EP1080298B2 - Ölabscheider zur entölung von kurbelgehäuse-entlüftungsgasen einer brennkraftmaschine - Google Patents

Ölabscheider zur entölung von kurbelgehäuse-entlüftungsgasen einer brennkraftmaschine Download PDF

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Publication number
EP1080298B2
EP1080298B2 EP00916937.6A EP00916937A EP1080298B2 EP 1080298 B2 EP1080298 B2 EP 1080298B2 EP 00916937 A EP00916937 A EP 00916937A EP 1080298 B2 EP1080298 B2 EP 1080298B2
Authority
EP
European Patent Office
Prior art keywords
oil
oil separator
internal combustion
combustion engine
cyclones
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
EP00916937.6A
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German (de)
English (en)
French (fr)
Other versions
EP1080298B1 (de
EP1080298A1 (de
Inventor
Jürgen BUSEN
Sieghard Pietschner
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.)
Hengst SE and Co KG
Original Assignee
Hengst SE and Co KG
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Application filed by Hengst SE and Co KG filed Critical Hengst SE and Co KG
Publication of EP1080298A1 publication Critical patent/EP1080298A1/de
Publication of EP1080298B1 publication Critical patent/EP1080298B1/de
Application granted granted Critical
Publication of EP1080298B2 publication Critical patent/EP1080298B2/de
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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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
    • F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the present invention relates to an oil separator for de-oiling crankcase ventilation gases of an internal combustion engine, the oil separator comprising a cyclone having a gas inlet connected to the crankcase of the internal combustion engine, a gas outlet connected to the intake manifold of the internal combustion engine and an oil outlet connected to an oil sump of the internal combustion engine ,
  • An oil separator of the above type is from the DE 42 14 324 C2 known.
  • this oil separator a single cyclone is used, which is sized in size so that it can process the maximum accumulating amount of vent gases.
  • As an essential feature is provided in this known oil separator that connects to the oil outlet of the cyclone a downpipe whose mouth is located below the oil level of the oil sump of the associated internal combustion engine, that housed in a lower cyclone-side housing part, normally open float valve kickback from the oil sump prevents the internal combustion engine, and that the entire oil separator is connected as an assembly with the downpipe separable.
  • this oil separator with the single cyclone has the disadvantage that it does not over the entire range of operating conditions of the internal combustion engine occurring in practice optimum oil separation result achieved.
  • the occurring different operating conditions of the internal combustion engine lead on the one hand to different sized volume flows of vent gases from the crankcase and on the other hand, a different degree of oil loading of these venting gases. Since a cyclone works optimally only for a certain, relatively narrow range of operating conditions of the internal combustion engine, undesired oil quantities still occur in operating conditions outside this optimum operating range in the gases discharged from the cyclone and fed to the intake air of the internal combustion engine.
  • the object is to provide an oil separator of the type mentioned, which avoids the disadvantages listed and in particular over a very large, all occurring in practice operating conditions of the internal combustion engine workspace optimal, i. ensures complete or almost complete separation of oil from the crankcase ventilation gases.
  • the oil separator according to the invention With the oil separator according to the invention, a substantial increase in the optimum working range of the oil separator is achieved compared to an oil separator with a single cyclone.
  • the oil separator shows a significantly improved separation efficiency at low flow rates of the crankcase ventilation gases and greater insensitivity to fluctuations in this volume flow.
  • a significantly reduced dependence of the separation efficiency and thus the efficiency of each currently existing operating conditions of the associated internal combustion engine is achieved, which substantially reduces the oil load of the intake air of the internal combustion engine and reduces the oil loss of the internal combustion engine via the crankcase ventilation.
  • each cyclone has to process a fraction of the crankcase ventilation gases corresponding to the number of cyclones, each cyclone can be made correspondingly smaller, in particular with a smaller diameter and, more importantly, with a correspondingly reduced height.
  • the overall size of the oil separator is advantageously compact, although in comparison to a conventional oil separator, the diameter can be slightly larger, but the overall height is considerably smaller. This provides a substantial facilitation in housing the oil separator in an engine compartment, such as a motor vehicle, where cramped conditions are often encountered.
  • the cyclones are designed with a tangential flow.
  • This tangential flow allows in particular a particularly compact design, which keeps the height of the cyclones low in comparison to an axial flow.
  • the main inflow channel and the individual inflow channels are expediently combined to form an inflow channel component.
  • Another step to reduce the parts of the oil separator is that the cyclone body component and the inflow channel component are combined to form a main component.
  • the individual cyclones and / or the associated supply and discharge lines can be integrated at least partially into one or more other components of the internal combustion engine.
  • the effort for the production and installation of the individual parts of the oil separator and / or its inlet and outlet lines can be reduced.
  • the installation space requirement for the individual parts of the oil separator and its supply and discharge lines can be further reduced.
  • the cylinder head cover or its air filter housing are particularly suitable as components of the internal combustion engine.
  • the components mentioned on the one hand offer free spaces or previous dead spaces in which the cyclones and other parts of the oil separator can be accommodated without additional space.
  • these components are in any case in the vicinity or in the course of the flow paths, which must cover the crankcase ventilation gas and the separated oil and the purified gas.
  • the two figures of the drawing show an embodiment of an oil separator 1, which comprises four cyclones 11, 12, 13, 14.
  • the cyclones 11-14 are combined to form a one-piece compact main component 10.
  • FIG. 1 Top right in FIG. 1 is a main inflow passage 20 can be seen, the outer, ie right end is formed as a transition piece 28 with a line connection piece 29 which is circular in cross-section.
  • the inflow channel 20 becomes flatter and, as shown in FIG. 1 is not visible, at the same time wider, its cross-sectional area remains substantially constant.
  • the inflow channel 20 is divided into four individual inflow channels or gas inlets 21 - 24, of which in FIG. 1 only the channel or inlet 22 to the second cyclone 12 is visible.
  • the incoming gas stream is distributed to the four cyclones 11-14, wherein in each case a tangential flow takes place. Due to this tangential flow, the gas flow is put into a turbulent flow, which ensures that entrained oil droplets precipitate on the inner surface of the cyclones 11-14 and flow down from there.
  • the freed of the oil droplets gas flow exits from each cyclone 11 - 14 through each associated gas outlet 31 - 34 upwards and passes through a collecting cap 38 in a line connection piece 39.
  • a gas line can be connected to an air intake tract of an associated Internal combustion engine leads.
  • the oil separated in the cyclones 11-14 flows downwards within the cyclones 11-14 and exits through an outlet 41-44 into a collection funnel 48 at the lower end thereof.
  • a line connection pipe 49 is provided at its lowest point, to which an oil return line to an oil sump of the associated internal combustion engine can be connected.
  • FIG. 2 shown cross section through the oil separator 1 is particularly the space-saving and compact arrangement of the four cyclones 11 - 14 can be seen.
  • the line connection piece 29 is visible, to which a line coming from the crankcase of the associated internal combustion engine can be connected, through which crankcase ventilation gas coming from the crankcase, charged with oil droplets, can be guided to the oil separator 1.
  • the main inflow channel 20 widened in the region of the transition piece 28 and, as with reference to FIG. 1 explained, flattening at the same time.
  • the main inflow channel 20 divides into four inflow channels or gas inlets 21-24, which are each assigned to one of the cyclones 11-14.
  • each inflow channel or gas inlet 21-24 leads tangentially into its associated cyclone 11-14.
  • the course is such that a clockwise gas flow results, while in the case of the cyclones 13 and 14 the gas flow takes place under left-hand rotation.
  • the view falls in each case through the associated gas outlet 31-34 onto the outlet 41-44 respectively arranged at the very bottom of the cyclone 11-14. At the very bottom is in the background in FIG. 2 still a small part of the collecting funnel 48 for the separated oil recognizable.
  • FIG. 2 illustrates that the incoming gas stream without deflection and thus virtually without increasing the flow resistance to the four individual cyclones 11 - 14 is distributed.
  • this can be made of a few individual parts, in the present example from the main component 10, the transition piece 28, the combined gas outlets 31-34, the collecting hood 38 and the collecting funnel 48.
  • connecting lines which are advantageously designed as hoses, as is known per se.
  • individual or all connecting lines, at least over sections, in other components of the internal combustion engine be integrated, which reduces the production and installation of separate lines or even makes completely unnecessary.
  • the said parts of the oil separator 1 are suitable die castings made of light metal or injection-molded parts made of plastic, wherein a plastic is to be selected, which is able to cope with the occurring thermal and chemical stresses.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cyclones (AREA)
EP00916937.6A 1999-03-18 2000-03-14 Ölabscheider zur entölung von kurbelgehäuse-entlüftungsgasen einer brennkraftmaschine Expired - Lifetime EP1080298B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19912271A DE19912271A1 (de) 1999-03-18 1999-03-18 Ölabscheider zur Entölung von Kurbelgehäuse-Entlüftungsgasen einer Brennkraftmaschine
DE19912271 1999-03-18
PCT/EP2000/002230 WO2000057038A1 (de) 1999-03-18 2000-03-14 Ölabscheider zur entölung von kurbelgehäuse-entlüftungsgasen einer brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1080298A1 EP1080298A1 (de) 2001-03-07
EP1080298B1 EP1080298B1 (de) 2003-07-30
EP1080298B2 true EP1080298B2 (de) 2018-08-29

Family

ID=7901552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00916937.6A Expired - Lifetime EP1080298B2 (de) 1999-03-18 2000-03-14 Ölabscheider zur entölung von kurbelgehäuse-entlüftungsgasen einer brennkraftmaschine

Country Status (7)

Country Link
US (1) US6279556B1 (ja)
EP (1) EP1080298B2 (ja)
JP (1) JP2002540338A (ja)
KR (1) KR100636758B1 (ja)
BR (1) BR0005393A (ja)
DE (4) DE19912271A1 (ja)
WO (1) WO2000057038A1 (ja)

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DE20023969U1 (de) 2008-03-06
DE20023968U1 (de) 2008-03-06
DE50003081D1 (de) 2003-09-04
DE19912271A1 (de) 2000-09-28
KR100636758B1 (ko) 2006-10-20
EP1080298B1 (de) 2003-07-30
EP1080298A1 (de) 2001-03-07
JP2002540338A (ja) 2002-11-26
WO2000057038A1 (de) 2000-09-28
US6279556B1 (en) 2001-08-28
KR20010071280A (ko) 2001-07-28

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