EP1961928A2 - Préséparateur d'huile pour gaz de carter de vilebrequin - Google Patents

Préséparateur d'huile pour gaz de carter de vilebrequin Download PDF

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Publication number
EP1961928A2
EP1961928A2 EP08001485A EP08001485A EP1961928A2 EP 1961928 A2 EP1961928 A2 EP 1961928A2 EP 08001485 A EP08001485 A EP 08001485A EP 08001485 A EP08001485 A EP 08001485A EP 1961928 A2 EP1961928 A2 EP 1961928A2
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head cover
oil
shell body
space
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
EP08001485A
Other languages
German (de)
English (en)
Other versions
EP1961928B1 (fr
EP1961928A3 (fr
Inventor
Frank Dieterle
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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
Priority claimed from DE200720003094 external-priority patent/DE202007003094U1/de
Priority claimed from DE102007010308A external-priority patent/DE102007010308A1/de
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1961928A2 publication Critical patent/EP1961928A2/fr
Publication of EP1961928A3 publication Critical patent/EP1961928A3/fr
Application granted granted Critical
Publication of EP1961928B1 publication Critical patent/EP1961928B1/fr
Ceased 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
    • F01M13/04—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

Definitions

  • the present invention relates to an oil pre-separator for crankcase gas of an internal combustion engine, in particular in a motor vehicle.
  • an oil separator for crankcase gases of an internal combustion engine is known, which is arranged on an inner side of a cylinder head cover.
  • the known oil separator has a housing shell, which is attached to the inside of the cylinder head cover and which receives the individual components of the oil separator.
  • the known oil separator comprises an oil pre-separator, a cyclone separator and a fine oil separator and a valve device.
  • Another oil separator is known, which is attached to the inside of a cylinder head cover.
  • This oil separator also has a housing shell for receiving the individual components of the oil separator, which have an inlet region with an inlet opening for crankcase gas and two spaced-apart oil returns, which has been deposited in an inlet oil separator or in an outlet oil separator from the crankcase gas.
  • the two returns are arranged in a central longitudinal region of a covered with the cylinder head cover cylinder head space, which is located between two each associated with a camshaft outer longitudinal regions.
  • the inlet opening is arranged above one of the camshafts, that is to say in one of the outer longitudinal regions.
  • Object of the present invention is to realize an improvement for a ⁇ lvorabscheider of the type mentioned, such as an improved separation efficiency.
  • the present invention proposes to form a pre-separation space on the inside of a cylinder head cover with the aid of a shell body.
  • this shell body has at least one inlet section with an inlet opening, which is arranged in the assembled state in a central longitudinal region of the cylinder head space. Due to this design, the respective inlet opening is located between the two outer longitudinal regions assigned to the camshafts.
  • crankcase gas can be sucked out of a fluidically calmed area of the cylinder head space, which leads to an improvement of the separation effect in the oil preseparator.
  • the respective inlet section simultaneously forms a return for oil separated in the pre-separation chamber. This has the consequence that the separated oil can drain through the inlet opening in the cylinder head space.
  • the oil separator or its shell body has a particularly simple shape, which makes the production of the oil pre-separator comparatively inexpensive.
  • the invention thus provides an oil pre-separator, which is virtually integrated in the assembled state in the cylinder head cover.
  • the present invention also relates to a combination of a cylinder head cover with an oil pre-separator.
  • the respective inlet portion may be configured so that it protrudes in the mounted state with its inlet opening via a flange of the cylinder head cover protruding into the cylinder head space.
  • the inlet opening is located comparatively deep or centrally within the cylinder head space, which favors the intake of crankcase gas from flow-dynamic favorable or calmed areas of the cylinder head space.
  • the respective inlet opening can thus be below the Camshafts are, for example, approximately at the level of an intermediate deck, which separates a camshaft space containing the camshafts in the cylinder head space from a spring of charge exchange valves containing valve spring space, or below the intermediate deck in the valve spring chamber.
  • an oil separation device comprises a plurality of different separation devices, such as an oil pre-separator and a plurality of main oil or fine oil separators configured, for example, as a cyclone, a scroll oil separator or the like.
  • this forms the only inside of the cylinder head cover arranged separating device such, having a plurality of separation devices having ⁇ labscheidevorraum.
  • the oil pre-separator according to the invention can thus simply be connected upstream of a conventional oil separation device in order to improve its effectiveness. At the same time, such an oil pre-separator can serve as an oil return for downstream oil separators.
  • a Vorabscheideraum which is formed with the aid of the shell body inside of the cylinder head cover, at least one outlet opening for crankcase gas, which is formed in the cylinder head cover.
  • a conventional ⁇ labscheidevorraum be connected to the cylinder head cover, whereby the ⁇ lvorabscheider invention is automatically preceded.
  • an oil pre-separator 1 comprises a shell body 2 which, for the purpose of forming the oil pre-separator 1 on an inner side 3 of a cylinder head cover 4, has a housing body Fig. 3 indicated internal combustion engine 5 is arranged.
  • the ⁇ lvorabscheider 1 is used in the operation of the internal combustion engine 5, which is preferably arranged in a motor vehicle, to excrete oil from crankcase gas.
  • This crankcase gas or blowby gas is thereby using a crankcase ventilation device, not shown here, from a crankcase of the internal combustion engine 5 or from a in Fig. 3 only partially shown cylinder head 6 of the internal combustion engine 5 sucked.
  • Such a venting device is usually equipped with a ⁇ labscheidevorraum also not shown here, which makes it possible to excrete in the crankcase gas entrained oil and return the crankcase.
  • ⁇ labscheidevoriques may have a plurality of separation devices.
  • One of these separation devices can be formed by the oil pre-separator 1 shown here.
  • the oil pre-separator 1 forms the only inside of the cylinder head cover 4 arranged separating such a ⁇ labscheidevorraum.
  • the oil pre-separator 1 is connected upstream of the other separation devices.
  • the shell body 2 has at least one inlet section 9, via the crankcase gas from one of the cylinder head cover 4 covered, in Fig. 3 recognizable cylinder head space 10 can enter the pre-separation chamber 8.
  • the shell body 2 has three such inlet sections 9.
  • Each inlet section 9 has an inlet opening 11, through which the crankcase gas passes from the cylinder head space 10 via the respective inlet section 9 into the pre-separation chamber 8.
  • the respective inlet section 9 has a flow cross-section which increases from the respective inlet opening 11 to the pre-separation chamber 8.
  • the entire inlet section 9 has a relatively large cross-sectional area, resulting in relatively low flow velocities through which only comparatively little oil or oil mist can be entrained with the crankcase gas flow.
  • the comparatively large cross section of the respective inlet section 9 causes oil from a film of oil forming on the inner surface of the respective inlet section 9, which can be caused by returning oil, not to be torn by the crankcase gas flow.
  • the flow cross section tapers to the respective inlet opening 11.
  • the cylinder head cover 4 has complementary clip contours 13 which are used for clipping the shell body 2 with the clip elements 12 interact.
  • the inlet sections 9 are designed in the shell body 2 so that they simultaneously form a return for oil, which has been separated from the oil preseparator 1 and optionally from other downstream separators. This means that the separated oil can flow off along the respective inlet section 9 in the direction of the cylinder head space 10 and ultimately drip off into the cylinder head space 10 through the respective inlet opening 11.
  • the ⁇ lvorabscheider 1 can thus be formed with only a single component, namely with the shell body 2 in that the shell body 2 is installed in the cylinder head cover 4.
  • the shell body 2 is made of one piece, so that in particular the inlet portions 9 and the clip elements 12 are integrally formed on the shell body 2.
  • the respective inlet section 9 is designed such that the associated inlet opening 11 in the mounted state according to Fig. 3 in the cylinder head space 10 in a central longitudinal region 14 which is located between two outer longitudinal regions 15.
  • Each of these longitudinal regions 15 is associated with a camshaft 16 indicated only symbolically here.
  • one camshaft 16 controls intake valves while the other camshaft 16 controls exhaust valves.
  • the axes of rotation of the camshafts 16 define the longitudinal direction of the cylinder head cover 4 and the shell body 2.
  • the inlet portions 9 may preferably be configured so that the respective inlet portion 9 protrudes in the assembled state with the associated inlet opening 11 via a flange 17 of the cylinder head cover 4 and projects into the cylinder head space 10.
  • the camshafts 16 are arranged in the cylinder head space 10 in a region which can also be referred to as a camshaft space 20.
  • This camshaft space 20 may be separated within the cylinder head space 10 by an intermediate deck 21 of a valve spring chamber 22, in which usually not shown return springs of the charge exchange valves, also not shown are arranged.
  • the storage is usually not shown bucket tappets of the charge exchange valves.
  • the oil pre-separator 1 thereby sucks in crankcase gas having a relatively low oil content.
  • the inlet section 9 protrudes so far into the cylinder head space 10 that its inlet opening 11 is approximately at the level of the intermediate deck 21 or even extends through a plane in which the intermediate deck 21 extends, and thereby into the Valve spring chamber 22 hineinerstreckt.
  • the respective inlet opening 11 of the cylinder head cover 4 is further away than the camshaft 16 in this construction.
  • the inlet portions 9 may expediently be configured or arranged on the shell body 2 that they extend within the central longitudinal region 14 each between two ignition devices.
  • the abovementioned ignition devices are not illustrated, however, 4 shafts or domes 18 are formed on the cylinder head cover, by means of which the abovementioned ignition devices can be attached to the internal combustion engine 5.
  • the proposed embodiment of the respective inlet section 9, such that the associated inlet opening 11 is arranged in the central longitudinal section 14, protrudes in particular over the Zylinderkopfhaubenflansch 17 protruding into the cylinder head space 10, preferably positioned below the camshaft 16 is, allows the intake of crankcase gas from a fluidically calmed area, for example in the spring chamber or sub-decks.
  • the suction of crankcase gas from such a calmed flow area leads to an improvement in the efficiency of the oil pre-separator 1.
  • the preseparation space 8 has at least one outlet opening 19 for crankcase gas.
  • This outlet opening 19 is according to Fig. 2 preferably formed in the cylinder head cover 4.
  • the above-mentioned crankcase ventilation device or its ⁇ labscheidevoriques be connected via the outlet opening 19 to the ⁇ lvorabscheider 1.
  • the shell body 2 itself has no outlet for crankcase gas. This means that the crankcase gas can escape from the pre-separation chamber 8 only through the outlet opening 19 of the cylinder head cover 4.
  • the shell body 2 may be configured as an injection molded part or as a diecast part.
  • the shell body 2 may be made of plastic or of metal or of light metal.
  • each of these cylinder head covers 4 can be equipped with such an oil pre-separator 1.
  • the shell body 2 of the two ⁇ lvorabscheider 1 are designed as equal parts, so that only one type of shell bodies 2 must be made, which is usable in both cylinder banks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP08001485.5A 2007-02-23 2008-01-26 Préséparateur d'huile pour gaz de carter de vilebrequin Ceased EP1961928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200720003094 DE202007003094U1 (de) 2007-02-23 2007-02-23 Ölvorabscheider für Kurbelgehäusegas
DE102007010308A DE102007010308A1 (de) 2007-02-23 2007-02-23 Ölvorabscheider für Kurbelgehäusegas

Publications (3)

Publication Number Publication Date
EP1961928A2 true EP1961928A2 (fr) 2008-08-27
EP1961928A3 EP1961928A3 (fr) 2010-11-10
EP1961928B1 EP1961928B1 (fr) 2018-07-25

Family

ID=39539579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08001485.5A Ceased EP1961928B1 (fr) 2007-02-23 2008-01-26 Préséparateur d'huile pour gaz de carter de vilebrequin

Country Status (1)

Country Link
EP (1) EP1961928B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114251156A (zh) * 2020-09-21 2022-03-29 深圳臻宇新能源动力科技有限公司 油气分离器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0222612U (fr) 1988-07-30 1990-02-15
DE10127819A1 (de) 2001-06-07 2003-01-02 Bosch Gmbh Robert Ölabscheidevorrichtung für Kurbelgehäusegase einer Verbrennungskraftmaschine
US20050092267A1 (en) 2003-10-15 2005-05-05 Mahle Tennex Corporation Oil separator combined with cylinder head cover

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2879952B2 (ja) * 1990-07-13 1999-04-05 ヤマハ発動機株式会社 Ｄｏｈｃエンジンのブローバイガス還元装置
JPH056116U (ja) * 1991-07-01 1993-01-29 マツダ株式会社 エンジンのシリンダヘツド構造
WO2003025354A1 (fr) * 2001-09-18 2003-03-27 Yanmar Co.,Ltd. Aerateur de moteur
DE102004004753A1 (de) * 2004-01-30 2005-08-18 Mann + Hummel Gmbh Zylinderkopfhaube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0222612U (fr) 1988-07-30 1990-02-15
DE10127819A1 (de) 2001-06-07 2003-01-02 Bosch Gmbh Robert Ölabscheidevorrichtung für Kurbelgehäusegase einer Verbrennungskraftmaschine
US20050092267A1 (en) 2003-10-15 2005-05-05 Mahle Tennex Corporation Oil separator combined with cylinder head cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114251156A (zh) * 2020-09-21 2022-03-29 深圳臻宇新能源动力科技有限公司 油气分离器

Also Published As

Publication number Publication date
EP1961928B1 (fr) 2018-07-25
EP1961928A3 (fr) 2010-11-10

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