WO2022218596A1 - Gasinjektor mit kurzer axialer bauweise - Google Patents
Gasinjektor mit kurzer axialer bauweise Download PDFInfo
- Publication number
- WO2022218596A1 WO2022218596A1 PCT/EP2022/054745 EP2022054745W WO2022218596A1 WO 2022218596 A1 WO2022218596 A1 WO 2022218596A1 EP 2022054745 W EP2022054745 W EP 2022054745W WO 2022218596 A1 WO2022218596 A1 WO 2022218596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas injector
- lubricant
- flexible sealing
- armature
- guide
- Prior art date
Links
- 238000013461 design Methods 0.000 title description 4
- 239000000314 lubricant Substances 0.000 claims abstract description 77
- 238000007789 sealing Methods 0.000 claims abstract description 75
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000005461 lubrication Methods 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 75
- 238000002485 combustion reaction Methods 0.000 description 15
- 230000004323 axial length Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 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
- F02M21/0275—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
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle valves
-
- 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
- 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
-
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- 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
- F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
-
- 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 a gas injector for injecting a gaseous fuel, in particular hydrogen or natural gas or the like, with a short axial and compact design.
- the gas injector is designed in particular for direct injection into a combustion chamber of an internal combustion engine.
- Gas injectors are known from the prior art in different configurations.
- a problem with gas injectors is inherent in the fact that due to the gaseous medium to be blown in, no lubrication by the medium is possible, as is possible, for example, with fuel injectors that inject gasoline or diesel. This results in excessive wear during operation compared to fuel! injectors for liquid fuels.
- fuel injectors that inject gasoline or diesel.
- a lateral installation is necessary.
- the gas injector according to the invention for blowing in a gaseous fuel with the features of claim 1, on the other hand, has the advantage that the gas injector has a short axial overall length.
- the gas injector can be arranged in particular on the side of a combustion chamber of an internal combustion engine.
- the gas injector can nevertheless be made very slim and, in particular, with a small external diameter.
- the gas injector with a magnetic actuator an armature, an inner pole and a coil.
- the gas injector includes a closing element with a valve needle, which opens and closes a gas path for the gaseous fuel at a valve seat.
- the armature is connected to the closing element.
- a closed lubricant space is provided, which is filled with lubricant and in which the movable armature is arranged.
- the lubricant ensures that the armature is lubricated so that the armature does not wear out during operation.
- the lubricant chamber comprises at least one flexible sealing element, in particular a bellows, which seals off the lubricant chamber from the gas path and thus ensures the axial mobility of the closing element.
- the gas injector includes a restoring element, in particular a closing spring in the form of a cylinder spring, the restoring element returning the closing element to a closed initial position.
- a first needle guide is also formed between a guide sleeve and the valve needle of the closure member.
- the first needle guide is arranged within the flexible sealing element in the lubricant chamber and the restoring element is also arranged at least partially within the flexible sealing element in the lubricant chamber.
- the restoring element is preferably arranged entirely within the flexible sealing element.
- the flexible sealing element, the first needle guide and the restoring element are thus arranged one inside the other.
- the lubricant space also ensures a long service life for the magnetic actuator, since very little wear occurs, particularly on the needle guide and on the armature, as well as on components that can be brought into contact with the armature.
- the flexible sealing element is preferably a metal bellows.
- the metal bellows provides very good mobility in order to enable the axial movements of the closing element and, on the other hand, the metal bellows can be arranged as close as possible to the hot combustion chamber of the internal combustion engine. As a result, an axial length of the gas injector can be further reduced.
- the flexible sealing element is a plastic bellows or a membrane or a rubber element. The flexible sealing element is particularly preferably attached directly to the valve needle and directly to the guide sleeve.
- the valve needle preferably includes a fixing disk.
- the fixing disk can be designed in one piece with the valve needle or alternatively be provided as an annular disk which is connected to the valve needle, e.g. by means of a welded connection.
- a second needle guide is formed between the valve needle and the guide sleeve. Starting from the sealing seat of the closing element, the second needle guide is further away from the sealing seat than the first needle guide.
- the second needle guide is preferably also arranged within the flexible sealing element.
- the restoring element is preferably arranged completely in the guide sleeve.
- the restoring element is particularly preferably a cylinder spring which rests tightly on the valve needle.
- the guide sleeve has a shoulder on which the restoring element is supported with one end. More preferably, the other end is supported on a spring holder.
- the guide sleeve preferably has an inner shoulder, on which the restoring element is supported at one end.
- the gas injector includes a gas inlet which is arranged on the side of the gas injector.
- the gas inlet is preferably arranged laterally on a main body of the gas injector.
- the lateral gas inlet is preferably provided at an angle of 90° to a longitudinal axis of the gas injector.
- the gas injector has a flat sealing seat.
- the closing element preferably comprises a sealing disk on an end directed towards the combustion chamber, which has one or more sealing disks on a valve seat passage openings releases.
- the gas injector is preferably designed as an outwardly opening injector.
- a sealing seat can be provided which lies in a plane perpendicular to the longitudinal direction of the gas injector.
- the gas injector also preferably comprises a braking device which is arranged in the lubricant chamber and is set up to brake the closing element from the open to the closed state during a resetting process of the gas injector.
- the braking device comprises a braking bolt, a damping space which is in fluid communication with the lubricant space, and an elastic braking element, in particular a spring.
- the braking bolt and the elastic braking element are in operative connection with the closing element and/or the armature during the resetting process, with the braking bolt also being set up during the resetting process to displace lubricant from the damping chamber in order to dampen resetting of the braking bolt.
- the provision of the damping chamber can prevent the formation of vapor bubbles in the liquid lubricant when the hydraulic sticking is overcome, see above that in particular wear due to cavitation can be prevented.
- the braking process is additionally supported by the acceleration of the additional masses provided by the braking device. Furthermore, a further deceleration is realized by the displacement of the lubricant between the armature and the brake bolt. A return speed of the closing element can also be further reduced by friction of guide elements or the like with the braking bolt. All this reduces the impact force of the anchor at the stop, so that the service life of the anchor can be further extended.
- the brake bolt comprises in particular a main body with a contact surface which is arranged on a side of the main body of the brake bolt facing the locking element and can be brought into operative connection with the locking element and serves as a stop surface.
- the main body is preferably cylindrical.
- the to the closing element directed side of the main body arranged an annular flange.
- the annular flange preferably serves as a stop surface.
- the elastic braking element of the braking device is arranged in the damping space.
- the elastic braking element is preferably a compression spring, in particular a cylinder spring.
- the damping space is in fluid communication with the lubricant space via a guide play of the brake bolt.
- the gas injector also includes a throttle which connects the damping space to the lubricant space.
- the throttle ensures that the damping process can run in a defined manner, since the lubricant is then transferred from the damping chamber to the lubricant chamber via the throttle.
- the throttle is preferably a small connecting hole between the damping chamber and the lubricant chamber.
- the damping behavior of the braking device can be adjusted by selecting the geometric dimensions of the connecting bore, for example the diameter and/or length of the bore.
- the gas injector further preferably comprises an anchor bolt which bears against the closing element, the anchor bolt being connected to the anchor.
- An end of the anchor bolt facing away from a sealing seat of the gas injector is designed to come into contact with the brake bolt when the gas injector is in the closed state.
- the gas injector preferably includes an anchor bolt guide in which the anchor bolt is guided.
- the anchor bolt guide forms a stop for the brake bolt.
- a first gap exists between the anchor bolt guide and the brake bolt.
- this first gap is overcome by the compressive force of the spring of the braking device, which acts on the braking bolt.
- the gas injector comprises a guide body which is arranged in the lubricant chamber and has a guide area for guiding the brake bolt.
- the guide body preferably has a recess, in particular at an end of the guide body directed toward the sealing seat, in which the brake bolt is guided.
- the first gap between the brake bolt and the armature bolt guide preferably has a first width B, which is smaller than a second gap with a second width C between the armature and the inner pole.
- the axial gap B between the armature bolt guide and the brake bolt is preferably in a range from 1% to 90% of the axial gap C between the armature and the inner pole.
- the axial gap B between the anchor bolt guide and the brake bolt is particularly preferably smaller than 25% of the axial gap C, more preferably in a range from 3% to 20% of the axial gap C.
- the axial gap C preferably has a size of 0.05 mm to 3 mm, in particular 0.8 mm.
- the flexible sealing element of the lubricant space preferably comprises a first and a second flexible sealing element.
- the lubricant chamber is thus sealed off by two flexible sealing elements, which means that if the lubricant is displaced in the lubricant chamber, it can be prevented that an unfavorable overpressure or negative pressure develops, which, for example, can exert an unwanted force on the closing element of the gas injector via components of the lubricant reservoir.
- An accumulator spring exerts a predetermined force on the lubricant in the closed lubricant space, preferably from the outside.
- An overpressure of between 0.5 and 10.times.10.sup.5 Pa is preferably exerted here, particularly preferably 1 to 5.times.10.sup.5 Pa.
- the first flexible sealing element is a first bellows and the second flexible sealing element is a second bellows. More preferably, the first and second bellows are identical, i.e. have the same mean bellows diameter and the same number of bellows corrugations. In this way, in particular, the production costs of the gas injector can be reduced.
- the second bellows is more preferably connected to the accumulator spring via a spring plate.
- a simple and cost-effective structure can be implemented.
- a certain pretension can be exerted directly on the second bellows by means of the accumulator spring, as a result of which the rigidity of the second bellows is slightly increased compared to the first bellows.
- the first and second flexible sealing elements are each a membrane or each a rubber element.
- the membrane can be single-layer or multi-layer and can be fixed, for example by means of laser welding, to the respective components for sealing the lubricant chamber.
- An oil in particular mineral oil, is preferably used as the lubricant.
- a liquid fuel in particular diesel or petrol, is used.
- a grease is used as a lubricant.
- FIG. 1 shows a schematic sectional view of a gas injector according to a first exemplary embodiment of the invention.
- a gas injector 1 according to a first preferred exemplary embodiment of the invention is described in detail below with reference to FIG.
- the gas injector 1 for introducing a gaseous fuel comprises a magnetic actuator 2, which moves an outwardly opening closing element 3 from a closed state into an open state.
- FIG. 1 shows the closed state of the gas injector.
- the magnetic actuator 2 includes an armature 20 which is connected to the closing element 3 by means of an armature bolt 24 . Furthermore, the magnetic actuator 2 includes an inner pole 21, a coil 22 and a magnet housing 23, which ensures a magnetic yoke of the magnetic actuator.
- the gas injector 1 comprises a main body 7 with a lateral gas inlet 70 through which the gaseous fuel is supplied.
- a valve housing 8 in which the magnetic actuator 2 is arranged is fixed to the main body 7 .
- the valve housing 8 is followed by a housing sleeve 19 and a valve tube 90, at the free end of which a sealing seat 11 is provided on a valve seat component 93, at which the closing element 3 opens and closes a passage for the gaseous fuel.
- FIG. 1 shows an electrical connection 13, which is routed through the main body 7 and the magnet housing 8 to the magnet actuator 2.
- the reference numeral 10 designates a resetting element for the closing element 3 in order to reset it back into the closed state shown in FIG. 1 after an opening process.
- FIG. 1 also shows a gas flow as a gas path 14 through the gas injector 1 .
- the gas flow begins at the gas inlet 70 and is then diverted into an annular space 80 between the valve housing 8 and the Main body 7.
- the gas flow 14 continues past an outer area of the magnetic actuator 2 through a filter 15 to in front of the sealing seat 11. Corresponding openings are provided in the respective components, not all of which are shown in FIG.
- the gaseous fuel then flows past the outer circumference of the magnetic actuator 2 and the opened sealing seat 11 into a nozzle attachment 94 and into a combustion chamber 100 of an internal combustion engine, which is indicated by the arrows A in FIG.
- the closing element 3 comprises a valve needle 30 with a seat disk 30a, which is arranged on the end of the closing element directed toward the combustion chamber.
- the sealing seat 11 is formed between the seat plate 30a and the valve seat component 93, which has a plurality of axial openings 92.
- a fixing disc 30b is also provided on the closing element 3 and is arranged at a distance from the seat plate 30a in the direction of the magnetic actuator 2 .
- the closing element 3 thus releases the gas path 14 at the sealing seat 11 and closes it.
- a first needle guide 31 and a second needle guide 32 are provided between the closing element 3 and a guide sleeve 9, as can be seen in detail from FIG.
- the first needle guide 31 is formed directly between the closing element 3 and the guide sleeve 9 .
- the second needle guide 32 is formed between a spring plate 16 and the guide sleeve 9 .
- the spring plate 16 is firmly connected to the closing element 3 , with the restoring element 10 being supported between an inner shoulder 90a of the guide sleeve 9 and the spring plate 16 .
- the gas injector 1 comprises a closed lubricant space 4.
- the closed lubricant space 4 is completely or partially filled with a liquid lubricant, e.g. oil.
- the lubricant chamber 4 by a first flexible sealing element 51, the inner pole 21, the magnet housing 23, a Guide body 18 and a second flexible sealing element 52 defined.
- the first and second flexible sealing element 51, 52 is each designed as a bellows.
- the first and second flexible sealing element 51, 52 is of the same design.
- the flexible sealing elements 51, 52 can also be, for example, a membrane or a hose or the like instead of a bellows.
- the second flexible sealing element 52 is fixed to an accumulator spring plate 41, for example by means of a welded connection.
- the gas injector 1 includes an accumulator compression spring 40 which is supported on the main body 7 and pretensions the second flexible sealing element 52 via the accumulator spring plate 41 .
- Connecting bores 18a are provided in the guide body 18 so that the lubricant located in the lubricant chamber 4 is also located in the area within the second flexible sealing element 52 .
- the first flexible sealing element 51 is fixed directly to the locking element 3 on the fixing disc 30b and is connected to the guide sleeve 9 at the other end.
- transverse bores 91 are provided in the guide sleeve 9 so that there is a fluid connection between the interior of the first flexible sealing element 51 and the interior of the guide sleeve 9 .
- the lubricant chamber 4 has two flexible sealing elements 51, 52 and the accumulator pressure spring 40.
- the accumulator pressure spring 40 exerts a certain preload, for example 1 ⁇ 10 5 Pa, on the lubricant located in the lubricant space 4 . If, during an opening process, the lubricant is displaced by the stroke of the closing element 3 or by thermal expansion or cooling of the lubricant, any overpressure/negative pressure that may arise inside the lubricant chamber 4 can be caused by deflection at the second flexible sealing element 52 in conjunction with a contraction of the Storage pressure spring 40 are compensated. Thus, the flexible sealing element 51 cannot exert any undesired force on the closing element 3 acting via the bellows effective surface.
- the anchor bolt 24 with the anchor 20 fixed thereto is also arranged in the closed lubricant chamber 4 . Since the lubricant chamber 4 with a Lubricant, for example a liquid fuel such as gasoline or diesel or a grease or the like is filled, continuous lubrication of the armature 20 is given. In this way, the problem that occurs in the prior art with gaseous fuels, namely that the moving parts are not lubricated, can be compensated for.
- a Lubricant for example a liquid fuel such as gasoline or diesel or a grease or the like
- a filling channel 17a is provided for filling the closed lubricant space 4 .
- the filling channel 17a is sealed in a fluid-tight manner by means of a sealing ball 17 .
- the first needle guide 31, which is formed between the guide sleeve 9 and the valve needle 30, is now arranged inside the first flexible sealing element 51. Furthermore, part of the restoring element 10 is also arranged inside the first flexible sealing element 51 . A part of the guide sleeve 9 is also arranged inside the first flexible sealing element 51 .
- the restoring element 10, the guide sleeve 9 and the first flexible sealing element 51 are arranged one inside the other. As a result, an overall axial length of the gas injector 1 can be significantly reduced.
- valve needle 30 Despite the nesting of valve needle 30, restoring element 10, guide sleeve 9 and first flexible sealing element 51, an outer diameter, particularly in the area of valve tube 90, is not increased.
- the accumulator compression spring 40 and the accumulator spring plate 41 are at least partially arranged in the second flexible sealing element 52 .
- a region of the guide body 18 is also arranged inside the second flexible sealing element 52 .
- the nozzle attachment 94 can also be dispensed with if the installation space conditions make this necessary.
- the gaseous fuel is fed in laterally through the lateral gas inlet 70 and not in the axial direction, as was previously the case with gas injectors. This further reduces the overall length of the gas injector, particularly in the area of the gas injector facing away from the combustion chamber.
- a braking device 6 is also arranged in the closed lubricant space 4 .
- the braking device 6 comprises a braking bolt 60, a braking spring 61 and a damping chamber 62.
- the damping chamber 62 is in fluid communication with the lubricant chamber 4.
- the braking bolt 60 and the elastic braking element 61 are in an operative connection with the closing element 3 when the gas injector returns to the closed initial position to achieve in the closed state of the gas injector ( Figure 1).
- the brake bolt 60 is guided in the guide body 18 .
- the damping space 62 is formed directly on the brake bolt 60 on a side of the brake bolt 60 facing away from the valve seat 11 .
- the damping chamber 62 is connected to the connecting bores 18a and thus to the main area of the lubricant chamber 4 via a throttle 63, which is a small bore.
- the brake spring 61 is arranged in a spring space 67 .
- the brake bolt 60 has a contact surface 60a which is in contact with the anchor bolt 24 .
- the brake bolt guide 25 guides the anchor bolt 24 during an opening and closing process.
- the braking spring 61 is arranged between the braking bolt 60 and the guide body 18 .
- the brake bolt 60 has a flange which is provided with play relative to the guide body 18 .
- a passage 65 which can be formed, for example, as a slot on the end of the guide body 18 directed towards the anchor bolt guide 25 .
- a fluid connection for the lubricant from the spring chamber 67 via the guide play and the passage 65 to the lubricant chamber 4 can thus be provided.
- the first gap 101 is also formed between the contact surface 60a of the brake bolt 60 and the anchor bolt guide 25 .
- the gap 101 has a first width B, which is smaller than a second width C between the armature 20 and the inner pole 21 (see FIG. 1) at a second gap 102. This ensures that a stroke of the brake bolt 60, which is prestressed in the axial direction by the compression spring 61, is smaller than a stroke of the armature 20. This allows sufficient fluid to flow from the lubricant chamber 4 via the throttle 63 into the damping chamber 62 during the injection process.
- the anchor bolt 24 hits the contact surface 60a of the brake bolt 60.
- the brake bolt 60 is pressed against the fluid in the damping chamber 62. Because of the throttle 63, the fluid cannot be pressed out of the damping chamber 62 immediately, but rather slowly, so that a damping effect is made possible during the closing process. This prevents excessive wear on the sealing seat 11 and on the armature 20, since the closing process is dampened by the return of the brake bolt 60.
- the damping process is further supported by the braking spring 61 and hydraulic adhesion of the braking bolt 60 to the anchor bolt guide 25 .
- the damping space 62 can prevent cavitation during the closing process in this area between the anchor bolt guide 25 and the contact surface 60a of the brake bolt 60 . Friction of the brake bolt 60 in the guide body 18 also delays the restoring process as well as the masses of the moving components to be accelerated in the entire lubricant chamber 4, which leads to displacement of the lubricant in the closed lubricant chamber 4 and thus to additional braking during the closing process.
- the damping behavior can be adjusted individually for the respective gas injector.
- a stop surface between the damping bolt 60 and the anchor bolt guide 25 can be wedge-shaped, ie not at right angles to a central axis XX of the gas injector.
- radial slots may be provided, whereby a cavitation effect is further reduced and prevented.
- the gas injector 1 shown in FIG. 1 is pressure force balanced.
- This means that the closing element 3 is connected to the guide sleeve 9 via the first flexible sealing element 51, with the first flexible sealing element 51 designed as metal bellows having a mean diameter which is equal to a diameter on the sealing seat 11 on which the closing element 3 seals.
- the first flexible sealing element 51 designed as metal bellows having a mean diameter which is equal to a diameter on the sealing seat 11 on which the closing element 3 seals.
- the closing element 3 when the closing element 3 has been placed in the open state (movement of the closing element 3 to the left in Figure 1) by actuating the magnetic actuator 2 and gas is being injected, reliable damping is imminent when the closing element 3 is reset the closing element is pressed into the valve seat 11 can be carried out.
- the brake bolt 60 is pressed in the direction of the damping chamber 62 by the anchor bolt 24 and moves only as slowly as the lubricant is pressed out of the damping chamber 62 through the throttle 63 into the lubricant chamber 4 .
- a closing speed of the closing element 3 is braked significantly and effectively before the closing element hits the valve seat 11 .
- the sealing seat 11 is designed as a flat sealing seat, so that the sealing surfaces on the seat plate 30a and the valve seat component 91 can be produced easily, e.g. by surface processing such as lapping.
- the gas injector 1 can thus have reduced wear on the moving parts, in particular on the valve seat 11, armature 20 and in the armature bolt 24, provide. Furthermore, heat dissipation from the magnetic actuator 2 can be significantly improved by the sealed lubricant chamber 4 with a liquid lubricant. Furthermore, the two flexible sealing elements 51 , 52 can prevent unwanted forces from acting on the closing element 3 .
- the gas injector 1 can have a significantly reduced axial length, so that in particular a lateral installation on a combustion chamber 100 of an internal combustion engine is possible. Since, in addition to the nesting of components of the gas injector, a lateral gas inlet 70 is also provided, the axial overall length of the gas injector 1 is significantly reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023562875A JP2024514164A (ja) | 2021-04-15 | 2022-02-25 | 軸方向が短い構造方式をもつガスインジェクタ |
CN202280042987.6A CN117545916A (zh) | 2021-04-15 | 2022-02-25 | 具有短的轴向结构的气体喷射器 |
KR1020237038880A KR20230169301A (ko) | 2021-04-15 | 2022-02-25 | 짧은 축 설계의 가스 인젝터 |
US18/554,974 US20240209821A1 (en) | 2021-04-15 | 2022-02-25 | Gas injector having a short axial design |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021203738.0 | 2021-04-15 | ||
DE102021203738.0A DE102021203738A1 (de) | 2021-04-15 | 2021-04-15 | Gasinjektor mit kurzer axialer Bauweise |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022218596A1 true WO2022218596A1 (de) | 2022-10-20 |
Family
ID=80683807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/054745 WO2022218596A1 (de) | 2021-04-15 | 2022-02-25 | Gasinjektor mit kurzer axialer bauweise |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240209821A1 (de) |
JP (1) | JP2024514164A (de) |
KR (1) | KR20230169301A (de) |
CN (1) | CN117545916A (de) |
DE (1) | DE102021203738A1 (de) |
WO (1) | WO2022218596A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024056223A1 (de) * | 2022-09-14 | 2024-03-21 | Robert Bosch Gmbh | Gasinjektor mit dämpfer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022206350A1 (de) * | 2022-06-24 | 2024-01-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit sehr guten Dämpfungseigenschaften im Betrieb |
DE102022213079A1 (de) * | 2022-12-05 | 2024-06-06 | Robert Bosch Gesellschaft mit beschränkter Haftung | Injektor zur dosierten Abgabe von Brennstoff |
DE102022213824A1 (de) * | 2022-12-19 | 2024-06-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Injektor für gasförmige oder flüssige Brennstoffe |
CN116378862B (zh) * | 2023-03-21 | 2024-05-03 | 一汽解放汽车有限公司 | 气体喷射装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041544A1 (de) * | 2008-08-26 | 2010-03-04 | Robert Bosch Gmbh | Ventil zur Zumessung eines flüssigen oder gasförmigen Mediums |
DE102009027528A1 (de) * | 2009-07-08 | 2011-01-20 | Robert Bosch Gmbh | Vorrichtung zum Einspritzen von Kraftstoff |
WO2017167558A1 (de) * | 2016-03-31 | 2017-10-05 | Robert Bosch Gmbh | Injektor zum einblasen eines gasförmigen brennstoffs in einen brennraum |
-
2021
- 2021-04-15 DE DE102021203738.0A patent/DE102021203738A1/de active Pending
-
2022
- 2022-02-25 JP JP2023562875A patent/JP2024514164A/ja active Pending
- 2022-02-25 CN CN202280042987.6A patent/CN117545916A/zh active Pending
- 2022-02-25 WO PCT/EP2022/054745 patent/WO2022218596A1/de active Application Filing
- 2022-02-25 KR KR1020237038880A patent/KR20230169301A/ko unknown
- 2022-02-25 US US18/554,974 patent/US20240209821A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041544A1 (de) * | 2008-08-26 | 2010-03-04 | Robert Bosch Gmbh | Ventil zur Zumessung eines flüssigen oder gasförmigen Mediums |
DE102009027528A1 (de) * | 2009-07-08 | 2011-01-20 | Robert Bosch Gmbh | Vorrichtung zum Einspritzen von Kraftstoff |
WO2017167558A1 (de) * | 2016-03-31 | 2017-10-05 | Robert Bosch Gmbh | Injektor zum einblasen eines gasförmigen brennstoffs in einen brennraum |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024056223A1 (de) * | 2022-09-14 | 2024-03-21 | Robert Bosch Gmbh | Gasinjektor mit dämpfer |
Also Published As
Publication number | Publication date |
---|---|
CN117545916A (zh) | 2024-02-09 |
JP2024514164A (ja) | 2024-03-28 |
US20240209821A1 (en) | 2024-06-27 |
KR20230169301A (ko) | 2023-12-15 |
DE102021203738A1 (de) | 2022-10-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2022218596A1 (de) | Gasinjektor mit kurzer axialer bauweise | |
EP4285017A1 (de) | GASINJEKTOR MIT REDUZIERTEM VERSCHLEIß UND DÄMPFUNGSEINRICHTUNG | |
EP4176170B1 (de) | Gasinjektor mit reduziertem verschleiss | |
DE112016003592B4 (de) | Kraftstoffeinspritzvorrichtung | |
EP3822475B1 (de) | Ventil zum zumessen eines fluids | |
DE102021200688A1 (de) | Gasinjektor mit austauschbaren Bauteilen | |
EP4264035A1 (de) | GASINJEKTOR MIT REDUZIERTEM VERSCHLEIß | |
DE102017218267B4 (de) | Fluidventil und Verfahren zur Steuerung der Zufuhr von Fluid | |
DE10140799A1 (de) | Brennstoffeinspritzventil | |
DE102020210145A1 (de) | Gasinjektor mit mehreren Ventilnadeln | |
DE102004015744A1 (de) | Common-Rail-Injektor | |
EP2816219B1 (de) | Steuerventil für einen Kraftstoffinjektor | |
DE102016220326A1 (de) | Ventil zum Zumessen eines gasförmigen oder flüssigen Kraftstoffs | |
WO2023247088A1 (de) | Gasinjektor mit sehr guten dämpfungseigenschaften im betrieb | |
WO2022258246A1 (de) | Gasinjektor mit dämpfungseinrichtung, insbesondere für kurze hübe | |
WO2023217428A1 (de) | Gasinjektor mit robuster nadelführung | |
DE102022204538A1 (de) | Gasinjektor mit kompakter Bauweise | |
DE10353641B4 (de) | Brennstoffeinspritzventil | |
DE102008042531A1 (de) | Ventilanordnung zur Kraftstoffhochdruckeinspritzung | |
DE102019205301A1 (de) | Ventil zum Zumessen eines Fluids | |
EP2596229B1 (de) | Kraftstoffeinspritzventil mit trockenem magnetaktor | |
WO2024132257A1 (de) | Gasinjektor mit optimiertem ventilgehäuse | |
DE102023200242A1 (de) | Gasinjektor mit Doppeldämpfer | |
DE102022209615A1 (de) | Gasinjektor mit Ausgleichsmasse | |
DE102007012920A1 (de) | Hydraulischer Koppler |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22708904 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202317068791 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023562875 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18554974 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20237038880 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020237038880 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280042987.6 Country of ref document: CN |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22708904 Country of ref document: EP Kind code of ref document: A1 |