EP4301974A1 - Gasinjektor zum einblasen eines fluids - Google Patents
Gasinjektor zum einblasen eines fluidsInfo
- Publication number
- EP4301974A1 EP4301974A1 EP22700960.2A EP22700960A EP4301974A1 EP 4301974 A1 EP4301974 A1 EP 4301974A1 EP 22700960 A EP22700960 A EP 22700960A EP 4301974 A1 EP4301974 A1 EP 4301974A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas injector
- openings
- sealing
- disc
- disk
- 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- Withdrawn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
- 239000012530 fluid Substances 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 108
- 239000011324 bead Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 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
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/0272—Ball valves; Plate valves; Valves having deformable or flexible parts, e.g. membranes; Rotatable valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—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
Definitions
- the present invention relates to a gas injector for blowing in a fluid, in particular into a combustion chamber of an internal combustion engine.
- Gas injectors are known from the prior art in different configurations. Due to cost advantages and high availability of gaseous fuels, such gaseous fuels have recently become increasingly popular. However, a problem arises due to a possible, very high pressure in the combustion chambers of the internal combustion engine, which makes direct injection of gaseous fuels into the combustion chamber impossible or difficult. In particular, the tightness of such gas injectors represents a problem. Furthermore, the installation space in an internal combustion engine for gaseous fuels is also becoming continuously smaller, so that a gas injector must also be designed to be as small as possible.
- the gas injector according to the invention for injecting a fluid, in particular directly into a combustion chamber of an internal combustion engine has the advantage over the known one that, with the aid of the large number of through-openings in the form of a shower, very small strokes can be implemented and a large quantity of fluid can still flow through the valve can be transported. Furthermore, the friction and wear on the gas injector can be further reduced due to the small stroke. Furthermore, the gas injector according to the invention with the large number of through-openings in the sealing disk and valve disk can be manufactured in a small and inexpensive manner. Thus, through the large number of through-openings in the valve disc or Sealing disc high static and dynamic flow rates are made possible even with a small stroke, for example 50 to 100 pm.
- the gas injector has a sealing disc which has a multiplicity of first through-openings for guiding fluid, and has a valve disk which has a multiplicity of second through-openings for guiding fluid.
- the sealing disk is movable relative to the valve disk between a closed position, in which the sealing disk and the valve disk abut, and an open position.
- the surfaces of the sealing disk and valve disk that are in contact in the closed position are preferably lapped, which results in a high sealing effect simply because the sealing disk and valve disk are in contact.
- each opening contour of the plurality of first through openings is spaced apart from each opening contour of the plurality of second through openings, so that there is no overlapping of the plurality of first through openings with the plurality of second through openings.
- a type of shower can be created which can be opened and closed by means of a displacement between the sealing disk and the valve disk. Due to the large number of through openings and the small stroke, a piezo actuator can be used for the stroke, so that the gas injector can be controlled in a targeted and time-saving manner. Furthermore, the wear on the gas injector is reduced by the short stroke of the piezo actuator. Thus, fluids can be injected directly into the combustion chamber of internal combustion engines. Both the valve disk and the sealing disk have a large number of through-openings, each of which forms an opening contour.
- the opening contour means any outer contour or cross-sectional edge of the through-opening or bores in the sealing disk and valve disk.
- the opening contours of the valve disk and the sealing disk are arranged at a distance from one another, so that there is no overlap between the plurality of first through-openings and the plurality of second through-openings.
- the through-openings in the valve disk and the sealing disk are arranged such that when the valve disk and the The sealing disks lie directly against each other, no more fluid can flow through the two disks.
- the gas injector preferably has an actuator which is set up to translate the sealing disk relative to the valve disk, so that the gas injector can be opened and closed by means of the displacement between the sealing disk and the valve disk.
- an actuator which is set up to translate the sealing disk relative to the valve disk, so that the gas injector can be opened and closed by means of the displacement between the sealing disk and the valve disk.
- the gas injector has a housing, with the housing forming the valve disk.
- each opening contour of the plurality of first through-openings or each opening contour of the plurality of second through-openings has a bead facing the sealing disk or the valve disk, which in the closed position of the sealing disk rests against the respective opposite sealing disk or valve disk.
- the sealing disk and/or the valve disk has a coating which is designed to form a seal with each bead of the opposing sealing disk or valve disk.
- the tightness between the valve disk and the sealing disk can be further improved with the help of the coating, since the bead presses into the coating, so that the tightness can be increased due to the material deformation of the coating.
- the coating can consist, for example, of Teflon, a C-layer or plastic or the like, all of which have high temperature resistance.
- the gas injector preferably has a needle for displacing the sealing disk, the needle running through a needle bore in the valve disk and being fastened to the sealing disk, and the valve disk having a needle bead facing the sealing disk for sealing the needle bore.
- the needle is connected to the sealing washer.
- the needle is displaceably arranged in a needle bore of the valve disc.
- the valve disk has a needle bead, which is arranged in particular around the needle bore, so that tightness between the valve disk and the sealing disk, in particular in the area of the needle bore, is improved.
- Each bead and/or the needle bead is preferably produced by a laser machining process. In this way, it can be determined whether the beads or needle beads were produced by a laser machining process by creating a micrograph, in particular of the edge region of the beads.
- a first area composed of each cross section of the plurality of first through openings is substantially equal to a second area composed of each cross section of the plurality of second through openings.
- the area consisting of each cross-section of the plurality of first through-openings or each cross-section of the plurality of second through-openings can consist of between 5 and 25 mm 2 .
- the gas injector preferably has an antechamber, with a pressure equalization element being arranged inside the antechamber, which is set up to equalize a pressure in the antechamber when the gas injector is opened.
- a pressure equalization element arranged inside the antechamber, which is set up to equalize a pressure in the antechamber when the gas injector is opened.
- a corrugated bellows or the like can be placed in the vestibule be arranged so that the gas injector or the valve can be guided pressure-balanced.
- the plurality of first through openings is in a range between 10 and 300 through openings and/or wherein the plurality of second through openings is in a range between 10 and 300 through openings.
- both the valve disk and the sealing disk each have 100 passage openings, which experiments have shown to be particularly advantageous, since this results in an optimal relationship between fluid flow and stability of the valve or sealing disk.
- the diameter of the through-openings can be 0.3 mm.
- the gas injector preferably has a longitudinal axis essentially parallel to a fluid flow direction, the gas injector having a transverse axis essentially orthogonal to the longitudinal axis, the sealing disk and/or the valve disk being plate-shaped perpendicular to the longitudinal axis or being essentially conical to the transverse axis and around the longitudinal axis .
- the longitudinal axis of the gas injector can in particular be the axis of rotation along the fluid flow direction of the gas injector.
- Essentially orthogonal here means a deviation between 0.1 and 10 degrees.
- essentially conical means that the sealing disc and/or the valve disc form a conical body. This can in particular be a hollow cone.
- the sealing disk is conical to the transverse axis around the longitudinal axis, the valve disk being slat-shaped, the conical sealing disk having a base which is arranged parallel to the plate-shaped valve disk.
- FIG. 3A Such an embodiment is shown in FIG. 3A, which can lead to increased stability of the valve disk and sealing disk relative to one another.
- the sealing disc and the valve disc are conical to the transverse axis and about the longitudinal axis, with a first generatrix of the conical sealing disc and a second generatrix of the conical valve disc being arranged essentially parallel to one another, with a respective tip in the conical sealing disc and the conical Valve disc protrudes from the gas injector.
- FIG. 3B Such an embodiment is shown in FIG. 3B.
- essentially parallel to one another means that a deviation of the two generating lines from one another is in a range of 0.001 and 5 degrees.
- the plane parallelism between the sealing disk and the valve disk can be improved.
- the sealing disk and the valve disk are conical to the transverse axis and around the longitudinal axis, with a first surface line of the conical sealing disk and a second surface line of the conical valve disk being arranged essentially parallel to one another, with a respective tip of the conical sealing disk and the conical valve disk in protrudes into the gas injector.
- FIG. 3C Such an embodiment is shown in FIG. 3C.
- the advantage that the sealing disk as well as the valve disk protrude into the gas injector can be that further installation space can be saved by this arrangement.
- essentially parallel to one another means that the respective surface lines can have a deviation in parallelism of 0.001 to 5 degrees.
- the multiplicity of first through-openings in the sealing disk and/or the multiplicity of second through-openings in the valve disk are produced by laser drilling.
- a micrograph can be used to determine whether the through-openings were produced using a laser drilling process.
- a further aspect of the invention relates to a method for producing a gas injector, in particular as described above and below, having the steps:
- FIG. 1A shows a schematic sectional view of a gas injector according to a first exemplary embodiment of the invention
- FIG. 1B shows a partial sectional view of the gas injector
- Figure 2 is a schematic sectional view of the gas injector in a
- FIG. 3A to 3C a gas injector with different embodiments of the valve and sealing disk
- Figure 4 is a schematic plan view of the sealing disk
- Figure 5 is a flow chart to illustrate steps of the
- FIG. 1A the gas injector 1 comprises a sealing disk 2 with a multiplicity of first through-openings 6 for guiding fluid and a valve disk 8 which has a multiplicity of second through-openings 12 for guiding fluid.
- the valve disc 8 formed by the housing 20.
- the valve disc 8 has the plurality of second through-openings 12 , each opening contour 16 of the plurality of second through-openings 12 being arranged such that they are spaced apart from each opening contour 14 of the plurality of first through-openings 6 in the sealing disk 2 .
- the gas injector 1 has a needle 26 .
- the needle 26 is connected to the sealing disk 2 .
- the gas injector 1 can thus be opened and closed with the aid of an actuator which can move the needle 26 in a translatory manner.
- the gas injector 1 is opened and closed by means of a displacement between the sealing disk 2 and the valve disk 8. If the sealing disk 2 and the valve disk 8 are in contact with one another, the gas injector 1 is closed.
- the gas injector 1 can be opened by a minimal stroke of the actuator 18 , in particular between 50 and 100 ⁇ m, in that the sealing disk 2 is spaced apart from the valve disk 8 . Fluid can thus flow through the multiplicity of first through-openings 6 and through the multiplicity of second through-openings 12 from the gas injector 1 into a combustion chamber.
- FIG. 1B shows a partial sectional view of the gas injector 1.
- the sealing disk 2 has a coating 24.
- the valve disk 8 has a bead 22 around the opening contour 16 of the plurality of second through-openings 12 .
- the bead can also be arranged around a through-opening 6 of the sealing disk 2 and the valve disk 8 has the coating 24 .
- FIG. 2 shows the gas injector in an installation position within an internal combustion engine 46 which has a combustion chamber 48 .
- the fluid can flow through the gas injector 1 into the antechamber 36 of the gas injector, so that the fluid can flow from the antechamber 36 through the valve disk 8 and the sealing disk 2 into the combustion chamber 48 when the gas injector 1 is open.
- a pressure equalization element 38 in the antechamber 36
- the valve disk 8 has a needle bore 28 .
- the Needle 26 can be passed through needle bore 28 .
- a needle bead 27 is arranged around the needle bore 28 .
- the needle 26 is connected to the sealing disk 2 .
- FIG. 3A to 3C show the gas injector 1 with different embodiments of the sealing disk 2 and the valve disk 8.
- the gas injector 1 has a longitudinal axis 40 which is arranged parallel to the fluid flow within the gas injector 1.
- a transverse axis 42 is arranged orthogonally to the longitudinal axis 40 .
- the sealing disk 2 is conical to the transverse axis 42 and to the longitudinal axis 40 .
- the tip of the conical sealing disk 2 protrudes from the gas injector 1 .
- the sealing disk 2 has a base surface 50 which is arranged parallel to the plate-shaped valve disk 8 . The tightness between the valve disk 8 and the sealing disk 2 can thus be further improved.
- FIG. 3B shows a further embodiment of the sealing disk 2 and the valve disk 8.
- Both the sealing disk 2 and the valve disk 8 are designed conically to the transverse axis 42 and around the longitudinal axis 40.
- the conical sealing disk 2 and the conical valve disk 8 each have generatrices that are parallel to one another.
- the conical sealing disk 2 has a first surface line 52 which is arranged essentially parallel to the second surface line 54 of the conical valve disk 8 .
- the respective tips of the conical sealing disk 2 and the conical valve disk 8 protrude from the gas injector.
- Figure 3C shows another embodiment of the sealing disk 2 and valve disk 8.
- the conical shape of the sealing disk 2 and the conical shape of the valve disk 8 are designed such that a first surface line 52 of the conical sealing disk 2 and a second surface line 54 of the conical valve disk 8 are parallel are arranged to each other.
- the tips of the conical sealing disk 2 and the conical valve disk 8 protrude into the gas injector.
- FIG. 4 shows a schematic plan view of the sealing disk 2 and the valve disk 8, which lie on top of one another in a rotationally symmetrical manner.
- the cross sections 32 of the plurality of first passage openings 6 of the sealing disk 2 have a first surface 30 .
- the cross sections 34 of the second passage openings 12 form a second surface 33 .
- the areas 30, 33 each consist of the sum of the cross-sectional areas of the first and second through-openings 6, 12.
- the first area 30 is im
- FIG. 5 shows a flow chart to illustrate the steps of the method 44 for producing the gas injector 1.
- the method 44 includes the step S1
- Method 44 also includes step S2 Cutting out, in particular by means of a laser beam, the multiplicity of second through-openings 12 from valve disk 8.
- the method also includes the step Positioning S3 of the sealing washer 2 for
- Valve disc 8 so that each opening contour 14 of the plurality of first through-openings 6 is spaced from each opening contour 16 of the plurality of second through-openings 12.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021202136.0A DE102021202136A1 (de) | 2021-03-05 | 2021-03-05 | Gasinjektor zum Einblasen eines Fluids |
PCT/EP2022/051013 WO2022184339A1 (de) | 2021-03-05 | 2022-01-18 | Gasinjektor zum einblasen eines fluids |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4301974A1 true EP4301974A1 (de) | 2024-01-10 |
Family
ID=80050773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22700960.2A Withdrawn EP4301974A1 (de) | 2021-03-05 | 2022-01-18 | Gasinjektor zum einblasen eines fluids |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4301974A1 (de) |
KR (1) | KR20230154251A (de) |
CN (1) | CN117242254A (de) |
DE (1) | DE102021202136A1 (de) |
WO (1) | WO2022184339A1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015208767A1 (de) * | 2015-05-12 | 2016-11-17 | Robert Bosch Gmbh | Gasinjektor mit verbesserter Abdichtung |
DE102017202561A1 (de) * | 2017-02-17 | 2018-08-23 | Robert Bosch Gmbh | Ventil zum Steuern eines Mediums, insbesondere eines gasförmigen Mediums |
DE102017220911A1 (de) * | 2017-11-23 | 2019-05-23 | Robert Bosch Gmbh | Gasinjektor mit verbesserten Einblaseigenschaften |
-
2021
- 2021-03-05 DE DE102021202136.0A patent/DE102021202136A1/de active Pending
-
2022
- 2022-01-18 EP EP22700960.2A patent/EP4301974A1/de not_active Withdrawn
- 2022-01-18 WO PCT/EP2022/051013 patent/WO2022184339A1/de active Application Filing
- 2022-01-18 CN CN202280032891.1A patent/CN117242254A/zh active Pending
- 2022-01-18 KR KR1020237034049A patent/KR20230154251A/ko unknown
Also Published As
Publication number | Publication date |
---|---|
WO2022184339A1 (de) | 2022-09-09 |
DE102021202136A1 (de) | 2022-09-08 |
CN117242254A (zh) | 2023-12-15 |
KR20230154251A (ko) | 2023-11-07 |
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