EP0367777B1 - Injection valve - Google Patents

Injection valve Download PDF

Info

Publication number
EP0367777B1
EP0367777B1 EP88905670A EP88905670A EP0367777B1 EP 0367777 B1 EP0367777 B1 EP 0367777B1 EP 88905670 A EP88905670 A EP 88905670A EP 88905670 A EP88905670 A EP 88905670A EP 0367777 B1 EP0367777 B1 EP 0367777B1
Authority
EP
European Patent Office
Prior art keywords
injection valve
valve according
terized
charac
opening
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.)
Revoked
Application number
EP88905670A
Other languages
German (de)
French (fr)
Other versions
EP0367777A1 (en
Inventor
Paolo Bertini
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.)
Siemens AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6809637&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0367777(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0367777A1 publication Critical patent/EP0367777A1/en
Application granted granted Critical
Publication of EP0367777B1 publication Critical patent/EP0367777B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/0667—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 acting as a valve or having a short 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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 relates to an injection valve according to the preamble of claim 1.
  • an injection valve is e.g. described in DE-OS 34 11 337.
  • the fuel is fed via fuel guide holes to a processing hole with a much larger diameter and volume than the fuel guide holes.
  • the fuel should emerge from the fuel guide bores without touching the wall and then impact the wall of the processing bore in order to flow over it in the form of a parabola at the end of the processing bore, in the form of a parabola.
  • a subsequent further processing bore is designed in such a way that its diameter decreases towards an injection section.
  • the spraying section also has teeth directed towards the spraying end.
  • This configuration is intended to avoid the formation of larger fuel droplets, so that the fuel is sprayed evenly.
  • a perforated nozzle for internal combustion engines is known from DE-OS 34 15 905.
  • the nozzle bore having a cylindrical shape is provided at a distance from its area on the inlet side with a surface which deviates from the cylindrical shape and acts as a disturbance for the fuel jet to be sprayed off, in order thereby to achieve a reduction in combustion noise.
  • the invention is based on the object of designing an injection valve in such a way that the amount of fuel sprayed vaporizes better and faster.
  • the inventive solution to this problem is characterized in claim 1. It is based on a special design of the Nozzle opening through which it is possible to give the sprayed fuel jet a richly structured and therefore very large surface area, which promotes the evaporation of the fuel.
  • FIG. 2 shows a partial view of the nozzle body according to FIG. 1 in a greatly enlarged illustration
  • FIG. 4 shows a partial section corresponding to FIG. 2 through a second embodiment of a valve body
  • FIG. 6 shows a partial section like FIG. 4 through a further exemplary embodiment, which differs from that according to FIG. 4 by a different connection between the nozzle body and the valve body,
  • FIG 8 shows a section through the fuel jet according to FIG 6 along line VIII-VIII.
  • the injection valve shown in FIG. 1 has a conventional structure. Only part of the housing 1 is shown, the interior 10 of which is closed at one end by a valve body 5. This has a line 52 concentric to a main axis H, which passes through the valve body from the inside to the outside and which is surrounded on the inside by an annular valve seat 51.
  • a guide pin 2 is arranged concentrically to the main axis H, on which an armature 3 is slidably mounted, which carries a flat closing part 4 at one end. Armature 3 with closing part 4 are pressed down by a spring 6, so that the closing part 4 is seated on the valve seat 51 and thus prevents the escape of fuel from the interior through the line 52.
  • the armature 3 is pulled slightly upwards with the aid of an electromagnet (not shown) and the valve is thereby opened. Without a special measure, a compact fuel jet is created with an essentially circular cross section and a relatively small surface area.
  • the nozzle opening 53 at the end of the line 52 has a special design, which can be clearly seen in particular from FIGS. 3 and 5: it is formed from a circular central opening 530, 530 ⁇ and from three peripheral openings 531, 531 ⁇ , which define the central opening 530, 530 ⁇ expand outwards and which are located in an annular zone 540, 540,, which extends between the central opening 530, 530 ⁇ and the end of the line 52.
  • the ring zone includes with the main axis H an angle of inclination ⁇ which is less than 90 ° and preferably between 30 ° and 60 °: the smaller this angle, the greater the jet cone of the sprayed fuel.
  • the peripheral openings 531, 531 ⁇ are formed symmetrically to minor axes N, which have the same angular distance ⁇ of 120 ° from one another.
  • Each peripheral opening 531, 531 ⁇ is delimited at the end by a semicircular end piece 5310, 5310 ⁇ and two adjoining, mutually opposite side edges 5311. These side edges — as just shown in FIG. 3 — of adjacent peripheral openings each intersect at one point on the circular central opening 530: This results in approximately triangular guide tabs 5401 within the ring zone 540 between adjacent peripheral openings 531, by means of which the diameter of the entire nozzle opening is reduced compared to that of the line 52.
  • valve body 5 and the nozzle body 54 with the nozzle opening 53 are one piece and, because of the stress on the valve seat 51, are made of stainless steel.
  • a separate nozzle body 54 ⁇ , 54 bis is provided, which is preferably a die-cast part (die-cast zinc) and can be easily manufactured with high accuracy.
  • the nozzle opening 53ö réelle is again formed by a circular central opening 530 ⁇ and three peripheral openings 531 ⁇ extending radially outward from it, each of which has a semicircular end piece 5310 ⁇ at the end.
  • This is followed by side edges 5311 ⁇ , which - in contrast to the previously described embodiment - represent arcs.
  • the radius of each peripheral opening is smaller than in the previously described embodiment, so that between the side edges 5311 ⁇ adjacent peripheral openings 531 ⁇ larger guide tabs 540 ⁇ arise.
  • the guide tabs preferably occupy at least 30% of the area of the ring zone, the radial width of the ring zone being between 20% and 50% of the radius of the line 52, 52 ⁇ .
  • valve body 5 and nozzle body 54 are formed in one piece, the shape of this part can be realized using known manufacturing techniques: the valve body can be cast or cold-formed. A combination of the two production steps is particularly expedient, a cast valve body being given its final shape and the exact dimensions by a subsequent cold working. It is also possible to plastically form a valve body with a continuous cylindrical line using a plunger attached to the nozzle opening, that is to say to press material from the area around the nozzle opening into the latter. It should be borne in mind that the diameter of the line 52 is of the order of magnitude of only 1 mm, that is to say that FIGS. 2 to 6 show an approximately 40-fold enlargement of reality.

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)

Abstract

The purpose of the invention is to design an injection valve so that the quantity of fuel injected evaporates completely and as quickly as possible. The nozzle orifice (53) is accordingly located at the end of a cylindrical line (52) and is formed by a central orifice (530) and peripheral orifices (530) grouped around the former. This results, upon injection, in a fuel jet with a multifaceted and consequently very large surface, which promotes evaporation of the injected fuel.

Description

EinspritzventilInjector

Die Erfindung betrifft ein Einspritzventil gemäß Oberbegriff von Anspruch 1. Ein solches Einspritzventil ist z.B. in der DE-OS 34 11 337 beschrieben. Dabei wird der Kraftstoff über Kraftstofführungsbohrungen einer Aufbereitungsbohrung mit we­sentlich größerem Durchmesser und Volumen als die Kraftstoff­führungsbohrungen zugeleitet. Der Kraftstoff soll dabei ohne Wandberührung aus den Kraftstoffführungsbohrungen austreten und danach auf die Wandung der Aufbereitungsbohrung aufprallen, um über diese filmförmig verteilt etwa in Form einer Parabel zum Ende der Aufbereitungsbohrung zu strömen. Eine sich daran an­schließende weitere Aufbereitungsbohrung ist so ausgeführt, daß sich ihr Durchmesser zu einem Abspritzabschnitt hin verringert. Der Abspritzabschnitt weist außerdem zum Abspritzende hin ge­richtete Zähne auf.The invention relates to an injection valve according to the preamble of claim 1. Such an injection valve is e.g. described in DE-OS 34 11 337. In this case, the fuel is fed via fuel guide holes to a processing hole with a much larger diameter and volume than the fuel guide holes. The fuel should emerge from the fuel guide bores without touching the wall and then impact the wall of the processing bore in order to flow over it in the form of a parabola at the end of the processing bore, in the form of a parabola. A subsequent further processing bore is designed in such a way that its diameter decreases towards an injection section. The spraying section also has teeth directed towards the spraying end.

Durch diese Ausgestaltung soll die Bildung größerer Kraftstoff­tröpfchen vermieden werden, sodaß die Kraftstoffabspritzung gleichmäßig erfolgt.This configuration is intended to avoid the formation of larger fuel droplets, so that the fuel is sprayed evenly.

Weiterhin ist aus der DE-OS 34 15 905 eine Lochdüse für Brenn­kraftmaschinen bekannt. Die Zylinderform aufweisende Düsenboh­rung ist mit Abstand von ihrem einlaßseitigen Bereich mit einer von der Zylinderform abweichenden und als Störung für den ab­zuspritzenden Kraftstoffstrahl wirkenden Oberfläche versehen, um dadurch eine Reduzierung der Verbrennungsgeräusche zu erzie­len.Furthermore, a perforated nozzle for internal combustion engines is known from DE-OS 34 15 905. The nozzle bore having a cylindrical shape is provided at a distance from its area on the inlet side with a surface which deviates from the cylindrical shape and acts as a disturbance for the fuel jet to be sprayed off, in order thereby to achieve a reduction in combustion noise.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, ein Ein­spritzventil so auszugestalten, daß die abgespritzte Kraftstoff­menge besser und schneller verdampft.In contrast, the invention is based on the object of designing an injection valve in such a way that the amount of fuel sprayed vaporizes better and faster.

Die erfindungsgemäße Lösung dieser Aufgabe ist in Anspruch 1 gekennzeichnet. Sie beruht auf einer besonderen Gestaltung der Düsenöffnung, durch die es gelingt, dem abgespritzten Kraft­stoffstrahl eine reich gegliederte und damit sehr große Oberflä­che zu geben, die die Verdampfung des Kraftstoffes fördert.The inventive solution to this problem is characterized in claim 1. It is based on a special design of the Nozzle opening through which it is possible to give the sprayed fuel jet a richly structured and therefore very large surface area, which promotes the evaporation of the fuel.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteran­sprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.

Die Erfindung wird anhand der Figuren näher erläutert; es zeigenThe invention is illustrated by the figures; show it

FIG 1 einen Längsschnitt durch einen Teil eines Einspritzven­tils,1 shows a longitudinal section through part of an injection valve,

FIG 2 eine Teilansicht des Düsenkörpers nach FIG 1 in stark vergrößerter Darstellung,2 shows a partial view of the nozzle body according to FIG. 1 in a greatly enlarged illustration,

FIG 3 einen Teilschnitt entlang Linie III-III in FIG 2,3 shows a partial section along line III-III in FIG. 2,

FIG 4 einen Teilschnitt entsprechend FIG 2 durch eine zweite Ausführungsform eines Ventilkörpers,4 shows a partial section corresponding to FIG. 2 through a second embodiment of a valve body,

FIG 5 einen Teilschnitt entlang Linie V-V in FIG 4,5 shows a partial section along line V-V in FIG. 4,

, FIG 6 einen Teilschnitt wie FIG 4 durch ein weiteres Ausfüh­rungsbeispiel, das sich von dem nach FIG 4 durch eine andere Verbindung zwischen Düsenkörper und Ventilkörper unterscheidet,6 shows a partial section like FIG. 4 through a further exemplary embodiment, which differs from that according to FIG. 4 by a different connection between the nozzle body and the valve body,

FIG 7 schematisch die mit einem erfindungsgemäßen Einspritz­ventil erreichbare Hüllfläche des abgespritzten Kraft­stoffes und,7 schematically shows the envelope surface of the sprayed fuel that can be achieved with an injection valve according to the invention, and

FIG 8 einen Schnitt durch den Kraftstoffstrahl gemäß FIG 6 entlang Linie VIII-VIII.8 shows a section through the fuel jet according to FIG 6 along line VIII-VIII.

Abgesehen von der anhand von FIG 2 ff. erläuterten, besonderen Gestaltung der Düsenöffnung hat das in FIG 1 dargestellt Ein­spritzventil einen konventionellen Aufbau. Davon ist lediglich teilweise das Gehäuse 1 dargestetlt, dessen Innenraum 10 an ei­nem Ende durch einen Ventilkörper 5 abgeschlossen ist. Dieser hat konzentrisch zu einer Hauptachse H eine Leitung 52, die den Ventilkörper von Innen nach Außen durchsetzt und die auf der In­nenseite von einem ringförmigen Ventilsitz 51 umgeben ist.Apart from the special design of the nozzle opening explained with reference to FIGS. 2 ff., The injection valve shown in FIG. 1 has a conventional structure. Only part of the housing 1 is shown, the interior 10 of which is closed at one end by a valve body 5. This has a line 52 concentric to a main axis H, which passes through the valve body from the inside to the outside and which is surrounded on the inside by an annular valve seat 51.

In dem Innenraum 10 ist konzentrisch zur Hauptachse H ein Füh­rungsbolzen 2 angeordnet, auf dem ein Anker 3 verschiebbar ge­lagert ist, der an einem Ende ein flaches Schließteil 4 trägt. Anker 3 mit Schließteil 4 werden durch eine Feder 6 nach unten gedrückt, so daß der Schließteil 4 auf dem Ventilsitz 51 auf­sitzt und so den Austritt von Kraftstoff aus dem Innenraum durch die Leitung 52 unterbindet. Zum Abspritzen von Kraftstoff wird mit Hilfe eines nicht dargestellten Elektromagneten der Anker 3 geringfügig nach oben gezogen und dadurch das Ventil geöffnet. Ohne besondere Maßnahme entsteht dabei ein kompakter Kraftstoffstrahl mit im wesentlichen kreisförmigem Quersschnitt und relativ geringer Oberfläche.In the interior 10, a guide pin 2 is arranged concentrically to the main axis H, on which an armature 3 is slidably mounted, which carries a flat closing part 4 at one end. Armature 3 with closing part 4 are pressed down by a spring 6, so that the closing part 4 is seated on the valve seat 51 and thus prevents the escape of fuel from the interior through the line 52. To spray fuel, the armature 3 is pulled slightly upwards with the aid of an electromagnet (not shown) and the valve is thereby opened. Without a special measure, a compact fuel jet is created with an essentially circular cross section and a relatively small surface area.

Durch die Erfindung gelingt es, die Oberfläche des Kraftstoff­strahles wesentlich zu vergrößern. Hierzu hat die Düsenöffnung 53 am Ende der Leitung 52 eine spezielle Gestaltung, die insbe­sondere aus den Figuren 3 und 5 deutlich zu erkennen ist: Sie wird gebildet aus einer kreisförmigen Zentralöffnung 530, 530ʹ und von drei Peripherieöffnungen 531, 531ʹ, die die Zentralöff­nung 530, 530ʹ nach außen erweitern und die in einer Ringzone 540, 540ʹ liegen, die sich zwischen der Zentralöffnung 530, 530ʹ und dem Ende der Leitung 52 erstreckt. Die Ringzone schließt mit der Hauptachse H einen Neigungswinkel α ein, der kleiner als 90° ist und vorzugsweise zwischen 30° und 60° liegt: Je kleiner dieser Winkel ist, umso größer ist der Strahlkegel des abgespritzten Kraftstoffes.The invention enables the surface area of the fuel jet to be substantially enlarged. For this purpose, the nozzle opening 53 at the end of the line 52 has a special design, which can be clearly seen in particular from FIGS. 3 and 5: it is formed from a circular central opening 530, 530ʹ and from three peripheral openings 531, 531ʹ, which define the central opening 530, 530ʹ expand outwards and which are located in an annular zone 540, 540,, which extends between the central opening 530, 530ʹ and the end of the line 52. The ring zone includes with the main axis H an angle of inclination α which is less than 90 ° and preferably between 30 ° and 60 °: the smaller this angle, the greater the jet cone of the sprayed fuel.

Die Peripherieöffnungen 531, 531ʹ sind symmetrisch zu Nebenach­sen N ausgebildet, die voneiander gleichen Winkelabstand β von 120° haben. Jede Peripherieöffnung 531, 531ʹ ist am Ende be­grenzt durch ein halbkreisförmiges Endstück 5310, 5310ʹ und zwei daran anschließende, einander gegenüberliegende Seitenrän­der 5311. Diese Seitenränder - gemäß FIG 3 gerade ausgeführt-­von benachbarten Peripherieöffnungen schneiden sich jeweils in einem Punkt auf der kreisförmigen Zentralöffnung 530: Dadurch entstehen innerhalb der Ringzone 540 zwischen benachbarten Pe­ripherieöffnungen 531 etwa dreieckförmige Führungslappen 5401, durch die der Durchmesser der gesamten Düsenöffnung im Ver­gleich zu dem der Leitung 52 reduziert ist. Als Folge davon entstehen beim Abspritzen des Kraftstoffes je Peripherieöffnung ein Peripheriestrahl, der über ein schmales Verbindungsstück mit einem Zentralstrahl zusammenhängt, wie dies die FIG 7 und 8 zeigen. Die Oberfläche des daraus resultierenden Gesamtstrahles ist offensichtlich wesentlich größer als die eines kompakten Strahles mit im wesentlichen kreisförmigem Querschnitt.The peripheral openings 531, 531ʹ are formed symmetrically to minor axes N, which have the same angular distance β of 120 ° from one another. Each peripheral opening 531, 531ʹ is delimited at the end by a semicircular end piece 5310, 5310ʹ and two adjoining, mutually opposite side edges 5311. These side edges — as just shown in FIG. 3 — of adjacent peripheral openings each intersect at one point on the circular central opening 530: This results in approximately triangular guide tabs 5401 within the ring zone 540 between adjacent peripheral openings 531, by means of which the diameter of the entire nozzle opening is reduced compared to that of the line 52. As a result of this, when the fuel is sprayed out, a peripheral jet is created for each peripheral opening, which is connected to a central jet via a narrow connecting piece, as shown in FIGS. 7 and 8. The surface of the resulting total jet is obviously much larger than that of a compact jet with an essentially circular cross section.

Gemäß FIG 2 und 3 ist der Ventilkörper 5 und der Düsenkörper 54 mit Düsenöffnung 53 ein Stück und besteht - wegen der Beanspru­chung des Ventilsitzes 51 - aus rostfreiem Stahl. Im Gegensatz dazu ist gemäß Fig 4 bis 6 ein separater Düsenkörper 54ʹ, 54ʺ vorgesehen, der vorzugsweise ein Druckgußteil (Zinkdruckguß) ist und sich einfach mit hoher Genauigkeit herstellen läßt.According to FIGS. 2 and 3, the valve body 5 and the nozzle body 54 with the nozzle opening 53 are one piece and, because of the stress on the valve seat 51, are made of stainless steel. In contrast to this, according to FIGS. 4 to 6, a separate nozzle body 54ʺ, 54 bis is provided, which is preferably a die-cast part (die-cast zinc) and can be easily manufactured with high accuracy.

Bei dem Ausführungsbeispiel nach FIG 4 und 5 ist die Düsenöff­nung 53ʹ wieder von einer kreisförmigen Zentralöffnung 530ʹ und drei von ihr radial nach außen sich erstreckenden Peripherieöff­nungen 531ʹ gebildet, von denen jede am Ende ein halbkreisförmi­ges Endstück 5310ʹ hat. Daran schließen sich Seitenränder 5311ʹ an, die - im Gegensatz zum vorher beschriebenen Ausführungsbei­spiel - Kreisbogen darstellen. Der Radius jeder Peripherieöff­nung ist kleiner als im zuvor erläuterten Ausführungsbeispiel, so daß zwischen den Seitenrändern 5311ʹ benachbarte Peripherie­öffnungen 531ʹ größere Führungslappen 540ʹ entstehen.In the exemplary embodiment according to FIGS. 4 and 5, the nozzle opening 53öffnung is again formed by a circular central opening 530ʹ and three peripheral openings 531ʹ extending radially outward from it, each of which has a semicircular end piece 5310ʹ at the end. This is followed by side edges 5311ʹ, which - in contrast to the previously described embodiment - represent arcs. The radius of each peripheral opening is smaller than in the previously described embodiment, so that between the side edges 5311ʹ adjacent peripheral openings 531ʹ larger guide tabs 540ʹ arise.

Vorzugsweise nehmen die Führungslappen wenigstens 30% der Flä­che der Ringzone ein, wobei die radiale Breite der Ringzone zwischen 20% und 50% des Radius der Leitung 52, 52ʹ liegt.The guide tabs preferably occupy at least 30% of the area of the ring zone, the radial width of the ring zone being between 20% and 50% of the radius of the line 52, 52ʹ.

Wenn - wie in FIG 1 bis 3 - Ventilkörper 5 und Düsenkörper 54 einstückig ausgebildet sind, läßt sich die Form dieses Teiles mit bekannten Fertigungstechniken realisieren: Der Ventilkörper kann gegossen oder kalt verformt werden. Besonders zweckmäßig ist eine Kombination beider Fertigungsschritte, wobei ein ge­gossener Ventilkörper seine endgültige Form und die exakten Ab­messungen durch eine anschließende Kaltverformung erhält. Auch ist es möglich, einen Ventilkörper mit durchgehender zylindri­scher Leitung mit Hilfe eines an der Düsenöffnung aufgesetzten Stempels plastisch zu formen, also Material aus dem Bereich um die Düsenöffnung in diese hinein zu drücken. Dabei ist zu be­denken, daß der Durchmesser der Leitung 52 in der Größenordnung von nur einem 1 mm liegt, die FIG 2 bis 6 also eine etwa 40-fache Vergrößerung der Wirklichkeit zeigen.If, as in FIGS. 1 to 3, valve body 5 and nozzle body 54 are formed in one piece, the shape of this part can be realized using known manufacturing techniques: the valve body can be cast or cold-formed. A combination of the two production steps is particularly expedient, a cast valve body being given its final shape and the exact dimensions by a subsequent cold working. It is also possible to plastically form a valve body with a continuous cylindrical line using a plunger attached to the nozzle opening, that is to say to press material from the area around the nozzle opening into the latter. It should be borne in mind that the diameter of the line 52 is of the order of magnitude of only 1 mm, that is to say that FIGS. 2 to 6 show an approximately 40-fold enlargement of reality.

Am Einfachsten läßt sich eine hohe Genauigkeit mit einem separa­ten Düsenkörper 54ʹ, 54ʺ aus Zinkdruckguß sicherstellen, der ge­mäß FIG 4 und 5 mittels eines Düsenrohres 541ʹ und gemäß FIG 6 mittels eines Düsenflansches 542ʺ mit dem Ventilkörper 5ʹ, 5ʺ verbunden ist. Im erstgenannten Fall ist eine kraft- oder mate­rialschlüssige, im letztgenannten Fall eine formschlüssige Ver­bindung mittels eines Bördelrandes 50ʺ vorgesehen.The simplest way to ensure high accuracy is with a separate die-cast die body 54ʹ, 54ʺ, which is connected to the valve body 5ʹ, 5ʺ according to FIGS. 4 and 5 by means of a nozzle tube 541rohr and according to FIG. 6 by means of a nozzle flange 542ʺ. In the former case, a non-positive or material connection, in the latter case a positive connection by means of a flanged edge 50ʺ is provided.

Claims (11)

1. Injection valve for injecting fuel into the intake duct of an internal-combustion engine,
- having a valve body (5, 5ʹ, 5ʺ) that, on the inside of the injection valve, has an annular valve seat (51) that is concentric to a principal axis (H), having a closing part (4) that is arranged in such a way as to be displaceable along the principal axis (H), is pressed against the valve seat (51) by a spring (6) and can be lifted off from the valve seat (51) by an electromagnet,
- having a line (52, 52ʹ, 52ʺ) that passes through the valve body (5, 5ʹ, 5ʺ) within the valve seat (51) from the inside towards the outside and, at the outside, opens into a nozzle opening (53, 53ʹ), characterized in that
- the closing part (4) is of flat design,
- the line (52, 52ʹ, 52ʺ) is cylindrical and has a constant diameter,
- the nozzle opening (53, 53ʹ, 53ʺ) is formed by a central opening (530, 530ʹ) and by peripheral openings (531, 531ʹ) that surround the central opening, widen it outwards and are separated from one another by guide lugs (5401, 5401ʹ),
- the peripheral openings (531, 531ʹ) and the guide lugs (5401, 5401ʹ) lie in an annular zone (540, 540ʹ) that is arranged between the central opening (530, 530ʹ) having the smaller diameter and the end of the line (52, 52ʹ) having the larger diameter and encloses an acute angle of inclination α of < 90° with the principal axis (H).
2. Injection valve according to Claim 1, charac­terized in that the guide lugs (5401, 5401ʹ) occupy at least 30% of the area of the annular zone (540, 540ʹ).
3. Injection valve according to Claim 2, charac­terized in that the nozzle opening (53, 53ʹ, 53ʺ) lies coaxially to the principal axis (H).
4. Injection valve according to Claim 3, charac­terized in that each peripheral opening (531, 531ʹ) is symmetrical to a secondary axis (N), and in that the secondary axes (N) of all peripheral openings proceed from the principal axis (H) and have the same angular spacing (β) from one another.
5. Injection valve according to Claim 4, charac­terized by three peripheral openings (531, 531ʹ) and an angular spacing (β) of 120°.
6. Injection valve according to Claim 4 or 5, characterized in that the end of each peripheral opening (531, 531ʹ) is bounded by a semicircular end piece (5310, 5310ʹ).
7. Injection valve according to Claim 6, charac­terized in that two lateral edges (5311, 5311ʹ) lying opposite one another extend between the end piece (5310, 5310ʹ) of each peripheral opening (531, 531ʹ) and the central opening (530, 530ʹ).
8. Injection valve according to Claim 7, charac­terized in that the lateral edges (5311) extend in a straight line and in that the two lateral edges (5311) of adjacent peripheral openings (531) intersect at a point on the circular central opening (530).
9. Injection valve according to Claim 8, charac­terized in that the lateral edges (5311ʹ) are circular arcs and in that the lateral edges (5311ʹ) of adjacent peripheral openings (531ʹ) reach the circular central opening (530ʹ) at a distance from one another.
10. Injection valve according to one of Claims 1 to 9, characterized in that the annular zone (540ʹ) with the nozzle opening(53ʹ, 53ʺ) is part of a separate nozzle body (54ʹ, 54ʺ) that is secured to the valve body (5ʹ, 5ʺ).
11. Injection valve according to Claim 10, charac­terized in that the nozzle body (54ʹ, 54ʺ) is a die-cast part.
EP88905670A 1987-07-01 1988-06-30 Injection valve Revoked EP0367777B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8709111U 1987-07-01
DE8709111U DE8709111U1 (en) 1987-07-01 1987-07-01 Injector

Publications (2)

Publication Number Publication Date
EP0367777A1 EP0367777A1 (en) 1990-05-16
EP0367777B1 true EP0367777B1 (en) 1991-02-20

Family

ID=6809637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88905670A Revoked EP0367777B1 (en) 1987-07-01 1988-06-30 Injection valve

Country Status (4)

Country Link
US (1) US4986478A (en)
EP (1) EP0367777B1 (en)
DE (2) DE8709111U1 (en)
WO (1) WO1989000244A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT214617Z2 (en) * 1988-06-23 1990-05-09 Weber Srl NOZZLE FOR A FUEL DOSING AND SPRAYING VALVE FOR AN INTERNAL COMBUSTION ENGINE FEEDING DEVICE
DE58902133D1 (en) * 1988-06-28 1992-10-01 Siemens Ag ELECTROMAGNETIC FUEL INJECTION VALVE.
KR930004967B1 (en) * 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 Electronic fuel injector
IT1231875B (en) * 1989-03-14 1992-01-14 Weber Srl IMPROVEMENT IN THE FUEL SUPPLY CIRCUIT IN A VALVE FOR FUEL INJECTION FOR AN INTERNAL COMBUSTION ENGINE WITH ELECTROMAGNETIC DRIVE
DE3942306A1 (en) * 1989-12-21 1991-06-27 Bosch Gmbh Robert ELECTROMAGNETICALLY ACTUABLE VALVE
JP2559515B2 (en) * 1990-02-23 1996-12-04 株式会社日立製作所 Fuel injection valve device and manufacturing method thereof
JP3002286B2 (en) * 1991-03-15 2000-01-24 ヤマハ発動機株式会社 Intake system for fuel injection type 4-cycle engine
IT1250846B (en) * 1991-10-11 1995-04-21 Weber Srl ELECTROMAGNETIC-OPERATED FUEL DOSING AND PULVERIZING VALVE WITH VERY LOW DIMENSIONS
DE19937961A1 (en) 1999-08-11 2001-02-15 Bosch Gmbh Robert Fuel injection valve and method for producing outlet openings on valves
US6625971B2 (en) * 2001-09-14 2003-09-30 United Technologies Corporation Fuel nozzle producing skewed spray pattern
US6659074B2 (en) * 2002-05-08 2003-12-09 General Motors Corporation Spark ignition direct injection engine with shaped multihole injectors
JP6429461B2 (en) * 2013-05-13 2018-11-28 株式会社エンプラス Nozzle plate for fuel injector

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344270C (en) * 1920-08-15 1921-11-21 Hille Werke Ag Fuel nozzle disc for oil engines
US4099494A (en) * 1976-10-19 1978-07-11 Caterpillar Tractor Co. Fuel spray
DD134976B1 (en) * 1978-03-16 1980-12-24 Helmut Nehrig INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES
IT1122430B (en) * 1979-08-03 1986-04-23 Alfa Romeo Spa QUICK TRANSITOR ELECTROINJECTOR
CA1185850A (en) * 1982-01-11 1985-04-23 Essex Group, Inc. Electromagnetic fuel injector with improved discharge structure
JPS59131575U (en) * 1983-02-23 1984-09-04 トヨタ自動車株式会社 Fuel injection valve for electronically controlled engines
GB2144177B (en) * 1983-07-28 1987-01-07 Lucas Ind Plc Fuel injector
DE3411337A1 (en) * 1984-03-28 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION VALVE
DE3415905A1 (en) * 1984-04-28 1985-11-07 Daimler-Benz Ag, 7000 Stuttgart Hole type nozzle for internal combustion engine with direct injection
GB8611950D0 (en) * 1986-05-16 1986-06-25 Lucas Ind Plc Gasoline injector

Also Published As

Publication number Publication date
EP0367777A1 (en) 1990-05-16
WO1989000244A1 (en) 1989-01-12
DE3861795D1 (en) 1991-03-28
US4986478A (en) 1991-01-22
DE8709111U1 (en) 1987-09-17

Similar Documents

Publication Publication Date Title
DE19827220B4 (en) Fuel injection valve for an internal combustion engine
DE69509889T2 (en) FUEL INJECTION VALVE WITH MULTIPLE HOLE DISC ELEMENTS
DE10303859B4 (en) Nozzle assembly for injection and turbulence of fuel
DE60106668T2 (en) Fuel injection valve for generating turbulence by a single plate
DE69806509T2 (en) FLAT NEEDLE FOR A PRESSURIZED SWIRL INJECTION VALVE
DE10118163B4 (en) Fuel injector
DE60022234T2 (en) Fuel injection valve and internal combustion engine
DE10049518B4 (en) Fuel injector
EP0367777B1 (en) Injection valve
DE3105686A1 (en) &#34;FUEL INJECTION NOZZLE&#34;
DE69808788T2 (en) SPACE-SAVING ELECTROMAGNETICALLY ACTUABLE EXHAUST GAS RECIRCULATION VALVE
WO2016082983A1 (en) Gas injector comprising an outwardly-opening valve closure element
DE10231443B4 (en) Fuel injection valve
DE3121572A1 (en) &#34;INJECTION VALVE&#34;
DE68905502T2 (en) FUEL INJECTION VALVE.
DE10118164B4 (en) Fuel injector
EP1432909B1 (en) Fuel-injection valve
EP1407137B1 (en) Fuel injection valve for internal combustion engines
DE3151020C2 (en)
EP1408231A1 (en) Injection device for fuel injection
DE4222628A1 (en) Fuel injector
DD139739A1 (en) Fuel injection nozzle
DE69809197T2 (en) PNEUMATICALLY SUPPORTED FUEL INJECTION NOZZLE
DE10046306A1 (en) Fuel injector
WO2019201532A1 (en) Nozzle assembly for a fuel injector, and fuel injector

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890925

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19900717

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3861795

Country of ref document: DE

Date of ref document: 19910328

ET Fr: translation filed
ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: ROBERT BOSCH GMBH

Effective date: 19911112

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920521

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920624

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920824

Year of fee payment: 5

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19921002

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 921002