EP0988449B1 - Fuel injection device - Google Patents

Fuel injection device Download PDF

Info

Publication number
EP0988449B1
EP0988449B1 EP99914552A EP99914552A EP0988449B1 EP 0988449 B1 EP0988449 B1 EP 0988449B1 EP 99914552 A EP99914552 A EP 99914552A EP 99914552 A EP99914552 A EP 99914552A EP 0988449 B1 EP0988449 B1 EP 0988449B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
fuel injection
injection device
nozzle bores
bores
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
EP99914552A
Other languages
German (de)
French (fr)
Other versions
EP0988449A1 (en
Inventor
Johannes Flarup
Henrik Bjerregaard
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.)
MAN B&W Diesel AS
Original Assignee
MAN B&W Diesel AS
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 MAN B&W Diesel AS filed Critical MAN B&W Diesel AS
Publication of EP0988449A1 publication Critical patent/EP0988449A1/en
Application granted granted Critical
Publication of EP0988449B1 publication Critical patent/EP0988449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806Injection 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F2007/0097Casings, e.g. crankcases or frames for large diesel engines

Definitions

  • the invention relates to a fuel injection device for Internal combustion engines, especially two-stroke large diesel engines, according to the preamble of claim 1.
  • a fuel injection device of this type is known from EP 0 606 371 B1 known.
  • the central exhaust valve provided for the cylinder head must be Fuel injection devices generally in the area of Periphery of the combustion chamber can be arranged.
  • the nozzle bores the nozzle head are arranged so that one after main injection direction on one side of the nozzle head results.
  • the nozzle holes are in relation to the axis of the Blind hole not arranged radially, but have one for Main injection direction towards the course. this leads to different lengths of the nozzle bores with each other and to different bore lengths over the circumference of individual Holes.
  • the measures according to the invention ensure that at all Nozzle holes almost the same conditions for one unimpeded entry of the fuel can be reached. Let it be yourself with the help of the entrance chambers in an advantageous manner achieve the same bore lengths for all nozzle bores. Likewise, the scope of the individual Nozzle bores reach unchanging jacket lengths.
  • the Measures according to the invention therefore lead in an advantageous manner Way, overall at equal aspect ratios, resulting in a Uniformization of wall friction and flow velocities and thus a stable overall Injection jet leads.
  • the Entrance chambers as hemispherical in cross section Recesses of the nozzle head can be formed.
  • the hemispherical recesses allow advantageously Way of creating exactly the same wetting angle over the whole Scope of a nozzle bore. They are useful hemispherical recesses arranged so that you Center point on the axis of the assigned nozzle bore lies, so that this with respect to the center of the assigned Entrance chamber is centered.
  • the formation of the entrance chambers as hemispherical Recesses of the nozzle head also ensure that a simple way to match each nozzle bore Entrance chamber can be assigned without the nozzle head would be weakened too much.
  • Another advantage is the fact that the hemispherical Recesses can be arranged so that in the area between two neighboring ones Recesses each result in a standing web, which as Guide bar for the slide element can act, whereby it is protected against wear.
  • Another advantageous embodiment of the parent Measures can be that the entrance chambers as annular segment-shaped recesses of the nozzle head are. This is a particularly inexpensive manufacture possible. The design also enables it to be achieved comparatively well adapted to a value of 90 ° contact angle in the transition area between a nozzle bore and the each assigned entrance chamber.
  • Another advantage is that one of the others Nozzle holes flanked by the middle group of Nozzle holes assigned a common entrance chamber can be without the nozzle head being weakened too much.
  • the injection valve 1 on which FIG. 1 is based consists of a box-shaped, tapering towards the front Jacket housing 2, which is provided with a blind hole 3
  • Nozzle head 4 carries. This is supported by a rear one Flange on a front collar of the casing 2.
  • the Nozzle head 4 closes with its rear end to one in Shell housing 2 received guide sleeve 5, which with one to the blind bore 3 of the nozzle head 4 coaxial Through hole 6 is provided.
  • This has one step-shaped constriction, which is designed as a valve seat 7, with which cooperates a valve body 8, the one in the Guide sleeve 5 arranged shaft 9 protrudes.
  • the diameter of the valve body 8 is smaller than the diameter of the shaft 9, so that a surrounding the valve body 8 for Bore 6 belonging annulus 10 results.
  • the shaft 9 is connected to a central fuel line connected bore 11 which can be filled with fuel provided with the annular space 10 via tap holes 12 connected is.
  • the valve body 8 is by the action of a not shown here, with the shaft 9 cooperating return spring to the sealing seat 7 pressed. With a corresponding pressure increase in the Annulus 10 pending fuel, the valve body 8 from assigned sealing seat 7 is lifted, which is a Connection of the area to which fuel can be applied with the Blind hole 3 of the nozzle head 4 results.
  • the nozzle head 4 is in its lower area with several, approximately arranged at the same height next to each other, transverse to the axis of the Blind bore 3 extending nozzle holes 13 provided about which the fuel into an associated combustion chamber is injectable.
  • annular slide element 15 is provided, the lower edge forms a control edge passing over the nozzle bores 13 which is arranged so that the nozzle bores 13 are open when the valve body 8 is lifted off the associated valve seat 7 and that the nozzle bores 13 are closed when the Valve body 8 rests on valve seat 7. This position is the figure 1 underlying.
  • each several approximately in the direction of the axis of the blind bore 3 arranged at the same height, laterally offset from each other Nozzle bores 13 are provided, as in FIGS. 2 and 3 can be clearly seen.
  • the nozzle bores 13 can Axially normal or, as in Figure 4, slightly outward be inclined. Because of the nozzle bores 13 in common generated injection jet should not diverge too much, are the No nozzle bores 13 with respect to the axis of the blind bore 3 arranged radially, but opposite to a radial Main injection direction turned so that there is a smaller Diverging or scattering angle results.
  • the nozzle bores 13 up to without changing the cross section would go to blind hole 3, would be very strong divergent inflow ratios to the individual Nozzle bores 13 and also within individual ones Nozzle holes 13.
  • the two outer ones Nozzle bores 13 of the four provided next to each other arranged nozzle holes 13 comprising row of holes would be significantly longer than the inner nozzle bores 13, whereby in the area of these outer nozzle bores 13 whose scope would also result in different lengths. This Conditions would lead to bad combustion and thus to high fuel consumption and too high Lead to pollutant emissions etc.
  • the above are used to form mentioned entrance chambers starting from the blind bore 3, hemispherical recesses 17 of the nozzle head 4 intended.
  • the hemispherical recesses 17 can simply by electrolytic material removal with the help of a according to the EDM (electrical discharge machining) process working device are manufactured.
  • the nozzle bores 13 themselves are simply drilled using a laser beam.
  • Recesses 17 are arranged so that their center each lies on the axis of the associated nozzle bore 13. On this results in centering of the nozzle bores 13 with respect to the assigned entrance chamber. This centering ensures that in the area of the transition between Entry chamber and nozzle bore 13 all over Hole circumference results in a roughly constant contact angle, as indicated in Figure 2 at 18.
  • each assigned hemispherical recesses 17 are so dimensioned that between two adjacent hemispherical recesses 17 a web 19 remains, which acts as a guide bar for the annular slide element 15 can act so that this also in the area of Entrance chambers are reliably supported, which is advantageous affects the achievement of a long lifespan.
  • Nozzle bores 13 are assigned to an input chamber 16. at that on which FIG. 2 is based, preferred Embodiment are all nozzle holes 13 through hemispherical recesses 17 formed entrance chambers assigned what particularly good combustion conditions and thus expect particularly low fuel consumption leaves.
  • FIG. 3 is based the nozzle bores 13 as ring segment-shaped recesses 20 of the nozzle head 4 assigned input chambers.
  • the radii of the ring segment-shaped recesses 20 are included so to the respectively assigned nozzle bore 13 or Nozzle holes 13 adapted that in the transition area between the input chamber and nozzle bore 13 as possible edge angle approximated to 90 ° results, as in FIG. 3 at 21 is indicated.
  • each nozzle bore 13 it would be conceivable for each nozzle bore 13 to have its own one To assign ring segment 20 formed entrance chamber.
  • the two middle nozzle bores 13 a common, formed by a ring segment 20 Assigned to the entrance chamber.
  • This ring segment 20 corresponds a section of the axis of the blind hole 3 of the Nozzle head 4 coaxial ring groove and is characterized by the neighboring, assigned to the two outer nozzle bores 13 Ring segments 20, which have a smaller radius, limited.
  • outer ring segments 20 are arranged so that you Center point on the axis of the assigned nozzle bore 13 is located, so that this with respect to the associated Entrance chamber is centered, resulting in an equalization of the Inflow conditions over the entire circumference of the bore contributes.
  • the center of the two middle nozzle bores 13th assigned ring segment 20 is in the area between the two axes of the two associated nozzle bores 13.
  • FIGS. 3 and 4 are based on an example larger diameter than the nozzle bores 13 Cutout 22 provided. This leads to a step-like Cross-sectional expansion with one to the respective bore axis normal ring surface surrounding the end of the bore 23.
  • the Cutout 22 ensures that the nozzle bore 13th emerging beam experiences no interference.

Landscapes

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

Abstract

A fuel injection device for internal combustion engines, especially two-stroke diesel engines, comprising an eccentric injection-nozzle tip (4) protruding into an associated combustion chamber, whereby said nozzle tip has a pocket drill hole (3) with several outgoing injection-nozzle drill holes (13) which can be impinged upon with fuel. At least the axes of the outer nozzle tip drill holes (13) of said row of drill holes are directed inwards in relation to a radial progression. The conditions for fuel admission are approximately the same for all nozzle drill holes (13) resulting in a stable jet. Admission chambers (16) depart from the pocket drill hole (3) and are assigned to at least one part of the nozzle drill holes (13), whereby the diameter inside the chambers is greater than the diameter of the nozzle drill holes (13) and said chambers are designed in such a way that at least similar length ratios exist for all nozzle drill holes (13) in the row of drill holes.

Description

Die Erfindung betrifft eine Brennstoffeinspritzvorrichtung für Brennkraftmaschinen, insbesondere Zweitakt-Großdieselmotoren, gemäß Oberbegriff des Anspruchs 1.The invention relates to a fuel injection device for Internal combustion engines, especially two-stroke large diesel engines, according to the preamble of claim 1.

Eine Brennstoffeinspritzvorrichtung dieser Art ist aus der EP 0 606 371 B1 bekannt. Bei Zweitakt-Großdieselmotoren mit einem im Zylinderkopf vorgesehenen, zentralen Auslassventil muss die Brennstoffeinspritzvorrichtun in der Regel im Bereich der Peripherie des Brennraums angeordnet sein. Die Düsenbohrungen des Düsenkopfes sind dabei so angeordnet, daß sich eine nach einer Seite vom Düsenkopf abgehende Haupteinspritzrichtung ergibt. Um eine große seitliche Streuung des Einspritzstrahls zu vermeiden, sind die Düsenbohrungen bezüglich der Achse der Sackbohrung nicht radial angeordnet, sondern besitzen einen zur Haupteinspritzrichtung hin gewandten Verlauf. Dies führt zu unterschiedlichen Längen der Düsenbohrungen untereinander und zu unterschiedlichen Bohrungslängen über dem Umfang einzelner Bohrungen. Gleichzeitig ergeben sich stark unterschiedliche Randwinkel im Bereich der inneren Enden der Düsenbohrungen. Es ergeben sich somit sehr unterschiedliche Verhältnisse für den Brennstoffeintritt in die einzelnen Düsenbohrungen und dementsprechend unterschiedliche Geschwindigkeiten und Durchsatzmengen. Insbesondere im Bereich der äußeren Düsenbohrungen einer aus mehreren nebeneinander angeordneten Düsenbohrungen bestehenden Bohrungsreihe liegen besonders ungünstige Verhältnisse vor, da sich hier über dem Umfang der einzelnen Bohrungen stark unterschiedliche Wandlängen ergeben. In Folge der insbesondere im Bereich der äußeren Flanken besonders hohen Wandreibung ergibt sich hier eine besonders instabile Strömung, was dazu führt, daß der Einspritzstrahl wenig Luft mitreißt. Die Folge davon sind eine schlechte Gemischaufbereitung und damit eine schlechte Verbrennung, was zu einem erhöhten Brennstoffverbrauch und zu einem erhöhten Schadstoffausstoß führt.A fuel injection device of this type is known from EP 0 606 371 B1 known. In large two-stroke diesel engines with an The central exhaust valve provided for the cylinder head must be Fuel injection devices generally in the area of Periphery of the combustion chamber can be arranged. The nozzle bores the nozzle head are arranged so that one after main injection direction on one side of the nozzle head results. To ensure a large lateral spread of the injection jet too to avoid, the nozzle holes are in relation to the axis of the Blind hole not arranged radially, but have one for Main injection direction towards the course. this leads to different lengths of the nozzle bores with each other and to different bore lengths over the circumference of individual Holes. At the same time, there are very different ones Contact angle in the area of the inner ends of the nozzle bores. This results in very different conditions for the Fuel entry into the individual nozzle bores and accordingly different speeds and Throughput volumes. Especially in the area of the outer Nozzle holes one of several arranged side by side Existing row of nozzles are particularly prominent unfavorable conditions because here the extent of individual bores result in very different wall lengths. As a result, especially in the area of the outer flanks a particularly high wall friction results here unstable flow, which causes the injection jet to be little Air entrains. The result is a bad one Mixture preparation and therefore bad combustion what to increased fuel consumption and increased Emissions.

Aus der EP 0067 143 ergibt sich eine Kraftstoffeinspritzdüse für Brennkraftmaschinen mit einem mit einer Düsennadel zusammenwirkenden Dichtkegel und mit vom Bereich des Dichtkegels abgehenden, gleichmäßig über den Umfang verteilten Düsenbohrungen. Diese münden in eine zur Achse der Düsennadel konzentrische Ausnehmung, wodurch eine Erosion am Eingang verhindert werden soll. Bei der bekannten Anordnung sind die Düsenbohrungen gleichmäßig über den Umfang verteilt. Bei in Form einer in eine Richtung weisenden Bohrungsreihe angeordneten Düsenbohrungen ergäben sich ungleiche Längenverhältnisse. From EP 0067 143 a fuel injection nozzle for Internal combustion engines with one with a nozzle needle interacting sealing cone and with from the area of the Sealing cone outgoing, evenly distributed over the circumference Nozzle holes. These open into a to the axis of the nozzle needle concentric recess, causing erosion at the entrance should be prevented. In the known arrangement Nozzle holes evenly distributed over the circumference. At in Form of a unidirectional row of holes arranged nozzle bores would result in uneven aspect ratios.

Hiervon ausgehend ist es daher die Aufgabe der vorliegenden Erfindung, eine Vorrichtung eingangs erwähnter Art mit einfachen und kostengünstigen Mitteln so zu verbessern, dass eine gute Verbrennung und damit ein geringer Brennstoffverbrauch und geringer Schadstoffausstoß erreichbar sind.Based on this, it is therefore the task of the present one Invention, a device of the type mentioned with simple and cost effective means to improve it so that a good one Combustion and thus a low fuel consumption and low pollutant emissions can be achieved.

Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen des Anspruchs 1 gelöst.This object is achieved by the characteristics of Claim 1 solved.

Die erfindungsgemäßen Maßnahmen stellen sicher, dass an allen Düsenbohrungen annähernd gleiche Verhältnisse für einen ungehinderten Eintritt des Brennstoffs erreichbar sind. So lassen sich mit Hilfe der Eingangskammern in vorteilhafter Weise in etwa gleiche Bohrungslängen sämtlicher Düsenbohrungen erreichen. Ebenso lassen sich über dem Umfang der einzelnen Düsenbohrungen sich nicht ändernde Mantellängen erreichen. Die erfindungsgemäßen Maßnahmen führen daher in vorteilhafter Weise insgesamt zu gleichen Längenverhältnissen, was zu einer Vergleichmäßigung der Wandreibungen und Strömungsgeschwindigkeiten und damit insgesamt einen stabilen Einspritzstrahl führt. Insbesondere in Folge der Stabilisierung der Strömung im Bereich der äußeren Düsenbohrungen einer Bohrungsreihe ist sichergestellt, dass durch den Einspritzstrahl vergleichsweise viel Luft mitgerissen wird, was eine gute Gemischaufbereitung und damit eine gute Verbrennung erwarten läßt, was sich in einem geringen Brennstoffverbrauch und einem geringen Schadstoffausstoß sowie einer geringen Verschmutzung des Motors niederschlägt. Mit den erfindungsgemäßen Maßnahmen werden somit die eingangs geschilderten Nachteile vollständig vermieden.The measures according to the invention ensure that at all Nozzle holes almost the same conditions for one unimpeded entry of the fuel can be reached. Let it be yourself with the help of the entrance chambers in an advantageous manner achieve the same bore lengths for all nozzle bores. Likewise, the scope of the individual Nozzle bores reach unchanging jacket lengths. The Measures according to the invention therefore lead in an advantageous manner Way, overall at equal aspect ratios, resulting in a Uniformization of wall friction and flow velocities and thus a stable overall Injection jet leads. Particularly as a result of the stabilization of the Flow in the area of the outer nozzle bores Series of holes ensures that through the injection jet comparatively much air is entrained, which is good Mixture preparation and thus expect good combustion can what is in one low fuel consumption and a low Pollutant emissions and a slight pollution of the engine reflected. With the measures according to the invention thus the disadvantages described above are completely avoided.

Vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen sind in den Unteransprüchen angegeben. So können zweckmäßig jedenfalls den äußeren Düsenbohrungen einer Bohrungsreihe jeweils eine Eingangskammer zugeordnet sein. Im Bereich der äußeren Düsenbohrungen einer Bohrungsreihe läßt sich mit Hilfe der erfindungsgemäßen Eingangskammern der größte Effekt erreichen, da bisher gerade im Bereich der äußeren Düsenbohrungen einer Bohrungsreihe eine höchst instabile Strömung zu befürchten war.Advantageous refinements and practical training of overriding measures are in the subclaims specified. In any case, it can be useful for the outside Nozzle holes in a row of holes each Entrance chamber must be assigned. In the area of the outer Nozzle holes in a row of holes can be created using the entrance chambers according to the invention achieve the greatest effect, because so far one in the area of the outer nozzle bores A very unstable flow was to be feared.

Gemäß einer ersten vorteilhaften Ausführung können die Eingangskammern als im Querschnitt halbkugelförmige Ausnehmungen des Düsenkopfes ausgebildet sein. Die halbkugelförmigen Ausnehmungen ermöglichen in vorteilhafter Weise die Schaffung exakt gleicher Randwinkel über dem ganzen Umfang einer Düsenbohrung. Zweckmäßig sind die halbkugelförmigen Ausnehmungen dabei so angeordnet, daß ihr Mittelpunkt auf der Achse der jeweils zugeordneten Düsenbohrung liegt, so daß diese bezüglich des Mittelpunkts der zugeordneten Eingangskammer zentriert ist.According to a first advantageous embodiment, the Entrance chambers as hemispherical in cross section Recesses of the nozzle head can be formed. The hemispherical recesses allow advantageously Way of creating exactly the same wetting angle over the whole Scope of a nozzle bore. They are useful hemispherical recesses arranged so that you Center point on the axis of the assigned nozzle bore lies, so that this with respect to the center of the assigned Entrance chamber is centered.

Die Ausbildung der Eingangskammern als halbkugelförmige Ausnehmungen des Düsenkopfes stellen zudem sicher, daß auf einfache Weise jeder Düsenbohrung eine entsprechende Eingangskammer zugeordnet sein kann, ohne daß der Düsenkopf hierdurch zu stark geschwächt würde.The formation of the entrance chambers as hemispherical Recesses of the nozzle head also ensure that a simple way to match each nozzle bore Entrance chamber can be assigned without the nozzle head would be weakened too much.

Ein weiterer Vorteil ist darin zu sehen, daß die halbkugelförmigen Ausnehmungen ohne weiteres so angeordnet sein können, daß sich im Bereich zwischen zwei einander benachbarten Ausnehmungen jeweils ein stehenbleibender Steg ergibt, der als Führungssteg für das Schieberelement fungieren kann, wodurch dieses gegen Verschleiß geschützt wird.Another advantage is the fact that the hemispherical Recesses can be arranged so that in the area between two neighboring ones Recesses each result in a standing web, which as Guide bar for the slide element can act, whereby it is protected against wear.

Eine andere vorteilhafte Ausgestaltung der übergeordneten Maßnahmen kann darin bestehen, daß die Eingangskammern als ringsegmentförmige Ausnehmungen des Düsenkopfes ausgebildet sind. Hierbei ist eine besonders kostengünstige Herstellung möglich. Zudem ermöglicht die Ausgestaltung die Erzielung vergleichsweise gut an einen Wert von 90° angepaßte Randwinkel im Übergangsbereich zwischen einer Düsenbohrung und der jeweils zugeordneten Eingangskammer.Another advantageous embodiment of the parent Measures can be that the entrance chambers as annular segment-shaped recesses of the nozzle head are. This is a particularly inexpensive manufacture possible. The design also enables it to be achieved comparatively well adapted to a value of 90 ° contact angle in the transition area between a nozzle bore and the each assigned entrance chamber.

Ein weiterer Vorteil ist darin zu sehen, daß einer von anderen Düsenbohrungen flankierten, mittleren Gruppe von Düsenbohrungen eine gemeinsame Eingangskammer zugeordnet sein kann, ohne daß der Düsenkopf zu sehr geschwächt würde.Another advantage is that one of the others Nozzle holes flanked by the middle group of Nozzle holes assigned a common entrance chamber can be without the nozzle head being weakened too much.

In weiterer Fortbildung der übergeordneten Maßnahmen kann am äußeren Ende der Düsenbohrung jeweils eine vorteilhaft durch einen stufenförmigen Ausstich gebildete, stufenförmige Querschnittserweiterung vorgesehen sein. Dies ergibt in vorteilhafter Weise eine das äußere Ende der Düsenbohrungen umgebende, achsnormale Begrenzungsfläche. Hierdurch ist sichergestellt, daß Störungen des Strahls vermieden werden, wodurch dieser stabilisiert wird, was die Mitnahme von Luft begünstigt. Mit den genannten Maßnahmen werden daher die eingangs bereits erwähnten grundsätzlichen Vorteile der vorliegenden Erfindung noch verstärkt.In further training of the higher-level measures on outer end of the nozzle bore each advantageously through a stepped cut-out, stepped Cross-sectional expansion can be provided. This results in advantageously the outer end of the nozzle bores surrounding, axially normal boundary surface. This is ensures that interference with the beam is avoided, which stabilizes it, which entails the entrainment of air favored. With the measures mentioned, the basic advantages of the present invention further reinforced.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Massnahmen sind in den restlichen Unteransprüchen angegeben und aus der nachstehenden Beispielsbeschreibung anhand der Zeichnung näher entnehmbar.Further advantageous configurations and expedient Further education of the overarching measures are in the remaining subclaims specified and from the Example description below using the drawing removable.

In der nachstehend beschriebenen Zeichnung zeigen:

Figur 1
einen Schnitt durch ein erfindungsgemäßes Einspritzventil eines Zweitakt-Grossdieselmotors,
Figur 2
ein Beispiel mit halbkugelförmigen Eingangskammern anhand eines im Bereich der Düsenbohrungen geführten Horizontalschnitts durch den Düsenkopf eines Einspritzventils eines Zweitakt-Großdieselmotors,
Figur 3
ein Beispiel mit ringsegmentförmigen Eingangskammern in Figur 2 entsprechender Darstellung und
Figur 4
einen Schnitt entlang der Linie IV/IV in Figur 3.
In the drawing described below:
Figure 1
3 shows a section through an injection valve according to the invention of a large two-stroke diesel engine,
Figure 2
1 shows an example with hemispherical inlet chambers on the basis of a horizontal section in the area of the nozzle bores through the nozzle head of an injection valve of a large two-stroke diesel engine,
Figure 3
an example with ring segment-shaped entrance chambers in Figure 2 corresponding representation and
Figure 4
a section along the line IV / IV in Figure 3.

Der grundsätzliche Aufbau und die Wirkungsweise von Zweitakt-Grossdieselmotoren, sind an sich bekannt und bedürfen daher im vorliegenden Zusammenhang keiner näheren Erläuterung mehr. The basic structure and mode of operation of large two-stroke diesel engines, are known per se and therefore need in no further explanation in the present context.

Das der Figur 1 zugrundeliegende Einspritzventil 1 besteht aus einem büchsenförmigen, nach vorne sich verjüngenden Mantelgehäuse 2, das einen mit einer Sackbohrung 3 versehenen Düsenkopf 4 trägt. Dieser stützt sich mit einem rückwärtigen Flansch an einem vorderen Bund des Mantelgehäuses 2 ab. Der Düsenkopf 4 schließt mit seinem rückwärtigen Ende an eine im Mantelgehäuse 2 aufgenommene Führungsbüchse 5 an, die mit einer zur Sackbohrung 3 des Düsenkopfes 4 koaxialen Durchgangsbohrung 6 versehen ist. Diese besitzt eine stufenförmige Verengung, die als Ventilsitz 7 ausgebildet ist, mit dem ein Ventilkörper 8 zusammenwirkt, der von einem in der Führungsbüchse 5 angeordneten Schaft 9 absteht. Der Durchmesser des Ventilkörpers 8 ist kleiner als der Durchmesser des Schafts 9, so daß sich ein den Ventilkörper 8 umgebender, zur Bohrung 6 gehörender Ringraum 10 ergibt.The injection valve 1 on which FIG. 1 is based consists of a box-shaped, tapering towards the front Jacket housing 2, which is provided with a blind hole 3 Nozzle head 4 carries. This is supported by a rear one Flange on a front collar of the casing 2. The Nozzle head 4 closes with its rear end to one in Shell housing 2 received guide sleeve 5, which with one to the blind bore 3 of the nozzle head 4 coaxial Through hole 6 is provided. This has one step-shaped constriction, which is designed as a valve seat 7, with which cooperates a valve body 8, the one in the Guide sleeve 5 arranged shaft 9 protrudes. The The diameter of the valve body 8 is smaller than the diameter of the shaft 9, so that a surrounding the valve body 8 for Bore 6 belonging annulus 10 results.

Der Schaft 9 ist mit einer zentralen, an eine Brennstoffleitung angeschlossene, mit Brennstoff beaufschlagbaren Bohrung 11 versehen, die über Stichbohrungen 12 mit dem Ringraum 10 verbunden ist. Der Ventilkörper 8 wird durch die Wirkung einer hier nicht näher dargestellten, mit dem Schaft 9 zusammenwirkenden Rückstellfeder an den Dichtsitz 7 angedrückt. Bei einer entsprechenden Druckerhöhung des im Ringraum 10 anstehenden Brennstoffs wird der Ventilkörper 8 vom zugeordneten Dichtsitz 7 abgehoben, wodurch sich eine Verbindung des mit Brennstoff beaufschlagbaren Bereichs mit der Sackbohrung 3 des Düsenkopfes 4 ergibt. The shaft 9 is connected to a central fuel line connected bore 11 which can be filled with fuel provided with the annular space 10 via tap holes 12 connected is. The valve body 8 is by the action of a not shown here, with the shaft 9 cooperating return spring to the sealing seat 7 pressed. With a corresponding pressure increase in the Annulus 10 pending fuel, the valve body 8 from assigned sealing seat 7 is lifted, which is a Connection of the area to which fuel can be applied with the Blind hole 3 of the nozzle head 4 results.

Der Düsenkopf 4 ist in seinem unteren Bereich mit mehreren, etwa auf gleicher Höhe nebeneinander angeordneten, quer zur Achse der Sackbohrung 3 verlaufenden Düsenbohrungen 13 versehen, über welche der Brennstoff in einen zugeordneten Brennraum einspritzbar ist. Um sicherzustellen, daß nach Schließen der vom Ventilkörper 8 kontrollierten Passage kein Brennstoff mehr aus den Düsenbohrungen 13 austreten kann, ist in der Sackbohrung 3 ein über einen Stab 14 mit dem Ventilkörper 8 verbundenes, ringförmiges Schieberelement 15 vorgesehen, dessen untere Kante eine die Düsenbohrungen 13 überfahrende Steuerkante bildet, die so angeordnet ist, daß die Düsenbohrungen 13 geöffnet sind, wenn der Ventilkörper 8 vom zugeordneten Ventilsitz 7 abgehoben ist und daß die Düsenbohrungen 13 geschlossen sind, wenn der Ventilkörper 8 am Ventilsitz 7 anliegt. Diese Position liegt der Figur 1 zugrunde.The nozzle head 4 is in its lower area with several, approximately arranged at the same height next to each other, transverse to the axis of the Blind bore 3 extending nozzle holes 13 provided about which the fuel into an associated combustion chamber is injectable. To ensure that after closing the from Valve body 8 controlled passage no more fuel the nozzle bores 13 can exit is in the blind hole 3 a connected to the valve body 8 via a rod 14, annular slide element 15 is provided, the lower edge forms a control edge passing over the nozzle bores 13 which is arranged so that the nozzle bores 13 are open when the valve body 8 is lifted off the associated valve seat 7 and that the nozzle bores 13 are closed when the Valve body 8 rests on valve seat 7. This position is the figure 1 underlying.

Um die nötige Brennstoffmenge einspritzen zu können, sind jeweils mehrere, in Richtung der Achse der Sackbohrung 3 etwa auf gleicher Höhe angeordnete, seitlich gegeneinander versetzte Düsenbohrungen 13 vorgesehen, wie die Figuren 2 und 3 anschaulich erkennen lassen. Die Düsenbohrungen 13 können achsnormal angeordnet oder, wie in Figur 4, nach außen leicht geneigt sein. Da der von den Düsenbohrungen 13 gemeinsam erzeugte Einspritzstrahl nicht zu stark divergieren soll, sind die Düsenbohrungen 13 bezüglich der Achse der Sackbohrung 3 nicht radial angeordnet, sondern gegenüber einer Radialen zur Haupteinspritzrichtung hin gewandt, so daß sich ein kleinerer Divergierungs- bzw. Streuungswinkel ergibt. In order to be able to inject the necessary amount of fuel, are each several, approximately in the direction of the axis of the blind bore 3 arranged at the same height, laterally offset from each other Nozzle bores 13 are provided, as in FIGS. 2 and 3 can be clearly seen. The nozzle bores 13 can Axially normal or, as in Figure 4, slightly outward be inclined. Because of the nozzle bores 13 in common generated injection jet should not diverge too much, are the No nozzle bores 13 with respect to the axis of the blind bore 3 arranged radially, but opposite to a radial Main injection direction turned so that there is a smaller Diverging or scattering angle results.

Sofern die Düsenbohrungen 13 ohne Querschnittsveränderung bis zur Sackbohrung 3 durchgehen würden, ergäben sich sehr stark voneinander abweichende Zuströmverhältnisse zu den einzelnen Düsenbohrungen 13 und auch innerhalb einzelner Düsenbohrungen 13. Insbesondere die beiden äußeren Düsenbohrungen 13 der hier vorgesehenen, vier nebeneinander angeordnete Düsenbohrungen 13 umfassenden Bohrungsreihe wären wesentlich länger als die inneren Düsenbohrungen 13, wobei sich im Bereich dieser äußeren Düsenbohrungen 13 über deren Umfang ebenfalls unterschiedliche Längen ergäben. Diese Verhältnisse würden zu einer schlechten Verbrennung und damit zu einem hohen Brennstoffverbrauch und zu hohem Schadstoffausstoß etc. führen. Um dies zu vermeiden, sind den Düsenbohrungen 13 von der Sackbohrung 3 ausgehende Eingangskammern 16 zugeordnet, deren lichte Weite größer als der Durchmesser der Düsenbohrungen 13 ist.If the nozzle bores 13 up to without changing the cross section would go to blind hole 3, would be very strong divergent inflow ratios to the individual Nozzle bores 13 and also within individual ones Nozzle holes 13. Especially the two outer ones Nozzle bores 13 of the four provided next to each other arranged nozzle holes 13 comprising row of holes would be significantly longer than the inner nozzle bores 13, whereby in the area of these outer nozzle bores 13 whose scope would also result in different lengths. This Conditions would lead to bad combustion and thus to high fuel consumption and too high Lead to pollutant emissions etc. To avoid this, the Nozzle bores 13 starting from the blind bore 3 Assigned input chambers 16, the clear width larger than that Diameter of the nozzle bores 13 is.

Bei der Ausführung gemäß Figur 2 sind zur Bildung der oben erwähnten Eingangskammern von der Sackbohrung 3 ausgehende, halbkugelförmige Ausnehmungen 17 des Düsenkopfes 4 vorgesehen. Die halbkugelförmigen Ausnehmungen 17 können einfach durch elektrolytische Materialabtragung mit Hilfe einer nach dem EDM (electrical discharge machining)-Verfahren arbeitenden Vorrichtung hergestellt werden. Die Düsenbohrungen 13 selbst werden einfach mit Hilfe eines Laserstrahls gebohrt.In the embodiment according to FIG. 2, the above are used to form mentioned entrance chambers starting from the blind bore 3, hemispherical recesses 17 of the nozzle head 4 intended. The hemispherical recesses 17 can simply by electrolytic material removal with the help of a according to the EDM (electrical discharge machining) process working device are manufactured. The nozzle bores 13 themselves are simply drilled using a laser beam.

Die jeweils eine Eingangskammer bildenden, halbkugelförmigen Ausnehmungen 17 sind dabei so angeordnet, daß ihr Mittelpunkt jeweils auf der Achse der zugeordneten Düsenbohrung 13 liegt. Auf diese Weise ergibt sich eine Zentrierung der Düsenbohrungen 13 bezüglich der zugeordneten Eingangskammer. Diese Zentrierung stellt sicher, daß sich im Bereich des Übergangs zwischen Eingangskammer und Düsenbohrung 13 auf dem ganzen Bohrungsumfang ein in etwa gleichbleibender Randwinkel ergibt, wie in Figur 2 bei 18 angedeutet ist.The hemispherical, each forming an entrance chamber Recesses 17 are arranged so that their center each lies on the axis of the associated nozzle bore 13. On this results in centering of the nozzle bores 13 with respect to the assigned entrance chamber. This centering ensures that in the area of the transition between Entry chamber and nozzle bore 13 all over Hole circumference results in a roughly constant contact angle, as indicated in Figure 2 at 18.

Die einander benachbarten Düsenbohrungen 13 jeweils zugeordneten, halbkugelförmigen Ausnehmungen 17 sind so dimensioniert, daß zwischen zwei einander benachbarten halbkugelförmigen Ausnehmungen 17 ein Steg 19 stehen bleibt, der als Führungssteg für das ringförmige Schieberelement 15 fungieren kann, so daß dieses auch im Bereich der Eingangskammern zuverlässig abgestützt ist, was sich vorteilhaft auf die Erzielung einer langen Lebensdauer auswirkt.The adjacent nozzle bores 13 each assigned hemispherical recesses 17 are so dimensioned that between two adjacent hemispherical recesses 17 a web 19 remains, which acts as a guide bar for the annular slide element 15 can act so that this also in the area of Entrance chambers are reliably supported, which is advantageous affects the achievement of a long lifespan.

In besonderen Fällen genügt es, wenn nur den beiden äußeren Düsenbohrungen 13 eine Eingangskammer 16 zugeordnet ist. Bei dem der Figur 2 zugrundeliegenden, bevorzugten Ausführungsbeispiel sind allen Düsenbohrungen 13 durch halbkugelförmige Ausnehmungen 17 gebildete Eingangskammern zugeordnet, was besonders gute Verbrennungsverhältnisse und damit einen besonders günstigen Brennstoffverbrauch erwarten läßt.In special cases it is sufficient if only the two outer ones Nozzle bores 13 are assigned to an input chamber 16. at that on which FIG. 2 is based, preferred Embodiment are all nozzle holes 13 through hemispherical recesses 17 formed entrance chambers assigned what particularly good combustion conditions and thus expect particularly low fuel consumption leaves.

Bei dem der Figur 3 zugrundeliegenden Ausführungsbeispiel sind den Düsenbohrungen 13 als ringsegmentförmige Ausnehmungen 20 des Düsenkopfes 4 ausgebildete Eingangskammern zugeordnet. Die Radien der ringsegmentförmigen Ausnehmungen 20 sind dabei so an die jeweils zugeordnete Düsenbohrung 13 bzw. Düsenbohrungen 13 angepaßt, daß sich im Übergangsbereich zwischen Eingangskammer und Düsenbohrung 13 ein möglichst nahe an 90° angenäherter Randwinkel ergibt, wie in Figur 3 bei 21 angedeutet ist.In the exemplary embodiment on which FIG. 3 is based the nozzle bores 13 as ring segment-shaped recesses 20 of the nozzle head 4 assigned input chambers. The radii of the ring segment-shaped recesses 20 are included so to the respectively assigned nozzle bore 13 or Nozzle holes 13 adapted that in the transition area between the input chamber and nozzle bore 13 as possible edge angle approximated to 90 ° results, as in FIG. 3 at 21 is indicated.

Es wäre denkbar, jeder Düsenbohrung 13 eine eigene, durch ein Ringsegment 20 gebildete Eingangskammer zuzuordnen. Im dargestellten Beispiel ist den beiden mittleren Düsenbohrungen 13 eine gemeinsame, durch ein Ringsegment 20 gebildete Eingangskammer zugeordnet. Dieses Ringsegment 20 entspricht einem Abschnitt einer zur Achse der Sackbohrung 3 des Düsenkopfes 4 koaxialen Ringnut und ist durch die benachbarten, den beiden äußeren Düsenbohrungen 13 zugeordneten Ringsegmente 20, die einen kleineren Radius aufweisen, begrenzt.It would be conceivable for each nozzle bore 13 to have its own one To assign ring segment 20 formed entrance chamber. in the The example shown is the two middle nozzle bores 13 a common, formed by a ring segment 20 Assigned to the entrance chamber. This ring segment 20 corresponds a section of the axis of the blind hole 3 of the Nozzle head 4 coaxial ring groove and is characterized by the neighboring, assigned to the two outer nozzle bores 13 Ring segments 20, which have a smaller radius, limited.

Diese äußeren Ringsegmente 20 sind so angeordnet, daß sich ihr Mittelpunkt auf der Achse der jeweils zugeordneten Düsenbohrung 13 befindet, so daß diese bezüglich der zugeordneten Eingangskammer zentriert ist, was zu einer Vergleichmäßigung der Zuströmverhältnisse über dem ganzen Bohrungsumfang beiträgt. Der Mittelpunkt des den beiden mittleren Düsenbohrungen 13 zugeordneten Ringsegments 20 befindet sich im Bereich zwischen den beiden Achsen der beiden zugeordneten Düsenbohrungen 13.These outer ring segments 20 are arranged so that you Center point on the axis of the assigned nozzle bore 13 is located, so that this with respect to the associated Entrance chamber is centered, resulting in an equalization of the Inflow conditions over the entire circumference of the bore contributes. The center of the two middle nozzle bores 13th assigned ring segment 20 is in the area between the two axes of the two associated nozzle bores 13.

Im Bereich des äußeren Endes der Düsenbohrungen 13 ist bei dem den Figuren 3 und 4 zugrundeliegenden Beispiel ein einen größeren Durchmesser als die Düsenbohrungen 13 aufweisender Ausstich 22 vorgesehen. Dieser führt zu einer stufenförmigen Querschnittserweiterung mit einer zur jeweiligen Bohrungsachse normalen, das Bohrungsende umgebenden Ringfläche 23. Der Ausstich 22 stellt sicher, daß der aus der Düsenbohrung 13 austretende Strahl keinerlei Störung erfährt.In the area of the outer end of the nozzle bores 13 is in the FIGS. 3 and 4 are based on an example larger diameter than the nozzle bores 13 Cutout 22 provided. This leads to a step-like Cross-sectional expansion with one to the respective bore axis normal ring surface surrounding the end of the bore 23. The Cutout 22 ensures that the nozzle bore 13th emerging beam experiences no interference.

Selbstverständlich wäre es denkbar, auch bei der Ausführung gemäß Figur 2 Ausstiche oben erwähnter Art vorzusehen.Of course, it would also be conceivable, also in the execution to provide cutouts of the type mentioned above according to FIG.

Es wäre auch ohne weiteres denkbar, einem Teil der Düsenbohrungen 13 durch halbkugelförmige Ausnehmungen 17 gebildete und einem anderen Teil durch eine oder mehrere ringsegmentförmige Ausnehmungen 20 gebildete Eingangskammern zuzuordnen, etwa derart, daß den äußeren Düsenbohrungen 13 durch halbkugelförmige Ausnehmungen 17 gebildete und den inneren Düsenbohrungen 13 eine gemeinsame, durch eine ringsegmentförmige Ausnehmung 20 gebildete Eingangskammer zugeordnet sind.It would also be easy conceivable through part of the nozzle bores 13 hemispherical recesses 17 formed and another Part by one or more ring segment-shaped recesses To assign 20 input chambers formed, such that the outer nozzle bores 13 through hemispherical Recesses 17 formed and the inner nozzle bores 13th a common, through a ring segment-shaped recess 20th formed entrance chamber are assigned.

Claims (14)

  1. A fuel injection device for internal combustion engines, in particular large two-stroke diesel engines, comprising a nozzle head (4) protruding into an associated combustion chamber, arranged eccentrically in relation to the axis of the combustion chamber; said nozzle head (4) comprising a blind borehole (3) through which fuel can be admitted, with several nozzle bores (13) emanating from said blind borehole (3); said nozzle bores (13) being able to be controlled up or down by a slide element (15) arranged in the blind borehole (3); said slide element (15) being preferably axially slidable as a result of the fuel pressure, against the action of a return device; with said nozzle bores (13), for generating a mutual injection jet, being arranged in a borehole row facing the circumferential area of the blind borehole (3), in relation to the axis of the blind borehole (3) arranged approximately at the same height; with at least the axes of the outer nozzle bores (13) of the row of boreholes being inclined inward in a radial arrangement in relation to the axis of the blind borehole (3), so as to achieve an acute diverging angle of the injection jet, characterised in that at least part of the nozzle bores (13) are associated with inlet chambers (16) emanating from the blind borehole (3), with the inside diameter of said inlet chambers (16) being larger than the diameter of the nozzle bores (13) and with said inlet chambers (16) being configured in such a way that all nozzle bores (13) of the row of boreholes are at least similar in length.
  2. A fuel injection device according to claim 1, characterised in that the inlet chambers (16) are configured in such a way that the case length of the nozzle bores (13) is essentially equal across their circumference.
  3. A fuel injection device according to claim 1 or 2, characterised in that all nozzle bores are essentially identical in length.
  4. A fuel injection device according to one of the preceding claims, characterised in that an entry chamber (16) is associated with at least the outer nozzle bores (13) of a row of nozzle bores.
  5. A fuel injection device according to one of the preceding claims, characterised in that the entry chambers are at least partly shaped as recesses (17) of approximately hemispherical cross-sectional shape, in the nozzle head (4).
  6. A fuel injection device according to claim 5, characterised in that an entry chamber shaped as a hemispherical recess (17) is associated with each nozzle bore (13).
  7. A fuel injection device according to one of the preceding claims 5 or 6, characterised in that the centre of each hemispherical recess (17) forming an entry chamber is located on the axis of the respectively associated nozzle bore (13).
  8. A fuel injection device according to one of the preceding claims 5 to 7, characterised in that a guide stay (19) is provided between adjacent entry chambers formed by hemispherical recesses (17).
  9. A fuel injection device according to one of the preceding claims, characterised in that the entry chambers are at least in part configured as ring-segment shaped recesses (20) of the nozzle head (4).
  10. A fuel injection device according to claim 9, characterised in that a middle group of nozzle bores (13) flanked by other nozzle bores (13) is associated with a common entry chamber formed by a ring-segment shaped recess (20).
  11. A fuel injection device according to one of claims 9 or 10, characterised in that the centre of the ring-segment shaped recess (20) forming an entry chamber associated with a nozzle bore (13) is aligned on the axis of the respectively associated nozzle bore (13).
  12. A fuel injection device according to one of the preceding claims, characterised in that the walls of the nozzle bores (13) and the associated entry chambers encompass an angle of at least approximately 90°.
  13. A fuel injection device according to one of the preceding claims, characterised in that at the outer end of the nozzle bores (13) a step-shaped cross-sectional enlargement formed by a punched-out part (22) is provided.
  14. A fuel injection device according to claim 13, characterised in that the punched-out part (22) comprises an inner delimitation surface (23) arranged along the normal axis of the associated nozzle bore (13).
EP99914552A 1998-04-09 1999-03-27 Fuel injection device Expired - Lifetime EP0988449B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19815918 1998-04-09
DE19815918A DE19815918A1 (en) 1998-04-09 1998-04-09 Fuel injector
PCT/EP1999/002117 WO1999053196A1 (en) 1998-04-09 1999-03-27 Fuel injection device

Publications (2)

Publication Number Publication Date
EP0988449A1 EP0988449A1 (en) 2000-03-29
EP0988449B1 true EP0988449B1 (en) 2003-07-16

Family

ID=7864095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99914552A Expired - Lifetime EP0988449B1 (en) 1998-04-09 1999-03-27 Fuel injection device

Country Status (9)

Country Link
EP (1) EP0988449B1 (en)
JP (1) JP3308551B2 (en)
KR (1) KR100361442B1 (en)
CN (1) CN1093226C (en)
AU (1) AU3332799A (en)
DE (2) DE19815918A1 (en)
PL (1) PL202429B1 (en)
RU (1) RU2175728C2 (en)
WO (1) WO1999053196A1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10050704A1 (en) * 2000-10-13 2003-02-20 Siemens Ag Fuel injection valve has stepped transition region from jet chamber to each injection boring with at least one indentation
DE10132449A1 (en) * 2001-07-04 2003-01-23 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10307931A1 (en) 2003-02-25 2004-10-28 Robert Bosch Gmbh Fuel injector
DE10330256A1 (en) * 2003-07-04 2005-01-20 Robert Bosch Gmbh Fuel injection valve for internal combustion engine, comprises bulges arranged such that the two connecting lines of points of largest distance to the center form an angle of less than 180 degrees with the mirror plane
DE10354467A1 (en) * 2003-11-21 2005-06-09 Robert Bosch Gmbh Fuel injector
WO2008071187A1 (en) * 2006-12-15 2008-06-19 Man Diesel A/S A fuel injector for an internal combustion engine
CN101558231B (en) * 2006-12-15 2012-01-04 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 A fuel injector for an internal combustion engine
KR20090012056A (en) * 2007-07-27 2009-02-02 베르트질레 슈바이츠 악티엔게젤샤프트 An injection nozzle for fuel
DE502008001427D1 (en) * 2007-08-31 2010-11-11 Waertsilae Nsd Schweiz Ag Injection nozzle for injecting fuel
JP5071090B2 (en) 2007-12-17 2012-11-14 株式会社Ihi Diesel engine fuel injection method and diesel engine
DK2239451T3 (en) * 2009-03-30 2011-10-10 Waertsilae Switzerland Ltd Fuel injection device for internal combustion engines
DK2386745T3 (en) * 2010-05-11 2013-03-04 Waertsilae Switzerland Ltd Fuel injection device for internal combustion engines
DK177456B1 (en) * 2011-06-27 2013-06-17 Man Diesel & Turbo Deutschland A fuel valve for large turbocharged two stroke diesel engines
DE102012209326A1 (en) * 2012-06-01 2013-12-05 Robert Bosch Gmbh Fuel injector
DK3015699T3 (en) 2014-10-31 2019-03-11 Winterthur Gas & Diesel Ag Gas supply system with a control system and cylinder for a piston combustion engine, piston combustion engine and method of operation of a piston combustion engine
EP3015679B1 (en) 2014-10-31 2018-12-05 Winterthur Gas & Diesel AG Cylinder for a reciprocating piston engine, reciprocating combustion engine, and method for operating same
DK178692B1 (en) 2015-04-22 2016-11-21 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland A fuel valve for a large two-stroke self-igniting internal combustion engine
DK3147477T3 (en) 2015-09-23 2019-01-21 Winterthur Gas & Diesel Ag Gas supply system and cylinder liner for a piston combustion engine, piston combustion engine and method of operation of a piston combustion engine
EP3376019B1 (en) * 2015-11-10 2023-01-04 Nissan Motor Co., Ltd. Method for controlling internal combustion engine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067143A1 (en) * 1981-06-10 1982-12-15 Friedmann & Maier Aktiengesellschaft Fuel injection nozzle
DE3306078A1 (en) * 1983-02-22 1984-08-23 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES
JPS59152176U (en) * 1983-03-31 1984-10-12 三菱自動車工業株式会社 fuel injection nozzle
CH665453A5 (en) * 1985-01-11 1988-05-13 Sulzer Ag CYLINDER COVER FOR A PISTON INTERNAL COMBUSTION ENGINE.
GB8817774D0 (en) * 1988-07-26 1988-09-01 Lucas Ind Plc Fuel injectors for i c engines
JPH0267459A (en) * 1988-08-31 1990-03-07 Nippon Denso Co Ltd Fuel injection nozzle
JP2819702B2 (en) * 1989-12-12 1998-11-05 株式会社デンソー Fuel injection valve
US5026462A (en) * 1990-03-06 1991-06-25 Ail Corporation Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles
DK167502B1 (en) * 1991-10-04 1993-11-08 Man B & W Diesel Gmbh FUEL ENGINE FOR COMBUSTION ENGINES
EP0809017A1 (en) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Two-stage fuel injection nozzel for internal combustion engine

Also Published As

Publication number Publication date
KR100361442B1 (en) 2002-11-21
RU2175728C2 (en) 2001-11-10
DE59906287D1 (en) 2003-08-21
PL337334A1 (en) 2000-08-14
AU3332799A (en) 1999-11-01
DE19815918A1 (en) 1999-10-21
JP2000516687A (en) 2000-12-12
CN1263584A (en) 2000-08-16
JP3308551B2 (en) 2002-07-29
CN1093226C (en) 2002-10-23
EP0988449A1 (en) 2000-03-29
WO1999053196A1 (en) 1999-10-21
PL202429B1 (en) 2009-06-30
KR20010013569A (en) 2001-02-26

Similar Documents

Publication Publication Date Title
EP0988449B1 (en) Fuel injection device
DE4039520B4 (en) Fuel injection valve
EP0918927B1 (en) Injection valve, particularly for direct injection of fuel into the combustion chamber of an internal combustion engine
DE19518950B4 (en) fuel Injector
DE2460111A1 (en) INJECTION VALVE
DE3606246A1 (en) Fuel injection nozzle for internal combustion engines
DE4228364C2 (en) Fuel injector
EP1546547B1 (en) Fuel injection valve for internal combustion engines
DE10210976A1 (en) Fuel injection valve for internal combustion engine has injection jets converging from at least one outer and one inner injection channel
EP1163442A1 (en) Fuel injection nozzle
EP0775869A2 (en) Premix burner
DE19623713B4 (en) Injection valve, in particular for the direct injection of fuel into a combustion chamber of an internal combustion engine
DE102005034879B4 (en) Nozzle assembly for an injection valve
EP1180214A1 (en) Axial piston refrigerant compressor
DE10156657A1 (en) Dual fuel injector
EP0413173B1 (en) Fuel injection nozzle for internal combustion engines
EP3014104B1 (en) Nozzle assembly for a fuel injector, and fuel injector
WO2012084515A1 (en) Nozzle body comprising an injection hole having at least two inlet openings
DE19843912B4 (en) fuel Injector
WO2003093669A1 (en) Fuel injection valve for internal combustion engines
DE1945720C3 (en) Internal combustion engine with direct current purging and opposed piston
DE2753266A1 (en) PISTON INTERNAL ENGINE
DE7737139U1 (en) DEVICE FOR REMOVING AIR FROM LIQUID PIPES, IN PARTICULAR WITH A BURNER NOZZLE
EP0018354B1 (en) Injection pump for internal-combustion engines
EP0444256B1 (en) Fuel injection device for injection-type internal combustion engines

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: 19991126

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FI FR GB IT LI NL

17Q First examination report despatched

Effective date: 20020729

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FI FR GB IT LI NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BJERREGAARD, HENRIK

Inventor name: FLARUP, JOHANNES

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59906287

Country of ref document: DE

Date of ref document: 20030821

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031110

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20040419

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

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

Ref country code: FI

Payment date: 20180322

Year of fee payment: 20

Ref country code: CH

Payment date: 20180321

Year of fee payment: 20

Ref country code: DE

Payment date: 20180322

Year of fee payment: 20

Ref country code: NL

Payment date: 20180321

Year of fee payment: 20

Ref country code: GB

Payment date: 20180321

Year of fee payment: 20

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

Ref country code: FR

Payment date: 20180323

Year of fee payment: 20

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

Ref country code: IT

Payment date: 20180327

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59906287

Country of ref document: DE

Ref country code: NL

Ref legal event code: MK

Effective date: 20190326

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20190326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20190326