EP1752627B1 - Dispositif pour le circuit d'huile d'un moteur à combustion interne - Google Patents

Dispositif pour le circuit d'huile d'un moteur à combustion interne Download PDF

Info

Publication number
EP1752627B1
EP1752627B1 EP20060117118 EP06117118A EP1752627B1 EP 1752627 B1 EP1752627 B1 EP 1752627B1 EP 20060117118 EP20060117118 EP 20060117118 EP 06117118 A EP06117118 A EP 06117118A EP 1752627 B1 EP1752627 B1 EP 1752627B1
Authority
EP
European Patent Office
Prior art keywords
expansion element
component
switching valve
oil
port
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 - Fee Related
Application number
EP20060117118
Other languages
German (de)
English (en)
Other versions
EP1752627A2 (fr
EP1752627A3 (fr
Inventor
Claudia Knejfl
Benoit Monzie
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.)
Mahle International GmbH
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1752627A2 publication Critical patent/EP1752627A2/fr
Publication of EP1752627A3 publication Critical patent/EP1752627A3/fr
Application granted granted Critical
Publication of EP1752627B1 publication Critical patent/EP1752627B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control

Definitions

  • the invention relates to a flow device within an oil circuit of an internal combustion engine according to the preamble of patent claim 1.
  • the heat exchanger is always flowed through in a lower temperature range and that at least with a predominant volume flow rate.
  • the heat exchanger should be acted upon in the lower temperature range by the complete oil volume flow.
  • From the DE 37 19 843 A1 is another flow device within an oil circuit of an internal combustion engine known.
  • the invention is concerned with the problem of preserving the oil circulation in the lower temperature range at particularly low temperatures from an excessively high pressure loss through a flow through the heat exchanger in a generic flow device.
  • the invention according to claim 1 is based on the general idea, on the one hand at particularly low temperatures in the lower temperature range for the fullest possible flow around, that is to provide a bypass of the circulating oil flow to the heat exchanger and on the other hand to provide a single multi-way switching valve, all operational desired flow paths automatically switched automatically within the oil circuit.
  • a three / three-way switching valve 1 is provided in a housing which may be part of a filter and / or heat exchanger housing in an oil circuit of an internal combustion engine of a motor vehicle.
  • This switching valve 1 has three ports, namely a port A, is supplied by the lubricating oil from the circuit when using the switching valve 1 in the oil circuit of an internal combustion engine, a port B, from which the lubricating oil is passed to the engine and a port C, through the cycle oil can be introduced, which has previously flowed through a heat exchanger.
  • the oil flows that can be supplied through the ports A and C the switching valve 1, are controllable, depending on the temperature of the in the switching valve. 1 entering oil and a pressure difference between the terminals A and C.
  • the switching valve 1 comprises a thermostat as an expansion element 2, which is displaceable longitudinally displaceable under the load of a first compression spring 3 in a longitudinal direction stepped cylindrical cavity.
  • the expansion element 2 is composed of two telescopically mutually displaceable components and that of a first component 4 and a second component 5. These two components 4, 5 move mutually relative to each other in temperature changes.
  • the expansion element 2 is supported above particularly low temperatures exclusively via the first component 4 axially in the housing and against the force of the first compression spring 3. This type of support is in Fig. 1B , C, represented.
  • the second component 5 of the expansion element 2 is supported in a region directly upstream of the connection A on the housing. This support is such that thereby the flow cross-section of the terminal A is sealed, so that in this state of the expansion element 2, a flow through the port A is blocked.
  • a closure function of the expansion element 2 is a prerequisite that the change in the total length of the expansion element by a displacement of the first component. 4 takes place within the second component 5 of the expansion element 2 due to temperature.
  • the axial end On the circumference of the second component 5 of the expansion element 2 is slidably mounted a ring cage 6, the axial end has a first region 7 in the form of an axially permeable annular collar and axially the other end a second region 8 in the form of a collar.
  • the annular collar of the second region 8 is axially impermeable.
  • the two annular collars of the first and second regions 7, 8 lie with a respective cylindrical outer circumference slidably sealed in the cylindrical cavity of the housing of the switching valve 1 at.
  • a radially outwardly projecting third annular collar 9 is provided.
  • the ring cage 6 is acted upon axially on both sides by a respective compression spring and at one end by the first compression spring 3 and the other end by an oppositely acting, on the second component 5 of the expansion element 2 supporting second compression spring 10.
  • the stiffness of the second compression spring 10 exceeds that of the first Compression spring 3.
  • the annular collar of the second region 8 of the ring cage 6 has radially inward distance from the outer circumference of the second component 5 of the expansion element 2, so that oil can flow through the annular gap given thereby.
  • the ring cage 6 At the axial end of the ring cage 6, which is defined by the second region 8, the ring cage 6 has axially extending webs 11 which are elastically deformable in the radial direction and have inwardly projecting barbs 12 at their free ends.
  • the ring cage 6 is mounted on the second component 5 of the expansion element 2 in such a way that the barbs 12 engage behind the third annular collar 9 provided on the second component 5. In this way, the second compression spring 10, the ring cage 6 maximum up to a stop of the barbs 12 to the third annular collar 9 in the direction of the first compression spring 3 facing the end of the expansion element 2 move.
  • the third annular collar 9 on the second component 5 of the expansion element 2 has on its outer circumference radially outwardly projecting feet 13 for a centric guidance of the expansion element 2 within the cylindrical recess of the switching valve. 1
  • annular collar of the second region 8 of the annular cage 6 and the third annular collar 9 of the second component 5 of the switching valve 1 are dimensionally coordinated such that they at an axial contact an oil flow between the inner circumference of the cylindrical recess of the switching valve 1 and in the axial region of this cylindrical recess located second component 5 of the expansion element 2 lock, that means that in this state in this area no oil can flow.
  • the switching valve 1 can on the design of its two compression springs, that is, the first and second compression spring 3, 10, and the temperature dependence of serving as a thermostat expansion element 2 and the nature of the storage of the expansion element 2 within the housing of the switching valve 1 depending on the pressure and temperature conditions work as follows.
  • a differentiated behavior can be achieved for a lower, medium and high temperature range.
  • the lower temperature range can still be subdivided into a range of particularly low temperatures and an area with overlying temperatures.
  • the switching valve according to the invention allows a total of four flow modes with respect to the above four temperature ranges.
  • FIG Fig. 3 Before discussing these temperature ranges in detail, reference is made to a flow chart in FIG Fig. 3 on the essential components of an engine lubricating oil circuit and as a prerequisite for understanding the four switching states of the switching valve 1 in a flow device according to the invention.
  • Circulating oil is supplied from a reservoir 14 to an internal combustion engine 15 via the switching valve 1.
  • the extracted from the reservoir 14 oil flow leads a line 19 to a filter 16, which may be equipped with a lying in a first bypass line 20 by-pass valve 18.
  • a heat exchanger 17 is arranged with a bypass line 21 bypassing this in line 19.
  • the heat exchanger 17 is the conventional radiator of the internal combustion engine 15 in a motor vehicle.
  • the first bypass line 20 is likewise connected on the one hand to the second bypass line 21 and on the other hand to the region of the line 19 lying between the filter 16 and the heat exchanger 17.
  • the aforementioned four switch positions, which can take the inventive switching valve 1 in such an oil circuit are in the four sections a to d of Fig. 1 and can be defined with respect to different temperature ranges and pressure differences within the switching valve between the terminals A and C as follows.
  • Fig. 1c illustrated switching state of the switching valve 1
  • the port A is completely closed for a flow and the port C fully open.
  • the closure of the connection A that is a closure against oil coming from the filter 16 is achieved by contacting the annular collar of the second region 8 of the annular cage 6 with the third annular collar connected to the second component 5 of the expansion element 2.
  • this switching state is a shortening of the clamping length of the second compression spring 10 before.
  • the above-indicated temperature ranges may be defined as follows, for example lower temperature range: up to 80 ° C, medium temperature range: above 80 ° C to 120 ° C, high temperature range: above 120 ° C.
  • the switching valve 1 represents practically a further development of that cited in the introduction to the prior art DE 199 43 294 A1 in which, in addition to a constructive deviating structure, in particular the function has been extended in the lower temperature range.
  • the set out for a switching valve in that prior art font operating conditions of the oil circuit in which that previously known valve is used therefore, in principle, also apply to the subject of the invention development. It is therefore expressly made to the statements in that older document as background to the present invention reference.
  • At least one of the oil volume flows which are indicated with “at least predominantly”, “not predominantly” or “possibly a volumetric flow proportion” is in each case to the maximum extent possible, that is to say “not” or “completely”. is present, with the maximum possible measure at "at most” means zero.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (2)

  1. Dispositif d'écoulement à l'intérieur d'un circuit d'huile d'un moteur à combustion interne comportant un filtre, un échangeur thermique (17) et un actuateur multivoies (1) travaillant au moins partiellement en fonction de la température de l'huile de circuit, dans lequel de l'huile de circuit,
    - au moins une fraction de débit volumique non prédominante dans une plage de température moyenne située entre une plage de température supérieure et une plage de température inférieure,
    - au moins une fraction de débit volumique prédominante dans une plage de température supérieure,
    traverse l'échangeur thermique (17),
    dans lequel des positions de commutation de l'actuateur (1) sont prévues, d'après lesquelles l'échangeur thermique (17) peut être traversé dans une plage de température inférieure en fonction de la perte de pression de courant d'huile survenant dans l'échangeur thermique (17) et notamment en cas d'une chute de pression,
    - à partir d'une valeur limite supérieure, prescriptible G avec dans tous les cas une fraction de débit volumique,
    - en dessous de cette valeur limite G avec une fraction de débit volumique au moins prédominante,
    caractérisé par les caractéristiques
    - l'actuateur (1) est réalisé comme un actuateur trois/trois voies, avec des raccords A,B,C, desquels le raccord A est sollicité par un courant d'huile s'écoulant dans une dérivation vers un échangeur thermique (17), le raccord B évacue l'huile introduite dans l'actuateur et le raccord C introduit l'huile s'écoulant hors de l'échangeur thermique (17) et un élément de commande avec un élément d'expansion (2) variable en volume en fonction de la température, qui est positionné de manière contrainte par ressort dans le logement de l'actuateur (1), dans lequel l'élément d'expansion (2) est constitué d'un premier et un deuxième composant (4,5), qui sont déplaçables l'un contre l'autre de manière télescopique et desquels dans la direction axiale un peut s'appuyer en tant que premier composant (4) directement et le deuxième composant (5) indirectement via un premier ressort de pression (3) dans le logement de vanne,
    - l'élément d'expansion (2) obture dans une plage de température inférieure en dessous d'une valeur limite prescriptible G pour une différence de pression à l'intérieur de l'actuateur (1) entre les raccords A et C le raccord A par contrainte par ressort, dans lequel la charge de ressort prévue permet en présence d'une pression d'huile prévalente sur le raccord A au dessus de la pression limite G de la différence de pression une ouverture par déplacement de la totalité de l'élément d'expansion constitué du premier et du deuxième composant (4,5),
    - le deuxième composant (5) de l'élément d'expansion (2) positionne un espaceur annulaire (6) déplaçable axialement sur celui-ci,
    - l'espaceur annulaire (6) possède à une extrémité une première zone d'extrémité et à une autre extrémité une seconde zone d'extrémité (7,8), desquelles la deuxième zone d'extrémité (8) est tournée vers le premier composant (4) de l'élément d'expansion (2),
    - l'espaceur annulaire (6) est sollicité par ressort de pression axialement des deux côtés et notamment d'un côté par le premier ressort de pression (3), s'appuyant sur le logement de vanne et d'un autre côté par le deuxième ressort de pression (10) s'appuyant sur le deuxième composant (5) de l'élément d'expansion (2), dans lequel le deuxième ressort de pression (10) possède une rigidité de ressort plus haute par rapport au premier ressort de pression (3),
    - la première zone (7) de l'espaceur annulaire (6) est réalisée de manière perméable axialement et sur sa circonférence extérieure comme un corps coulissant cylindrique d'obturation par rapport au raccord C,
    - la deuxième zone (8) de l'espaceur annulaire (6) possède un épaulement annulaire étanchéifiant par rapport au logement de vanne sur la circonférence, qui est coordonné à des fins de barrage d'une liaison entre le raccord A d'un côté et les raccords B,C d'un autre côté avec un épaulement d'étanchéité de butée sous la forme d'un troisième épaulement d'étanchéité (9) sur le deuxième composant (5) de l'élément d'expansion (2).
  2. Dispositif d'écoulement selon la revendication 1,
    caractérisé en ce que
    l'épaulement annulaire (6) présente des gradins flexibles élastiques (11) s'étendant axialement dans la direction radiale, avec des ardillons (12) prévus à leurs extrémités, par l'intermédiaire desquels ardillons (12) l'espaceur annulaire (6)peut s'appuyer sur le deuxième composant (5) de l'élément d'expansion (2) en sens opposé à la sollicitation par le deuxième ressort de pression (10).
EP20060117118 2005-07-29 2006-07-13 Dispositif pour le circuit d'huile d'un moteur à combustion interne Expired - Fee Related EP1752627B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510035533 DE102005035533A1 (de) 2005-07-29 2005-07-29 Strömungseinrichtung innerhalb eines Ölkreislaufs eines Verbrennungsmotors

Publications (3)

Publication Number Publication Date
EP1752627A2 EP1752627A2 (fr) 2007-02-14
EP1752627A3 EP1752627A3 (fr) 2009-06-17
EP1752627B1 true EP1752627B1 (fr) 2011-05-04

Family

ID=37546812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060117118 Expired - Fee Related EP1752627B1 (fr) 2005-07-29 2006-07-13 Dispositif pour le circuit d'huile d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1752627B1 (fr)
DE (2) DE102005035533A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015207232A1 (de) * 2015-04-21 2016-10-27 Mahle International Gmbh Thermostatventil
ITUB20160126A1 (it) 2016-02-04 2017-08-04 Ufi Filters Spa Assieme di filtrazione olio con gruppo valvola
DE102022208584A1 (de) 2022-08-18 2024-02-29 Mahle International Gmbh Flüssigkeitkühlmodul

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2427277B2 (de) * 1974-06-06 1978-09-21 Bayerische Motoren Werke Ag, 8000 Muenchen Vorrichtung zur Steuerung des Schmieröl-Druckumlaufsystems bei einer Brennkraftmaschine
DE2629730B2 (de) * 1976-07-02 1978-09-21 Bayerische Motoren Werke Ag, 8000 Muenchen Vorrichtung zur Steuerung des Schmieröl-Druckumlauf systems bei einer Brennkraftmaschine
DE2854762C2 (de) * 1978-12-19 1983-01-05 Bayerische Motoren Werke AG, 8000 München Vorrichtung zum Steuern des Schmieröl- Druckumlaufsystemes bei einer Brennkraftmaschine
JPS5960013A (ja) * 1982-09-30 1984-04-05 Hino Motors Ltd 内燃機関の水冷式オイルク−ラ
DE3408024A1 (de) * 1984-03-05 1985-09-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Thermostatregelung
US4512300A (en) * 1984-04-17 1985-04-23 Cummins Engine Company, Inc. Oil temperature control system for internal combustion engine
DE3715002A1 (de) * 1987-05-06 1988-11-17 Kloeckner Humboldt Deutz Ag Brennkraftmaschine, bei der oel zur schmierung und kuehlung eingesetzt ist, insbesondere fuer den fall, dass die oelkuehlung das einzige kuehlsystem der brennkraftmaschine darstellt
DE3719843A1 (de) * 1987-06-13 1988-12-22 Messerschmitt Boelkow Blohm Ventil zur regelung der oeltemperatur eines triebwerks
DE3924494A1 (de) * 1989-07-25 1991-01-31 Kloeckner Humboldt Deutz Ag Oeltemperaturregelung
DE4123642A1 (de) * 1991-05-25 1992-11-26 Kloeckner Humboldt Deutz Ag Schmiersystem
DE19637299A1 (de) * 1996-09-13 1998-03-19 Daimler Benz Ag Filtersystem insbesondere für das Schmiermittel einer Brennkraftmaschine
DE19943294A1 (de) * 1999-09-10 2001-03-15 Mahle Filtersysteme Gmbh Strömungseinrichtung innerhalb eines Ölkreislaufes eines Verbrennungsmotors
DE10051780A1 (de) * 2000-10-19 2002-04-25 Daimler Chrysler Ag Druckregeleinheit für einen Ölkreislauf eines Kraftfahrzeugverbrennungsmotors
US6772958B1 (en) * 2003-04-28 2004-08-10 Rostra Precision Controls, Inc. Thermal flow control valve

Also Published As

Publication number Publication date
EP1752627A2 (fr) 2007-02-14
DE502006009426D1 (de) 2011-06-16
EP1752627A3 (fr) 2009-06-17
DE102005035533A1 (de) 2007-02-08

Similar Documents

Publication Publication Date Title
DE102017124727A1 (de) Steuerungsventil
DE202008014212U1 (de) Wärmetauscher mit Umgehungsventil
DE102016104560A1 (de) Hydraulikventil für einen Schwenkmotorversteller einer Nockenwelle
DE102016209592B4 (de) Ventil für ein Fahrzeug
DE102012221720A1 (de) Nockenwellenverstelleinrichtung und Zentralventil für eine Nockenwellenverstelleinrichtung
EP3136035B1 (fr) Échangeur thermique à plaques comprenant une dérivation et procédé de fabrication d'un échangeur thermique à plaques comprenant d'une dérivation
DE1601729B2 (de) Mit Vorsteuerung arbeitende hydraulische SteuerventUeinrichtung
EP3387225A1 (fr) Système d'alimentation en fluide
DE102011056774A1 (de) Ventil für ein Fahrzeug
EP1752627B1 (fr) Dispositif pour le circuit d'huile d'un moteur à combustion interne
EP3452705B1 (fr) Système d'alimentation en fluide
DE102013223016A1 (de) Ventil
EP1688637A1 (fr) Ressort à gaz
DE10080301B4 (de) Nockenwellenstellvorrichtung und Steuerventil mit Leckageausgleich
EP3530892B1 (fr) Soupape hydraulique pour un dispositif de réglage de moteur oscillant d'un arbre à cames
WO2009130125A1 (fr) Échangeur de chaleur, notamment refroidisseur d'huile
EP1350551B1 (fr) Dispositif à vannes, particulièrement pour le circuit de graissage d'un moteur à combustion interne, comprennant une vanne à contourner et une vanne unidirectionale
DE102019101115A1 (de) Hydraulikventil für einen Schwenkmotorversteller einer Nockenwelle
EP2626526B1 (fr) Dispositif de soupape
DE202015009000U1 (de) Fluidversorgungssystem einer Brennkraftmaschine
EP2866116A2 (fr) Valve thermostatique
EP0935716B1 (fr) Systeme de valve anti-retour
DE2838657A1 (de) Stroemungsmittelgekuehlte waermeaustauscheranordnung
DE69916573T2 (de) Steuerventil eines hydromotors
DE102015007974B3 (de) Antriebseinrichtung sowie Verfahren zum Betreiben einer Antriebseinrichtung

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: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20090828

AKX Designation fees paid

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502006009426

Country of ref document: DE

Date of ref document: 20110616

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502006009426

Country of ref document: DE

Effective date: 20110616

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20120207

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006009426

Country of ref document: DE

Effective date: 20120207

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

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

Ref country code: IT

Payment date: 20210722

Year of fee payment: 16

Ref country code: FR

Payment date: 20210726

Year of fee payment: 16

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

Ref country code: DE

Payment date: 20210729

Year of fee payment: 16

Ref country code: GB

Payment date: 20210726

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502006009426

Country of ref document: DE

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

Effective date: 20220713

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: 20220731

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: 20220713

Ref country code: DE

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

Effective date: 20230201

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

Effective date: 20220713