EP1290335B1 - Kraftstoffeinspritzventil - Google Patents

Kraftstoffeinspritzventil Download PDF

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Publication number
EP1290335B1
EP1290335B1 EP01933624A EP01933624A EP1290335B1 EP 1290335 B1 EP1290335 B1 EP 1290335B1 EP 01933624 A EP01933624 A EP 01933624A EP 01933624 A EP01933624 A EP 01933624A EP 1290335 B1 EP1290335 B1 EP 1290335B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve piece
piece
fuel
opening
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.)
Expired - Lifetime
Application number
EP01933624A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1290335A1 (de
Inventor
Patrick Mattes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1290335A1 publication Critical patent/EP1290335A1/de
Application granted granted Critical
Publication of EP1290335B1 publication Critical patent/EP1290335B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to a fuel injection valve with the Features of claim 1.
  • Such a fuel injector which also as Injector is referred to, for example, from DE 196 50 865 A1 known and used in fuel injection systems, which are equipped with a high-pressure fuel accumulator are.
  • Valve needle over a valve piston from in a control pressure chamber prevailing fuel pressure in the closing direction.
  • the control pressure chamber is in one in the valve housing used valve piece and arranged with a Inlet throttle provided inlet channel and one with an outlet throttle provided drain channel with a high-pressure fuel connection or a low-pressure fuel connection connected. Drain throttle and inlet throttle are both arranged in the same valve piece inserted into the valve housing.
  • valve member of a control valve which as a drive, for example, a magnetic actuator or Piezosteller has
  • the drain channel can be closed and opened and the fuel pressure in the control pressure chamber for the individual operations of the valve needle can be controlled.
  • the opening speed of the valve needle is when the valve is open Drain channel through the flow difference between Inlet throttle and outlet throttle and thus ultimately by Fixed size ratio of inlet and outlet throttle certainly.
  • a disadvantage of the known fuel injection valve is that both the inlet throttle and the Flow restrictor with great precision in the same component getting produced. Are the geometric dimensions of a the chokes are not within the required accuracy, so the entire valve piece must be manufactured again.
  • inlet throttle and outlet throttle in the same valve piece in addition, complex and the manufacturing committee accordingly high.
  • the known fuel injection valve opens a section of the inlet channel arranged in the valve body, from which a pressure hole leading to the injection opening branches into an annular space surrounding the valve piece, which Annulus is connected to the inlet throttle.
  • the disadvantage here is that for the inlet channel in the Valve body drilled in the area of the pressure hole leads to a critical drilling intersection that occurs at the high Pressing in the inlet channel to impair the function can lead.
  • EPC describes a fuel injection valve proposed for internal combustion engines, in which the Inlet throttle and the outlet throttle on separate components are trained.
  • the inlet throttle is in one Guide sleeve for the control piston introduced in one piece. A simple replacement of the inlet throttle is therefore not possible.
  • Flow rate between inlet throttle and outlet throttle simply replace the second valve piece with the inlet throttle without the first containing the control pressure chamber Valve piece must be removed.
  • the fuel injector does not have to be completely disassembled here that a simple adjustment of the fuel flow between Inlet and outlet throttle by adjusting and replacing of the second valve piece is possible.
  • the interchangeable Inlet throttle thus allows easy readjustment of the Injection valve in case of quantity deviations in the test field.
  • first valve piece trained opening extending radially to the valve member branches off from the control pressure chamber and the second valve piece in a coaxial with the opening of the first valve piece outwardly extending mounting hole of the valve housing is inserted and with an end portion in which the Inlet channel opens into the opening of the first valve piece is introduced. This ensures that second valve piece in a very easy to assemble manner the mounting hole of the valve housing can be replaced can.
  • the second valve piece which include a seal that connects between the first valve piece and the second valve piece seals.
  • the inner wall forms the opening formed in the first valve piece a preferably conical seat for one on the Outer wall of the second valve piece formed sealing edge.
  • connection piece provided anyway for the high-pressure fuel connection the injection valve can be advantageous at the same time can be used as a tensioning part, which at least indirectly the second valve piece against the first valve piece biases.
  • a spring element clamped which is the sealing edge of the second valve piece presses against a conical seat of the valve piece.
  • a drill waste can advantageously be avoided if one arranged in the valve housing, the injection opening pressure bore supplying the fuel to be injected, preferably in the area of the spring element into which the opens the second valve piece receiving bore.
  • the second valve piece in one piece with the connecting piece for the high-pressure fuel connection trained and with a seat seal Mistake.
  • a gradation surrounding the inlet channel is on provided the outer wall of the second valve piece, by which is an annular contact surface for a sealing ring is formed, which faces away from the bearing surface Side is pressed against the first valve piece.
  • the high pressure connection is made via a hole, which between the inlet throttle and that of the control pressure chamber inlet facing away from the inlet channel into the inlet channel opens out and the inlet channel with one in the valve housing arranged pressure hole, which connects the injection opening supplied with the fuel to be injected.
  • Fig. 1a and Fig. 1b is a section through an electrical controlled fuel injection valve according to the state of the Technology shown, such as from DE 196 50th 865 A1 is known.
  • a fuel injector is intended for use in a fuel injection system, which are equipped with a high-pressure fuel accumulator is continuous by a high pressure feed pump is supplied with high-pressure fuel and from there Fuel under injection pressure via individual electrically controlled Injectors supplied to the internal combustion engine can be.
  • the fuel injector shown in Figures 1a and 1b 1 has a valve housing 4 a longitudinal bore 5 in which, for example, as a push rod formed, piston-like part 6 is arranged, that at one end via a pressure piece 67 on an in acts on a nozzle body 65 arranged valve needle 60, which by the closing force of a nozzle spring 63 and the Pressure force of the part 6 at least one injection opening 7 in Nozzle body 65 closes.
  • the nozzle body is by means of a Spiral spring pin 66 and a nozzle nut 64 with connected to the valve body.
  • On the valve needle 60 is known in Way, a pressure shoulder 68 formed in a Pressure chamber 61 of the nozzle body 65 is arranged.
  • the Pressure chamber 61 is under high pressure via a pressure bore 8 standing fuel supplied. With an opening stroke movement of part 6, the valve needle 60 by the high pressure of fuel constantly attacking the pressure shoulder 68 in the pressure chamber 61 against the closing force of the spring 63 raised. By then connected to the pressure chamber 61 Injection opening 7 is used to inject the fuel in the combustion chamber of the internal combustion engine. By lowering the Part 6 becomes the valve needle 60 in the closing direction of the spring force the spring 63 in the valve seat 62 of the injection valve pressed and the injection process ends.
  • part 6 is on its end opposite the valve needle 60 in one Cylinder bore 11 out, which is introduced into a valve piece 12 which is inserted into the valve housing 4.
  • a control pressure chamber 14 which via an inlet channel 16 connected to a high-pressure fuel connection 3 is.
  • the inlet channel 16 is essentially in three parts educated.
  • One radially through the wall of the valve piece 12 leading bore, the inner walls of which are part of their length form an inlet throttle 15, with one the valve piece annular space 20 surrounding the circumference is permanently connected, which annulus in turn via one in the inlet channel inserted fuel filter 42 in constant communication with the high-pressure fuel connection 3 in the valve housing 4 screw-in connecting piece 9 stands.
  • the Annular space 20 is connected to longitudinal bore 5 via a sealing ring 39 sealed.
  • the control pressure chamber is via the inlet channel 16 14 the high prevailing in the high-pressure fuel accumulator Exposed to fuel pressure.
  • Coaxial to part 6 branches out the control pressure chamber 14 a running in the valve piece 12 Bore from that provided with a discharge throttle 18 Forms drain channel 17, which opens into a relief chamber 19, which is connected to a fuel low pressure connection 10 which, in turn, is not shown in FIG Way with a fuel return of the injection valve 1 connected is.
  • the outlet channel 17 exits the valve piece 12 takes place in the area of a countersunk cone Part 21 of the outer end face of the valve piece 12.
  • the valve piece 12 is in a flange region 22 firmly clamped to the valve housing 4 via a screw member 23.
  • a valve seat 24 is formed in the conical part 21, with which a control valve member 25 of the injection valve controlling solenoid valve 30 cooperates.
  • the control valve member 25 is in shape with a two-part anchor an anchor bolt 27 and an anchor plate 28 coupled, which armature with an electromagnet 29 of the solenoid valve 30 works together.
  • the anchor plate is under the influence of them inert mass against the preload of a return spring 35 dynamically slidably mounted on the anchor bolt and is by this return spring at rest against a stop ring 26 pressed on the anchor bolt.
  • the return spring 35 is fixed to the housing via a flange 32 of the anchor bolt leading slider 34 from that with this Flange between valve piece 12 and screw 23 in the valve body is firmly clamped.
  • the anchor bolt and with it the armature disk and that connected to the anchor bolt Control valve member 25 are constantly housed by one supporting closing spring 31 acted upon in the closing direction, so that the control valve member 25 normally in Close position is present on valve seat 24.
  • the anchor plate 28 is electromagnets by the electromagnet attracted and thereby the drain channel 17 to the relief space 19 open.
  • an annular shoulder 33 on the anchor bolt 27 Between the control valve member 25 and the Anchor plate 28 is an annular shoulder 33 on the anchor bolt 27, when the electromagnet is excited on the flange 32 stops and so the opening stroke of the control valve member 25th limited.
  • To set the opening stroke is between Flange 32 and valve piece 12 inserted a shim 38.
  • the opening and closing of the valve needle is as follows Controlled by the solenoid valve.
  • control pressure chamber 14 In the closed position of the control valve member 25 is the control pressure chamber 14 closed to the discharge side 19 so that there via the inlet duct 15 provided with the inlet throttle 16 the high pressure builds up very quickly, which also in the High-pressure fuel accumulator pending.
  • About the area of the The end face 13 generates the pressure in the control pressure chamber 14 Closing force on part 6 and the related Valve needle 60, which is larger than that on the other hand in Opening direction due to the high pressure Forces.
  • the control pressure chamber 14 by opening the solenoid valve open to the relief side 19, builds up the pressure in the small volume of the control pressure chamber 14 very quickly, since this is via the inlet throttle 15 of the High pressure side is disconnected.
  • FIGS. 2 and 3 are two embodiments for a fuel injector according to the invention shown.
  • the partial representation in FIGS. 2 and 3 is limited on the parts deviating from FIGS. 1a and 1b. Same Parts have been given the same reference numbers.
  • a second Valve piece 40 as an essentially cylindrical insert formed, which in a receiving bore 46 of the Valve housing 4 is used.
  • the outside diameter of the cylindrical second valve piece 40 is slightly smaller formed as the inner diameter of the receiving bore 46.
  • the front end facing the control pressure chamber 14 48 of the second valve piece 40 has a circumferential sealing edge 53, which is connected to the first valve piece 12 trained seat 55 cooperates, as below is still described.
  • the second valve piece has 40 has an axial bore which has a section 16a of the inlet channel 16 forms. A section narrowed in cross section the inner wall of the in the second valve piece 40 formed section 16a of the inlet channel forms the inlet throttle 15 out.
  • the inlet throttle is in a known manner introduced into the second valve piece 40, which like that first valve piece 12 made of metal, for example can be.
  • first and second valve piece but also made of different materials become.
  • the first valve piece 12 differs from that in Fig. 1a shown valve piece 12 in that in place of the section of the inlet duct having the inlet throttle 15 16 an opening 45 is provided in the first valve piece which is radial to the cylinder bore 11 laterally extends from the control pressure chamber 14.
  • the inner wall 55 The opening 45 forms one starting from the control pressure chamber 14 tapered outward widening in diameter Seat for the second valve piece 40.
  • the second Valve piece 40 is with the end portion 48 in the receiving bore 46 used such that the sealing edge 53 on the conical seat 55 and the end portion 48th of the second valve piece 40 with the outlet opening of the inlet channel 16 faces the control pressure chamber 14.
  • the connecting piece 9 has on its second valve piece 12 facing side a stepped annular surface 51, from the from a cylindrical projection 52 of the connecting piece 9 protrudes toward the second valve piece 40.
  • a Spring element 56 arranged, for example a plate spring or coil spring.
  • the connecting piece 9 is in a threaded bore the valve housing 4 screwed and pressed with the projection 52 engaging in the receiving bore 46 the spring element 56 against the second valve piece 40, which hereby with the sealing edge 53 in the conical seat 55 is pressed.
  • a slid over the protrusion 52 on the annular surface 51 is sealing ring 41 pressed and sealed at the same time against the valve housing 4 the valve housing against the connecting piece.
  • the pressure chamber 61 with fuel supplying pressure bore 8 opens in the area of the spring element 56 into the receiving bore 46.
  • the under High-pressure fuel comes from the high-pressure fuel accumulator from the fuel filter first into the Part of the inlet channel 16, which is arranged in the connecting piece 9 and from there on the one hand through the gaps of the spring element 56 in the receiving bore 46 and Pressure bore 8 and the other through section 16a of the second valve piece 40 and the inlet throttle 15 in the Control pressure chamber 14.
  • the spring element 56 it is also possible on the spring element 56 to do without, and the second valve piece 40 immediately with the screwed connector 9 against that to bias the first valve piece 12.
  • the projection 52 of the connecting piece 9 can then be used to connect the pressure bore 8 with the inlet channel a radially opening into the inlet channel 16 have side hole.
  • first valve piece surrounding the opening 45 12 and the end face 48 of the second valve piece 40 just design and the second valve piece 40 with a Sealing ring against the flat part of the outer wall of the first Press valve piece 12. In this case, this applies second valve piece 40 not in the opening 45 of the first Valve piece.
  • FIG. 3 Another embodiment is shown in FIG. 3. at In this embodiment, the second valve piece 40 made in one piece with the connecting piece 9 made of metal.
  • this embodiment results from that the cylindrical projection 52 of the connecting piece 9 from 2 is somewhat extended and has a further gradation, which has an annular bearing surface 57 for one forms another sealing ring 54, for example a Viton seal.
  • the sealing ring 54 becomes 9 when screwing in the connecting piece the threaded bore of the valve housing 4 against the outer wall of the first valve piece 12 pressed, whereby the control pressure chamber 14 is sealed.
  • transverse bore 58 in the inlet channel 16 a, which the inlet channel with the in the valve housing 4 arranged pressure hole 8 connects.
  • this transverse bore 58 is approximately coaxial with the pressure bore 8 introduced into the connecting piece 3.

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)
EP01933624A 2000-05-23 2001-04-24 Kraftstoffeinspritzventil Expired - Lifetime EP1290335B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10025497A DE10025497A1 (de) 2000-05-23 2000-05-23 Kraftstoffeinspritzventil
DE10025497 2000-05-23
PCT/DE2001/001540 WO2001090565A1 (de) 2000-05-23 2001-04-24 Kraftstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1290335A1 EP1290335A1 (de) 2003-03-12
EP1290335B1 true EP1290335B1 (de) 2004-10-27

Family

ID=7643242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01933624A Expired - Lifetime EP1290335B1 (de) 2000-05-23 2001-04-24 Kraftstoffeinspritzventil

Country Status (9)

Country Link
US (1) US20040069863A1 (pt)
EP (1) EP1290335B1 (pt)
JP (1) JP2003534492A (pt)
KR (1) KR20020019555A (pt)
CN (1) CN1380939A (pt)
BR (1) BR0106657A (pt)
CZ (1) CZ2002201A3 (pt)
DE (2) DE10025497A1 (pt)
WO (1) WO2001090565A1 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216622B3 (de) * 2002-04-15 2004-01-08 Siemens Ag Einstückig ausgebildetes Steuermodul für einen Kraftstoffinjektor
DE10257641B4 (de) * 2002-07-29 2009-08-20 Robert Bosch Gmbh Kraftstoffinjektor mit und ohne Druckverstärkung mit steuerbarer Nadelgeschwindigkeit und Verfahren zu dessen Steuerung
DE102004022428A1 (de) * 2004-05-06 2005-12-01 Siemens Ag Einspritzventil für Brennkraftmaschinen
ES2273197T3 (es) * 2004-06-30 2007-05-01 C.R.F. Societa Consortile Per Azioni Inyector de combustible con valvula de control por equilibrio de fuerzas.
JP4716142B2 (ja) * 2008-09-16 2011-07-06 株式会社デンソー 燃料噴射装置
EP2295784B1 (en) * 2009-08-26 2012-02-22 Delphi Technologies Holding S.à.r.l. Fuel injector
DE102011081176A1 (de) * 2011-08-18 2013-02-21 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
US9644589B2 (en) * 2013-11-20 2017-05-09 Stanadyne Llc Debris diverter shield for fuel injector
CN113123909A (zh) * 2021-05-24 2021-07-16 中国重汽集团重庆燃油喷射系统有限公司 用于高压共轨系统的压紧套

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1118765A2 (de) * 2000-01-19 2001-07-25 CRT Common Rail Technologies AG Brennstoffeinspritzventil für Verbrennungskraftmaschinen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391808A (en) * 1942-08-19 1945-12-25 Continental Motors Corp Fuel atomizer
JPS618461A (ja) * 1984-06-25 1986-01-16 Nippon Denso Co Ltd アキユ−ムレ−タ型燃料噴射ノズル
US4709679A (en) * 1985-03-25 1987-12-01 Stanadyne, Inc. Modular accumulator injector
DE4237469B4 (de) * 1992-11-06 2004-05-13 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen
CH689282A5 (de) * 1994-03-29 1999-01-29 Christian Dipl-Ing Eth Mathis Einspritzventil fuer eine insbesondere als Dieselmotor vorgesehene Brennkraftmaschine.
FI101738B1 (fi) * 1996-01-30 1998-08-14 Waertsilae Nsd Oy Ab Ruiskutusventtiilijärjestely
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
IT1295462B1 (it) * 1997-10-02 1999-05-12 Elasis Sistema Ricerca Fiat Iniettore di combustibile a comando elettromagnetico per motori a combustione interna.
JP3704957B2 (ja) * 1998-07-06 2005-10-12 いすゞ自動車株式会社 インジェクタ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1118765A2 (de) * 2000-01-19 2001-07-25 CRT Common Rail Technologies AG Brennstoffeinspritzventil für Verbrennungskraftmaschinen

Also Published As

Publication number Publication date
BR0106657A (pt) 2002-04-02
KR20020019555A (ko) 2002-03-12
DE50104303D1 (de) 2004-12-02
JP2003534492A (ja) 2003-11-18
CN1380939A (zh) 2002-11-20
US20040069863A1 (en) 2004-04-15
CZ2002201A3 (cs) 2003-06-18
WO2001090565A1 (de) 2001-11-29
EP1290335A1 (de) 2003-03-12
DE10025497A1 (de) 2001-11-29

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