EP0975866B1 - Kraftstoffeinspritzventil für brennkraftmaschinen - Google Patents

Kraftstoffeinspritzventil für brennkraftmaschinen Download PDF

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Publication number
EP0975866B1
EP0975866B1 EP98965574A EP98965574A EP0975866B1 EP 0975866 B1 EP0975866 B1 EP 0975866B1 EP 98965574 A EP98965574 A EP 98965574A EP 98965574 A EP98965574 A EP 98965574A EP 0975866 B1 EP0975866 B1 EP 0975866B1
Authority
EP
European Patent Office
Prior art keywords
housing
valve
armature
fuel injection
insert
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
EP98965574A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0975866A1 (de
Inventor
Kurt Schraudner
Josef Ernst
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 EP0975866A1 publication Critical patent/EP0975866A1/de
Application granted granted Critical
Publication of EP0975866B1 publication Critical patent/EP0975866B1/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
    • 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
    • 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
    • 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
    • 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 is based on a fuel injection valve the genus of claim 1.
  • EP-B1-0 304 747 is a fuel injection valve known with an insert that is a cone-shaped part has that in a corresponding blind bore of the housing of the fuel injector is used and with it Closes a guide hole on the front, within the a plunger is guided, the other end on the Injector needle acts.
  • the control pressure room is at known configuration in an axial bore of the Insert housed and stands with a throttle one immediately above the plunger in the Guide hole lying further part of the control room Connection. There is a between the insert and the plunger this throttle-receiving insert is provided.
  • the solenoid valve in this embodiment has Solenoid valve housing with an axially protruding apron on the insert in its position in the housing of the Fuel injector is held.
  • the anchor of the Solenoid valve is guided and on the inner circumference of the apron is basically between the upper end of the Insert and the magnetic core of the armature Electromagnet.
  • This configuration requires a high level Effort, the stroke of the valve member of the solenoid valve adjust. There is a risk that if the anchor in direct contact with the associated core of the Electromagnet comes in disadvantageously Magnetic sticking can occur, affecting the functionality especially switching speed of the Solenoid valve significantly affected.
  • EP 0 548 916 A1 discloses a fuel injection valve with a housing which has an inlet for fuel from a high-pressure fuel source.
  • An injection valve needle is guided in the housing and connects to one.
  • one end of the sealing surface arranged cooperates with a valve seat in the housing and controls a connection between a pressure chamber that is permanently connected to the inlet and an injection opening.
  • the injection valve needle is indirectly exposed to the pressure in a control pressure chamber which is permanently connected to the inlet via an inlet throttle and is limited in a cylinder by a movable wall.
  • the movable wall is operatively connected to the injector needle.
  • a relief line containing a discharge throttle leads from the control pressure chamber, the outlet of which is controlled in a relief chamber by a solenoid valve.
  • the valve member of the solenoid valve is connected to an armature and guided in an insert.
  • the insert accommodates the valve seat of the solenoid valve, the relief line with discharge throttle, the control pressure chamber and also the cylinder with the movable wall.
  • the insert is clamped with a ring to the housing of the fuel injector.
  • the object of the invention is a fuel injection valve to create, the solenoid valve inexpensively manufactured is. This object is achieved by the characterizing features of claim 1 solved.
  • the anchor is designed as a flat anchor and in one Pot-shaped recess of the insert is adjustable, wherein one edge of the insert is in the closed position Anchor towers over and ends immediately in the plane that the End of stroke position of the armature defined. So it can be easier Assignment of the solenoid of the solenoid valve for the valve seat arranged in use and by simply revising the height of the edge of the Use this assignment can be set exactly.
  • an injection valve needle In the housing 1 of the fuel injector is an injection valve needle, not shown managed, e.g. also in the beginning cited publication is so disclosed.
  • This injector needle has a conical sealing surface at one end, which also have a conical valve seat in the housing 1 cooperates and while the injection valve needle is in contact closes injection bores on its valve seat and at when the injector needle is lifted it opens.
  • the injection bores can directly from the conical valve seat or from yourself to the conical valve seat then remove the blind hole.
  • modern Injection systems prefer the first solution.
  • Valve seat side surrounds the valve needle an annulus that up on the one hand, pressure space at the other end of the annular space is sufficient, of constantly with a high-pressure fuel source, not shown is connected in the form of a high-pressure accumulator.
  • the housing of the fuel injection valve has one Inlet 5 on.
  • the plunger 3 placed on the valve needle opposite end in a cylinder bore 4 tightly guided is. Over the length of the outside of the cylinder bore the plunger is at a distance from the housing stored and it is also a acting in the closing direction Compression spring provided either on the plunger or on the Injector needle attacks.
  • the plunger 3 closes in the cylinder bore 4 with their closed end a control pressure chamber 7, which over an inlet throttle 8, also called a Z throttle, with the inlet 5 is connected.
  • a control pressure chamber 7 which over an inlet throttle 8, also called a Z throttle, with the inlet 5 is connected.
  • the Cylinder bore 4 within a cylindrical insert 10 introduced, which from a part stepped on the outer circumference is made.
  • This smallest part 12 is followed by an Diameter middle part 14, which in a corresponding in Diameter further part of the housing bore 13 used is and finally over a shoulder 16 in one flange-like part 17 merges.
  • the cylinder bore 4 is in the range of in diameter smaller part 12 of the cylindrical insert housed. Axial goes from the control pressure chamber within this part 7 a relief line in the form of a bore 25, which merges into a flow restrictor 26, which in turn a conical valve seat 28 that ends at one Relief room adjacent.
  • This valve seat is the one Valve seat of a solenoid valve 29, which is an electromagnet 30 has a magnetic core 31, one in this embedded magnetic coil 32 and one with the magnetic core Solenoid housing 34.
  • Das Das Solenoid valve housing is by means of a clamping nut 35, which over a collar 36 with a shoulder 37 of the Solenoid valve housing is coupled to the housing of the injection valve screwed.
  • the clamping nut instructs Internal thread on an external thread on the connector 20 is screwed on.
  • the solenoid valve housing on the flange-like part 17 of the cylindrical Insert 10 pressed so that this firmly with his shoulder 16 comes to rest on the shoulder 18 of the housing. And is fixed in the housing of the fuel injector.
  • the solenoid valve 29 also has a flat armature 40, the inside of a recess 42 on the front side of the flange-like part 17 of the insert 10 comes to rest.
  • the recess 42 is circumferentially defined by an edge 43 limited, on the end face 44 the end face of the Solenoid valve housing acts.
  • the anchor With the anchor is one axially extending plunger 45 connected, the part of Is valve member and in a coaxial to Cylinder bore 4 lying guide bore 47 of the insert 10 is performed.
  • the plunger has a receptacle 49 for a ball 50, which cooperates as a valve member with the valve seat 28.
  • the Recording can be designed as a separate part that displaceable transversely to the direction of actuation of the plunger 45 is to misalignment that is due to tolerances in the Manufacturing can be attributed to compensate.
  • the flat anchor 40 is also loaded by a compression spring 52, the inside of the magnetic core 31 in an axial bore is housed and is supported there. This feather brings the valve member 50 in when the solenoid is not energized Closed position.
  • the magnetic core 31 has the flat armature 40 a flat end surface 53 which is in one plane with the Front side of the solenoid valve housing is or opposite this protrudes somewhat. So one can easily exact processing of this surface. With that Excitation of the electromagnet of the armature is not in direct Comes into contact with the end face of the magnetic core 31 is between the edge 54 of the solenoid valve housing 34 and the End face 44 of the edge 43 of the insert 10 a Intermediate disc 55 clamped, which is an edge region of the Flat anchor 40 overlaps.
  • the flat anchor 40 thus arrives when the electromagnet is excited only to this Intermediate disc 55 and will not retain magnetic forces exposed.
  • This washer can be non-magnetic be trained. Occurs the edge 54 of the solenoid valve housing 34 back to the end face 53, the Intermediate disk 55 are made correspondingly thicker.
  • the control pressure chamber 7 via the Z throttle 8 constantly when closed Solenoid valve brought to the high pressure, which is also in the High-pressure fuel accumulator pending. Since the front 6 Ram 3 has a larger area than one in a known Way existing on the injector needle, in Pressure area acting opening direction becomes the valve needle due to the high pressure in the control pressure chamber Closed position maintained. As soon as the solenoid valve is energized is, the control pressure chamber via the bore 25 and Throttle 26 can be opened to the relief chamber. The Relief space is created by the entirety of the ram guide and recess 42 formed space. The one with the Relief room connected Relief effet is in the Drawing not shown in detail. Closes the solenoid valve again by turning off the excitation of the electromagnet is built up in the control pressure chamber 7 via the throttle 8 quickly the original high pressure on and the Valve needle is then replaced by the resulting one Force brought into the closed position.
  • the design of the insert with the edge 43 allows also a very favorable adjustment of the geometric dimensions of the valve member to that of the flat armature 40. More advantageous
  • the ball is used to set the dimensions exactly 50 replaced by a larger diameter ball that the Flat anchor 40 brings in a position that its position when the electromagnet is excited. In this position become the flat anchor 40 and the edge 43 of the insert edited together so that a common level is created. So that the stroke of the flat anchor 40 can be exactly on the Set the desired dimension. Furthermore, the thickness of the Between the intermediate disc 55 and the residual air gap is set exactly.
  • the whole arrangement has the advantage that the use can be easily edited to the required dimensions and also in a simple manner together with the housing of the solenoid valve in the injector housing is clamped.

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)
EP98965574A 1998-01-22 1998-11-17 Kraftstoffeinspritzventil für brennkraftmaschinen Expired - Lifetime EP0975866B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19802244 1998-01-22
DE19802244A DE19802244A1 (de) 1998-01-22 1998-01-22 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1998/003387 WO1999037909A1 (de) 1998-01-22 1998-11-17 Kraftstoffeinspritzventil für brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0975866A1 EP0975866A1 (de) 2000-02-02
EP0975866B1 true EP0975866B1 (de) 2003-11-05

Family

ID=7855296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98965574A Expired - Lifetime EP0975866B1 (de) 1998-01-22 1998-11-17 Kraftstoffeinspritzventil für brennkraftmaschinen

Country Status (6)

Country Link
US (1) US6302087B1 (ja)
EP (1) EP0975866B1 (ja)
JP (1) JP4260228B2 (ja)
KR (1) KR100680523B1 (ja)
DE (2) DE19802244A1 (ja)
WO (1) WO1999037909A1 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940301A1 (de) * 1999-08-25 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE19952511B4 (de) * 1999-10-30 2004-09-30 Robert Bosch Gmbh Common-Rail-Injektor
JP3795724B2 (ja) * 2000-03-13 2006-07-12 株式会社デンソー 燃料噴射装置及びその噴射特性調整方法
DE10017657A1 (de) * 2000-04-08 2001-10-11 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10038996A1 (de) * 2000-08-10 2002-02-21 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE10054991A1 (de) * 2000-11-07 2002-05-29 Bosch Gmbh Robert Druckgesteuerter Injektor zum Einspritzen von Kraftstoff mit Doppelventil
DE10065220A1 (de) * 2000-12-27 2002-07-18 Bosch Gmbh Robert Kraftausgeglichenes Steuerventil am Steuerraum eines Kraftstoffinjektors
ITTO20001230A1 (it) * 2000-12-29 2002-06-29 Fiat Ricerche Iniettore di combustibile per un motore a combustione interna.
ITTO20010027A1 (it) * 2001-01-16 2002-07-16 Fiat Ricerche Metodo per realizzare iniettori di combustibile ed iniettore di combustibile.
US6845756B2 (en) * 2001-05-21 2005-01-25 Robert Bosch Gmbh High-pressure sealing element to four injectors
DE102005026513A1 (de) * 2005-06-09 2006-12-14 Robert Bosch Gmbh Ventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE102009001706A1 (de) * 2009-03-20 2010-09-23 Robert Bosch Gmbh Restluftspaltscheibe
DE102009003213A1 (de) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Restluftspaltscheibe
DE102010030600A1 (de) * 2010-06-28 2011-12-29 Robert Bosch Gmbh Minimierung des Ankerschließprellens durch ein Verzögerungsglied im Restluftspalt
US9133801B2 (en) 2011-11-01 2015-09-15 Cummins Inc. Fuel injector with injection control valve spring preload adjustment device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251051A (en) * 1979-04-19 1981-02-17 The Jacobs Manufacturing Company Solenoid structure having a relatively unrestrained generally flat armature member
DE3228079A1 (de) * 1982-07-28 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
IT212431Z2 (it) * 1987-08-25 1989-07-04 Weber Srl Le a comando elettromagnetico per valvola di iniezione del combustibi motori a ciclo diesel
JPH03156165A (ja) * 1989-11-09 1991-07-04 Yamaha Motor Co Ltd 高圧燃料噴射装置の給電線取出構造
IT1250900B (it) * 1991-12-24 1995-04-21 Elasis Sistema Ricerca Fiat Valvola di iniezione del combustibile a comando elettromagnetico.
CH689282A5 (de) * 1994-03-29 1999-01-29 Christian Dipl-Ing Eth Mathis Einspritzventil fuer eine insbesondere als Dieselmotor vorgesehene Brennkraftmaschine.

Also Published As

Publication number Publication date
DE19802244A1 (de) 1999-07-29
JP4260228B2 (ja) 2009-04-30
KR20000070729A (ko) 2000-11-25
US6302087B1 (en) 2001-10-16
WO1999037909A1 (de) 1999-07-29
DE59810087D1 (de) 2003-12-11
EP0975866A1 (de) 2000-02-02
JP2001516426A (ja) 2001-09-25
KR100680523B1 (ko) 2007-02-09

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