EP4285015A1 - Injektor zum einblasen von gas - Google Patents
Injektor zum einblasen von gasInfo
- Publication number
- EP4285015A1 EP4285015A1 EP22713526.6A EP22713526A EP4285015A1 EP 4285015 A1 EP4285015 A1 EP 4285015A1 EP 22713526 A EP22713526 A EP 22713526A EP 4285015 A1 EP4285015 A1 EP 4285015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- hollow needle
- needle
- valve
- hydrogen
- 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
- 238000002347 injection Methods 0.000 claims abstract description 70
- 239000007924 injection Substances 0.000 claims abstract description 70
- 239000001257 hydrogen Substances 0.000 claims abstract description 47
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 42
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims description 31
- 238000007664 blowing Methods 0.000 claims description 13
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004071 soot Substances 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
- F02M21/0248—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
- F02M21/0263—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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
-
- 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
- F02M21/0275—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
- F02M21/0296—Manufacturing or assembly; Materials, e.g. coatings
-
- 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 present invention relates to an injector for injecting a gas such as hydrogen, preferably for direct injection of hydrogen.
- the object of the present invention to provide an injector for blowing gas such as hydrogen, which is simple in structure and fail-safe.
- the injector according to the invention should also be able to inject a gas, for example hydrogen, directly into a combustion chamber that interacts with the injector. It's similar to Fuel injectors for diesel and petrol require gas to be blown into a combustion chamber at a specific rate and in a specific concentration.
- the device according to claim 1 represents an injector which is suitable for blowing gas into a combustion chamber and has a very simple structure combined with a very low susceptibility to errors.
- the injector for blowing in a gas such as hydrogen preferably for blowing in hydrogen directly, comprises an injector housing for accommodating injector components, a valve needle which is arranged in the injector housing so that it can move along its longitudinal axis and is designed to have an injection opening for gas to optionally flow through to close or release, and a valve, preferably a solenoid valve, which is designed to convert the valve needle into a closing or releasing state by moving it along its longitudinal axis.
- the injector is characterized in that the valve needle is a hollow needle which is designed to direct a gas flowing through the injection opening through the interior of the hollow needle.
- the provision of the hollow needle and the passage of the gas to be dispensed through it enables a particularly simple construction of an injector for blowing in gas.
- Complicated line ducts for supplying a combustion gas to the at least one injection opening are omitted, but the sealing of the at least one injection opening is still carried out by lifting or lowering the valve needle, which is designed as a hollow needle.
- a further advantage of using a hollow needle is that the supply line for the gas can run in a straight line from a connection side of the injector to the hollow needle, so that virtually no turbulence or similar negative effects can occur there.
- a hollow needle which at the same time serves to close the at least one injection opening in a lowered state and to release this at least one injection opening in a lifted state offset in the direction of its longitudinal axis, represents an essential feature for simplifying the structural design of the injector according to the invention .
- the gas can be hydrogen
- the injector is also designed to guide all of the gas flowing through the injection opening through the inside of the hollow needle. According to this modification, it is therefore not intended that there are other ducts for supplying hydrogen, so that all of the hydrogen leaving the injector must be passed through the hollow interior of the hollow needle.
- the person skilled in the art is aware that there are of course always unavoidable leaks that occur in sealing areas and through which an unavoidable minimum of the medium to be sealed diffuses.
- the hollow needle starting from its hollow interior, has at least one flow channel running laterally outwards, preferably such that when the injector is open, the end of the hollow needle facing the injection opening is on the inside and outside of Gas can flow around. Accordingly, there can be two or more outlet openings for a gas introduced into the hollow needle.
- the hollow needle In addition to the original exit of the hollow needle, there can therefore be at least one further exit that runs laterally to the longitudinal axis of the hollow needle.
- the hollow needle essentially has the structure of a cylinder jacket surface, the at least one flow channel running laterally outward penetrates this cylinder jacket surface and creates a further outlet for a fluid introduced into the hollow needle.
- the at least one laterally outwardly extending flow channel is preferably located in the longitudinal half, or in the Longitudinal third, the hollow needle facing the at least one injection opening.
- the additional flow channel can run perpendicularly or at an angle to the longitudinal direction of the hollow needle.
- the hollow needle has a flange-like projection at its end facing the injection opening, which serves to seal the at least one injection opening located in a valve plate.
- This flange-like projection at one end of the hollow needle can be referred to as a plate and simplifies the desired sealing of the at least one injection opening.
- the at least one injection opening is a fluid passage through a valve plate, which ensures that a fluid flow from the one side of the valve plate that faces the hollow needle to the other side facing away from the hollow needle is only possible through the at least one injection opening.
- sealing elements are provided between the end face of the hollow needle facing the valve plate and the corresponding side of the valve plate, which enclose the at least one injection opening on the side of the valve plate facing the hollow needle. This improves the sealing effect when the end face of the hollow needle touches down, since the sealing elements made of rubber or the like are compressed by the force exerted by the hollow needle and thus ensure very good sealing of the at least one injection opening.
- valve plate can be rotationally or rotationally symmetrical to the longitudinal axis of the hollow needle.
- the valve preferably a solenoid valve, has an anchor element that can be moved to the longitudinal axis of the hollow needle and is firmly connected to the hollow needle, in particular by pressing, and/or is formed in one piece with it.
- the anchor element is the element which can be moved back and forth along the longitudinal axis of the hollow needle in the injector housing when the valve, preferably the solenoid valve, is actuated.
- the valve is a solenoid valve
- magnetic forces act on the armature element such that when the solenoid valve is actuated, the armature element is moved away from the valve plate along the longitudinal direction of the hollow needle in order to open the at least one injection opening.
- these two components of the injector are firmly connected to one another and/or are formed in one piece.
- the hollow needle is screwed, glued and/or pressed to the anchor element.
- the anchor element has a corresponding recess which is used to insert the end of the hollow needle remote from the valve plate and in which the hollow needle is pressed, glued or screwed to the anchor element.
- the pressing can take place in at least two different ways.
- the anchor encloses the needle whereas in a second case the needle encloses the anchor.
- the armature to be pressed against the needle during the pressing, so that the armature and needle touch one another. Compression to the stop may be provided for any of the different types of compression discussed above.
- the anchor element has a through-opening for passing gas through from a connection side of the injector to the inside of the hollow needle, with a cavity of the hollow needle and the through-opening of the anchor element preferably being aligned coaxially with one another and/or aligned with one another.
- the passage opening of the anchor element can therefore represent a continuation of the inner cavity of the hollow needle, preferably in the transition region of the inner cavity of the hollow needle to the
- the anchor element can therefore have a through-opening running parallel to the longitudinal center axis of the hollow needle in order to allow a gas to be emitted by the injector through the latter
- the anchor element and the hollow needle consist of different materials, preferably wherein the anchor element is a magnetizable body that is moved when actuating a solenoid valve in the longitudinal direction of the hollow needle and through the Connection to the hollow needle lifts it from the injection port or settles on it.
- the advantage of an embodiment in which the anchor element and the hollow needle consist of different materials is that the two components connected to one another can be optimized with regard to different functions. It is of overriding importance for the anchor element to perform the lifting and lowering movement to be carried out in the longitudinal direction of the injector, which is transmitted to the hollow needle due to the connection to the latter. If, for example, a solenoid valve is used, it is essential that the anchor element is a magnetizable body that can be moved by the action of magnetic field lines.
- the hollow needle does not have to be magnetizable itself due to its connection to the anchor element, but can also be a non-magnetizable body that is optimized with regard to other requirements (e.g.
- the injector is also provided with an elastic element, preferably a spring element, which is designed to urge the anchor element in a direction away from a connection side in order to push the hollow needle connected to the anchor element into Bias direction injection opening, preferably the elastic element is a spiral spring whose spring force acts parallel to the longitudinal direction of the hollow needle.
- the anchor element and the hollow needle fixed to it are prestressed against the valve plate with the injection openings provided therein.
- the at least one injection opening is closed by the hollow needle, which is prestressed against the valve plate, so that, under a certain pressure, gas introduced into the injectors on a connection side cannot leave the injector.
- the at least one injection opening is only uncovered when the valve is actuated and the anchor element, together with the hollow needle, thereby executes a movement away from the valve plate. This movement must overcome the force acting on the anchor element by the elastic element, which means that when the valve is deactivated, the elastic element automatically causes the hollow needle to be lowered onto the valve plate and the at least one injection opening to be closed as a result.
- the elastic spring element is a spiral spring which is supported on the injector housing or on a component rigidly connected thereto (for example an armature counterpart).
- the elastic spring element acts on that side of the anchor element which is opposite to the hollow needle.
- a central axis or an axis of rotation or symmetry of the armature element can also run through the interior defined by the winding of the spiral spring.
- the spiral spring is arranged in a channel carrying the gas, so that the spring can come into direct contact with the gas.
- a needle guide is provided, which is arranged in the injector housing, surrounds the circumference of the hollow needle on its outside and is designed to allow only one movement, preferably a sliding movement, of the hollow needle parallel to its longitudinal direction allow.
- a needle guide which accommodates the hollow needle on an outer wall such that it can only move back and forth in the longitudinal direction of the injector.
- the hollow needle can be slidably received in the needle guide in order to suppress lateral play as much as possible.
- the hollow needle has/have a coating on its outside and/or the needle guide on its inside for low-wear sliding, in particular has/have a carbon-containing coating. Such a coating is particularly advantageous when blowing in gas or hydrogen through the injector, since gases in general and hydrogen in particular have no lubricating properties.
- the needle guide is preferably a component separate from the injector housing, which is inserted into the interior of the housing and can have a certain amount of play in the longitudinal direction of the injector housing, i.e. it can move to a small extent in the longitudinal direction without giving up the basic function of a needle guide .
- This play is particularly advantageous because when installing the injector in a corresponding engine, high axial forces act in the longitudinal direction of the injector housing (usually by screwing in the injector housing or putting on and tightening a union nut) and a resulting change in length of the injector housing is compensated by the play can be.
- At least two guide bands are used, which are preferably attached to the needle and/or the needle guide. It is also possible that a first guide band is arranged on the needle and a second guide band on the needle guide.
- an interference fit between the anchor and the needle for example, a compression, seen in the axial direction, is arranged between two axially spaced-apart guide bands.
- Corresponding grooves running around the outside of the flea needle or running around the inside of the needle guide can be provided for the provision of the guide band, into which a guide band is inserted so that only part of its thickness protrudes from the groove.
- the valve is a solenoid valve and has an annular magnetic coil, which surrounds the armature element on the circumference and is able to generate a magnetic force in order to move the armature element towards the connection side of the injector move.
- a coil is provided for providing a magnetic force, which causes a movement of the armature element, for example away from the valve plate.
- the coil typically passes around the outside of the armature element, so that the armature element is partially or completely located in the inner region of the coil winding.
- the hollow needle and the anchor element are formed rotationally symmetrically or rotationally symmetrically to a common axis of rotation, the common axis of rotation being parallel or identical to the longitudinal axis of the hollow needle.
- the injector housing and/or the needle guide can also be rotationally symmetrical to this common axis of rotation of the hollow needle and the anchor element be rotationally symmetrical, which entails a simple structure of the individual components of the injector.
- the injector is designed to inject gas via the at least one injection opening into a combustion chamber without the admixture of air.
- the injector is designed to inject gas via the at least one injection opening into a combustion chamber without the admixture of air.
- the invention also relates to an internal combustion engine with gas direct injection, in particular hydrogen direct injection, which includes an injector according to one of the above variants. Further features, details and advantages of the invention can be seen from the following description of the figures. It shows:
- Fig. 1 a sectional view through an injector according to the invention
- Fig. 2 a detailed sectional view of a further possibility for pressing
- FIG. 1 shows a longitudinal section of the injector 1 according to the invention for blowing hydrogen into a combustion chamber 16.
- the injector 1 has an injector housing 2 in which different components of the injector 1 are located.
- a gas connection 11 for introducing hydrogen into the injector 1 is provided on the connection side.
- the hydrogen or another combustible fluid is fed through a hole in a cover 29 running approximately centrally in the injector housing 2 and then through a fluid channel in an armature counterpart 27, a through-opening 10 in the armature 5 and the hollow interior 12 of a hollow needle 3 to the the end of the hollow needle 3 remote from the connection side 11 .
- the injection openings 4 penetrating the valve plate 9 are closed or opened.
- the injection openings 4 are closed by the hollow needle 3 being pressed against the valve plate 9 , since the end face of the hollow needle 3 covers the opening contours of the injection openings 4 .
- sealing elements 30 can be provided, which run around the opening contours of the injection openings 4 and contact the end face of the hollow needle 3 when the hollow needle 3 is in a sealed state. If the injection openings 4 are closed by the end face of the hollow needle 3, the fluid flow of the hydrogen is stopped at this point of the injector 1 and there is no downstream flow of hydrogen beyond the valve plate 9.
- the hydrogen introduced into the injector 1 at a certain pressure flows out of the interior 12 of the hollow needle 3 and exits through the plurality of injection openings 4 on the side of the valve plate 9 that is spaced apart from the hollow needle 3.
- the pressurized hydrogen flows through the injection cap 18, which can also be optionally provided and which has at least one through-opening 17 has.
- the hydrogen emitted by the injector 1 is typically outside the injector 1 in a combustion chamber 16 ignited or ignited.
- the hydrogen required for combustion would then no longer be introduced into the combustion chamber 16, but an already at least partially combusted mixture, which can lead to an interruption of the combustion process or, at best, to a lower performance of the combustion process.
- the check valve 20, 21, 23 has a valve tappet 20, a valve guide 21 and a valve spring 23, which urges the valve tappet in a closing direction, so that an outflow of hydrogen via the opening contour 19 of the check valve 20, 21, 23 only occurs when when the pressure on the side of the check valve 20, 21, 23 facing the valve plate 9 is greater than that on the side of the check valve 20, 21, 23 facing away from the valve plate 9 by at least the restoring force of the valve tappet 20 exerted by the valve spring 23 side prevailing pressure. This prevents a fluid from flowing in from the side of the check valve 20, 21, 23 arranged in the injection pipe 22 that faces the combustion chamber.
- the valve needle 3 designed as a hollow needle 3 can be moved back and forth in the longitudinal direction of the injector 1 .
- the movement of the valve needle 3 is about a valve 5, 6 is controlled, which is a solenoid valve in the present representation of FIG.
- the hollow needle 3 is firmly connected to an anchor element 5 which in turn reacts to the magnetic force generated by a coil 6 .
- Current can optionally flow through the coil 6 in such a way that the resulting magnetic force moves the armature element 5 in the direction of the gas connection 11 .
- This movement also moves the hollow needle 3 , which is firmly connected to the anchor element 5 , so that the hollow needle 3 is lifted relative to the valve plate 9 . This opens up the injection openings 4 in the valve plate 9 so that hydrogen can flow through the valve plate 9 .
- a needle guide 14 is provided which encloses an outer side of the hollow needle 3 on the peripheral side. Sliding friction occurs in the contact area between the needle guide 14 and the outside of the hollow needle 3, so that it can be advantageous if one of the two contact surfaces or both contact surfaces has a special coating, in particular a coating with carbon. It has been shown that such a carbon-containing coating is advantageous with regard to the tribological requirements of the two sliding components.
- the needle guide 14 can be designed such that it extends from the valve plate 9 and protrudes inwards at a certain distance from it so that it only comes into contact with the outside of the hollow needle 3 at a certain distance from the valve plate 9 . Irrespective of the specific configuration of the needle guide 14, the hollow needle 3 pierces the needle guide 14 in such a way that the end of the valve needle 3 facing the valve plate 9 is still guided completely through the needle guide 14 even when it is lifted from the valve plate 9.
- the needle guide can in this case, just like the anchor element 5 and the hollow needle 3, it can be designed to be rotationally symmetrical or rotationally symmetrical to the axis of rotation X of the injector 1.
- a flange-like projection is provided on the end of the hollow needle 3 facing the valve plate 9 , which makes it easier to cover the at least one injection opening 4 in the valve plate 9 .
- the hollow needle 3 can also have further flow channels 7 running obliquely or perpendicularly to its longitudinal direction, through which a hydrogen introduced into the hollow needle 3 can flow out.
- the advantage of this is that the hydrogen introduced into the injector 1 flows around the side of the hollow needle 3 facing the injection openings 4 on both sides, ie from the inside and from the outside.
- the stroke of the valve needle 3 or of the armature element 5 can thus be minimized and the required flow of hydrogen can nevertheless be realized. This is because the flow can be divided into an external flow (via flow channel 7 ) and an internal flow through the exit hole of the hollow needle 3 facing the valve plate 9 .
- the flange-like projection 8, also called plate, is therefore flowed around on both sides.
- An air gap 24 is provided between the needle guide 14 and the anchor element 5 , which allows a certain movement of the needle guide in the longitudinal direction of the injector 1 .
- the needle guide 14 fulfills its primary task independently of its exact arrangement position, so that even the slight play in the longitudinal direction of the injector 1 does not change anything here. In particular, however, when injector housing 2 is compressed, for example caused by attachment of injector 1 to an engine or thermal expansion or contraction, this air gap 24 serves as a reserve, so that a change in length of injector housing 2 in the longitudinal direction can be compensated for without a force to initiate the needle guide 14.
- An armature counterpart 27 is provided on the side of the armature element 5 facing away from the hollow needle 3 , in which an elastic spring element 13 in the form of a spiral spring is arranged, which urges the armature element 5 in the direction of the valve plate 9 . Without the valve 5, 6 being actuated, the hollow needle 3 is pushed in the direction of the valve plate 9 and closes the at least one injection opening 4. Similar to that In anchor element five, the anchor counterpart 27 also has a through-opening, the center of which can be arranged in the longitudinal center axis X of the injector 1 . A simple way of introducing the elastic spring element 13 into the armature counterpart 27 is to change the diameter of the passage opening of the armature counterpart 27.
- the resulting step is used as a stop surface for the elastic spring element 13, so that further structural changes are not necessary.
- the passage opening through the anchor counterpart 27 can be realized by two bores with different diameters, which have the same bore center axis. Furthermore, it can be provided that the center axis of the drilling is identical to the center axis of the anchor element 5 .
- the outside of the coil 6 can be surrounded by an iron yoke 25, in which the magnetic field can propagate particularly well.
- FIG. 15 A visualized representation of the magnetic field lines is illustrated by reference number 15 . These have a direction which is counter-clockwise when viewed in FIG. As a result, the armature element 5 is pulled towards the armature counterpart 27 and the hollow needle 3 is lifted off the valve plate 9 or from the injection openings 4 breaking through the valve plate 9, so that hydrogen can flow towards the check valve, from where hydrogen finally flows out via the Injection cap 18 is introduced into the combustion chamber 16 .
- FIG. 2 shows a detailed sectional view of a further possibility for pressing anchor 5 and needle 3. The upper half of the relevant area for the connection of anchor 5 and needle 3 is shown 31 are arranged, which are spaced apart from one another in the longitudinal direction of the injector 1.
- a uniform force acts on the two guide bands 31 when sliding between the needle 3 and the needle guide 14. It can also no longer happen that a single guide band 31 tends to cant due to the application of a force that is not evenly balanced due to the pressing and no longer slides cleanly along the needle guide 14.
- the embodiment of the press fit between the armature 5 and the needle 3 shown in FIG. 2 should not be understood as limiting, but that the invention also includes the provision of only one guide band 31 or more than two guide bands 31 with an identical arrangement of the armature 5 and needle 3 includes.
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- 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)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021103338.1A DE102021103338A1 (de) | 2021-02-12 | 2021-02-12 | Injektor zum Einblasen von Gas |
| PCT/EP2022/052888 WO2022171574A1 (de) | 2021-02-12 | 2022-02-07 | Injektor zum einblasen von gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4285015A1 true EP4285015A1 (de) | 2023-12-06 |
Family
ID=80979169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22713526.6A Pending EP4285015A1 (de) | 2021-02-12 | 2022-02-07 | Injektor zum einblasen von gas |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240077051A1 (de) |
| EP (1) | EP4285015A1 (de) |
| CN (1) | CN116940756A (de) |
| DE (1) | DE102021103338A1 (de) |
| WO (1) | WO2022171574A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022130562A1 (de) * | 2022-11-18 | 2024-05-23 | Liebherr-Components Deggendorf Gmbh | Injektor zum Einspritzen von Kraftstoff |
| DE102022131385A1 (de) * | 2022-11-28 | 2024-05-29 | Liebherr-Components Deggendorf Gmbh | Injektor zum Einspritzen von Kraftstoff |
| CN116378862B (zh) * | 2023-03-21 | 2024-05-03 | 一汽解放汽车有限公司 | 气体喷射装置 |
| EP4689377A1 (de) * | 2023-03-28 | 2026-02-11 | Liebherr-Components Deggendorf GmbH | Injektor zum einspritzen von kraftstoff |
| US12385452B2 (en) | 2023-04-17 | 2025-08-12 | Cummins Inc. | Fuel injector for gaseous fuel and valve assembly for the same |
| DE102023203649A1 (de) * | 2023-04-20 | 2024-10-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit Magnetaktor |
| DE102023110057B4 (de) * | 2023-04-20 | 2025-02-13 | Schaeffler Technologies AG & Co. KG | Strahlpumpe |
| DE102023112557A1 (de) * | 2023-05-12 | 2024-11-14 | Hyundai Motor Company | Wasserstoff-Direkteinspritzsystem und Verfahren zum Schmieren eines Kraftstoffeinspritzers eines Wasserstoff-Direkteinspritzsystems |
| WO2025193417A1 (en) * | 2024-03-11 | 2025-09-18 | Cummins Inc. | Fuel injector for gaseous fuel and modular valve assemblies for the same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994015092A1 (en) | 1992-12-21 | 1994-07-07 | Transcom Gas Technologies Pty. Ltd. | Fluid injector |
| US5328094A (en) * | 1993-02-11 | 1994-07-12 | General Motors Corporation | Fuel injector and check valve |
| JP2000087826A (ja) * | 1998-09-14 | 2000-03-28 | Toyota Motor Corp | 燃料噴射弁およびその製造方法 |
| US6755360B1 (en) * | 2001-03-01 | 2004-06-29 | Brunswick Corporation | Fuel injector with an improved poppet which is increasingly comformable to a valve seat in response to use |
| DE10319920A1 (de) * | 2002-10-26 | 2004-05-06 | Robert Bosch Gmbh | Ventil zum Steuern eines Fluids |
| DE10258859A1 (de) | 2002-12-17 | 2004-07-08 | Robert Bosch Gmbh | Fluidventil |
| DE10304143A1 (de) * | 2003-02-03 | 2004-08-05 | Robert Bosch Gmbh | Ventil zum Steuern eines Fluids |
| DE10353011A1 (de) | 2003-11-13 | 2005-06-16 | Robert Bosch Gmbh | Ventil zum Steuern eines Fluids |
| DE102004048602A1 (de) * | 2004-10-06 | 2006-04-13 | Robert Bosch Gmbh | Ventil zum Zuführen insbesondere gasförmiger Medien |
| JP2015105592A (ja) * | 2013-11-29 | 2015-06-08 | 愛三工業株式会社 | 燃料噴射弁 |
-
2021
- 2021-02-12 DE DE102021103338.1A patent/DE102021103338A1/de active Pending
-
2022
- 2022-02-07 EP EP22713526.6A patent/EP4285015A1/de active Pending
- 2022-02-07 CN CN202280014381.1A patent/CN116940756A/zh active Pending
- 2022-02-07 WO PCT/EP2022/052888 patent/WO2022171574A1/de not_active Ceased
- 2022-02-07 US US18/262,356 patent/US20240077051A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021103338A1 (de) | 2022-08-18 |
| US20240077051A1 (en) | 2024-03-07 |
| CN116940756A (zh) | 2023-10-24 |
| WO2022171574A1 (de) | 2022-08-18 |
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