EP0809756B1 - Fuel injection valve for internal combustion engines - Google Patents
Fuel injection valve for internal combustion engines Download PDFInfo
- Publication number
- EP0809756B1 EP0809756B1 EP96934344A EP96934344A EP0809756B1 EP 0809756 B1 EP0809756 B1 EP 0809756B1 EP 96934344 A EP96934344 A EP 96934344A EP 96934344 A EP96934344 A EP 96934344A EP 0809756 B1 EP0809756 B1 EP 0809756B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- spring
- fuel injection
- internal combustion
- section
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 18
- 239000007924 injection Substances 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 15
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000008141 laxative Substances 0.000 description 1
- 230000002475 laxative effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
Definitions
- the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
- Fuel injection valve is an axial valve member slidably guided in a valve body.
- the valve member has one at its one end on the combustion chamber side Valve sealing surface with which it is used for control purposes an injection cross section with a fixed valve seat cooperates on the valve body.
- the valve member turns on its other end distant from the combustion chamber by a valve spring acts on the valve member in contact with the Valve seat presses.
- This valve spring is in a spring chamber inside the housing of the injection valve here in one Holding body used and supports with your End facing away from the valve member on a stationary Abutment surface.
- the valve spring is as Coil spring formed, the one of a spring wire existing turns a circular cross-section exhibit.
- the fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that the Spring force of the valve spring can be increased without the required installation space of the valve spring in the housing to enlarge the injector, this advantage especially on springs with a very small inner diameter and thus small winding ratio (Dm / y up to 2.5) occurs.
- valve spring designed according to the invention compared to alternative wire cross-sections such as rectangular, elliptical or other shaped wires have the advantage that there is no additional effort in wire production and that Valve spring is therefore lighter and lighter than these solutions is cheaper to produce.
- Through the subsequent Grind the outside diameter of the valve spring more accurate outer diameter on the spring and thus better use of space in the specified spring space to reach. It also eliminates possible material defects on the outside diameter of the valve spring at the same time removed.
- this optimized spring is not up the use described in a fuel injector limited, but can take place wherever despite a limited installation space, the spring force of a Return spring should be increased, e.g. for injection pumps or gas exchange valves of internal combustion engines and the like.
- FIG. 1 shows a longitudinal section through the Fuel injection valve and Figure 2 is an enlarged Individual sectional view of the valve spring from FIG. 1.
- a piston-shaped valve member 1 is axially displaceably guided in a bore 3 of a valve body 5, which has at its one end near the combustion chamber of the internal combustion engine a conical valve sealing surface 7, with which it a conical valve seat 9 cooperates at the inwardly projecting closed end of the bore 3.
- the valve body 5 is axially clamped with its end remote from the combustion chamber by means of a clamping nut 11 against a valve holding body 13, an intermediate disk 15 with a central opening being clamped between the end faces of the valve body 5 and the valve holding body 13.
- valve spring 19 has external dimensions as in FIG. 2 shown enlarged, on the radial to the spring axis X. outward-facing ends of the annular Basic cross section y of their spring turns 41 bevels 43 on, parallel to the spring axis X and to the inner wall of the cylindrical spring chamber 21 are aligned.
- the remaining cross-sectional area is z Spring turns 41 are still 43 despite the bevels significantly larger than the cross-sectional area of a unprocessed valve spring with ring-shaped spring wire, whose outer diameter is the same size, so that the achieved Spring force of the valve spring 19 without additional space can be significantly enlarged.
Landscapes
- 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)
Abstract
Description
Die Erfindung geht von einem Kraftstoffeinspritzventil für Brennkraftmaschinen nach der Gattung des Patentanspruchs 1 aus. Bei einem derartigen, aus der DE-PS 29 43 744 bekannten Kraftstoffeinspritzventil ist ein Ventilglied axial verschiebbar in einem Ventilkörper geführt. Das Ventilglied weist an seinem einen, brennraumseitigen Ende eine Ventildichtfläche auf, mit der es zum Zweck der Steuerung eines Einspritzquerschnittes mit einem ortsfesten Ventilsitz am Ventilkörper zusammenwirkt. Das Ventilglied wird dabei an seinem anderen, brennraumfernen Ende von einer Ventilfeder beaufschlagt, die das Ventilglied in Anlage an den Ventilsitz preßt. Diese Ventilfeder ist in einen Federraum innerhalb des Gehäuses des Einspritzventils hier in einem Haltekörper eingesetzt und stützt sich mit ihrem dem Ventilglied abgewandten Ende an einer ortsfesten Anschlagfläche ab. Die Ventilfeder ist dabei als Schraubenfeder ausgebildet, deren aus einem Federdraht bestehende Windungen einen kreisförmigen Querschnitt aufweisen. The invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out. In such a known from DE-PS 29 43 744 Fuel injection valve is an axial valve member slidably guided in a valve body. The valve member has one at its one end on the combustion chamber side Valve sealing surface with which it is used for control purposes an injection cross section with a fixed valve seat cooperates on the valve body. The valve member turns on its other end distant from the combustion chamber by a valve spring acts on the valve member in contact with the Valve seat presses. This valve spring is in a spring chamber inside the housing of the injection valve here in one Holding body used and supports with your End facing away from the valve member on a stationary Abutment surface. The valve spring is as Coil spring formed, the one of a spring wire existing turns a circular cross-section exhibit.
Dabei bestimmt die Federkraft der Ventilfeder den Öffnungsdruck am Einspritzventil, der vom in Öffnungsrichtung am Ventilglied angreifenden Kraftstoffhochdruck aufgebaut wird. Der Leistungsfähigkeit bzw. der Federkraft der Ventilfeder kommt somit eine hohe Bedeutung zu, wobei diese Federkraft wesentlich von der Drahtquerschnittsfläche an den Windungen abhängig ist. Soll die Federkraft erhöht werden ist es bei herkömmlichem runden Draht üblich, die Drahtstärke zu erhöhen, da sich dessen maximale Fläche aus dem vorgegebenen Außen- und Innendurchmesser des Windungsquerschnittes ergibt.The spring force of the valve spring determines the Opening pressure at the injector, which is from in Opening direction attacking the valve member High fuel pressure is built up. The performance or the spring force of the valve spring is therefore high Significance, whereby this spring force is significantly different from that Wire cross-sectional area depends on the turns. Should the spring force can be increased with conventional rounding Wire usual to increase the wire gauge because of this maximum area from the given exterior and Inside diameter of the winding cross section results.
Dabei weist das bekannte Kraftstoffeinspritzventil jedoch den Nachteil auf, daß einer Vergrößerung der Drahtstärke oder einer axialen Verlängerung der Ventilfeder für eine Erhöhung der Federkraft konstruktive Grenzen gesetzt sind, da der vorgegebene Bauraum des Federraumes begrenzt ist und sich nicht ohne umfangreiche Änderungen am Einspritzventil vergrößern läßt, so daß eine Erhöhung der Federkraft der Ventilfeder nicht ohne aufwendige Veränderungen am Einspritzventil möglich ist.However, the known fuel injection valve the disadvantage that an increase in wire thickness or an axial extension of the valve spring for one Design limits are set to increase the spring force, since the given space of the spring chamber is limited and not without extensive changes to the injector can enlarge, so that an increase in the spring force of Valve spring not without extensive changes on Injector is possible.
Das erfindungsgemäße Kraftstoffeinspritzventil für Brennkraftmaschinen mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil, daß die Federkraft der Ventilfeder vergrößert werden kann, ohne dabei den benötigten Einbauraum der Ventilfeder im Gehäuse des Einspritzventils zu vergrößern, wobei dieser Vorteil besonders an Federn mit sehr kleinem Innendurchmesser und somit kleinem Wickelverhältnis (Dm/y bis zu 2,5) auftritt.The fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that the Spring force of the valve spring can be increased without the required installation space of the valve spring in the housing to enlarge the injector, this advantage especially on springs with a very small inner diameter and thus small winding ratio (Dm / y up to 2.5) occurs.
Dies wird in vorteilhafter Weise möglich, indem die als Schraubenfeder ausgebildete Ventilfeder aus stärkerem Federdraht mit einem vergrößerten Grundquerschnitt an den Windungen gefertigt wird und dann am Außendurchmesser soweit abgeschliffen wird, daß die Ventilfeder gerade in den zylindrischen Federraum einsetzbar ist und dort zur Innenwand lediglich so viel Spiel aufweist, wie beim Zusammendrücken der Ventilfeder benötigt wird. Der zunächst kreisförmige Grundquerschnitt der Federwindungen weist dann an seinen zur Federachse radial auswärts weisenden Enden Anschliffe auf, die parallel zur Federachse und zur Wand des Federraumes ausgerichtet sind.This is advantageously possible by using the as Coil spring formed valve spring made of stronger Spring wire with an enlarged basic cross section on the Windings is manufactured and then the outer diameter so far is ground that the valve spring just in the cylindrical spring chamber can be used and there Inner wall only has as much play as with Compression of the valve spring is required. The first one circular basic cross section of the spring turns then points at its ends pointing radially outward to the spring axis Grindings that are parallel to the spring axis and to the wall of the spring chamber are aligned.
Auf diese Weise lassen sich bei gleichbleibendem Bauraum der Ventilfeder größere Öffnungsdrücke und bei der Verwendung von zwei hintereinander wirksam werdenden Ventilfedern an sogenannten 2-Feder-Haltern größere Öffnungsdruckdifferenzen realisieren.In this way, the Valve spring larger opening pressures and when using of two valve springs that take effect one after the other so-called 2-spring holders larger opening pressure differences realize.
Zudem kann die Toleranz am Außendurchmesser der Ventilfeder gegenüber unbearbeiteten Federn auf ein Minimalmaß reduziert werden.In addition, the tolerance on the outer diameter of the valve spring reduced to a minimum compared to unprocessed springs become.
Dabei hat die erfindungsgemäß ausgebildete Ventilfeder gegenüber alternativen Drahtquerschnitten wie rechteckigen, elliptischen oder sonstigen Formdrähten den Vorteil, daß kein Mehraufwand bei der Drahtherstellung anfällt und die Ventilfeder somit gegenüber diesen Lösungen leichter und kostengünstiger herstellbar ist. Durch das nachträgliche Abschleifen des Außendurchmessers der Ventilfeder lassen sich zudem genauere Außendurchmesser an der Feder und somit eine bessere Raumausnutzung im vorgegebenen Federraum erreichen. Zudem werden auf diese Weise mögliche Werkstoff-Fehler am Außendurchmesser der Ventilfeder gleichzeitig mitentfernt. The valve spring designed according to the invention compared to alternative wire cross-sections such as rectangular, elliptical or other shaped wires have the advantage that there is no additional effort in wire production and that Valve spring is therefore lighter and lighter than these solutions is cheaper to produce. Through the subsequent Grind the outside diameter of the valve spring more accurate outer diameter on the spring and thus better use of space in the specified spring space to reach. It also eliminates possible material defects on the outside diameter of the valve spring at the same time removed.
Die Verwendung dieser optimierten Feder ist dabei nicht auf den beschriebenen Einsatz in einem Kraftstoffeinspritzventil beschränkt, sondern kann überall dort erfolgen, wo trotz eines beschränkten Einbauraumes die Federkraft einer Rückstellfeder erhöht werden soll, z.B. bei Einspritzpumpen oder Gaswechselventilen von Brennkraftmaschinen und ähnlichem.The use of this optimized spring is not up the use described in a fuel injector limited, but can take place wherever despite a limited installation space, the spring force of a Return spring should be increased, e.g. for injection pumps or gas exchange valves of internal combustion engines and the like.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous configurations of the The invention relates to the description of Drawing and the claims can be removed.
Ein Ausführungsbeispiel des erfindungsgemäßen Kraftstoffeinspritzventils für Brennkraftmaschinen ist in der Zeichnung dargestellt und wird in der folgenden Beschreibung näher erläutert.An embodiment of the invention Fuel injection valve for internal combustion engines is in of the drawing and is shown in the following Description explained in more detail.
Es zeigen die Figur 1 einen Längsschnitt durch das Kraftstoffeinspritzventil und die Figur 2 eine vergrößerte Einzelschnittdarstellung der Ventilfeder aus der Figur 1.1 shows a longitudinal section through the Fuel injection valve and Figure 2 is an enlarged Individual sectional view of the valve spring from FIG. 1.
Bei dem in der Figur 1 dargestellten Ausführungsbeispiel des
erfindungsgemäßen Kraftstoffeinspritzventils für
Brennkraftmaschinen ist ein kolbenförmiges Ventilglied 1
axial verschiebbar in einer Bohrung 3 eines Ventilkörpers 5
geführt, das an seinem einen, dem Brennraum der
Brennkraftmaschine nahen Ende eine konische
Ventildichtfläche 7 aufweist, mit der es mit einem konischen
Ventilsitz 9 am nach innen kragenden geschlossenen Ende der
Bohrung 3 zusammenwirkt. Der Ventilkörper 5 ist dabei mit
seinem brennraumfernen Ende mittels einer Spannmutter 11
axial gegen einen Ventilhaltekörper 13 verspannt, wobei
zwischen den Stirnflächen des Ventilkörpers 5 und des
Ventilhaltekörpers 13 eine Zwischenscheibe 15 mit einer
zentralen Öffnung eingespannt ist.
An seinem dem Ventilsitz 9 abgewandten Ende wird das
Ventilglied 1 über ein die Zwischenscheibe 15 durchragendes
Druckstück 17 von einer als Schraubenfeder ausgebildeten
Ventilfeder 19 in Richtung Ventilsitz 9 beaufschlagt, die in
einen zylindrischen Federraum 21 im Ventilhaltekörper 13
eingesetzt ist und die sich andererseits an einem durch die
obere axiale Wand des Federraumes 21 gebildeten ortsfesten
Anschlag 23 abstützt.In the embodiment of the fuel injection valve for internal combustion engines shown in Figure 1, a piston-shaped valve member 1 is axially displaceably guided in a
At its end facing away from the
Desweiteren ist stromabwärts des Dichtsitzes zwischen der
Ventildichtfläche 7 und dem Ventilsitz 9 eine
Einspritzöffnung 25 in der Wand des Ventilkörpers 5
vorgesehen, die von der Bohrung 3 ausgehend in den Brennraum
der zu versorgenden Brennkraftmaschine mündet.Furthermore, is downstream of the sealing seat between the
Valve
Die Kraftstoffhochdruckzufuhr an den Dichtsitz erfolgt in
bekannter Weise über einen zwischen dem Schaft des
Ventilgliedes 1 und der Wand der Bohrung 3 gebildeten
Ringkanal 27, der sich im Bereich eines Ringabsatzes 31 des
Ventilgliedes 1 in einen Druckraum 29 erweitert, in den eine
von einer nicht gezeigten Einspritzpumpe abführende
Druckleitung 33 mündet.The high-pressure fuel supply to the sealing seat takes place in
known way over a between the shaft of the
Valve member 1 and the wall of the
Für eine Erhöhung der Federkraft bei gleichbleibenden
Außenabmessungen weist die Ventilfeder 19 wie in der Figur 2
vergrößert dargestellt, an den zur Federachse X radial
auswärts weisenden Enden des kreisringförmigen
Grundquerschnittes y ihrer Federwindungen 41 Anschliffe 43
auf, die parallel zur Federachse X und zu der Innenwand des
zylindrischen Federraumes 21 ausgerichtet sind. For an increase in spring force with the same
The
Dabei wird die Ventilfeder 19 zunächst aus einem runden
Federdraht mit derart großem Querschnitt y gefertigt, daß
der theoretische Außendurchmesser der unbearbeiteten
Ventilfeder 19 größer ist als der Innendurchmesser des
Federraumes 21. In einem anschließenden Arbeitsgang wird am
Außendurchmesser der Ventilfeder so viel Material
abgetragen, vorzugsweise abgeschliffen, daß die Ventilfeder
19 mit dem notwendigen Spiel gerade in den Federraum 21
einsetzbar ist.The
Dabei ist die verbleibende Querschnittsfläche z der
Federwindungen 41 trotz der Anschliffe 43 immer noch
bedeutend größer als die Querschnittsfläche einer
unbearbeiteten Ventilfeder mit ringförmigem Federdraht,
deren Außendurchmesser gleich groß ist, so daß die erzielte
Federkraft der Ventilfeder 19 ohne zusätzlichen Bauraum
erheblich vergrößert werden kann.The remaining cross-sectional area is z
Spring turns 41 are still 43 despite the bevels
significantly larger than the cross-sectional area of a
unprocessed valve spring with ring-shaped spring wire,
whose outer diameter is the same size, so that the achieved
Spring force of the
Das Verhältnis von y/z liegt dabei vorzugsweise in einem Bereich von 1,05 bis 1,3.The ratio of y / z is preferably one Range from 1.05 to 1.3.
Claims (3)
- Fuel injection valve for internal combustion engines, having a valve element (1) which can be displaced axially in a valve body (5) and at its one end has a valve-sealing surface (7) by means of which it interacts with a fixed valve seat (9) in order to control an injection cross section, and having at least one valve spring (19) which acts upon the valve element (1) in the direction of the valve seat (9), is arranged in a spring chamber (21) and at its other end is supported against a fixed stop (23) and is designed as a helical spring, the coils of which having a circular basic cross section (y), characterized in that in a region pointing radially outwards with respect to its spring axis (X) the valve spring (19) has a ground surface (43) which is aligned parallel to the spring axis (X), with the result that the outside diameter (da) of the valve spring (19), which diameter is reduced by means of the ground surfaces (43), has a small clearance with respect to the inside diameter of the spring chamber (21).
- Fuel injection valve according to Claim 1, characterized in that the spring chamber (21) is of cylindrical design, and in that its inside diameter is designed so that it is smaller than the outside diameter of the unmachined valve spring (19) without ground surfaces (43).
- Fuel injection valve according to Claim 1, characterized in that the ratio y/z of the valve spring (19) preferably lies within the range of 1.05 to 1.3.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19547102 | 1995-12-16 | ||
| DE19547102A DE19547102A1 (en) | 1995-12-16 | 1995-12-16 | Fuel injection valve for internal combustion engines |
| PCT/DE1996/001480 WO1997022801A1 (en) | 1995-12-16 | 1996-08-08 | Fuel injection valve for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0809756A1 EP0809756A1 (en) | 1997-12-03 |
| EP0809756B1 true EP0809756B1 (en) | 2001-12-12 |
Family
ID=7780367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96934344A Expired - Lifetime EP0809756B1 (en) | 1995-12-16 | 1996-08-08 | Fuel injection valve for internal combustion engines |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5934572A (en) |
| EP (1) | EP0809756B1 (en) |
| JP (1) | JP3737124B2 (en) |
| DE (2) | DE19547102A1 (en) |
| WO (1) | WO1997022801A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19719295A1 (en) | 1997-05-07 | 1998-11-12 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| JP4016370B2 (en) * | 1999-03-29 | 2007-12-05 | 株式会社デンソー | solenoid valve |
| DE10016425A1 (en) | 2000-04-01 | 2001-10-04 | Bosch Gmbh Robert | High performance coil spring has flattened outer edges and adjacent inner edges |
| US6776401B2 (en) * | 2000-04-01 | 2004-08-17 | Robert Bosch Gmbh | Helical compression spring for use in a component of a fuel injection system |
| US6784370B1 (en) | 2003-07-21 | 2004-08-31 | Ideal Industries, Inc. | Twist-on wire connector |
| US20060107511A1 (en) * | 2004-11-23 | 2006-05-25 | Richard Pare | Methods and apparatus for centering spring reactive forces |
| DE102007050819A1 (en) * | 2007-10-24 | 2009-04-30 | Robert Bosch Gmbh | Electromagnetically actuated valve |
| DE102018001566A1 (en) * | 2018-02-23 | 2019-09-26 | Woodward L'orange Gmbh | Dual-fuel fuel injector |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB286445A (en) * | 1927-02-22 | 1928-03-08 | Henry Beaumont Taylor | Improvements in or relating to internal combustion engines |
| US2521670A (en) * | 1945-12-05 | 1950-09-05 | Fletcher Trust Company | Clutch spring |
| US2586646A (en) * | 1946-03-29 | 1952-02-19 | Thompson Prod Inc | Joint |
| US2622448A (en) * | 1951-06-04 | 1952-12-23 | United States Steel Corp | Apparatus for automatically centering and aligning moving objects |
| DE1803732A1 (en) * | 1965-10-25 | 1969-06-04 | Cohausz Dipl Ing Werner | Injection nozzle |
| FR1512436A (en) * | 1966-12-23 | 1968-02-09 | Pressure tank | |
| DE2020678A1 (en) * | 1970-04-28 | 1971-11-25 | Daimler Benz Ag | Helical compression spring |
| DE3727366A1 (en) * | 1987-08-17 | 1989-03-02 | Bosch Gmbh Robert | Fuel injection nozzle for internal combustion engines |
| GB9012288D0 (en) * | 1990-06-01 | 1990-07-18 | Lucas Ind Plc | Fuel injection pump |
-
1995
- 1995-12-16 DE DE19547102A patent/DE19547102A1/en not_active Withdrawn
-
1996
- 1996-08-08 DE DE59608445T patent/DE59608445D1/en not_active Expired - Lifetime
- 1996-08-08 EP EP96934344A patent/EP0809756B1/en not_active Expired - Lifetime
- 1996-08-08 JP JP52240297A patent/JP3737124B2/en not_active Expired - Fee Related
- 1996-08-08 WO PCT/DE1996/001480 patent/WO1997022801A1/en not_active Ceased
- 1996-08-08 US US08/894,503 patent/US5934572A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5934572A (en) | 1999-08-10 |
| JPH11501102A (en) | 1999-01-26 |
| WO1997022801A1 (en) | 1997-06-26 |
| DE19547102A1 (en) | 1997-06-19 |
| DE59608445D1 (en) | 2002-01-24 |
| JP3737124B2 (en) | 2006-01-18 |
| EP0809756A1 (en) | 1997-12-03 |
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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 |
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