EP0514646B1 - Intake device for a multicylinder internal combustion engine - Google Patents

Intake device for a multicylinder internal combustion engine Download PDF

Info

Publication number
EP0514646B1
EP0514646B1 EP92105425A EP92105425A EP0514646B1 EP 0514646 B1 EP0514646 B1 EP 0514646B1 EP 92105425 A EP92105425 A EP 92105425A EP 92105425 A EP92105425 A EP 92105425A EP 0514646 B1 EP0514646 B1 EP 0514646B1
Authority
EP
European Patent Office
Prior art keywords
intake
intake unit
combustion engine
unit according
pipes
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
EP92105425A
Other languages
German (de)
French (fr)
Other versions
EP0514646A1 (en
Inventor
Herbert Ampferer
Frank Ickinger
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0514646A1 publication Critical patent/EP0514646A1/en
Application granted granted Critical
Publication of EP0514646B1 publication Critical patent/EP0514646B1/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
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • F02M35/116Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • 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
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078Connections of intake systems to the engine
    • F02M35/10085Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • 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
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/1034Manufacturing and assembling intake systems
    • F02M35/10354Joining multiple sections together
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00Manufacturing
    • F02F2200/06Casting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/006Camshaft or pushrod housings
    • 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
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026Plenum chambers
    • F02M35/10045Multiple plenum chambers; Plenum chambers having inner separation walls

Definitions

  • the invention relates to an intake system of a multi-cylinder internal combustion engine, the intake system being held in a vibration-decoupled manner above the cylinders on the internal combustion engine.
  • DE-36 41 811 C1 discloses an intake system for a multi-cylinder internal combustion engine, which is held on the cylinder head in a vibration-decoupled manner with the interposition of elastic bearing elements.
  • the bearing elements are stressed between the intake system and supports on the cylinder head by means of screw connections.
  • the invention is based on the object of designing an intake system in such a way that simple and quick installation on the internal combustion engine is ensured and at the same time optimal vibration decoupling of the intake system from the internal combustion engine is achieved.
  • the arrangement of a decoupling element acting between the intake system and the cylinder head, which is subjected to tensile stress, and a further decoupling element which is arranged between the cylinder head and individual intake pipes of the intake system and which is subjected to pressure makes it possible to assemble the intake system in a few steps or to dismantle. All that is required for this is access from above, which vertically penetrates the intake system To tension clamping means, whereby the intake system is already connected elastically and vibration-decoupled to the internal combustion engine via the decoupling element supported on the cylinder head.
  • the forces transmitted by the clamping means to the intake system are based on the further decoupling elements which are placed between the intake system and the cylinder heads before the assembly of the intake system.
  • an intake manifold socket is arranged between the further decoupling elements, which simultaneously act as a seal, and a flange surface, the decoupling elements being supported on the flange surface via fastening pipes between adjacent suction tube sockets.
  • the individual intake manifold connecting pieces of a row of cylinders leading to each cylinder are formed in one piece as a bridge together with the fastening pipes.
  • these bridges are screwed to the flange surface by means of a fastening pipe arranged between the first and second and between the third and fourth intake manifold.
  • the decoupling elements are held on arms which are formed in one piece with the fastening pipes and which extend transversely to the bridge in the immediate vicinity of the cylinder heads.
  • the tension screws can thus easily penetrate an external area of the intake manifold, for example an air collector. To below the To reach the intake system located in the V of the internal combustion engine, only four clamping screws need to be loosened, as a result of which the intake manifold can be removed.
  • the intake system is held on the internal combustion engine with dampers which comprise a pot-like housing detachably connected to the internal combustion engine.
  • dampers which comprise a pot-like housing detachably connected to the internal combustion engine.
  • a rubber-elastic wet is arranged, which is penetrated by a clamping sleeve provided with a disc arranged at the end, which is detachably connected to the intake system.
  • the intake system and clamping sleeves are connected with lag screws which penetrate receptacles formed in the intake system almost vertically. This ensures good access to the connection.
  • a stop arranged in the receptacle limits the forces transmitted by the screwing of the clamping sleeve to the rubber-elastic mass, so that a desired identifier of the damper can be set.
  • the internal combustion engine 1 is formed together with an intake system 3 symmetrically to a perpendicular plane E, which receives a crankshaft, not shown.
  • the cylinder bank 2 has a cylinder head 4 (only indicated) with a hood 5 and a flange surface 6, into which inlet channels 7 formed in the cylinder head 4 open.
  • the intake system 3 which has an intake manifold 9 consisting of air collectors 10 and individual intake pipes 11 and intake manifold stubs 12 arranged between the individual intake pipes 11 and the flange surfaces 6.
  • the intake manifold 12 of a cylinder bank 2 are integrally formed as a bridge 13 which forms part of the intake system 3. Between the intake manifold 12, the bridge 13 has two fastening pipes 14 formed integrally therewith. Arms 15 cast onto the fastening pipes 14 extend transversely to the plane E into the vicinity of the cylinder heads 4.
  • the arms 15 releasably connect to them, designed as dampers 16, pot-like decoupling elements.
  • the dampers 16 have as a unit within a closed volume V a rubber-elastic mass 17, which is penetrated by a clamping sleeve 19 provided with an internal thread 18, the lower end of which is formed by a disk 20 in contact with the mass 17.
  • the bridges 13 When mounting the intake system 3 on the internal combustion engine 1 for the first time, the bridges 13 are first screwed to the flange surface 6 by means of the fastening pipes 14 and further openings 28 formed in a flange 27.
  • the bridges 13 point Fuel supply lines 30 and injection valve receptacles 31, which are not explained in detail.
  • a sealing strip 26 is placed on each bridge 13.
  • a damper 16 is detachably connected to an arm 15 by a screw 33 accessible through the internal thread 18. Subsequently, the intake manifold 9 with the individual intake pipes 11 is placed on the sealing strips 26.
  • tensioning means designed as tension screws 35 are guided up to the clamping sleeve 19 and screwed to their internal thread 18.
  • An abutment shoulder designed as a stop 44 in the receptacle 34 limits the compression of the mass 17 to an optimum dimension for effective decoupling.
  • the entire intake manifold 9 can be detached from the internal combustion engine by the arrangement described above by loosening only four lag screws 35.
  • lag screws 35 e.g. quick-release elements provided with a bayonet lock are also used, which clamp the intake manifold 9 and damper 16 together with a rotation of 180 °.
  • the decoupling elements are only subjected to tension regardless of the type of clamping means, the tensile forces transmitted by the damper 16 by means of the screw 33, the arm 15 and the fastening pipes 14 being supported in the flange surface 6 of the cylinder head 4.
  • the forces transmitted from the tensioning means to the intake manifold 9 are also supported on the flange surface 6 via the further decoupling element which is thereby subjected to pressure and the intake manifold nozzles 12.
  • FIG. 4 A second embodiment of the invention is shown in FIG. 4. Identical reference symbols denote the same components in both versions.
  • the intake system 3 is held in a vibration-decoupled manner on the internal combustion engine 1 with dampers 16.
  • the dampers 16 have a pot-like housing 36, which is detachably fastened to the internal combustion engine 1 with screws 33.
  • the rubber-elastic mass 17 penetrated by the clamping sleeve 19 is arranged, which is supported on a cover 38 held in a bead 37 of the housing 36.
  • Recesses 39 are arranged in the upper side of the mass 17 facing the cover 38, into which cut-out lugs 40 of the cover 38 forming two claws engage.
  • two sloping ribs 42 run radially on the disk 20 and engage in corresponding recesses 43 in the mass 17.
  • the assembly or disassembly of the intake system takes place with respect to the damper 16 in an analogous manner as in the first embodiment of the invention.
  • the mass 17 fills the volume V almost completely and thereby presses the disc 20 against the bottom of the housing 36 opposite the cover 38.
  • the clamping sleeve 19 is pulled out of the damper 16 and presses the mass 17 onto it a measure setting a certain identifier. This dimension is limited by an abutment shoulder formed in the receptacle 34 as a stop 44.
  • the clamping sleeve 19 is prevented from rotating with respect to the mass 17 or rotation of the mass 17 with respect to the housing 36 by the ribs 42 engaging in the recesses 43 or by the lugs 40 engaging in the recesses 39 .
  • the forces introduced by the lag screws 35 into the air collector 10 are supported, for example, by suction pipes (not shown) of the intake system 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Vibration Prevention Devices (AREA)

Description

Die Erfindung betrifft eine Ansauganlage einer mehrzylindrigen Brennkraftmaschine, wobei die Ansauganlage schwingungsentkoppelt oberhalb der Zylinder an der Brennkraftmaschine gehalten ist.The invention relates to an intake system of a multi-cylinder internal combustion engine, the intake system being held in a vibration-decoupled manner above the cylinders on the internal combustion engine.

In der DE-36 41 811 C1 ist eine Ansauganlage für eine mehrzylindrige Brennkraftmaschine offenbart, die unter Zwischenschaltung von elastischen Lagerelementen schwingungsentkoppelt am Zylinderkopf gehalten ist. Die Lagerelemente sind dabei zwischen Ansauganlage und Stützen am Zylinderkopf mittels Verschraubungen auf Druck beansprucht. Bei der Montage der Ansauganlage ist der Zugang zu diesen Verschraubungen sowie zu den Verbindungsstellen zwischen Einzelsaugrohren der Ansauganlage und in einer Flanschfläche mündenden, im Zylinderkopf ausgebildeten Einlaßkanälen erschwert.DE-36 41 811 C1 discloses an intake system for a multi-cylinder internal combustion engine, which is held on the cylinder head in a vibration-decoupled manner with the interposition of elastic bearing elements. The bearing elements are stressed between the intake system and supports on the cylinder head by means of screw connections. When assembling the intake system, access to these screw connections and to the connection points between the individual intake pipes of the intake system and inlet channels opening in a flange surface and formed in the cylinder head is made more difficult.

Aus der US-A-4 901 681 ist eine Ansauganlage für eine mehrzylindrige Brennkraftmaschine gemäß dem Oberbegriff von Anspruch 1 bekannt, die über Entkoppelungselemente an der Brennkraftmaschine gehalten ist. So sind erste Entkoppelungselemente zwischen den Einzelsaugrohren und den entsprechendne Rohren der Brennkraftmaschine und zweite Entkoppelungselemente zu Abstützung zwischen der Ansauganlage und der Brennkraftmaschine vorgesehen.From US-A-4 901 681 an intake system for a multi-cylinder internal combustion engine according to the preamble of claim 1 is known, which is held on the internal combustion engine via decoupling elements. For example, first decoupling elements are provided between the individual intake pipes and the corresponding pipes of the internal combustion engine, and second decoupling elements are provided for support between the intake system and the internal combustion engine.

Der Erfindung liegt die Aufgabe Zugrunde, eine Ansauganlage so zu gestalten, daß eine einfache und schnelle Montage an der Brennkraftmaschine gewährleistet ist und dabei gleichzeitig eine optimale Schwingungsentkopplung der Ansauganlage von der Brennkraftmaschine erzielt wird.The invention is based on the object of designing an intake system in such a way that simple and quick installation on the internal combustion engine is ensured and at the same time optimal vibration decoupling of the intake system from the internal combustion engine is achieved.

Die Lösung dieser Aufgabe gelingt mit den Merkmalen des Anspruches 1. Weitere, die Erfindung vorteilhaft ausgestaltende Merkmale sind in den Unteransprüchen genannt.This object is achieved with the features of claim 1. Further features which advantageously configure the invention are mentioned in the subclaims.

Nach der Ausführung der Erfindung ist es durch die Anordnung eines zwischen der Ansauganlage und dem Zylinderkopf wirkenden, auf Zug beanspruchten Entkoppelelementes und eines weiteren, zwischen dem Zylinderkopf und Einzelsaugrohren der Ansauganlage auf Druck beansprucht angeordneten Entkoppelelementes möglich, die Ansauganlage in wenigen Schritten zu montieren bzw. zu demontieren. Hierzu ist es lediglich erforderlich, von oben zugängliche, die Ansauganlage vertikal durchdringende Spannmitteln zu spannen, wodurch die Ansauganlage bereits über das sich am Zylinderkopf abstützende Entkoppelelement elastisch und schwingungsentkoppelt mit der Brennkraftmaschine verbunden ist. Die von den Spannmitteln dabei auf die Ansauganlage übertragenen Kräfte stützen sich an den weiteren Entkoppelelementen ab, die vor der Montage der Ansauganlage zwischen diese und die Zylinderköpfe gelegt werden.According to the embodiment of the invention, the arrangement of a decoupling element acting between the intake system and the cylinder head, which is subjected to tensile stress, and a further decoupling element which is arranged between the cylinder head and individual intake pipes of the intake system and which is subjected to pressure, makes it possible to assemble the intake system in a few steps or to dismantle. All that is required for this is access from above, which vertically penetrates the intake system To tension clamping means, whereby the intake system is already connected elastically and vibration-decoupled to the internal combustion engine via the decoupling element supported on the cylinder head. The forces transmitted by the clamping means to the intake system are based on the further decoupling elements which are placed between the intake system and the cylinder heads before the assembly of the intake system.

Für die Montage bzw. Demontage ist somit lediglich das Einlegen der weiteren Entkoppelelemente vor dem Aufsetzen der Ansauganlage erforderlich, anschließend das Spannen der z.B. als Zugschraube ausgebildeten Spannmittel.For assembly or disassembly, all that is required is to insert the further decoupling elements before attaching the intake system, then tightening the e.g. designed as a tension screw.

Sollte die Zuganglichkeit des weiteren Entkoppelelementes bei einer Reihen-Brennkraftmaschine z.B. aufgrund der Einbauverhältnisse erschwert oder aber bei einer V-Brennkraftmaschine, deren einstückiger Ansaugverteiler der Ansauganlage die in Zylinderköpfen ausgebildeten Einlaßkanäle vollständig abdeckt, unmöglich sein, so ermöglicht diese Anordnung dennoch eine einfache und schnelle Montage.If the accessibility of the further decoupling element in a series internal combustion engine e.g. difficult due to the installation conditions or impossible with a V-type internal combustion engine, the one-piece intake manifold of the intake system which completely covers the intake ports formed in cylinder heads, this arrangement nevertheless enables simple and quick installation.

In vorteilhafter Ausgestaltung dieser Ausführung der Erfindung ist zwischen den gleichzeitig als Dichtung wirkenden weiteren Entkoppelelementen und einer Flanschfläche ein Saugrohrstutzen angeordnet, wobei sich zwischen benachbarten Saugrohrstutzen die Entkoppelelemente über Befestigungspfeifen an der Flanschfläche abstützt. Dadurch ist keine weitere, bearbeitete Flanschfläche am Zylinderkopf für die Abstützung dieser Befestigungspfeifen erforderlich.In an advantageous embodiment of this embodiment of the invention, an intake manifold socket is arranged between the further decoupling elements, which simultaneously act as a seal, and a flange surface, the decoupling elements being supported on the flange surface via fastening pipes between adjacent suction tube sockets. As a result, no further machined flange surface on the cylinder head is required to support these mounting pipes.

In weiterer Ausgestaltung sind die einzelnen, zu jedem Zylinder führenden Saugrohrstutzen einer Zylinderreihe gemeinsam mit den Befestigungspfeifen einstückig als Brücke ausgebildet. Bei z.B. einer V-Brennkraftmaschine mit vier Zylindern pro Zylinderreihe sind diese Brücken mittels einer zwischen dem ersten und dem zweiten sowie einer zwischen dem dritten und dem vierten Saugrohrstutzen angeordneten Befestigungspfeife mit der Flanschfläche verschraubt. Die Entkoppelelemente sind an einstückig mit den Befestigungspfeifen ausgebildeten Armen gehalten, die sich quer zu der Brücke bis in unmittelbarer Nähe der Zylinderköpfe erstrecken. Die Zugschrauben können dadurch in einfacher Weise einen außenliegenden Bereich des Ansaugverteilers, z.B. einen Luftsammler durchdringen. Um unterhalb der Ansauganlage im V der Brennkraftmaschine angeordnete Bauteile zu erreichen, brauchen somit lediglich vier Spannschrauben gelöst zu werden, wodurch der Ansaugverteiler abnehmbar wird.In a further embodiment, the individual intake manifold connecting pieces of a row of cylinders leading to each cylinder are formed in one piece as a bridge together with the fastening pipes. In, for example, a V-type internal combustion engine with four cylinders per row of cylinders, these bridges are screwed to the flange surface by means of a fastening pipe arranged between the first and second and between the third and fourth intake manifold. The decoupling elements are held on arms which are formed in one piece with the fastening pipes and which extend transversely to the bridge in the immediate vicinity of the cylinder heads. The tension screws can thus easily penetrate an external area of the intake manifold, for example an air collector. To below the To reach the intake system located in the V of the internal combustion engine, only four clamping screws need to be loosened, as a result of which the intake manifold can be removed.

Gemäß dieser Ausführung der Erfindung ist die Ansauganlage mit Dämpfern an der Brennkraftmaschine gehalten, welche ein lösbar mit der Brennkraftmaschine verbundenes, topfartiges Gehäuse umfassen. In diesem Gehäuse ist eine gummielastische Nasse angeordnet, die von einer mit einer endseitig angeordneten Scheibe versehene Spannhülse durchdrungen wird, welche mit der Ansauganlage lösbar verbunden ist. Mit dieser Anordnung ist eine einfache und schnelle Montage bzw. Demontage der Ansauganlage an der Brennkraftmaschine bei gleichzeitiger Schwingungsentkopplung durch die lösbare Verbindung zwischen Spannhülse und Ansauganlage gegeben.According to this embodiment of the invention, the intake system is held on the internal combustion engine with dampers which comprise a pot-like housing detachably connected to the internal combustion engine. In this housing a rubber-elastic wet is arranged, which is penetrated by a clamping sleeve provided with a disc arranged at the end, which is detachably connected to the intake system. With this arrangement, a simple and quick assembly and disassembly of the intake system on the internal combustion engine with simultaneous vibration decoupling is provided by the detachable connection between the adapter sleeve and the intake system.

In vorteilhafter Ausgestaltung dieser Ausführung sind Ansauganlage und Spannhülsen mit Zugschrauben verbunden, welche in der Ansauganlage ausgebildete Aufnahmen nahezu vertikal durchdringen. Dadurch ist eine gute Zugänglichkeit der Verbindung gewährleistet. Ein in der Aufnahme angeordneter Anschlag begrenzt die durch das Verschrauben von der Spannhülse auf die gummielastische Masse übertragenden Kräfte, so daß eine gewünschte Kennung des Dämpfers einstellbar ist.In an advantageous embodiment of this embodiment, the intake system and clamping sleeves are connected with lag screws which penetrate receptacles formed in the intake system almost vertically. This ensures good access to the connection. A stop arranged in the receptacle limits the forces transmitted by the screwing of the clamping sleeve to the rubber-elastic mass, so that a desired identifier of the damper can be set.

Die Erfindung wird im folgenden anhand von Figuren erläutert.The invention is explained below with reference to figures.

Es zeigen:

Fig. 1
eine Ansicht einer ersten Ausführung einer Ansauganlage im Schnitt,
Fig. 2
eine Draufsicht in Pfeilrichtung X gemäß Fig. 1 gesehen,
Fig. 3
eine Ansicht einer Brücke der Ansauganlage in Pfeilrichtung Y gemäß Fig. 1,
Fig. 4
eine Ansicht einer zweiten Ausführung im Schnitt,
Fig. 5
einen Dämpfer einer Ansauganlage vergrößert im Schnitt,
Fig. 6
eine Draufsicht auf ein Bauteil nach der Erfindung,
Fig. 7
einen Schnitt entlang der Linie VII-VII gemäß Fig. 5 und
Fig. 8
einen Schnitt entlang der Linie VIII-VIII gemäß Fig. 5.
Show it:
Fig. 1
a view of a first embodiment of an intake system in section,
Fig. 2
a plan view seen in the direction of arrow X according to FIG. 1,
Fig. 3
2 shows a view of a bridge of the intake system in the direction of arrow Y according to FIG. 1,
Fig. 4
a view of a second embodiment in section,
Fig. 5
a damper of an intake system enlarged on average,
Fig. 6
a plan view of a component according to the invention,
Fig. 7
a section along the line VII-VII of FIG. 5 and
Fig. 8
a section along the line VIII-VIII of FIG. 5.

Von einer V-Brennkraftmaschine 1 ist nur eine Zylinderreihe 2 mit vier Zylindern angedeutet dargestellt. Die Brennkraftmaschine 1 ist gemeinsam mit einer Ansauganlage 3 symmetrisch zu einer senkrecht verlaufenden Ebene E ausgebildet, die eine nicht gezeigte Kurbelwelle aufnimmt. Die Zylinderreihe 2 weist einen nur angedeutet gezeigten Zylinderkopf 4 mit einer Haube 5 und einer Flanschfläche 6 auf, in der im Zylinderkopf 4 ausgebildete Einlaßkanäle 7 münden.Of a V-type internal combustion engine 1, only one row of cylinders 2 with four cylinders is shown. The internal combustion engine 1 is formed together with an intake system 3 symmetrically to a perpendicular plane E, which receives a crankshaft, not shown. The cylinder bank 2 has a cylinder head 4 (only indicated) with a hood 5 and a flange surface 6, into which inlet channels 7 formed in the cylinder head 4 open.

Oberhalb und zwischen den Zylinderreihen 2 ist die Ansauganlage 3 angeordnet, die einen Ansaugverteiler 9, bestehend aus Luftsammlern 10 und Einzelsaugrohren 11 sowie zwischen den Einzelsaugrohren 11 und den Flanschflächen 6 angeordnete Saugrohrstutzen 12 aufweist. Die Saugrohrstutzen 12 einer Zylinderreihe 2 sind einstückig als Brücke 13 ausgebildet, die einen Teil der Ansauganlage 3 bildet. Zwischen den Saugrohrstutzen 12 weist die Brücke 13 zwei einstückig mit dieser ausgebildete Befestigungspfeifen 14 auf. Quer zu der Ebene E erstrecken sich an die Befestigungspfeifen 14 angegossene Arme 15 bis in die Nähe der Zylinderköpfe 4.Above and between the rows of cylinders 2, the intake system 3 is arranged, which has an intake manifold 9 consisting of air collectors 10 and individual intake pipes 11 and intake manifold stubs 12 arranged between the individual intake pipes 11 and the flange surfaces 6. The intake manifold 12 of a cylinder bank 2 are integrally formed as a bridge 13 which forms part of the intake system 3. Between the intake manifold 12, the bridge 13 has two fastening pipes 14 formed integrally therewith. Arms 15 cast onto the fastening pipes 14 extend transversely to the plane E into the vicinity of the cylinder heads 4.

An der geodätisch höchst liegenden Stelle tragen die Arme 15 lösbar mit ihnen verbundene, als Dämpfer 16 ausgebildete, topfartige Entkoppelelemente. Die Dämpfer 16 weisen als Baueinheit innerhalb eines geschlossenen Volumens V eine gummielastische Masse 17 auf, die von einer mit einem Innengewinde 18 versehenen Spannhülse 19 durchsetzt ist, deren unterer Abschluß von einer mit der Masse 17 in Kontakt stehenden Scheibe 20 gebildet wird.At the geodetically highest point, the arms 15 releasably connect to them, designed as dampers 16, pot-like decoupling elements. The dampers 16 have as a unit within a closed volume V a rubber-elastic mass 17, which is penetrated by a clamping sleeve 19 provided with an internal thread 18, the lower end of which is formed by a disk 20 in contact with the mass 17.

Zwischen den aneinandergrenzenden Einzelsaugrohren 11 und den Saugrohrstutzen 12 sind als Dichtung 25 ausgebildete weitere Entkoppelelemente angeordnet, welche für eine Zylinderreihe 2 zu einem Dichtstreifen 26 zusammengefaßt untereinander verbunden und mit nicht gezeigten Nasen gegen Verrutschen gesichert sind.Between the adjoining individual intake pipes 11 and the intake manifold connection 12, further decoupling elements configured as seals 25 are arranged, which for a row of cylinders 2 are combined to form a sealing strip 26 and are secured against slipping with noses (not shown).

Bei der erstmaligen Montage der Ansauganlage 3 an der Brennkraftmaschine 1 werden zunächst die Brücken 13 mittels der Befestigungspfeifen 14 sowie weiterer, in einem Flansch 27 ausgebildeter Öffnungen 28 mit der Flanschfläche 6 verschraubt. Die Brücken 13 weisen Kraftstoffversorgungsleitungen 30 sowie Einspritzventilaufnahmen 31 auf, die nicht näher erläutert sind. Zur weiteren Montage bzw. zur Demontage z.B. zu Servicezwecken wird ein Dichtstreifen 26 auf jede Brücke 13 gelegt. Jeweils ein Dämpfer 16 wird mit einer durch das Innengewinde 18 zuganglichen Schraube 33 mit einem Arm 15 lösbar verbunden. Anschließend wird der Ansaugverteiler 9 mit den Einzelsaugrohren 11 auf die Dichtstreifen 26 gelegt. Durch vertikal in den Luftsammlern 10 ausgebildete Aufnahmen 34 werden als Zugschrauben 35 ausgebildete Spannmittel bis zur Spannhülse 19 geführt und mit deren Innengewinde 18 verschraubt. Eine in der Aufnahme 34 als Anschlag 44 ausgebildete Anlageschulter begrenzt die Stauchung der Masse 17 auf ein für eine wirksame Entkopplung optimales Maß.When mounting the intake system 3 on the internal combustion engine 1 for the first time, the bridges 13 are first screwed to the flange surface 6 by means of the fastening pipes 14 and further openings 28 formed in a flange 27. The bridges 13 point Fuel supply lines 30 and injection valve receptacles 31, which are not explained in detail. For further assembly or disassembly, for example for service purposes, a sealing strip 26 is placed on each bridge 13. A damper 16 is detachably connected to an arm 15 by a screw 33 accessible through the internal thread 18. Subsequently, the intake manifold 9 with the individual intake pipes 11 is placed on the sealing strips 26. By means of receptacles 34 formed vertically in the air collectors 10, tensioning means designed as tension screws 35 are guided up to the clamping sleeve 19 and screwed to their internal thread 18. An abutment shoulder designed as a stop 44 in the receptacle 34 limits the compression of the mass 17 to an optimum dimension for effective decoupling.

Der gesamte Ansaugverteiler 9 ist durch die vorbeschriebene Anordnung durch das Lösen von lediglich vier Zugschrauben 35 von der Brennkraftmaschine lösbar. Anstelle der Zugschrauben 35 können als Spannmittel z.B. auch mit einem Bajonettverschluß versehene Schnellspannelemente verwendet werden, die mit einer Drehung um 180° Grad Ansaugverteiler 9 und Dämpfer 16 miteinander verspannen.The entire intake manifold 9 can be detached from the internal combustion engine by the arrangement described above by loosening only four lag screws 35. Instead of the lag screws 35, e.g. quick-release elements provided with a bayonet lock are also used, which clamp the intake manifold 9 and damper 16 together with a rotation of 180 °.

Die Entkoppelelemente werden unabhängig von der Art der Spannmittel ausschließlich auf Zug beansprucht, wobei die vom Dämpfer 16 mittels der Schraube 33, dem Arm 15 und der Befestigungspfeifen 14 übertragenen Zugkräfte in der Flanschfläche 6 des Zylinderkopfes 4 abgestützt werden. Die von dem Spannmittel dabei auf den Ansaugverteiler 9 übertragenen Kräfte stützen sich über das dadurch auf Druck beanspruchte weitere Entkoppelelement und die Saugrohrstutzen 12 ebenfalls auf der Flanschfläche 6 ab.The decoupling elements are only subjected to tension regardless of the type of clamping means, the tensile forces transmitted by the damper 16 by means of the screw 33, the arm 15 and the fastening pipes 14 being supported in the flange surface 6 of the cylinder head 4. The forces transmitted from the tensioning means to the intake manifold 9 are also supported on the flange surface 6 via the further decoupling element which is thereby subjected to pressure and the intake manifold nozzles 12.

Eine zweite Ausführung der Erfindung ist in Fig. 4 dargestellt. Identische Bezugszeichen kennzeichnen in beiden Ausführungen gleiche Bauteile. Die Ansauganlage 3 ist mit Dämpfern 16 schwingungsentkoppelt an der Brennkraftmaschine 1 gehalten. Die Dämpfer 16 weisen ein topfartiges Gehäuse 36 auf, welches mit Schrauben 33 an der Brennkraftmaschine 1 lösbar befestigt ist. In dem Volumen V des Dämpfers 16 ist die von der Spannhülse 19 durchdrungene, gummielastische Masse 17 angeordnet, die sich an einem in einer Sicke 37 des Gehäuses 36 gehaltenen Deckel 38 abstützt.A second embodiment of the invention is shown in FIG. 4. Identical reference symbols denote the same components in both versions. The intake system 3 is held in a vibration-decoupled manner on the internal combustion engine 1 with dampers 16. The dampers 16 have a pot-like housing 36, which is detachably fastened to the internal combustion engine 1 with screws 33. In the volume V of the damper 16, the rubber-elastic mass 17 penetrated by the clamping sleeve 19 is arranged, which is supported on a cover 38 held in a bead 37 of the housing 36.

In der dem Deckel 38 zugewandten Oberseite der Masse 17 sind Aussparungen 39 angeordnet, in die zwei Krallen bildende ausgestanzte Fahnen 40 des Deckels 38 eingreifen.
Von einem das Innengewinde 18 aufnehmenden Hülsenkörper 41 ausgehend verlaufen radial zwei abfallend gestaltete Rippen 42 auf der Scheibe 20, die in korrespondierende Ausnehmungen 43 der Masse 17 eingreifen.
Recesses 39 are arranged in the upper side of the mass 17 facing the cover 38, into which cut-out lugs 40 of the cover 38 forming two claws engage.
Starting from a sleeve body 41 receiving the internal thread 18, two sloping ribs 42 run radially on the disk 20 and engage in corresponding recesses 43 in the mass 17.

Die Montage bzw. Demontage der Ansauganlage erfolgt bezüglich der Dämpfer 16 in analoger Weise wie bei der ersten Ausführung der Erfindung. Vor dem Verschrauben füllt die Masse 17 das Volumen V nahezu vollständig aus und preßt dabei die Scheibe 20 an den dem Deckel 38 gegenüberliegenden Boden des Gehäuses 36. Während des Verschraubens wird die Spannhülse 19 aus dem Dämpfer 16 herausgezogen und preßt dabei die Masse 17 auf ein eine bestimmte Kennung einstellendes Maß zusammen. Dieses Maß ist durch eine in der Aufnahme 34 als Anschlag 44 ausgebildete Anlageschulter begrenzt. Bei einem Lösen oder Anziehen der Zugschrauben 35 ist ein Verdrehen der Spannhülse 19 gegenüber der Masse 17 bzw. ein Verdrehen der Masse 17 gegenüber dem Gehäuse 36 durch die in die Ausnehmungen 43 eingreifenden Rippen 42 bzw. durch die in die Aussparungen 39 eingreifenden Fahnen 40 verhindert. Die Abstützung der von den Zugschrauben 35 in den Luftsammler 10 eingeleiteten Kräfte erfolgt beispielsweise über nicht gezeigte Saugrohre der Ansauganlage 3.The assembly or disassembly of the intake system takes place with respect to the damper 16 in an analogous manner as in the first embodiment of the invention. Before screwing, the mass 17 fills the volume V almost completely and thereby presses the disc 20 against the bottom of the housing 36 opposite the cover 38. During the screwing, the clamping sleeve 19 is pulled out of the damper 16 and presses the mass 17 onto it a measure setting a certain identifier. This dimension is limited by an abutment shoulder formed in the receptacle 34 as a stop 44. When the tension screws 35 are loosened or tightened, the clamping sleeve 19 is prevented from rotating with respect to the mass 17 or rotation of the mass 17 with respect to the housing 36 by the ribs 42 engaging in the recesses 43 or by the lugs 40 engaging in the recesses 39 . The forces introduced by the lag screws 35 into the air collector 10 are supported, for example, by suction pipes (not shown) of the intake system 3.

Claims (9)

  1. An intake unit for a multiple-cylinder internal-combustion engine, wherein the intake unit is held insulated from vibration above the cylinders on the internal-combustion engine, which comprises first insulating members between the intake unit (3) and the cylinder head (4) and further insulating members, comprising seals (25), between the individual intake pipes (11) and the cylinder head (4), characterized in that the first insulating members are arranged between retaining members (15), connected to the cylinder head (4), and the intake unit and are constructed as damping devices (16) comprising cup-like housings which are held detachably on the internal-combustion engine (1) and in each of which is provided a rubber mass (17) traversed by a clamping sleeve (19) which is provided with a disc (20) arranged at the end and in which a tension bolt (35) support[ed] in a receiving means (34) in the intake unit (3) is secured, and the further insulating members are subjected to pressure by way of the tension bolts (35).
  2. An intake unit according to Claim 1, characterized in that intake-pipe sockets (12) are arranged between the seals (25) and a flange surface (6) as part of the intake unit (3), and fastening pipes (14) for the damping devices (16) are arranged between adjacent intake-pipe sockets (12).
  3. An intake unit according to Claim 2, characterized in that the fastening pipes (14) and the intake-pipe sockets (12) of one cylinder row (2) of the internal-combustion engine (1) are constructed integrally as a bridge (13) held detachably secured to the flange surface (6) by means of the fastening pipes (14).
  4. An intake unit according to Claim 3, characterized in that the damping devices (16) are arranged on retaining members constructed integrally with a fastening pipe (14) as arms (15) and extending transversely to the bridge (13) as far as immediately against the cylinder head (4).
  5. An intake unit according to Claim 4, characterized in that the seals (25) of one cylinder row (2) adjoining the individual intake pipes (11) are constructed integrally as sealing strips (26).
  6. An intake unit according to one or more of the preceding Claims, for an eight-cylinder internal-combustion engine with two rows of cylinders, characterized in that a bridge (13) with four respective intake-pipe sockets (12) is associated with each cylinder row (2), wherein one fastening pipe (14) with an arm (15) and a damping device (16) is arranged between the first and the second and between the third and the fourth intake-pipe sockets (12) respectively.
  7. An intake unit according to Claim 1, characterized in that the receiving means (34) guiding the tension bolts (35) have a stop (44) against which the clamping sleeves (19) rest after the said tension bolts (35) have been screwed in.
  8. An intake unit according to one or more of the preceding Claims, characterized in that ribs (42) are arranged extending radially downwards on the disc (20) from a sleeve member (41), and the mass (17) has corresponding recesses (43).
  9. An intake unit according to one or more of the preceding Claims, characterized in that a housing (36) of the damping device (16) has a continuous corrugation (37) for receiving a cover (38) through which the clamping sleeve (19) passes.
EP92105425A 1991-05-22 1992-03-30 Intake device for a multicylinder internal combustion engine Expired - Lifetime EP0514646B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4116653A DE4116653A1 (en) 1991-05-22 1991-05-22 INTAKE SYSTEM FOR A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
DE4116653 1992-05-22

Publications (2)

Publication Number Publication Date
EP0514646A1 EP0514646A1 (en) 1992-11-25
EP0514646B1 true EP0514646B1 (en) 1995-11-08

Family

ID=6432151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105425A Expired - Lifetime EP0514646B1 (en) 1991-05-22 1992-03-30 Intake device for a multicylinder internal combustion engine

Country Status (4)

Country Link
US (1) US5220889A (en)
EP (1) EP0514646B1 (en)
JP (1) JPH05187334A (en)
DE (2) DE4116653A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125249C2 (en) * 1991-07-31 1994-03-03 Freudenberg Carl Fa Elastic fastening device for connecting an intake pipe to an internal combustion engine
DE4343373C2 (en) * 1993-01-20 2002-06-20 Volkswagen Ag Reciprocating internal combustion engine
DE4326160A1 (en) * 1993-08-04 1995-02-09 Daimler Benz Ag Combustion air feed system for multi-cylinder internal combustion engines
US5947483A (en) * 1993-12-10 1999-09-07 Firma Carl Freudenberg Seal for the gas-tight mounting of an intake manifold on the cylinder head of an internal combustion engine
DE4413393C1 (en) * 1994-04-18 1995-06-08 Freudenberg Carl Fa Elastic attachment of supercharger to engine
DE4413392C1 (en) * 1994-04-18 1995-06-08 Freudenberg Carl Fa Elastic attachment of supercharger to IC engine
JP3225731B2 (en) * 1994-05-09 2001-11-05 日産自動車株式会社 Support structure of intake manifold
JP2864365B2 (en) * 1996-04-16 1999-03-03 本田技研工業株式会社 Engine intake system
US6502540B1 (en) 1999-01-19 2003-01-07 Alvin J. Smith Internal combustion engine gas flow control
DE19927768A1 (en) * 1999-06-17 2000-12-21 Volkswagen Ag Drive unit with vibration damping
DE50013694D1 (en) 2000-09-08 2006-12-14 Abb Turbo Systems Ag Fastening device for a filter silencer at the compressor inlet of a turbocharger
EP1430214B1 (en) * 2001-07-31 2012-05-30 MANN+HUMMEL GmbH An air intake and a method for installing an air intake
DE10317997B3 (en) * 2003-04-19 2004-04-08 Audi Ag Vibration-absorbing support for attaching suction pipe system to IC engine comprises bar embedded in elastomer, threaded connectors being mounted at each end with decoupling bridges which separate them from bar
DE102011116299A1 (en) * 2011-10-18 2013-04-18 Daimler Ag Intake module for an internal combustion engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315012A1 (en) * 1975-06-20 1977-01-14 Berliet Automobiles Lug and bolt mount for inlet manifold of IC engine - has elastomeric gaskets, bushes and washers insulating manifold from vibration
JPS5982567A (en) * 1982-11-02 1984-05-12 Honda Motor Co Ltd Suction system support construction for engine
DE3432608A1 (en) * 1984-09-05 1986-03-13 Klöckner-Humboldt-Deutz AG, 5000 Köln Flexible coupling of a pipe system to an internal combustion engine
FR2574475B1 (en) * 1984-12-11 1988-11-18 Peugeot DEVICE FOR FIXING AND SEALED CONNECTION OF A TUBING TO A CYLINDER HEAD OF A COMBUSTION ENGINE
DE3641811C1 (en) * 1986-12-06 1988-05-26 Porsche Ag Intake system for a preferably multi-cylinder internal combustion engine
DE3643196C1 (en) * 1986-12-18 1992-08-27 Bayerische Motoren Werke Ag Intake system for internal combustion engines
DE3730817A1 (en) * 1987-09-14 1989-03-23 Porsche Ag CYLINDER HEAD COVER WITH SUCTION PIPE SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
US4901681A (en) * 1988-08-26 1990-02-20 General Motors Corporation Motion isolated engine manifold

Also Published As

Publication number Publication date
EP0514646A1 (en) 1992-11-25
JPH05187334A (en) 1993-07-27
DE59204231D1 (en) 1995-12-14
DE4116653A1 (en) 1992-11-26
US5220889A (en) 1993-06-22

Similar Documents

Publication Publication Date Title
EP0514646B1 (en) Intake device for a multicylinder internal combustion engine
DE102007061487A1 (en) System and method for securing fuel injectors
EP0343565A2 (en) Charged-air cooler, sealing and method of assembling the cooler
DE19920822A1 (en) Method for securing exhaust manifold to cylinder head of IC engine has spacers loosely fitted onto the manifold studs to allow the manifold flange to move with thermal expansion
WO1990013740A1 (en) Fuel distributor for fuel injection installations in internal combustion engines
EP1350023B1 (en) Arrangement for the gas-tight fixing of an inlet manifold with a connector flange to the cylinder head of an internal combustion engine
DE2742296A1 (en) DEVICE FOR CONNECTING A SINGLE-PIECE EXHAUST MANIFOLD TO THE CYLINDER HEADS OF MULTI-CYLINDER, IN-LINE COMBUSTION ENGINES
EP0627553A1 (en) Holding device for a fuel injection valve in a diesel engine
EP0757172A2 (en) Combustion engine with suction module or suction conduit fixed to it and method of fixing a suction module or a suction conduit to an engine
DE19522869A1 (en) Driving plate between an internal combustion engine of the reciprocating piston type and a converter
DE19960223A1 (en) Suction module for an internal combustion engine
EP2546504B1 (en) Internal combustion engine
AT509691A1 (en) INTERNAL COMBUSTION ENGINE WITH A CONNECTION ASSEMBLY FOR A CYLINDER HEAD
DE102005009118A1 (en) Cylinder head for a direct-injection internal combustion engine
DE19541676A1 (en) Exhaust manifold connection
DE29708541U1 (en) Reciprocating engine with split cylinder head cover
DE10041484B4 (en) Internal combustion engine, in particular for motorcycles
EP1310669A2 (en) Fuel injector with simple mounting structure through an integral valve cover
EP0270783B1 (en) Intake arrangement for a preferably multicylinder internal combustion engine
EP0071778B1 (en) Air cooled multi-cylinder internal-combustion engine with overhead camshaft
DE19750284C2 (en) Holding device for a component
DE102007050512A1 (en) Internal combustion engine with fuel injectors
DE102005056244B4 (en) Exhaust system for an internal combustion engine
DE4117181C1 (en) Ignition coil arrangement for IC engine - has laminated core mounted on earthing bolts gripped by sprung spacers which thermally decouple coil from engine
DE102020005936A1 (en) Screw connection for an exhaust manifold

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 IT SE

17P Request for examination filed

Effective date: 19930401

17Q First examination report despatched

Effective date: 19930527

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 IT SE

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

REF Corresponds to:

Ref document number: 59204231

Country of ref document: DE

Date of ref document: 19951214

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

Effective date: 19951220

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

Ref country code: SE

Effective date: 19960331

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
EUG Se: european patent has lapsed

Ref document number: 92105425.0

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

Ref country code: DE

Payment date: 19980313

Year of fee payment: 7

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

Ref country code: GB

Payment date: 19980323

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19980330

Year of fee payment: 7

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: 19990330

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

Effective date: 19990330

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: 19991130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: 20000101

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050330