EP0726385B1 - Device for supplying a pressure fluid to an intake valve for combustion chamber in an internal combustion engine - Google Patents

Device for supplying a pressure fluid to an intake valve for combustion chamber in an internal combustion engine Download PDF

Info

Publication number
EP0726385B1
EP0726385B1 EP95114166A EP95114166A EP0726385B1 EP 0726385 B1 EP0726385 B1 EP 0726385B1 EP 95114166 A EP95114166 A EP 95114166A EP 95114166 A EP95114166 A EP 95114166A EP 0726385 B1 EP0726385 B1 EP 0726385B1
Authority
EP
European Patent Office
Prior art keywords
valve
inlet
shaft
valve head
arrangement according
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
EP95114166A
Other languages
German (de)
French (fr)
Other versions
EP0726385A1 (en
Inventor
Assadollah Dipl.-Ing. Awarzamani
Thomas Dipl.-Ing. Wilfert
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 EP0726385A1 publication Critical patent/EP0726385A1/en
Application granted granted Critical
Publication of EP0726385B1 publication Critical patent/EP0726385B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group

Definitions

  • the invention is based on an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine according to the genus of Claim 1.
  • an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine is known (JP-A-59-158 363), the inlet valve having a valve disk and a massive shaft, to which air under pressure in one Cavity between the stem and a valve guide sleeve.
  • the air is supplied to the side of the shaft via the Connection, the air outlet at a the combustion chamber facing end of the valve guide sleeve is provided.
  • the known valve is solid and has no cavity.
  • an inlet valve is known from US 1,799,397, that has a valve disc and a hollow stem with one Has a cavity through which a medium can flow.
  • Medium is fuel that is only in liquid Form is present.
  • the liquid fuel gets over at least one inlet shaft opening provided in the shaft the cavity and at least one on the combustion chamber the side of the intake valve facing away from the internal combustion engine provided outlet then into the combustion chamber.
  • the delivery of the liquid fuel via the at least one Exhaust opening is said to improve combustion in the Run idle when the engine is cold and take place in addition to the intended fuel delivery in a Intake pipe of the internal combustion engine by means of a carburetor.
  • An indication of avoiding condensation from The fuel on the valve plate of the injection valve is that recognized state of the art not removable.
  • From DE-OS 36 00 067 is also an inlet valve known, which has a hollow shaft in which a Exhaust valve is slidably mounted.
  • the exhaust valve has an exhaust valve plate, part of a Inlet valve plate of the inlet valve is of the type that in the closed position of the exhaust valve Exhaust valve disc flush with the intake valve disc completes.
  • Internal combustion engine trapped exhaust gases over the hollow Drain the inlet valve stem from the combustion chamber.
  • the Exhaust gases flow out of the hollow stem of the intake valve from several outlet openings, which are slit-shaped except an outer surface of the hollow shaft are.
  • the outlet valve is closed to over the open inlet valve Intake fuel-air mixture from an inlet duct.
  • the fuel-air mixture is usually from one
  • the fuel injector processes the fuel in Form of a jet of fuel towards the inlet valve delivers.
  • the one leaving the fuel injector Fuel breaks down into the finest droplets of fuel to produce the most homogeneous fuel-air mixture possible. It can, especially when cold Internal combustion engine or in the event of sudden load changes a condensation of the fuel droplets on the inner walls the inlet duct, on the inner walls of the combustion chamber and come in particular on the valve plate of the inlet valve, wherein a wall film of fuel forms. From a Such wall film can only be relatively large Detach fuel drops, which then become one in the combustion chamber locally over-greased fuel-air mixture. A over-greased fuel-air mixture only burns incomplete so that the portion becomes more harmful Components in the exhaust gas increased accordingly.
  • claim 1 has the advantage that a condensation of the for example from a fuel injector dispensed fuel, especially on the valve plate of the Intake valve is avoided.
  • the inlet valve according to the invention opposite the prior art has an increased life.
  • the drawing shows a partial sectional view Inlet valve 1 designed according to the invention, which in particular for a mixture-compressing, spark-ignited Internal combustion engine is provided.
  • the inlet valve 1 is in a cylinder head 3 of the internal combustion engine and for example in a valve guide sleeve 7 slidably mounted.
  • the inlet valve 1 has one Valve plate 12, which is a combustion chamber 20 of the Flat valve closing surface 17 facing the internal combustion engine and a valve disk surface 14 facing away from the combustion chamber 20 Has.
  • the valve plate surface 14 merges into one cylindrical stem 9 of the inlet valve 1 over, the an actuation end, not shown, outside the Cylinder head 3 ends.
  • To actuate the inlet valve 1 engages in a known manner at the actuating end of the shaft 9 For example, a rocker arm that the inlet valve 1 in a Open and by means of a valve spring in a closed position brings back.
  • the inlet valve 1 is in its drawing Shown closed position, in which an annular Section of the valve plate surface 14 on a for example conical valve seat 15 is present.
  • the valve seat 15 is, for example, from a sleeve-shaped valve insert 16 formed, for example by means of a press fit in the cylinder head 3 is introduced.
  • Valve disc surface 14 becomes a flow connection released, the one via the open inlet valve 1 Inlet duct 18 with the combustion chamber 20 of the internal combustion engine connects.
  • the inlet channel 18 is, for example, via a sealing ring 11 connected to an intake pipe 22 of the internal combustion engine.
  • the inlet valve 1 opens at the bottom directed movement of a displaceable in the combustion chamber 20 Piston, taking air through the intake pipe 22 from the environment is sucked in.
  • the intake air is, for example, in the Intake pipe 22 fuel mixed to the next Combustion in the combustion chamber 20 is an ignitable fuel-air mixture to obtain.
  • Fuel injector 24 provided on the intake manifold 22 is attached to the fuel in the form of a more or less bundled, for example conical Fuel jet 25 in the direction of the inlet valve 1 in the Suction pipe 22 and the inlet channel 18 to deliver. That in the Drawing only partially shown
  • Fuel injector 24 is for fuel supply for example via a fuel distributor (a so-called fuel rail) on a fuel feed pump 26 connected that the fuel from a Fuel tank 27 promotes.
  • the fuel discharged from the fuel injection valve 3 disintegrates downstream of the fuel injector 24 in finest fuel droplets, which are in the intake pipe 22 and mix in the inlet duct 18 with the flowing air so that the most homogeneous fuel-air mixture possible.
  • the fuel-air mixture flows with the inlet valve open 1 in the combustion chamber 20, is ignited and burns there with the inlet valve closed 1.
  • the Fuel injector 24 dispensed fuel Walls of the intake pipe 22, on walls of the inlet duct 18, on the inner walls of the combustion chamber 20 and in particular on Inlet valve 1 on the valve plate surface 14 prevented become.
  • the inlet valve 1 has a stem 9, which is not solid according to the invention, but has a cavity 28 in its interior.
  • the cavity 28 has an elongated shape and is, for example, by Except drilling from the shaft 9.
  • the cavity 28 extends from a transition region 31 between valve plate surface 14 and shaft 9 in the direction a longitudinal valve axis 5 of the inlet valve 1 and ends in closed state of the inlet valve 1 in the Valve guide sleeve 7.
  • the shaft 9 has at least one Inlet shaft opening 30, which is from an outer lateral surface 34 of the shaft 9 leads into the cavity 28.
  • the Valve guide sleeve 7 also has an opening 36 which from an inner surface 37 to an outer surface 38 of the Valve guide sleeve 7 leads.
  • the valve guide opening 36 is, for example, by drilling from the valve guide sleeve 7 excluded and extends, for example, across Longitudinal valve axis 5 of the intake valve 1. Die Valve guide opening 36 of the valve guide sleeve 7 is over a corresponding cylinder opening 40 in the cylinder head 3 connected to a pressure line 41.
  • the pressure line 41 is with an electromagnetically actuated one, for example Two-way valve 44 connected.
  • the two-way valve 44 is via a connection pressure line 42 to a compressed air tank 45 connected.
  • the compressed air tank 45 is a Compressed air tank line 46 to one, for example Pump device 47 connected.
  • the pump device 47 is for example in the form of a diaphragm driven air pump formed in which the in a crankcase Internal combustion engine by a piston due to its opening and closing Downward movements created pressure fluctuations for pumping a gaseous medium, in particular air become.
  • the compressed air tank 45 can while running Internal combustion engine in certain operating areas from the Pump device 47 can be refilled with air to the Compressed air supply sufficient compressed air in the To provide compressed air tank 45.
  • In the open position of the Two-way valve 44 is from the compressed air tank 45 provided pressure via the connection pressure line 42, the Pressure line 41 and via the cylinder opening 40 on the Valve guide opening 36 of the valve guide sleeve 7.
  • Valve guide opening 36 is closer to the combustion chamber 20 than this is the case with the inlet shaft opening 30 of the shaft 9 is.
  • at least one outlet opening 50 am Valve plate 12 is provided, for example, transverse to Valve longitudinal axis 5 excluded from the valve plate surface 14 is to provide fluid communication with the cavity 28 of the To produce shaft 9.
  • Openings 30, 36 overflow compressed air from pressure vessel 45 the connection pressure line 42, the open two-way valve 44 in the pressure line 41 and over the Cylinder opening 40 in the valve guide opening 36 in the Cavity 28 and via the at least one outlet opening 50 out of the valve plate surface 14 again.
  • a plurality of inlet shaft openings 30 on the periphery of the outer Shell surface 34 of the shaft 9 is provided, so that at a rotation of the inlet valve 1 a flow connection the valve guide opening 36 with at least one of the multiple inlet shaft openings 30 is present. It is also conceivable on the circumference of the outer surface 38 of the Valve guide sleeve 7 a plurality of valve guide openings 36 to be provided, for example with several, slot-shaped inlet shaft openings 30 correspond to always in the open position of the inlet valve 1 Flow connection from the compressed air tank 45 to To produce outlet opening 50 of the inlet valve 1. It is also possible that in the region of the valve guide opening 36 the inner surface 37 is formed with a circumferential groove which in the open position, the inlet shaft opening 30 in can cover any rotational position of the inlet valve 1.
  • outlet openings 50 in the transition region 31 It is also possible to replace or in addition to the outlet openings 50 in the transition region 31 to provide further outlet openings 50, for example from the valve plate surface 14 or from the outer Shell surface 34 of the shaft 9, in particular near the Valve plates 12 are excluded.
  • the arrangement of the Outlet openings 50 can also be made such that a A large number of outlet openings 50 are sieve-shaped Hole valve plate surface 14. The from the multitude of Compressed air outlet openings 50 creates one particularly even air film, which then the whole Valve plate surface 14 surrounds with the valve plate 12.
  • valve plate surface 14 it is also possible to use the valve plate surface 14 to form a rough surface which the from a Outlet opening 50 or, for example, several Outlet openings 50 escaping compressed air on the rough Swirled surface so that an air flow around the Forms valve plate 12 around.
  • the making of a rough surface of the valve plate surface 14 can for example by a sintering process in which a metal layer is applied to the valve plate surface 14 to create a rough surface.
  • the outlet openings 50 and the rough surface of the Valve plate surface 14 it is also possible to use the inlet valve 1 to form two parts, one part for example the stem 9 and part of the valve plate 12, after the separate machining of shaft 9 and Valve plate 12 can be reassembled.
  • the blowing out of the compressed air at the inlet valve 1 is especially during the cold start phase and the subsequent warm-up phase and in certain Operating areas of the internal combustion engine are provided.
  • the time of the compressed air supply is dependent on the one hand selected distance of the at least one valve guide opening 36 to at least one inlet shaft opening 30 and on the other hand controllable by the two-way valve 44.
  • the two-way valve 44 is for this purpose, for example, via an electrical Connection line 52 to an electronic control unit 53 connected that only in certain operating areas, especially in the cold start phase of the internal combustion engine, brings the two-way valve 44 into an open position Blow out compressed air from inlet valve 1.
  • the Compressed air supply is particularly during the first 120 Provided seconds after starting the internal combustion engine.
  • valve plate surface 14 of the valve plate 12 released compressed air also causes an improved Mixing that emitted by the fuel injector 24 Fuel, especially in the combustion chamber 20, takes place. This leads to an optimal combustion of the fuel in the Combustion chamber 20, which also increases fuel consumption Internal combustion engine reduced. Furthermore, the im Cavity 28 flowing out of the valve plate 12 escaping compressed air cooling the inlet valve 1, so that its thermal load, especially at full load the internal combustion engine, is reduced, which results in other increases the life of the inlet valve 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Anordnung zur Zufuhr von unter Druck stehendem gasförmigen Medium zu einem Einlaßventil für einen Brennraum einer Brennkraftmaschine nach der Gattung des Anspruchs 1. Es ist bereits eine Anordnung zur Zufuhr von unter Druck stehendem gasförmigen Medium zu einem Einlaßventil für einen Brennraum einer Brennkraftmaschine bekannt (JP-A-59-158 363), wobei das Einlaßventil einen Ventilteller und einen massiven Schaft hat, zu welchem Luft unter Druck in einem Hohlraum zwischen Schaft und einer Ventilführungshülse gelangt. Die Luftzufuhr erfolgt seitlich des Schaftes über die Verbindung, wobei der Luftaustritt an einem dem Brennraum zugewandten Ende der Ventilführungshülse vorgesehen ist. Das bekannte Ventil ist massiv und besitzt keinen Hohlraum. Der Austritt der Luft erfolgt in geöffnetem Zustand des Ventils am Ende der Ventilführungshülse, also relativ weit entfernt zur Ventiltellerfläche. Außerdem ist am Schaft eine Ringwulst ausgebildet, welche einen Dichtsitz an der Ventilführungshülse bildet. Diese Ringwulst bewirkt jedoch, daß es zu einer weiteren Ablenkung der aus der Ventilführungshülse austretenden Luft weg von der Ventiltellerfläche des Ventils kommt. All dies hat zur Folge, daß es zu keiner Ausbildung eines Luftfilms um den Ventilteller kommen kann, mittels dem eine Rückkondensation des Brennstoffs vermieden werden soll.The invention is based on an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine according to the genus of Claim 1. There is already an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine is known (JP-A-59-158 363), the inlet valve having a valve disk and a massive shaft, to which air under pressure in one Cavity between the stem and a valve guide sleeve. The air is supplied to the side of the shaft via the Connection, the air outlet at a the combustion chamber facing end of the valve guide sleeve is provided. The known valve is solid and has no cavity. Of the The air escapes when the valve is open on End of the valve guide sleeve, so relatively far from Valve disc area. There is also a ring bead on the shaft formed which has a sealing seat on the valve guide sleeve forms. However, this ring bead causes it to become another Deflection of the air emerging from the valve guide sleeve comes from the valve disc surface of the valve. All of this has to Consequence that there is no formation of an air film around the Valve plate can come, by means of a back condensation of the Fuel should be avoided.

Ferner ist aus der US 1,799,397 ein Einlaßventil bekannt, das einen Ventilteller und einen hohlen Schaft mit einem Hohlraum hat, durch welchen ein Medium strömen kann. Bei dem Medium handelt es sich um Brennstoff, der nur in flüssiger Form vorliegt. Der flüssige Brennstoff gelangt über zumindest eine im Schaft vorgesehene Einlaßschaftöffnung in den Hohlraum und aus zumindest einer an einer dem Brennraum der Brennkraftmaschine abgewandten Seite des Einlaßventils vorgesehenen Auslaßöffnung anschließend in den Brennraum. Die Abgabe des flüssigen Brennstoffs über die zumindest eine Auslaßöffnung soll zu einer Verbesserung der Verbrennung im Leerlauf bei kalter Brennkraftmaschine führen und erfolgt zusätzlich zur vorgesehenen Brennstoffabgabe in ein Ansaugrohr der Brennkraftmaschine mittels eines Vergasers. Ein Hinweis auf eine Vermeidung einer Kondensation von Brennstoff am Ventilteller des Einspritzventils ist dem gewürdigten Stand der Technik nicht entnehmbar.Furthermore, an inlet valve is known from US 1,799,397, that has a valve disc and a hollow stem with one Has a cavity through which a medium can flow. In which Medium is fuel that is only in liquid Form is present. The liquid fuel gets over at least one inlet shaft opening provided in the shaft the cavity and at least one on the combustion chamber the side of the intake valve facing away from the internal combustion engine provided outlet then into the combustion chamber. The delivery of the liquid fuel via the at least one Exhaust opening is said to improve combustion in the Run idle when the engine is cold and take place in addition to the intended fuel delivery in a Intake pipe of the internal combustion engine by means of a carburetor. An indication of avoiding condensation from The fuel on the valve plate of the injection valve is that recognized state of the art not removable.

Aus der DE-OS 36 00 067 ist außerdem ein Einlaßventil bekannt, das einen hohlen Schaft aufweist, in welchem ein Auslaßventil verschiebbar gelagert ist. Das Auslaßventil besitzt einen Auslaßventilteller, der Teil eines Einlaßventiltellers des Einlaßventils ist, und zwar der Art, daß in Schließstellung des Auslaßventils der Auslaßventilteller bündig mit dem Einlaßventilteller abschließt. In Offenstellung des Auslaßventils ist der Auslaßventilteller vom Einlaßventilteller abgehoben, um die nach der Verbrennung in einem Brennraum der Brennkraftmaschine eingeschlossenen Abgase über den hohlen Schaft des Einlaßventils aus dem Brennraum abzuführen. Die Abgase strömen dabei aus dem hohlen Schaft des Einlaßventils aus mehreren Auslaßöffnungen aus, die schlitzförmig aus einer äußeren Mantelfläche des hohlen Schaftes ausgenommen sind. Bei geöffnetem Einlaßventil ist das Auslaßventil geschlossen, um über das offene Einlaßventil hinweg ein Brennstoff-Luft-Gemisch aus einem Einlaßkanal anzusaugen.From DE-OS 36 00 067 is also an inlet valve known, which has a hollow shaft in which a Exhaust valve is slidably mounted. The exhaust valve has an exhaust valve plate, part of a Inlet valve plate of the inlet valve is of the type that in the closed position of the exhaust valve Exhaust valve disc flush with the intake valve disc completes. In the open position of the exhaust valve Exhaust valve plate lifted from the inlet valve plate to the after combustion in a combustion chamber Internal combustion engine trapped exhaust gases over the hollow Drain the inlet valve stem from the combustion chamber. The Exhaust gases flow out of the hollow stem of the intake valve from several outlet openings, which are slit-shaped except an outer surface of the hollow shaft are. When the inlet valve is open, the outlet valve is closed to over the open inlet valve Intake fuel-air mixture from an inlet duct.

Das Brennstoff-Luft-Gemisch wird üblicherweise von einem Brennstoffeinspritzventil aufbereitet, das den Brennstoff in Form eines Brennstoffstrahls in Richtung des Einlaßventils abgibt. Der das Brennstoffeinspritzventil verlassende Brennstoff zerfällt dabei in feinste Brennstofftröpfchen, um ein möglichst homogenes Brennstoff-Luft-Gemisch zu erzeugen. Dabei kann es, insbesondere im kalten Zustand der Brennkraftmaschine oder bei plötzlichen Lastwechseln, zu einer Kondensation der Brennstofftröpfchen an Innenwandungen des Einlaßkanals, an Innenwänden des Brennraums und insbesondere am Ventilteller des Einlaßventils kommen, wobei sich ein Wandfilm aus Brennstoff bildet. Aus einem derartigen Wandfilm können sich nur relativ große Brennstofftropfen ablösen, die dann im Brennraum zu einem lokal überfetteten Brennstoff-Luft-Gemisch führen. Ein überfettetes Brennstoff-Luft-Gemisch verbrennt jedoch nur unvollständig, so daß sich der Anteil schädlicher Bestandteile im Abgas dementsprechend erhöht.The fuel-air mixture is usually from one The fuel injector processes the fuel in Form of a jet of fuel towards the inlet valve delivers. The one leaving the fuel injector Fuel breaks down into the finest droplets of fuel to produce the most homogeneous fuel-air mixture possible. It can, especially when cold Internal combustion engine or in the event of sudden load changes a condensation of the fuel droplets on the inner walls the inlet duct, on the inner walls of the combustion chamber and come in particular on the valve plate of the inlet valve, wherein a wall film of fuel forms. From a Such wall film can only be relatively large Detach fuel drops, which then become one in the combustion chamber locally over-greased fuel-air mixture. A over-greased fuel-air mixture only burns incomplete so that the portion becomes more harmful Components in the exhaust gas increased accordingly.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung zur Zufuhr von unter Druck stehendem gasförmigen Medium zu einem Einlaßventil für einen Brennraum einer Brennkraftmaschine mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß auf einfache Art und Weise eine Kondensation des beispielsweise von einem Brennstoffeinspritzventil abgegebenen Brennstoffs, insbesondere am Ventilteller des Einlaßventils, vermieden wird. Vorteilhafterweise wird dadurch eine insbesondere während eines Kaltstarts und der nachfolgenden Warmlaufphase sowie bei bestimmten Betriebsbereichen der Brennkraftmaschine ansonsten stattfindende Erhöhung der schädlichen Bestandteile im Abgas verhindert. Darüber hinaus verringert sich mit dem erfindungsgemäß ausgebildeten Einlaßventil auch der Brennstoffverbrauch der Brennkraftmaschine. Von Vorteil ist ebenfalls, daß das erfindungsgemäße Einlaßventil gegenüber dem Stand der Technik eine erhöhte Lebensdauer aufweist.The arrangement according to the invention for the supply of pressure standing gaseous medium to an inlet valve for one Combustion chamber of an internal combustion engine with the characteristic ones Features of claim 1 has the advantage that a condensation of the for example from a fuel injector dispensed fuel, especially on the valve plate of the Intake valve is avoided. Advantageously thereby one especially during a cold start and the subsequent warm-up phase and certain Operating areas of the internal combustion engine otherwise increase in harmful components in the exhaust gas prevented. It also decreases with that Intake valve designed according to the invention also the Fuel consumption of the internal combustion engine. Is an advantage also that the inlet valve according to the invention opposite the prior art has an increased life.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Anordnung möglich.By the measures listed in the subclaims advantageous developments and improvements in Claim 1 specified arrangement possible.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is in the drawing shown in simplified form and in the following Description explained in more detail.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die Zeichnung zeigt in teilweiser Schnittdarstellung ein erfindungsgemäß gestaltetes Einlaßventil 1, das insbesondere für eine gemischverdichtende, fremdgezündete Brennkraftmaschine vorgesehen ist. Das Einlaßventil 1 ist in einem Zylinderkopf 3 der Brennkraftmaschine untergebracht und beispielsweise in einer Ventilführungshülse 7 verschiebbar gelagert. Das Einlaßventil 1 besitzt einen Ventilteller 12, der eine einem Brennraum 20 der Brennkraftmaschine zugewandte, ebene Ventilschließfläche 17 und eine dem Brennraum 20 abgewandte Ventiltellerfläche 14 hat. Die Ventiltellerfläche 14 geht mit Krümmung in einen zylindrischen Schaft 9 des Einlaßventils 1 über, der an einem nicht näher dargestellten Betätigungsende außerhalb des Zylinderkopfes 3 endet. Zur Betätigung des Einlaßventils 1 greift in bekannter Weise am Betätigungsende des Schaftes 9 beispielsweise ein Kipphebel an, der das Einlaßventil 1 in eine Offen- und mittels einer Ventilfeder in eine Schließstellung zurückbringt. The drawing shows a partial sectional view Inlet valve 1 designed according to the invention, which in particular for a mixture-compressing, spark-ignited Internal combustion engine is provided. The inlet valve 1 is in a cylinder head 3 of the internal combustion engine and for example in a valve guide sleeve 7 slidably mounted. The inlet valve 1 has one Valve plate 12, which is a combustion chamber 20 of the Flat valve closing surface 17 facing the internal combustion engine and a valve disk surface 14 facing away from the combustion chamber 20 Has. The valve plate surface 14 merges into one cylindrical stem 9 of the inlet valve 1 over, the an actuation end, not shown, outside the Cylinder head 3 ends. To actuate the inlet valve 1 engages in a known manner at the actuating end of the shaft 9 For example, a rocker arm that the inlet valve 1 in a Open and by means of a valve spring in a closed position brings back.

Das Einlaßventil 1 ist in der Zeichnung in seiner Schließstellung dargestellt, bei der ein ringförmiger Abschnitt der Ventiltellerfläche 14 an einem beispielsweise konisch ausgebildeten Ventilsitz 15 anliegt. Der Ventilsitz 15 wird zum Beispiel von einem hülsenförmigen Ventileinsatz 16 gebildet, der beispielsweise mittels einer Preßpassung in den Zylinderkopf 3 eingebracht ist. In Offenstellung des Einlaßventils 1 mit vom Ventilsitz 15 abgehobener Ventiltellerfläche 14 wird eine Strömungsverbindung freigegeben, die über das offene Einlaßventil 1 einen Einlaßkanal 18 mit dem Brennraum 20 der Brennkraftmaschine verbindet.The inlet valve 1 is in its drawing Shown closed position, in which an annular Section of the valve plate surface 14 on a for example conical valve seat 15 is present. The valve seat 15 is, for example, from a sleeve-shaped valve insert 16 formed, for example by means of a press fit in the cylinder head 3 is introduced. In the open position of the Inlet valve 1 with lifted off the valve seat 15 Valve disc surface 14 becomes a flow connection released, the one via the open inlet valve 1 Inlet duct 18 with the combustion chamber 20 of the internal combustion engine connects.

Der Einlaßkanal 18 ist beispielsweise über einen Dichtring 11 mit einem Ansaugrohr 22 der Brennkraftmaschine verbunden. Das Einlaßventil 1 öffnet bekanntermaßen bei der nach unten gerichteten Bewegung eines im Brennraum 20 verschiebbaren Kolbens, wobei Luft über das Ansaugrohr 22 aus der Umgebung angesaugt wird. Der angesaugten Luft wird beispielsweise im Ansaugrohr 22 Brennstoff zugemischt, um zur nachfolgenden Verbrennung im Brennraum 20 ein zündfähiges Brennstoff-Luft-Gemisch zu erhalten. Zur Brennstoffaufbereitung ist beispielsweise ein elektromagnetisch betätigbares Brennstoffeinspritzventil 24 vorgesehen, das am Ansaugrohr 22 angebracht ist, um den Brennstoff in Form eines mehr oder weniger gebündelten, beispielsweise kegelförmigen Brennstoffstrahls 25 in Richtung des Einlaßventils 1 in das Ansaugrohr 22 und den Einlaßkanal 18 abzugeben. Das in der Zeichnung nur teilweise dargestellte Brennstoffeinspritzventil 24 ist zur Brennstoffversorgung beispielsweise über einen Brennstoffverteiler (ein sogenanntes Fuel-Rail) an einer Brennstofförderpumpe 26 angeschlossen, die den Brennstoff aus einem Brennstoffbehälter 27 fördert. The inlet channel 18 is, for example, via a sealing ring 11 connected to an intake pipe 22 of the internal combustion engine. As is known, the inlet valve 1 opens at the bottom directed movement of a displaceable in the combustion chamber 20 Piston, taking air through the intake pipe 22 from the environment is sucked in. The intake air is, for example, in the Intake pipe 22 fuel mixed to the next Combustion in the combustion chamber 20 is an ignitable fuel-air mixture to obtain. For fuel processing is for example an electromagnetically actuated one Fuel injector 24 provided on the intake manifold 22 is attached to the fuel in the form of a more or less bundled, for example conical Fuel jet 25 in the direction of the inlet valve 1 in the Suction pipe 22 and the inlet channel 18 to deliver. That in the Drawing only partially shown Fuel injector 24 is for fuel supply for example via a fuel distributor (a so-called fuel rail) on a fuel feed pump 26 connected that the fuel from a Fuel tank 27 promotes.

Der vom Brennstoffeinspritzventil 3 abgegebene Brennstoff zerfällt stromabwärts des Brennstoffeinspritzventils 24 in feinste Brennstofftröpfchen, die sich im Ansaugrohr 22 und im Einlaßkanal 18 mit der strömenden Luft vermischen, so daß ein möglichst homogenes Brennstoff-Luft-Gemisch entsteht. Das Brennstoff-Luft-Gemisch strömt bei offenem Einlaßventil 1 in den Brennraum 20 ein, wird gezündet und verbrennt dort bei geschlossenem Einlaßventil 1. Um insbesondere in der Kaltstartphase und der nachfolgenden Warmlaufphase sowie bei bestimmten Betriebsbereichen der Brennkraftmaschine eine möglichst vollständige Verbrennung des Brennstoff-Luft-Gemisches zu erhalten, muß ein Kondensieren des vom Brennstoffeinspritzventil 24 abgegebenen Brennstoffs an Wänden des Ansaugrohres 22, an Wänden des Einlaßkanals 18, an Innenwänden des Brennraums 20 und insbesondere am Einlaßventil 1 an der Ventiltellerfläche 14 verhindert werden. Hierzu besitzt das Einlaßventil 1 einen Schaft 9, der erfindungsgemäß nicht massiv ausgebildet ist, sondern einen Hohlraum 28 in seinem Inneren aufweist. Der Hohlraum 28 hat eine längliche Form und ist beispielsweise durch Bohren aus dem Schaft 9 ausgenommen. Der Hohlraum 28 erstreckt sich ausgehend von einem Übergangsbereich 31 zwischen Ventiltellerfläche 14 und Schaft 9 in Richtung einer Ventillängsachse 5 des Einlaßventils 1 und endet im geschlossenen Zustand des Einlaßventils 1 in der Ventilführungshülse 7.The fuel discharged from the fuel injection valve 3 disintegrates downstream of the fuel injector 24 in finest fuel droplets, which are in the intake pipe 22 and mix in the inlet duct 18 with the flowing air so that the most homogeneous fuel-air mixture possible. The fuel-air mixture flows with the inlet valve open 1 in the combustion chamber 20, is ignited and burns there with the inlet valve closed 1. In particular in the Cold start phase and the subsequent warm-up phase and at certain operating areas of the internal combustion engine complete combustion of the fuel-air mixture to get a condensation of the Fuel injector 24 dispensed fuel Walls of the intake pipe 22, on walls of the inlet duct 18, on the inner walls of the combustion chamber 20 and in particular on Inlet valve 1 on the valve plate surface 14 prevented become. For this purpose, the inlet valve 1 has a stem 9, which is not solid according to the invention, but has a cavity 28 in its interior. The cavity 28 has an elongated shape and is, for example, by Except drilling from the shaft 9. The cavity 28 extends from a transition region 31 between valve plate surface 14 and shaft 9 in the direction a longitudinal valve axis 5 of the inlet valve 1 and ends in closed state of the inlet valve 1 in the Valve guide sleeve 7.

An einem in der Ventilführungshülse 7 gelegenen Endbereich 29 des Hohlraums 28 besitzt der Schaft 9 zumindest eine Einlaßschaftöffnung 30, die von einer äußeren Mantelfläche 34 des Schaftes 9 in den Hohlraum 28 führt. Die Ventilführungshülse 7 besitzt ebenfalls eine Öffnung 36, die von einer Innenfläche 37 zu einer Außenfläche 38 der Ventilführungshülse 7 führt. Die Ventilführungsöffnung 36 ist beispielsweise durch Bohren aus der Ventilführungshülse 7 ausgenommen und erstreckt sich zum Beispiel quer zur Ventillängsachse 5 des Einlaßventils 1. Die Ventilführungsöffnung 36 der Ventilführungshülse 7 ist über eine korrespondierende Zylinderöffnung 40 im Zylinderkopf 3 mit einer Druckleitung 41 verbunden. Die Druckleitung 41 ist mit einem beispielsweise elektromagnetisch betätigbaren Zweiwege-Ventil 44 verbunden. Das Zweiwege-Ventil 44 ist über eine Anschlußdruckleitung 42 an einen Druckluftbehälter 45 angeschlossen. Der Druckluftbehälter 45 ist über eine Druckluftbehälterleitung 46 zum Beispiel an eine Pumpvorrichtung 47 angeschlossen. Die Pumpvorrichtung 47 ist beispielsweise in Form einer membranangetriebenen Luftpumpe ausgebildet, bei der die in einem Kurbelwellengehäuse der Brennkraftmaschine von einem Kolben durch seine Auf- und Abwärtsbewegungen erzeugten Druckschwankungen zum Pumpen eines gasförmigen Mediums, insbesondere von Luft, ausgenutzt werden. Der Druckluftbehälter 45 kann bei laufender Brennkraftmaschine in bestimmten Betriebsbereichen von der Pumpvorrichtung 47 mit Luft nachgefüllt werden, um zur Druckluftversorgung ausreichend Druckluft im Druckluftbehälter 45 bereitzustellen. In Offenstellung des Zweiwege-Ventils 44 steht der vom Druckluftbehälter 45 bereitgestellte Druck über die Anschlußdruckleitung 42, die Druckleitung 41 und über die Zylinderöffnung 40 an der Ventilführungsöffnung 36 der Ventilführungshülse 7 an.At an end region located in the valve guide sleeve 7 29 of the cavity 28, the shaft 9 has at least one Inlet shaft opening 30, which is from an outer lateral surface 34 of the shaft 9 leads into the cavity 28. The Valve guide sleeve 7 also has an opening 36 which from an inner surface 37 to an outer surface 38 of the Valve guide sleeve 7 leads. The valve guide opening 36 is, for example, by drilling from the valve guide sleeve 7 excluded and extends, for example, across Longitudinal valve axis 5 of the intake valve 1. Die Valve guide opening 36 of the valve guide sleeve 7 is over a corresponding cylinder opening 40 in the cylinder head 3 connected to a pressure line 41. The pressure line 41 is with an electromagnetically actuated one, for example Two-way valve 44 connected. The two-way valve 44 is via a connection pressure line 42 to a compressed air tank 45 connected. The compressed air tank 45 is a Compressed air tank line 46 to one, for example Pump device 47 connected. The pump device 47 is for example in the form of a diaphragm driven air pump formed in which the in a crankcase Internal combustion engine by a piston due to its opening and closing Downward movements created pressure fluctuations for pumping a gaseous medium, in particular air become. The compressed air tank 45 can while running Internal combustion engine in certain operating areas from the Pump device 47 can be refilled with air to the Compressed air supply sufficient compressed air in the To provide compressed air tank 45. In the open position of the Two-way valve 44 is from the compressed air tank 45 provided pressure via the connection pressure line 42, the Pressure line 41 and via the cylinder opening 40 on the Valve guide opening 36 of the valve guide sleeve 7.

Wie in der Zeichnung dargestellt ist, ist in Schließstellung des Einlaßventils 1 ein axialer Abstand von der Ventilführungsöffnung 36 der Ventilführungshülse 7 zur Einlaßschaftöffnung 30 des Schaftes 9 vorhanden, wobei die Ventilführungsöffnung 36 näher am Brennraum 20 liegt, als dies bei der Einlaßschaftöffnung 30 des Schaftes 9 der Fall ist. Weiterhin ist im Übergangsbereich 31 zwischen Schaft 9 und Ventiltellerfläche 14 zumindest eine Auslaßöffnung 50 am Ventilteller 12 vorgesehen, die beispielsweise quer zur Ventillängsachse 5 aus der Ventiltellerfläche 14 ausgenommen ist, um eine Strömungsverbindung mit dem Hohlraum 28 des Schaftes 9 herzustellen. Der axiale Abstand der Ventilführungsöffnung 36 zur Einlaßschaftöffnung 30 sowie deren Öffnungsquerschnitte sind derart gewählt, daß es beim Übergang von der Schließstellung in die Offenstellung des Einlaßventils 1, insbesondere im Bereich der maximalen Offenstellung des Einlaßventils 1, zu einer Überdeckung der Einlaßschaftöffnung 30 mit der Ventilführungsöffnung 36 kommt, die in maximaler Offenstellung des Einlaßventil 1 vollständig ineinander münden. Bei sich überdeckenden Öffnungen 30, 36 strömt Druckluft vom Druckbehälter 45 über die Anschlußdruckleitung 42, das offen geschaltete Zweiwege-Ventil 44 in die Druckleitung 41 und über die Zylinderöffnung 40 in die Ventilführungsöffnung 36 in den Hohlraum 28 ein und über die zumindest eine Auslaßöffnung 50 aus der Ventiltellerfläche 14 wieder aus. Vorzugsweise sind mehrere Einlaßschaftöffnungen 30 am Umfang der äußeren Mantelfläche 34 des Schaftes 9 vorgesehen, so daß auch bei einer Rotation des Einlaßventils 1 eine Strömungsverbindung der Ventilführungsöffnung 36 mit zumindest einer der mehreren Einlaßschaftöffnungen 30 vorhanden ist. Es ist auch denkbar, am Umfang der Außenfläche 38 der Ventilführungshülse 7 mehrere Ventilführungsöffnungen 36 vorzusehen, die dann mit beispielsweise mehreren, schlitzförmigen Einlaßschaftöffnungen 30 korrespondieren, um in Offenstellung des Einlaßventils 1 stets eine Strömungsverbindung vom Druckluftbehälter 45 zur Auslaßöffnung 50 des Einlaßventils 1 herzustellen. Es ist auch möglich, daß im Bereich der Ventilführungsöffnung 36 an der Innenfläche 37 eine umlaufende Nut ausgebildet ist, mit der sich in Offenstellung die Einlaßschaftöffnung 30 in jeder Drehstellung des Einlaßventils 1 überdecken kann. As shown in the drawing, is in the closed position of the inlet valve 1 an axial distance from the Valve guide opening 36 of the valve guide sleeve 7 for Inlet shaft opening 30 of the shaft 9 is present, the Valve guide opening 36 is closer to the combustion chamber 20 than this is the case with the inlet shaft opening 30 of the shaft 9 is. Furthermore, in the transition area 31 between shaft 9 and valve plate surface 14 at least one outlet opening 50 am Valve plate 12 is provided, for example, transverse to Valve longitudinal axis 5 excluded from the valve plate surface 14 is to provide fluid communication with the cavity 28 of the To produce shaft 9. The axial distance of the Valve guide opening 36 to the inlet shaft opening 30 and whose opening cross-sections are chosen such that it Transition from the closed position to the open position of the Inlet valve 1, especially in the range of the maximum Open position of the inlet valve 1, to cover the Inlet shaft opening 30 with valve guide opening 36 comes in the maximum open position of the inlet valve 1 completely merge. With overlapping ones Openings 30, 36 overflow compressed air from pressure vessel 45 the connection pressure line 42, the open two-way valve 44 in the pressure line 41 and over the Cylinder opening 40 in the valve guide opening 36 in the Cavity 28 and via the at least one outlet opening 50 out of the valve plate surface 14 again. Are preferred a plurality of inlet shaft openings 30 on the periphery of the outer Shell surface 34 of the shaft 9 is provided, so that at a rotation of the inlet valve 1 a flow connection the valve guide opening 36 with at least one of the multiple inlet shaft openings 30 is present. It is also conceivable on the circumference of the outer surface 38 of the Valve guide sleeve 7 a plurality of valve guide openings 36 to be provided, for example with several, slot-shaped inlet shaft openings 30 correspond to always in the open position of the inlet valve 1 Flow connection from the compressed air tank 45 to To produce outlet opening 50 of the inlet valve 1. It is also possible that in the region of the valve guide opening 36 the inner surface 37 is formed with a circumferential groove which in the open position, the inlet shaft opening 30 in can cover any rotational position of the inlet valve 1.

Durch die im Bereich der Ventiltellerfläche 14 aus zumindest einer Auslaßöffnung 50 ausströmende Druckluft bildet sich in Offenstellung des Einlaßventils 1 ein Luftfilm, der im wesentlichen den Ventilteller 12 umgibt. Der Luftfilm verhindert, daß es insbesondere im kalten Zustand der Brennkraftmaschine sowie in bestimmten Betriebsbereichen der Brennkraftmaschine zu einer ansonsten stattfindenden Kondensation von Brennstofftröpfchen kommt, die sich dann insbesondere an der Ventiltellerfläche 14 anlagern. Wie in der Zeichnung dargestellt ist, ist es auch möglich, mehrere Auslaßöffnungen 50 aus der Ventiltellerfläche 14 auszunehmen, die zum Beispiel vom Übergangsbereich 31 zwischen Ventiltellerfläche 14 und Schaft 9 radial zum Hohlraum 28 führen, um durch die ausströmende Luft einen besonders gleichmäßigen Luftfilm an der Ventiltellerfläche 14 zu erzeugen. Es ist auch möglich, anstelle oder zusätzlich zu den Auslaßöffnungen 50 im Übergangsbereich 31 weitere Auslaßöffnungen 50 vorzusehen, die beispielsweise aus der Ventiltellerfläche 14 oder aus der äußeren Mantelfläche 34 des Schaftes 9, insbesondere in der Nähe des Ventiltellers 12, ausgenommen sind. Die Anordnung der Auslaßöffnungen 50 kann auch derart erfolgen, daß eine Vielzahl von Auslaßöffnungen 50 siebförmig die Ventiltellerfläche 14 durchlöchern. Die aus der Vielzahl von Auslaßöffnungen 50 austretende Druckluft erzeugt einen besonders gleichmäßigen Luftfilm, der dann die ganze Ventiltellerfläche 14 mit dem Ventilteller 12 umgibt.By at least in the area of the valve plate surface 14 Compressed air flowing out of an outlet opening 50 forms in Open position of the inlet valve 1, an air film which in essentially surrounds the valve plate 12. The aerial film prevents it, especially in the cold state of the Internal combustion engine and in certain operating areas of the Internal combustion engine to an otherwise taking place Condensation of droplets of fuel that then occurs in particular on the valve plate surface 14. As in the drawing is shown, it is also possible to use several Outlet openings 50 from the valve plate surface 14 except for, for example, the transition area 31 between valve plate surface 14 and shaft 9 radially to Lead cavity 28 to one through the outflowing air particularly even air film on the valve disc surface 14 to generate. It is also possible to replace or in addition to the outlet openings 50 in the transition region 31 to provide further outlet openings 50, for example from the valve plate surface 14 or from the outer Shell surface 34 of the shaft 9, in particular near the Valve plates 12 are excluded. The arrangement of the Outlet openings 50 can also be made such that a A large number of outlet openings 50 are sieve-shaped Hole valve plate surface 14. The from the multitude of Compressed air outlet openings 50 creates one particularly even air film, which then the whole Valve plate surface 14 surrounds with the valve plate 12.

Es ist aber auch möglich, die Ventiltellerfläche 14 mit einer rauhen Oberfläche auszubilden, welche die aus einer Auslaßöffnung 50 oder beispielsweise aus mehreren Auslaßöffnungen 50 austretende Druckluft an der rauhen Oberfläche derart verwirbelt, daß sich ein Luftstrom um den Ventilteller 12 herum ausbildet. Die Herstellung einer rauhen Oberfläche der Ventiltellerfläche 14 kann beispielsweise durch einen Sinterprozeß erfolgen, bei dem eine Metallschicht auf die Ventiltellerfläche 14 aufgebracht wird, um eine rauhe Oberfläche zu erzeugen. Zur Herstellung der Auslaßöffnungen 50 und der rauhen Oberfläche der Ventiltellerfläche 14 ist es auch möglich, das Einlaßventil 1 zweiteilig auszubilden, wobei ein Teil beispielsweise aus dem Schaft 9 und ein Teil aus dem Ventilteller 12 besteht, die nach der getrennten Bearbeitung von Schaft 9 und Ventilteller 12 wieder zusammengefügt werden.But it is also possible to use the valve plate surface 14 to form a rough surface which the from a Outlet opening 50 or, for example, several Outlet openings 50 escaping compressed air on the rough Swirled surface so that an air flow around the Forms valve plate 12 around. The making of a rough surface of the valve plate surface 14 can for example by a sintering process in which a metal layer is applied to the valve plate surface 14 to create a rough surface. For the production the outlet openings 50 and the rough surface of the Valve plate surface 14, it is also possible to use the inlet valve 1 to form two parts, one part for example the stem 9 and part of the valve plate 12, after the separate machining of shaft 9 and Valve plate 12 can be reassembled.

Das Ausblasen der Druckluft am Einlaßventil 1 ist insbesondere während der Kaltstartphase und der nachfolgenden Warmlaufphase sowie in bestimmten Betriebsbereichen der Brennkraftmaschine vorgesehen. Der Zeitpunkt der Druckluftzufuhr ist einerseits abhängig vom gewählten Abstand der wenigstens einen Ventilführungsöffnung 36 zur wenigstens einen Einlaßschaftöffnung 30 und andererseits vom Zweiwege-Ventil 44 steuerbar. Das Zweiwege-Ventil 44 ist hierzu beispielsweise über eine elektrische Anschlußleitung 52 an ein elektronisches Steuergerät 53 angeschlossen, das nur bei bestimmten Betriebsbereichen, insbesondere in der Kaltstartphase der Brennkraftmaschine, das Zweiwege-Ventil 44 in eine Offenstellung bringt, um Druckluft aus dem Einlaßventil 1 auszublasen. Die Druckluftzufuhr ist insbesondere während der ersten 120 Sekunden nach dem Start der Brennkraftmaschine vorgesehen. Es ist aber auch möglich, die Druckluftzufuhr zusätzlich noch in Betriebsbereichen der Brennkraftmaschine durchzuführen, bei denen beispielsweise nur kurzzeitig erhöhte schädliche Bestandteile im Abgas, zum Beispiel bei Vollast, auftreten. Derartige Betriebsbereiche können vom elektronischen Steuergerät 53 mittels mit dem Steuergerät 53 verbundener Sensoren erfaßt werden. The blowing out of the compressed air at the inlet valve 1 is especially during the cold start phase and the subsequent warm-up phase and in certain Operating areas of the internal combustion engine are provided. Of the The time of the compressed air supply is dependent on the one hand selected distance of the at least one valve guide opening 36 to at least one inlet shaft opening 30 and on the other hand controllable by the two-way valve 44. The two-way valve 44 is for this purpose, for example, via an electrical Connection line 52 to an electronic control unit 53 connected that only in certain operating areas, especially in the cold start phase of the internal combustion engine, brings the two-way valve 44 into an open position Blow out compressed air from inlet valve 1. The Compressed air supply is particularly during the first 120 Provided seconds after starting the internal combustion engine. But it is also possible to add compressed air still in operating areas of the internal combustion engine perform, for example, only for a short time increased harmful components in the exhaust gas, for example at Full load, occur. Such operating areas can from electronic control device 53 by means of control device 53 connected sensors can be detected.

Die über die Ventiltellerfläche 14 des Ventiltellers 12 abgegebene Druckluft bewirkt zudem, daß eine verbesserte Vermischung des vom Brennstoffeinspritzventil 24 abgegebenen Brennstoffs, insbesondere im Brennraum 20, stattfindet. Dies führt zu einer optimalen Verbrennung des Brennstoffs im Brennraum 20, wodurch sich auch der Brennstoffverbrauch der Brennkraftmaschine reduziert. Überdies erfolgt durch die im Hohlraum 28 strömende und aus dem Ventilteller 12 ausströmende Druckluft eine Kühlung des Einlaßventils 1, so daß dessen thermische Belastung, insbesondere bei Vollast der Brennkraftmaschine, reduziert wird, wodurch sich unter anderem die Lebensdauer des Einlaßventils 1 erhöht.The valve plate surface 14 of the valve plate 12 released compressed air also causes an improved Mixing that emitted by the fuel injector 24 Fuel, especially in the combustion chamber 20, takes place. This leads to an optimal combustion of the fuel in the Combustion chamber 20, which also increases fuel consumption Internal combustion engine reduced. Furthermore, the im Cavity 28 flowing out of the valve plate 12 escaping compressed air cooling the inlet valve 1, so that its thermal load, especially at full load the internal combustion engine, is reduced, which results in other increases the life of the inlet valve 1.

Claims (10)

  1. Arrangement for supplying pressurized gaseous medium, in particular compressed air, to an inlet valve (1) for a combustion space (20) of an internal combustion engine, the inlet valve having a shaft (20) and a valve head (12) with a side which faces away from the combustion space (20) and to which the pressurized gaseous medium is fed, characterized in that an elongated cavity (28) is formed in the shaft (9) said cavity (28) having at least one inlet shaft opening (30) and at least one outlet opening (50) which is provided on the side of the inlet valve which faces away from the combustion space (20) of the internal combustion engine, the pressurized gaseous medium flowing into the cavity via the inlet shaft opening (30) and flowing out of it via the outlet opening (50), with the result that a film which essentially surrounds the valve head (12) and which avoids fuel condensing on the valve head is produced.
  2. Arrangement according to Claim 1, characterized in that the at least one outlet opening (50) is provided in a transition area (31) between the valve head (12) and shaft (9).
  3. Arrangement according to Claim 1 or 2, characterized in that the at least one outlet opening (50) is made in a valve head face (14), facing away from the combustion space (20) of the valve head (12).
  4. Arrangement according to Claim 1, characterized in that the at least one outlet opening (50) is made in an outer surface (34) of the shaft (9).
  5. Arrangement according to Claim 2 or 3, characterized in that a plurality of outlet openings (50) are provided which extend radially from the cavity (28) to the valve head (12).
  6. Arrangment according to Claim 1, characterized in that a valve head face (14), facing away from the combustion space (20) of the valve head (12), via which the medium emerging from the at least one outlet opening (50) flows, is made rough.
  7. Arrangement according to Claim 1, characterized in that the inlet valve (1) is produced from two parts, the shaft (9) and the valve head (12).
  8. Arrangement according to Claim 1, characterized in that a line (41, 42) leads to the at least one inlet shaft opening (30), a two-way valve (44) which can interrupt the supply of the pressurized gaseous medium being accommodated in said line.
  9. Arrangement according to Claim 1 or 8, characterized in that an electronic control unit (53) is provided which controls the supply of the pressurized gaseous medium in such a way that the medium is supplied to the inlet valve (1) only in certain operating ranges, in particular in the cooled-starting phase of the internal combustion engine.
  10. Arrangement according to Claim 1, characterized in that the gaseous medium originates from a compressed air vessel (45) to which a pumping device (47) feeds the medium under pressure.
EP95114166A 1995-02-09 1995-09-09 Device for supplying a pressure fluid to an intake valve for combustion chamber in an internal combustion engine Expired - Lifetime EP0726385B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19504239A DE19504239A1 (en) 1995-02-09 1995-02-09 Inlet valve for a combustion chamber of an internal combustion engine
DE19504239 1995-02-09

Publications (2)

Publication Number Publication Date
EP0726385A1 EP0726385A1 (en) 1996-08-14
EP0726385B1 true EP0726385B1 (en) 1999-03-03

Family

ID=7753530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114166A Expired - Lifetime EP0726385B1 (en) 1995-02-09 1995-09-09 Device for supplying a pressure fluid to an intake valve for combustion chamber in an internal combustion engine

Country Status (4)

Country Link
US (1) US5617835A (en)
EP (1) EP0726385B1 (en)
JP (1) JPH08240107A (en)
DE (2) DE19504239A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511835C2 (en) * 1996-05-02 1999-12-06 Volvo Ab Apparatus and method for supplying additional air to an internal combustion engine
NO306074B1 (en) * 1997-08-27 1999-09-13 Kvaerner Asa Exhaust gas valve for internal combustion engines
US20080041343A1 (en) * 2006-07-06 2008-02-21 Parish James R Jr Fuel injection system with cross-flow nozzle for enhanced compressed natural gas jet spray
JP2012520421A (en) * 2009-03-10 2012-09-06 スターマン・デジタル・システムズ・エルエルシイ Dual fuel compression ignition engine and method
US9523293B2 (en) * 2013-09-19 2016-12-20 Ford Global Technologies, Llc Internal combustion engine and method for operating an internal combustion engine
CN104405466A (en) * 2014-10-21 2015-03-11 大连理工大学 High pressure inlet valve for compressed air engine
JP5985003B1 (en) * 2015-04-27 2016-09-06 三菱電機株式会社 Intake valve for internal combustion engine
WO2017041835A1 (en) * 2015-09-09 2017-03-16 Volvo Truck Corporation Valve arrangement
CN108291477B (en) * 2015-12-07 2021-08-24 沃尔沃卡车集团 Control system and control method for internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799397A (en) * 1927-04-25 1931-04-07 Taylor Cecil Hamelin Internal-combustion engine
JPS5999028A (en) * 1982-11-27 1984-06-07 Hino Motors Ltd Air injecting apparatus for use in diesel engine with turbocharger for supplementing lack of air
JPS59158363A (en) * 1983-02-28 1984-09-07 Hino Motors Ltd Fluid supply device to intake and exhaust ports

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191509667A (en) * 1915-07-02 1916-05-11 Herbert Lindley Improvements in the Construction of Mushroom Valves particularly for Motor Cycle Engines.
US2170267A (en) * 1938-06-17 1939-08-22 Rich Mfg Corp Alloy steel
US2819704A (en) * 1955-12-09 1958-01-14 Niederman Henry Air cooled engine exhaust valves
FR1401216A (en) * 1964-01-29 1965-06-04 Union General De Minas Device improving the efficiency of internal combustion engines and new valves allowing the application
FR89404E (en) * 1964-12-23 1967-06-23 Inst Francais Du Petrole Process for the combustion of lean mixtures in spark ignition engines
DE2048228A1 (en) * 1970-10-01 1972-04-06 Volkswagenwerk Ag, 3180 Wolfsburg In particular, an air-cooled internal combustion engine with a device for exhaust gas afterburning
SE400810B (en) * 1975-07-23 1978-04-10 Nordstjernan Rederi Ab COOLING SYSTEM FOR COOLING EXHAUST VALVE FOR COMBUSTION ENGINE
US4313410A (en) * 1978-04-15 1982-02-02 Nissan Motor Company, Limited Internal combustion engine with fuel injector
DE3600067A1 (en) 1986-01-03 1987-07-09 Juergen Schaefler Inlet valve and exhaust valve, especially for internal combustion engines
US4976248A (en) * 1989-04-03 1990-12-11 James Rowe Apparatus for the generation of turbulence in internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799397A (en) * 1927-04-25 1931-04-07 Taylor Cecil Hamelin Internal-combustion engine
JPS5999028A (en) * 1982-11-27 1984-06-07 Hino Motors Ltd Air injecting apparatus for use in diesel engine with turbocharger for supplementing lack of air
JPS59158363A (en) * 1983-02-28 1984-09-07 Hino Motors Ltd Fluid supply device to intake and exhaust ports

Also Published As

Publication number Publication date
DE59505201D1 (en) 1999-04-08
US5617835A (en) 1997-04-08
EP0726385A1 (en) 1996-08-14
DE19504239A1 (en) 1996-08-14
JPH08240107A (en) 1996-09-17

Similar Documents

Publication Publication Date Title
DE3732259C2 (en) Method and device for injecting fuel into an internal combustion engine
EP0726385B1 (en) Device for supplying a pressure fluid to an intake valve for combustion chamber in an internal combustion engine
CN1080378C (en) I.C. engine oil spraying valve
DE4214646A1 (en) FUEL INJECTION NOZZLE FOR PRIME AND MAIN INJECTION
US4865002A (en) Fuel supply system for internal combustion engine
JPH01125559A (en) Braking release type poppet cover orifice type fuel injection nozzle
EP2718558B1 (en) Injection valve for internal combustion engines
DE3734737A1 (en) FUEL INJECTION SYSTEM AND COMBUSTION ENGINE EQUIPPED WITH THIS
WO2012167992A1 (en) Injection valve for internal combustion engines
DE3150883A1 (en) "FUEL INJECTION NOZZLE"
US4693424A (en) Poppet covered orifice fuel injection nozzle
EP0611885B1 (en) Fuel injector valve for an internal combustion piston engine
JPS6153550B2 (en)
JPS5845596B2 (en) Injection valve for reciprocating internal combustion engine
DE3838349A1 (en) COMBUSTION OF A TWO-STROKE ENGINE
DE2807345A1 (en) Turbulence producing fuel injection valve for diesel engine - has turbulence chamber with fuel feed channels entering valve seat area at tangent
US7159801B2 (en) Fuel injector assembly and poppet
DE69521691T2 (en) FUEL SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE
EP0209244B1 (en) Fuel injection nozzle
DE2310289C3 (en) Fuel injection device for internal combustion engines
DE4225991C2 (en) High pressure air fuel injector for a diesel internal combustion engine
EP0728941A1 (en) Apparatus for introducing fuel into the combustion chamber of an internal combustion engine
CA1065710A (en) Fuel injection nozzle with compressible valve
US5024385A (en) Internal combustion engine fuel supply system
DE60314226T2 (en) Spray pattern element and fuel injection valve with the same

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): DE FR GB

17P Request for examination filed

Effective date: 19970214

17Q First examination report despatched

Effective date: 19970801

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 59505201

Country of ref document: DE

Date of ref document: 19990408

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

Effective date: 19990505

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
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: GB

Payment date: 20020814

Year of fee payment: 8

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

Ref country code: FR

Payment date: 20020918

Year of fee payment: 8

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

Ref country code: DE

Payment date: 20021025

Year of fee payment: 8

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 NON-PAYMENT OF DUE FEES

Effective date: 20030909

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: 20040401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030909

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 NON-PAYMENT OF DUE FEES

Effective date: 20040528

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST