EP4544168A1 - Gasinjektor mit sehr guten dämpfungseigenschaften im betrieb - Google Patents
Gasinjektor mit sehr guten dämpfungseigenschaften im betriebInfo
- Publication number
- EP4544168A1 EP4544168A1 EP23720149.6A EP23720149A EP4544168A1 EP 4544168 A1 EP4544168 A1 EP 4544168A1 EP 23720149 A EP23720149 A EP 23720149A EP 4544168 A1 EP4544168 A1 EP 4544168A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas injector
- piston
- closing
- flexible sealing
- lubricant
- 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.)
- Withdrawn
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
- 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
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0275—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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
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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
-
- 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
- F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/02—Fuel-injection apparatus having means for reducing wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—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
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms
-
- 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 blowing in a gaseous fuel, in particular hydrogen or natural gas or the like, with a compact design and very good damping properties both during an opening process and during a closing process of a closing element of the gas injector.
- 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 designs.
- One problem area with gas injectors is, due to their principle, that due to the gaseous medium to be injected, no lubrication through the medium is possible, as is possible, for example, with fuel injectors that inject gasoline or diesel.
- the closing element in particular a valve needle
- flexible sealing elements such as bellows. During operation, this makes it possible for vibration excitations to occur due to the gaseous fuel, which can in particular negatively influence the actuation of the closing element in the opening or closing process.
- the gas injector according to the invention for blowing in a gaseous fuel with the features of claim 1, however, has the advantage that vibration excitation of components of the gas injector can be suppressed both during the opening process and during the closing process. This results in very precise adherence to specified injection quantities, opening times and closing times when operating the gas injector. In particular, excitation of longitudinal vibrations of a closing element can be prevented. This avoids damage to flexible elements, such as metal bellows, in the gas injector, which ensure the mobility of the closing element in the axial direction of the gas injector.
- the gas injector comprises a magnetic actuator with an armature, an inner pole and a coil.
- the gas injector comprises a closing element with a valve needle, which opens and closes a gas path for the gaseous fuel at a sealing seat.
- the sealing seat is arranged at a first end of the gas injector and the gas injector is preferably an injector that opens to the outside.
- the anchor is connected to the closing element.
- a closed lubricant space is provided, which is filled with lubricant and in which the movable anchor is arranged. The lubricant ensures that the armature is lubricated so that no wear occurs on the armature during operation.
- the lubricant space here comprises at least a first flexible sealing element, in particular a bellows, which seals the lubricant space from the gas path and thus ensures the axial mobility of the closing element, as well as a second flexible sealing element which provides a compensation space for the lubricant space.
- the gas injector comprises a restoring element, in particular a closing spring in the form of a cylinder spring, wherein the restoring element returns the closing element to a closed starting position.
- the gas injector further comprises an opening brake device, which reduces a load on the first flexible sealing element and the second flexible sealing element during the opening process, and a closing brake device, which reduces a load on the first flexible sealing element and the second flexible sealing element as well as the sealing seat during the closing process.
- the opening brake device reduces a load on the valve assembly and in particular on the first flexible element, which is arranged on the closing element.
- the opening brake device also compensates for the fact that in gas injectors a stroke of the closing element is very large compared to gasoline or diesel fuel injectors, which tends to increase the susceptibility of components of the gas injector to vibration and to a high level Load and wear on the opening stop surfaces between the armature and the inner pole.
- the invention can significantly counteract this.
- the closing brake device also ensures during the closing process that the load on the flexible sealing elements remains low and that the closing element does not hit the sealing seat with too much force, which on the one hand can lead to damage to the components and on the other hand so-called “bouncing” may occur in which the closing element After closing, it briefly lifts off the sealing seat again due to the force of the closing process, so that additional gas is briefly introduced into the combustion chamber, which cannot be used.
- the gas injector comprises an anchor bolt, which is arranged in the lubricant space and/or is connected to the closing element.
- the opening brake device and/or the closing brake device are arranged on the anchor bolt. This can ensure a particularly compact design of the gas injector. By positioning the opening brake device and/or the closing brake device inside the lubricant chamber, hydraulic damping can also be achieved both in the opening process and in the closing process.
- the opening brake device preferably comprises a first piston, a first damping spring and a first damping space. Further preferably, the closing brake device comprises a second piston, a second damping spring and a second damping space.
- the opening brake device further preferably comprises a stop ring, which is preferably arranged on the anchor bolt and only enables damping in the opening process with a delay. This ensures that the damping during the opening process only begins towards the end of the opening stroke.
- the second piston is preferably arranged at least partially, preferably completely, in the first piston.
- the anchor bolt is preferably passed through the first and second pistons. The first and second pistons of the two braking devices are therefore annular.
- the first piston has a shoulder on an inner circumference as a stop for the second piston. This further increases the integration of the first and second pistons into each other, so that the installation space and structure of the gas injector can be further reduced.
- the second piston is arranged with play on the anchor bolt. This achieves a rapid onset of the damping effect, particularly during the closing process.
- a spring force of the first damping spring of the opening brake device is greater than a spring force of the second damping spring of the closing brake device.
- the spring force of the first damping spring is preferably at least twice as large as the spring force of the second damping spring. This can also ensure that the damping during the opening process only begins towards the end of the complete opening stroke.
- the anchor bolt has a shoulder on which the second piston of the closing brake device is arranged.
- the anchor preferably has passage openings for the lubricant.
- the anchor bolt is guided in a guide disk.
- the guide disk preferably also serves to support the first damping spring of the opening brake device.
- the guide disk further preferably has an axially projecting ring shoulder, which preferably projects at least partially into the anchor, which has a corresponding recess.
- the first damping spring is preferably arranged between the guide disk and the first piston.
- the second damping spring is preferred arranged between a storage body, which is arranged in the lubricant space, and the second piston.
- the first and second flexible elements are preferably a bellows, in particular a metal bellows.
- a first diameter of the first flexible element is preferably smaller than a second diameter of the second flexible element.
- the gas injector comprises a first, second and third needle guide, which guide the valve needle during the opening and closing processes.
- the first and second needle guides are arranged in the gas path and the third needle guide is arranged in the lubricant space.
- the restoring element is also arranged in the lubricant space.
- a first distance A1 between the first and second needle guides in the axial direction XX of the gas injector is smaller than a second distance A2 between the second and third needle guides in the axial direction XX.
- the second distance A2 is preferably at least twice as large, more preferably at least three times as large, as the first distance A1.
- the first and/or second and/or third needle guide each have an annular guide region which is connected to the valve needle of the closing element via webs, such that openings for fluid passage are present between the webs.
- first and second needle guides which are arranged in the gas guide area of the gas injector in order to allow the largest possible quantities of gas to flow through the first and second guide areas when the gas injector is open.
- the annular guide area is preferably closed along the entire circumference.
- a width of the annular guide area is chosen to be as small as possible.
- three webs are provided, which connect the valve needle to the annular guide area. The webs are preferably arranged at equal distances along the circumference.
- the webs between the valve needle and the annular guide areas are arranged at an acute angle to the annular guide area. This makes it possible for a flow cross section to be increased in the area of the guides, which is particularly advantageous for the first and second needle guides, which are located in the gas guide area.
- the webs are preferably arranged in the direction of flow through the openings after the guide area.
- the webs between the valve needle and the annular guide area of the needle guides are arranged at a right angle to the valve needle.
- a plate is also arranged on the valve needle, to which the first flexible sealing element is fixed. This makes it possible to achieve a simple connection between the closing element and the first flexible sealing element, which seals the lubricant space.
- the first and second needle guides are preferably guided on the same component.
- the component is preferably a cylindrical valve body on which the sealing seat is also arranged. This makes it possible for the guide surfaces for the first and second needle guides to be produced in one clamping, which offers great advantages in terms of manufacturing technology and further reduces manufacturing costs.
- the third needle guide is preferably also set up to support the restoring element, which is arranged in the lubricant space.
- the third needle guide can preferably be designed as a plate with openings for the lubricant during the opening and closing process of the closing element.
- the closing element with the three needle guides is preferably designed as a one-piece component. In this way, weld seams or the like can be avoided, which are often a source of contamination during operation of the gas injector, which can then lead to tightness problems at the sealing seat or the like.
- a multi-part closing element made up of individual elements welded together is also preferred for reducing machining volume and saving manufacturing costs.
- the first and/or second 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. This allows the axial length of the gas injector to be further reduced.
- the first flexible sealing element is a plastic bellows or a membrane or a rubber element.
- an electrical connection of the gas injector and/or a gas inlet of the gas injector is preferably arranged laterally on the gas injector.
- the gas injector further preferably has a conical sealing seat.
- the closing element comprises a sealing disk at an end directed towards the combustion chamber, which has one or more sealing disks on a sealing seat Clears through openings.
- the gas injector is preferably designed as an injector that opens to the outside. This allows a sealing seat to be provided, which blows the fuel gas into the combustion chamber in a hollow cone shape.
- An oil in particular a synthetic oil or mineral oil, is preferably used as the lubricant.
- a liquid fuel in particular diesel or gasoline, is used.
- a grease is used as a lubricant.
- Figure 1 is a schematic sectional view of a gas injector according to a first exemplary embodiment of the invention.
- Figure 2 is a schematic partial sectional view of the gas injector
- a gas injector 1 according to a first preferred embodiment of the invention will be described in detail below with reference to FIGS. 1 and 2.
- 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 to an open state.
- Figure 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 anchor bolt 24. Furthermore, the magnetic actuator 2 includes an inner pole 21, a coil 22 and a magnet housing 23, which ensures a magnetic inference of the magnetic actuator. Furthermore, the gas injector 1 comprises a main body 7 with a gas inlet 70 through which the gaseous fuel is supplied. The gas inlet 70 is arranged on the main body 7 in the axial direction XX. The main body 7 is connected to a valve housing 8, in which the magnetic actuator 2 is arranged.
- the valve housing 8 is adjoined by a housing sleeve 19, at the free end of which a sealing seat 11 is provided on a valve seat component 93, on which the closing element 3 opens and closes a passage for the gaseous fuel.
- FIG. 13 An electrical connection 13, which is guided through the main body 7 to the magnetic actuator 2, is shown schematically in FIG.
- the electrical connection 13 is arranged laterally on the main body 7.
- the reference number 10 denotes a restoring element for the closing element 3 in order to return it to 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 and leads through the main body 7.
- the gas flow 14 continues past an outer area of the magnetic actuator 2 through a filter 15 to the sealing seat 11.
- Corresponding openings are provided in the respective components , not all of which are shown in Figure 1.
- the closing element 3 comprises a valve needle 30 with a seat plate 30a, which is arranged at the end of the closing element directed towards the combustion chamber.
- the sealing seat 11 is formed between the seat plate 30a and the valve seat component 93, which is essentially a cylindrical tube.
- the closing element 3 further comprises a first needle guide 31, a second needle guide 32 and a third needle guide 33.
- the two needle guides 31, 32 are preferably formed in one piece with the valve needle 30.
- the gas injector 1 further comprises a closed lubricant space 4.
- the closed lubricant space 4 is completely or partially filled with a liquid lubricant, for example oil.
- the lubricant space 4 is defined by a first flexible sealing element 51, the inner pole 21, a sleeve 18, a storage body 17 and a second flexible sealing element 52.
- the first and second flexible sealing elements 51, 52 are each designed as metal bellows.
- the closing element 3 also includes a plate 34 on which the first flexible sealing element 51 is supported.
- a plurality of connecting bores 77 are formed in the storage body 17, which connect the interior region of the second flexible sealing element 52 with the other regions of the lubricant space 4.
- the second flexible sealing element 52 has a relatively large diameter, which is larger than the diameter of the first flexible sealing element 51.
- a storage pressure spring 40 is provided, which is supported on the main body 7.
- the second flexible sealing element 52 serves as a compensation space for the lubricant located in the lubricant space 4. This allows pressure fluctuations in the lubricant chamber 4 to be compensated for.
- the first flexible sealing element 51 is also fixed directly to the closing element 3 on the plate 34 and connected to a guide sleeve 35 at the other end.
- the third needle guide 33 is guided within the guide sleeve 35.
- the lubricant chamber 4 thus has two flexible sealing elements 51, 52 and the storage pressure spring 40.
- the storage pressure spring 40 exerts a certain preload, for example 1 x 10 5 Pa, on the lubricant located in the lubricant chamber 4. If, during an opening process, the lubricant is displaced by the stroke of the closing element 3 or also occurs due to thermal expansion or cooling of the lubricant, any excess pressure/negative pressure that may arise inside the lubricant space 4 can be compensated for by deflection on the second flexible sealing element 52 in conjunction with a contraction of the storage pressure spring 40. Thus, the first flexible sealing element 51 cannot exert any unwanted force on the closing element 3 acting via the bellows effective surface.
- the anchor bolt 24 with the anchor 20 fixed to it is also arranged in the closed lubricant space 4. Since the lubricant space 4 is filled with a lubricant, for example a liquid fuel such as gasoline or diesel or a grease or the like, the armature 20 is continuously lubricated. This makes it possible to compensate for the problem that occurs in the prior art with gaseous fuels, that there is a lack of lubrication of the moving parts.
- a lubricant for example a liquid fuel such as gasoline or diesel or a grease or the like
- the gas injector 1 further comprises an opening brake device 5, which reduces a load on the first and second flexible sealing elements 51, 52 and the anchor stop during the opening process, and a closing brake device 6, which reduces a load on the first and second flexible sealing elements 51, 52 and the sealing seat 11 during the closing process reduced.
- the opening brake device 5 comprises a first piston 53, a damping spring 54, a first damping space 55 and a stop ring 56, which is arranged on the anchor bolt 24 at its free end, which faces away from the sealing seat 11.
- the closing brake device 6 comprises a second piston 63, a second damping spring 64 and a second damping space 65.
- the opening brake device 5 and the closing brake device 6 are arranged within a central recess in the storage body 17.
- the opening brake device 5 and the closing brake device 6 are arranged on a side of the armature 20 facing away from the sealing seat 11 in the lubricant space 4.
- the first damping spring 54 is supported between a stationary guide disk 9, which is in a sleeve 18, which connects the inner pole 21 and the storage body 17, and the first piston 53.
- the first damping spring 54 is arranged in the first damping space 55.
- Lubricant is also present in the first damping space 55, since, as can be seen from Figure 2, the anchor bolt 24 is guided in the guide disk 9 and lubricant enters the damping space 55 via this guide gap.
- the guide disk 9 has a shoulder 91 which projects in the axial direction towards the sealing seat 11.
- a correspondingly designed recess 20a is provided in the armature 20, so that a volume of the lubricant in this area of the gas injector is reduced.
- the closing brake device 6 is arranged at the end of the anchor bolt 24 facing away from the sealing seat 11.
- the second damping spring 64 is arranged in the second damping space 65.
- the second damping spring 64 is arranged between the storage body 17 and the second piston 63.
- the second piston 63 is partially arranged within the first piston 64.
- a shoulder 25 is provided on the anchor bolt 24, which serves as a stop for the second piston 63.
- the reference number H1 shows the maximum stroke of the armature 20, which is equal to the maximum opening path of the closing element 3, as the first gap H1.
- a second gap H2 is provided between the stop ring 56 and the second piston 63.
- a third gap H3 is provided between the second piston 63 and the first piston 53 in the closed position.
- the function of the gas injector 1 is as follows. Starting from the closed position shown in Figures 1 and 2, the coil 22 is energized, whereby the armature 20 is pulled towards the inner pole 21 in the direction of arrow B (see Figure 2). Since the anchor 20 is firmly connected to the anchor bolt, the anchor bolt 24 is also moved in the direction of arrow B, whereby the closing element 3 lifts off the sealing seat 11 and an injection begins.
- the lubricant from the first damping chamber 55 flows through gaps between the first piston 53 and the anchor bolt 24 and the second piston 63 and the anchor bolt 24 into the second damping chamber 65 and through gaps between the first damping piston 53 and the storage body 17 and the first damping piston 53 and the second Damping piston 63 into the second damping space 65. There is also a flow across gaps between the anchor bolt 24 and the guide disk 9. It should be noted that the first piston 53 and the second piston 63 are each arranged with play on the anchor bolt 24 .
- the play between the two pistons and the anchor bolt 24 increases the restoring speed of the two pistons. It should be noted that instead of the play between the pistons and the anchor bolt 24, corresponding bores can also be formed in the first and second pistons, but this is more complex in terms of production technology than providing play for the anchor bolt 24.
- the spring force for resetting the first piston 53 is preferably twice as high as the spring force for resetting the second piston 63.
- the gas injector according to the invention can thus stimulate longitudinal vibrations of the first flexible sealing element 51 (first bellows) both during the opening process and during the closing process ) and the second flexible sealing element 52 (second bellows). Since such a longitudinal vibration would increase the number of bellows deflections, the invention can significantly increase the service life of the flexible sealing elements.
- the closing brake device 6 also prevents the closing element 3 from striking too strongly against the sealing seat 11 during the closing process. This reduces wear on the closing element and/or the sealing seat when closing the gas injector.
- the gas injector 1 shown in Figure 1 is balanced in terms of pressure force.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022206350.3A DE102022206350A1 (de) | 2022-06-24 | 2022-06-24 | Gasinjektor mit sehr guten Dämpfungseigenschaften im Betrieb |
| PCT/EP2023/060453 WO2023247088A1 (de) | 2022-06-24 | 2023-04-21 | Gasinjektor mit sehr guten dämpfungseigenschaften im betrieb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4544168A1 true EP4544168A1 (de) | 2025-04-30 |
Family
ID=86270945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23720149.6A Withdrawn EP4544168A1 (de) | 2022-06-24 | 2023-04-21 | Gasinjektor mit sehr guten dämpfungseigenschaften im betrieb |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4544168A1 (de) |
| KR (1) | KR20250027263A (de) |
| CN (1) | CN119768602A (de) |
| DE (1) | DE102022206350A1 (de) |
| WO (1) | WO2023247088A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7470254B2 (ja) * | 2021-05-12 | 2024-04-17 | 日立Astemo株式会社 | 燃料噴射装置 |
| GB2638423A (en) * | 2024-02-21 | 2025-08-27 | Phinia Delphi Luxembourg Sarl | Fuel injector |
| GB2640144A (en) * | 2024-04-03 | 2025-10-15 | Phinia Delphi Luxembourg Sarl | Gas injector for an internal combustion engine |
| CN118705091B (zh) * | 2024-06-13 | 2025-09-12 | 一汽解放汽车有限公司 | 一种气体喷射器 |
| DE102024125610A1 (de) | 2024-09-06 | 2026-03-12 | Schaeffler Technologies AG & Co. KG | Kraftstoffinjektor für gasförmigen Kraftstoff und Verfahren zum Betrieb eines Kraftstoffinjektors |
| DE102024209072A1 (de) * | 2024-09-23 | 2026-03-26 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor |
| DE102024209070A1 (de) * | 2024-09-23 | 2026-03-26 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor |
| DE102024209075A1 (de) * | 2024-09-23 | 2026-03-26 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008041544B4 (de) * | 2008-08-26 | 2016-05-12 | Robert Bosch Gmbh | Ventil zur Zumessung eines flüssigen oder gasförmigen Mediums |
| DE102020208273A1 (de) * | 2020-07-02 | 2022-01-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit reduziertem Verschleiß |
| DE102020216404A1 (de) * | 2020-12-21 | 2022-06-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit reduziertem Verschleiß |
| DE102021200689A1 (de) * | 2021-01-27 | 2022-07-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit reduziertem Verschleiß und Dämpfungseinrichtung |
| DE102021203738A1 (de) * | 2021-04-15 | 2022-10-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gasinjektor mit kurzer axialer Bauweise |
-
2022
- 2022-06-24 DE DE102022206350.3A patent/DE102022206350A1/de active Pending
-
2023
- 2023-04-21 CN CN202380061588.9A patent/CN119768602A/zh active Pending
- 2023-04-21 EP EP23720149.6A patent/EP4544168A1/de not_active Withdrawn
- 2023-04-21 KR KR1020257002128A patent/KR20250027263A/ko active Pending
- 2023-04-21 WO PCT/EP2023/060453 patent/WO2023247088A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN119768602A (zh) | 2025-04-04 |
| DE102022206350A1 (de) | 2024-01-04 |
| KR20250027263A (ko) | 2025-02-25 |
| WO2023247088A1 (de) | 2023-12-28 |
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