator Fuel Injector for Dual Fuels
DE102014225167A1 (de) 2014-12-08 2016-06-09 Robert Bosch Gmbh Kraftstoffzumessventil für eine Brennkraftmaschine und Verfahren zum Betreiben desselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856713A (en) * 1988-08-04 1989-08-15 Energy Conservation Innovations, Inc. Dual-fuel injector
WO1998051925A1 (fr) * 1997-05-09 1998-11-19 Westport Innovations Inc. Injecteur de carburant gazeux ou bicarburant a commande hydraulique
DE10309387A1 (de) * 2002-03-05 2003-09-18 Denso Corp Kraftstoffeinspritzvorrichtung
US20130081593A1 (en) * 2011-09-30 2013-04-04 Caterpillar, Inc. Single Actuator Fuel Injector for Dual Fuels
DE102014225167A1 (de) 2014-12-08 2016-06-09 Robert Bosch Gmbh Kraftstoffzumessventil für eine Brennkraftmaschine und Verfahren zum Betreiben desselben

Also Published As

Publication number Publication date
DE102016221543A1 (de) 2018-05-03

Similar Documents

Publication Publication Date Title
EP3535486B1 (fr) Soupape d'injection de carburant pour injecter un carburant gazeux et / ou liquide
EP2102486B1 (fr) Injecteur avec une soupape de commande à compensation de pression axiale
EP3478957B1 (fr) Soupape d'injection d'un carburant gazeux
DE102010028835A1 (de) Kraftstoffinjektor
WO2008061844A1 (fr) Injecteur de carburant
EP2310662B1 (fr) Injecteur de carburant
WO2008049699A1 (fr) Injecteur de carburant
WO2008049671A1 (fr) Injecteur de carburant
DE10100390A1 (de) Einspritzventil
WO2001027463A1 (fr) Injecteur pour systeme d'injection de carburant pour moteurs a combustion interne, muni d'un pointeau faisant saillie dans la chambre de commande de soupape
WO2018082866A1 (fr) Injecteur de carburant pour injecter un carburant gazeux et/ou liquide
WO2017202542A1 (fr) Soupape à gaz pour doser des carburants gazeux
DE19936943A1 (de) Brennstoffeinspritzventil
DE102010042251A1 (de) Kraftstoffinjektor für eine Brennkraftmaschine
DE102010030429A1 (de) Injektor, insbesondere Common-Rail-Injektor
DE102015223445A1 (de) Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs
EP1961953A1 (fr) Soupape à plusieurs voies
WO2001096734A1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
DE102007018005A1 (de) Injektor
DE102006021738A1 (de) Magnetventil für einen Kraftstoffinjektor mit optimiertem Ventilhub
DE102014211469A1 (de) Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor
WO2016058969A1 (fr) Soupape d'injection servant à injecter un fluide dans la chambre de combustion d'un moteur a combustion interne
DE102021205990A1 (de) Absperrventil für Wasserstofftanksysteme, Druckgasbehälter sowie Wasserstofftanksystem
EP2084390A1 (fr) Injecteur avec une soupape de commande à compensation de pression axiale
DE102017200546A1 (de) Schaltventil für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17780743

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17780743

Country of ref document: EP

Kind code of ref document: A1