EP1392963B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1392963B1
EP1392963B1 EP02737816A EP02737816A EP1392963B1 EP 1392963 B1 EP1392963 B1 EP 1392963B1 EP 02737816 A EP02737816 A EP 02737816A EP 02737816 A EP02737816 A EP 02737816A EP 1392963 B1 EP1392963 B1 EP 1392963B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve
fuel
armature
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
EP02737816A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1392963A1 (de
Inventor
Günter DANTES
Detlef Nowak
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 EP1392963A1 publication Critical patent/EP1392963A1/de
Application granted granted Critical
Publication of EP1392963B1 publication Critical patent/EP1392963B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • an electromagnetically actuated fuel injection valve in which for electromagnetic actuation, an armature cooperates with an electrically energizable magnetic coil and the stroke of the armature is transmitted via a valve needle to a valve closing body.
  • the valve closing body cooperates with a valve seat surface to form a sealing seat.
  • the return of the anchor is done with a return spring.
  • a disadvantage of the DE 196 26 576 A1 known fuel injection valve is in particular that the fuel injection quantity flowing through the fuel q dyn can not be dosed accurately enough when lifting the valve closing body from the sealing seat.
  • the ratio of maximum amount of fuel sprayed to minimally injected fuel quantity q max / q min is relatively small.
  • the characteristic curve of the fuel injection valve, which the course of the dynamic flow rate q dyn in Dependent on the stroke of the valve needle is relatively flat, so that strong fluctuations in the dynamic flow occur.
  • a fuel injector which ensures accurate control of the injection time, the injection quantity and the injection frequency.
  • a fuel pressure equalizing device is provided which compensates for the pressure acting on a valve needle element in both an open valve position and a closed valve position, it being ensured that an armature can be more accurately and predictably controlled in its movements.
  • the fuel pressure balancer includes a cavity formed in the valve needle member and pressure balance surfaces mounted on the valve needle member and on the cavity.
  • the armature can be designed as a piezoelectric armature and compress a hydraulic fluid in a hydraulic circuit.
  • the hydraulic circuit includes a hydraulic fluid chamber mounted adjacent the valve needle member, the chamber being structurally separate from the high pressure fuel supply. A pressure exerted on the hydraulic fluid in the chamber causes the valve needle element to initiate the injection.
  • an injector for an internal combustion engine which has a solenoid valve control.
  • an elongated insert body surrounded by a solenoid valve and coaxial with the nozzle needle is provided, which starts from a central high-pressure connection and contains a fuel supply line.
  • the fuel supply line leads on the one hand to a pressure chamber surrounding the nozzle needle and on the other hand on the back of the nozzle needle, wherein the nozzle needle backside is connectable to a discharge line through the solenoid valve.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that at least one fuel channel is arranged in the valve interior, that its cross section is closed with the fuel injection valve closed, so that the interior of the fuel injection valve is not in communication with the recess of the valve needle.
  • the fuel channel is released, so that an approximately step-shaped characteristic is achieved.
  • the at least one fuel channel is formed in a flange, which passes through the armature of the magnetic circuit and is in non-positive connection with the valve needle.
  • Another advantage is that the fuel channel is covered by a correspondingly formed shoulder of the inner pole of the fuel injection valve, whereby additional components are avoided.
  • tubular valve needle whose recess allows both the connector with the flange and a forwarding of the fuel.
  • a further advantage is that the at least one fuel channel is dimensioned so that it does not act as a throttle and thus no Hubdrosselung occurs.
  • Fig. 1 shows an excerpted sectional view of an embodiment of a fuel injection valve 1 according to the invention in the closed state.
  • the fuel injection valve 1 is embodied in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a tubular nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a valve closing body 4, which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is connected by means of a weld 8 with an outer pole 9 of a magnetic coil 10.
  • the magnet coil 10 is wound on a coil carrier 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the magnetic coil 10 is energized via a line, not shown, from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • the valve needle 3 is connected via a flange 14 which is inserted into the tubular valve needle 3 and connected by a weld 15 with the valve needle 3, in frictional connection with an armature 20.
  • the flange 14 passes through the armature 20 through a recess 19 of the Armature 20.
  • a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 31 to bias.
  • the at least one fuel channel 11 In the closed state of the fuel injection valve 1, the at least one fuel channel 11 through a shoulder 24 of the inner pole 13 opposite to a in the inner pole 13 of the Fuel injection valve 1 formed interior 29 of the fuel injection valve 1 completed.
  • the fuel is supplied via a central fuel supply 16 to the fuel injection valve 1 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a seal 28 against a distribution line, not shown.
  • the formed in the flange 14 at least one fuel passage 11 is covered in the closed state of the fuel injection valve 1 by the shoulder 24 of the inner pole 13 so that no fuel can flow through the fuel passage 11.
  • the further function of the fuel injection valve 1 during the opening process is explained in more detail in FIG. 1B.
  • FIG. 1B shows, in a sectional, schematic sectional view, a longitudinal section through the exemplary embodiment of a fuel injection valve 1 designed according to the invention, shown in FIG. 1A, in the open state.
  • Matching components are provided in Fig. 1A and 1B with matching reference numerals.
  • the inventively designed Brennscherinsp scribe valve 1 is shown in Fig. 1B in the open state, wherein formed in the flange 14 fuel passage 11, the interior 29 of the fuel injection valve 1 with the Recess 22 of the valve needle 3 connects, so that fuel, which is fed via the central fuel supply 16 and filtered by the filter element 25, can be passed through the axial bore 21 of the flange 14 and the recess 22 of the valve needle 3 to the sealing seat.
  • the valve needle 3 in this case has a plurality of flow openings 26, through which the fuel exits from the recess 22 of the valve needle 3.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the flange 14 from the inner pole 13, causing the standing with the flange 14 in operative connection valve needle 3 moves against the stroke direction. As a result, the valve closing body 4 is seated on the valve seat surface 6 and the fuel injection valve 1 will be closed. The armature 20 is seated on the anchor stop formed by the second flange 31.
  • FIG. 2 shows a schematic representation of the flow rate q dyn flowing through the fuel injection valve 1 as a function of the stroke of the valve needle 3 of the fuel injection valve 1.
  • a characteristic which represents the dynamic flow rate q dyn of fuel through the fuel injection valve 1 in response to a stroke of the valve needle 3 can be set or modeled.
  • appropriate stroke adjustment of the valve needle 3 then flows as much fuel through the fuel injector 1, as is necessary in the context of the flow accuracy to be achieved.
  • the dynamics of the fuel injector 1 can be improved and the manufacturing costs can be reduced, since the construction of an armature travel is eliminated and the minimization of the minimum amount of fuel flowing through the fuel injector 1 is achieved.
  • the at least one fuel channel 11 is dimensioned so that it does not act as a throttle, but allowed after its release an unthrottled fuel flow through the fuel injector 1.
  • the invention is not limited to the illustrated embodiment and z. B. also for Fuel injection valves 1 for mixture compression, self-igniting internal combustion engines applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02737816A 2001-05-16 2002-04-24 Brennstoffeinspritzventil Expired - Lifetime EP1392963B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10123850A DE10123850C2 (de) 2001-05-16 2001-05-16 Brennstoffeinspritzventil
DE10123850 2001-05-16
PCT/DE2002/001500 WO2002092995A1 (de) 2001-05-16 2002-04-24 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1392963A1 EP1392963A1 (de) 2004-03-03
EP1392963B1 true EP1392963B1 (de) 2007-10-10

Family

ID=7685016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02737816A Expired - Lifetime EP1392963B1 (de) 2001-05-16 2002-04-24 Brennstoffeinspritzventil

Country Status (9)

Country Link
US (1) US6910643B2 (cs)
EP (1) EP1392963B1 (cs)
JP (1) JP4064244B2 (cs)
KR (1) KR100826462B1 (cs)
CN (1) CN1308590C (cs)
BR (1) BR0205280B1 (cs)
CZ (1) CZ200367A3 (cs)
DE (2) DE10123850C2 (cs)
WO (1) WO2002092995A1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354528B1 (en) * 2010-01-15 2012-08-29 Continental Automotive GmbH Valve assembly and injection valve
US20130319930A1 (en) * 2012-05-30 2013-12-05 Cummins Intellectual Property, Inc. Interference fit for high pressure fuel system component
US9822748B2 (en) 2014-05-31 2017-11-21 Cummins Inc. Restrictive flow passage in common rail injectors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1100836A (en) 1977-12-21 1981-05-12 William H. Leckie Fuel injection timing and control apparatus
US4275693A (en) * 1977-12-21 1981-06-30 Leckie William H Fuel injection timing and control apparatus
DE3521040A1 (de) * 1985-06-12 1986-12-18 Vdo Adolf Schindling Ag, 6000 Frankfurt Einspritzventil
DE4404050C1 (de) * 1994-02-09 1994-12-01 Daimler Benz Ag Injektor mit Magnetventilsteuerung für eine Brennkraftmaschine
US5544816A (en) * 1994-08-18 1996-08-13 Siemens Automotive L.P. Housing for coil of solenoid-operated fuel injector
DE19546033A1 (de) * 1995-12-09 1997-06-12 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19626576A1 (de) * 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
IT239878Y1 (it) * 1996-12-23 2001-03-13 Elasis Sistema Ricerca Fiat Perfezionamenti ad una valvola di dosaggio a comando elettromagneticoper un iniettore di combustibile.
DE19654322C2 (de) * 1996-12-24 1999-12-23 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
US5921475A (en) * 1997-08-07 1999-07-13 Ford Motor Company Automotive fuel injector
US6056214A (en) * 1997-11-21 2000-05-02 Siemens Automotive Corporation Fuel injector
US6257496B1 (en) * 1999-12-23 2001-07-10 Siemens Automotive Corporation Fuel injector having an integrated seat and swirl generator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve

Also Published As

Publication number Publication date
CN1308590C (zh) 2007-04-04
WO2002092995A1 (de) 2002-11-21
DE50211051D1 (de) 2007-11-22
BR0205280A (pt) 2003-07-01
JP4064244B2 (ja) 2008-03-19
CZ200367A3 (cs) 2004-08-18
US6910643B2 (en) 2005-06-28
BR0205280B1 (pt) 2011-01-25
US20040011897A1 (en) 2004-01-22
KR100826462B1 (ko) 2008-05-02
CN1462339A (zh) 2003-12-17
DE10123850C2 (de) 2003-06-26
DE10123850A1 (de) 2002-11-28
EP1392963A1 (de) 2004-03-03
JP2005500451A (ja) 2005-01-06
KR20030013519A (ko) 2003-02-14

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