EP2531715A1 - Steuerventilanordnung eines kraftstoffinjektors - Google Patents
Steuerventilanordnung eines kraftstoffinjektorsInfo
- Publication number
- EP2531715A1 EP2531715A1 EP11700513A EP11700513A EP2531715A1 EP 2531715 A1 EP2531715 A1 EP 2531715A1 EP 11700513 A EP11700513 A EP 11700513A EP 11700513 A EP11700513 A EP 11700513A EP 2531715 A1 EP2531715 A1 EP 2531715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide rod
- face
- control valve
- fuel injector
- projection
- 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 description 22
- 239000000463 material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing 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
- 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
-
- 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
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0043—Two-way 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
-
- 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 control valve arrangement of a fuel injector according to the preamble of claim 1.
- a fuel injector with such a control valve arrangement is known from DE 10 2006 050 045 AI.
- the fuel injector shown in this document has to control its injection nozzle, a nozzle needle which is connected to a plunger, which works in a displacement chamber Verdränger whatsoever.
- the control chamber is connected via an input-side throttle line with a high-pressure fuel source usually a so-called common rail, and can communicate on the output side via a control valve arrangement with a low pressure side of the fuel injector ren.
- control valve assembly has a sleeve-shaped closing body, which is aligned coaxially with an output bore of the control chamber and slidably disposed on a guide axis equiaxial to the output bore.
- the sleeve-shaped closing body In the closed position, the sleeve-shaped closing body cooperates with a concentric to the output bore annular seat, closing body and seat are suitably designed so that the closing body contacts the seat on a ring line in its closed position, the diameter of the inner diameter of the sleeve-shaped closing body and the outer diameter of the guide rod equivalent.
- the particular advantage of this control valve arrangement is that the high pressure occurring in the control chamber in the closing phase of the control valve arrangement exerts only radial forces on the sleeve-shaped closing body, but no forces in the axial direction. Accordingly, the closing body with actuators low power and operate largely free of inertia.
- the guide rod is acted upon on its the output hole of the control chamber opposite end face in the closing phase of the closing body of the high pressure in the control chamber and must therefore be axially supported or anchored to a stationary part of the injector body. It is basically advantageous if there is no firm connection between the stationary part and the facing end of the guide rod, but the guide rod is supported only on impact on the stationary part. In this way it is prevented that inevitable manufacturing tolerances can lead to difficulties in mounting the fuel injector.
- the guide rod can easily assume a position optimal for the annular coil during assembly of the fuel injector, without being connected to it by a fixed connection to be prevented from the guide rod axially supporting stationary part of the injector body.
- the "loose" support of the guide rod on the stationary part also enables a limited wobble mobility of the guide rod, which is advantageous because it allows the closing body to assume an optimal closed position on the associated seat.
- the invention is based on the general idea on which the guide rod axially supporting stationary part of the injector body or on the facing end side Provide the guide rod plastically deformable material, so that a provided on the other part projection can sink into the deformable material when the guide rod is acted upon on its the output hole of the control chamber opposite end by high pressure Since the control valve assembly of a fuel injector after its assembly anyway If the tightness must be checked and fluidic high pressure is applied, the test phase of the fuel injector can be used during the manufacture thereof for lowering the projection into the plastically deformable material Therefore, the construction according to the invention requires no additional manufacturing effort.
- de guide rod has a plastically deformable end face and cooperates with a projection on a stationary part of the injector body.
- the single FIGURE shows a fragmentary axial section of a fuel injector with control valve arrangement according to the invention.
- the detail shown fuel injector has a multi-part injector body 1 with a valve body 2.
- a control chamber 3 in which a plunger 4 operates Verdränger relatively, which is connected to a nozzle needle, not shown for controlling injectors, not shown.
- the control chamber 3 communicates constantly via a throttle line 5 shown only schematically, which can enforce deviating from the graphic representation of the valve body 2, with a high-pressure source 100, usually a common rail.
- a throttled outlet bore 6 for the control chamber 3 is arranged within the valve body 2.
- This output bore 6 is controlled by a sleeve-shaped closing body 7, which cooperates with a concentric to the output bore 6, annular seat 8 on the upper end face of the valve body 2 in the drawing.
- the outlet bore 6 is connected to a low-pressure space 9 provided in the injector body 1, which in turn communicates with a low-pressure region of an injection system, for example a pressureless tank 10.
- a guide rod 11 is arranged, on which the closing body 7 is slidably disposed.
- the annular gap between the outer circumference of the guide rod 11 and the inner circumference of the sleeve-shaped closing body 7 is formed as a sealing gap.
- an armature 12 is arranged, which cooperates with an annular electromagnet arrangement 13.
- the closing body 7 is tensioned against its seat 8.
- the armature 12 and the closing body 7 are lifted against the force of the helical compression spring 14 from the illustrated closed position of the closing body 7 and placed in an upper end position in which the armature 12 on the annular pole pieces 13 'and 13 "of Electromagnet assembly 13.
- the helical compression spring 14 returns the closing body 7 to the illustrated closed position.
- the lower end of the guide rod 11 is acted upon by the hydraulic pressure within the closing body 7, so that the guide rod 11 is pushed with its upper end in the drawing against a bottom part 15 of the injector body 1.
- the contact point between the guide rod 11 and the bottom part 15 is defined by the radial positions of several assembled components. Accordingly, the exact position of the contact point can be optimally determined only after installation. An optimal, positive action for fixing the upper end of the guide rod 11 on the bottom part 15 can thus be done only after installation of the fuel injector and not in the item production of the bottom part 15. According to the invention, it is now provided to fix the point of contact between the guide rod 11 and the bottom part 15 at a pressure test which is anyway necessary in the context of production of the fuel injector.
- the throttling line 5 is subjected to high-pressure in the order of magnitude of 2000 bar (in the case of an electrically electroless electromagnet arrangement 13). This has the consequence that the control chamber 3 and the first shut off by the closing body 7 relative to the low pressure chamber 9 outlet bore 6 are charged to a correspondingly high pressure.
- This high pressure acts on the lower end face of the guide rod 11, so that it is pressed against the bottom part 15 with a correspondingly large force.
- the pressure force is on the order of 500 N.
- the upper end face of the guide rod 11 is formed spherical and the bottom part 15 at least in the vicinity of the point of contact with the guide rod 11 consists of a plastically deformable material, the guide rod 11 in the bottom part 15 a Shape the hinged bowl-shaped bed.
- the spherical end face of the guide rod 11 with the facing end face of the bottom part 15 initially only a punctiform contact zone, so that the force acting on the lower end of the guide rod 11 fluid forces are removed to an extremely small area of the bottom part 15 and the aforementioned plastic deformation occurs.
- guide rod 11 and bottom part 15 can be readily selected in a suitable manner, as a rule, it is sufficient if the guide rod 11 made of hardened steel and the bottom part 15 in the contact point of non-hardened material.
- the guide rod 11 receives an optimal alignment or positive fixing on the bottom part 15 for this closing position. pers 7 so the closing body 7 is always guided by the guide rod 11 in the optimal closed position on the seat 8.
- the positive engagement of the guide rod 11 on the bottom part 15 ensures that the guide rod 11 can not leave the optimal contact point on the bottom part 15 even under operating conditions with low fluid pressures in the control chamber 3 and within the closing body 7 even under the influence of larger disturbing forces.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010001486 DE102010001486A1 (de) | 2010-02-02 | 2010-02-02 | Steuerventilanordnung eines Kraftstoffinjektors |
PCT/EP2011/050014 WO2011095367A1 (de) | 2010-02-02 | 2011-01-03 | Steuerventilanordnung eines kraftstoffinjektors |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2531715A1 true EP2531715A1 (de) | 2012-12-12 |
EP2531715B1 EP2531715B1 (de) | 2014-11-19 |
Family
ID=43660214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11700513.2A Active EP2531715B1 (de) | 2010-02-02 | 2011-01-03 | Steuerventilanordnung eines kraftstoffinjektors |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2531715B1 (de) |
CN (1) | CN102741542B (de) |
DE (1) | DE102010001486A1 (de) |
RU (1) | RU2554696C2 (de) |
WO (1) | WO2011095367A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012224203A1 (de) | 2012-12-21 | 2014-06-26 | Robert Bosch Gmbh | Magnetbaugruppe für einen Kraftstoffinjektor, Verfahren zum Herstellen einer Magnetbaugruppe sowie Kraftstoffinjektor |
DE102013221554A1 (de) * | 2013-10-23 | 2015-04-23 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102015202726A1 (de) | 2015-02-16 | 2016-08-18 | Robert Bosch Gmbh | Steuerventilanordnung |
DE102016209022A1 (de) | 2016-05-24 | 2017-11-30 | Robert Bosch Gmbh | Steuerventil für ein Kraftstoffeinspritzventil |
DE102016222871A1 (de) | 2016-11-21 | 2018-05-24 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102016223287A1 (de) | 2016-11-24 | 2018-05-24 | Robert Bosch Gmbh | Steuerventil für einen Kraftstoffinjektor, Kraftstoffinjektor |
DE102018201039A1 (de) | 2018-01-24 | 2019-07-25 | Robert Bosch Gmbh | Kraftstoffinjektor |
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 |
DE102006050045A1 (de) | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Injektor zur Einspritzung von Kraftstoff in Brennräume in Brennkraftmaschinen |
DE102007025961A1 (de) * | 2007-06-04 | 2008-12-11 | Robert Bosch Gmbh | Injektor |
DE102008003348A1 (de) * | 2008-01-07 | 2009-07-09 | Robert Bosch Gmbh | Kraftstoffinjektor |
-
2010
- 2010-02-02 DE DE201010001486 patent/DE102010001486A1/de not_active Withdrawn
-
2011
- 2011-01-03 CN CN201180008095.6A patent/CN102741542B/zh active Active
- 2011-01-03 RU RU2012137146/06A patent/RU2554696C2/ru active
- 2011-01-03 WO PCT/EP2011/050014 patent/WO2011095367A1/de active Application Filing
- 2011-01-03 EP EP11700513.2A patent/EP2531715B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011095367A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2554696C2 (ru) | 2015-06-27 |
WO2011095367A1 (de) | 2011-08-11 |
DE102010001486A1 (de) | 2011-08-04 |
CN102741542A (zh) | 2012-10-17 |
EP2531715B1 (de) | 2014-11-19 |
RU2012137146A (ru) | 2014-03-10 |
CN102741542B (zh) | 2015-03-25 |
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