EP3763941A1 - Compresseur à piston axial d'un dispositif d'alimentation d'air comprimé pour automobiles - Google Patents

Compresseur à piston axial d'un dispositif d'alimentation d'air comprimé pour automobiles Download PDF

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Publication number
EP3763941A1
EP3763941A1 EP20183667.3A EP20183667A EP3763941A1 EP 3763941 A1 EP3763941 A1 EP 3763941A1 EP 20183667 A EP20183667 A EP 20183667A EP 3763941 A1 EP3763941 A1 EP 3763941A1
Authority
EP
European Patent Office
Prior art keywords
valve
plate
relief
piston compressor
cylinder
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.)
Granted
Application number
EP20183667.3A
Other languages
German (de)
English (en)
Other versions
EP3763941B1 (fr
Inventor
Faouzi BOUZIDI
Oliver Brandt
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.)
ZF CV Systems Europe BV
Original Assignee
Wabco Europe BVBA
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 Wabco Europe BVBA filed Critical Wabco Europe BVBA
Publication of EP3763941A1 publication Critical patent/EP3763941A1/fr
Application granted granted Critical
Publication of EP3763941B1 publication Critical patent/EP3763941B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/064—Cooling by a cooling jacket in the pump casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing

Definitions

  • the invention relates to a piston compressor of a compressed air supply system in motor vehicles, in particular in commercial vehicles, with a valve plate acting as a valve carrier, which is arranged between a cylinder housing and a cylinder head of the piston compressor and which, in addition to a suction valve and a pressure valve, has a relief valve for connecting one in the Has cylinder housing formed working space with a relief chamber arranged in the cylinder head and further a cooling channel for water cooling, especially the pressure valve.
  • the cylinder head of a piston compressor is usually made as a die-cast component from a light metal alloy and is usually screwed to the cylinder housing of the piston compressor via a valve plate that acts as a valve carrier and to which suction and pressure valves designed as lamellar valves are attached.
  • the cylinder head can also have a relief chamber.
  • the inlet chamber is connected to the environment via a filter arrangement and is connected in the suction tract of the associated piston to the working chamber of the cylinder housing via mostly several inlet channels arranged in the valve plate through an open suction valve designed as a lamellar valve, which is attached to the valve plate on the cylinder side .
  • the working space of the cylinder housing is connected to the outlet chamber, which is connected to a delivery line of the compressed air supply system, via at least one outlet channel arranged in the valve plate, through a pressure valve, which is then opened and designed as a lamellar valve, which is arranged on the head side of the valve plate .
  • the working chamber of the cylinder housing is connected to the relief chamber via at least one relief channel formed in the valve plate through a relief valve that is then open, so that the The working space of the cylinder housing is then enlarged by the relief chamber.
  • air is sucked from the inlet chamber and the relief chamber into the working space of the cylinder housing in the suction cycle and pressed into the relief chamber in the pressure cycle, so that the previously sucked in air is less strongly compressed. This reduces the drive power consumed by the piston compressor and the thermal load on the components of the piston compressor accordingly.
  • the relief valve can be designed as a piston valve arranged largely in the cylinder head or as a sliding plate valve mounted on the valve plate.
  • At least one cooling channel can be arranged in the valve plate, which runs at least around the outlet channel and cooling water flows through it when the piston compressor is in operation.
  • the DE 33 29 790 C2 describes a typical reciprocating compressor with a one-piece valve plate.
  • Several inlet channels, two outlet channels and two relief channels are formed in the valve plate.
  • the relief channels lead from the working space of the cylinder housing to the inlet chamber of the cylinder head and can be opened by means of a sliding plate.
  • the sliding lamella is arranged in a cylinder-side recess of the valve plate between the valve lamella of the suction valve and the inner wall of the recess and is articulated at one end.
  • the sliding plate is in an adjusting connection with a pressure-actuated adjusting cylinder, the components of which are arranged in a stepped bore in the valve plate.
  • the actuating cylinder When the piston compressor is idling, the actuating cylinder is pressurized with compressed air, whereby the sliding lamella is pivoted and the relief channels are opened. As a result, the air sucked in in the suction tract of the associated piston is pushed back into the inlet chamber in the pressure cycle.
  • the valve plate of this reciprocating compressor does not have a cooling channel.
  • valve plate of a reciprocating compressor has a cooling channel.
  • the valve plate consists of two plate halves which are roughly in the middle and are glued together, which are manufactured as die-cast components and, in addition to the inlet and outlet channels, also each have a circumferentially half-open cooling channel.
  • a sleeve or a hollow rivet is inserted into each of the outlet channels in order to protect the sealing adhesive layer from excessive exposure to heat.
  • valve plate of a reciprocating compressor provided with a cooling channel is from DE 10 2008 018 467 A1 known.
  • This valve plate is constructed in three parts and comprises a core plate, a cylinder-side base plate and a top-side cover plate.
  • the base plate is glued or soldered to the core plate, and a seal is arranged between the core plate and the cover plate.
  • a meandering opening of a cooling channel is formed in the base plate, which runs close to the outlet channels of the pressure valves and, in the assembled state, is bounded on the head side by the core plate and connected on the cylinder side to a coolant inlet and a coolant outlet of the cylinder housing.
  • valve plate of a reciprocating compressor provided with two cooling channels is described, which is constructed in two parts and has a core plate and a cover plate at the top.
  • the cover plate is glued or welded to the core plate.
  • the cooling channels which predominantly run near the outlet channels of the pressure valves, are designed as half-open channels in the core plate and, in the assembled state, are delimited on the head side by the cover plate.
  • the invention was based on the object of presenting a piston compressor for motor vehicles, in particular for utility vehicles of the type mentioned, the valve plate of which in addition to a suction valve and a pressure valve, it also has a relief valve and a cooling channel.
  • the valve plate is intended to enable effective cooling, particularly of the pressure valve, with the simplest and most compact structure possible.
  • the invention accordingly relates to a piston compressor of a compressed air supply system in motor vehicles, in particular in commercial vehicles, with a valve plate acting as a valve carrier, which is arranged between a cylinder housing and a cylinder head of the piston compressor, and which, in addition to a suction valve and a pressure valve, has a relief valve for connecting one in the Has cylinder housing formed working space with a relief chamber arranged in the cylinder head and further a cooling channel for water cooling, especially the pressure valve.
  • the valve lamellae of the suction valve and the pressure valve as well as the sliding lamella of the relief valve are fastened or stored on the base plate or the cover plate, which are made of a material with high heat resistance, so that a high stability and wear resistance of the fastenings and bearings of the Valve lamellas and the sliding lamella is given.
  • the construction of the suction valve and the pressure valve as lamellar valves and the relief valve as sliding lamellar valve and the arrangement of the actuating actuator in the core plate results in a very compact construction of the valve plate with a relatively low overall height.
  • the core plate preferably consists of a light metal alloy, in particular an aluminum alloy, since this material has a thermal conductivity that is approximately four times higher than steel.
  • the thermal conductivity for aluminum at 0 ° Celsius, for example, is 220 W / m ° K and for steel at 20 ° Celsius, for example, 46.5 W / m ° K.
  • the material of the core plate should therefore preferably have a thermal conductivity of more than 100 W / m ° K.
  • the core plate is preferably produced as a die-cast component, which is particularly cost-effective due to a low level of mechanical post-processing.
  • the base plate and the cover plate are preferably made of steel and are cut out and / or punched out of a steel sheet, since steel has a heat resistance approximately three times higher than aluminum, and cutting or punching out of a steel sheet is particularly cost-effective due to little mechanical post-processing.
  • the material of the base plate and the cover plate should therefore have a high temperature strength which is at least twice as high as the high temperature strength of aluminum.
  • the base plate and the cover plate are soldered to the core plate.
  • the known adhesives are sensitive to heat and tend to become brittle, so that the seal is no longer given after a certain period of operation.
  • the base plate and the cover plate are soldered to the core plate at least on their outer edges facing the core plate and on their inner edges lying in the outlet channel. In this way, a stable connection between the components and an effective sealing of the outlet channel are achieved.
  • the at least one cooling channel is preferably closed on the circumferential side and arranged completely within the core plate, which can be easily achieved in terms of casting by using appropriate casting cores and, due to the homogeneous environment of the cooling channel with the light metal alloy, optimal heat conduction into the Cooling channel flowing through cooling water and thus a good cooling of the pressure valve causes.
  • the at least one cooling channel preferably has a largely rectangular cross section, since this significantly increases the inner wall surface of the cooling channel, which acts as a contact area between the core plate and the cooling water, compared to a cooling channel with a circular cross section.
  • Piston compressor 2 shown in a side view, of a compressed air supply system, which can be used, for example, in a motor vehicle to generate compressed air for a pneumatic brake system and / or an air suspension system, has a crankcase 4 and a cylinder housing 6 that is integrally connected to this and provided with cooling fins.
  • a crankshaft 8 is rotatably mounted in the crankcase 4 and can be driven by a drive motor.
  • a piston which cannot be seen, is guided in an axially movable manner in a cylinder bore of the cylinder housing 6 and is articulated to the crankshaft 8 via a connecting rod.
  • a valve plate 12, which acts as a valve carrier, and a cylinder head 16 provided with cooling fins are placed on the cylinder housing 6 with two flat seals 10, 14 in between, and fastened to the cylinder housing 6 by means of screws 18a, 18b.
  • the cylinder head 16 has an inlet chamber, an outlet chamber and a relief chamber.
  • the inlet chamber is connected to the environment via a filter arrangement not shown here and is connected in the suction cycle of the piston via a suction valve 28, which is then opened, to a working space of the cylinder housing 6 delimited by the piston and the valve plate 12 ( Fig. 2 ).
  • the working space of the cylinder housing 6 is connected via a pressure valve 38, which is then opened, to the outlet chamber, which is connected to a delivery line of the compressed air supply system.
  • the working space of the cylinder housing 6 is connected to the relief chamber via a then opened relief valve 48, so that the working space of the cylinder housing 6 is then enlarged by the relief chamber.
  • the valve plate 12 is constructed in three parts and consists of a cylinder-side base plate 20, a head-side cover plate 24 and a core plate 22 arranged between them.
  • the core plate 22 consists of a material with high thermal conductivity, in particular a light metal alloy or aluminum alloy, and is manufactured as a die-cast component .
  • the base plate 20 and the cover plate 24 consist of a material with high heat resistance, in particular steel, and they are cut out and / or punched out of a steel sheet.
  • In all three components 20, 22, 24 of the valve plate 12 there are four through bores 26a, 26b, 26c, 26d, through which the screws 18a, 18b are guided in the assembled state.
  • the suction valve 28 is designed as a lamellar valve and comprises a plurality of inlet channels 30 arranged in the shape of a circular arc in the valve plate 12 and having a circular cross-section as well as a valve lamella 32 which covers the inlet channels 30 and is provided with a central recess 34, which is arranged within a cylinder-side recess 36 of the floor panel 20.
  • the pressure valve 38 is designed as a lamellar valve and comprises an outlet channel 40 with an oval cross-section, which is arranged in the valve plate 12 radially inside the circular arc formed by the placement of the inlet channels 30, and a rectangular valve lamella 42 which covers the outlet channel 40 and is located on the head-side outer wall of the cover plate 24 is arranged.
  • the valve lamella 42 is displaceably guided with two bores on two screw bolts 44a, 44b which are fastened in corresponding threaded bores in the cover plate 24 and carry a catch plate 46 on the head side. The opening path of the valve lamella 42 is limited by the catch plate 46.
  • the relief valve 48 is designed as a slide lamellar valve and comprises two relief ducts 50 with an oval cross-section arranged in the valve plate 12 in the shape of a circular arc between the inlet ducts 30 and the outlet duct 40, as well as a sliding lamella 52 which is hinged on one side and which covers the relief ducts 50 and is mounted in the cylinder-side recess 36 of the Floor plate 20 is arranged between the valve lamella 32 of the suction valve 28 and the inner wall of the recess 36.
  • a pneumatically actuatable adjusting cylinder 54 is provided, the actuating piston 58 of which is in an actuating connection with the sliding lamella 52 at the end opposite the articulated bearing and is axially movable in a stepped bore 56 of the core plate 22.
  • the actuating piston 58 is loaded axially on the inside by a compression spring 60 designed as a helical spring.
  • a stop plug 62 is arranged axially outside in the bore 58 and is fixed by a locking ring 64 inserted into an annular groove.
  • a cooling channel 66 wrapping around the outlet channel 40 is formed, through which cooling water flows when the piston compressor 2 is in operation.
  • the cooling channel 66 is closed on the circumferential side, is located completely within the core plate 22 and has a largely rectangular cross section.
  • the base plate 20 and the cover plate 24 are soldered to the core plate 22.
  • the base plate 20 and the cover plate 24 on their outer edges facing the core plate 22 and are soldered to one another at their inner edges lying in the outlet channel 40 with the core plate 22.
  • valve lamella 32 of the suction valve 28 is elastically bent open in the direction of the piston due to the suction pressure applied in the area of the inlet channels 30, so that air flows from the inlet chamber of the cylinder head 16 into the working chamber of the cylinder housing 6.
  • the valve lamella 42 of the pressure valve 38 rests against the outer wall of the cover plate 24 due to the suction pressure applied so that the pressure valve 38 is then closed.
  • valve lamella 42 of the pressure valve 38 slides outwards due to the applied compression pressure on the screw bolts 44a, 44b until it makes contact with the catch plate 46, so that compressed air flows from the working space of the cylinder housing 6 into the outlet chamber of the cylinder head 16.
  • the valve lamella 32 of the suction valve 28 rests against the inner wall of the recess 36 in the floor panel 20 due to the compression pressure applied, so that the suction valve 28 is then closed.
  • the actuating cylinder 54 of the relief valve 48 is switched over by an external application of compressed air to the actuating piston 58 and the piston compressor 2 is thereby switched to idle mode.
  • the actuating piston 58 then moves inward in the bore 56 of the core plate 22 against the restoring force of the compression spring 60, as a result of which the sliding plate 52 of the relief valve 48 is pivoted according to the direction arrow 76 shown and the relief channels 50 largely open.
  • the working space of the cylinder housing 6 is thus enlarged by the volume of the relief chamber, so that air is sucked from the inlet chamber and the relief chamber into the working space of the cylinder housing 6 in the suction cycle and is pressed into the relief chamber in the pressure cycle.
  • the previously sucked in air is compressed less and the drive power absorbed by the piston compressor 2 and the thermal load on the components of the piston compressor 2 are correspondingly reduced.
  • the application of the actuating piston 58 with compressed air to switch the setting actuator 54 can be done passively, for example by connecting the bore 56 of the cylinder 54 via a pressure relief valve to the relevant pressure accumulator, or actively, for example by connecting the bore 56 of the cylinder 54 via a solenoid valve to a Compressed air source.
  • valve lamellae 32, 42 of the suction valve 28 and the pressure valve 38 as well as the sliding lamella 52 of the relief valve 48 are fastened or supported on the base plate 20 or the cover plate 24, which consist of a material with high heat resistance, so that a high stability and wear resistance of the fastenings and bearings of the valve lamellae 32, 42 and the sliding lamella 52 is given.
  • the cooling channel 66 in the core plate 22, which consists of a material with high thermal conductivity there is optimal cooling of the pressure valve 38, the components of which are strongly heated by the compressed air heated by compression.
  • An improvement in the cooling of the pressure valve 38 is also achieved by the largely rectangular cross section of the cooling channel 66, by means of which the inner wall surface thereof is significantly enlarged compared to a circular cross section.
  • suction valve 28 and the pressure valve 38 as lamellar valves and of the relief valve 48 as a sliding lamella valve and the arrangement of the actuating actuator 54 in the core plate 22 also result in a compact construction of the valve plate 12 with a relatively low overall height.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
EP20183667.3A 2019-07-10 2020-07-02 Compresseur à piston axial d'un dispositif d'alimentation d'air comprimé pour automobiles Active EP3763941B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019118653.6A DE102019118653A1 (de) 2019-07-10 2019-07-10 Kolbenkompressor einer Druckluftversorgungsanlage in Kraftfahrzeugen

Publications (2)

Publication Number Publication Date
EP3763941A1 true EP3763941A1 (fr) 2021-01-13
EP3763941B1 EP3763941B1 (fr) 2021-12-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20183667.3A Active EP3763941B1 (fr) 2019-07-10 2020-07-02 Compresseur à piston axial d'un dispositif d'alimentation d'air comprimé pour automobiles

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EP (1) EP3763941B1 (fr)
DE (1) DE102019118653A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1711400U (de) * 1955-02-24 1955-11-24 Motoren Werke Mannheim Ag Luftgekuehltes druckventil fuer luftverdichter.
EP0494590A1 (fr) * 1991-01-02 1992-07-15 Hoerbiger Ventilwerke Aktiengesellschaft Plaque à clapets pour des compresseurs à piston
DE4131886A1 (de) * 1991-09-25 1993-04-08 Daimler Benz Ag Ventilplatte eines kompressors
DE3329790C2 (de) 1983-08-18 1995-11-30 Wabco Gmbh Ventilträger für Kolbenverdichter
DE19631415C2 (de) 1995-08-11 1998-07-09 Knorr Bremse Systeme Ventilplatte für Kolbenverdichter, insbesondere für die Drucklufterzeugung in Kraftfahrzeugen
DE19833286A1 (de) 1997-07-26 1999-02-04 Knorr Bremse Systeme Verbesserter Gaskompressor
DE102008018467A1 (de) 2008-04-11 2009-10-15 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Ventilplatte für einen Kompressor und Verfahren zur Kühlung komprimierter Luft in einer Ventilplatte eines Kompressors
WO2011048456A1 (fr) * 2009-10-22 2011-04-28 Toyota Jidosha Kabushiki Kaisha Pompe à carburant
WO2011141225A2 (fr) * 2010-04-15 2011-11-17 Hoerbiger Kompressortechnik Holding Gmbh Culasse comprenant un compresseur d'air de frein
WO2012166051A1 (fr) * 2011-06-01 2012-12-06 Panasonic Corporation Plaque de clapet pour compresseur
WO2014023376A1 (fr) * 2012-08-10 2014-02-13 Wabco Gmbh Culasse de compresseur destinée à un compresseur, véhicule équipé de ladite culasse et procédé de refroidissement et de fabrication d'une culasse de compresseur de ce type
EP2708746A1 (fr) 2012-09-14 2014-03-19 Hoerbiger Kompressortechnik Holding GmbH Plaque de soupape creuse

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1711400U (de) * 1955-02-24 1955-11-24 Motoren Werke Mannheim Ag Luftgekuehltes druckventil fuer luftverdichter.
DE3329790C2 (de) 1983-08-18 1995-11-30 Wabco Gmbh Ventilträger für Kolbenverdichter
EP0494590A1 (fr) * 1991-01-02 1992-07-15 Hoerbiger Ventilwerke Aktiengesellschaft Plaque à clapets pour des compresseurs à piston
DE4131886A1 (de) * 1991-09-25 1993-04-08 Daimler Benz Ag Ventilplatte eines kompressors
DE19631415C2 (de) 1995-08-11 1998-07-09 Knorr Bremse Systeme Ventilplatte für Kolbenverdichter, insbesondere für die Drucklufterzeugung in Kraftfahrzeugen
DE19833286A1 (de) 1997-07-26 1999-02-04 Knorr Bremse Systeme Verbesserter Gaskompressor
DE102008018467A1 (de) 2008-04-11 2009-10-15 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Ventilplatte für einen Kompressor und Verfahren zur Kühlung komprimierter Luft in einer Ventilplatte eines Kompressors
WO2011048456A1 (fr) * 2009-10-22 2011-04-28 Toyota Jidosha Kabushiki Kaisha Pompe à carburant
WO2011141225A2 (fr) * 2010-04-15 2011-11-17 Hoerbiger Kompressortechnik Holding Gmbh Culasse comprenant un compresseur d'air de frein
WO2012166051A1 (fr) * 2011-06-01 2012-12-06 Panasonic Corporation Plaque de clapet pour compresseur
WO2014023376A1 (fr) * 2012-08-10 2014-02-13 Wabco Gmbh Culasse de compresseur destinée à un compresseur, véhicule équipé de ladite culasse et procédé de refroidissement et de fabrication d'une culasse de compresseur de ce type
EP2708746A1 (fr) 2012-09-14 2014-03-19 Hoerbiger Kompressortechnik Holding GmbH Plaque de soupape creuse

Also Published As

Publication number Publication date
DE102019118653A1 (de) 2021-01-14
EP3763941B1 (fr) 2021-12-01

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