EP1182343A2 - Zylinderkopfdeckel für eine Brennmaschine - Google Patents

Zylinderkopfdeckel für eine Brennmaschine Download PDF

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Publication number
EP1182343A2
EP1182343A2 EP01120268A EP01120268A EP1182343A2 EP 1182343 A2 EP1182343 A2 EP 1182343A2 EP 01120268 A EP01120268 A EP 01120268A EP 01120268 A EP01120268 A EP 01120268A EP 1182343 A2 EP1182343 A2 EP 1182343A2
Authority
EP
European Patent Office
Prior art keywords
separation chamber
head cover
cylinder head
air cleaner
blowby gas
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
EP01120268A
Other languages
English (en)
French (fr)
Other versions
EP1182343A3 (de
EP1182343B1 (de
Inventor
Daimon Okada
Eiichi Komatsu
Koichi Kishimoto
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
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 JP2000255679A external-priority patent/JP3853582B2/ja
Priority claimed from JP2000289343A external-priority patent/JP2002097920A/ja
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Publication of EP1182343A2 publication Critical patent/EP1182343A2/de
Publication of EP1182343A3 publication Critical patent/EP1182343A3/de
Application granted granted Critical
Publication of EP1182343B1 publication Critical patent/EP1182343B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • F02M35/044—Special arrangements of cleaners in or with respect to the air intake system, e.g. in the intake plenum, in ducts or with respect to carburettors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the present invention relates to the arrangement of a cylinder head cover fixed to the cylinder head of an internal combustion engine.
  • the head cover for covering the top of the cylinder head is prepared as a separate component from the air cleaner .
  • this arrangement leads to an increase in number of parts to be fabricated.
  • the separate arrangement tends to make the entire engine system rather bulky and heavy.
  • JP-A-9(1997)-112358 teaches a one-piece structure of a cylinder head cover and an air cleaner.
  • the air cleaner formed integral with the head cover, is disposed on the top of the head cover.
  • the reduction of the height of the head cover can be achieved simply by reducing the internal volumes of the separation chamber and the air cleaner.
  • downsizing of the chamber and the cleaner may cause a lowering of gas/liquid separation efficiency in the separation chamber or deterioration of the noise-absorbing function for intake gases in the air cleaner.
  • blowby gas extraction tube made of e.g. rubber for conducting blowby gases from the cylinder head cover to the throttle body, as disclosed in JP-A-1(1989)-290907.
  • the extraction tube is connected, at one end, to the blowby gas extraction port of the head cover and, at the other end, to the blowby gas inlet port of the throttle body.
  • blowby gas extraction tube needs to be prepared in addition to other necessary components. Also, due to the increased number of parts to be used, the fabrication procedure of the engine system may become time-consuming. What is worse, the conventional blowby gas extraction tube is often clogged by the freezing of liquid which has been separated from blowby gases.
  • the present invention has been proposed under the circumstances described above. It is, therefore, an object of the present invention to provide a novel arrangement of a cylinder head cover which does not suffer the above problems.
  • a cylinder head cover for covering the cylinder head of an internal combustion engine.
  • the head cover includes a housing, an air cleaner integral with the housing, and a gas/liquid separation chamber for blowby gases.
  • the separation chamber is also integral with the housing.
  • the head cover is characterized in that the air cleaner and the separation chamber are horizontally disposed with each other, and that the separation chamber projects upward or in the height direction of the air cleaner.
  • the head cover of the second aspect includes a housing, an air cleaner integral with the housing, and a gas/liquid separation chamber for blowby gases.
  • the separation chamber is also integral with the housing.
  • the head cover of the second aspect is characterized in that the air cleaner and the separation chamber are horizontally disposed with each other, that the separation chamber projects in the height direction of the air cleaner, that the air cleaner is connected to a throttle body above the separation chamber, and that the separation chamber is provided with a blowby gas extraction port which is directly connected to a blowby gas inlet port of the throttle body.
  • the air cleaner may include a dust case, a clean case and a filtering element.
  • the clean case may be detachably attached to the dust case from above.
  • the filtering element may be disposed between the dust case and the clean case.
  • the dust case may accommodate ignition coils for cylinders of the internal combustion engine.
  • the ignition coils are protected by the dust case of the air cleaner, whereby no additional protecting means needs to be provided for the ignition coils. Further, advantageously the ignition coils are cooled down by the gas flow within the air cleaner.
  • the separation chamber may be elongated along the row of the cylinders of the engine, thereby increasing the inner volume of the chamber.
  • the cylinder head cover of the second aspect may further include a first contact surface in which the blowby gas extraction port has an opening.
  • the first contact surface may be pressed against a second contact surface of the throttle body in which the blowby gas inlet port has an opening.
  • the first contact surface may be held horizontally or substantially horizontally with the blowby gas extraction port directed upward.
  • the second contact surface may be held horizontally or substantially horizontally with the blowby gas inlet port directed downward.
  • Figs. 1 and 2 illustrate a cylinder head cover according to a first embodiment of the present invention.
  • numeral 1 refers to a cylinder head of an internal combustion engine.
  • the engine includes three cylinders A1, A2 and A3 arranged in a row.
  • a cam mechanism responsible for actuating e.g. inlet or exhaust valves is accommodated in a valve system chamber 2 located at the top of the cylinder head 1.
  • the cylinder head cover (generally indicated by numeral 3) is detachably fixed to the cylinder head 1 to close the valve system chamber 2.
  • the cylinder head cover 3 includes a suitably profiled housing in which an air filtering element 4c and a gas/liquid separation chamber 5 for blowby gases are provided.
  • the profiled housing includes a lower casing (dust case) 4a and an upper casing (clean case) 4b which is detachably attached to the lower casing 4a from above.
  • the filtering element 4c is disposed between the lower and the upper casings 4a, 4b, thereby partitioning the space defined by the two casings 4a, 4b.
  • the lower and the upper casings 4a, 4b and the above-mentioned filtering element 4c constitute an air cleaner 4.
  • the lower casing 4a of the air cleaner 4 is disposed at substantially the same level with and adjacent to the separation chamber 5.
  • the separation chamber 5 tapers upward (i.e., in the height direction of the air cleaner 4), with its apex located higher than the inner bottom surface of the lower casing 4a.
  • the separation chamber 5, as shown in Fig. 2 is elongated along the row of the cylinders A1-A3 of the engine.
  • the height of the air cleaner 4 is not additional to the height of the separation chamber 5.
  • the overall height of the cylinder head cover 3 is made advantageously smaller, while the individual heights of the cleaner 4 and the chamber 5 can be made greater.
  • the internal volumes of the cleaner 4 and the chamber 5 are made sufficiently large, which is advantageous to providing an excellent gas/lubricant separation function in the separation chamber 5 and an excellent noise-absorbing function in the air cleaner 4.
  • the chamber 5 is elongated along the row of the three cylinders A1-A3 (see Fig. 2). This structure serves to ensure a sufficiently large internal volume of the chamber 5.
  • an air inlet tube 6 is connected to the lower casing 4a for supply of the air.
  • the lower casing 4a is internally provided with coil-disposing portions at which three ignition coils 7 are placed. As readily seen, each coil 7 is provided for the relevant one of the cylinders A1-A3 of the internal combustion engine.
  • the upper casing 4b is connected to the inlet manifold 8 via a throttle body 9 and an inlet duct 10 with a bellows.
  • the throttle body 9 is fixed, at one end, to the manifold 8 and, at the other end, is detachably fitted into the inlet duct 10.
  • the inlet duct 10, made of an elastic material such as rubber, is connected to a blowby gas extraction port 11 extending from the separation chamber 5.
  • the blowby gas extraction port 11 is detachably fitted into the inlet duct 10.
  • blowby gas leaked into the valve system chamber 2 flows into the separation chamber 5, to be subjected to gas/lubricant separation. Then, the lubricant-removed gas is conducted through the blowby gas extraction port 11, to joint the main flow passing through the inlet duct 10.
  • FIG. 3-5 illustrating the arrangement of a cylinder head cover according to a second embodiment of the present invention.
  • the illustrated internal combustion engine includes a cylinder head 1 which is similar in arrangement to the counterpart shown in Figs. 1 and 2. On top of the cylinder head 1, there is provided a cylinder head cover 30 for enclosing a valve system chamber 2.
  • the head cover 30 is made of a synthetic resin and is detachably fixed to the cylinder head 1.
  • the cylinder head 1 is connected, at one side thereof, to an inlet manifold 80 provided with a surge tank 80a.
  • the cylinder head cover 30 is formed integral with an air cleaner 40 and with a gas/liquid separation chamber 50 for blowby gases.
  • the air cleaner 40 includes a lower casing (dust case) 40a which is disposed at substantially the same level with the separation chamber 50.
  • the lower casing 40a and the separation chamber 50 are arranged adjacent to each other.
  • the apex of the separation chamber 50 is located above the inner bottom surfaces of the lower casing 40a.
  • the lower casing 40a is connected to an air inlet tube for taking in the air.
  • Within the lower casing 40a there are provided a prescribed number of ignition coils 70 for the respective cylinders of the internal combustion engine.
  • the air cleaner 40 further includes an upper casing (clean case) 40b and a filtering element 40c.
  • the upper casing 40b made of a synthetic resin, is detachably connected to the lower casing 40a from above.
  • the filtering element 40c is provided between the lower and the upper casings 40a, 40b.
  • Numeral 90 refers to a throttle body which is provided with a throttle valve 90b.
  • the throttle body 90 is formed with a gas inlet bore 90a in which the throttle valve 90b is accommodated.
  • the throttle body 90 is located above the separation chamber 50 and is connected, at one end, to a side of the surge tank 80a by bolts 12 (see Figs. 3 and 5 ) .
  • the throttle body 90 is detachably fitted into an air exit 40d formed in the upper casing 40b of the air cleaner 40.
  • a sealing ring 13 made of an elastic material such as rubber.
  • the head cover 30 includes a horizontal upper surface 14 contacting with the throttle body 90 above the separation chamber 50.
  • the upper surface 14 is formed with a blowby gas extraction port 110 which is open upward.
  • the throttle body 90 on the other hand, includes a horizontal bottom surface 15 contacting closely with the upper surface 14 of the head cover 30. Thus, the throttle body 90 is stably positioned on the head cover 30.
  • the throttle body 90 is formed with a blowby gas inlet port 90c communicating, at its upper end, with the bore 90a.
  • the inlet port 90c is open downward in the bottom surface 15, to communicate with the above-mentioned blowby gas extraction port 110.
  • the throttle body 90 is bolted to both the cylinder head 1 and the head cover 30 in the following manner.
  • the throttle body 90 includes a first fixing leg 90d and a second fixing leg 90.
  • the first fixing leg 90d is formed with a bore allowing the insertion of the shank (but not the passage of the head) of a long bolt 16.
  • the second fixing leg 90e is formed with another bore allowing the insertion of the shank (but not the passage of the head) of a short bolt 17.
  • sealing ring 19 made of an elastic material such as rubber.
  • the illustrated sealing ring 19 is embedded in the upper contact surface 14 of the head cover 30, though the same may be provided on the throttle body 90.
  • the sealing ring 19 may be replaced by other kinds of gaskets.
  • blowby gas inlet port 90c communicates directly with the blowby gas extraction port 110.
  • the throttle body 90 is provided with conventionally known components such a bypass passage for idle control or an air valve.
  • a heater is provided at the throttle body 90 for preventing the air valve or throttle valve from freezing.
  • this heater is used for warming up the blowby gas inlet port 90c and also the blowby gas extraction port 110 which is held in direct contact with the inlet port 90c.
  • the throttle body 90 is connected to both the metal cylinder head 1 and the resin head cover 30, though the present invention is not limited to this.
  • the throttle body 90 may be connected only to the cylinder head 1.
  • the throttle body 90 may be connected only to the head cover 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP20010120268 2000-08-25 2001-08-23 Zylinderkopfdeckel für eine Brennmaschine Expired - Lifetime EP1182343B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000255679A JP3853582B2 (ja) 2000-08-25 2000-08-25 内燃機関におけるシリンダヘッドカバーの構造
JP2000255679 2000-08-25
JP2000289343 2000-09-22
JP2000289343A JP2002097920A (ja) 2000-09-22 2000-09-22 内燃機関におけるブローバイガス抽出装置

Publications (3)

Publication Number Publication Date
EP1182343A2 true EP1182343A2 (de) 2002-02-27
EP1182343A3 EP1182343A3 (de) 2003-04-02
EP1182343B1 EP1182343B1 (de) 2006-09-27

Family

ID=26598480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010120268 Expired - Lifetime EP1182343B1 (de) 2000-08-25 2001-08-23 Zylinderkopfdeckel für eine Brennmaschine

Country Status (2)

Country Link
EP (1) EP1182343B1 (de)
DE (1) DE60123350T2 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004753A1 (de) * 2004-01-30 2005-08-18 Mann + Hummel Gmbh Zylinderkopfhaube
EP1752650A1 (de) * 2004-06-01 2007-02-14 Daihatsu Motor Co., Ltd. Lufteinlassvorrichtung für brennkraftmaschine
WO2008120234A1 (en) * 2007-03-30 2008-10-09 Tata Motors Limited A novel integrated module for internal combustion inline common rail twin cylinder diesel engine
EP2112361A1 (de) * 2007-05-16 2009-10-28 Honda Motor Co., Ltd. Kopfdeckel für einen verbrennungsmotor
WO2013056763A1 (de) * 2011-10-18 2013-04-25 Daimler Ag Ansaugmodul für eine verbrennungskraftmaschine
EP2589784A1 (de) * 2011-11-02 2013-05-08 Nissan Motor Manufacturing (UK) Ltd. Kraftfahrzeugmotor mit integrierter Luftfiltereinheit
EP3211189A1 (de) * 2016-02-25 2017-08-30 Toyota Boshoku Kabushiki Kaisha Verbindungsstruktur für blowby-gas-schlauch
JP2019199808A (ja) * 2018-05-14 2019-11-21 株式会社クボタ ブローバイガス還流装置付エンジン

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01290907A (ja) 1988-05-16 1989-11-22 Daihatsu Motor Co Ltd 内燃機関のブローバイガス導入装置
JPH09112358A (ja) 1995-10-17 1997-04-28 Mitsubishi Automob Eng Co Ltd シリンダヘッドカバー

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730817A1 (de) * 1987-09-14 1989-03-23 Porsche Ag Zylinderkopfhaube mit saugrohranlage fuer eine brennkraftmaschine
FR2655383B1 (fr) * 1989-12-04 1994-05-13 Peugeot Automobiles Couvre-culasse a filtre a air integre.
JPH0734985A (ja) * 1993-07-23 1995-02-03 Kubota Corp 小型汎用エンジンの蒸発燃料吸着装置
US6095105A (en) * 1999-03-01 2000-08-01 Ford Global Technologies, Inc. Plenum/runner module having integrated engine valve cover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01290907A (ja) 1988-05-16 1989-11-22 Daihatsu Motor Co Ltd 内燃機関のブローバイガス導入装置
JPH09112358A (ja) 1995-10-17 1997-04-28 Mitsubishi Automob Eng Co Ltd シリンダヘッドカバー

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004753A1 (de) * 2004-01-30 2005-08-18 Mann + Hummel Gmbh Zylinderkopfhaube
EP1752650A4 (de) * 2004-06-01 2010-09-01 Daihatsu Motor Co Ltd Lufteinlassvorrichtung für brennkraftmaschine
EP1752650A1 (de) * 2004-06-01 2007-02-14 Daihatsu Motor Co., Ltd. Lufteinlassvorrichtung für brennkraftmaschine
US7392784B2 (en) 2004-06-01 2008-07-01 Toyota Jidosha Kabushiki Kaisha Air intake device of internal combustion engine
WO2008120234A1 (en) * 2007-03-30 2008-10-09 Tata Motors Limited A novel integrated module for internal combustion inline common rail twin cylinder diesel engine
EP2112361A4 (de) * 2007-05-16 2010-04-07 Honda Motor Co Ltd Kopfdeckel für einen verbrennungsmotor
EP2112361A1 (de) * 2007-05-16 2009-10-28 Honda Motor Co., Ltd. Kopfdeckel für einen verbrennungsmotor
CN101631946B (zh) * 2007-05-16 2011-06-22 本田技研工业株式会社 内燃机的气缸盖罩
WO2013056763A1 (de) * 2011-10-18 2013-04-25 Daimler Ag Ansaugmodul für eine verbrennungskraftmaschine
US9556835B2 (en) 2011-10-18 2017-01-31 Daimler Ag Intake module for an internal combustion engine
EP2589784A1 (de) * 2011-11-02 2013-05-08 Nissan Motor Manufacturing (UK) Ltd. Kraftfahrzeugmotor mit integrierter Luftfiltereinheit
EP3211189A1 (de) * 2016-02-25 2017-08-30 Toyota Boshoku Kabushiki Kaisha Verbindungsstruktur für blowby-gas-schlauch
JP2019199808A (ja) * 2018-05-14 2019-11-21 株式会社クボタ ブローバイガス還流装置付エンジン

Also Published As

Publication number Publication date
DE60123350D1 (de) 2006-11-09
EP1182343A3 (de) 2003-04-02
EP1182343B1 (de) 2006-09-27
DE60123350T2 (de) 2007-05-10

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