EP1195516A2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

Info

Publication number
EP1195516A2
EP1195516A2 EP01123836A EP01123836A EP1195516A2 EP 1195516 A2 EP1195516 A2 EP 1195516A2 EP 01123836 A EP01123836 A EP 01123836A EP 01123836 A EP01123836 A EP 01123836A EP 1195516 A2 EP1195516 A2 EP 1195516A2
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
fuel injection
injection valve
valve needle
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.)
Granted
Application number
EP01123836A
Other languages
German (de)
English (en)
Other versions
EP1195516B1 (fr
EP1195516A3 (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 EP1195516A2 publication Critical patent/EP1195516A2/fr
Publication of EP1195516A3 publication Critical patent/EP1195516A3/fr
Application granted granted Critical
Publication of EP1195516B1 publication Critical patent/EP1195516B1/fr
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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • 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

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • DE 196 25 059 A1 describes a fuel injection valve known which in a flow path of the fuel from one fuel feed to a spray opening several Has fuel channels, the cross section for a given Fuel pressure the hosed down per unit of time Amount of fuel determined.
  • To the fuel distribution in a sprayed fuel cloud is to be influenced at least a part of the fuel channels aligned so that directly through the fuel jets emerging from them the spray opening are sprayed.
  • a disadvantage of the from the above publication known fuel injector is in particular that the fuel channels in a plane perpendicular to Apply the direction of flow of the fuel, the openings So on a circular line around one with the valve seat support connected valve needle guide are arranged. This can the one flowing through the fuel injector Amount of fuel when lifting the valve closing body from The sealing seat cannot be dosed precisely enough. In particular is the ratio of the maximum amount of fuel sprayed to minimally hosed fuel amount relatively small.
  • the number of holes is not sufficient to to generate a sufficiently homogeneous cloud of fuel that the stoichiometric requirements for a complete Burning is enough. This is further compounded by the big one Diameter of the fuel channels reinforced.
  • the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that any characteristic by the arrangement of the fuel channels or their number generated can be, so that the metering behavior of Fuel injector in relation to the opening and Closing times are improved.
  • valve needle guide The hollow cylindrical shape of the valve needle guide is simple producible and can either be made in one piece with the Valve seat support made or attached to this.
  • valve closing body in the Valve needle guide has besides the improvement and control the metering properties a stabilizing effect on the Stroke course of the valve needle because of lateral offsets excluded are.
  • the valve closing body can after Place the closing process very precisely on the sealing seat.
  • the gaps in the rows of fuel channels ensure freely selectable injection dynamics and malleable Spray pattern created by the targeted introduction of Fuel channels at individual points in the Valve needle guidance can be influenced.
  • FIGS fuel injector 1 Before one of the exemplary embodiments of FIGS fuel injector 1 according to the invention closer should be described for a better understanding of the Invention first with reference to FIG. 1 an already known apart from the measures according to the invention Embodiments of identical construction fuel injector 1 briefly explained with regard to its essential components become.
  • the fuel injector 1 is in the form of a Fuel injection valve 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 injector 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 stands with a valve closing body 4 in Active connection with a valve seat body 5 arranged valve seat surface 6 to a sealing seat interacts.
  • the fuel injector 1 is acting it is an inward opening in the exemplary embodiment Fuel injector 1, which has a Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against the outer pole 9 of a magnetic coil 10 sealed.
  • the magnet coil 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which bears against 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 valve needle guide 14 led, which is disc-shaped.
  • a paired adjusting disc 15 is used for stroke adjustment the other side of the shim 15 is a Anchor 20.
  • This stands over a first flange 21 non-positively in connection with the valve needle 3, which by a weld seam 22 with the first flange 21 connected is.
  • One is supported on the first flange 21 Return spring 23, which in the present design of the Fuel injector 1 through a sleeve 24 Bias is brought.
  • a second flange 31, which with the valve needle 3 over a weld 33 is connected serves as the lower one Armature stop.
  • valve needle guide 14 in the armature 20 and on Valve seat body 5 run fuel channels 30a to 30c, which is the fuel which has a central Fuel supply 16 is supplied and through a filter element 25 is filtered, lead to the spray port 7.
  • the Fuel injector 1 is against by a seal 28 a fuel line, not shown sealed.
  • valve needle 3 If the coil current is switched off, the armature 20 falls sufficient degradation of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, whereby the valve needle 3 is in operative connection with the flange 21 moved against the stroke direction. The valve needle 3 will thereby moving in the same direction, causing the Valve closing body 4 is placed on the valve seat 6 and the fuel injector 1 is closed.
  • FIG. 2 shows an excerpt of a sectional illustration first embodiment of an inventive Fuel injector 1. The section shown is designated II in Fig. 1.
  • Fuel injector 1 has a Valve needle guide 31, which on an inlet side End face 32 of the valve seat body 5 is formed.
  • the Valve needle guide 31 can be connected to valve seat body 5 be formed in one piece or for example by Welding, soldering or similar processes with the Valve seat body 5 may be connected.
  • the valve needle guide 31 is hollow cylindrical.
  • valve needle 3 a spherical valve closing body 4.
  • the Valve closing body 4 forms with the on the Valve seat body 5 formed valve seat 6 a Sealing seat.
  • the valve closing body 4 is by the Valve needle guide 31 guided, the valve closing body 4 with a guide line 33 on an inner wall 38 of FIG Valve needle guide 31 is present. Between the guide line 33 and the sealing seat are several in the valve needle guide 31 Rows 34 of fuel channels 35 arranged, which are from a radially outer side 36 of the valve needle guide 31 extend to a radially inner side 39.
  • the fuel channels 35 can either be perpendicular to a central axis 37 of the fuel injection valve 1 run or at an angle ⁇ with respect to Center axis 37 vertical alignment in the outflow direction be inclined. The latter is hydrodynamically more favorable.
  • the fuel channels 35 By arranging the fuel channels 35 accordingly can be a characteristic curve which shows the dynamic flow of Fuel through the fuel injector Dependence on a stroke of the valve needle 3, can be set or modeled. By appropriate The stroke setting of the valve needle 3 then flows as much Fuel through the fuel channels 35, as in the frame the flow accuracy to be achieved is necessary.
  • Fig. 3 shows a schematic section along the line III-III in Fig. 2 by the valve needle guide 31 of the first Embodiment in the area of the fuel channels 35
  • Fuel channels 35 of the adjacent rows 34 are in the illustrated embodiment extensively to each other staggered to make the mixture cloud as homogeneous as possible to create.
  • the fuel channels 35 can also be without circumferential offset.
  • the fuel channels should 35 a very small diameter, for example smaller than 100 ⁇ m, in particular less than or equal to 70 ⁇ m, exhibit.
  • the production of such small-bore holes can be done for example by means of laser processing.
  • the fuel channels 35 Since the fuel channels 35 generate a swirl one tangential component relative to the central axis 37 of the Have fuel injector 1, the appears Cross section of the fuel channels 35 in Fig. 3 oval.
  • the Orientation of the tangential components of the Fuel channels 35 can be in each row 34 be in the same direction relative to the other rows 34.
  • the present embodiment of an inventive Fuel injector 1 thus connects the Twist preparation with a refinement of the measured Amount of fuel.
  • FIG. 4 to 7 show in the same sectional plane as FIG. 3 further embodiments of the invention Fuel injector 1 with different Arrangements of the fuel channels 35 each in connection with the by the appropriate arrangement of Fuel channels 35 generated characteristic.
  • the characteristic curves represent the relationship between the dynamic flow rate through the Fuel injector 1 during opening in Dependence on the valve needle stroke uniform arrangement of the fuel channels 35 increases Flow with the stroke of the valve needle 3 relatively uniform to go to a constant saturation value, which is the static flow through the Fuel injector 1 in the open state represents.
  • FIG. 4A has one Similar arrangement of the fuel channels 35 as that in Fig. 3rd shown on, but the fuel channels 35 are not circumferentially offset from each other, but in one lattice-like structure directly one below the other arranged.
  • the characteristics of those in FIGS. 3 and 4A The exemplary embodiments shown correspond to those in FIG. 4B schematically shown characteristic.
  • the arrangement of the fuel channels 35 is changed by z. B. the rows 34 are no longer complete Fuel channels 35 are equipped, but gaps 40 the characteristic changes. Becomes for example, as shown in Fig. 5A, in more detail in two rows 34 arranged every second for the sealing seat Skipped fuel channel 35, the characteristic, as in Fig. 5B shown, deformed S-shaped.
  • the opening process initially flows a smaller one Amount of fuel through the fuel injector 1 to the valve closing body 4 also the complete rows 34th releases and after a steeper increase than in Fig. 4B the Saturation value is reached.
  • FIG. 6A The embodiment shown in FIG. 6A is dispensed with to further fuel channels 35 so that the gaps 40 become longer, and the number of Rows 34 is reduced. Because of the now very isolated Fuel channels 35 flow at the beginning of the opening process only a very small amount of fuel, which then at Release of the other rows 34 very quickly on the Saturation increases and almost a step-like Course reached, as shown in Fig. 6B.
  • the characteristic curves shown in FIGS. 6B and 7B have the advantage that the desired amount of fuel in can be attributed to a short period of time and the Flow quickly goes into saturation, causing the opening and Closing times of the fuel injector 1 favorable can be influenced.
  • All of the exemplary embodiments have in common that a very small minimum amount of fuel q min can be achieved, as a result of which the ratio q max / q min of the maximum amount of fuel that can be injected q max to the minimum amount of fuel that can be injected q min is increased.
  • the invention is not based on the illustrated Embodiment limited and z. B. also for Fuel injectors 1 with piezoelectric and magnetostrictive actuators or any arrangement of Fuel channels 35 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)
EP20010123836 2000-10-06 2001-10-05 Soupape d'injection de combustible Expired - Lifetime EP1195516B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000149519 DE10049519B4 (de) 2000-10-06 2000-10-06 Brennstoffeinspritzventil
DE10049519 2000-10-06

Publications (3)

Publication Number Publication Date
EP1195516A2 true EP1195516A2 (fr) 2002-04-10
EP1195516A3 EP1195516A3 (fr) 2004-01-02
EP1195516B1 EP1195516B1 (fr) 2006-06-07

Family

ID=7658891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010123836 Expired - Lifetime EP1195516B1 (fr) 2000-10-06 2001-10-05 Soupape d'injection de combustible

Country Status (3)

Country Link
EP (1) EP1195516B1 (fr)
JP (1) JP2002155834A (fr)
DE (2) DE10049519B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2650266B2 (ja) * 1987-08-12 1997-09-03 キヤノン株式会社 スチル・ビデオ再生装置
JP4529617B2 (ja) * 2004-09-24 2010-08-25 アイシン・エィ・ダブリュ株式会社 バルブ装置
DE102004060531B4 (de) * 2004-12-16 2020-04-16 Robert Bosch Gmbh Verfahren zum Justieren von hydraulischen Ventilen
DE102013204152A1 (de) * 2013-03-11 2014-09-11 Robert Bosch Gmbh Ventil zum Steuern eines Fluids mit erhöhter Dichtheit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625059A1 (de) 1996-06-22 1998-01-02 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504849A1 (de) * 1995-02-15 1996-08-22 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
JP3700981B2 (ja) * 1995-08-29 2005-09-28 いすゞ自動車株式会社 蓄圧式燃料噴射装置
US6125818A (en) * 1997-03-19 2000-10-03 Hiatchi, Ltd. Fuel injector and internal combustion engine having the same
JPH10281039A (ja) * 1997-04-02 1998-10-20 Hitachi Ltd 燃料噴射装置とその制御方法
US6572028B1 (en) * 2000-01-19 2003-06-03 Visteon Global Technologies, Inc. Combined needle guide, filter, and flow director for gasoline fuel injectors
DE10049518B4 (de) * 2000-10-06 2005-11-24 Robert Bosch Gmbh Brennstoffeinspritzventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625059A1 (de) 1996-06-22 1998-01-02 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors

Also Published As

Publication number Publication date
EP1195516B1 (fr) 2006-06-07
DE10049519A1 (de) 2002-04-18
DE50110018D1 (de) 2006-07-20
JP2002155834A (ja) 2002-05-31
DE10049519B4 (de) 2006-01-12
EP1195516A3 (fr) 2004-01-02

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