EP2499350A1 - Verfahren zum herstellen eines kraftstoffeinspritzventils und kraftstoffeinspritzventil - Google Patents
Verfahren zum herstellen eines kraftstoffeinspritzventils und kraftstoffeinspritzventilInfo
- Publication number
- EP2499350A1 EP2499350A1 EP10762648A EP10762648A EP2499350A1 EP 2499350 A1 EP2499350 A1 EP 2499350A1 EP 10762648 A EP10762648 A EP 10762648A EP 10762648 A EP10762648 A EP 10762648A EP 2499350 A1 EP2499350 A1 EP 2499350A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control chamber
- valve needle
- valve
- fuel
- volume
- 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
- 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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
-
- 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
- F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
- Y10T29/49425—Valve or choke making with assembly, disassembly or composite article making including metallurgical bonding
Definitions
- the invention relates to a method for producing a fuel injection valve according to the preamble of claim 1.
- Such a method for producing a fuel injection valve (hereinafter also sometimes referred to as "injector”) is already well known and is used in particular in fuel injection valves in so-called common rail injection systems
- the pressure valves are piezo and solenoid valves in use to control the servo loop, and a fast low pressure stage is often used to quickly close the valve needle, creating a permanent, closing force on the valve needle Leakage occurring between the high and low pressure sides Leakage inevitably leads to a higher pumping capacity required in the common rail injection system and thus to loss of efficiency of the system, which is especially the case at higher pressures prescribed table.
- the latest injectors for highest injection pressures are designed low leakage, by dispensing with the low pressure stage. Due to the absence of the low-pressure stage, however, only low closing forces are available for the valve needle. As a result, the response time between the control of the valve needle and the start of injection relatively low. The response time is mainly dependent on the stiffness of the valve needle. Precisely because it is small in the case of an injector without a low-pressure stage, even a slight change in the needle stiffness leads to a large shift in the start of injection and the injected fuel quantity. The stiffness of the valve needle is dependent on the diameter and the length of the valve needle.
- the invention has the object, a method for producing a fuel injection valve according to the preamble of claim 1 such that the response time at fuel valves of different length or different length of their valve needles is at least substantially constant.
- This object is achieved in a method for producing a fuel injection valve having the features of claim 1.
- the invention is based on the idea of compensating for the different mechanical rigidity due to different lengths of the valve needles by varying the "hydraulic rigidity" of the control space connected to the valve needle In other words, this means that a relatively short and therefore stiff valve needle is thereby compensated for by being connected to a control chamber, which has a relatively large storage volume having fuel and vice versa.
- Advantageous developments of the method according to the invention for producing a fuel injection valve are specified in the subclaims. All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention.
- the geometry of the control chamber in the area in which the Valve needle is guided as a cylindrical bore is always formed with the same diameter and always the same depth and that the adjustment of the volume of the control chamber via a shortening or extension of the guided in the control chamber portion of the valve needle.
- valve needle consists of at least one standardized first section arranged in the control chamber which is connected on the side facing away from the control chamber with a second cylindrical portion and that the diameter of the second portion of the valve needle is varied, such that to shorten the delay time of the diameter of the valve needle increases and to extend the delay time of the diameter of Valve needle is reduced.
- connection between at least the second section of the valve needle and the standardized first section and optionally between the second section of the valve needle and the third section is preferably carried out by laser welding. As a result, high-strength compounds can be produced relatively economically.
- Fuel valves produced in accordance with the inventive method can be produced particularly economically with respect to their overall length if the injector housing of the fuel injection valve has a standardized upper part with the closing element, an actuating mechanism for the closing element and optionally the valve piece and a standardized lower part with a nozzle body and that between the Upper part and the lower part a total length of the injector housing defining central part is arranged.
- Fig. 1 and 2 according to the invention first fuel injection valves, in which the
- Injector has a maximum or a minimum length, respectively in longitudinal section and
- Injector have a maximum or a minimum overall length, also in longitudinal section.
- a first fuel injection valve 10 is shown, as it finds particular use in so-called common rail injection systems.
- the fuel injection valve 10 is connected via a supply line 1 with a fuel storage, a so-called rail 2, in connection.
- the rail 2 is stored under high pressure, for example, a pressure of about 2000 bar, standing fuel.
- the rail 2 is connected to a high-pressure fuel pump 3, which sucks and compresses fuel from a fuel reservoir, in particular a fuel tank 4.
- Fuel not required by the fuel injection valve 10 is returned to the fuel tank 4 via a return line 5 under low pressure.
- a fuel injection system 7 described so far has a separate fuel injection valve 10 for each cylinder of an internal combustion engine, all of which are connected to the rail 2.
- the fuel injection valve! 0 has a total of 11 designated injector housing.
- the elongated injector housing 11 consists of three modules, a standardized upper part 12, a dependent on the length of the fuel injector 10, in particular annular, possibly formed with different diameters middle part 13 and a likewise standardized lower part 14.
- a sealing ring 15 is inserted in a sealing groove, wherein the pressure-resistant connection between the central part 13 and the upper part 12, for example, by a circumferential laser welding or by a circumferential beading.
- a screw connection 8 is formed in order to connect the middle part 13 with the lower part 14 in a pressure-resistant manner.
- a pressure-balanced solenoid valve 20 is used or arranged, which has a magnetic core 21 and arranged in the magnetic core 21 magnetic coil 22.
- the solenoid valve 20 furthermore has a magnet armature 23 which acts as a closing element and is guided in an axially movable manner in a pin-shaped guide member 24.
- the foundedsgüed 24 is disposed in a through hole 25 of the magnetic core 21 and has a step 26, between which and the facing side of the armature 23, a compression spring 28 is supported.
- the compression spring 28 is in this case arranged in a spring chamber 29, which as well as the region of the upper part 12, in which the
- Magnetic core 21 is located, at least indirectly connected to the return line 5 and thus with low pressure.
- the armature 23 is pressed in the de-energized state of the solenoid 22 against a seat 30 of a valve member 32.
- the valve member 32 is screwed into an upper portion of the central part 13 and in this case sits on a step 33 of the central part 13.
- a through hole 34 is arranged with a flow restrictor 35.
- the outflow throttle 35 is connected to a control chamber 37, which is formed as a blind hole 38 on the magnet armature 23 opposite side of the valve member 32.
- a first guide portion 39 of a valve needle 40 into it.
- the substantially cylindrically shaped valve needle 40 has at its the
- Valve piece 32 opposite end to a second guide portion 41, to which a valve tip 42 connects.
- a compression spring 43 which is supported between a collar 44 of the valve needle 40 and the facing end face of the valve piece 32, the valve tip 42 is pressed against a seat 46 of a nozzle body 47.
- the seat 46 defines a nozzle space 48, in FIG the at least one serving as a fuel outlet opening 49 through hole opens.
- the nozzle body 47 is in this case inserted into the lower part 14 of the injector housing 11.
- the valve needle 40 Due to its length U and its material and thus its modulus of elasticity and its cross-sectional area A, the valve needle 40 has a certain rigidity. In the de-energized state of the solenoid valve 20, the valve needle 40 is pressed against the seat 46, wherein an elastic deformation of the valve needle 40 due to the material properties described above and the geometry of the valve needle 40 sets. When energizing the solenoid coil 20 and the associated pressure reduction in the control chamber 37, the lifting of the valve needle 40 from the seat 46 takes place only when the pressure prevailing on the upper end surface 53 of the valve needle 40 pressure or the corresponding axial force is reduced to the valve needle 40 returns to its original length.
- the pressure reduction in the control chamber 37 ie the period between the lifting of the armature 23 from the seat 30 to the reduction of the axial force on the end face 53, a certain period of time claimed, which depends on the size of the volume of the control chamber 37 .
- the sum of the delays caused by the pressure reduction in the first place Control chamber 37 and the other with respect to the elastic deformation of the valve needle 40 referred to as delay time or drive time t.
- FIG. 2 shows a fuel injection valve 10a, which differs from the fuel injection valve 10 shown in FIG. 1 in that it has an overall smaller overall length.
- the smaller overall length is achieved by reducing or shortening the middle part 13, while the lower part 14 and the upper part 12 are each formed as standardized components, which are present both in the fuel injection valve 100 and the fuel injection valve 10a in an identical manner.
- the fuel injection valve 10a differs from the fuel injection valve 10 only in the length of the middle part 13 and in the length of the valve needle 40a. Since the length L 2 of the valve needle 40a, as well as the length of the central portion 13 with respect to the fuel injection valve 10 is lower, the fuel injection valve 10a with respect to the valve needle 40a has a lower response time, (provided that the valve needle 40 and the valve needle 40a from the same Material consist and the same Querterrorismsflä- surface A have) the length L 2 of the valve needle 40 a with respect to the length L of
- Valve needle 40 is lower. This would thus also lead overall to a shortened drive time t of the fuel injection valve 10a.
- the part of the activation time t which is influenced by the volume of the control chamber 37, in the case of the fuel injection valve 10a with respect to the fuel injection valve 10 is enlarged. This is done by increasing the volume of the control chamber 37 such that the projecting into the control chamber 37 guide portion 39a of the valve needle 40a is reduced in its length.
- a third fuel injection valve 60 and a fourth fuel injection valve 60a are illustrated.
- the fuel injectors 60, 60a differ from the fuel injectors 10, 10a through the use of a differently constructed valve needle 62, 62a.
- the valve needles 62 and 62a are each formed in three parts.
- Each of the valve needles 62, 62a consists of a standardized, protruding into the control chamber 37 upper part 63 and a standardized lower part 64, which carries the second guide portion 41 and the valve tip 42.
- the upper part 63 and the lower part 64 are interconnected by means of a cylindrically shaped middle part 65, 65a. This takes place as a connection technique between the middle part 65, 65a and the upper part
- the middle part 65 has a larger diameter than the middle part 65 a with the diameter D 2 .
- the middle part 65 has a larger cross-sectional area than the middle part 65a with the cross-sectional area A 2 .
- the driving time t of the fuel injection valves 60, 60a mainly by a variation of the diameter D and the cross-sectional area A, respectively of the central part 65, 65a influenced.
- the different diameters D of the middle parts 65, 65a are present only in stages for reducing the variety of types, ie that only a limited number of diameters D is provided or in the production for assembly of
- Fuel injection valves 60, 60a are present. About the variation or selection of the middle parts 65, 65a while a coarse adjustment of the drive times t is effected. It is provided that, should a certain activation time t be realized by means of two different diameters D, the smaller diameter D is always used. This has the consequence that (compared to the larger diameter D), the volume of the control chamber 37 is smaller, to compensate for the lower rigidity of the equipped with the relatively smaller diameter D middle part 65.
- the fine tuning with respect to the activation time t takes place at the selected diameter D by a corresponding shortening or reduction of the length of the middle part 65, 65 a in such a way, that the region of the upper part 63, which is located in the valve piece 32, projects somewhat less into the control chamber 37.
- the ratio of the increase in the valve needle lift ⁇ due to the increase in the volume of the control chamber 37 for shortening the needle stroke due to the shortening of the valve needle AL can be calculated according to:
- E (65; 65a) is the modulus of elasticity of section 65; 65a,
- the fuel injection valves 10, 10a and 60, 60a described so far can be modified or modified in a variety of ways.
- the magnet assembly or the solenoid valve 20 may be constructed differently or replaced by a piezo.
- the design of the fuel injection valves 10, 10a, 60, 60a can take place so that the solenoid valve 20 can already be closed again before the injection begins or the through-bore 34 is released. In this way, variations between successive injections and Jacobruckjankeiten can be reduced.
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)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009046582A DE102009046582A1 (de) | 2009-11-10 | 2009-11-10 | Verfahren zum Herstellen eines Kraftstoffeinspritzventils und Kraftstoffeinspritzventil |
PCT/EP2010/064647 WO2011057863A1 (de) | 2009-11-10 | 2010-10-01 | Verfahren zum herstellen eines kraftstoffeinspritzventils und kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2499350A1 true EP2499350A1 (de) | 2012-09-19 |
EP2499350B1 EP2499350B1 (de) | 2014-08-20 |
Family
ID=43260297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10762648.3A Not-in-force EP2499350B1 (de) | 2009-11-10 | 2010-10-01 | Verfahren zum herstellen eines kraftstoffeinspritzventils |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120205470A1 (de) |
EP (1) | EP2499350B1 (de) |
JP (1) | JP2013510268A (de) |
CN (1) | CN102597485A (de) |
DE (1) | DE102009046582A1 (de) |
WO (1) | WO2011057863A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011077618A1 (de) * | 2011-06-16 | 2012-12-20 | Robert Bosch Gmbh | Injektor, insbesondere Kraftstoffinjektor für eine Brennkraftmaschine |
DE102012220025A1 (de) * | 2012-06-29 | 2014-01-02 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE102014226407A1 (de) * | 2014-12-18 | 2016-06-23 | Robert Bosch Gmbh | Einspritzdüse für Kraftstoffe |
WO2016116749A1 (en) * | 2015-01-23 | 2016-07-28 | Sentec Ltd | Solenoid-based fuel injector |
JP6384366B2 (ja) * | 2015-03-09 | 2018-09-05 | 株式会社デンソー | 燃料噴射装置 |
JP6708366B2 (ja) * | 2015-03-09 | 2020-06-10 | 株式会社デンソー | 燃料噴射装置及び燃料噴射装置の製造方法 |
JP6256440B2 (ja) * | 2015-06-26 | 2018-01-10 | 株式会社デンソー | インジェクタ |
WO2016208130A1 (ja) * | 2015-06-26 | 2016-12-29 | 株式会社デンソー | インジェクタ |
EP3153700A1 (de) * | 2015-10-08 | 2017-04-12 | Continental Automotive GmbH | Ventilgruppe für ein einspritzventil, einspritzventil und verfahren zur montage eines einspritzventils |
CN106351775B (zh) * | 2016-11-24 | 2019-11-12 | 北油电控燃油喷射系统(天津)有限公司 | 一种控制腔中置式高压电控喷油器 |
US11174827B1 (en) | 2020-09-18 | 2021-11-16 | Caterpillar Inc. | Fuel injector with internal radial seal with thin wall counterbore |
US11248575B1 (en) | 2020-09-18 | 2022-02-15 | Caterpillar Inc. | Fuel injector with internal leak passage to injector drain |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3941269B2 (ja) * | 1997-12-11 | 2007-07-04 | 株式会社デンソー | 金属部材のレーザ溶接構造および方法,並びに燃料噴射弁 |
JPH11280606A (ja) * | 1998-03-31 | 1999-10-15 | Denso Corp | 燃料噴射ノズル |
DE60014813T2 (de) * | 1999-08-31 | 2006-03-09 | Denso Corp., Kariya | Kraftstoffeinspritzvorrichtung |
JP3879909B2 (ja) * | 2001-03-29 | 2007-02-14 | 株式会社デンソー | 燃料噴射装置 |
US7077381B2 (en) * | 2001-07-31 | 2006-07-18 | Caterpillar Inc. | Desensitizing armature air gap to component distortion in a fuel injector |
DE10145620B4 (de) * | 2001-09-15 | 2006-03-02 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten |
JP2003176763A (ja) * | 2001-12-11 | 2003-06-27 | Denso Corp | 燃料噴射装置 |
DE10247571A1 (de) * | 2002-10-11 | 2004-04-22 | Robert Bosch Gmbh | Injektor zur Einspritzung von Kraftstoff |
DE102004017303A1 (de) * | 2004-04-08 | 2005-10-27 | Robert Bosch Gmbh | Einspritzdüse |
CN100593081C (zh) * | 2005-02-18 | 2010-03-03 | 罗伯特·博世有限公司 | 喷嘴 |
JP4325585B2 (ja) * | 2005-04-28 | 2009-09-02 | 株式会社デンソー | 燃料噴射弁およびその噴射量調整方法 |
DE102005059437A1 (de) * | 2005-12-13 | 2007-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor |
-
2009
- 2009-11-10 DE DE102009046582A patent/DE102009046582A1/de not_active Withdrawn
-
2010
- 2010-10-01 WO PCT/EP2010/064647 patent/WO2011057863A1/de active Application Filing
- 2010-10-01 JP JP2012538259A patent/JP2013510268A/ja not_active Ceased
- 2010-10-01 EP EP10762648.3A patent/EP2499350B1/de not_active Not-in-force
- 2010-10-01 CN CN2010800508659A patent/CN102597485A/zh active Pending
- 2010-10-01 US US13/503,686 patent/US20120205470A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2011057863A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102597485A (zh) | 2012-07-18 |
JP2013510268A (ja) | 2013-03-21 |
WO2011057863A1 (de) | 2011-05-19 |
DE102009046582A1 (de) | 2011-05-12 |
EP2499350B1 (de) | 2014-08-20 |
US20120205470A1 (en) | 2012-08-16 |
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