EP1213475A2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1213475A2
EP1213475A2 EP01129476A EP01129476A EP1213475A2 EP 1213475 A2 EP1213475 A2 EP 1213475A2 EP 01129476 A EP01129476 A EP 01129476A EP 01129476 A EP01129476 A EP 01129476A EP 1213475 A2 EP1213475 A2 EP 1213475A2
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
injection valve
central axis
closing body
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.)
Withdrawn
Application number
EP01129476A
Other languages
German (de)
English (en)
Other versions
EP1213475A3 (fr
Inventor
Guenter 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 EP1213475A2 publication Critical patent/EP1213475A2/fr
Publication of EP1213475A3 publication Critical patent/EP1213475A3/fr
Withdrawn legal-status Critical Current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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • Fuel injectors to adjust the direction of the hosed fuel in the combustion chamber Internal combustion engine have at least one spray opening, whose central axis corresponds to the central axis of the Fuel injector a non-zero Includes angles are e.g. known from US 5,058,549.
  • the sealing seat is from a valve seat surface introduced into the nozzle body and a conical valve needle formed in this area.
  • the valve needle has an upstream of the sealing seat radial expansion, its expansion with the inner radial expansion of the nozzle body corresponds. Thereby the valve needle is guided in the axial direction.
  • In the radial expansion is introduced at least one groove that the volume of fuel upstream of the radial expansion with the volume downstream of the radial expansion connects.
  • the groove is not parallel to the central axis of the fuel injector, so that the Fuel flow with the fuel injector open with a twist. Through the oblique arranged spray opening becomes the swirled Redirected fuel flow.
  • the fuel is on one Hosed cone jacket, the central axis of the central axis corresponds to the spray opening.
  • the entire swirl-generating component which consists of a Multilayer electroplated washer is in a recess of the valve seat body introduced.
  • the recess is with the required jet angle in the valve seat body brought in.
  • the swirl-generating component is from fixed downstream side by a support element.
  • In the support element is centrally a spray opening introduced so that the swirl-forming component with the Spray opening has a common central axis.
  • the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that by connecting a Valve closing body with a valve needle in a sealing seat Flow direction is arranged. This is a redirection of the fuel flow after the spin processing required.
  • the swirl-forming element can be upstream the sealing seat. Another advantage is this results in a reduction in the dead volume, resulting in the amount of fuel escaping clearly after the end of the spray is reduced and there is an improvement in exhaust emissions and consumption comes. Due to the partially spherical Training of the valve seat body can this before its Fixation can be pivoted as desired, so that any Spray angle can be adjusted.
  • the simplified manufacturing is an additional advantage of the through the flexible connection of the valve closing body with the valve needle.
  • the tolerances at the Production of the components can be increased since the summed up component tolerances, e.g. in Angular errors result from the joint between Valve needle and valve closing body are balanced can. Lower reject rates and cheaper ones Manufacturing costs are the consequences.
  • the spray opening is particularly advantageous symmetrical formation of a swirl that despite the Arrangement of the swirl-generating component upstream of the Tight fit is possible. Because the fuel has no redirection after experiencing swirl is upon entry an even swirl flow into the spray opening available. Accordingly, it is on a cone jacket sprayed fuel evenly distributed.
  • Another advantage also results from the Symmetry of the valve seat group. By the lesser Flow loss is a larger fuel flow adjustable, causing the fuel injector in Turbomotors can be used.
  • valve closing body By a between the valve seat body and the Pressure spring arranged valve closing body must the ball-joint can only transmit forces in the printing direction. At the The fuel injector opens Valve closing body by a spring force from the The valve seat surface is lifted off. This gives the advantage a simple variant formation, especially regarding the Opening and closing behavior by adapting adjusted by the compression spring used for opening can be.
  • the fuel injector 1 is in the form of a Fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited Running internal combustion engines.
  • the Fuel injector 1 is particularly suitable for not injecting fuel directly into one Shown combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged.
  • the Valve needle 3 is with a valve closing body 4 in Active connection with one in a valve seat body 5 arranged valve seat surface 6 to a sealing seat interacts.
  • the fuel injector 1 is acting it is an electromagnetic in the exemplary embodiment actuated fuel injector 1, which via a Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against the outer pole of a magnetic coil 10 sealed.
  • the magnet coil 10 is a coil housing 11 encapsulated and wound on a bobbin 12, which abuts an inner pole 13 of the magnet coil 10.
  • the Inner pole 13 and outer pole 9 are through a gap 26 separated from each other and are based on one Connecting component 29 from.
  • the solenoid 10 is a Line 19 from via an electrical plug contact 17th supplyable electric current excited.
  • the plug contact 17 is surrounded by a plastic sheath 18, which on Inner pole 13 may be molded.
  • the valve needle 3 is in a disc-shaped design Valve needle guide 14 out. This is one Paired shim 15, which for setting the Valve needle stroke serves.
  • an anchor 20 On the upstream side of the Adjustment disk 15 is an anchor 20. This is standing non-positively via a flange 21 with the valve needle 3 in connection, which by a weld 22 with the Flange 21 is connected.
  • the flange 21 is supported a return spring 23, which in the present Design of the fuel injector 1 by one in the Inner pole 13 pressed sleeve 24 brought to bias becomes.
  • a valve seat group 4 is detailed in FIG. 2 shown. It consists of the nozzle body 2 used and welded to this valve seat body 5 and the valve closing body 4 arranged therein, which by the compression spring 32 against a partially spherical upstream joint part 33 is pressed, which with the valve needle 3 is firmly connected, e.g. by a Weld joint 42a.
  • valve seat body 5 In the valve seat body 5 is on the upstream side introduced a guide recess 35.
  • Support surface 36 To the downstream end of the guide recess 35 is one Support surface 36 arranged which is in the form of a circular disc has, whose center on the central axis of Guide recess 35 lies.
  • To the contact surface 36 connects the valve seat surface 6 downstream, downstream of which the spray opening 7 is arranged.
  • the Central axis 44 of the spray opening 7 is with the Central axes of the valve seat 6 and Guide recess 36 identical.
  • the valve seat body 5 is on its outside partially spherical. It is from the inside in the nozzle body 2 on one with the partial spherical shape of the Valve seat body 5 corresponding Seat body recess 37 placed. Due to the partial spherical shape simple alignment of the spray opening 7 is possible.
  • the example of a not shown Centering mandrel fixed position of the valve seat body 5 is by welding the valve seat body 5 with the Nozzle body 2 fixed.
  • the part-spherical outer geometry of the valve seat body 5 enables simple manufacture different variants of fuel injector 1, when using identical components.
  • the contact surface is shown in the Embodiment arranged a swirl disk 38.
  • the Swirl disk 38 for example as a stamped part can be made is a central recess introduced, the radial extent is greater than that radial expansion of the valve closing body 4.
  • one or more recesses in the swirl disk 38 introduced which is preferably tangential to the central Open the recess.
  • the recesses On the downstream side of the Swirl disk 38 are the recesses through the Support surface 36 of the valve seat body 5 covered, so that the recesses are supplemented to twist grooves that the at open fuel injector 1 by the swirl grooves flowing fuel with a swirl.
  • the upstream side of the swirl disk 38 forms this downstream spring bearing for the compression spring 32.
  • Das upstream spring bearing is supported by a radial Paragraph 39 formed on the valve closing body 4. at closed fuel injector 1 is the Compression spring 32 through the valve closing body 4 so far compressed that the valve closing body 4 on the Valve seat 6 is in sealing system.
  • the valve closing body 4 is on its downstream the valve seat surface 6 in contact preferably part-spherical. At its upstream On the side, it also has a part-spherical depression 40 on that with the part-spherical hinge part 33 of the Valve needle 3 cooperates to form a ball joint 45.
  • the center of the part-spherical recess 40 lies in Idle state of the fuel injector 1 on the Intersection of the central axis 43 of the Fuel injector 1 and the central axis 44 of the Spray opening 7.
  • the radial expansion of the valve closing body 4 between the part-spherical recess 40 and the paragraph 39 is so dimension that between the valve closing body 4 and the guide recess 35 has the smallest possible gap results.
  • the Valve closing body 4 moved slightly in the axial direction and is exact with respect to a radial movement guided. From the upstream side of the Valve closing body 4 to the paragraph 39 run in the Shell surface grooves through which the fuel on the Valve closing body 4 passes over to the sealing seat.
  • the part-spherical recess 40 of the Valve closing body 4 forms the downstream joint part.
  • the upstream joint part 33 is a partial ball formed with the spherical recess 40 of the Valve closing body 4 corresponds.
  • the spherical Joint part 33 can be, for example, a ball bearing ball, on the valve needle 3 by a welded connection 42 is attached.
  • valve seat group 34 can also be used without the swirl disk 38 be executed.
  • the valve seat group 34 can also be used without the swirl disk 38 be executed.
  • Twist formation through the grooves 40 in the Valve closing body 4.
  • the function of the downstream The spring bearing is then through the bearing surface 36 in the Valve seat body 5 taken over.
  • Compression springs 32 can be dynamic in a simple manner Adjust the behavior of fuel injector 1. in the The illustrated embodiment is the most effective for that Opening of fuel injector 1 available Spring force is the difference in the spring forces of the compression spring 32 and the return spring 23.
  • the actuation of the Fuel injector 1 can also be used, for example a piezo actuator instead of the magnetic coil 10.

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)
EP01129476A 2000-12-11 2001-12-11 Soupape d'injection de combustible Withdrawn EP1213475A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000161572 DE10061572A1 (de) 2000-12-11 2000-12-11 Brennstoffeinspritzventil
DE10061572 2000-12-11

Publications (2)

Publication Number Publication Date
EP1213475A2 true EP1213475A2 (fr) 2002-06-12
EP1213475A3 EP1213475A3 (fr) 2004-01-02

Family

ID=7666627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129476A Withdrawn EP1213475A3 (fr) 2000-12-11 2001-12-11 Soupape d'injection de combustible

Country Status (2)

Country Link
EP (1) EP1213475A3 (fr)
DE (1) DE10061572A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007073975A1 (fr) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Soupape d'injection de carburant

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058549A (en) 1988-02-26 1991-10-22 Toyota Jidosha Kabushiki Kaisha Fuel swirl generation type fuel injection valve and direct fuel injection type spark ignition internal combustion engine
US5258549A (en) 1988-03-26 1993-11-02 Bp Chemicals Limited Process for preparing carboxylic acids
DE19815789A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2940239A1 (de) * 1979-10-04 1981-04-16 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
DE3427526A1 (de) * 1984-07-26 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
US5241858A (en) * 1991-12-09 1993-09-07 Siemens Automotive L.P. Dynamic flow calibration of a fuel injector by selective diversion of magnetic flux from the working gap
DE19723953A1 (de) * 1997-06-06 1998-12-10 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058549A (en) 1988-02-26 1991-10-22 Toyota Jidosha Kabushiki Kaisha Fuel swirl generation type fuel injection valve and direct fuel injection type spark ignition internal combustion engine
US5258549A (en) 1988-03-26 1993-11-02 Bp Chemicals Limited Process for preparing carboxylic acids
DE19815789A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007073975A1 (fr) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Soupape d'injection de carburant
CN101341330B (zh) * 2005-12-22 2011-09-07 罗伯特·博世有限公司 燃料喷射阀

Also Published As

Publication number Publication date
DE10061572A1 (de) 2002-06-27
EP1213475A3 (fr) 2004-01-02

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