EP1379778B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1379778B1
EP1379778B1 EP02737742A EP02737742A EP1379778B1 EP 1379778 B1 EP1379778 B1 EP 1379778B1 EP 02737742 A EP02737742 A EP 02737742A EP 02737742 A EP02737742 A EP 02737742A EP 1379778 B1 EP1379778 B1 EP 1379778B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
fuel
valve according
spray hole
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
EP02737742A
Other languages
German (de)
English (en)
Other versions
EP1379778A1 (fr
Inventor
Guenter Dantes
Detlef Nowak
Matthias Waldau
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 EP1379778A1 publication Critical patent/EP1379778A1/fr
Application granted granted Critical
Publication of EP1379778B1 publication Critical patent/EP1379778B1/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
    • 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
    • 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
    • F02M61/1853—Orifice plates

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection system for an internal combustion engine having an injector with a fuel jet adjusting plate having first nozzle holes arranged along a first circle and second nozzle holes arranged along a second circle.
  • the second circle has a diameter larger than that of the first circle.
  • the circles are arranged coaxially with a central axis of the adjustment plate.
  • Each hole axis of the second nozzle holes forms an acute angle with a reference plane which is perpendicular to the central axis of the valve body. The angle is smaller than the one through each.
  • Hole axis of the first nozzle holes is formed with the reference plane.
  • fuel sprays injected through the first nozzle holes may be directed away from the fuel atomizations injected through the second nozzle holes.
  • the fuel atomizations injected through the first nozzle holes do not disturb the fuel atomizations that occur be injected through the second nozzle holes, which makes it possible to properly atomize the injected fuel.
  • the nebulizer consists of a domed disc, which is crossed by equilateral triangular Abspritzlöchern, which increase in the direction of the downstream end. It is believed that the triangular Abspritzlöcher a more uniform drop shape of the fuel mist is formed.
  • the nebulizer itself is mounted between the valve body and the valve seat body with a seal between the underside of the nebulizer and the valve seat body. Between the underside of the atomizer, the valve seat body and the gap between the atomizer and the valve seat body, a dead volume is formed. Even during the dead time of the valve fuel can enter from the dead volume in the combustion chamber.
  • a disadvantage of the method for mixture formation or fuel injection valve known from the above publication is, in particular, the lack of homogeneity of the mixture cloud and the problem of transporting the ignitable mixture into the region of the spark gap of the spark plug.
  • the lack of homogeneity of the mixture cloud and the problem of transporting the ignitable mixture into the region of the spark gap of the spark plug.
  • swirl valves or swirling mechanisms must be used in these cases, on the one hand to fill the combustion chamber with the fuel / air mixture and on the other hand to lead the ignitable mixture to the spark plug.
  • the spark plug is usually sprayed directly. This leads to heavy sooting of the spark plug and frequent thermal shock, whereby the spark plug has a shorter life.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that a dome-shaped curved spray orifice plate is mounted at the downstream end of the valve seat body of the fuel injection valve, that the coking can be optimized by reducing the dead volume.
  • the spray hole plate can be produced in a simple manner and into a recess of the fuel injection valve downstream of the sealing seat be inserted.
  • the attachment can be done for example by means of a weld.
  • the thermal shock load and the fouling of the spark plug are reduced by an optimal hole design of Abspritzlöcher.
  • Sharp-edged spray holes and the conical shape of the same prevent a detachment of the fuel flow in the spray hole, whereby the coking decreases sharply.
  • the conical Abspritzlöcher have the advantage that the pressure drop of the fuel at the outlet opening is minimal and thus maximum pressure energy for spray formation is available.
  • the injection jets in the combustion chamber can advantageously be considered the mounting position of the intake and exhaust valves and the spark plug in the cylinder head and still the combustion chamber geometry can be optimally used.
  • Fig. 1 shows in an extractive sectional view an example of a fuel injection valve 1.
  • 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 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 a bore 7 for the forwarding of the fuel downstream of the sealing seat.
  • the valve closing body 4 of the inventively designed fuel injection valve 1 has a nearly spherical shape. As a result, an offset-free, gimbal valve needle guide is achieved, which ensures an exact functioning of the fuel injection valve 1.
  • valve seat body 5 of the fuel injection valve 1 is formed almost pot-shaped and carries by its shape for valve needle guide both valve seat body 5 is inserted into a discharge-side recess 34 of the nozzle body 2 and connected by a weld 35 with the nozzle body 2. Between the nozzle body 2 and the valve seat body 5, a dome-shaped curved spray perforated disk 36 is arranged, which is fixed by means of the weld seam 35 between the nozzle body 2 and the valve seat body 5.
  • the spray perforated disk 36 closes the fuel injection valve 1 downstream and covers the bore 7.
  • the fuel flowing through the fuel injection valve 1 is injected into the combustion chamber of the internal combustion engine (not shown) via a plurality of injection holes 37 arranged in the spray-orifice disk 36.
  • a more detailed description of the spray perforated disk 36 is the description of the FIGS. 2 to 4 refer to.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 'of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 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.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the dial 15, there is an armature 20. This is connected via a first flange 21 frictionally with the valve needle 3 in conjunction, which is connected by a weld 22 with the first flange 21.
  • a return spring 23 On the first flange 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • a second flange 31 is arranged, which serves as a lower anchor stop. He is connected via a weld 33 non-positively with the valve needle 3. Between the armature 20 and the second flange 31, an elastic intermediate ring 32 for damping armature bouncers when closing the fuel injection valve 1 is arranged.
  • the armature 20 and the valve seat body 5 run fuel channels 30a to 30c, which conduct the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25 to the bore 7.
  • the fuel injection valve 1 is sealed by a seal 28 against a distribution line, not shown.
  • the first flange 21 is acted on the valve needle 3 by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus the valve needle 3 also in the stroke direction with.
  • the valve closing body 4, which is in operative connection with the valve needle 3, lifts off from the valve seat surface 6, whereby the fuel guided via the fuel channels 30a to 30c to the bore 7 is hosed down.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the first flange 21 from the inner pole 13, whereby the valve needle 3 moves against the stroke direction.
  • the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed.
  • the armature 20 is seated on the anchor stop formed by the second flange 31.
  • Fig. 2 shows in an excerpted sectional view the in Fig. 1 with II designated section of the in Fig. 1 illustrated, the first embodiment of an inventively designed fuel injector. 1
  • a spray orifice plate 36 is arranged, which covers the fuel injection valve 1 to the combustion chamber.
  • the spray perforated disk 36 is fixed to the valve seat body 5 by a weld 35, which connects the valve seat body 5 to the nozzle body 2.
  • the bore 7 is also covered.
  • the injection of the fuel into the combustion chamber of the internal combustion engine take over spray holes 37 which are formed in the spray-disk 36 and offset from the bore 7 arranged centrally in the valve-seat body 5.
  • a deflection of the fuel flow is achieved, which causes the Abspritzlöcher 37 may be less inclined and thereby facilitates their production and increases the precision in the production.
  • the spray perforated disk 36 is curved in the form of a dome in the present exemplary embodiment and adapted to the valve seat body 5.
  • the advantage of the dished shape of the spray perforated disk 36 is on the one hand in the ease of manufacture, on the other hand, in the flexibility with respect to the fuel injection valves 1, which can be equipped with the kalottwholesome spray orifice plate 36.
  • valve closure member 4 which has a plurality of gates 38 in the present embodiment, and the bore 7, it passes into a volume 39 which is formed between an end face 40 of the valve seat body 5 and the spray hole disc 36.
  • the fuel is injected into the combustion chamber of the internal combustion engine with a change of direction through the spray holes 37 formed in the spray-orifice disk 36.
  • the Ab mousselöcher 37 are conically shaped and have in particular sharp exit edges 41 and a funnel-shaped inflow region 42.
  • This hole shape has the particular advantage that the fuel flow within the Abspritzlöcher 37 does not break, so that the outlet openings of the combustion chamber towards the tapered Abspritzlöcher 37 are completely filled over its cross-section with fuel. In this way, coking can be prevented since no recirculation of the fuel in the discharge hole 37 occurs.
  • the spray perforated disk 36 is flexibly applicable for any desired jet opening angle and angle of inclination of the sealing seat as well as for any static flow values through the fuel injection valve 1.
  • Fig. 3 shows in an excerpted sectional view in the same view as Fig. 2 A second embodiment of a fuel injection valve according to the invention 1. The same components are provided with matching reference numerals.
  • the remaining components of the fuel injection valve 1 may be identical to those in FIG Fig. 1 and 2 be formed fuel injector 1 shown.
  • the reduction of the volume 39 allows a homogenization of the fuel flow, which does not come to a halt in the dead times of the fuel injection valve 1. The coking is thereby also reduced.
  • the flow deflection is enhanced by the reduction in the volume 39, whereby the inclination of the Abspritzlöcher 37 can be further reduced and the precision of the production of the Abspritzlöcher 37 can be increased.
  • Fig. 4 shows a detail of a highly schematic representation of a section of the spray perforated disk 36 of an inventively designed fuel injection valve 1 in the area IV in Fig. III.
  • Fig. 4 the conical course of the Abspritzlöcher 37 with the funnel-shaped inlet region 42 and the sharp edges 41 clearly visible.
  • the narrowest cross section of the Abspritzlöcher 37 is formed downstream and ensures a suppression of the recirculation in the Abspritzloch 37, since the fuel flow is not torn off and thereby the outlet cross-section is continuously filled with fuel.
  • the preparation of the Abspritzlöcher 37 in the spray perforated disk 36 can be done by means of single-layer microplating, punching, etching, or laser drilling, the spray orifice plate 36 is still flat. After the preparation of the Abspritzlöcher 37, the spray perforated disk 36 is diced, for example by means of embossing.
  • the invention is not limited to the illustrated embodiments and z. B. also for Inwardly opening fuel injectors 1 of any design applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (11)

  1. Soupape (1) d'injection de carburant pour systèmes d'injection de carburant de moteurs à combustion interne, présentant
    un actionneur (10) excitable, un pointeau de soupape (3) qui est relié fonctionnellement à l'actionneur (10), qui est sollicité en direction de sa fermeture par un ressort de rappel (23) et qui actionne un corps (4) de fermeture de soupape qui forme un siège étanche avec une surface (6) de siège de soupape formée sur un corps (5) de siège de soupape et
    un disque perforé d'injection (36) disposé en aval du corps (5) de siège de soupape, le disque perforé d'injection (36) étant bombé en forme de calotte dans la direction d'écoulement du carburant,
    caractérisée en ce que
    la forme du corps (5) du siège de soupape et celle du disque perforé d'injection (36) sont adaptées l'une à l'autre,
    un volume (39) est formé entre le disque perforé d'injection (36) et le côté frontal (40) du corps (5) de siège de soupape et
    une diminution du volume (39) a pour effet une homogénéisation de l'écoulement du carburant.
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que le disque perforé d'injection (36) est disposé dans une découpe (34) ménagée dans le corps de tuyère (2) de la soupape (1) d'injection de carburant.
  3. Soupape d'injection de carburant selon la revendication 2, caractérisée en ce que le disque perforé d'injection (36) est fixé au moyen d'un cordon de soudure (35) sur le corps de tuyère (2) de la soupape (1) d'injection de carburant.
  4. Soupape d'injection de carburant selon la revendication 3, caractérisée en ce que le cordon de soudure (35) s'étend dans le corps (5) du siège de soupape.
  5. Soupape d'injection de carburant selon l'une des revendications 1 à 4, caractérisée en ce qu'un alésage (7) disposé au centre du corps (5) de siège de soupape est couvert par le disque perforé d'injection (36).
  6. Soupape d'injection de carburant selon l'une des revendications 1 à 5, caractérisée en ce que plusieurs trous de projection (37) sont formés dans le disque perforé d'injection (36).
  7. Soupape d'injection de carburant selon la revendication 6, caractérisée en ce qu'aucun des trous de projection (37) n'est disposé sur l'axe longitudinal de l'alésage (7).
  8. Soupape d'injection de carburant selon les revendications 6 ou 7, caractérisée en ce que les trous de projection (37) ont une forme conique.
  9. Soupape d'injection de carburant selon la revendication 8, caractérisée en ce que les trous de projection (37) se rétrécissent dans la direction d'écoulement du carburant.
  10. Soupape d'injection de carburant selon la revendication 9, caractérisée en ce que du côté de leur entrée, les trous de projection (37) présentent une partie d'amenée (42) en forme d'entonnoir.
  11. Soupape d'injection de carburant selon la revendication 10, caractérisée en ce que du côté aval, les trous de projection (37) présentent des arêtes tranchantes (41).
EP02737742A 2001-04-11 2002-03-16 Soupape d'injection de carburant Expired - Lifetime EP1379778B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118164A DE10118164B4 (de) 2001-04-11 2001-04-11 Brennstoffeinspritzventil
DE10118164 2001-04-11
PCT/DE2002/000966 WO2002084113A1 (fr) 2001-04-11 2002-03-16 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1379778A1 EP1379778A1 (fr) 2004-01-14
EP1379778B1 true EP1379778B1 (fr) 2010-05-19

Family

ID=7681276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02737742A Expired - Lifetime EP1379778B1 (fr) 2001-04-11 2002-03-16 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US20040011894A1 (fr)
EP (1) EP1379778B1 (fr)
JP (1) JP2004518910A (fr)
KR (1) KR20030007944A (fr)
CN (1) CN1461382A (fr)
DE (2) DE10118164B4 (fr)
WO (1) WO2002084113A1 (fr)

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DE10323875A1 (de) * 2003-05-26 2004-12-23 Siemens Ag Mehrlocheinspritzdüse
DE10331267A1 (de) 2003-07-10 2005-02-03 Robert Bosch Gmbh Brennstoffeinspritzsystem
DE10342773A1 (de) * 2003-09-16 2005-11-03 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4030529B2 (ja) * 2004-06-21 2008-01-09 株式会社ケーヒン 燃料噴射弁
DE102005043352B9 (de) 2004-09-13 2011-03-17 Guk Hyun Park Kraftstoffeinspritzsystem
JP4025768B2 (ja) * 2004-09-27 2007-12-26 株式会社ケーヒン 燃料噴射弁
DE102005000620A1 (de) * 2005-01-03 2006-07-13 Robert Bosch Gmbh Multi-Fächerstrahl-Düse und Brennstoffeinspritzventil mit Multi-Fächerstrahl-Düse
DE102006025332A1 (de) 2006-05-31 2007-12-06 Robert Bosch Gmbh Verfahren und Vorrichtung zur Reinigung von Ventilen
JP4906466B2 (ja) * 2006-10-16 2012-03-28 日立オートモティブシステムズ株式会社 燃料噴射弁およびそれを搭載した内燃機関の燃料噴射装置
EP2141350B1 (fr) * 2007-03-27 2013-06-05 Mitsubishi Electric Corporation Soupape d'injection de carburant
US8596555B2 (en) 2008-10-22 2013-12-03 Graco Minnesota Inc. Portable airless sprayer
JP6412379B2 (ja) * 2014-09-18 2018-10-24 日立オートモティブシステムズ株式会社 燃料噴射弁
CN107143450A (zh) * 2017-07-03 2017-09-08 东莞市盈森汽车电喷科技有限公司 喷油器雾化特性可调节球面结构
CN107165755A (zh) * 2017-07-03 2017-09-15 浙江凯利智控科技有限公司 喷油器雾化特性可调节锥体结构
DE102018200341A1 (de) * 2018-01-11 2019-07-11 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil
CN108457787A (zh) * 2018-01-30 2018-08-28 中国第汽车股份有限公司 一种外开式旋流喷射器及其工作方法
US20220234062A1 (en) 2019-05-31 2022-07-28 Graco Minnesota Inc. Handheld fluid sprayer

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Also Published As

Publication number Publication date
DE50214442D1 (de) 2010-07-01
DE10118164B4 (de) 2007-02-08
CN1461382A (zh) 2003-12-10
US20040011894A1 (en) 2004-01-22
JP2004518910A (ja) 2004-06-24
WO2002084113A1 (fr) 2002-10-24
DE10118164A1 (de) 2002-10-24
EP1379778A1 (fr) 2004-01-14
KR20030007944A (ko) 2003-01-23

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