EP2454467A1 - Ventilanordnung - Google Patents
VentilanordnungInfo
- Publication number
- EP2454467A1 EP2454467A1 EP10724357A EP10724357A EP2454467A1 EP 2454467 A1 EP2454467 A1 EP 2454467A1 EP 10724357 A EP10724357 A EP 10724357A EP 10724357 A EP10724357 A EP 10724357A EP 2454467 A1 EP2454467 A1 EP 2454467A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- closing element
- fuel injection
- closing
- pressure fuel
- 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
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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M61/042—The valves being provided with fuel passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
-
- 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
- F02M63/0028—Valves characterised by the valve actuating means hydraulic
- F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
-
- 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
-
- 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
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7761—Electrically actuated valve
Definitions
- the present invention relates to a valve arrangement for a
- High-pressure fuel injection in particular for gasoline direct injection with pressures of more than 20 MPa.
- valves for gasoline direct injection exact dosage of the injected fuel quantity must be guaranteed even with a high switching dynamics and high injection pressures.
- the actuator used for driving the valve needle in this case must apply high forces, resulting in a deterioration of the
- valve seat diameter is usually chosen as small as possible. However, this leads to a reduced hydraulic effective area and a very small remaining space for the arrangement of
- Particulate emissions in the exhaust gas are required to be used.
- Patent claim 1 in contrast, has the advantage that in this case also in High pressure applications only small forces to open the valve are needed, which can be provided by means of a low-cost electromagnetic actuator.
- the valve arrangement according to the invention moreover, even for operation with injection pressures well above 20 MPa and with high switching dynamics, a sufficiently large flow cross-section can be provided so that no internal throttling of the fuel to be injected occurs during the injection phase.
- This is inventively achieved in that the hydraulic force to be overcome by the electromagnetic actuator when opening the valve is drastically reduced by opening a pilot valve before opening a main valve.
- This pilot valve has only a small seat diameter and is therefore exposed to only a small hydraulic closing force. By opening the pilot valve, the pressure rises in a pressure equalization chamber and the main valve can be opened almost without force.
- the main valve can have a large
- the movable components of the valve d. H. the pilot valve, the main valve and a magnetic armature of the electric actuator, are combined into a separate assembly that can be easily assembled and adjusted independently of the other valve components and then installed in the valve body. This enables a parallel production of several of these modules.
- a driver region is arranged on a closing element of the pilot valve, which can be brought into contact after opening the pilot valve with a Vorventilnadel to open the main valve. Consequently, the valve assembly according to the invention can be produced more cheaply and faster due to the reduced number and simple geometry of the components.
- Spray hole of a nozzle directed spherical surface. This will be a achieved independent tolerance compensation, since the support piston can freely position within the closing element in terms of its angular position.
- a closing diameter of a closing element of the main valve is formed only slightly larger than the outer diameter of the supporting piston. Due to the accordingly very small resulting hydraulic effective area of the fuel at high pressure on the closing element thus only a small opening force for the main valve is required.
- the closing diameter is preferably greater by 0.3 to 0.7 mm, in particular by a maximum of 0.5 mm.
- the electromagnetic actuator comprises an inner pole, which in a housing of the electromagnetic actuator
- Valve assembly is arranged by means of a press fit.
- an adjusting sleeve is further arranged by means of a press fit, which is in contact with a first closing spring and by their position a closing force of
- a gap seal is provided in the valve arrangement according to the invention between the support piston and the closing element.
- the support piston has a wide chamfer on a side directed toward the injection hole. This allows a low-resistance fuel flow to the spray holes.
- the driver portion is formed as a sleeve which is connected to the closing element.
- a second closing spring which is supported on the pilot valve needle via a sleeve exerts a force on the closing element.
- the contact force is reduced in the Vorventilsitz so that the pilot valve and thus the main valve can be opened faster.
- a fast closing of the valve is effected by the first closing spring.
- Figure 1 is a simplified schematic sectional view of
- Figure 2 is a simplified schematic enlarged sectional view of the pilot valve and main valve of the invention
- Valve arrangement of Figure 1 is a perspective view of the preassembled assembly of the valve needle assembly.
- Figure 4 is a perspective view of the housing
- pre-assembled module absorbs.
- Valve arrangement 1 of a fuel injection system according to a preferred embodiment of the invention described in detail.
- the valve arrangement 1 comprises a pilot valve 3, a main valve 4, a
- electromagnetic actuator 21 as well as a housing 20.
- the pilot valve 3 comprises a pilot valve needle 5, a Vorventilsitz 9 and a pressure chamber 18. At the injection-side end of the pilot valve needle 5 is an in
- valve assembly 1 comprises a main valve 4 with the closing element
- the closing element 7 has a receiving space 7a in which the axially displaceable supporting piston 20a is arranged such that a gap seal 16 with a small gap height is formed between the closing element 7 and the supporting piston 20a.
- a pressure compensation hole 19 in the closing element 7 is provided to reduce an opening force for the main valve 4.
- the pressure compensation chamber 13 is formed between the support piston 20a and the pressure compensation bore 19.
- an inner pole 25 and a magnet armature 24 of the electromagnetic actuator 21 are arranged inside the housing 20 of the valve assembly 1.
- Magnetic lid 21 a and a magnet pot 21 b having a coil 21 c of the electromagnetic actuator 21 disposed therein are provided on the outer circumference of the housing 20. Inside the inner pole 25 is a first
- Closing spring 8 is arranged, which is in contact with an armature guide 24a of the armature 24, which is fixed to an end portion of the pilot valve 5.
- the first closing spring 8 is biased by means of a first closing spring adjusting sleeve 26, which is pressed into the inner pole 25.
- an armature spring 23 is arranged biased to the
- the support piston 20a has a central spherical surface 20b with a diameter D1 at the injection-side end, while an annular region between the
- Diameter D1 of the spherical surface 20b and an outer diameter D2 of the support piston 20a is formed as a wide chamfer 20c.
- the closing element 7 forms a seal with respect to the nozzle 1 1 at a closing diameter, which is only slightly larger than the outer diameter D 2, wherein the closing element 7 rests against the main valve seat 10 on the inner surface of the nozzle 11.
- Closing element 7 are formed in the form of a flat 7b, to ensure an unobstructed fuel flow. Moreover, one or more portions of the closing member 7 are formed in the form of a guide surface 7c to provide guidance of the closing member 7 on the inner surface of the nozzle 11 (see Fig. 2). Alternatively, the guidance of the closing element 7 can also take place via corresponding forms on the nozzle 11. As can be seen further from FIG. 2, the pilot valve ball 9a seals over the valve
- Vorventilhub-adjusting sleeve 12 At the injection-side end of the Vorventilhub-adjusting sleeve 12 also has a driver portion 15 is formed, which is attached to the Vorventilnadel 5
- a spring force F1 of 40 N and a spring force F2 of 30 N and a hydraulic force F hyd of 20 N (which corresponds to a hydraulic force at a pilot valve seat diameter of 0.8 mm and an injection pressure of 40 MPa ) the pilot valve 3 at a
- Vorventilkugel 9a facing the end of the pilot valve adjusting sleeve 12 is formed.
- the closing element 7 is raised and releases the main valve seat 10, so that the fuel can flow through the injection holes 11 a of the nozzle 1 1.
- the closing element 7 moves so far in the axial direction X-X until the
- Magnetic armature 24 reaches the upper stop on the inner pole 25.
- FIG. 3 illustrates a perspective illustration of a preassembled assembly of a valve needle arrangement 2 of the valve arrangement 1 according to the invention.
- the valve needle assembly 2 is assembled by inserting the pilot valve needle 5 with the pilot ball 9a welded thereto into the closure member 7 and the pilot valve stroke via the pilot valve lift sleeve 12, e.g. B. by
- Closing spring 6 is pushed onto the pilot valve needle 5 and by appropriately fixing the second closing spring adjusting sleeve 12a with the desired
- Preload force F2 be biased. Thereafter, the armature 24 is pushed onto the pilot valve needle 5.
- the magnet armature 24 can either be firmly connected to the pilot valve needle 5 or optionally, as shown in FIG. 3, be mounted on the pilot valve needle 5 in an axially displaceable manner.
- the armature spring 23 biases the magnet armature 24 against the armature guide 24a firmly connected to the pilot valve needle 5. This will allow the
- Magnetic anchor 24 can swing through after closing the injector in the direction of the injection side, whereby a bounce reduction is achieved.
- valve needle assembly 2 After insertion of the support piston 20a into the closing element 7, the valve needle assembly 2 is completely assembled and, as shown in FIG. 4, can be inserted as a whole into the housing 20. Finally, the inner pole 25, the first closing spring 8 and the first closing spring adjusting sleeve 26 are pressed into the housing 20.
- the illustrated valve needle assembly 2 provides with a small number of additional components, ie the closing element 7, the Vorventilhub adjustment sleeve 12, the support piston 20a, and the second closing spring 6 and the second closing spring adjusting sleeve 12a, the valve assembly 1 according to the invention with a controllable pressure equalization ready.
- the pilot valve 5 including the pilot valve ball 9a attached thereto from existing prior art valves.
- the nozzle 11 may be formed either conically or flat in the region of the main valve seat 10. In a conical valve seat 10, it is expedient to provide the closing element 7 in the seating area with a radius which is so large that the
- Main valve seat 10 which forms tangent to the resulting ball segment.
- valve arrangement 1 has in particular a low
- the movable components of the valve arrangement 1 according to the invention can be combined to form a separate module which is independent of the others
- Valve components are mounted and then inserted into the housing 20.
- the simple adjustment of the valve strokes and the biasing forces of the springs is advantageous.
- valve assembly 1 of the invention can provide a high switching dynamics even at high injection pressures.
- valve assembly 1 allows easy adaptation, especially for future applications with further increased
- Spray hole number and / or the injection hole geometry adapted and replaced according to the specific requirements.
- valve assembly 1 also allows a substantially similar assembly process as in the production of
- valve assembly according to the invention distinguishes a built-in compatibility with currently available high-pressure injection valves.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (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 |
---|---|---|---|
DE102009027727A DE102009027727A1 (de) | 2009-07-15 | 2009-07-15 | Ventilanordnung |
PCT/EP2010/057171 WO2011006707A1 (de) | 2009-07-15 | 2010-05-25 | Ventilanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2454467A1 true EP2454467A1 (de) | 2012-05-23 |
EP2454467B1 EP2454467B1 (de) | 2013-07-17 |
Family
ID=42352004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100724357 Not-in-force EP2454467B1 (de) | 2009-07-15 | 2010-05-25 | Ventilanordnung |
Country Status (6)
Country | Link |
---|---|
US (1) | US8955775B2 (de) |
EP (1) | EP2454467B1 (de) |
JP (1) | JP5355791B2 (de) |
CN (1) | CN102472210B (de) |
DE (1) | DE102009027727A1 (de) |
WO (1) | WO2011006707A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014137038A (ja) * | 2013-01-18 | 2014-07-28 | Denso Corp | 燃料噴射弁 |
DE102014205454A1 (de) * | 2014-03-24 | 2015-09-24 | Robert Bosch Gmbh | Gasinjektor mit Doppelventilnadel |
WO2016042753A1 (ja) * | 2014-09-17 | 2016-03-24 | 株式会社デンソー | 燃料噴射弁 |
US10180106B2 (en) | 2016-05-17 | 2019-01-15 | Hamilton Sundstrand Corporation | Solenoids for gas turbine engine bleed valves |
DE102017210351A1 (de) * | 2017-06-21 | 2018-12-27 | Robert Bosch Gmbh | Proportionalventil zum Steuern eines gasförmigen Mediums und Brennstoffzellenanordnung |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2710216A1 (de) | 1977-03-09 | 1978-09-14 | Bosch Gmbh Robert | Kraftstoffeinspritzduese |
WO1987006308A1 (en) | 1986-04-15 | 1987-10-22 | Voest-Alpine Automotive Gesellschaft M.B.H. | Injection valve for internal combustion engines |
JPH0280768A (ja) | 1988-09-13 | 1990-03-20 | Eidai Co Ltd | 洋室の一角に和室を施工する方法 |
JPH0280768U (de) * | 1988-12-09 | 1990-06-21 | ||
US5301874A (en) * | 1990-05-26 | 1994-04-12 | Robert Bosch Gmbh | Adjusting sleeve for an electromagnetically actuatable valve |
US5271599A (en) * | 1990-09-28 | 1993-12-21 | Kolchinsky Abel E | Modular solenoid valve |
US5899389A (en) * | 1997-06-02 | 1999-05-04 | Cummins Engine Company, Inc. | Two stage fuel injector nozzle assembly |
DE19741850A1 (de) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Eispritzventil |
ATE391232T1 (de) * | 1999-10-06 | 2008-04-15 | Delphi Tech Inc | Kraftstoffeinspritzventil |
DE19949527A1 (de) * | 1999-10-14 | 2001-04-19 | Bosch Gmbh Robert | Injektor für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen mit in den Ventilsteuerraum ragender Düsennadel |
DE10032517A1 (de) * | 2000-07-05 | 2002-01-24 | Bosch Gmbh Robert | Injektor mit Steuerteilführung |
DE10034444A1 (de) | 2000-07-15 | 2002-01-24 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US6557779B2 (en) * | 2001-03-02 | 2003-05-06 | Cummins Engine Company, Inc. | Variable spray hole fuel injector with dual actuators |
ITTO20010814A1 (it) * | 2001-08-14 | 2003-02-14 | Fiat Ricerche | Iniettore di combustibile per un motore endotermico e relativo metododi fabbricazione. |
DE10336327B4 (de) * | 2003-08-07 | 2016-03-17 | Robert Bosch Gmbh | Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren |
DE102004030447A1 (de) | 2004-06-24 | 2006-01-12 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung |
JP4168448B2 (ja) * | 2004-07-08 | 2008-10-22 | 株式会社デンソー | 燃料噴射弁 |
CN1323239C (zh) | 2005-02-07 | 2007-06-27 | 大连理工大学 | 喷油嘴 |
JP2008031853A (ja) * | 2006-07-26 | 2008-02-14 | Denso Corp | 燃料噴射弁 |
-
2009
- 2009-07-15 DE DE102009027727A patent/DE102009027727A1/de not_active Withdrawn
-
2010
- 2010-05-25 CN CN201080031386.2A patent/CN102472210B/zh not_active Expired - Fee Related
- 2010-05-25 EP EP20100724357 patent/EP2454467B1/de not_active Not-in-force
- 2010-05-25 JP JP2012519948A patent/JP5355791B2/ja not_active Expired - Fee Related
- 2010-05-25 WO PCT/EP2010/057171 patent/WO2011006707A1/de active Application Filing
- 2010-05-25 US US13/321,236 patent/US8955775B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011006707A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011006707A1 (de) | 2011-01-20 |
US8955775B2 (en) | 2015-02-17 |
US20120125451A1 (en) | 2012-05-24 |
JP5355791B2 (ja) | 2013-11-27 |
CN102472210B (zh) | 2015-04-15 |
DE102009027727A1 (de) | 2011-01-20 |
JP2012533024A (ja) | 2012-12-20 |
EP2454467B1 (de) | 2013-07-17 |
CN102472210A (zh) | 2012-05-23 |
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