EP1109998B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP1109998B1
EP1109998B1 EP00952881A EP00952881A EP1109998B1 EP 1109998 B1 EP1109998 B1 EP 1109998B1 EP 00952881 A EP00952881 A EP 00952881A EP 00952881 A EP00952881 A EP 00952881A EP 1109998 B1 EP1109998 B1 EP 1109998B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
closing
bore
valve member
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
EP00952881A
Other languages
German (de)
French (fr)
Other versions
EP1109998A1 (en
Inventor
Detlev Potz
Günter LEWENTZ
Uwe Gordon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1109998A1 publication Critical patent/EP1109998A1/en
Application granted granted Critical
Publication of EP1109998B1 publication Critical patent/EP1109998B1/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
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M61/04Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042The valves being provided with fuel passages
    • F02M61/045The valves being provided with fuel discharge orifices
    • 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
    • F02M61/04Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M61/20Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines, with one in a bore of a Valve body against the force of a closing spring axially after externally displaceable valve member, the at his combustion chamber-side end protruding from the bore, a Valve closure member forming the closing head, the on its valve body side facing a valve sealing surface with which he with one on the combustion chamber side Front side of the valve body arranged valve seat surface cooperates, and with at least one of a pressure chamber outgoing injection opening on the closing head, whose Outlet opening in the closed position of the valve member from Valve body covered and directed outward Opening stroke is released.
  • A-nozzle that is, a nozzle opening outward toward the combustion chamber is off DE 196 18 698 A1 and DE 196 42 440 A1. at These fuel injectors will always be the opening stroke damped the valve member. In some embodiments in addition, the closing movement of the valve member attenuated.
  • the object of the invention is to provide a fuel injection valve to provide an increased life. In particular, should the forces occurring in the closing movement can be reduced.
  • the task is with a fuel injection valve for Internal combustion engine according to the preamble of claim 1 characterized solved that the hydraulic closing damping device a Damper piston and a blind bore in a valve holding body includes that the longitudinal axis of a blind bore with the Longitudinal axis of the valve member coincides that the Damper piston guided in the blind bore reciprocable is and that the combustion chamber remote end of the valve member at the Front side of the damper piston rests.
  • Another particular embodiment of the invention is characterized characterized in that the guidance of the piston in the Valve holding body is milled to a sealing To ensure guidance of the piston. This will ensured that the hydraulic pressure for damping builds up the movement in front of the closing piston.
  • Another particular embodiment of the invention is characterized characterized in that the piston through one in the blind bore arranged return spring is biased. This will achieved that the piston when opening and closing the Valve member movement follows.
  • Another particular embodiment of the invention is characterized characterized in that the blind bore with hydraulic fluid, especially oil, is filled.
  • the Fluid volume is compressed when the piston is at the closing movement of the valve member against the Return spring force is pushed into the blind hole. As a result, the closing movement of the valve member is clear braked.
  • Another particular embodiment of the invention is characterized in that the interior of the blind bore via a throttle with a relief chamber in connection stands. This will prevent the Closing speed of the valve member reduced to zero and the valve member may not be complete closes.
  • Fuel injection valve has a valve body 1, the one with its lower free end in the combustion chamber to supplying internal combustion engine protrudes. With his upper one Brennraumfernen face 3 is the valve body. 1 by means of a clamping nut 5 axially against a Valve holding body 7 biased.
  • the valve body 1 has an axial through hole 9, in the one piston-shaped valve member 11 guided axially displaceable is.
  • the valve member 11 has at its combustion chamber side lower end projecting from the bore 9, a Valve closure member forming the closing head 13. Of the Closing head 13 has on its the valve body. 1 side facing a valve sealing surface 15, with which he with a on the combustion chamber side end of the Valve body 1 arranged valve seat 17th interacts ..
  • annular pressure chamber 19 Between the valve member 11 and the wall of the bore 9 is an annular pressure chamber 19 is formed.
  • the pressure chamber 19 is the combustion chamber side of a ring shoulder 21st forming diameter extension of the valve member eleventh limited, which merges into the closing head 13.
  • Lead from the annular shoulder 21 (not shown) Injection openings from, initially as a longitudinal bore are formed, of which then in the amount of the closing head 13 remove cross holes.
  • the outlet openings of the Injection openings on the wall of the valve member 11 are arranged so that they are in the closed position of Valve member 11 of the bore wall 9 of the valve body. 1 are covered and only when outward Opening stroke of the valve member 11 by Ausforce from the Drilled hole 9.
  • the valve member 11 projects with its shaft 27 in a in Holding body 7 provided spring chamber 29.
  • the Fuel supply in the pressure chamber 19 of the injection valve takes place via an outgoing from a high pressure source Pressure line 20.
  • a free end 35 of the valve member shaft 27th educated On the side facing away from the combustion chamber of the annular shoulder 33rd is a free end 35 of the valve member shaft 27th educated.
  • the valve member end 35 is located in System against a damper piston 37.
  • the damper piston 37 is reciprocable in a blind bore 39 added.
  • the damper piston 37 limited in the Blind bore 39 a damping chamber 41.
  • the damping chamber 41st is via a throttle bore 43 with a return line 45 in connection.
  • the return line 45 in turn is available one (not shown). Relief room in connection.
  • a return spring 47th arranged in the damping chamber 41.
  • the return spring 47 is against the Damping piston 37 biased.
  • Embodiment of the invention is the throttle effect not by a throttle bore, but by an am Damping piston 37 formed throttle cross-section 49th reached. That is, the damping space 41 is above the Throttle cross-section 49 connected to the return line 45, which in turn with the (not shown) discharge space communicates.

Landscapes

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

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Kraftstoffeinspritzventil für Brennkraftmaschinen, mit einem in einer Bohrung eines Ventilkörpers entgegen der Kraft einer Schließfeder axial nach außen verschiebbaren Ventilglied, das an seinem brennraumseitigen Ende einen aus der Bohrung ragenden, ein Ventilschließglied bildenden Schließkopf aufweist, der auf seiner dem Ventilkörper zugewandten Seite eine Ventildichtfläche aufweist, mit der er mit einer an der brennraumseitigen Stirnseite des Ventilkörpers angeordneten Ventilsitzfläche zusammenwirkt, und mit wenigstens einer von einem Druckraum ausgehenden Einspritzöffnung am Schließkopf, deren Austrittsöffnung in Schließstellung des Ventilgliedes vom Ventilkörper abgedeckt und beim nach außen gerichteten Öffnungshub freigegeben wird.The invention relates to a fuel injection valve for Internal combustion engines, with one in a bore of a Valve body against the force of a closing spring axially after externally displaceable valve member, the at his combustion chamber-side end protruding from the bore, a Valve closure member forming the closing head, the on its valve body side facing a valve sealing surface with which he with one on the combustion chamber side Front side of the valve body arranged valve seat surface cooperates, and with at least one of a pressure chamber outgoing injection opening on the closing head, whose Outlet opening in the closed position of the valve member from Valve body covered and directed outward Opening stroke is released.

Ein derartiges Kraftstoffeinspritzventil mit einer sog. A-Düse, also einer nach außen, zum Brennraum hin öffnenden Düse, ist aus der DE 196 18 698 A1 und der DE 196 42 440 A1 bekannt. Bei diesen Kraftstoffeinspritzventilen wird immer der Öffnungshub des Ventilglieds gedämpft. Bei manchen Ausführungsbeispielen wird zusätzlich auch die Schließbewegung des Ventilglieds gedämpft. Such a fuel injection valve with a so-called. A-nozzle, that is, a nozzle opening outward toward the combustion chamber is off DE 196 18 698 A1 and DE 196 42 440 A1. at These fuel injectors will always be the opening stroke damped the valve member. In some embodiments in addition, the closing movement of the valve member attenuated.

Systembedingt wird das Ventilglied bei Beendigung der Einspritzung in der Schließbewegung auf Zug beansprucht. Während der Schließbewegung wirken, bedingt durch die Schließfeder und den Brennraumgasdruck, hohe Schließkräfte. Die hohen Schließkräfte können zu Beschädigungen der betroffenen Bauteile führen. Due to the system, the valve member at the end of the Injection claimed in the closing movement to train. While the closing movement act, due to the closing spring and the combustion chamber gas pressure, high closing forces. The high Closing forces can damage the affected components to lead.

Aufgabe der Erfindung ist es, ein Kraftstoffeinspritzventil mit einer erhöhten Lebensdauer bereitzustellen. Insbesondere sollen die in der Schließbewegung auftretenden Kräfte reduziert werden.The object of the invention is to provide a fuel injection valve to provide an increased life. In particular, should the forces occurring in the closing movement can be reduced.

Die Aufgabe ist bei einem Kraftstoffeinspritzventil für Brennkraftmaschinen nach dem Oberbegriff des Anspruchs 1 dadurch gelöst, dass die hydraulische Schließdämpfungseinrichtung einen Dämpferkolben und eine Sackbohrung in einem Ventilhaltekörper umfasst, dass die Längsachse der eine Sackbohrung mit der Längsachse des Ventilgliedes zusammenfällt, dass der Dämpferkolben in der Sackbohrung hin- und herbewegbar geführt ist und dass das brennraumferne Ende des Ventilgliedes an der Stirnseite des Dämpferkolbens anliegt.The task is with a fuel injection valve for Internal combustion engine according to the preamble of claim 1 characterized solved that the hydraulic closing damping device a Damper piston and a blind bore in a valve holding body includes that the longitudinal axis of a blind bore with the Longitudinal axis of the valve member coincides that the Damper piston guided in the blind bore reciprocable is and that the combustion chamber remote end of the valve member at the Front side of the damper piston rests.

Die in der Schließbewegung auftretenden hohen Schließkräfte führen zu hohen Ventilgliedgeschwindigkeiten. Beim Auftreffen der Ventildichtfläche auf die "steife" Ventilsitzfläche werden die bewegten Massen schlagartig verzögert. Die hohen negativen Beschleunigungswerte und die Trägheit der bewegten Massen führen zu sehr großen Zugkräften in dem Ventilglied. Die Zugkräfte können zu einem Bruch des Ventilgliedes führen. Durch die hydraulische Schließdämpfungseinrichtung wird die Zugbelastung in dem Ventilglied erheblich reduziert, da durch die Dämpfung der Ventilgliedgeschwindigkeit der Impuls und somit der beim Auftreffen der Ventildichtfläche auf die Ventilsitzfläche auftretende Stoß reduziert werden. Somit wird die im Betrieb auftretende Belastung für den ganzen Ventilsitz geringer. Außerdem kann es bei Betriebspunkten mit hoher Ventilgliedschließgeschwindigkeit zu einem sog. Prellen des Ventilgliedes an der Ventilsitzfläche kommen, d.h. es kommt zu einem kurzzeitigen Wiederöffnen des Ventilgliedes. Dieses Wiederöffnen bei Spritzende ist für die Abgasemissionen sehr schädlich. Durch die Dämpfung der Ventilgliedbewegung kurz vor Schließende kann die Prellerneigung deutlich verringert werden.The high closing forces occurring in the closing movement lead to high valve member speeds. When striking the valve sealing surface to the "stiff" valve seat surface the moving masses are suddenly delayed. The high negative Acceleration values and the inertia of the moving masses lead to very large tensile forces in the valve member. The tensile forces can lead to breakage of the valve member. By the hydraulic closing device is the tensile load considerably reduced in the valve member, as by the damping the valve member speed of the pulse and thus the at Impingement of the valve sealing surface on the valve seat surface occurring impact can be reduced. Thus, the in operation occurring load for the whole valve seat less. It can also be at operating points with high Valve member closing speed to a so-called. Bouncing the Valve member come to the valve seat surface, i. it comes to a brief reopening of the valve member. This Reopening at the end of injection is very good for exhaust emissions harmful. Due to the damping of the valve member movement shortly before Closing the bounce can be significantly reduced.

Da beim Öffnungshub keine Wirkverbindung zwischen dem Dämpferkolben und dem Ventilglied bei dem erfindungsgemäßen Einspritzventil vorliegt, entfaltet der Dämpferkolben seine Dämpfungswirkung nur in der Schließbewegung des Ventilgliedes. Dadurch wird die Öffnungsbewegung des Ventilglieds nicht von der Dämpfungseinrichtung verzögert und auch sonst nicht beeinflußt.Since the opening stroke no operative connection between the Damper piston and the valve member in the inventive Injection valve is present, the damper piston unfolds its Damping effect only in the closing movement of the valve member. As a result, the opening movement of the valve member is not affected by the Damping device delayed and otherwise not affected.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die Führung des Kolbens in dem Ventilhaltekörper paarungsgeschliffen ist, um eine dichtende Führung des Kolbens zu gewährleisten. Dadurch wird sichergestellt, dass sich der hydraulische Druck zur Dämpfung der Bewegung vor dem Schließkolben aufbaut.Another particular embodiment of the invention is characterized characterized in that the guidance of the piston in the Valve holding body is milled to a sealing To ensure guidance of the piston. This will ensured that the hydraulic pressure for damping builds up the movement in front of the closing piston.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass der Kolben durch eine in der Sackbohrung angeordnete Rückstellfeder vorgespannt ist. Dadurch wird erreicht, dass der Kolben beim Öffnen und Schließen der Ventilgliedbewegung folgt.Another particular embodiment of the invention is characterized characterized in that the piston through one in the blind bore arranged return spring is biased. This will achieved that the piston when opening and closing the Valve member movement follows.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die Sackbohrung mit Hydraulikflüssigkeit, insbesondere Öl, befüllt ist. Das Flüssigkeitsvolumen wird komprimiert, wenn der Kolben bei der Schließbewegung des Ventilgliedes entgegen der Rückstellfederkraft in die Sackbohrung geschoben wird. Dadurch wird die Schließbewegung des Ventilglieds deutlich abgebremst.Another particular embodiment of the invention is characterized characterized in that the blind bore with hydraulic fluid, especially oil, is filled. The Fluid volume is compressed when the piston is at the closing movement of the valve member against the Return spring force is pushed into the blind hole. As a result, the closing movement of the valve member is clear braked.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass der Innenraum der Sackbohrung über eine Drossel mit einem Entlastungsraum in Verbindung steht. Dadurch wird verhindert, dass die Schließgeschwindigkeit des Ventilgliedes auf Null reduziert wird und das Ventilglied möglicherweise nicht vollständig schließt.Another particular embodiment of the invention is characterized in that the interior of the blind bore via a throttle with a relief chamber in connection stands. This will prevent the Closing speed of the valve member reduced to zero and the valve member may not be complete closes.

Weitere besondere Ausführungsarten der Erfindung sind dadurch gekennzeichnet, dass die Drossel von einer Drosselbohrung in dem Ventilhaltekörper gebildet ist, oder dass die Drossel durch Flächenanschliffe an dem Kolben gebildet ist. Durch die Form und Größe der möglichen Drosselquerschnitte kann mit der hydraulischen Schließdämpfungseinrichtung eine bestimmte Schließcharakteristik erzeugt werden. Am Anfang des Schließvorgangs soll die Dämpfung gering sein, damit die Schließbewegung zu diesem Zeitpunkt nicht verlangsamt wird. Gegen Ende der Schließbewegung soll die Dämpfung deutlich zunehmen, um die Geschwindigkeit mit der die Ventildichtfläche auf die Ventilsitzfläche trifft, spürbar zu reduzieren.Other particular embodiments of the invention are characterized in that the throttle of a Throttle hole is formed in the valve holding body, or that the throttle by Flächenanschliffe on the piston is formed. Due to the shape and size of the possible Throttling cross sections can be with the hydraulic Closing damper a specific Closing characteristic can be generated. At the beginning of the Closing should the damping be low, so that the Closing movement is not slowed down at this time. Towards the end of the closing movement the damping should be clear increase the speed with the the Valve sealing surface meets the valve seat surface, noticeable to reduce.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung zwei Ausführungsbeispiele der Erfindung im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein. Further advantages, features and details of the invention will be apparent from the following description in which with reference to the drawing two Embodiments of the invention described in detail are. It can in the claims and in the Description mentioned features each individually or be essential to the invention in any combination.

In der Zeichnung zeigen:

Figur 1
ein erstes Ausführungsbeispiel im Längsschnitt durch das Einspritzventil; und
Figur 2
ein zweites Ausführungsbeispiel im Längsschnitt durch das Einspritzventil.
In the drawing show:
FIG. 1
a first embodiment in longitudinal section through the injection valve; and
FIG. 2
a second embodiment in longitudinal section through the injection valve.

Das in Figur 1 im Längsschnitt dargestellte erste Ausführungsbeispiel des erfindungsgemäßen Kraftstoffeinspritzventils weist einen Ventilkörper 1 auf, der mit seinem unteren freien Ende in den Brennraum der zu versorgenden Brennkraftmaschine ragt. Mit seiner oberen brennraumfernen Stirnfläche 3 ist der Ventilkörper 1 mittels einer Spannmutter 5 axial gegen einen Ventilhaltekörper 7 vorgespannt. Der Ventilkörper 1 weist eine axiale Durchgangsbohrung 9 auf, in der ein kolbenförmiges Ventilglied 11 axial verschiebbar geführt ist. Das Ventilglied 11 weist an seinem brennraumseitigen unteren Ende einen aus der Bohrung 9 ragenden, ein Ventilschließglied bildenden Schließkopf 13 auf. Der Schließkopf 13 weist auf seiner dem Ventilkörper 1 zugewandten Seite eine Ventildichtfläche 15 auf, mit der er mit einer an der brennraumseitigen Stirnseite des Ventilkörpers 1 angeordneten Ventilsitzfläche 17 zusammenwirkt..The first shown in Figure 1 in longitudinal section Embodiment of the invention Fuel injection valve has a valve body 1, the one with its lower free end in the combustion chamber to supplying internal combustion engine protrudes. With his upper one Brennraumfernen face 3 is the valve body. 1 by means of a clamping nut 5 axially against a Valve holding body 7 biased. The valve body 1 has an axial through hole 9, in the one piston-shaped valve member 11 guided axially displaceable is. The valve member 11 has at its combustion chamber side lower end projecting from the bore 9, a Valve closure member forming the closing head 13. Of the Closing head 13 has on its the valve body. 1 side facing a valve sealing surface 15, with which he with a on the combustion chamber side end of the Valve body 1 arranged valve seat 17th interacts ..

Zwischen dem Ventilglied 11 und der Wand der Bohrung 9 ist ein ringförmiger Druckraum 19 ausgebildet. Der Druckraum 19 ist brennraumseitig von einer eine Ringschulter 21 bildenden Durchmessererweiterung des Ventilglieds 11 begrenzt, die in den Schließkopf 13 übergeht. Dabei führen von der Ringschulter 21 (nicht dargestellte) Einspritzöffnungen ab, die zunächst als Längsbohrung ausgebildet sind, von denen dann in Höhe des Schließkopfes 13 Querbohrungen abführen. Die Austrittsöffnungen der Einspritzöffnungen an der Wand des Ventilgliedes 11 sind dabei so angeordnet, dass sie in Schließstellung des Ventilgliedes 11 von der Bohrungswand 9 des Ventilkörpers 1 abgedeckt sind und erst beim nach außen gerichteten Öffnungshub des Ventilgliedes 11 durch Austauchen aus der Bohrung 9 aufgesteuert werden.Between the valve member 11 and the wall of the bore 9 is an annular pressure chamber 19 is formed. The pressure chamber 19 is the combustion chamber side of a ring shoulder 21st forming diameter extension of the valve member eleventh limited, which merges into the closing head 13. Lead from the annular shoulder 21 (not shown) Injection openings from, initially as a longitudinal bore are formed, of which then in the amount of the closing head 13 remove cross holes. The outlet openings of the Injection openings on the wall of the valve member 11 are arranged so that they are in the closed position of Valve member 11 of the bore wall 9 of the valve body. 1 are covered and only when outward Opening stroke of the valve member 11 by Austauchen from the Drilled hole 9.

Das Ventilglied 11 ragt mit seinem Schaft 27 in einen im Haltekörper 7 vorgesehenen Federraum 29. Zur Gewährleistung einer dichten Anlage des Ventilgliedes 11 am Ventilsitz 17 bei geschlossenem Einspritzventil und für eine Rückstellbewegung des Ventilgliedes 11 ist eine Schließfeder 31 gegen einen am Ventilgliedschaft 27 ausgebildeten Ringabsatz 33 vorgespannt. Die Kraftstoffzufuhr in den Druckraum 19 des Einspritzventils erfolgt über eine von einer Hochdruckquelle ausgehende Druckleitung 20.The valve member 11 projects with its shaft 27 in a in Holding body 7 provided spring chamber 29. To ensure a tight contact of the valve member 11 on the valve seat 17th with closed injection valve and for a Return movement of the valve member 11 is a Closing spring 31 against a valve member shaft 27th trained annular shoulder 33 biased. The Fuel supply in the pressure chamber 19 of the injection valve takes place via an outgoing from a high pressure source Pressure line 20.

Auf der dem Brennraum abgewandten Seite des Ringabsatzes 33 ist ein freies Ende 35 des Ventilgliedschaftes 27 ausgebildet. Das Ventilgliedschaftsende 35 befindet sich in Anlage gegen einen Dämpferkolben 37. Der Dämpferkolben 37 ist hin- und herbewegbar in einer Sackbohrung 39 aufgenommen. Der Dämpferkolben 37 begrenzt in der Sackbohrung 39 einen Dämpfungsraum 41. Der Dämpfungsraum 41 steht über eine Drosselbohrung 43 mit einer Rücklaufleitung 45 in Verbindung. Die Rücklaufleitung 45 wiederum steht mit einem (nicht dargestellten). Entlastungsraum in Verbindung. Außerdem ist in dem Dämpfungsraum 41 eine Rückstellfeder 47 angeordnet. Die Rückstellfeder 47 ist gegen den Dämpfungskolben 37 vorgespannt.On the side facing away from the combustion chamber of the annular shoulder 33rd is a free end 35 of the valve member shaft 27th educated. The valve member end 35 is located in System against a damper piston 37. The damper piston 37 is reciprocable in a blind bore 39 added. The damper piston 37 limited in the Blind bore 39 a damping chamber 41. The damping chamber 41st is via a throttle bore 43 with a return line 45 in connection. The return line 45 in turn is available one (not shown). Relief room in connection. In addition, in the damping chamber 41, a return spring 47th arranged. The return spring 47 is against the Damping piston 37 biased.

Das in Figur 2 dargestellte zweite Ausführungsbeispiel der Erfindung ähnelt dem in Figur 1 dargestellten ersten Ausführungsbeispiel. Der Einfachheit halber werden deshalb zur Bezeichnung gleicher Teile dieselben Bezugszeichen verwendet. Um Wiederholungen zu vermeiden, wird zudem auf die vorstehende Beschreibung des ersten Ausführungsbeispiels verwiesen. Im Folgenden wird nur auf die Unterschiede zwischen den beiden Ausführungsbeispielen eingegangen.The illustrated in Figure 2 second embodiment of The invention is similar to the first shown in FIG Embodiment. For the sake of simplicity, therefore to denote the same parts the same reference numerals used. In addition, to avoid repetition, is on the above description of the first Reference example. The following is only up the differences between the two embodiments received.

Bei dem in Figur 2 dargestellten zweiten Ausführungsbeispiel der Erfindung wird die Drosselwirkung nicht durch eine Drosselbohrung, sondern durch einen am Dämpfungskolben 37 ausgebildeten Drosselquerschnitt 49 erreicht. D.h., der Dämpfungsraum 41 ist über den Drosselquerschnitt 49 mit der Rücklaufleitung 45 verbunden, die wiederum mit dem (nicht dargestellten) Entlastungsraum in Verbindung steht.In the second shown in Figure 2 Embodiment of the invention is the throttle effect not by a throttle bore, but by an am Damping piston 37 formed throttle cross-section 49th reached. That is, the damping space 41 is above the Throttle cross-section 49 connected to the return line 45, which in turn with the (not shown) discharge space communicates.

Beiden Ausführungsbeispielen ist gemeinsam, dass die Schließbewegung des Ventilgliedes 11 gedämpft wird. Durch die in Figur 2 beispielhaft dargestellte gestufte Ausbildung des Drosselquerschnitts kann der Bewegungsverlauf des Ventilgliedes 11 beim Einspritzen gesteuert werden.Both embodiments have in common that the Closing movement of the valve member 11 is damped. By the stepped in Figure 2 exemplified Training the throttle cross section, the Course of movement of the valve member 11 during injection to be controlled.

Claims (7)

  1. Fuel injection valve for internal combustion engines, with a valve member (11) which is displaceable axially outwards, counter to the force of a closing spring (31), in a bore (9) of a valve body (1) and which, at its end located on the combustion-space side, has a closing head (13) which projects out of the bore and forms a valve-closing member and which, on its side facing the valve body (1), has a valve-sealing surface (15), by means of which the said closing head cooperates with a valve-seat surface (17) arranged on that end face of the valve body (1) which is located on the combustion-space side, and with, on the closing head, at least one injection orifice which emanates from a pressure space (19) and the outlet orifice of which is covered by the valve body (1) in the closing position of the valve member (11) and is released during the outwardly directed opening stroke, and with a hydraulic closure damping device, characterized in that the hydraulic closure damping device (37, 39, 41, 43, 45, 47, 49) comprises a damper piston (37) and a blind bore (39) in a valve-holding body (7), in that the longitudinal axis of the blind bore (39) coincides with the longitudinal axis of the valve member (11), in that the damper piston (37) is guided movably to and fro in the blind bore (39), and in that that end (35) of the valve member (11) which is remote from the combustion space bears against the end face of the damper piston (37).
  2. Fuel injection valve according to Claim 1, characterized in that the guide of the piston (37) in the valve-holding body (7) is pairing-ground.
  3. Fuel injection valve according to Claim 1 or 2, characterized in that the damper piston (37) is prestressed by means of a return spring (47) arranged in the blind bore (39).
  4. Fuel injection valve according to one of the preceding claims, characterized in that the blind bore (39) is filled with hydraulic fluid, in particular oil.
  5. Fuel injection valve according to one of the preceding claims, characterized in that the inner space of the blind bore (39) is connected to a relief space via a throttle (43, 49).
  6. Fuel injection valve according to Claim 5, characterized in that the throttle is formed by a throttle bore (43) in the valve-holding body (7).
  7. Fuel injection valve according to Claim 5, characterized in that the throttle is formed by ground-down surface portions (49) on the piston (37).
EP00952881A 1999-07-02 2000-07-01 Fuel injection valve Expired - Lifetime EP1109998B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19930641 1999-07-02
DE19930641A DE19930641A1 (en) 1999-07-02 1999-07-02 Fuel injector
PCT/DE2000/002148 WO2001002717A1 (en) 1999-07-02 2000-07-01 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1109998A1 EP1109998A1 (en) 2001-06-27
EP1109998B1 true EP1109998B1 (en) 2005-08-10

Family

ID=7913486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00952881A Expired - Lifetime EP1109998B1 (en) 1999-07-02 2000-07-01 Fuel injection valve

Country Status (6)

Country Link
EP (1) EP1109998B1 (en)
JP (1) JP2003530503A (en)
CN (1) CN1316036A (en)
BR (1) BR0006887A (en)
DE (2) DE19930641A1 (en)
WO (1) WO2001002717A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10240879A1 (en) * 2002-09-04 2004-03-18 Robert Bosch Gmbh Fuel injector for injection system for internal combustion engines has injection valve component guided in central bore of injector body inside pair-ground section, and valve element closing central bore is in disc-form
DE10323562A1 (en) * 2003-05-26 2004-12-30 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
DE102004054589B4 (en) * 2004-11-11 2008-09-11 Continental Automotive Gmbh Control valve and injector
JP2006161563A (en) 2004-12-02 2006-06-22 Honda Motor Co Ltd Piston for internal combustion engine
DE102008032133B4 (en) * 2008-07-08 2015-08-20 Continental Automotive Gmbh Fuel injector
CN101592108B (en) * 2009-04-24 2012-05-23 靳北彪 Valve head outer displacement fuel injector for engine
DE102014200757A1 (en) * 2014-01-17 2015-07-23 Robert Bosch Gmbh Gas injector for direct injection of gaseous fuel into a combustion chamber
CN106391593B (en) * 2016-12-10 2019-04-12 无锡银联齿轮传动机械有限公司 The toilet seat of handle pipe cleaning before copper plating machine
CN109253005B (en) * 2017-07-12 2022-08-05 罗伯特·博世有限公司 Oil inlet valve for high-pressure oil pump and corresponding high-pressure oil pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618698A1 (en) * 1996-05-09 1997-11-13 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19642440A1 (en) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
GB2339451A (en) * 1998-07-10 2000-01-26 Lucas Ind Plc A fuel injector with control chamber and a damped needle valve

Also Published As

Publication number Publication date
DE50010916D1 (en) 2005-09-15
JP2003530503A (en) 2003-10-14
EP1109998A1 (en) 2001-06-27
BR0006887A (en) 2001-06-12
WO2001002717A1 (en) 2001-01-11
DE19930641A1 (en) 2001-01-11
CN1316036A (en) 2001-10-03

Similar Documents

Publication Publication Date Title
DE19820513A1 (en) Fuel injection nozzle for internal combustion engine
DE19822671A1 (en) Pressure limiting valve for internal combustion engine
DE10121892A1 (en) Fuel injection valve for internal combustion engines
EP1109998B1 (en) Fuel injection valve
DE19618698A1 (en) Fuel injection valve for internal combustion engines
DE19826791A1 (en) Valve control unit for a fuel injector
DE102006054063A1 (en) fuel injector
DE10114219A1 (en) Fuel injection system has high pressure pump via which fuel injectors are supplied with fuel at high pressure and storage volume arranged immediately before each individual fuel injector
DE10062959A1 (en) Fuel injection valve for internal combustion engines
EP1621759B1 (en) Common Rail Injector
EP0135872B1 (en) Fuel injector for internal-combustion engines
EP1624181B1 (en) Common-Rail Injector
DE827140C (en) Fuel injector
EP1471249B1 (en) Device for damping the closing of an injector needle of a fuel injector
EP0220207A1 (en) Fuel injection nozzle for internal combustion engines.
EP0153494A1 (en) Fuel injection nozzle for internal combustion engines
WO2003004861A1 (en) Fuel injector comprising a force-balanced control valve
DE19930832A1 (en) Fuel injector
EP0137122A2 (en) Fuel injector for internal combustion engines
DE3725618C2 (en) Fuel injection nozzle for internal combustion engines
EP4077908B1 (en) Injection nozzle for injecting fuel under high pressure
EP0826878B1 (en) Fuel injector for internal combustion engines
DE3410476A1 (en) Fuel injection nozzle for internal combustion engines
DE102013211658A1 (en) Fuel Einspritzinjektor
DE10003252A1 (en) Injector

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20010711

17Q First examination report despatched

Effective date: 20040206

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50010916

Country of ref document: DE

Date of ref document: 20050915

Kind code of ref document: P

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20050810

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

26N No opposition filed

Effective date: 20060511

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060811

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070201

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050810