EP2021592B1 - Einrichtung für die entlüftung eines kurbelgehäuses - Google Patents

Einrichtung für die entlüftung eines kurbelgehäuses Download PDF

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Publication number
EP2021592B1
EP2021592B1 EP07728890A EP07728890A EP2021592B1 EP 2021592 B1 EP2021592 B1 EP 2021592B1 EP 07728890 A EP07728890 A EP 07728890A EP 07728890 A EP07728890 A EP 07728890A EP 2021592 B1 EP2021592 B1 EP 2021592B1
Authority
EP
European Patent Office
Prior art keywords
oil mist
mist separator
pump
oil
separator
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.)
Active
Application number
EP07728890A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2021592A2 (de
Inventor
Stefan Ruppel
Yakup ÖZKAYA
Klaus Beetz
Andreas Enderich
Gerd Kissner
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 EP2021592A2 publication Critical patent/EP2021592A2/de
Application granted granted Critical
Publication of EP2021592B1 publication Critical patent/EP2021592B1/de
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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • 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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F01M13/023—Control valves in suction conduit
    • 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
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase

Definitions

  • the invention relates to a device for the venting of a crankcase of an internal combustion engine according to the preamble of claim 1.
  • a device of the generic type is known from the practice of engine construction, especially for automobiles.
  • the object of such a device is to maintain a required for technical and legal reasons negative pressure in the crankcase of the internal combustion engine by the crankcase is vented.
  • negative pressure in the crankcase of the internal combustion engine by the crankcase is vented.
  • entrained oil fractions are separated in a ⁇ lnebelabscheider and the separated oil is preferably returned to the lubricating oil circuit of the internal combustion engine.
  • the gas released from the oil enters the intake pipe of the internal combustion engine and then passes through the combustion taking place in the cylinder.
  • a generic oil separator in which a fitted with an impeller rotor at the same time serves as a compressor and as a conveyor, whereby a particularly compact design to be achieved.
  • a device for the venting of a crankcase of an internal combustion engine is known, with a leading from the crankcase to an intake manifold of the engine vent line, in the course of which an oil mist separator is arranged.
  • a pump is arranged in the further course of the vent line, with the crankcase in the negative pressure relative to the ambient air pressure can be generated. This is intended to prevent an excessively high pressure building up in the crankcase, in particular when the internal combustion engine is running in the region of its zero load.
  • the invention is concerned with the problem of improving a generic device compared to the previously known prior art such that in particular a reduced space requirement can be achieved.
  • the invention is based on the general idea, in a device for venting a crankcase of an internal combustion engine with a ⁇ lnebelabscheider and a downstream of this pump to generate a negative pressure, the oil mist separator and the pump as an interconnected assembly form.
  • a particularly compact design is achieved, which is a great advantage in an increasingly scarce supply of space in an engine compartment.
  • the pump is downstream of the oil mist in a known manner. In principle, it is also conceivable that at Such an assembly can be found for maintenance cheaper installation location, so that a change of ⁇ lnebelabscheiders or maintenance of the pump is simpler and thus less expensive.
  • At least part of a stator of the pump is integrated in the oil mist separator.
  • the close teeth between the pump and the oil mist separator is clear, which is reflected in a very compact design and thus connected with a very small space requirement.
  • Simultaneous maintenance is possible by this design, since a part of the stator of the pump is preferably formed simultaneously as a baffle for the oil mist separator and, if this baffle is covered with a corresponding non-woven or the like, allows simplified access thereto.
  • the oil mist separator comprises an impactor which has flow nozzles and a baffle wall opposite thereto.
  • Such formed as an impactor oil mist separator have long been, for example EP 1 068 890 B1 known and ensure reliable oil separation over a long service life.
  • the oil mist separator upstream or downstream of an additional ⁇ lnebelvorabscheider or an additional ⁇ lnebelnachabscheider.
  • an upstream ⁇ lnebelvorabscheider is for example a cyclone in question, which an additional Cleaning the oil mist-containing blow-by gases causes.
  • Such a cyclone can also be used as Nachabscheider.
  • a fan blade of the pump is arranged coaxially to the axis of the oil mist separator and rotates this radially outward.
  • Such an arrangement of the fan blade of the pump ensures a particularly compact design, which can reduce the space requirement of the assembly formed by ⁇ lnebelabscheider and pump.
  • a part of the oil mist separator can be formed by parts of the stator of the pump, whereby the compactness of the assembly according to the invention can be additionally increased.
  • the oil mist separator and the pump have a common housing or are arranged in a common housing.
  • This measure also favors the compact design of the assembly formed from oil mist separator and pump and also eliminates the need for another housing, for example for the pump or the oil mist separator.
  • a common housing therefore reduces the variety of parts and helps to reduce the manufacturing costs of the assembly.
  • a device 1 according to the invention for the venting of a crankcase, not shown, of an internal combustion engine is shown.
  • the device 1 is arranged in a vent line, which leads from the crankcase to a suction, or suction of the engine, and has essentially an oil mist separator 2 and a downstream downstream pump 3 for generating a negative pressure.
  • the pump 3 is connected downstream of the oil mist separator 2, so that only cleaned blow-by gases with a fan 4 of the pump 3 come into contact.
  • the pump 3 is used to generate a negative pressure, which is to ensure that even in zero-load operation of the engine, a too high gas pressure in the crankcase is avoided and occurring in the crankcase blow-by gases are reliably sucked.
  • the oil mist separator 2 and the pump 3 formed as interconnected assembly. This allows a particularly compact design of the device 1 and reduced their space requirements, which is especially in the small space available in today's engine compartments of great advantage.
  • the oil mist separator 2 has nozzles 5, in particular flow or acceleration nozzles, which accelerate the gas stream flowing through the device 1 and feed it to a baffle wall 6 opposite the nozzles 5.
  • the baffle 6 is occupied for example with a fabric or a non-woven, which further improves the absorption effect.
  • the oil collected on the baffle wall flows according to the Fig. 1 and 2 in the direction of gravity on a bottom 7 of the ⁇ lnebelabscheiders 2 and from this to an oil drain 8, which is preferably connected to an oil reservoir, not shown, so that the separated oil can be recirculated to a lubrication circuit.
  • the oil mist separator 2 is designed as an impactor, wherein in addition a not shown ⁇ lnebelvorabscheider or ⁇ lnebelnachabscheider can be provided.
  • Such an oil mist pre-separator which is arranged upstream of the impactor or of the oil mist separator 2, can be designed, for example, as a cyclone.
  • the pump 3 is designed as an annular duct fan, which presses on its fan blades 9 cleaned blow-by gas in the direction of an output 10 and thereby generates a negative pressure in the oil mist separator 2 or in the upstream crankcase.
  • the designated by the reference numeral 3 pump according to the Fig. 1 and 2 stands for the space of the pump 3, so that in this example, a storage or control of the pump 3 can be accommodated.
  • FIG. 1 can be seen further, at least part of a stator 11 of the pump 3 is integrated into the oil mist separator 2, wherein the stator 11 according to the Fig. 1 the baffles 6 forms.
  • the oil mist separator 2 is designed as a switchable oil mist separator and a vacuum valve 12, in particular a spring-loaded vacuum valve 12, which causes a defined flow under a defined negative pressure and further nozzles 5 'releases.
  • the vacuum valve 12 is designed as a poppet valve. When the vacuum valve 12 is open, thus blow-by gas flows through both the nozzles 5 and the other nozzles 5 '. Both nozzles 5 and 5 'is common that they direct the accelerated blow-by gas flow to the baffle 6 and thereby cause an oil mist separation at this.
  • Fig. 1 the fan blade 9 of the pump 3 is arranged coaxially to the axis 13 of the oil mist separator 2 and circulates this radially outside.
  • the fan blade 9 of the pump 3 according to the Fig. 2 arranged offset in the axial direction to the oil mist separator 2, whereby the height of the in Fig. 2 shown variant of the device 1 increases slightly.
  • Both the oil mist separator 2 and the pump 3 are according to the Fig. 1 arranged in a common housing 14, so that in comparison to a separate design of the two components, a housing can be saved.
  • Fig. 1 the fan blade 9 of the pump 3 is arranged coaxially to the axis 13 of the oil mist separator 2 and circulates this radially outside.
  • the fan blade 9 of the pump 3 according to the Fig. 2 arranged offset in the axial direction to the oil mist separator 2, whereby the height of the in Fig. 2 shown variant of the device 1 increases slightly.
  • the pump 3 and the baffle 6 of the oil mist separator 2 are arranged in a first housing part 14 ', while the nozzles 5 of the oil mist separator 2 are arranged in a second housing part 14 "which can be connected to the first housing part 14' individual housing parts 14 'and 14''allow a disassembly of the device 1, which is particularly advantageous during maintenance.
  • the device 1 is characterized by a low overall height, for example 45 mm and a small width, for example 90 mm.
  • the fan 4 is offset with the radially outwardly arranged fan blades 9 in a rotational movement about the axis 13, whereby blow-by gases are pressed in the direction of the output 10 and are sucked in from an input 15 ago.
  • the oil-mist-containing blow-by gases enter the oil mist separator 2 via the inlet 15, they flow along the flow direction 16 as far as the flow direction 16 Nozzle 5 or to the nozzles 5, to which the blow-by gases are accelerated.
  • the baffle 6 is arranged, on which bounce the blow-by gases and thereby deliver at least a large part of their transported oil to the baffle 6.
  • the blow-by gases flow along the direction 16 to the fan blade 9 and from there to the output 10.
  • the collected on the baffle 6 oil runs in the direction of gravity and drips onto the bottom 7, which at its lowest point the oil drain. 8 having.
  • This oil drain 8 is preferably connected to the oil reservoir and leads the separated oil to the oil circuit again.
  • the inventive device 1, a particularly compact design can be achieved, which also saves an additional housing either for the oil mist separator 2 or for the pump 3 and beyond additional connecting lines between the oil mist separator 2 and the pump 3 can be obsolete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Separating Particles In Gases By Inertia (AREA)
EP07728890A 2006-05-29 2007-05-08 Einrichtung für die entlüftung eines kurbelgehäuses Active EP2021592B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006024816A DE102006024816A1 (de) 2006-05-29 2006-05-29 Einrichtung für die Entlüftung eines Kurbelgehäuses
PCT/EP2007/054437 WO2007137934A2 (de) 2006-05-29 2007-05-08 Einrichtung für die entlüftung eines kurbelgehäuses

Publications (2)

Publication Number Publication Date
EP2021592A2 EP2021592A2 (de) 2009-02-11
EP2021592B1 true EP2021592B1 (de) 2010-03-24

Family

ID=38442115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07728890A Active EP2021592B1 (de) 2006-05-29 2007-05-08 Einrichtung für die entlüftung eines kurbelgehäuses

Country Status (6)

Country Link
US (1) US8607767B2 (ja)
EP (1) EP2021592B1 (ja)
JP (1) JP4991850B2 (ja)
CN (1) CN101495720B (ja)
DE (2) DE102006024816A1 (ja)
WO (1) WO2007137934A2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012200015A1 (de) * 2012-01-02 2013-07-04 Mahle International Gmbh Kurbelgehäuseentlüftungsvorrichtung
DE102012021309A1 (de) * 2012-10-31 2014-04-30 Mann + Hummel Gmbh Kurbelgehäuseentlüftungsvorrichtung
DE102013215611A1 (de) 2013-08-07 2015-03-05 Mahle International Gmbh Ölnebelabscheider

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DE102012021309A1 (de) * 2012-10-31 2014-04-30 Mann + Hummel Gmbh Kurbelgehäuseentlüftungsvorrichtung
DE102012021309B4 (de) * 2012-10-31 2014-08-07 Mann + Hummel Gmbh Kurbelgehäuseentlüftungsvorrichtung
DE102013215611A1 (de) 2013-08-07 2015-03-05 Mahle International Gmbh Ölnebelabscheider

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JP4991850B2 (ja) 2012-08-01
CN101495720B (zh) 2011-02-02
WO2007137934A3 (de) 2009-02-26
EP2021592A2 (de) 2009-02-11
DE102006024816A1 (de) 2007-12-06
DE502007003230D1 (de) 2010-05-06
JP2009539013A (ja) 2009-11-12
WO2007137934A2 (de) 2007-12-06
CN101495720A (zh) 2009-07-29
US8607767B2 (en) 2013-12-17
US20100294218A1 (en) 2010-11-25

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