EP1143136B1 - Kraftstoffeinspritzventil für Brennkraftmaschinen - Google Patents

Kraftstoffeinspritzventil für Brennkraftmaschinen Download PDF

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Publication number
EP1143136B1
EP1143136B1 EP01105727A EP01105727A EP1143136B1 EP 1143136 B1 EP1143136 B1 EP 1143136B1 EP 01105727 A EP01105727 A EP 01105727A EP 01105727 A EP01105727 A EP 01105727A EP 1143136 B1 EP1143136 B1 EP 1143136B1
Authority
EP
European Patent Office
Prior art keywords
bore
valve body
valve
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.)
Expired - Lifetime
Application number
EP01105727A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1143136A3 (de
EP1143136A2 (de
Inventor
Gerhard Girlinger
Manfred Hackl
Stefan Reisinger
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 EP1143136A2 publication Critical patent/EP1143136A2/de
Publication of EP1143136A3 publication Critical patent/EP1143136A3/de
Application granted granted Critical
Publication of EP1143136B1 publication Critical patent/EP1143136B1/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
    • 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
    • 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
    • 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 for internal combustion engines according to the preamble of claim 1.
  • Such a fuel injection valve is from the literature known, see the document Diesel Engine Technology 2000, Expert Verlag 1999, p. 222 or DE-A1-19650865.
  • This fuel injector is part of a storage fuel injection system.
  • the fuel injector has a valve body and an axially displaceably guided injection valve member, through which at least one injection opening is controlled.
  • the injection valve member has a pressure chamber limiting pressure shoulder, with the pressure chamber below Pressure fuel from one High-pressure fuel source is supplied through which Injection valve member against a closing force for opening the at least one injection port from a valve seat can be lifted off.
  • the fuel injector has one electrical control valve through which the movement of the Injector member is influenced by the Control valve in one with the high-pressure fuel source connected control pressure chamber controlled pressure is that the injection valve member at least indirectly in acted upon its closing direction, whereby by the Control valve of the control pressure chamber with a relief chamber is connectable.
  • the control pressure chamber is in one sleeve-shaped section of one in the valve body insert used by a section of Injector member or one acting on it Intermediate link limited. Between the sleeve-shaped Section of the insert and the valve body is a Annulus formed.
  • the insert has a flange with it in the direction of the longitudinal axis of the valve body this comes to the annulus to the system.
  • the Control pressure chamber in the sleeve-shaped section of the insert is with at least one opening in the insert part Annulus connected.
  • the Pressure chamber In the valve body there is at least one essentially in its longitudinal extent, the Pressure chamber with a connection to the high-pressure fuel source inlet hole connecting fuel injector intended.
  • the annulus is over one in the valve body provided connection hole with the inlet hole connected.
  • the connecting hole runs approximately at right angles or inclined at an acute angle to the inlet bore and opens on the outer surface of the annulus.
  • the Connecting hole cuts the inlet hole in one Area that lies at the level of the annulus.
  • the fuel injector according to the invention with the Features according to claim 1 has the advantage that the mechanical stresses in the valve body on the Intersection of the connecting hole and the inlet hole are reduced, thereby increasing the fuel pressure and / or less expensive materials with less Strength can still be used sufficient durability of the valve body is ensured.
  • FIG. 1 shows a fuel injection valve in a longitudinal section and Figure 2 one in Figure 1 with II designated section of the fuel injector in enlarged view.
  • FIGs 1 and 2 is a fuel injector for Internal combustion engines, preferably self-igniting Internal combustion engines, shown, the one in particular Is part of a storage fuel injection system.
  • the storage fuel injection system has one High pressure pump through which fuel is stored in an accumulator is promoted in the form of a rail, from which lines to arranged the cylinders of the internal combustion engine Remove fuel injectors. The store forms thereby a high-pressure fuel source with which the Fuel injector is connected.
  • the fuel injector approximately has one cylindrical valve body 10, which is preferably made of Steel. Against the valve body 10 is at one end a valve housing part 12 by means of a clamping nut 14 clamped, the valve housing part 12 and the Clamping nut 14 preferably also consist of steel.
  • in the Valve body 10 is at least approximately coaxial with Bore 16 extending longitudinal axis 11 of the valve body formed and in the valve housing part 12 is at least one Bore 18 running approximately coaxially to bore 16 trained whose diameter is smaller than that of Bore 16 in the valve body 10.
  • a piston-shaped Injection valve member 20 arranged axially.
  • the Bore 18 in the valve housing part 12 has a radial Extension on, through which a pressure chamber 22 is formed.
  • the injection valve member 20 is stepped in diameter trained and goes into a in the area of the pressure chamber 22 smaller diameter, which in the pressure chamber 22 a Pressure shoulder 24 is formed on the injection valve member 20.
  • the valve housing part 12 has the combustion chamber of the End cylinder facing the engine at least one, preferably a plurality of injection openings 26 on.
  • the injection valve member 20 has the End area facing the combustion chamber, for example, approximately conical sealing surface 28, which with a Valve housing part 12 formed valve seat 30 interacts.
  • valve housing part 12 is between the arranged from the pressure chamber 22 to the combustion chamber Section of the bore 18 and the injector member 20 Annular space 32 formed, which is connected to the pressure space 22 is, which in turn is explained in more detail below connected to the memory as a high-pressure fuel source is.
  • the pressure prevailing in the pressure chamber 22 increases to the injection valve member 20 via its pressure shoulder 24 a force acting in the opening direction 21 on the Injection valve member 20 generates.
  • the injector member 20 is in its end area facing away from the combustion chamber with the larger diameter in the starting from the pressure chamber 22, section of the bore 18 facing away from the combustion chamber Valve housing part 12 guided tightly.
  • a spring plate 34 is arranged, the can be integrally formed with the valve member 20 or can be connected to this as a separate part.
  • a biased compression spring 35 arranged on the one hand on the spring plate 34 and on the other hand by a transition of the bore 16 in formed a section with a smaller diameter Ring shoulder 36 supports. The compression spring 35 Injection valve member 20 in its closing direction acted upon and with its sealing surface 28 against the Valve seat 30 pressed.
  • Valve body 10 In the bore 16 of the valve body 10 is a push rod 38 slidably guided with its the combustion chamber facing end passes through the compression spring 35 and rests with its front end on the spring plate 34.
  • the hole 16 of the valve body 10 increases in diameter the end of the valve body 10 facing away from the combustion chamber in several stages.
  • Valve body 10 At the end facing away from the combustion chamber Valve body 10 is an electrically controlled one in these Valve 40 used, which is a solenoid valve or a Piezo valve can be.
  • Valve body 10 From the end facing away from the combustion chamber is in the Valve body 10 is preferably made of steel Insert part 42 used, which is a sleeve-shaped Section 43, which in a bore section 161 of the valve body 10 is arranged.
  • the sleeve-shaped Section 43 can be pressed into the bore section 161 his.
  • the insert part 42 also has a Diameter opposite the sleeve-shaped section 43 larger flange 44, which in a corresponding in Diameter larger bore section 163 is arranged.
  • the flange 44 is with radial play in the bore section 163 arranged.
  • the Diameter is slightly larger than the diameter of the Bore section 161, but is smaller than that Diameter of bore section 163.
  • the sleeve-shaped section 43 of the insert part 42 has a Bore 48, which is at least approximately coaxial to the bore 16 of the valve body 10 and in which the End region of the push rod 38 facing away from the combustion chamber is slidably arranged.
  • a control pressure chamber 47 Through the push rod 38 in the bore 48 of the sleeve-shaped portion 43 of the Insert part 42 delimits a control pressure chamber 47.
  • the sleeve-shaped Section 43 of the insert part 42 has at least one Opening 51 through which the control pressure chamber 47 with the Annulus 49 is connected. From the control pressure chamber 47 in sleeve-shaped section 43 of the insert part 42 leads one bore 52 through the Flange 44, whose diameter to that of section 43 opposite side on the flange 44 is further reduced and whose mouth on flange 44 is widened, for example with an approximately conical bevel 53.
  • bore section 163 is on the combustion chamber opposite side of the flange 44 of the insert part 42 holding element 55, preferably made of steel used, in particular screwed in, the Bore section 163 on its flange 44 facing away End region has an internal thread and the holding element 55 has an external thread.
  • the holding element 55 engages on Flange 44 and presses it against the annular shoulder 46 the valve body 10.
  • the holding element 55 has a bore 56, which at least approximately coaxial to the bores 48, 52 of the insert part 42 is arranged and through which an anchor bolt 57 a Magnet armature of the solenoid valve 40 passes through.
  • the Magnetic armature also has an anchor plate 58, which in Diameter is larger than the anchor bolt 57 and on the side of the insert part 42 opposite Magnetic armature is arranged.
  • On the insert part 42 facing end of the anchor bolt 57 is a Locked in the form of a ball 59 attached to the Mouth of bore 52 and chamfer 53 on flange 44 of the insert part 42 cooperates as a valve seat.
  • the Magnetic armature is supported by a prestressed compression spring 60 the ball 59 pressed against the valve seat 53.
  • the Solenoid valve 40 also has an electromagnet 61 on, when a current flows through it a magnetic field is generated by the armature plate 58 of the magnet armature is tightened against the force of the compression spring 60, so that ball 59 lifts off valve seat 53 and opening 52 releases, whereby the control pressure chamber 47 with a Relief room is connected.
  • An inlet bore 70 is provided in the valve body 10 at least substantially in the direction of the longitudinal axis 11 of the Valve body 10 runs.
  • the inlet bore 70 of the Valve body 10 settles in one in valve housing part 12 provided inlet bore 71, which in the pressure chamber 22nd empties.
  • the inlet bore 70 of the valve body 10 is with a terminal 72 connected in which the from memory to Fuel injection valve leading line flows through Fuel is supplied under high pressure.
  • Port 72 is shown in Figure 1 offset in the drawing plane and is actually circumferential to the inlet bore 70 staggered and over a short, approximately tangential to Longitudinal axis 11 of the valve body 10 tap hole connected to the inlet bore 70.
  • From the inlet bore 70 leads a connecting bore 74 in the valve body 10, through which the control pressure chamber 47 with the High-pressure fuel source connected in the form of the memory is.
  • annular shoulder 46 of the valve body 10 On the annular shoulder 46 of the valve body 10 is as in Figure 2, an elevated ring web 76 is formed, on which the flange 44 of the insert part 42 in the direction of Longitudinal axis 11 of the valve body 10 comes to rest. Radial the ring shoulder 46 is thus within the ring web 76 recessed so that between this and the flange 44 of the insert part 42, an axial gap remains with the annular space 49 is connected.
  • the connecting bore 74 has a smaller diameter on as the inlet bore 70.
  • the inlet bore 70 extends as shown in Figure 1 from the combustion chamber away to the longitudinal axis 11 of the valve body 10 inclined so that the Inlet bore 70 the outer jacket of the valve body 10 approaches.
  • the connecting hole 74 intersects the Inlet bore 70 in the direction of the longitudinal axis 11 of the Valve body 10 viewed at the level of the bore section 161 and thus offset to the bore section 162, in which the Annulus 49 is formed.
  • the connection bore 74 runs with opposite inclination as the inlet bore 70, the means that the connection bore 74 away from the combustion chamber thus inclined to the longitudinal axis 11 of the valve body 10 runs that this is from the outer jacket of the valve body 10 removed.
  • the connecting hole 74 thus intersects Inlet bore 70 at an obtuse angle ⁇ .
  • the angle ⁇ is, for example, between 120 ° and 160 °.
  • the Connection bore 74 opens at the annular shoulder 46 of the Valve body 10 within the ring land 76.
  • Der Control pressure chamber 47 is thus through the opening 51 Annulus 49, the axial gap between the flange 44 and the annular shoulder 46 and the connecting bore 74 with the Inlet bore 70 connected and thus with the memory as High-pressure fuel source.
  • the transition from the Inlet bore 70 is in the connecting bore 74 preferably deburred and rounded, which of the Inlet bore 70 simply with a mechanical tool can be reached.
  • the control pressure chamber is thus 47 connected to the relief space, for example a Can be fuel tank, and from the Control pressure chamber 47 can fuel into the relief chamber flow away.
  • the relief space for example a Can be fuel tank
  • the small bore 52 in diameter reached a throttling, so that from the control pressure chamber 47 outflowing fuel quantity remains low.
  • the pressure in the control pressure chamber 47 drops below that of the High pressure fuel source supplied high pressure.
  • the of High pressure supplied to the high-pressure fuel source acts the pressure shoulder 24 of the injection valve member 20 and generates one on the injector member 20 in the Opening direction 21 force that is greater than that Sum of the pressure spring 35 and that in the Control pressure chamber 47 prevailing pressure on the push rod 38 acting force, so that the injection valve member 20 in Opening direction 21 is moved.
  • Through the Injection openings 26 take place here Fuel injection into the combustion chamber.
  • To close the The fuel injection valve becomes the control valve 40 again switched off, so that the control pressure chamber 47 from Relief chamber is separated and the pressure in the Control pressure chamber 47 on the from the high-pressure fuel source supplied high pressure rises and via the push rod 38 the injection valve member 20 moves in the closing direction.

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)
EP01105727A 2000-04-08 2001-03-08 Kraftstoffeinspritzventil für Brennkraftmaschinen Expired - Lifetime EP1143136B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10017657A DE10017657A1 (de) 2000-04-08 2000-04-08 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10017657 2000-04-08

Publications (3)

Publication Number Publication Date
EP1143136A2 EP1143136A2 (de) 2001-10-10
EP1143136A3 EP1143136A3 (de) 2003-09-10
EP1143136B1 true EP1143136B1 (de) 2004-11-17

Family

ID=7638147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105727A Expired - Lifetime EP1143136B1 (de) 2000-04-08 2001-03-08 Kraftstoffeinspritzventil für Brennkraftmaschinen

Country Status (4)

Country Link
US (1) US6488220B2 (ja)
EP (1) EP1143136B1 (ja)
JP (1) JP2001355544A (ja)
DE (2) DE10017657A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10144889C1 (de) * 2001-09-12 2003-04-17 Bosch Gmbh Robert Kraftstoffinjektor mit vom Ventilraum ausgehender Vordrosselbohrung
US7004094B2 (en) * 2002-06-28 2006-02-28 Carson Dale C Drag reduction system and method
JP2005226580A (ja) * 2004-02-13 2005-08-25 Denso Corp 燃料噴射装置
AT501668B1 (de) * 2004-08-24 2007-03-15 Bosch Gmbh Robert Steuerventil für eine einspritzdüse
DE102016220912A1 (de) * 2016-10-25 2018-04-26 Robert Bosch Gmbh Kraftstoffeinspritzventil

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618460A (ja) * 1984-06-25 1986-01-16 Toyota Motor Corp 燃料噴射弁
JPH0665871B2 (ja) * 1986-06-28 1994-08-24 日本電装株式会社 内燃機関用燃料噴射装置
JPH0665870B2 (ja) * 1986-04-11 1994-08-24 日本電装株式会社 内燃機関用燃料噴射弁
DE3839635A1 (de) * 1988-11-24 1990-05-31 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4142940C2 (de) * 1991-12-24 1994-01-27 Bosch Gmbh Robert Elektrisch gesteuerte Pumpedüse
DE4340874C2 (de) * 1993-12-01 1996-10-24 Bosch Gmbh Robert Kraftstoff-Einspritzdüse für Brennkraftmaschinen
US6027037A (en) * 1995-12-05 2000-02-22 Denso Corporation Accumulator fuel injection apparatus for internal combustion engine
GB9600771D0 (en) * 1996-01-13 1996-03-20 Lucas Ind Plc Fuel pump
DE19650865A1 (de) * 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
IT1296143B1 (it) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat Dispositivo di comando di un iniettore di combustibile per motori a combustione interna.
DE19802244A1 (de) * 1998-01-22 1999-07-29 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH11229996A (ja) * 1998-02-12 1999-08-24 Denso Corp 燃料噴射装置
DE19827267A1 (de) * 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
GB9820033D0 (en) * 1998-09-16 1998-11-04 Lucas Ind Plc Fuel injector
GB9820237D0 (en) * 1998-09-18 1998-11-11 Lucas Ind Plc Fuel injector
GB9823134D0 (en) * 1998-10-23 1998-12-16 Lucas Ind Plc Valve

Also Published As

Publication number Publication date
US6488220B2 (en) 2002-12-03
EP1143136A3 (de) 2003-09-10
EP1143136A2 (de) 2001-10-10
DE10017657A1 (de) 2001-10-11
DE50104514D1 (de) 2004-12-23
JP2001355544A (ja) 2001-12-26
US20010054653A1 (en) 2001-12-27

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