EP4097346A1 - Gasdosierventil für brennkraftmaschinen - Google Patents
Gasdosierventil für brennkraftmaschinenInfo
- Publication number
- EP4097346A1 EP4097346A1 EP21703170.7A EP21703170A EP4097346A1 EP 4097346 A1 EP4097346 A1 EP 4097346A1 EP 21703170 A EP21703170 A EP 21703170A EP 4097346 A1 EP4097346 A1 EP 4097346A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- gas
- gas metering
- closing
- metering valve
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims description 40
- 238000013016 damping Methods 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 96
- 239000000446 fuel Substances 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 206010016754 Flashback Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
-
- 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
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief 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
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
-
- 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
-
- 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
- F02M21/0257—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
- F02M21/0269—Outwardly opening valves, e.g. poppet 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
- F02M21/0257—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
- 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
- F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
-
- 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
- F02M21/0293—Safety devices; Fail-safe measures
-
- 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 it is preferably used to meter gaseous fuel directly into a combustion chamber of an internal combustion engine.
- Gas valves for metered metering of gases are known from the prior art.
- DE 10 2016215 027 A1 shows a gas valve that is part of a recirculation device of a fuel cell arrangement.
- the gas valve comprises a movable valve element which is movable against the force of a spring element by an electromagnet within the gas valve and thereby opens and closes an inlet opening.
- the gas flow is passed through bores within the valve element and thus arrives at an outlet opening, the valve element being guided inside the gas valve on its outside.
- the electromagnet on and off the gas to be metered can be fed to the fuel cell at the desired time and in the required amount. Excessive thermal stress on the sealing seat on the valve element is not to be expected in this application.
- the gas metering valve according to the invention with the features of the independent claim has the advantage that the thermal load on the sealing seat is reduced and reliable sealing of the gas to be metered between the individual injections and when the internal combustion engine is switched off is guaranteed.
- the gas metering valve has a housing in which a gas space is formed which has an inlet opening and an outlet opening.
- a movable valve element is arranged in the gas space, which can be moved by an electrical actuator against the force of a return spring and which interacts with a sealing seat for opening and closing the inlet opening.
- a shut-off valve is arranged between the valve element and the outlet opening, which can additionally interrupt the gas flow to the outlet opening.
- the valve element is opened by the electrical actuator, for example an electromagnet.
- the gas flowing in through the inlet opening leads to a pressure increase upstream of the shut-off valve, which opens the shut-off valve.
- the gas passes the shut-off valve and finally enters the combustion chamber.
- the combustion in the combustion chamber is ignited, with the flame front also spreading in the direction of the gas metering valve.
- the shut-off valve also closes immediately after the inlet opening of the gas metering valve is closed, the flame front in the combustion chamber can only spread as far as the shut-off valve, and the sealing seat of the valve element is effectively protected.
- the sudden increase in pressure in the combustion chamber as a result of the combustion also helps to close the shut-off valve. Since the valve seat is protected from high temperatures, an elastic seal, for example an elastomer seal, can be used there, which is particularly advantageous in the case of hydrogen.
- an elastic seal for example an elastomer seal
- the check valve comprises a movable closing element loaded by a closing spring, which is preferably guided longitudinally in the gas space.
- a closing spring which is preferably guided longitudinally in the gas space.
- the closing element can be plate-shaped, which on the one hand is a simple, easy-to-manufacture shape and on the other hand controls a large flow cross-section with a longitudinal movement perpendicular to the plane of the plate even with a small stroke. This means that the unavoidable throttling at the shut-off valve can be kept low, so that the full gas pressure is available to inject the gaseous fuel.
- the restoring spring which acts on the valve element in the closing direction, is supported with its other end on the closing element.
- a pressure pin is formed on the valve element, which comes into contact with the closing element when the valve element opens and thus exerts an opening force on the closing element, that is to say opens the shut-off valve.
- the shut-off valve is opened not only by the pressure difference in front of and behind the closing element, but also by the movement of the valve element. This shortens the response time of the gas metering valve, i.e. the time that passes between the activation of the electrical actuator and the actual outflow of the gaseous fuel.
- the valve element interacts with a valve seat in the gas space to close the inlet opening.
- an elastic sealing element is advantageously arranged on the valve sealing surface of the valve element or on the valve seat.
- the inlet opening can be closed very tightly by the elastic sealing element, which in particular when metering gaseous hydrogen is important so that no undesired leakage occurs at the valve seat.
- hydrogen for safety reasons it is essential that the valve seat is completely tight when the engine is switched off. Even if the engine, which is installed in a commercial vehicle, for example, is not used for a long time, no hydrogen may collect outside the engine and could be ignited there.
- a bite edge can also be provided on the valve seat in an advantageous manner. This increases the surface pressure in this area, which further improves the seal.
- a circumferential ring burr can be provided on the valve element. This can surround the bite edge and its height is dimensioned so that when the valve element closes, the elastic sealing element first comes to rest on the valve seat and then the ring burr. Thus, a minimum distance between the valve sealing surface and the valve seat is defined by the ring ridge so as not to overuse the elastic sealing element.
- the shut-off valve comprises a valve needle, which here serves as a closing element. This is arranged longitudinally movable in the gas space and prevents the backflow of gas into the gas space.
- a valve seat is formed on the end of the valve needle facing the outlet opening, with which the valve needle interacts with a corresponding sealing surface.
- the valve needle is preferably pretensioned in the direction of this sealing surface by a closing spring.
- a pressure pin is formed on the valve element, which comes into contact with the valve needle during the opening movement of the valve element and thereby exerts an opening force on it.
- the shut-off valve is opened together with the valve element.
- Figure 1 is a longitudinal section through a first embodiment of a gas metering valve according to the invention
- FIG. 2 shows the detail marked II in FIG. 1 in an enlarged representation
- FIG. 3 shows another embodiment of the invention, the gas metering valve is only shown schematically here,
- Figure 4a, 4b and 4c further embodiments of gas metering valves according to the invention, also in a schematic representation, with a needle-shaped closing element,
- Figure 5 shows a further embodiment of a gas metering valve according to the invention in longitudinal section
- Figure 6 shows a further embodiment of a gas metering valve according to the invention.
- FIG. 7 shows a variant of the valve shown in FIG. 6 with an outwardly opening valve needle.
- FIG. 1 a first embodiment of a gas metering valve according to the invention is shown in longitudinal section.
- the gas metering valve has a housing 1 in which a gas space 2 is formed.
- the gas chamber 2 has an inlet opening 5 and an outlet opening 6, the gas to be metered entering the gas metering valve via the inlet opening 5 and into a combustion chamber of an internal combustion engine via the outlet opening 6.
- the outlet opening 6 is formed at the end of a nozzle shaft 7 which directs the gas flow so that the gas reaches the desired spatial area of the combustion chamber.
- a valve element 8 is arranged to be longitudinally movable, which has a valve sealing surface 10 on its end face facing the inlet opening 5, which is formed on a sealing element 9 which is part of the valve element 8.
- valve element 8 acts with a valve seat 11 for closing HC of the inlet opening 5 together, the valve seat 11 being formed in this exemplary embodiment in a connection 4 which is part of the housing 1 and has a longitudinal bore which forms the inlet opening 5.
- an elastic seal 12 is arranged on the valve sealing surface 10 of the valve element 8, as FIG. 2 shows in an enlarged illustration of the section of FIG. 1 labeled II.
- the elastic seal 12 for example an elastomer, covers the valve sealing surface 10 and interacts with a bite edge 13 which is formed on the valve seat 11 and surrounds the inlet opening 5.
- the bite edge 13 increases the surface pressure between the valve seat 11 and the elastic seal 12, so that a gas-tight seal is achieved, even in the case of metering highly volatile gases, such as hydrogen, for example.
- annular ridge 14 is also formed on the outer edge of the sealing element 9, the annular ridge 14 surrounding the bite edge and the height of which is such that when the valve element 8 closes in the direction of the valve seat 11, the elastic seal 12 first attaches the bite edge 13 touches down and only then with the further closing movement also the ring ridge 14 on the valve seat 11.
- the height of the ring ridge 14 is greater than the height of the bite edge 13, so that the elastic device 12 is pressed against the bite edge 12 and thus effectively seals, but not excessively mechanical stress.
- valve element 8 In order to move the valve element 8 in the gas metering valve, there is an electrical actuator in the form of an electromagnet 16 which surrounds the housing 1 at the level of the valve element 8 and which is fixed by a clamping nut 3.
- the valve element 8 acts as a plunger of the electromagnet 16, so that when the electromagnet 16 is energized, the valve element 8 is pulled away from the valve seat 11 until the valve element 8 comes to rest against a stroke stop 20 in the gas chamber 2.
- the movement of the valve element 8 takes place against the force of a return spring 17, which biases the valve element 8 against the valve seat 11 and which also ensures that the valve element 8 moves back into its closed position when the electromagnet 16 is switched off and closes the inlet opening 5.
- a shut-off valve 25 is arranged between the valve element 8 and the outlet opening 6. In this exemplary embodiment, it allows a gas flow from finally in the flow direction 15 from the inlet direction 5 to the outlet opening 6, but blocks a gas flow in the opposite direction.
- the shut-off valve 25 comprises a closing element 26, here in the form of a flat disk.
- the closing element 26 is pressed by a closing spring 29 against a sealing surface 23 which is formed on a shoulder 22 arranged in the gas space 2.
- the shut-off valve 25 therefore only opens when the gas pressure between the closing element 26 and the valve element 8 is greater than the gas pressure on the opposite side of the closing element 26 and can thereby overcome the force of the closing spring 29. Since the closing element 26 is disk-shaped, it has a circumferential edge, so that the closing element controls a relatively large flow cross-section even with a small stroke and the gas can flow to the outlet opening 6 without significant throttling.
- the electromagnet 16 is energized and the valve element 8 is pulled away from the valve seat 11 by the action of the magnetic field generated in this way until it rests against the stroke 20.
- the gas then flows through the inlet opening 5 and the transverse and longitudinal bores 18, 19 of the valve element 8 to the shut-off valve 25.
- the increasing pressure on the side of the closing element 26 facing the valve element 8 pushes it open against the force of the closing spring 29 and releases it A flow cross-section between the sealing surface 23 and the closing element is free, through which gas passes into the nozzle shaft 7 and finally to the outlet opening 6.
- the energization of the electromagnet 16 is interrupted so that the valve element 8 closes the inlet opening 5 again. Since gas no longer flows to the shut-off valve 25, this also closes by the closing spring 29.
- the gas metering valve is particularly suitable for injecting gas into a combustion chamber of an internal combustion engine, since it provides a reliable seal of the gas with a long service life at the same time.
- the shut-off valve 25 also prevents the flame front from spreading in the combustion chamber into the gas chamber 2, since the shut-off valve 25 closes immediately after the gas injection has ended, which is additionally supported by the increasing pressure in the combustion chamber. Excessive heating of the valve seat 11 is thus reliably prevented.
- FIG. 3 a further embodiment of the gas metering valve according to the invention is shown in longitudinal section, this representation being made only schematically.
- the most important structural difference to the exemplary embodiment in FIG. 1 is a pressure pin 30 which is arranged on the valve element 8.
- the pressure pin 30 comes to rest on the closing element 26 and moves it against the force of the closing spring 29 into its open position. Since the shut-off valve 25 thus opens practically at the same time as the valve element 8, there is no delay due to the pressure build-up upstream of the shut-off valve 25, which is otherwise necessary, so that there is a shorter response time, i.e. a shorter delay between the energization of the electromagnet 16 and the start of the Gas injection.
- the closing process of this gas metering valve takes place analogously to the exemplary embodiment in FIG. 1.
- FIG. 4a shows a further exemplary embodiment of the gas metering valve according to the invention, the representation corresponding to that of FIG.
- the valve element 8 and the valve sealing surface 10 is only made in a simplified manner and instead of the transverse and longitudinal bores 18, 19, two longitudinal bores 19 are formed here, which is functionally identical, however.
- the shut-off valve 25 here has a closing element in the form of a valve needle 26 '.
- the valve needle 26 ' is guided in the nozzle shaft 7 with a first guide section 32 and a second guide section 33, with bevels, not shown here, being formed on both guide sections 32, 33, which allow a throttle-free gas flow past the guide sections 32, 33.
- valve needle 26 ′ At its end facing the outlet opening 6, the valve needle 26 ′ has a valve seat 35 with which the valve needle 26 ′ cooperates with a conical sealing surface 23 ′ at the end of the nozzle shaft 7.
- the valve needle 26 ' is thereby closed by a spring 29 pressed against the sealing surface 23 'and opens - just like the closing element in the embodiment of Figure 1 - by a corresponding pressure in the gas chamber 2.
- the seal against the combustion chamber is therefore directly at the end of the gas metering valve, so that the flame front of the combustion chamber can only reach the outermost end of the housing 2.
- FIG. 4b A modification of this exemplary embodiment is shown in FIG. 4b.
- the return spring 17 of the valve element 8 is not supported here on a shoulder of the housing 2, but on the closing element or the valve needle 23 '. Since no support surface has to be provided for the return spring 17, there is greater structural freedom in the design of the housing 2.
- FIG. 4c shows a further exemplary embodiment according to the invention.
- a pressure pin 30 is formed on the valve element 8, which comes into contact with the valve needle 26 'during the opening movement of the valve element 8 and moves it against the bias of the closing spring 29. Functionally, this results in the same interaction between valve element 8 and valve needle 26 'as in the previous exemplary embodiment in FIG. 3.
- FIG. 5 a further embodiment of the gas metering valve according to the invention is shown.
- the elastic sealing element 12 is implemented here by a sealing ring on the valve seat 11, on which the valve element 8 rests in its closed position with the valve sealing surface 10.
- two or more inwardly extending inclined bores 19 ′ are formed and the return spring 17 is received in a cylindrical recess in the valve element 8.
- the closing element 26 of the shut-off valve 25 is guided in a guide bore 38 in the housing 1, the gas being guided through inclined bores 27 in the closing element 26.
- the sealing surface 23 is formed on a circumferential ring ridge in the gas space 2, with which the closing element 26 interacts.
- FIG. 6 shows a further embodiment of a gas metering valve according to the invention.
- the valve element 8 is constructed similarly to the embodiment shown in FIG. the Return spring 17 is now arranged between the coupler sleeve 40 and the housing 1 under pressure bias and presses the coupler sleeve 40 against the valve element 8 and this in the direction of the valve seat 11.
- the coupler sleeve 40 forms inside a channel 43 through which the gas from the valve seat 11 with geöff netem valve element 8 flows through the inclined bores 19 'and a central recess 39 and is further gelei tet through this channel to the outlet opening 6.
- a damping space 42 is formed, which is bounded inwardly by the coupler sleeve 40 be.
- the damping chamber 42 is connected to the gas chamber 2 via a first annular gap 44 between the valve element 8 and the housing 1 and a second annular gap between the coupler sleeve 40 and the housing, with both annular gaps 44, 45 being dimensioned such that a gas flow from the or can only take place in a throttled manner in the damping chamber 42.
- the damping chamber 42 serves to dampen the valve element movement by displacing the gas out of the damping chamber 42 during the opening movement of the valve element 8 away from the valve seat 11 and pushing it out through the annular gaps 44, 45.
- annular gaps 44, 45 can also be modified, for example by means of longitudinal grooves in the valve element 8 or on the outside of the coupler sleeve 40, in order to specifically influence the flow resistance through the annular gaps 44, 45 and thus the damping effect on the valve element 8 through the damping space 42.
- FIG. 7 shows a further implementation of the gas metering valve shown in FIG.
- the end face of the coupler sleeve 40 facing away from the valve element 8 rests on the needle-shaped closing element 26 ', so that the movement of the valve element 8 in the opening direction pushes the coupler sleeve 42 in the direction of the outlet opening 6, which in turn opens the valve needle 26'.
- the gas flow from the channel 43 to the outlet opening 6 is ensured by a plurality of openings 48 in the coupler sleeve 42.
- valve needle 26 ' is also here biased by a closing spring 29 ge conditions the conical valve seat 35, the closing spring 29 between tween a spring plate 31 connected to the valve needle 26' and a set in the housing 1 is arranged under pressure bias.
- grindings are also formed that ensure a throttle-free gas flow to the outlet opening 6.
- gas metering valve is particularly suitable for metered delivery of gas into a combustion chamber, it can also be used for other purposes, for example for metered delivery of gas into the intake tract of an internal combustion engine or for other technical applications.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
- Measuring Volume Flow (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020201168 | 2020-01-31 | ||
DE102020201973.8A DE102020201973A1 (de) | 2020-01-31 | 2020-02-18 | Gasdosierventil für Brennkraftmaschinen |
PCT/EP2021/051857 WO2021151941A1 (de) | 2020-01-31 | 2021-01-27 | Gasdosierventil für brennkraftmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4097346A1 true EP4097346A1 (de) | 2022-12-07 |
Family
ID=76853428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21703170.7A Pending EP4097346A1 (de) | 2020-01-31 | 2021-01-27 | Gasdosierventil für brennkraftmaschinen |
Country Status (7)
Country | Link |
---|---|
US (1) | US11873784B2 (de) |
EP (1) | EP4097346A1 (de) |
JP (1) | JP7476322B2 (de) |
KR (1) | KR20220141819A (de) |
CN (1) | CN115053062A (de) |
DE (1) | DE102020201973A1 (de) |
WO (1) | WO2021151941A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020215169A1 (de) | 2020-12-02 | 2022-06-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil für gasförmigen Brennstoff |
DE102021200180A1 (de) | 2021-01-11 | 2022-07-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil zur dosierten Abgabe von gasförmigem Kraftstoff |
DE102021203091A1 (de) | 2021-03-29 | 2022-09-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil |
DE102021203092A1 (de) | 2021-03-29 | 2022-09-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil |
DE102021204437A1 (de) | 2021-05-03 | 2022-11-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil |
CN113202659B (zh) * | 2021-05-08 | 2022-03-18 | 河南航天液压气动技术有限公司 | 一种用于小流量微型电磁阀的衔铁组件 |
DE102021207886A1 (de) | 2021-07-22 | 2023-01-26 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasdosierventil |
DE102021212279A1 (de) | 2021-10-29 | 2023-05-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben eines Dosierventils für ein Fluid |
DE102021128957A1 (de) * | 2021-11-08 | 2023-05-11 | Liebherr-Components Deggendorf Gmbh | Injektor zum Einblasen von Gas |
DE102021133210A1 (de) * | 2021-12-15 | 2023-06-15 | Liebherr-Components Deggendorf Gmbh | Injektor zum Einspritzen von Kraftstoff |
DE102021214780A1 (de) * | 2021-12-21 | 2023-06-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | Kraftstoffinjektor für gasförmige Brennstoffe |
DE102022200564A1 (de) * | 2022-01-19 | 2023-07-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit unterdruckgesteuertem zweitem Dichtsitz |
DE102022213511A1 (de) | 2022-12-13 | 2024-06-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit verbesserter Nadelführung |
DE102022213515A1 (de) | 2022-12-13 | 2024-06-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Ventil zum Zumessen eines Fluids, insbesondere Gasinjektor |
DE102022213516A1 (de) | 2022-12-13 | 2024-06-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit verbesserter Nadelführung |
DE102022213512A1 (de) | 2022-12-13 | 2024-06-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit verbesserter Dichtsitzauslegung |
DE102022213514A1 (de) | 2022-12-13 | 2024-06-13 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit verbesserter Nadelführung |
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JP4470137B2 (ja) | 2001-02-01 | 2010-06-02 | 株式会社ニッキ | 燃料噴射弁 |
US20060186230A1 (en) | 2005-02-22 | 2006-08-24 | Adams Joseph S | Gaseous Fuel Injector for Linear Motor |
JP2007205216A (ja) * | 2006-02-01 | 2007-08-16 | Nikki Co Ltd | 気体燃料用インジェクタにおけるインジェクタ弁 |
DE102009012688B3 (de) * | 2009-03-11 | 2010-07-22 | Continental Automotive Gmbh | Ventil zum Einblasen von Gas |
JP2012112289A (ja) | 2010-11-24 | 2012-06-14 | Toyota Industries Corp | 副室式ガスエンジン |
JP5482836B2 (ja) * | 2011-09-20 | 2014-05-07 | 株式会社デンソー | 燃料噴射弁及び燃料噴射弁の製造方法 |
DE102013202610A1 (de) * | 2013-02-19 | 2014-08-21 | Robert Bosch Gmbh | Ventil mit verbessertem Dichtelement und verbessertem Ventilsitzträger |
DE102013202631A1 (de) * | 2013-02-19 | 2014-08-21 | Robert Bosch Gmbh | Ventil mit einstellbarem Dichtelement |
DE102013202599A1 (de) * | 2013-02-19 | 2014-08-21 | Robert Bosch Gmbh | Dichtelement eines Ventils und Gasventil |
DE102013205624B4 (de) | 2013-03-28 | 2015-07-09 | Continental Automotive Gmbh | Ventil zum Einblasen von gasförmigen Kraftstoffen für eine Brennstoffmaschine |
DE102014212562A1 (de) * | 2013-10-30 | 2015-04-30 | Robert Bosch Gmbh | Injektor, insbesondere Einblasinjektor zur Direkteinblasung |
DE102013222030A1 (de) | 2013-10-30 | 2015-04-30 | Robert Bosch Gmbh | Injektor, insbesondere Einblasinjektor für gasförmigen Kraftstoff+ |
DE102014200756A1 (de) | 2014-01-17 | 2015-07-23 | Robert Bosch Gmbh | Gasinjektor zum Direkteinblasen von gasförmigem Kraftstoff in einen Brennraum |
DE102014224340A1 (de) * | 2014-11-28 | 2016-06-02 | Robert Bosch Gmbh | Gasinjektor mit Elastomerdichtelement |
DE102014224341A1 (de) * | 2014-11-28 | 2016-06-02 | Robert Bosch Gmbh | Gasinjektor mit Elastomerdichtung |
DE102016215027A1 (de) | 2016-08-11 | 2018-02-15 | Robert Bosch Gmbh | Brennstoffzellenvorrichtung |
DE102017218267B4 (de) * | 2017-10-12 | 2019-05-02 | Continental Automotive Gmbh | Fluidventil und Verfahren zur Steuerung der Zufuhr von Fluid |
DE102018206334A1 (de) * | 2018-04-25 | 2019-10-31 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für kryogene Kraftstoffe |
JP6753432B2 (ja) | 2018-05-08 | 2020-09-09 | 株式会社デンソー | 燃料噴射装置 |
JP2022024202A (ja) * | 2018-11-22 | 2022-02-09 | 日立Astemo株式会社 | 燃料噴射装置 |
-
2020
- 2020-02-18 DE DE102020201973.8A patent/DE102020201973A1/de active Pending
-
2021
- 2021-01-27 CN CN202180011883.4A patent/CN115053062A/zh active Pending
- 2021-01-27 US US17/794,372 patent/US11873784B2/en active Active
- 2021-01-27 EP EP21703170.7A patent/EP4097346A1/de active Pending
- 2021-01-27 JP JP2022546528A patent/JP7476322B2/ja active Active
- 2021-01-27 WO PCT/EP2021/051857 patent/WO2021151941A1/de unknown
- 2021-01-27 KR KR1020227029256A patent/KR20220141819A/ko active Search and Examination
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US20230053845A1 (en) | 2023-02-23 |
US11873784B2 (en) | 2024-01-16 |
WO2021151941A1 (de) | 2021-08-05 |
JP2023513065A (ja) | 2023-03-30 |
CN115053062A (zh) | 2022-09-13 |
JP7476322B2 (ja) | 2024-04-30 |
DE102020201973A1 (de) | 2021-08-05 |
KR20220141819A (ko) | 2022-10-20 |
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