EP0894194B1 - Injection device - Google Patents
Injection device Download PDFInfo
- Publication number
- EP0894194B1 EP0894194B1 EP97908235A EP97908235A EP0894194B1 EP 0894194 B1 EP0894194 B1 EP 0894194B1 EP 97908235 A EP97908235 A EP 97908235A EP 97908235 A EP97908235 A EP 97908235A EP 0894194 B1 EP0894194 B1 EP 0894194B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- nozzle
- nozzle holder
- pressure channel
- designed
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
-
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Definitions
- the invention relates to an injection device for Diesel engines with a nozzle holder, its pressure channel on the one hand with the injection pump, on the other hand is connected to the nozzle, the nozzle holder opposite one the nozzle needle in the longitudinal direction displaceably receiving nozzle body by means of a
- the washer is supported sealingly. It supports a deformable metal hollow cylindrical Sealing body with one end against a sealing surface and deforms with increasing tightening of the Nozzle body with the nozzle clamping nut connecting the nozzle holder increasingly against his seat.
- the present invention underlying task in sealing the Pressure channel on the one hand and the interior of Nozzle body and nozzle holder against one Leakage of fuel through the thread of the nozzle clamping nut to achieve which is with less Realize effort.
- the sealing body as a sealing cone with corresponding to the conical seat in the nozzle holder is conical outer shape and that the Counter sealing surface on which the sealing cone is located supported by the top of the washer is formed.
- the subtask is solved by the sealing cone the pressure channel on the high pressure side to the washer is sealingly connected, without it being a finish the facing end of the nozzle holder requirement.
- the deformability of the sealing cone is thereby promoted that the sealing cone in the axial direction is shorter than the seat in which it is accommodated is.
- the sealing body as a sealing ring with two outside formed opposite conical sections is, with a section corresponding to the conical Seat in the nozzle holder, the other section accordingly a flared mouth of the pressure channel bore the washer is formed and the counter sealing surface through the mouth of the Pressure channel bore of the washer is formed.
- a sealing ring with two conical The sealing effect achieved is special for sections good and lasting.
- the washer through a Sealing tube, which through a support hole of the Is inserted between the washer, so to speak is bridged; i.e. here the high pressure side takes place Sealing directly between each other facing mouths of the pressure channel, on the one hand in Nozzle holder, on the other hand in the nozzle body.
- the injection device comprises a nozzle holder 1 with a pressure channel 2, in which is the fuel in the direction of arrow P1 of fed to the injection pump, not shown is, and a nozzle body 3, which also is provided with a pressure channel 4, which via a high-pressure connection to be described in more detail continues the pressure channel 2 of the nozzle holder 1.
- a pressure channel 2 of the nozzle holder 1 in which is the fuel in the direction of arrow P1 of fed to the injection pump, not shown is, and a nozzle body 3, which also is provided with a pressure channel 4, which via a high-pressure connection to be described in more detail continues the pressure channel 2 of the nozzle holder 1.
- in the Nozzle body 3 sits in a central bore Nozzle needle 5, whose inner needle end 6 is spherical is.
- the needle end 6 of the nozzle needle 5 is in Biased towards the nozzle by means of a compression spring 8, which are arranged in a central bore 7 of the nozzle holder 1 is.
- Nozzle body 3 and nozzle holder 1 are by means of a Nozzle clamping nut 10 clamped together, which means an internal thread 11 to an external thread 12 of the Nozzle holder 1 is screwed on.
- the high pressure connection between nozzle holder 1 and Nozzle body 3 is produced by means of a Washer 13, the two opposite End faces finely machined by hardening, grinding and lapping are. Through a central bore 14 The intermediate disk 13 extends through the needle end 6.
- the nozzle clamping nut 10 is not yet fully tightened so that between the top 15 of the intermediate disc 13 and the associated end face 16 of the nozzle holder 1, a gap 17 is formed is.
- This gap 17 is bridged by a sealing cone 18 made of a steel alloy with limited deformable properties, for example from free-cutting steel.
- the sealing cone 18 has a to the washer 13 widening conical surface, with which he fits into a corresponding conical seat 19 in the mouth area of the pressure channel 2 of the nozzle holder 1 protrudes.
- FIG. 4 and 5 each show a variant of the high pressure side seal in one Enlarged section according to FIG. 2.
- the sealing cone 18 is replaced by a sealing ring 22, which essentially consists of two outside opposite conical sections 26, 27, whose conical surfaces are at the respective end of the Taper the sealing rings 22.
- the top Section 26 as described for FIG. 2 in the lower End of the pressure channel 2 is added, the lower section 27 in a correspondingly conical widened mouth 23 of the pressure channel bore 2a Intermediate disc 13 on the top 15 thereof.
- a sealing tube 25 is used there, which like the sealing ring 22 (Fig. 4) two conical Has sections 26, 27 at both ends, the on a hollow cylindrical middle section 24 are attached, which of a support bore 29 Intermediate disc 13 is closely embraced. While the top Section 26 as described for FIG. 2 in the conical Seat 19 of the pressure channel 2 is added, the occurs lower section 27 in a correspondingly conical widened mouth 28 of the pressure channel 4 of the Nozzle body 3 a.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Percussion Or Vibration Massage (AREA)
- Window Of Vehicle (AREA)
- Polarising Elements (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Glass Compositions (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
Die Erfindung betrifft eine Einspritzvorrichtung für Dieselmotoren mit einem Düsenhalter, dessen Druckkanal einerseits mit der Einspritzpumpe, andererseits mit der Düse verbunden ist, wobei der Düsenhalter gegenüber einem die Düsennadel in Längsrichtung verschieblich aufnehmenden Düsenkörper mittels einer Zwischenscheibe dichtend abgestützt ist. Dabei stützt sich ein verformbarer metallener hohlzylindrischer Dichtkörper mit einem Ende gegen eine Dichtfläche ab und verformt sich mit zunehmendem Anziehen der den Düsenkörper mit dem Düsenhalter verbindenden Düsenspannmutter zunehmend gegen seinen Sitz.The invention relates to an injection device for Diesel engines with a nozzle holder, its pressure channel on the one hand with the injection pump, on the other hand is connected to the nozzle, the nozzle holder opposite one the nozzle needle in the longitudinal direction displaceably receiving nozzle body by means of a The washer is supported sealingly. It supports a deformable metal hollow cylindrical Sealing body with one end against a sealing surface and deforms with increasing tightening of the Nozzle body with the nozzle clamping nut connecting the nozzle holder increasingly against his seat.
Bei derartigen Einspritzvorrichtungen besteht die Notwendigkeit, den Druckkanal im Übergangsbereich zwischen Düsenhalter und Düsenkörper abzudichten, so daß ein Austreten von Kraftstoff in den Federraum und durch das Gewinde der Düsenspannmutter zuverlässig vermieden wird. Bei bekannten Ausführungsformen wird dies dadurch erreicht, daß die einander zugekehrten Stirnseiten des Düsenhalters und des Düsenkörpers sowie beide Stirnflächen einer zwischen Düsenhalter und Düsenkörper angeordneten Zwischenscheibe jeweils eine feinbearbeitete Oberfläche aufweisen, welche durch aufwendige Bearbeitungsverfahren gehärtet, plangeschliffen und geläppt ist. Der Druckkanal im Düsenhalter grenzt dabei an eine entsprechende Bohrung in der Zwischenscheibe, deren Bohrung wiederum an einen entsprechenden Druckkanal im Düsenkörper an, welcher zur Düse weiterführt. Durch die exakt planparallel geläppten Oberflächen auf beiden Seiten der Zwischenscheibe sowie auf den angrenzenden Stirnseiten von Düsenhalter und Düsenkörper wird eine zuverlässige Abdichtung erzielt, wobei allerdings ein erheblicher Oberflächenbearbeitungsaufwand in Kauf zu nehmen ist. Eine derartige Einspritzvorrichtung ist in der JP-PS 6-66222 beschrieben.In such injectors there is Need the pressure channel in the transition area to seal between the nozzle holder and the nozzle body, so that fuel leakage into the spring chamber and reliable due to the thread of the nozzle clamping nut is avoided. In known embodiments this is achieved by the fact that those facing each other End faces of the nozzle holder and the nozzle body and both end faces one between the nozzle holder and nozzle body arranged washer each have a finely machined surface, which hardened by complex machining processes, is ground and lapped. The pressure channel in the Nozzle holder borders on a corresponding one Hole in the washer, its hole again to a corresponding pressure channel in the nozzle body which continues to the nozzle. Through the Lapped surfaces exactly plane-parallel on both Sides of the washer as well as on the adjacent ones The end faces of the nozzle holder and nozzle body become one achieved reliable sealing, although a considerable surface processing effort in purchase too take is. Such an injector is in JP-PS 6-66222.
Demgegenüber besteht die der vorliegenden Erfindung zugrundeliegende Aufgabe darin, eine Abdichtung des Druckkanals einerseits sowie des Innenraums von Düsenkörper und Düsenhalter andererseits gegen einen Austritt von Kraftstoff durch das Gewinde der Düsenspannmutter zu erzielen, welche sich mit geringerem Aufwand verwirklichen läßt.In contrast, the present invention underlying task in sealing the Pressure channel on the one hand and the interior of Nozzle body and nozzle holder against one Leakage of fuel through the thread of the nozzle clamping nut to achieve which is with less Realize effort.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale
des Anspruchs 1 gelöst. Obwohl die Restfläche von der
zugeordneten Oberseite der Zwischenscheibe entsprechend
abgehoben ist, da die Restfläche mit der Oberseite
einen Winkel von wenigen Winkelgraden
einschließt, sorgt der Dichtkörper für einen dichtenden
Anschluß des Druckkanals im Düsenhalter mit der
Zwischenscheibe bzw. dem Düsenkörper, wobei sich
durch die konischen Dichtflächen ein Selbstzentrieren
des Dichtkörpers ergibt und damit gewährleistet ist,
daß dieser auch unter Hochdruckbedingungen dichtend
abschließt. Auf diese Weise können Spitzendrücke bis
zu 1000 bar beherrscht werden. Des weiteren erübrigen
sich zusätzliche Dichtungsmaßnahmen zur Abdichtung
des Nadelschließfederrahmens aufgrund der konzentrischen
Dichtkante.This object is achieved by the features
of
Nach einer ersten bevorzugten Ausführungsform ist vorgesehen, daß der Dichtkörper als Dichtkonus mit dem konischen Sitz im Düsenhalter entsprechender konischer Außenform ausgebildet ist und daß die Gegen-Dichtfläche, auf welcher sich der Dichtkonus abstützt, durch die Oberseite der Zwischenscheibe gebildet ist.According to a first preferred embodiment provided that the sealing body as a sealing cone with corresponding to the conical seat in the nozzle holder is conical outer shape and that the Counter sealing surface on which the sealing cone is located supported by the top of the washer is formed.
Durch den Dichtkonus wird die Teilaufgabe gelöst, daß der Druckkanal hochdruckseitig an die Zwischenscheibe dichtend angeschlossen ist, ohne daß es einer Feinbearbeitung der zugewandten Stirnseite des Düsenhalters bedarf.The subtask is solved by the sealing cone the pressure channel on the high pressure side to the washer is sealingly connected, without it being a finish the facing end of the nozzle holder requirement.
Dabei wird die Verformbarkeit des Dichtkonus dadurch gefördert, daß der Dichtkonus in axialer Richtung kürzer bemessen ist als der Sitz, in dem er aufgenommen ist.The deformability of the sealing cone is thereby promoted that the sealing cone in the axial direction is shorter than the seat in which it is accommodated is.
Nach einer zweiten Ausführungsform ist vorgesehen,
daß der Dichtkörper als Dichtring mit zwei außenseitig
entgegengesetzt konischen Abschnitten ausgebildet
ist, wobei ein Abschnitt entsprechend dem konischen
Sitz im Düsenhalter, der andere Abschnitt entsprechend
einer konisch aufgeweiteten Mündung der Druckkanalbohrung
der Zwischenscheibe ausgebildet ist und
wobei die Gegen-Dichtfläche durch die Mündung der
Druckkanalbohrung der Zwischenscheibe gebildet ist.
Bei einem derartigen Dichtring mit zwei konischen
Abschnitten ist die erzielte Dichtwirkung besonders
gut und dauerhaft. Gleiches trifft auf eine dritte
Ausführungsfom gemäß dem Kennzeichen von Anspruch 5
zu, bei welcher die Zwischenscheibe durch ein
Dichtröhrchen, welches durch eine Stützbohrung der
Zwischenscheibe hindurchgesteckt ist, gewissermaßen
überbrückt wird; d.h., hier erfolgt die hochdruckseitige
Abdichtung direkt zwischen den einander
zugewandten Mündungen des Druckkanals, einerseits im
Düsenhalter, andererseits im Düsenkörper. According to a second embodiment,
that the sealing body as a sealing ring with two outside
formed opposite conical sections
is, with a section corresponding to the conical
Seat in the nozzle holder, the other section accordingly
a flared mouth of the pressure channel bore
the washer is formed and
the counter sealing surface through the mouth of the
Pressure channel bore of the washer is formed.
With such a sealing ring with two conical
The sealing effect achieved is special for sections
good and lasting. The same applies to a third
Embodiment according to the characterizing part of
Im folgenden werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen erläutert. Es zeigt
- Fig. 1
- einen Längsschnitt durch Düsenhalter/Düsenkörper vor dem vollständigen Anziehen der Düsenspannmutter,
- Fig. 2
- einen vergrößerten Abschnitt zu Fig. 1 im Bereich der Druckkanaldichtung,
- Fig. 3
- einen Längsschnitt gemäß Fig. 1 nach dem vollständigen Anziehen der Düsenspannmutter und
- Fig. 4 und 5
- jeweils eine Variante zu Fig. 2.
- Fig. 1
- a longitudinal section through the nozzle holder / nozzle body before the nozzle clamping nut is fully tightened,
- Fig. 2
- 1 in the area of the pressure channel seal,
- Fig. 3
- a longitudinal section of FIG. 1 after fully tightening the nozzle nut and
- 4 and 5
- each a variant of FIG. 2.
Die Einspritzvorrichtung gemäß den Fig. 1 bis 3
umfaßt einen Düsenhalter 1 mit einem Druckkanal 2, in
welchem der Kraftstoff in Richtung des Pfeils P1 von
der nicht dargestellten Einspritzpumpe zugeführt
wird, sowie einen Düsenkörper 3, welcher ebenfalls
mit einem Druckkanal 4 versehen ist, welcher über
eine noch näher zu beschreibende Hochdruckverbindung
den Druckkanal 2 des Düsenhalters 1 fortsetzt. Im
Düsenkörper 3 sitzt in einer zentrischen Bohrung die
Düsennadel 5, deren inneres Nadelende 6 ballig ausgebildet
ist. Das Nadelende 6 der Düsennadel 5 wird in
Richtung Düse vorgespannt mittels einer Druckfeder 8,
die in einer Mittelbohrung 7 des Düsenhalters 1 angeordnet
ist. Sie übt eine auf das Nadelende 6 in
Schließrichtung wirkende Kraft aus, indem sie sich
auf einen Druckbolzen 9 abstützt, welcher auf dem
balligen Nadelende 6 der Düsennadel 5 aufsitzt.The injection device according to FIGS. 1 to 3
comprises a
Düsenkörper 3 und Düsenhalter 1 werden mittels einer
Düsenspannmutter 10 zusammengespannt, welche mittels
eines Innengewindes 11 auf ein Außengewinde 12 des
Düsenhalters 1 aufgeschraubt ist.
Die Hochdruckverbindung zwischen Düsenhalter 1 und
Düsenkörper 3 wird hergestellt mittels einer
Zwischenscheibe 13, deren beide gegenüberliegende
Stirnseiten durch Härten, Schleifen und Läppen feinbearbeitet
sind. Durch eine zentrale Bohrung 14 der
Zwischenscheibe 13 ragt das Nadelende 6 hindurch.The high pressure connection between
Gemäß Fig. 1 ist die Düsenspannmutter 10 noch nicht
vollständig angezogen, so daß zwischen der Oberseite
15 der Zwischenscheibe 13 und der zugeordneten Stirnseite
16 des Düsenhalters 1 ein Spalt 17 gebildet
ist. Dieser Spalt 17 wird überbrückt von einem Dichtkonus
18 aus einer Stahllegierung mit begrenzt
verformbaren Eigenschaften bspw. aus Automatenstahl.
Der Dichtkonus 18 besitzt eine sich zur Zwischenscheibe
13 hin verbreitende konische Mantelfläche,
mit welcher er in einen entsprechenden konischen Sitz
19 im Mündungsbereich des Druckkanals 2 des Düsenhalters
1 hineinragt.1, the
Wird die Düsenspannmutter 10 weiter angezogen, so
verformt sich der Dichtkonus 18 wie in Fig. 3 gezeigt
nach innen hin, wobei er einen Endwulst 20 bildet,
bis er letztlich vollständig im Inneren des Sitzes 19
aufgenommen ist. In der in Fig. 3 dargestellten
Dichtposition bildet der Dichtkonus einen gegen den
Hochdruck im Druckkanal 2 dichten Abschluß einerseits
mit dem Sitz 19, andererseits mit der Oberseite 15
der Zwischenscheibe 13.If the
Die Abdichtung des Hochdruckbereichs gegenüber dem
Niederdruckbereich erfolgt dadurch, daß, wie in Fig.
2 vergrößert dargestellt, über die Stirnseite 16 des
Düsenhalters 1 eine Dichtkante konzentrisch durch den
mit der Wand des Nadelschließfederraums zusammenfallenden
Ort D verläuft, derart, daß die Dichtkante
mit der Mittelbohrung 7 des Düsenhalters 1 auf dessen
Stirnseite 16 zusammenfällt. Dadurch erübrigen sich
zusätzliche Dichtungsmaßnahmen zur Abdichtung des
Nadelschließfederraums. Der Ort D bildet somit den
Scheitelpunkt für den zwischen 0,5° und 3,0° betragenden
Winkel γ, welcher eine zur Stirnseite 16 des
Düsenhalters 1 entsprechend schräg verlaufende Restfläche
21 definiert. Die Restfläche 21 bildet somit
die Dichtkante bei D. Durch die Dichtkante ergibt
sich unter der Spannwirkung der Düsenspannmutter 10
eine die Dichtwirkung erhöhende zusätzliche Barriere
zwischen dem durch die beiden Druckkanäle 2, 4 gebildeten
Hochdruckteil einerseits und dem Niederdruckteil,
der durch die zentralen Innenräume im Düsenhalter
1 und im Düsenkörper 3 begrenzt ist.Sealing the high pressure area from the
Low pressure range is achieved in that, as in Fig.
2 shown enlarged, on the
Für die Dichtwirkung des Dichtkonus 18 ist sehr
wesentlich, daß dieser mit zunehmendem Aufschrauben
der Düsenspannmutter 10 sich im Sinne einer Zentrierung
selbst positionieren kann, während er sich
geringfügig verformt, wie in Fig. 3 dargestellt.For the sealing effect of the sealing
Die Fig. 4 und 5 zeigen jeweils eine Variante der
hochdruckseitigen Druckkanaldichtung in einer
Ausschnittsvergrößerung gemäß Fig. 2. Bei Fig. 4
besteht die Abweichung gegenüber Fig. 2 darin, daß
der Dichtkonus 18 ersetzt ist durch einen Dichtring
22, welcher im wesentlichen aus zwei außenseitig
entgegengesetzt konischen Abschnitten 26, 27 besteht,
deren Konusflächen sich zum jeweiligen Ende des
Dichtrings 22 hin verjüngen. Während der obere
Abschnitt 26 wie zu Fig. 2 beschrieben im unteren
Ende des Druckkanals 2 aufgenommen ist, tritt der
untere Abschnitt 27 in eine entsprechend konisch
ausgeweitete Mündung 23 der Druckkanalbohrung 2a der
Zwischenscheibe 13 auf deren Oberseite 15 ein. Durch
die auf diese Weise gegenüber Fig. 3 erzielte Vergrößerung
der Dichtflächen wird die Dichtwirkung noch
verbessert. Gleiches gilt für die Variante gemäß Fig.
5. Dort kommt ein Dichtröhrchen 25 zum Einsatz,
welches wie der Dichtring 22 (Fig. 4) zwei konische
Abschnitte 26, 27 an den beiden Enden aufweist, die
an einem hohlzylindrischen Mittelabschnitt 24
angesetzt sind, welcher von einer Stützbohrung 29 der
Zwischenscheibe 13 eng umfaßt ist. Während der obere
Abschnitt 26 wie zu Fig. 2 beschrieben im konischen
Sitz 19 des Druckkanals 2 aufgenommen ist, tritt der
untere Abschnitt 27 in eine entsprechend konisch
aufgeweitete Mündung 28 des Druckkanals 4 des
Düsenkörpers 3 ein.4 and 5 each show a variant of the
high pressure side seal in one
Enlarged section according to FIG. 2. In FIG. 4
the difference with respect to Fig. 2 is that
the sealing
Claims (6)
- Injection device for Diesel engines having a nozzle holder (1) the pressure channel (2, 4) of which is connected at one end to an injection pump and a nozzle at the other, whereby the nozzle holder (1) is supported at nozzle body (3) holding a nozzle needle (5) slidingly in the longitudinal direction by means of an intermediate disc (13) which seals this area, a deformable metallic hollow cylindrical sealing element (18) resting with one of its ends on the sealing face and being gradually deformed at its seat as the nozzle clamping nut (10) connecting the nozzle body (3) to the nozzle holder (1) is progressively tightened, characterised in that the sealing element (18) engages with its other end in conical seat (19) in the nozzle holder (1) at the end of the pressure channel (2) widening towards the nozzle body and that the end face (16) of the nozzle holder (1) is in the shape of a truncated cone, the remaining bevel face (21) forming a small taper angle (a) with the top end (15) of the intermediate disc (13) thus forming a concentric sealing edge (D) around a central inner space of the nozzle holder (1).
- Injection device according to Claim 2, characterised in that the sealing element is designed as a sealing cone (18) having a conical seat (19) in the nozzle holder (1) to suit its conical outer shape, and that the opposite sealing face, on which the sealing cone (18) is supported, is formed by the top (15) of the intermediate disc (13).
- Injection device according to Claim 2, characterised in that the sealing cone (18) is shorter in the axial direction than the seat (19) in which it rests.
- Injection device according to Claim 1, characterised in that the sealing element is designed as a sealing ring (22) comprising two opposite sections (26, 27) which are conical on the outside, one section (26) being designed to match the tapered seat (19) in the nozzle holder (1) and the other section (27) being designed to suit the conically widening end (23) of a pressure channel bore (2a) in the intermediate disc (13), an opposite sealing face being formed by the end (23) of the pressure channel bore (2a) in the intermediate disc (13).
- Injection device according to Claim 1, characterised in that the sealing element is designed as a sealing tube (25) comprising two opposite sections (26, 27), which are conical on the outside, at the opposite ends of a hollow cylindrical centre section (24), one section (26) being designed to match the tapered seat (19) in the nozzle holder (1) and the other section (27) being designed to match a conically widened end (28) of the pressure channel (4) of the nozzle body (3), the sealing tube (25) with its centre section (24) being closely surrounded by the corresponding backing bore (29) in the intermediate disc (13), and an opposite sealing face being formed by the end (28) of the pressure channel (4) of the nozzle body (3).
- Injection device according to Claim 1, characterised in that the diameter of the circle described by the sealing edge is the same as the centre bore of the nozzle holder (1) containing the thrust spring (8).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19614980A DE19614980C1 (en) | 1996-04-16 | 1996-04-16 | Injector |
| DE19614980 | 1996-04-16 | ||
| PCT/EP1997/001293 WO1997039237A1 (en) | 1996-04-16 | 1997-03-14 | Injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0894194A1 EP0894194A1 (en) | 1999-02-03 |
| EP0894194B1 true EP0894194B1 (en) | 2001-12-19 |
Family
ID=7791411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97908235A Expired - Lifetime EP0894194B1 (en) | 1996-04-16 | 1997-03-14 | Injection device |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0894194B1 (en) |
| JP (1) | JP3737126B2 (en) |
| KR (1) | KR100440819B1 (en) |
| CN (1) | CN1072771C (en) |
| AT (1) | ATE211217T1 (en) |
| BR (1) | BR9708571A (en) |
| CZ (1) | CZ289269B6 (en) |
| DE (2) | DE19614980C1 (en) |
| IN (1) | IN192023B (en) |
| TR (1) | TR199802094T2 (en) |
| WO (1) | WO1997039237A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914720B4 (en) * | 1999-03-31 | 2005-10-13 | Siemens Ag | Fuel injection valve for an internal combustion engine |
| DE19915685A1 (en) * | 1999-04-07 | 2000-10-12 | Delphi Tech Inc | Injection valve for fuel injection in an internal combustion engine |
| DE10008554A1 (en) * | 2000-02-24 | 2001-08-30 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| DE10155677A1 (en) * | 2001-11-13 | 2003-05-22 | Bosch Gmbh Robert | Fuel injection valve, for an IC motor, has a housing with two bodies and a high pressure fuel channel through the dividing line between them, with an inner seal with elastic distortion at the junction between the bodies |
| DE102004022428A1 (en) * | 2004-05-06 | 2005-12-01 | Siemens Ag | Injection valve for internal combustion engines |
| DE102008056519A1 (en) * | 2008-11-08 | 2010-05-12 | Man Diesel Se | Sealing system for sealing high pressure sealing area between components and component section of fuel-injection valve of combustion engine, has channels and channel section, which are integrated in components and component sections |
| AT511716B1 (en) * | 2011-12-09 | 2013-02-15 | Bosch Gmbh Robert | CONNECTION OF HIGH PRESSURE MEDIUM LEADING COMPONENTS OF AN INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE685057C (en) * | 1933-12-28 | 1939-12-11 | Bosch Gmbh Robert | Arrangement for regulating the amount of fuel injected in vehicle diesel engines |
| DE866423C (en) * | 1951-10-04 | 1953-02-09 | Eduard Dr Inden | Pipe connection or pipe coupling |
| FR2341751A1 (en) * | 1976-02-20 | 1977-09-16 | Semt | PROCEDURE AND DEVICE FOR REDUCING THE RISK OF LEAKING INJECTION FUEL, ESPECIALLY IN THE COOLING CIRCUIT OF THE INJECTORS OF A DIESEL ENGINE |
| JPS6066222A (en) * | 1983-09-21 | 1985-04-16 | Olympus Optical Co Ltd | Endoscope |
| DE3819729A1 (en) * | 1987-11-30 | 1989-06-08 | Ernst Nock | PIPE CONNECTION |
| US5205492A (en) * | 1991-12-16 | 1993-04-27 | Gregory Khinchuk | Fuel injection valve |
| JPH0666222A (en) * | 1992-08-19 | 1994-03-08 | Nippondenso Co Ltd | Fuel injector |
-
1996
- 1996-04-16 DE DE19614980A patent/DE19614980C1/en not_active Expired - Fee Related
-
1997
- 1997-03-14 TR TR1998/02094T patent/TR199802094T2/en unknown
- 1997-03-14 EP EP97908235A patent/EP0894194B1/en not_active Expired - Lifetime
- 1997-03-14 WO PCT/EP1997/001293 patent/WO1997039237A1/en active IP Right Grant
- 1997-03-14 JP JP53667997A patent/JP3737126B2/en not_active Expired - Fee Related
- 1997-03-14 CZ CZ19983077A patent/CZ289269B6/en not_active IP Right Cessation
- 1997-03-14 AT AT97908235T patent/ATE211217T1/en not_active IP Right Cessation
- 1997-03-14 DE DE59705893T patent/DE59705893D1/en not_active Expired - Fee Related
- 1997-03-14 BR BR9708571A patent/BR9708571A/en not_active IP Right Cessation
- 1997-03-14 KR KR10-1998-0706042A patent/KR100440819B1/en not_active IP Right Cessation
- 1997-03-14 CN CN97193354A patent/CN1072771C/en not_active Expired - Fee Related
- 1997-04-03 IN IN591CA1997 patent/IN192023B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000508733A (en) | 2000-07-11 |
| DE59705893D1 (en) | 2002-01-31 |
| TR199802094T2 (en) | 1999-03-22 |
| CN1214759A (en) | 1999-04-21 |
| KR19990082312A (en) | 1999-11-25 |
| CZ307798A3 (en) | 1999-06-16 |
| CN1072771C (en) | 2001-10-10 |
| DE19614980C1 (en) | 1997-09-18 |
| CZ289269B6 (en) | 2001-12-12 |
| KR100440819B1 (en) | 2004-10-15 |
| EP0894194A1 (en) | 1999-02-03 |
| JP3737126B2 (en) | 2006-01-18 |
| WO1997039237A1 (en) | 1997-10-23 |
| IN192023B (en) | 2004-02-07 |
| ATE211217T1 (en) | 2002-01-15 |
| BR9708571A (en) | 1999-08-03 |
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