EP3559438A1 - Kraftstoffinjektor und dessen verwendung - Google Patents
Kraftstoffinjektor und dessen verwendungInfo
- Publication number
- EP3559438A1 EP3559438A1 EP17798174.3A EP17798174A EP3559438A1 EP 3559438 A1 EP3559438 A1 EP 3559438A1 EP 17798174 A EP17798174 A EP 17798174A EP 3559438 A1 EP3559438 A1 EP 3559438A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- valve piece
- fuel injector
- longitudinal axis
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010792 warming 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
- F02M63/008—Hollow valve members, e.g. members internally guided
Definitions
- the invention relates to a fuel injector according to the preamble of
- Claim 1 Furthermore, the invention relates to the use of a
- a fuel! Njektor with the features of the preamble of claim 1 is known from EP 2 129 903 B1 of the Applicant.
- Fuel injector has a cross-sectionally hat-shaped armature, which serves to control the outflow of fuel from a control chamber of a valve piece. About the blocking or releasing a connected to the control chamber Abiaufbohrung in the valve piece, the movement of an injection member (nozzle needle) is controlled in a known manner, which in turn serves to open or release at least one injection port in the injector.
- the known magnet armature has a through hole into which protrudes a pin-shaped extension of the valve piece, wherein the extension of the radial bearing of the magnet armature is used.
- the magnet armature in the region of its through hole on the side facing the valve piece on a seat edge, which forms a sealing seat together with a valve member about a longitudinal axis of the valve member radially encircling, obliquely arranged sealing surface in the lowered position of the armature, thereby sealing the drain to prevent fuel from the control room.
- the area of the radial guide surface of the valve piece for the magnet armature, which is formed on the extension, with respect to the longitudinal axis has the same radial distance as the sealing edge on the magnet armature. This has the consequence that the area of the valve piece, which serves for the radial mounting of the armature, the pressure of the control chamber, and thus high or
- the (maximum) armature stroke is shorter or less precipitated compared to a state in which the for the
- Ankerhub essential components have at least nearly the same temperature. This has the consequence that - over the operating time of the
- the fuel injector according to the invention with the features of claim 1 has the advantage that it almost independent of temperature, ie in particular at the beginning of the commissioning of the fuel! Njektors, always at least almost the same anchor stroke.
- This is inventively achieved in that the sealing edge on the armature (which serves to form a sealing seat with a sealing surface on the valve piece) from the longitudinal axis of the magnet armature has a smaller distance than the leadership of the magnet armature serving guide portion on the armature.
- this means that the area of the radial guidance of the magnet armature is relatively widely spaced from the sealing area, which is under system pressure.
- the invention makes use of the invention in an advantageous embodiment in addition that the (temperature-dependent) linear expansion of the magnet armature is the lower, the more compact or shorter the magnet armature in
- the magnet armature In Direction of its longitudinal axis is formed. Therefore, it provides a preferred structural embodiment of the magnet armature, that this has a radially around the longitudinal axis rotating, disc-shaped portion is arranged on the outer periphery of the protruding toward the valve piece guide portion whose inner wall cooperates with a guide portion on the valve piece.
- Such, in cross-section in approximately cup-shaped trained magnet armature can be formed either as a two-part designed armature, or as integrally formed armature.
- Section in the form of a guide sleeve optionally be formed of non-magnetic material or metal.
- the connection between the guide sleeve and the central disc-shaped section can be effected in particular in the form of a welded joint by means of a laser weld.
- Magnetankers its production as a sintered component, since it allows a relatively inexpensive production.
- valve piece which allows the possibility of an axially particularly short magnet armature and an axially relatively long valve piece in the guide region for the armature, provides that the valve piece at least one, preferably several, arranged at regular angular intervals to each other
- Outflow has bores, which has an outlet in the region of the guide surface of the valve piece, wherein the outlet connects the Abiaufbohrung for the control chamber with raised valve member with a low pressure region.
- Magnetic armature is available, and that on the other hand on the armature no transverse or tilting forces are generated, which simplifies or optimizes the management of the magneto-tanker.
- outflow holes they are arranged opposite the longitudinal axis at an oblique angle, such that the sealing surface on the extension of the valve piece with respect to the longitudinal axis has a greater distance from the control chamber than the outlets of
- Another structurally preferred embodiment of the armature which makes it possible to position the sealing seat between the magnet armature and the valve piece more in the direction of the control chamber axially, provides that the
- Magnetic armature in a central region in the direction of the valve piece projecting, pin or sleeve-shaped first extension, on whose the valve piece facing end side, the sealing edge is formed, and that the first extension, at least when the armature is immersed in a recess of the valve piece.
- Embodiment of the magnet armature that this has in a central region in the direction of the magnetic coil or the magnetic core projecting, pin or sleeve-shaped second extension, which in a through hole of a
- Magnet core dips axially with little radial play.
- the immersion of the second extension into the through hole of the magnetic core has the advantage that leakage losses are reduced by the axially relatively long guide, which typically arise through an armature axially penetrating anchor bolt.
- the at least one outlet of the outflow opening opens in the region of the magnet armature and that the magnet armature at least one
- Circumferential direction have a greater extent than the outlet of the outflow holes. This makes it possible that the armature can rotate on the extension of the valve piece and regardless of his
- the rotational angle position on the extension for example, at least two outlets arranged on opposite sides of outflow holes via the passage openings on the armature can be relieved of pressure or via the passage openings fuel can flow into the low pressure region.
- Magnetic anchor conceivable that the outlet of the at least one outflow opening opens on the side facing away from the magnetic coil below the magnet armature. Since the radially encircling (flat) portion of the armature in the
- the magnet armature has at least one passage at least in the overlapping area with the end face of the valve piece facing the armature armature.
- the invention comprises the use of a fuel according to the invention described so far! Njectors for self-igniting internal combustion engines, whereby the fuel! Njektor is designed to work at a system pressure of more than 2000bar.
- Fig. 1 shows a portion of a fuel injector according to the invention in one
- Fig. 2 shows a valve piece with its cooperating armature in a perspective half-sectional view, wherein the armature has a shorter axial longitudinal than that of the fuel! Njektor according to the Fig. 1 used armature,
- Fig. 3 shows a detail of Fig. 2 in a partial longitudinal section
- the same elements or elements with the same function are provided in the figures with the same reference numerals.
- the fuel injector 100 shown in the figures is used for injecting fuel into the combustion chamber, not shown, of a self-igniting
- the fuel injector 100 is part of a so-called common-rail injection system, preferably a
- the fuel injector 100 has an injector 1 1, in a
- Pressure port 12 is screwed.
- the pressure port 12 is connected to a fuel supply line, not shown, and serves to supply a high-pressure chamber 13 with standing under high pressure or under system pressure fuel.
- the high pressure chamber 13 is formed in a recess 14 of the injector housing 1 1, in which a valve member 15 is inserted.
- the valve piece 15 has one of an end face of the valve piece 15th
- a nozzle needle 20 serving as an injection member 19 is arranged to be liftable along a longitudinal axis 22.
- the nozzle needle 20 is used in a known manner to release or closing at least one injection port formed in the injector 1 1 injection port through which the fuel from the
- High-pressure chamber 13 can be discharged into the combustion chamber of the internal combustion engine.
- this is in its lowered, the at least one injection port closing position.
- the bore 17 is limited together with the one end face of the nozzle needle 20 in the valve member 15 a control chamber 25, which is arranged on a bottom of the bore 17 Abiaufbohrung 26 which is arranged concentrically to the longitudinal axis 22 in a low pressure region 28 of the injector 1 and the fuel! Njektors 100 relieved of pressure.
- control chamber 25 can be filled by means of at least one inlet bore 30 from the high-pressure chamber 13.
- valve member 15 is seated with an enlarged diameter portion 31 at a stepped shoulder 32 of the recess 14 in the injector 1 1 axially and is by means of a clamping nut 34 axially against the shoulder 32nd braced.
- the valve member 15 On the side facing away from the control chamber 25 of the section 31, the valve member 15 has an approximately pin-shaped extension 35, at the side remote from the control chamber 25, the Abiaufbohrung 26 opens.
- Mouth region 37 of the Abiaufbohrung 26 a about the longitudinal axis 22 radially surrounding, conically arranged sealing surface 38 is provided (Fig. 2 and 3).
- the sealing surface 38 cooperates with a sealing edge 42, which is likewise formed radially on the longitudinal axis 22 and formed on a magnet armature 40 serving as a valve member.
- the armature 40 can be raised and lowered in the direction of the longitudinal axis 22. In the position of the magnet armature 40 shown in the figures, this has its lower, the valve piece 15 facing position in which the sealing edge 42 cooperates with the sealing surface 38 to form a sealing seat 43 to prevent leakage of fuel from the control chamber 25.
- the area of the sealing surface 38 on the valve piece 15 is formed within a recess 45 on the valve piece 15, wherein the recess 45 has a radially encircling edge 47.
- a plurality of outflow bores 48 which are preferably arranged at equal angular intervals relative to one another, are provided, which are arranged at an oblique angle a, which is for example between 25 ° and 60 °, with respect to a perpendicular to the longitudinal axis 22.
- the outflow holes 48 extend from the region of the inner wall 49 of the recess 45 and open in the region of a radially encircling guide portion 50 on the extension 35 of the valve member 15 in the region of each outlet 52.
- the magnet armature 40 has a about the longitudinal axis 22 radially encircling, approximately disc-shaped portion 54 which from a radially encircling, in Direction to the control chamber 25 projecting guide portion 56 is limited.
- the guide section 56 cooperates with its inner wall 58 with the guide region 50 on the extension 35, such that a radial guide for the magnet armature 40 is formed between the extension 35 and the guide section 56.
- Guide portion 56 of the armature 40 preferably a plurality of, arranged in the manner of slots in the circumferential direction of the guide portion 56 through openings 60, preferably in non-uniform
- Angular distances to each other about the longitudinal axis 22 are arranged to be independent of the rotational angular position of the armature 40 in relation to
- Magnet armature 40 with respect to the longitudinal axis 22 an overlap between the outlets 52 and the passages 60 is achieved.
- Magnetic armature 40 thus takes place both in an axial region above the passages 60 and in an axial region (in each case relative to the longitudinal axis 22) below the passages 60.
- the plate-shaped section of the magnet armature 40 moreover has a plurality of further passages 62 arranged at regular angular intervals about the longitudinal axis 22 in the form of slots projecting radially from the longitudinal axis 22. These slots extend to the edge of the disk-shaped portion of the magnet armature 40 and beyond something in the direction of the radially encircling guide portion 50 of the armature 40.
- the valve piece 15 facing (lower) end face 64 of Magnet armature 40 is arranged in the closed position of the armature 40 to form a small axial gap 65 to the end face 66 in the region of the edge 47 of the valve member 15.
- the magnet armature 40 moreover has, on the side facing the valve piece 15, a first extension 68 which projects axially into the recess 45 of the valve piece 15, the sealing edge 42 being formed on the first extension 68.
- the sealing edge 42 has from the longitudinal axis 22 a
- Anchor bolt 73 is in the region of a through hole 75 of a magnetic core
- the second extension 70 of the magnet armature 40 dips axially into the passage opening 75 of the magnet core 76.
- On the first extension 68 facing away from the top of the second extension 70 is supported on the second extension 70 from the anchor bolt 73 radially surrounding compression spring 78, which acts on the armature 40 by spring force and this force in the direction of its closed position.
- the magnet armature 40 cooperates with a magnetic coil 80 arranged in the region of the magnet core in a recess running radially around the longitudinal axis 22, which can be electrically contacted via connection pins 81, 82 or with a magnet coil 80
- the armature 40 is axially under the axial interposition of a residual air gap disc, not shown, on the
- Magnetic core 76 whereby the maximum armature stroke of the armature 40 is limited.
- FIG. 4 shows a magnet armature 40a modified with respect to FIGS. 2 and 3.
- the armature 40a differs from the armature 40 in that it is either shorter in axial length or length, i. an axially shorter
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016225946.6A DE102016225946A1 (de) | 2016-12-22 | 2016-12-22 | Kraftstoffinjektor und dessen Verwendung |
PCT/EP2017/078285 WO2018114111A1 (de) | 2016-12-22 | 2017-11-06 | Kraftstoffinjektor und dessen verwendung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3559438A1 true EP3559438A1 (de) | 2019-10-30 |
EP3559438B1 EP3559438B1 (de) | 2021-09-22 |
Family
ID=60331596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17798174.3A Active EP3559438B1 (de) | 2016-12-22 | 2017-11-06 | Kraftstoffinjektor und dessen verwendung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3559438B1 (de) |
DE (1) | DE102016225946A1 (de) |
WO (1) | WO2018114111A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10704444B2 (en) * | 2018-08-21 | 2020-07-07 | Tenneco Automotive Operating Company Inc. | Injector fluid filter with upper and lower lip seal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006021736A1 (de) * | 2006-05-10 | 2007-11-15 | Robert Bosch Gmbh | Kraftstoffinjektor mit druckausgeglichenem Steuerventil |
DE102007009165A1 (de) | 2007-02-26 | 2008-08-28 | Robert Bosch Gmbh | Kraftstoffinjektor mit einer zusätzlichen Ablaufdrossel oder mit einer verbesserten Anordnung derselben im Steuerventil |
DE102009002892A1 (de) * | 2009-05-07 | 2010-11-11 | Robert Bosch Gmbh | Druckausgeglichenes Steuerventil für einen Kraftstoffinjektor |
JP2013072498A (ja) * | 2011-09-28 | 2013-04-22 | Nabtesco Corp | 電磁アクチュエータ |
-
2016
- 2016-12-22 DE DE102016225946.6A patent/DE102016225946A1/de not_active Withdrawn
-
2017
- 2017-11-06 WO PCT/EP2017/078285 patent/WO2018114111A1/de unknown
- 2017-11-06 EP EP17798174.3A patent/EP3559438B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018114111A1 (de) | 2018-06-28 |
DE102016225946A1 (de) | 2018-06-28 |
EP3559438B1 (de) | 2021-09-22 |
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