EP3550119A1 - Moteur à combustion interne doté d'un système de purge d'air - Google Patents

Moteur à combustion interne doté d'un système de purge d'air Download PDF

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Publication number
EP3550119A1
EP3550119A1 EP19164618.1A EP19164618A EP3550119A1 EP 3550119 A1 EP3550119 A1 EP 3550119A1 EP 19164618 A EP19164618 A EP 19164618A EP 3550119 A1 EP3550119 A1 EP 3550119A1
Authority
EP
European Patent Office
Prior art keywords
strand
combustion engine
internal combustion
vent
vent line
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
EP19164618.1A
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German (de)
English (en)
Other versions
EP3550119B1 (fr
Inventor
Joris Walch
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.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
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 Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Publication of EP3550119A1 publication Critical patent/EP3550119A1/fr
Application granted granted Critical
Publication of EP3550119B1 publication Critical patent/EP3550119B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0285—Venting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/04—Arrangements of liquid pipes or hoses

Definitions

  • the present invention relates to an internal combustion engine having a ventilation system for a plurality of components and / or regions of the internal combustion engine, with a vent line, which connects vent openings of the plurality of components and / or areas with a tank and / or the environment, wherein the vent line a first Strand, which connects at least two vents in series.
  • Fig. 1a shown schematically, it may be in the internal combustion engine to an engine with multiple separate cylinder heads 1.
  • the cylinder heads each have a cooling system which must be vented via a vent opening 9 arranged on the cylinder head.
  • Such a ventilation system is also from the US Pat. No. 3,646,919 known.
  • pamphlet JP 01142212 A shows an internal combustion engine with a common cylinder head bank for all cylinders.
  • each ventilation opening for the Cooling system provided at a front and a rear end of the cylinder head rail.
  • the ventilation openings are connected via valves in each case with a strand of the ventilation line, wherein the two strands are guided together and connected to a third strand, which leads to the tank. In this way, a vent should be ensured even if the engine is arranged in an inclined position.
  • Object of the present invention is therefore to provide an internal combustion engine with a ventilation system available until a faster venting allows.
  • the present invention comprises an internal combustion engine with a ventilation system for a plurality of components and / or regions of the internal combustion engine, with a vent line which connects vent openings of the plurality of components and / or areas with a tank and / or the environment, wherein the vent line comprises a first Strand, which connects at least two vents in series.
  • the invention is characterized in that the vent line has at least one second strand, which is arranged parallel to the first strand in the vent line. This means that the first and second strand are not in series are switched, but the air streams in the first and second strand run separately from each other. Preferably, the air streams from the first and second strands are then combined at a point of the venting system.
  • venting of the components and / or regions is possible, in particular improved rapid venting, as is necessary when filling the components and / or regions for the first time.
  • the inventors of the present invention have recognized that in the case of a vent line with only one strand, which connects all components and / or regions in series, a flow reversal can occur in the region of those vent openings which are located at the beginning of the vent line in the flow direction the area 3 in Fig. 1b which shows by the arrows the flow direction within the ventilation system according to the prior art.
  • the many air, which flows downstream through the vent openings arranged there in the vent line presses so much back that escape from individual vents at the beginning of the vent line no air and sometimes even air is forced through the vents in the respective component or area. Nevertheless, in order to ventilate the internal combustion engine properly, a considerably lower ventilation or filling speed would have been necessary in the prior art.
  • At least one vent opening is provided, which is connected by the vent line to the tank and / or the environment.
  • the second strand of the vent line also connects at least two vent ports serially, i. There are also arranged in the second strand at least two vents in a row.
  • first strand and the second strand each connect at least three vents in series.
  • the vent line further comprises at least a third strand which is connected to the first and the second strand and connects them together with the tank and / or the environment.
  • the first and second strands are therefore merged at one point of the vent line, and the air from the first and second strands flows together from that point via the third strand to the tank or environment.
  • the third strand does not necessarily have to be designed as a tube element separate from the first and second strand.
  • the first can lead into the second strand, which forms the third strand from this point, or vice versa.
  • the three strands are formed by separate tubular elements which communicate with each other.
  • no vents are disposed in the third strand, i. it only serves to remove the air from the ventilation openings, which are arranged in the first and in the second strand.
  • the first and second strands each have a first end communicating with a first vent in the strands in the flow direction and a second end, the second ends of the first and second strands communicating with each other.
  • the strands are preferably designed so that air from the first vent only in one direction can drain through the respective strand to a subsequent vent opening or to the second end, that is, the first end is closed except for the connection to the first vent opening.
  • the first and the second parallel strand of the venting line in the region of a vent opening are in communication with the third strand. This results in a particularly simple structure.
  • connection of at least one of the strands with the vent can simultaneously serve to connect the strands to one another and to the third strand.
  • a connector element is provided, which serves the connection of the three strands with each other and the connection to the vent opening.
  • the vent line is an internal vent line extending, for example, within a cylinder head bank for internally connecting the vent openings of the respective cylinder head sections.
  • the vent line is an external vent line which communicates via connector elements with the vent openings of the internal combustion engine.
  • the vent line may consist of one or more tube elements, which are connected via connector elements with the vents.
  • the strands consist of tubular elements, which are connected by the connector elements not only with the vents, but also with each other.
  • At least one connector element is designed as a connector screw, which has an axial bore, which communicates fluidically with the vent opening, and at least one radial bore which is connected to the axial bore, wherein the connection with a strand of the vent line via a clamp which comprises the circumference of the screw plug in the region of the radial bore, and to which the vent line is connected.
  • all connector elements are designed as such connector screws.
  • the connector screw or connector screws may be bolted to provided in the housing of the engine vents.
  • At least one connector element has at least two radial bores spaced apart in the axial direction, which each interact with a clamp.
  • two pipe sections can be connected in the axial direction one above the other with the connector screw.
  • a first clamp is associated with the first parallel strand and a second clamp is associated with the second parallel strand to connect via the connector screw.
  • one of the two clamps has a further connection for connection to the third branch of the vent line.
  • the connection of the first, second and third strand therefore takes place via two clamps.
  • the connector element of the connection with the last in the flow direction of the vent opening of the first and second strand which is arranged through the connector element in two strands.
  • At least one connector element is designed as a connector screw, which has an axial bore, which fluidly communicates with the vent opening, and at least one radial bore, which is connected to the axial bore, the connection with a Strand of the vent line via a clamp takes place, which comprises the circumference of the screw plug in the region of the radial bore, and to which all three strands of the vent line are connected.
  • annular space is formed between an inner surface of the clamp and an outer surface of the screw plug, which connects the vent line connected to the clamp with the radial bore in the screw plug even if they are not in the same radial angular position on the Connector screw is arranged as the radial bore, and / or which connects a plurality of connected to the clamp strands of the vent line together.
  • the annular space is formed by a corresponding recess or a correspondingly curved shape in an inner surface of the clamp.
  • the vent openings are arranged in a row along the engine, the first and second strands serially interconnecting a group of vent apertures, respectively, wherein the first and second strands are the same flow direction with respect to one another Have vents.
  • the connection of the vents within the strands is therefore in the same direction which would be present in a single contiguous strand.
  • the ventilation openings may be the ventilation openings of the cylinder heads of a cylinder bank.
  • the first strand has for this purpose a first section which connects the first group of vent openings to one another, and a second section which serves for the connection of the first section to the second and / or third strand.
  • the second section may be guided past the second group of ventilation openings.
  • the second section is in the region of the last in the flow direction of the vent opening of the second strand with this and the third strand in combination.
  • a fixing element which fixes the first and / or the second strand in a region between two ventilation openings on the housing of the internal combustion engine.
  • the fixing element fixes the second portion of the first strand on the housing of the internal combustion engine, since this is longer than the remaining sections.
  • the fixing element can fix the first and the second strand together on the housing of the internal combustion engine.
  • the vent line comprises no further strands besides the first, second and third strands.
  • the vent line may also have other strands, which are tree-shaped and / or star-shaped in communication with the first, second and / or third strand.
  • the ventilation system preferably connects the plurality of components and / or regions of the internal combustion engine permanently and / or without intermediary valves to the tank and / or the environment.
  • the plurality of components and / or regions of the internal combustion engine are components and / or regions of a cooling system of the internal combustion engine.
  • the ventilation system is used to vent the cooling system of cylinder heads of the internal combustion engine.
  • the internal combustion engine has a separate cylinder head for each cylinder with at least one vent opening.
  • the vent line is preferably designed as an external vent line, which connects the vent openings to the tank and / or the environment.
  • all cylinder heads of a cylinder bank are connected to the tank and / or the environment via the first and the second line of the ventilation line. If a further cylinder bank is provided, it may have another ventilation system according to the invention.
  • the present invention further includes a venting system for an internal combustion engine as described above.
  • the venting system comprises a venting line which connects a plurality of venting openings to a tank and / or the environment, the venting line having a first branch which connects in series at least two venting openings.
  • the venting system is characterized in that the venting line has at least one second strand which runs parallel to the first strand.
  • the venting system further comprises a third strand as described above and / or connector elements as described above.
  • Fig. 2 shows a schematic representation of an embodiment of the internal combustion engine 4 according to the invention with a venting system according to the invention.
  • the internal combustion engine 4 has a plurality of components or regions 1 and 1 ', which each have a vent opening 9 or 9'. Furthermore, a vent line is provided, which connects the vent openings 9 and 9 'with a tank 8.
  • the tank 8 may be an expansion tank. Alternatively or additionally, the vent line could connect the vent openings 9 and 9 'with the environment.
  • the vent line comprises two parallel strands 5 and 6, wherein the first strand 5 serially connects the vent openings 9 of a first subset of components and / or areas 1, and the second one Strand 6, the vent openings 9 'of a second subgroup of components or areas 1' connected in series with each other. Furthermore, the vent line to a third strand 30, which is connected in series with the first strand 5 and the second strand 6 and connects them together with the tank 8 and the environment.
  • Fig. 2 in each of which the flow direction in the vent line is represented by arrows, the subdivision of the vent line into two parallel sub-strands ensures that all components and / or areas of the engine safely and quickly can be vented. This has the advantage, in particular in the case of an initial venting of the components and / or regions of the internal combustion engine, that it can take place considerably faster than in the prior art.
  • the components and / or areas 1 and 1 'and their vent openings 9 and 9' are arranged on the engine 4 in a row.
  • the first strand 5 and the second strand 6 connect the ventilation openings 9 and 9 'in such a way with the tank 8 or the environment that in both strands the same flow direction is present relative to the internal combustion engine. Therefore, in order to guide both strands together, the first strand 5 has a first region 7 which serially connects the venting openings 9, and a second partial region 8 which is geometrically past the venting openings 9 'of the second group of components and / or regions runs largely parallel to the second strand 6.
  • connection between the first and the second strand can thereby take place at one end of the components and / or regions of the internal combustion engine 9 and 9 'arranged in a row.
  • the venting system according to the invention can therefore be mounted in the same way on the internal combustion engine as a venting system according to the prior art, and in particular the same configuration of the third strand 30 use.
  • Air therefore flows in a venting of the components and / or regions 1 and 1 'from the in Fig. 2 shown on the right, in the flow direction first vent opening 9 through a first subsection of the first strand 5 in the direction of a location of the first strand, where it is in communication with the subsequent vent opening 9. From here, the air flows from the first and the second vent further together. At the point at which the first strand 5 communicates with the third vent 9, the air also flows out of it, so that in the second section 8 of the first strand 5, the air flows out of the first three vent openings. In the same way, the air flows from the second subgroup of components and / or regions 1 'via the respective vent openings 9' through the line sections of the second strand 6.
  • the first and the second strand unite in the region of the last vent opening 9 'of the second subgroup of components and / or regions 1 ', or upstream thereof.
  • the air from all the vents flows from there together through the third strand to the tank 8 or the environment.
  • the components and / or regions 1 and 1 'of the internal combustion engine in a preferred embodiment of the present invention are separate cylinder heads of a cylinder bank of the internal combustion engine. These each have a cooling system with its own vent, as with separate cylinder heads a central vent for all cylinder heads can not be used.
  • the ventilation system according to the invention now allows a fast filling of the engine, since now all cylinder heads are vented quickly in the same way.
  • the components and / or regions 1 and 1 ' may also be the areas of the cooling system of a related, associated with the individual cylinders, in particular one-piece cylinder head bank of an internal combustion engine act. Even with such a contiguous cylinder head bank, the individual cylinder heads or their cooling areas can each have separate ventilation openings, which can be better vented via an inventive ventilation system.
  • the ventilation system according to the invention can also be designed as an internal line system or partially internal line system of the cylinder head bank.
  • the venting system is designed as an external venting system, i. equipped with external vent lines, which are connected via connector elements with the vents of the components and / or areas.
  • the ventilation system according to the invention can also be used in other components and / or areas of internal combustion engines, in particular in the venting of other components and / or areas of the cooling system.
  • the components and / or regions may be the oil cooler, the intercooler, the intercooler, the EGR cooler, the thermostat housing, etc.
  • the ventilation system according to the invention can be used in both series and V engines.
  • the venting system is preferably designed such that all cylinder heads of a cylinder bank are vented via the first and second strands.
  • both cylinder banks preferably each have an inventive ventilation system with a first and a second parallel strand.
  • the third strands can be merged again. However, they can also be run separately to a tank and / or the environment.
  • FIG. 3 Now shows a concrete embodiment of a ventilation system according to the invention, which the in Fig. 2 shown construction corresponds. All explanations, with regard to Fig. 2 have been given, therefore apply in the same way for the embodiment in Fig. 3 , Furthermore, the same reference numerals have been used here.
  • FIG. 3 illustrated embodiment is an external venting system with external vent lines, which are connected via connector elements 10 to 13 with the vent openings, which are preferably provided in the housing of the internal combustion engine.
  • Preferred application example is also the venting of cylinder heads of a cylinder bank.
  • the individual strands of the vent line consist of pipe sections which connect the vent openings with each other and with the tank and / or the environment.
  • the connector elements 10 to 13 are used to connect the pipe sections with each other and with the vents.
  • the connector element 11 via which the second strand 6 communicates with the last vent opening in the flow direction, simultaneously serves to connect to the first strand 5 and the third strand 30.
  • the first strand 5 and the second strand 6 therefore unite in the region of the last vent to the common third strand 30 of the vent line.
  • the connector elements are designed as connector screws 10 and 11 with associated clamps 12 and 13, wherein the connector screws can be screwed into the housing of the internal combustion engine or the corresponding component. For this purpose, they have a thread 17.
  • the fluidic contacting of the ventilation openings takes place through an axial bore 18.
  • the Konnketorschraube is encompassed by a clamp 12 or 13, which serves to connect the radial bore 15 with the pipe sections of the vent line.
  • the clamps 12 and 13 each have at least one connecting piece 21 for connection to a pipe section of the vent line, in particular a pipe sleeve.
  • the clamps each have an annular space 20, which is formed between the peripheral wall of the connector screw and the inner wall of the respective clamp and thus surrounds the screw plug annular.
  • This embodiment has the advantage that the fluidic contacting between the respective pipe section and the radial bore 15 is possible independently of the radial position of the connection region 21 with the pipe section relative to the radial direction of the bore 15. Furthermore, the annular region 20 allows the connection of two pipe sections with each other.
  • the clamps 13 each have a connection region 21 at two different angular positions for connection to a pipe section.
  • clamps 13 are used with two connecting portions 21, which simultaneously serve the connection of two pipe sections, which are arranged serially within the strand, and the respective vent opening.
  • the connection with the first vent in the flow direction takes place in each strand, however, via a fast 12 with only one Connecting element 21 for the guided from this vent opening to the next vent opening pipe section.
  • two sealing disks 16 are used, of which one is arranged above and below the clamp and thus between the head of the screw plug and the clamp and between the clamp and the housing for a Seal ensures.
  • the gaskets can be metal disks with an integrated sealing arrangement.
  • Such a connector screw with a clamp is in Fig. 5 shown.
  • the connector screw 11 which serves to connect the two parallel strands 5 and 6 with the common third strand 30, is in contrast Fig. 6 shown.
  • the clamps and the connector screw correspond in structure to the in Fig. 5 illustrated embodiment.
  • the connector screw 11 has on two axial planes on a radial bore 15, wherein a first radial bore with a first clamp 12 and a second radial bore with a further clamp 13 cooperates. There are therefore two clamps arranged one above the other on the connector screw in the axial direction.
  • the clamp 13 is arranged in the embodiment in the first strand and simultaneously serves the connection to the third strand 30.
  • the second clamp 12, however, is arranged in the second strand 6 and therefore has only one connection region to this strand.
  • a fixing element 14 is furthermore provided in the exemplary embodiment fixed this second area 8 on the housing of the engine.
  • the fixing element 14 is configured in the exemplary embodiment so that it fixes both the second region 8 of the first strand 5 and a pipe section of the second strand 6 on the housing.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP19164618.1A 2018-04-05 2019-03-22 Moteur à combustion interne doté d'un système de purge d'air Active EP3550119B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00444/18A CH714873A1 (de) 2018-04-05 2018-04-05 Verbrennungsmotor mit einem Entlüftungssystem.

Publications (2)

Publication Number Publication Date
EP3550119A1 true EP3550119A1 (fr) 2019-10-09
EP3550119B1 EP3550119B1 (fr) 2023-04-26

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ID=65904336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19164618.1A Active EP3550119B1 (fr) 2018-04-05 2019-03-22 Moteur à combustion interne doté d'un système de purge d'air

Country Status (2)

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EP (1) EP3550119B1 (fr)
CH (1) CH714873A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841127A (en) * 1955-02-16 1958-07-01 White Motor Co Cooling system
US3646919A (en) * 1969-07-22 1972-03-07 Daimler Benz Ag Cooling water conductor system in reciprocating piston internal combustion engines
FR2388133A1 (fr) * 1977-04-19 1978-11-17 Renault Perfectionnement aux circuits de refroidissement de moteurs a combustion interne
WO2004076022A1 (fr) * 2003-02-27 2004-09-10 Scania Cv Ab (Publ) Installation permettant de separer un gaz d'un fluide
EP2789824A1 (fr) * 2013-04-11 2014-10-15 Bontaz Centre R&D Dispositif de refroidissement à encombrement reduit pour moteur à combustion interne et procédé de fabrication d'un tel dispositif

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19948160B4 (de) * 1999-10-07 2010-07-15 Wilhelm Kuhn Kühlvorrichtung für eine flüssigkeitsgekühlte Brennkraftmaschine eines Kraftfahrzeuges
GB0426647D0 (en) * 2004-12-04 2005-01-05 Ford Global Tech Llc An engine cooling system
DE102006019880A1 (de) * 2006-04-28 2007-10-31 Audi Ag Motorgehäusedeckel eines Verbrennungsmotors mit Entlüftungssystem
DE102007027719B4 (de) * 2007-06-15 2015-05-13 Audi Ag Brennkraftmaschine mit einem Heizungskreislauf und einem Kühlkreislauf

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841127A (en) * 1955-02-16 1958-07-01 White Motor Co Cooling system
US3646919A (en) * 1969-07-22 1972-03-07 Daimler Benz Ag Cooling water conductor system in reciprocating piston internal combustion engines
FR2388133A1 (fr) * 1977-04-19 1978-11-17 Renault Perfectionnement aux circuits de refroidissement de moteurs a combustion interne
WO2004076022A1 (fr) * 2003-02-27 2004-09-10 Scania Cv Ab (Publ) Installation permettant de separer un gaz d'un fluide
DE112004000363T5 (de) * 2003-02-27 2006-03-02 Scania Cv Ab Anordnung für das Abscheiden von Gas von einer Flüssigkeit
EP2789824A1 (fr) * 2013-04-11 2014-10-15 Bontaz Centre R&D Dispositif de refroidissement à encombrement reduit pour moteur à combustion interne et procédé de fabrication d'un tel dispositif

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Publication number Publication date
EP3550119B1 (fr) 2023-04-26
CH714873A1 (de) 2019-10-15

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