EP2700791A1 - Agencement séparateur d'huile et coiffe de tête de cylindre pour un moteur à combustion - Google Patents

Agencement séparateur d'huile et coiffe de tête de cylindre pour un moteur à combustion Download PDF

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Publication number
EP2700791A1
EP2700791A1 EP12181477.6A EP12181477A EP2700791A1 EP 2700791 A1 EP2700791 A1 EP 2700791A1 EP 12181477 A EP12181477 A EP 12181477A EP 2700791 A1 EP2700791 A1 EP 2700791A1
Authority
EP
European Patent Office
Prior art keywords
gas
oil separator
blow
arrangement according
separator arrangement
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.)
Withdrawn
Application number
EP12181477.6A
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German (de)
English (en)
Inventor
Manfred Brand
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.)
Dichtungstechnik G Bruss GmbH and Co KG
Original Assignee
Dichtungstechnik G Bruss GmbH and Co KG
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 Dichtungstechnik G Bruss GmbH and Co KG filed Critical Dichtungstechnik G Bruss GmbH and Co KG
Priority to EP12181477.6A priority Critical patent/EP2700791A1/fr
Publication of EP2700791A1 publication Critical patent/EP2700791A1/fr
Withdrawn legal-status Critical Current

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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
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • 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
    • F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen

Definitions

  • the invention relates to an oil separator assembly having the features of the preamble of claim 1 and a cylinder head cover having the features of the preamble of claim 15.
  • the goal is to separate as many particles and oil droplets from the blow-by gas as possible.
  • a major application of these oil separator arrangements is in the cylinder head covers of internal combustion engines.
  • the invention is therefore an object of the invention to provide a ⁇ labscheideran Aunt and a cylinder head cover, in which the oil separation is improved with the simplest possible means to be converted.
  • the baffle has a corrugated surface.
  • the blow-by gas is directed to a baffle-equipped baffle and deflected at this.
  • larger particles can be impacted into the corrugated surface. These first adhere to the enlarged surface and then flow off.
  • corrugated surface comprises any particular periodic structure of alternating or spaced-apart elevations and / or depressions. Preferably, it is elongated elevations and depressions, which are preferably arranged parallel to each other, in particular alternately arranged webs and / or grooves. For example, comb-like structures are also included in the cross section.
  • the flow direction of the blow-by gas is therefore directed to the corrugated baffle.
  • directed to the baffle wall all such orientations are to be understood, in which the predominant direction-forming component is directed onto the baffle wall, ie flow directions which flow at an angle greater than 45 ° or less than 135 ° to the baffle wall.
  • corrugated surface is the ease of implementation in existing systems. For example, if the design of a cylinder head cover is to be modified to include a baffle with a corrugated surface, this can be done by making comparatively small changes to the production tool.
  • the corrugated surface is formed by a plurality of grooves.
  • the particles are slowed down and then flow off together with the separated oil droplets.
  • the corrugations or the grooves are preferably arranged or aligned so that they extend in the direction of the extension direction of the cylinder head cover from the production tool.
  • a corrugation with a triangular profile can be produced uniformly flat by a corresponding triangular profile on the production tool.
  • the grooves are exactly in extension movement.
  • the basic geometry of proven cylinder head covers does not have to be laboriously changed, but the effectiveness of the oil separation can be appreciably increased by providing or modifying existing baffles with a corrugated surface.
  • the corrugated baffle is arranged in the flow path in front of a separation device.
  • a separation device for example, in front of a by the blow-by gas automatically controlled spring tongue (hereinafter also referred to as Federzonneabscheider), or in front of a separation device in which in a vortex chamber in the flow direction helically rotating gas vortex flow is generated (hereinafter also referred to as Wirbelhuntabscheider).
  • the oil separator preferably comprises a Federzept- and / or Wirbelhuntabscheider.
  • a corrugated baffle disposed in front of these separators serves for pre-separation and thus increases the effectiveness of the oil separator arrangement.
  • the gas outlet opening of the Wirbelhuntabscheiders is preferably disposed in the region of the outlet end of the vortex chamber, wherein in the vortex chamber due to the preferably tangential gas inlet, a rotating, helical gas vortex is induced, which extends from the gas inlet to the outlet end.
  • the vortex chamber is expediently substantially cylindrically shaped, this term meaning a cross-sectionally rounded, for example oval or round, shape and comprising a cross-section changing over the length of the vortex chamber.
  • the corrugated baffle in the flow path behind one or more deposition devices for example behind one of the above-mentioned Federzungen- and / or Wirbelhuntabborger arranged.
  • the blow-by gas strikes the corrugated surface after flowing through the separator and thereby separates further particles and / or oil droplets, whereby overall the effectiveness of the oil separator arrangement can be increased.
  • the Wirbelzigabscheider is preferably uncontrolled, that is free of elements for the controlled change of the flow, in particular free of corresponding switching elements or valves.
  • the vortex chamber has an open gas inlet and an open gas outlet opening.
  • a corrugated baffle wall is provided in combination in the flow path in front of and behind the separation device. In this way, the effectiveness of the separator can be further increased. Also more than two baffles are possible.
  • the oil separator assembly according to the invention is not limited to an arrangement in combination with a Federzitch- and / or Wirbelhuntabscheider, but can for example be used as a pre-separator or low-price oil separator without fine separation.
  • FIG. 1 shows a section of a cylinder head cover 1 of an internal combustion engine having an inventive oil separator assembly.
  • the blow-by gas 4 of the internal combustion engine is deflected to a total of, for example, two fluted baffles 2.
  • the corrugation is formed by a plurality of grooves 3.
  • the flow of the blow-by gas 4 is marked with arrows in the illustration.
  • the deflection at the first impinged baffle 2 takes place about an axis transverse to the flow direction of the blow-by gas at an angle of preferably greater than 90 °, more preferably greater than 160 °.
  • At this first corrugated baffle 2 is a pre-separation of particles and oil droplets from the blow-by gas 4. Due to the large deflection by more than 160 ° already a significant proportion of particles and oil droplets on the corrugated baffle 2 is deposited.
  • the separation device can be, for example, a spring tongue (so-called spring tongue separator) controlled automatically by the blow-by gas 4, or a so-called vortex chamber separator, in which a gas vortex flow which helically rotates in the direction of flow is generated in a vortex chamber.
  • the separator may also be a cyclone separator with a dip tube.
  • the separation devices typically have a flow channel 5.
  • the blow-by gas 4 is deflected a second time on a baffle 2 provided with a corrugation.
  • the flow direction of the blow-by gas 4 is deflected at this second baffle 2 by an angle greater than 45 °, more preferably greater than 80 °.
  • the oil separator assembly in this preferred embodiment thus comprises two baffles 2, both preferably having a corrugated surface.
  • FIG. 2 a section of an oil separator according to the invention is shown. On a provided with grooves 3 baffle 2 flows blow-by gas 4, which has previously flowed through a separator.
  • Two different separation devices are shown by way of example. Three juxtaposed Federzonneabscheider 9 and a Wirbelhuntabscheider. 8
  • the helically rotating gas vortex flow of the blow-by gas 4 is indicated.
  • the blow-by gas 4 is introduced through a tangentially directed inlet 10 into the Wirbelhuntabscheider 8 and rotates on the inside of the flow channel 5 helically in the longitudinal direction.
  • the advantageous for the oil separator arrangement embodiment of Wirbelhuntabscheiders 8 is in the document DE 10 2007 046 235 A1 executed, the contents of which is included in the present application in this respect.
  • FIG. 5 is a section through a Wirbelhuntabscheider shown.
  • a vortex chamber 13 is formed by a substantially tubular circumferential or peripheral wall 14.
  • a gas inlet opening 12 is provided in the jacket wall 14.
  • a tubular gas inlet 18 is provided, which is arranged tangentially to the vortex chamber 13.
  • the tubular gas inlet 18 produces a tangentially directed flow of the blow-by gas 4 entering the chamber 13 through the gas inlet opening 12.
  • the gas flow entering through the gas inlet opening 12 is guided along the chamber wall 14. Due to the flow component in the longitudinal direction 21 arises in the chamber 13 a helically rotating about the longitudinal axis of the gas vortex 20, without additional guide devices such as baffles or the like are required.
  • Helical means that the gas vortex forms at least one complete revolution, preferably at least two complete revolutions, in a medium load range of the engine.
  • the rotating gas vortex 20 extends in total in a longitudinal direction 21 of the tubular chamber 13.
  • the longitudinal direction 21 extends along the central axis of the chamber 13 and may therefore be composed in sections, such as from Fig. 5 is apparent.
  • the centrifugal forces acting on the oil particles in the gas vortex 20 cause a separation of the oil particles by contact with the peripheral wall 14 and coalescence of oil particles accumulating in the outer region of the chamber 13 to form oil droplets.
  • the separated oil drains along the peripheral wall 14 of the chamber 13 and is returned by means of a return 24 in the engine oil circuit.
  • the bottom of the chamber 13 in the operating position preferably has a steady gradient up to the oil drain line 24.
  • the helical gas vortex 20 After passing through the chamber 13, the helical gas vortex 20 exits at the outlet end 22 of the chamber 13, i. it enters a non-rotating flow and exits the chamber 13 through the gas outlet port 25 located at the outlet end 22 of the chamber 13.
  • the cleaned blow-by gas 23 is then passed through a clean room, for example to the pressure control valve.
  • an injection mold used in the manufacture of the oil separator 11 can engage through the gas outlet opening 25 in the chamber 13.
  • the cross-section of the chamber 13 between the near-inlet end 19 and the outlet end 22 has no taper, and that the surface of the gas outlet opening 25 is preferably greater than or equal to the maximum cross-sectional area of the chamber 13.
  • the open construction of the vortex chamber 13 allows the separated oil 27 to flow out of the vortex chamber 13 through the gas outlet opening 25 having a large cross section. As a result, an oil drainage with a small cross-section, which shows an unfavorable freezing behavior, can be avoided.
  • the oil drain line 24 preferably discharges into the clean room and not into the vortex chamber 13.
  • the vortex chamber 13 has two preferably parallel arranged, tangentially contacting partial chambers with a shared gas inlet for the formation of two counter-rotating, parallel gas vortexes; it is thus a double chamber.
  • the gas inlet preferably takes place tangentially in the region of the tangential contact of the two sub-chambers and is preferably directed towards the middle of a web which serves as a flow divider.
  • the sub-chambers are preferably (mirror) symmetrical to the gas inlet.
  • the peripheral wall of the chamber is therefore preferably omega-shaped or ⁇ -shaped. Compared to a vortex separator with only one gas vortex, the flow rate of the separator can be substantially doubled with a relatively small amount of space.
  • the configuration of the Wirbelhuntabscheiders is not limited to a certain number of gas vortices. Also included are embodiments with a gas vortex, as in the application DE 10 2007 046 235 A1 described. Embodiments with more than two parallel gas vortices are also conceivable.
  • three Federzonneabscheider 9 can be arranged in addition to the Wirbelhuntabscheider 8. If the spring tongue of the Federzonneabscheiders 9 automatically releases an opening gap for the blow-by gas 4 due to the increased gas pressure against the spring bias, over a large volume flow range approximately linear or at least non-exponentially increasing transmission characteristic be achieved. In the spring tongue separator 9 preferably no helically rotating gas vortex is generated, which could cause a disproportionate or even exponential increase in the pressure loss at high flow rates.
  • the advantageous for the oil separator arrangement embodiment of the Federzonneabscheiders 9 is in the publications DE 103 20 215 B4 respectively. DE 10 2007 058 059 A1 executed, the content of which is included in the present application in this respect.
  • FIG. 6 shows a preferred embodiment of a Federzonneabscheiders 42.
  • a spring tongue 41 is assigned to the Federzonneabscheider 42 and disposed substantially in the deposition chamber 43, and opens inwards.
  • the spring tongue 41 is cantilevered at one end in a clamping device 45.
  • the other end of the spring tongue 41 covers in the rest position, the gas inlet opening 46 of the oil separator 42, which may be circular, for example, from.
  • the free end of the spring tongue 41 is acted upon by the oil-loaded blow-by gas. Due to the pressurization, the spring tongue 41 releases a gap 47, through which the blow-by gas flows at high speed into the downstream separation chamber 43.
  • a baffle 48 is provided, which expediently has a predominantly vertical component with respect to the spring tongue 41 in the rest position and is preferably oriented approximately perpendicular to the spring tongue 41 in the rest position. Approximately perpendicular here means at an angle in the range of 70 ° to 110 °, preferably in the range of 80 ° to 100 °.
  • the gas flow entering through the gap 47 thus runs approximately perpendicular to the baffle 48 and is deflected along the baffle 48. Due to the inertia of the Oil and dirt particles in the blow-by gas are deposited on the baffle 48.
  • the gas flow is discharged through a downstream outlet chamber 44 such that a deflection of the gas flow in the opposite direction to the flow direction through the gap 47 into the separation chamber 43 takes place on the impact wall.
  • the deflection of the gas flow is here preferably more than 120 ° and more preferably more than 150 ° to about 180 °, as shown Fig. 6 is apparent.
  • the deposited on the baffle 48 oil drains from the bottom 49 of the separation chamber 43 and the downstream outlet chamber 44 and is returned by means of the return in the engine oil circuit.
  • the bottom of the chambers 43, 44 in the operating position preferably has a steady gradient up to the oil drainage.
  • both the Wirbelhuntabscheider 8 and the Federzacheabscheider 9 a flow channel 5.
  • the flow channel 5 may be both closed and open in the longitudinal direction.
  • the flow channel 5 of the Wirbelzigabscheiders 8 is closed in the longitudinal direction and the flow channels 5 of the Federzeptabscheider 9 in the longitudinal direction open, wherein the lower-side opening of the flow channels 5 in the illustration of FIG. 2 is not visible.
  • the blow-by gas 4 exits from the outlet opening of the flow channel 5.
  • a corrugated baffle 2 is arranged.
  • the distance D formed between the exit opening of the flow channel 5 and the corrugated surface is generally preferably less than 8 mm, more preferably less than 6 mm.
  • the distance D is preferably less than 2 mm, more preferably less than 1 mm. This comparatively small gap causes an increased separation of particles and oil droplets on the baffle 2.
  • the blow-by gas 4 ultimately exits the oil separator arrangement via a Gausaustritt 7.
  • the gas outlet 7 can also lead to other ventilation components, which are necessary for example for pressure or flow control.
  • a gas outlet 7 equipped with a pressure regulating valve is preferred for use in a diesel engine.
  • a PCV valve Positive Crankcase Ventilation
  • a pressure control valve with or without combination with one check valve or multiple check valves can be provided.
  • a baffle 2 preferably ⁇ labtropfrippen can be arranged, collected over which the separated oil and then returned to the oil circuit.
  • the return of the separated oil takes place for example via the oil return 6, which preferably has a check valve.
  • FIGS. 3 and 4 the corrugated surface forming grooves 3 are shown in detail.
  • FIG. 3 shows the grooves 3 in isometric view, the FIG. 4 in a sectional view.
  • FIG. 4 shows the grooves 3 in isometric view, the FIG. 4 in a sectional view.
  • the grooves 3 have a depth t and are arranged next to one another at a distance d1.
  • the width of the grooves 3 is referred to as d2.
  • the groove depth t is preferably at least 0.5 mm, more preferably at least 0.75 mm, for example about 1 mm, with larger depths are conceivable.
  • the grooves 3 are preferably arranged equidistantly next to each other
  • the groove spacing d1 and the groove width d2 are each preferably less than two, preferably less than one millimeter.
  • the grooves 3 are preferably triangular in cross section.
  • the ratio of groove pitch d1 to groove width d2 is preferably in a range between 0.5 and 1.5, preferably in a range between 0.75 and 1.25.
  • the ratio of groove spacing d2 to groove depth t is preferably in a range between 0.5 and 1.5, preferably in a range between 0.75 and 1.25.
  • the ratio of groove width d1 to groove depth t is preferably in a range between 0.5 and 1.5, preferably in a range between 0.75 and 1.25.
  • the corrugation of the baffle 2 is not limited to triangular grooves 3.
  • the shaping of the recesses 7 or elevations 3 in cross section is suitably selectable.
  • comb-like structures are also included in cross-section, as in FIG FIG. 7 shown embodiment.
  • the corrugation is formed by parallel and alternately arranged webs 3 and grooves 7 formed therebetween.
  • the webs 3 are rectangular, for example, in cross section.
  • the width d1 of the webs 3 is preferably in the range between 1 mm and 3 mm.
  • the distance d2 of the webs 3, or the width of the grooves 7, is preferably in the range between 1 mm and 2 mm.
  • the height of the webs 3 or the depth t of the grooves 7 is preferably larger, more preferably at least twice as large as the width d1 of the webs 3, and is preferably in the range between 2 mm and 10 mm.

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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)
EP12181477.6A 2012-08-23 2012-08-23 Agencement séparateur d'huile et coiffe de tête de cylindre pour un moteur à combustion Withdrawn EP2700791A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12181477.6A EP2700791A1 (fr) 2012-08-23 2012-08-23 Agencement séparateur d'huile et coiffe de tête de cylindre pour un moteur à combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12181477.6A EP2700791A1 (fr) 2012-08-23 2012-08-23 Agencement séparateur d'huile et coiffe de tête de cylindre pour un moteur à combustion

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EP2700791A1 true EP2700791A1 (fr) 2014-02-26

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014006149U1 (de) * 2014-07-29 2015-07-31 Reinz-Dichtungs-Gmbh Vorrichtung zum Abscheiden von Öltröpfchen und/oderÖlnebel
CN106855001A (zh) * 2015-12-09 2017-06-16 北汽福田汽车股份有限公司 油气分离器、发动机及车辆
CN107476845A (zh) * 2016-07-19 2017-12-15 宝沃汽车（中国）有限公司 一种发动机挡油板及具有其的发动机总成和车辆
CN109854339A (zh) * 2017-11-30 2019-06-07 宝沃汽车（中国）有限公司 油气分离器、发动机和车辆

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000045750A (ja) * 1998-07-24 2000-02-15 Uchiyama Mfg Corp ロッカカバーのオイルセパレータ
JP2003001030A (ja) * 2001-06-19 2003-01-07 Uchihama Kasei Kk オイルミストセパレータ
DE202004004803U1 (de) * 2003-05-05 2004-07-08 Dichtungstechnik G. Bruss Gmbh & Co. Kg Ölabscheidevorrichtung für eine Brennkraftmaschine
EP1524414A2 (fr) * 2003-10-15 2005-04-20 Mahle Tennex Corporation Séparateur d'huile intégré dans le couvre culasse
DE102007046235A1 (de) 2006-12-22 2008-06-26 Dichtungstechnik G. Bruss Gmbh & Co. Kg Zylinderkopfhaube für einen Verbrennungsmotor
US20080179230A1 (en) * 2007-01-26 2008-07-31 Manfred Brand Oil Separator Arrangement and Cylinder Head Cover for an Internal Combustion Engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000045750A (ja) * 1998-07-24 2000-02-15 Uchiyama Mfg Corp ロッカカバーのオイルセパレータ
JP2003001030A (ja) * 2001-06-19 2003-01-07 Uchihama Kasei Kk オイルミストセパレータ
DE202004004803U1 (de) * 2003-05-05 2004-07-08 Dichtungstechnik G. Bruss Gmbh & Co. Kg Ölabscheidevorrichtung für eine Brennkraftmaschine
DE10320215B4 (de) 2003-05-05 2005-04-21 Dichtungstechnik G. Bruss Gmbh & Co. Kg Ölabscheidevorrichtung für eine Brennkraftmaschine
EP1524414A2 (fr) * 2003-10-15 2005-04-20 Mahle Tennex Corporation Séparateur d'huile intégré dans le couvre culasse
DE102007046235A1 (de) 2006-12-22 2008-06-26 Dichtungstechnik G. Bruss Gmbh & Co. Kg Zylinderkopfhaube für einen Verbrennungsmotor
US20080179230A1 (en) * 2007-01-26 2008-07-31 Manfred Brand Oil Separator Arrangement and Cylinder Head Cover for an Internal Combustion Engine
DE102007058059A1 (de) 2007-01-26 2008-08-07 Dichtungstechnik G. Bruss Gmbh & Co. Kg Ölabscheideranordnung für einen Verbrennungsmotor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014006149U1 (de) * 2014-07-29 2015-07-31 Reinz-Dichtungs-Gmbh Vorrichtung zum Abscheiden von Öltröpfchen und/oderÖlnebel
US10364714B2 (en) 2014-07-29 2019-07-30 Reinz-Dichtungs-Gmbh Device for the separation of oil droplets and/or oil mist
DE112015003481B4 (de) 2014-07-29 2021-07-29 Reinz-Dichtungs-Gmbh Vorrichtung zum Abscheiden von Öltröpfchen und/oder Ölnebel
CN106855001A (zh) * 2015-12-09 2017-06-16 北汽福田汽车股份有限公司 油气分离器、发动机及车辆
CN106855001B (zh) * 2015-12-09 2019-02-26 北汽福田汽车股份有限公司 油气分离器、发动机及车辆
CN107476845A (zh) * 2016-07-19 2017-12-15 宝沃汽车（中国）有限公司 一种发动机挡油板及具有其的发动机总成和车辆
CN107476845B (zh) * 2016-07-19 2019-10-22 北汽福田汽车股份有限公司 一种发动机挡油板及具有其的发动机总成和车辆
CN109854339A (zh) * 2017-11-30 2019-06-07 宝沃汽车（中国）有限公司 油气分离器、发动机和车辆
CN109854339B (zh) * 2017-11-30 2020-08-18 宝沃汽车（中国）有限公司 油气分离器、发动机和车辆

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