EP3577335A1 - Anordnung - Google Patents
AnordnungInfo
- Publication number
- EP3577335A1 EP3577335A1 EP18703682.7A EP18703682A EP3577335A1 EP 3577335 A1 EP3577335 A1 EP 3577335A1 EP 18703682 A EP18703682 A EP 18703682A EP 3577335 A1 EP3577335 A1 EP 3577335A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- arrangement
- annular body
- fuel injector
- media
- 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.)
- Granted
Links
Classifications
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- 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
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/103—Lubrication of valve gear or auxiliaries of valve stem and guide
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
Definitions
- the present invention relates to an arrangement according to claim 1.
- rod-shaped elements e.g. Nozzle valve members or hold-down elements, sometimes with narrow gap guidance sections by different
- Housing elements are passed through, i. in particular to keep leaking amounts along the respective guide low.
- different media such as fuel gas and liquid fuel or control fluid to keep separated, such narrow gap dimensions are desirable.
- the problem arises that such rod-shaped members tend to jam even with slight misalignment of the leading housing elements.
- Fig. 1 shows an arrangement of a fuel injector of the prior art, which provides a multi-part design of a rod-shaped element in order to prevent such jamming.
- a design is disadvantageous to the extent that the number of parts is increased, thus increasing the production cost.
- jamming is not regularly reliably avoided, since the still narrow guide gaps - with this considerable length - tend to clogging (laking).
- the present invention has the object to provide an arrangement with which the disadvantages of the prior art can be overcome.
- an arrangement which can generally be used, for example, for a fuel injector, that is to say a fuel injection device or an internal combustion engine.
- a fuel injector having the arrangement may in particular be a dual-fuel fuel injector, eg for fuel gas (such as natural gas, special gas, landfill gas, hydrogen, etc.) and liquid fuel (eg diesel fuel, bio-oil or heavy oil).
- a fuel injector or a fuel injection device each with the arrangement can be provided in the context of the invention for a large engine, for example a motor vehicle such as a ship, a locomotive or a commercial or special vehicle, or for example for a stationary
- Means be provided, e.g. for a combined heat and power plant, an (emergency) generator, e.g. also for industrial applications.
- the proposed arrangement has a chamber or space defined between a first and a second (passage) receptacle for a rod-shaped element.
- the chamber may e.g. of cylindrical shape, alternatively e.g. also of dumbbell-like shape, here e.g. form two chamber parts communicating via the dumbbell web.
- the cross-section of the chamber is preferably circular, as well as that of the receptacles.
- the chamber and the receptacles which open at opposite end faces of the chamber to the chamber, in particular open into this, are preferably formed in a housing of the arrangement, which may be designed in particular in several parts.
- the chamber may be formed by means of two adjacent housing elements, e.g. Furthermore, by means of one or two blind holes, which are each worked in an interface of a housing element.
- a respective housing element for example, each form one of the images, along with the advantage of extremely simple production.
- Receivers for the rod-shaped element are preferably each a through-receiving, such as a bore (in a housing member), generally with a preferably circular cross-section, and further preferably in each longitudinal direction coaxially or concentrically aligned with the chamber.
- this further comprises a rod-shaped element, which is accommodated in the receptacles with (relatively wide) radial clearance via a respective section, insofar in particular with a recording radial clearance, and which
- the rod-shaped element in particular in its longitudinal direction, through the chamber passes (that is from end to end or from mouth to mouth).
- the rod-shaped element may be a round rod-shaped or partially round rod-shaped element, for example a stilt element (hold-down element), a piston element or a nozzle valve member such as a nozzle needle (in particular a fuel injector), eg also an anchor rod (eg a pilot valve of the fuel injector).
- the rod-shaped element in particular in the following sequence, both a nozzle valve member portion have, as well as a piston portion and a stilt portion.
- Stilt section forming the rod-shaped element passing through the chamber.
- the arrangement comprises an annular body, for example approximated or formed as the shape of an annular disc, which is arranged in the chamber and the rod-shaped element with (relatively less) radial clearance (with respect to the relatively wide radial play of the rod-shaped element in the receptacles or Preferably surrounds the recording radial clearance).
- the rod-shaped element passes through the ring body in particular, more particularly with the (relatively lower) radial clearance, i.e. insofar an annular body radial clearance, preferably also aligned coaxially with the annular body.
- the arrangement of the annular body in the chamber is also in particular independently of the rod-shaped element (longitudinal) displaceable.
- the ring-body radial clearance in the context of the proposed arrangement or in the context of the present invention, in particular, is less than the recording radial clearance (relatively wide radial clearance).
- this furthermore has a first and a second media side, which are connected to the chamber via the first or second receptacle, in particular communicate with the chamber via the first or second receptacle, that is to say the first media page, in particular Tethered via the first receptacle communicates preferably via the first receptacle with the chamber and the second media side, in particular connected via the second receptacle, preferably communicates via the second receptacle with the chamber (each across the radial gap around the rod-shaped element in the respective receptacle).
- the first media side is, for example, a fuel gas side
- the second media side for example, a control fluid side (in particular control oil side), preferably each of a fuel injector.
- a control fluid side in particular control oil side
- a predetermined media pressure difference between the media pages can be provided.
- the annular body is now provided or able to be urged against an end face of the chamber or to come into abutment with an end face of the chamber, in particular at the associated mouth (the Mouth of this end face) to seal against media entry into the chamber.
- the ring body can be displaced or becomes the ring body so far -ticianndruckbeetzmannt - displaced, in particular displaced in the longitudinal direction, or displaced along the rod-shaped element and urged into abutment on an end face.
- This position can then be reliably held, i. at least as long as the media pressure ratios are controlled accordingly or
- the arrangement according to the invention can thus be carried out in an advantageously simple manner a reliable seal at the mouth, in particular a self-seal, and thus also an intended media separation between the first and the second media side.
- the radial gaps around the rod-shaped element in the recordings can be wider than the narrow guide gaps in the prior art, since the preferably urged with Ruletikbeaufschlagung in abutment against an end face annular body such sufficient adhesion to the chamber wall can be taught that a Guide the rod-shaped element can be made advantageous by the ring body.
- lateral forces can also be introduced via the ring body on the end face into a housing element of the arrangement.
- a rod-shaped element in particular a nozzle valve member portion, a
- the annular body in particular formed with a single annular body, can be provided or able, in particular medialdruck- beank phenomenon to get on one or the other end face of the chamber in abutment (to be urged against this; and seal at the respective associated mouth against media entry into the chamber).
- the annular body may be, for example, an annular disk.
- the annular body can also be pressed against the one or the other end face (in particular, subjected to media pressure), as a result of which a guidance of the rod-shaped element at the one end or at the end side, in turn, also through the
- Ring body can be made.
- this has a further or second annular body, which is also arranged in the chamber and the rod-shaped element - analogous to the above-explained (first) ring body - with radial play or ring body radial play (relatively less radial clearance).
- the further annular body is opposite the (first) annular body in the direction of passage of the chamber or longitudinal extension direction, and in this embodiment also the further annular body, through which also the annular body rod-shaped element in particular passes (with annular body radial clearance), preferably in the chamber mediummediebabeaufschlagt and further preferably longitudinally displaceable independently of the rod-shaped element.
- the first annular body is in particular provided (preferably nienitentigbeetzt) to get into contact with an end face of the chamber (to be urged against the front side), in this case in particular seal at the associated mouth against media entry into the chamber, and the further or second ring body
- the media separation can be effected reliably here and a seal or self-seal can be achieved at both mouths here.
- a guide of the rod-shaped element can in this case be provided by two annular bodies, which are then able to initiate lateral forces in a housing element, in particular with media pressure or pressing on the opposite end sides of the chamber.
- the quality of the guide can be further increased due to two guided sections on the rod-shaped element.
- a conduction path is guided, via which the chamber is connected to a third media side of the arrangement, in particular with the third media side of the arrangement in communication can be brought.
- the conduction path is preferably guided radially to the chamber, e.g. produced in a simple manner as a groove in a housing element interface or as (radial) bore.
- Media side for example, a third pressurized medium, for example barrier fluid (when used with an injector), are led to the chamber, which assists in the media separation of the first and second media side.
- the medium of the third medium side e.g. have a higher pressure level than those of the first and second media side.
- a third media side is provided in particular to be able to press on the pressurized medium of the third media side both the first and the second ring body in abutment on an end face.
- a media intake of the third medium For this purpose, for example, it is possible to provide in the chamber (in a longitudinally central region) between the first and second annular bodies, but also at different positions therefrom.
- the arrangement may comprise a corresponding force-applying means or a force source, e.g. placed in or outside the chamber, e.g. a resilient element such as a compression spring or a tension spring or e.g.
- the force applying means or force source may e.g. to provide an assistant, e.g. in order to ensure or to effect the installation of the ring body (s) on an end wall / the end walls of the chamber only in the medium-pressure-free state.
- the annular body (s) is always, and in particular exclusively by the (pressure) force-exerting means or the force source, pressed against an end face of the chamber, regardless of the operating situation, in particular e.g. also permanently or permanently (especially medium pressure independent).
- this annular body in which at least one of the annular body in an intended direction of displacement niendbeetzt is urged against an end face of the chamber in investment, this annular body at one longitudinal end (front side) a contact surface and at an opposite longitudinal end (another end face) a contrast have surface enlarged pressure shoulder surface.
- the displacement behavior of the annular body can be influenced in a simple manner, that is to say by an area ratio-determined (contact surface / pressure shoulder surface) pressure difference characteristic which always favors a displacement as intended against the end wall of the chamber provided for this purpose.
- the annular body may have, for example, a chamfering or a deposition on the surface-enlarged pressure shoulder surface, while the contact surface is, for example, completely flat. If two annular bodies are to be able to be brought into abutment against opposing end faces, then both annular bodies can be designed in such a way, wherein the pressure shoulder surfaces preferably face each other.
- a resilient element may be arranged in the chamber, which against the ring body or the further ring body is urged.
- such a resilient element such as a (screw) compression spring urges the respective annular body against one of the orifices.
- a resilient element such as a (screw) compression spring
- urges the respective annular body against one of the orifices in the case of two annular bodies, for example, against the opposite mouths, wherein the resilient element, for example, supported against both ring body, for example, between these is arranged or caught.
- the chamber in the context of the present invention, provision can also be made for the chamber to form a passage opening for the rod-shaped element via a longitudinally central section, in particular with a radial clearance (relatively wide radial clearance, compared to the relatively smaller radial clearance or annular body radial clearance).
- the chamber has e.g. above-mentioned dumbbell-shaped figure.
- the sub-chambers communicating in this case communicate preferably via the passage opening (the (dumbbell) web) and can each accommodate one annular body.
- the chamber may e.g. be formed of more than two housing elements, in particular, e.g. three housing elements, wherein a lijnsedeems housing element advantageously just a bore for the formation of the
- Embodiments of the arrangement are also accompanied by the invention, in which a sealing element is arranged around the annular body between a circumferential wall of the chamber and at least one of the annular bodies, in particular a respective annular body, in particular an O-ring.
- the sealing element is preferably elastic and thus allows any required radial displacement of the annular body, wherein the sealing element can further advantageously provide a pre-positioning (centering) of the annular body in support against both the annular body and the peripheral wall of the chamber, thus also a centering in the frame can afford the leadership of the rod-shaped element on the ring body.
- a fuel injector is also proposed, in particular for operation with a first and a second medium, which may preferably be fuel gas and control fluid, eg control oil (besides, a fuel injector formed as a dual-fuel fuel injector may be used the present invention, for example, nor the W 201
- the proposed fuel injector has at least one arrangement as discussed above, wherein the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side of each arrangement, in particular pressurized (the first medium is provided on the first media side and the second medium is provided on the second media side
- Control oil pressure may be e.g. slightly above the fuel gas pressure (e.g., 350 bar)).
- the first medium may be present at the first receptacle in injector operation, for example, from a fuel gas nozzle space (first media side), the second medium e.g. by a Steuerfluid- control circuit (second media side) at the second recording pending, for example, by a hydraulic piston control arrangement of the fuel injector.
- the first medium may be present, for example, from a fuel gas storage of the fuel injector (first media side) at the first receptacle, the second medium at the second receptacle, for example, again by the control fluid control circuit of the fuel injector.
- the fuel injector is further configured to operate with a third medium provided on the third media side of the assembly.
- the third medium is for example a barrier fluid for sealing or media separation, further preferably pressurized via the conduction path to the chamber supplied.
- Barrier fluid pressure level is e.g. above that of the fuel gas site, e.g. 5 to 10 percent above the fuel gas pressure.
- the control fluid pressure may further be e.g. 500bar.
- a fuel injector arrangement can be formed with the fuel injector, which is set up in particular to provide the media at the first, second or also third media side with preset pressure levels.
- a fuel injector assembly is preferably a dual-fuel fuel injector assembly in which a barrier fluid supply is also provided to the fuel injector, i. to the chamber of the arrangement.
- a barrier fluid supply is also provided to the fuel injector, i. to the chamber of the arrangement.
- a respective ring body in the manner described above is urged towards an orifice at the chamber to the closure.
- such a Kraftstoffinjektoran be set up, before connecting the first and second media to the fuel injector or the chamber first, the medium of the third
- Kraftstoffinj ektoran be further configured to turn off the third medium after the first and second medium, that is, as the last.
- Fig. 1 by way of example and schematically a view of a fuel injector of the prior art.
- FIG. 2 shows by way of example and schematically a fuel injector with an arrangement according to a possible embodiment of the invention in a sectional view.
- Fig. 3 by way of example and schematically in a broken sectional view of a
- Fuel injector according to yet another embodiment of the invention.
- Fuel injector according to yet another possible embodiment of the invention.
- FIG. 6 shows an example and schematically in a sectional view of an arrangement of a
- FIG. 1 shows a view of a fuel injector of the prior art. In this case, this has a first 3 'and a second 5' housing element, which each have an axial bore for guiding a rod-shaped element 7 'such as a nozzle needle.
- a rod-shaped element 7 ' such as a nozzle needle.
- the rod-shaped element 7' is formed in two parts.
- such a design is expensive to manufacture and involves the risk that enforce over the considerable length narrow guide gaps.
- FIG. 2 now shows an arrangement 9 according to the invention and a fuel injector 1 formed therewith, which is provided as a dual-fuel fuel injector, in the present case for operation with fuel gas and liquid fuel (although only one fuel gas nozzle valve of the fuel injector 1 is illustrated, in particular, a plurality of fuel gas nozzle valves of the fuel injector 1).
- the fuel gas nozzle valves may be e.g. a liquid fuel nozzle valve (not shown) may be arranged surrounding.
- the arrangement 9 comprises a chamber 11 or a delimited cavity, which is formed by means of a first housing element 3 of the fuel injector 1 and a second housing element of the fuel injector 1.
- the first housing element 3 has a recess, in particular a blind hole 13, which is worked by a frontal or boundary surface 15 to the second housing element 5 in the first housing element 3, the second housing element 5 further covers the blind hole 13 with his frontal or interface 17 with completion of the chamber 11th
- the chamber 11 is arranged between a first 19 and a second 21 (passage) receptacle of the arrangement 9, which receptacles 19, 21 are provided for a rod-shaped element 7, the receptacles 19, 21 apparent at opposite end faces 23, 25, ie a first 23 and a second end face 25, the chamber 11 open into this or open out at this.
- the receptacles 19, 21 are each formed as a drill channel, in particular as an axial bore.
- the first receptacle 19 extends here in the first housing element 3, the second receptacle 21 in the second housing element 5.
- the rod-shaped element 7 is, as Fig. 2 illustrates this somewhat emphasizing, in the receptacles 19, 21 with (relatively wide) radial play on each a section 27, 29 (a nozzle distant 27 and a nozzle nearer 29 section), in this respect in particular with a recording radial clearance, and occurs - in its longitudinal direction - through the chamber 11 therethrough.
- the rod-shaped element 7 is in this case a one-piece element, formed from a nozzle valve member section 31, a piston section 33, and a stilt section 35.
- the stilt section 35 which is in particular round-bar-shaped, passes through the chamber 11 in this case.
- a fuel gas nozzle assembly of the fuel injector 1 (not explicitly shown) can be opened and blocked, that is, by corresponding stroke control of the nozzle valve member portion 31 connected to the piston portion 33.
- the fuel gas nozzle assembly has one or more fuel gas nozzle openings, ie downstream of a valve seat 39 for the nozzle valve member portion 31.
- control oil is provided therein, alternatively, e.g. also liquid fuel.
- the nozzle valve member portion 31 is guided from the side of a fuel gas nozzle chamber 45 toward the piston portion 33, in particular in an axial bore 47 with still close radial clearance, wherein the fuel injector 1 is arranged by means of a barrier fluid seal against the passage of fuel gas into the control circuit around the nozzle valve member portion 31 around to be able to.
- a barrier fluid line 49 is guided to an annular space 51 which surrounds the nozzle valve member section 31 via a section. If suitably pressurized blocking fluid is supplied to the annular space 51 via the barrier fluid line 49, eg with a pressure level slightly above the fuel gas operating pressure level, thus putting the barrier fluid seal into operation, fuel gas leakage into the control circuit can be effectively prevented during injector operation.
- the stilt section 35 now continues the piston section 33 toward the nozzle-remote side of the fuel injector 1, the rod-shaped stilt section 35 being provided, in cooperation with a resilient element 53, in particular a helical compression spring, to introduce a closing force away from the rod-shaped element 7, ie to ensure reliable holding of the closed position with pressure-less injector 1 and to support the closing operation of the nozzle valve member portion 31 in the context of Schloishubterrorismen.
- the stilt section 35 immersed nozzle-remote here in a fuel gas storage 55 of the fuel injector 1, which preferably serves as an injector-internal passage memory.
- Anströmbar is the fuel gas storage 55 via a fuel gas line 57 of the fuel injector.
- pressurized fuel gas can be supplied, for example, to the fuel gas nozzle chamber 45 (via a further line 59 of the fuel injector, shown by dashed lines as an example).
- first 61 and a second 63 media side each depending on a receptacle 19, 21, i. the first 19 and second 21 recording, are connected to the chamber 1 1 and communicate with the chamber 11.
- the first media side 61 is in this case formed by the fuel gas storage 55, which communicates via the first receptacle 19 with the chamber 1 1 (via the annular gap around the rod-shaped
- the second media side 63 is formed by the hydraulic control circuit, in particular the control chamber 41 thereof, which also communicates with the chamber 11 via the second receptacle 21 (again via the annular gap around the rod-shaped element 7), ie the second media side 63 is a control fluid side.
- the assembly 9 further comprises an annular body 65 which is disposed in the chamber 11 and surrounds the rod-shaped element 7 with (relatively less) radial play, in particular ring-body radial play which the rod-shaped element 7 with (relatively less) radial clearance, insofar as the ring-body radial clearance, passes, ie with less radial clearance than the rod-shaped element 7 in the receptacles 19, 21 is conceded (recording-radial clearance).
- the radial clearance or the annular body radial clearance is so small that a media passage is substantially avoided, thus a (sliding) seal is realized on the rod-shaped element (s) 7.
- the annular body 65 is further in the chamber 11, independently of the rod-shaped element 7 (longitudinal) displaceable and provided, in particular effetntig-acted upon (pressurized by the media pressure of at least one of the media of the media pages 61, 63), in contact with an end face 23, 25 of Chamber 11 to arrive (and at the associated mouth section or the associated mouth 19a, 21a against
- the ring body 65 is formed disc-shaped, i. as a (cylinder) disc.
- a first end face 65a here faces the fuel gas side (first media side 61), the other end face 65b of the control fluid side (second
- Both end surfaces 65a, 65b which are flat, are in this case able to seal against an end face 23 or 25 of the chamber 1 1 when displaced therefrom, i. At the respective mouth 19a, 21a of a receptacle 19, 21.
- the ring body 65 - in injector operation - against one or the other end face 23, 25 of the chamber 11, thus the intended self-sealing or media separation between the media pages 61, 63
- the annular body 65 in the chamber 11 can be urged against an end face 23, 25 by operating the fuel injector 1, for example, so that the media is connected to the first 61 and second 63 media sides with a time offset.
- the annular body When first switching on only one medium, for example the fuel gas side, the annular body thus experiences a one-sided compressive load on the part of this media side 61 and is subsequently forced towards the mouth 21a of the receptacle 21 of the further media side 63, in the present example towards the mouth 21a of FIG Recording 21 of the control fluid side.
- the annular body 65 at this end face 65 a is only a pressure acting surface for the other medium (Control fluid) which is reduced to the annular surface, which overlaps with the mouth opening 21a (in the longitudinal direction of the rod-shaped element 7), while at the opposite end surface is the entire surface for pressure introduction available.
- annular body 65 is also given (sufficient) radial play to the peripheral wall of the chamber 11 (in this respect floating body 65), advantageously also a radial offset of guides 47 or receptacles 19, 21 along the rod-shaped element 7 be compensated if necessary, that is, by corresponding displacement of the annular body 65 caused by transverse force.
- a self-sealing is furthermore advantageously achieved even if one of the media pressure levels drops below a setpoint pressure. If the pressure gradient across the ring body 65 reverses, this is regularly sufficient with the invention to displace the ring body 65 toward the other end face 23 and bring it sealingly into abutment there. Thus, the media separation is always reliably guaranteed.
- one end face 65a, 65b can be, for example, surface-enlarged compared with the other end face 65b, 65a (with a (circumferential) chamfering, for example, self-centering of the ring body 65 in the chamber 11 can also be favored with media pressure loading).
- FIG. 3 shows now a broken sectional view of a fuel injector 1, in which the arrangement 9, in contrast to the embodiment of FIG. 2 has a further annular body 67, which is arranged in the chamber 1 1 and the rod-shaped element 7 with (relatively less) Radial game, insofar as in particular annular body radial clearance, surrounds or through which the rod-shaped element 7 passes with annular body radial clearance, ie
- the further (second) annular body 67 in this case lies opposite the annular body 65 (first annular body 65) in the direction of passage (from end face to end face) or longitudinal direction of extension.
- both annular body 65, 67 is so small that a media passage is substantially avoided, thus at both annular bodies 65, 67 a (sliding) seal on the (about) the rod-shaped (n ) Element 7 is realized.
- the arrangement 9 in the embodiment according to FIG. 3 has a third media side 69 which communicates with the chamber 11 via a conduit path 71 of the arrangement 9 provided for this purpose is.
- the conduction path 71 is guided radially to the chamber 11, for example formed as a groove in the end face 15 of the first housing element 3, or e.g. each by means of a groove in the adjacent end faces 15, 17 of the housing elements 3, 5, which in turn results in an advantageously simple manufacturability.
- the further annular body 67 in the chamber 1 1 is longitudinally displaceable independently of the rod-shaped element 7 and provided, in particular pressurized by media pressure, to come into contact with an end face 23 of the chamber 11 or be urged against an end face 23 ( and at the associated mouth 19a against
- End face 23 of the chamber 11 arrive or be forced and at the associated mouth
- the third media side 69 is in this case a barrier fluid side, which is formed by a barrier fluid circuit at the fuel injector 1.
- the medium of the third media side 69 is so far pressurized barrier fluid, in particular barrier oil, for example, provided with an operating pressure level, which is slightly above the operating pressure level of the fuel gas side, for example, 5 percent to 10 percent above, for example at 380 bar.
- a barrier fluid seal as described with the embodiment according to FIG. 2 can also be supplied with barrier fluid via the barrier fluid circuit.
- the annular bodies 65, 67 each have a bevelled end surface 65a, 67a which points in the direction of the other annular body 67, 65, and opposite thereto a planar contact surface 65b, 67b which points to an adjacent end face 25 or 23 of the chamber against which the respective contact surface 65b, 67b is able to seal.
- the beveled end surface 65a, 67a is enlarged in surface area in the sense of a pressure shoulder and is provided to influence the displacement and pressure characteristics of the annular body when the medium is pressurized in the chamber (in the desired manner). In addition, a self-centering is favored again.
- the annular body 65, 67 are acted upon by the barrier fluid pressure (via the provided radial gap 73 to the peripheral wall of the chamber 11 can at 65 b, 67 b of a respective annular body 65, 67th virtually the same on all sides stipulatechristbeetzung done the same), but due to the area ratios of the contact surface 65b, 76b and the pressure shoulder surface 65a, 67a but always a resultant compressive force on the annular body 65, 67 acts acting, which urges them towards the adjacent end face 25, 23 that is, the annular bodies 65, 67 are forced apart.
- ring bodies 65, 67 are in each case in turn given radial play in the chamber 11 (via the respective (circumferential) radial gap 73), if necessary (exceeding the absorbable transverse forces) a radial offset between the individual housing elements can also be achieved 3, 5 or the nozzle body 37 are balanced, that is, by corresponding radial displacement of the respective annular body 65, 67 in the chamber 1 first
- a self-sealing at the first 19a or second 21a orifice in injector operation is also advantageously ensured even if the pressure on the third media side 69 does not predominate in a sufficient manner.
- a temporary overpressure on a media side 61, 63 for example due to a pressure drop on the other media side 63, 61 (in particular, for example, in the context of an injection process)
- the annular body 65, 67 would both press against the opposite end face 23, 25 can thus again allow self-sealing.
- 4 now shows a further advantageous embodiment of an arrangement 9 for a fuel injector 1, which is formed essentially analogously to the embodiment according to FIG. 3, that is to say by means of two annular bodies 65, 67.
- the chamber is 11 in the arrangement shown in Fig. 4 by means of two recesses or recesses 13, 75, in particular blind holes, formed, which are each in one of the opposite boundary surfaces 15, 17 of the housing elements 3, 5 worked.
- this results in an advantageously simple manufacturability of the assembly 9, in particular also with regard to the leadership of the conduit 71 to the chamber 11, which can also be easily worked in one or both of the interfaces 15, 17, for example, in turn, as a groove .
- the conduction path 71 may, for example, advantageously (longitudinally) be guided centrally to the chamber 11, so that a quasi-symmetrical pressure distribution can be achieved when the chamber 1 1 flows over the conduction path 71.
- the rod-shaped element 7 in the case of this arrangement 9 is formed, for example, in the shape of a bolt, for example provided as a separate stilts section.
- the arrangement 9 according to FIG. 4 furthermore has a compression spring 77, ie in particular a force-exerting means or a force source for the medium-pressure-independent application of force Force in the annular body 65, 67, which compression spring 77 between the annular bodies 65, 67 is arranged and both
- Pressure shoulder surfaces 65a, 67a experience the barrier fluid pressure, while the contact surfaces 65b, 67b are decoupled via the seals 79 from the barrier fluid pressure. Nevertheless, with this
- Embodiment the ring bodies 65, 67 also conceded radial play, which is made possible by the elasticity of the ring seals 79.
- Fig. 6 shows yet another embodiment of the arrangement 9, in which the chamber 1 1 is formed dumbbell-shaped, that is with a first chamber part 1 la and a second chamber part I Ib, which communicates via the commercial web 11c, formed by a
- the chamber 11 is formed by means of three housing elements 3, 5, 81, wherein the first 3 and the second housing element 5 each have a recess 13, 75 or a blind hole in a respective interface 15, 17 to form the chamber 11 in which in this case formed chamber parts I Ia, 1 lb each an annular body 65, 67 is received.
- the third housing element 81 received between the first 3 and second 5 housing element, only the passage opening 11 c must be created here, which can be performed in a simple manner as a bore through the third housing member 81.
- the conduction path 71 on the part of the third media side 69 advantageously simple - as the different possible solutions are illustrated in Fig. 6 - in an interface of one of the housing elements 3, 5, 81 or in more than one interface of the housing elements 3, 5th 81 be worked next to, for example, as a (drilling) channel through, for example, the third housing element 81, here in turn, for example, radially guided to the chamber 11.
- a fuel injector 1 may have an arrangement 9 as discussed above with reference to FIGS. 2 to 6, for example also on a nozzle valve member section 31, e.g. alternatively or in addition to a barrier fluid seal.
- Anchor rod of the fuel injector 1 may be formed, for example, a pilot valve of the
- further applications of the arrangement 9 can be considered at the fuel injector 1, which can auftun in an individual case.
- a method is also proposed with the fuel injector 1, in which first the medium of the third media side 69 is connected to receive the injector operation, then the further media of the first 61 and second 63 media sides. Such a method can be used, for example, with a fuel assembly adapted to control the process. Injection device or an internal combustion engine are each carried out with such a fuel injector 1.
- control chamber remote from the nozzle
- Fuel gas line further line first media side second media side
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017000911.2A DE102017000911B3 (de) | 2017-02-02 | 2017-02-02 | Anordnung |
| PCT/EP2018/000035 WO2018141473A1 (de) | 2017-02-02 | 2018-01-25 | Anordnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3577335A1 true EP3577335A1 (de) | 2019-12-11 |
| EP3577335B1 EP3577335B1 (de) | 2023-10-11 |
Family
ID=61187260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18703682.7A Active EP3577335B1 (de) | 2017-02-02 | 2018-01-25 | Anordnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11725618B2 (de) |
| EP (1) | EP3577335B1 (de) |
| DE (1) | DE102017000911B3 (de) |
| FI (1) | FI3577335T3 (de) |
| WO (1) | WO2018141473A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021201086A1 (de) | 2021-02-05 | 2022-08-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Wasserstoffversorgungssystem, Verfahren zum Betreiben eines Wasserstoffversorgungssystems sowie Verwendung eines flüssigen wasserstoffhaltigen Trägermediums |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456219A (en) * | 1991-04-01 | 1995-10-10 | Caterpillar Inc. | Dual compression and dual expansion internal combustion engine and method therefor |
| DE19936667A1 (de) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common-Rail-Injektor |
| DE10133450A1 (de) * | 2001-07-10 | 2003-01-30 | Bosch Gmbh Robert | Magnetventil mit Steck-Drehverbindung |
| DE10207974A1 (de) * | 2002-02-25 | 2003-09-18 | Bosch Gmbh Robert | Geräuschoptimierte Einrichtung zum Einspritzen von Kraftstoff |
| DE10229418A1 (de) * | 2002-06-29 | 2004-01-29 | Robert Bosch Gmbh | Einrichtung zur Dämpfung des Nadelhubes an Kraftstoffinjektoren |
| DE112004002581D2 (de) * | 2004-01-12 | 2006-11-23 | Siemens Ag | Verfahren zum Festziehen einer Düsenspannmutter eines Injektors für die Kraftstoffeinspritzung sowie Injektor und Düsenspannmutter |
| US8459577B2 (en) * | 2008-07-08 | 2013-06-11 | Caterpillar Inc. | Decoupled valve assembly and fuel injector using same |
| JP5097652B2 (ja) * | 2008-09-05 | 2012-12-12 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁及び2部品の結合方法 |
| DE102008042154A1 (de) * | 2008-09-17 | 2010-03-18 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| US7942349B1 (en) * | 2009-03-24 | 2011-05-17 | Meyer Andrew E | Fuel injector |
| DE102009002742A1 (de) * | 2009-04-30 | 2010-11-04 | Robert Bosch Gmbh | Kraftstoff-Injektor |
| US8201543B2 (en) * | 2009-05-14 | 2012-06-19 | Cummins Intellectual Properties, Inc. | Piezoelectric direct acting fuel injector with hydraulic link |
| DE102012210625A1 (de) * | 2012-06-22 | 2013-12-24 | Robert Bosch Gmbh | Schaltventil für einen Kraftstoffinjektor |
| US9719474B2 (en) * | 2013-01-02 | 2017-08-01 | Regents Of The University Of Minnesota | Direct fuel injectors with variable injection flow rate |
| EP3018340A1 (de) * | 2014-11-05 | 2016-05-11 | C.R.F. Società Consortile per Azioni | Elektrische kraftstoffeinspritzdüse für ein einspritzsystem eines verbrennungsmotors |
| PL239838B1 (pl) * | 2016-09-02 | 2022-01-17 | Gaj Jablonski Wojciech | Zespół cylindra silnika oraz zbudowany z jego wykorzystaniem przeciwbieżny silnik spalinowy |
-
2017
- 2017-02-02 DE DE102017000911.2A patent/DE102017000911B3/de active Active
-
2018
- 2018-01-25 WO PCT/EP2018/000035 patent/WO2018141473A1/de not_active Ceased
- 2018-01-25 FI FIEP18703682.7T patent/FI3577335T3/fi active
- 2018-01-25 EP EP18703682.7A patent/EP3577335B1/de active Active
- 2018-01-25 US US16/480,484 patent/US11725618B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FI3577335T3 (fi) | 2024-01-15 |
| WO2018141473A1 (de) | 2018-08-09 |
| US11725618B2 (en) | 2023-08-15 |
| DE102017000911B3 (de) | 2018-06-28 |
| US20190390639A1 (en) | 2019-12-26 |
| EP3577335B1 (de) | 2023-10-11 |
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