WO2022078925A1 - Soupape de dosage de gaz - Google Patents

Soupape de dosage de gaz Download PDF

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Publication number
WO2022078925A1
WO2022078925A1 PCT/EP2021/077982 EP2021077982W WO2022078925A1 WO 2022078925 A1 WO2022078925 A1 WO 2022078925A1 EP 2021077982 W EP2021077982 W EP 2021077982W WO 2022078925 A1 WO2022078925 A1 WO 2022078925A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
armature
valve
metering valve
sealing element
Prior art date
Application number
PCT/EP2021/077982
Other languages
German (de)
English (en)
Inventor
Daniel BOSSE
Sebastian Laechele
Gerhard Suenderhauf
Fabian FISCHER
Oezguer Tuerker
Marco Beier
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 WO2022078925A1 publication Critical patent/WO2022078925A1/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
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • F02M21/026—Lift valves, i.e. stem operated valves
    • F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle 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
    • 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
    • F02M21/0251—Details of actuators therefor
    • F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
    • 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
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • F02M21/026—Lift valves, i.e. stem operated valves
    • F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle valves
    • F02M21/0266—Hollow stem valves; Piston valves; Stems having a spherical tip
    • 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
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • F02M21/0272—Ball valves; Plate valves; Valves having deformable or flexible parts, e.g. membranes; Rotatable 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • 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
    • F02M2200/308—Fuel-injection apparatus having mechanical parts, the movement of which is damped using pneumatic 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • 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

  • the invention relates to a gas metering valve, as is used in particular to meter gaseous fuel into a combustion chamber or an intake tract of an internal combustion engine.
  • Valves for the metered delivery of gaseous fuel are known from the prior art, for example from DE 10 2016 215 027 A1.
  • a movable valve element is arranged in the housing of the gas metering valve and interacts with a valve seat to open and close a flow cross section.
  • the valve element is designed as a magnet armature and is moved with the aid of an electromagnet against the force of a return spring, so that it can be moved between a closed position and an open position by switching the electromagnet on and off.
  • valve element In order to meter gas quantities, such as are required in truck engines, for example, large flow cross-sections must be opened in order to be able to meter in the necessary gas quantity in the time available. To do this, the valve element must travel through a large stroke in a short time, which can only be achieved by strong magnetic forces and correspondingly high movement speeds of the valve element. If the valve element hits either the stroke limitation during the opening movement or the valve seat during the closing movement, large forces act there due to the high movement speed of the valve element, which leads to high mechanical stress and corresponding wear. In addition, the high forces caused strong noise emissions and vibrations, which lead to further stress on the internal combustion engine. Advantages of the Invention
  • the gas metering valve according to the invention has the advantage that the wear on the valve element is reduced and the service life is correspondingly extended, while at the same time there is a large switchable flow cross section.
  • the gas metering valve has a housing in which a gas chamber with a gas inlet and a gas outlet is formed.
  • a valve element is movably arranged in the gas chamber and interacts with a valve seat to open and close the inlet opening, the valve element being movable by means of an actuator.
  • the valve element comprises a sealing element and an armature element, the sealing element having a sealing surface which interacts with the valve seat and an armature element which is moved by the actuator.
  • the sealing element is coupled to the anchor element via an anchor spring.
  • the two parts of the valve element can be moved in opposite directions thanks to the flexible coupling via the armature spring, so that when the valve element hits the valve seat or the stop surface that limits the opening movement, part of the valve element is not braked abruptly, but against each other the force of the armature spring can move a little further, which reduces the forces on the corresponding surfaces and the valve element and thus reduces wear.
  • a driver is formed between the sealing element and the anchor element, so that the anchor element moves the sealing element with it during its opening movement.
  • the driver ensures that the valve element opens without delay when the electromagnet is energized, so that the metering valve can be opened precisely and the gas metered can be controlled precisely without the damping function being impaired by the two-part design of the valve element.
  • a damping space is formed between the anchor element and the sealing element.
  • the damping chamber is filled with the gas to be metered, which is displaced from the damping chamber when the valve element hits the valve seat or the stroke limiter, thereby dampening the movement of the two valve element parts and further increasing the above-mentioned advantages of the structure.
  • This can advantageously a connection to the gas space can be provided via a bore in the anchor element or in the sealing element.
  • the bore can also be designed as a throttle bore, so that the gas in the damping chamber is only displaced relatively slowly from the damping chamber, which further increases the damping effect.
  • the armature spring is prestressed, so that the sealing element and the armature element are prestressed against one another in the driver.
  • the damping effect and the bouncing tendency of the valve element can be adjusted via the strength of the pretension.
  • the actuator is designed as an electromagnet which, when energized, moves the armature element against the force of a restoring spring.
  • the anchor element can be designed as a plunger, for example, which is structurally simple to implement.
  • the restoring spring exerts a lower force on the armature element than the armature spring.
  • a contact surface is formed on the anchor element, with which the anchor element can come into contact with the sealing element, with a damping element being applied to the contact surface.
  • This can advantageously be made of an elastomer. The impact of the two valve element parts on one another is damped by the damping element, which in particular dampens the noise emissions.
  • FIG. 1 shows a longitudinal section through a first exemplary embodiment of a gas metering valve according to the invention
  • FIG. 2 shows an enlarged view of the detail II of FIG. 1,
  • FIG. 3 shows a schematic representation of a valve element according to the invention of a further embodiment
  • 5a, 5b, 5c and 5d illustrate the opening stroke of valve elements according to the invention.
  • a gas metering valve according to the invention is shown in longitudinal section.
  • the gas metering valve comprises a housing 1 in which a gas chamber 2 is formed.
  • the gas space 2 can be filled with the gas to be dosed via a gas inlet 4 , which exits via a gas outlet 5 .
  • the gas outlet 5 is designed in the form of a tube that protrudes into the intake tract or the combustion chamber of an internal combustion engine.
  • a valve element 7 is arranged to be longitudinally movable.
  • valve seat 10 annularly covering the mouth of the gas inlet 4 into the gas space 2 surrounds.
  • the longitudinal movement of the valve element 7 in the direction of the gas outlet 5 is limited by a stop surface 16 which is formed on the wall of the gas space 2 .
  • the valve element 7 is designed in two parts and comprises a sealing element 11 and an armature element 12.
  • the sealing surface 14 is formed on the sealing element 11, while the armature element 12 is formed as a magnetic armature and interacts with an electromagnet 8, 9, which comprises a magnetic coil and a magnetic core. which are shown in more detail in FIG.
  • a connection 13 is formed in the anchor element 12 in the form of a T-shaped bore through which the gas can flow in the direction of the gas outlet 5 .
  • the valve element 7 is by a restoring spring 22, which is arranged between the valve element 7 and a shoulder 24 in the gas chamber 2 under pressure bias, with a closing force in Direction of the valve seat 10 is applied, so that the valve element 7 closes the inlet opening 4 when the electromagnet 8 is not energized.
  • FIG. 2 shows an enlarged view of the section of FIG. 1 marked II.
  • a driver 17 is formed between the anchor element 12 and the sealing element 11 by a collar pointing inward on the sealing element 11 and encompassing a collar pointing outward on the anchor element 12 .
  • a damping chamber 18 is formed between the anchor element 12 and the sealing element 11 and is connected to the gas chamber 2 via a bore 20 .
  • the outwardly directed collar on the anchor element 12 is fitted into the sealing element 11 to such an extent that the gas exchange between the gas chamber 2 and the throttle chamber 18 is dominated by this bore 20 .
  • the damping effect can be adjusted by the size of the bore 20 by designing it with a small diameter and thus with a throttling effect.
  • the function is as follows: The valve element 7 is moved with the aid of the electromagnet 8 in the gas chamber 2 against the force of the return spring 22 in order to open and close a flow cross-section for the gas to be metered. If the gas metering valve is to open and close a large flow cross section, as is necessary for metering in high-performance internal combustion engines, the valve element 7 must travel through a relatively large stroke. In addition, the switching of the gas metering valve must take place quickly, since this is the only way to achieve precise metering, which is particularly necessary when the gas is injected directly into a combustion chamber of an internal combustion engine.
  • Both requirements can only be met by applying large forces to the valve element 7 in order to accelerate it in a short time and move it into its open position against the force of the return spring 22 .
  • the closing movement takes place passively by the Return spring 22 when the electromagnet 8 is switched off. Since this also has to happen quickly, the return spring 22 is mounted with a relatively large prestressing force. If the valve element 7 hits the stop surface 16 during the opening movement, correspondingly large forces act on the housing 1 and the valve element 7. Bouncing can also occur, i.e. the valve element 7 can be pushed off the stop surface 16 or from the valve seat 10 bounces back, so that the valve element 7 only comes to rest in this position after a certain time.
  • the two-part design of the valve element 7 ultimately results in damping of the movement, which is further intensified by the design of the damping space 18 .
  • the closing movement of the valve element 7 is considered: If during the closing movement of the valve element 7 the sealing element 11 comes into contact with its sealing surface 14 on the valve seat 10, the armature element 12 initially continues its movement against the prestressed armature spring 15. The gaseous fuel in the damping chamber 18 is pressed out through the bore 20, which slows down the movement of the valve element 7 and thus dampens it. At the same time, this damping reduces the tendency of the valve element 7 to bounce. The armature spring 15 then pushes back the armature element 12, with the armature spring 15 exerting a greater force on the armature element 12 than the return spring 22.
  • a force is exerted on the armature element 12 by energizing the electromagnet 8 and this is pulled away from the valve seat 10 .
  • the driver 17 also moves the sealing element 11 away from the valve seat 10 and opens the inlet opening 4 . If the anchor element 12 comes into contact with the stop surface 16, the sealing element 11—like the anchor element 12 during the closing movement—first continues its movement, with this movement being damped analogously to the closing movement.
  • FIG. 3 an alternative embodiment of the valve element 7 is shown. Instead of a bore 20, which runs in the center of anchor element 12 in FIG. The diameter of the bores 20' is also small here and accordingly has a throttling effect.
  • Fig. 4a shows a further exemplary embodiment of a valve element 7 according to the invention.
  • the sealing element 11 and the armature element 12 are not connected here by a driver 17, but exclusively via the armature spring 15.
  • the armature element 12 When the armature element 12 is driven by the electromagnet 8, it moves in the opening direction from the valve seat 10 away, the sealing element 11 follows with a time delay, since it is only moved in the opening direction by the gas pressure in the gas inlet 4 when the spring force of the armature spring 15 decreases and thus follows the armature element 12 .
  • the surface on the anchor element 12 facing the sealing element 11 is designed as a contact surface 19 , with a damping element 23 being applied to the contact surface 19 .
  • the sealing element 11 and the armature element 12 can touch at the contact surface 19 during the opening or closing movement, which is dampened by the damping element 23 and reduces the forces that occur.
  • FIG. 4b shows the same damping element 23 with a valve element 7 as already shown in FIG.
  • a bore 20 is provided here with a relatively large diameter, as a result of which the pneumatic damping effect is eliminated and only the damping element 23 provides damping.
  • the exemplary embodiment of FIG. 4b corresponds to FIG. 4a, but additionally has the driver.
  • FIG. 4c shows the exemplary embodiment of the valve element 7 already shown in FIG. 2 with the arrangement of the damping element 23, the bore 20 being designed here as a damping bore.
  • the damping elements 23 of the exemplary embodiments according to FIGS. 4b and 4c have perforations, not shown in the drawing, for example in the form of recesses in the area of the bores 20, in order to enable gas exchange between the damping volume 18 and the environment via the bores 20.
  • the stroke of the valve element 7 is determined by the springs, ie the armature spring 15 and the return spring 22, and by the pressure conditions during operation of the gas metering valve.
  • FIG. 5a shows the valve element 7 in the opening stroke stop, in which the armature element 12 is in contact with the stop surface 16.
  • FIG. 5a shows the valve element 7 in the opening stroke stop, in which the armature element 12 is in contact with the stop surface 16.
  • FIG. The position of the sealing element 11 is then on the one hand by the Spring 15, so the spring constant and bias, set, and on the other hand by the pressure conditions of the flowing gas.
  • the stroke varies accordingly, which is shown in FIG. 5a by two possible positions of the sealing element 11, which correspond to strokes h1 and h2.
  • the position of the armature element 12 is also dependent on the pressure conditions, with pressure equalization within the gas space 2 generally prevailing here.
  • the driver 17 ensures that both parts of the valve element 7 move synchronously and the two parts of the valve element 7 (sealing element 11 and armature element 12) only move when they are placed on the valve seat 10 or the Briefly move stop surface 16 against each other.
  • This conflict of objectives is largely resolved by the damping chamber 18, so that the valve element 7 formed in this way has both a low tendency to bounce and a low seat load.

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)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne une soupape de dosage de gaz permettant la distribution dosée d'un combustible gazeux, la soupape comprenant une enveloppe (1) dans laquelle une chambre à gaz (2), munie d'une entrée de gaz (4) et d'une sortie de gaz (5), est formée. Un élément (7) de soupape est monté mobile dans la chambre à gaz (2) et il interagit avec un siège (10) de soupape pour ouvrir et fermer l'ouverture d'entrée (4), l'élément (7) de soupape pouvant être déplacé au moyen d'un actionneur (8). L'élément (7) de soupape comprend un élément d'étanchéité (11) et un élément d'ancrage (12). L'élément d'étanchéité (11) comporte une face d'étanchéité (14) destinée à interagir avec le siège (10) de soupape et l'élément d'étanchéité (11) est accouplé à l'élément d'ancrage (12) par l'intermédiaire d'un ressort d'armature (15).
PCT/EP2021/077982 2020-10-14 2021-10-11 Soupape de dosage de gaz WO2022078925A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020212935.5 2020-10-14
DE102020212935.5A DE102020212935A1 (de) 2020-10-14 2020-10-14 Gasdosierventil

Publications (1)

Publication Number Publication Date
WO2022078925A1 true WO2022078925A1 (fr) 2022-04-21

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ID=78212094

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Application Number Title Priority Date Filing Date
PCT/EP2021/077982 WO2022078925A1 (fr) 2020-10-14 2021-10-11 Soupape de dosage de gaz

Country Status (2)

Country Link
DE (1) DE102020212935A1 (fr)
WO (1) WO2022078925A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843862A1 (de) * 1988-12-24 1990-06-28 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
US20070175519A1 (en) * 2006-02-01 2007-08-02 Motoharu Moriya Injector valve in injector for gas fuel
EP2236811A1 (fr) * 2009-03-25 2010-10-06 Continental Automotive GmbH Soupape d'injection
DE102012210424A1 (de) * 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
US20140224903A1 (en) * 2011-09-20 2014-08-14 Denso Corporation Fuel injector and method for manufacturing fuel injector
DE102015226455A1 (de) * 2015-12-22 2017-06-22 Robert Bosch Gmbh Gasinjektor mit gelenkigem Ventilglied
DE102016215027A1 (de) 2016-08-11 2018-02-15 Robert Bosch Gmbh Brennstoffzellenvorrichtung
DE102016220326A1 (de) * 2016-10-18 2018-04-19 Robert Bosch Gmbh Ventil zum Zumessen eines gasförmigen oder flüssigen Kraftstoffs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843862A1 (de) * 1988-12-24 1990-06-28 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
US20070175519A1 (en) * 2006-02-01 2007-08-02 Motoharu Moriya Injector valve in injector for gas fuel
EP2236811A1 (fr) * 2009-03-25 2010-10-06 Continental Automotive GmbH Soupape d'injection
US20140224903A1 (en) * 2011-09-20 2014-08-14 Denso Corporation Fuel injector and method for manufacturing fuel injector
DE102012210424A1 (de) * 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
DE102015226455A1 (de) * 2015-12-22 2017-06-22 Robert Bosch Gmbh Gasinjektor mit gelenkigem Ventilglied
DE102016215027A1 (de) 2016-08-11 2018-02-15 Robert Bosch Gmbh Brennstoffzellenvorrichtung
DE102016220326A1 (de) * 2016-10-18 2018-04-19 Robert Bosch Gmbh Ventil zum Zumessen eines gasförmigen oder flüssigen Kraftstoffs

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DE102020212935A1 (de) 2022-04-14

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