EP3059404A1 - Dispositif de lubrification pour moteur - Google Patents

Dispositif de lubrification pour moteur Download PDF

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Publication number
EP3059404A1
EP3059404A1 EP16000348.9A EP16000348A EP3059404A1 EP 3059404 A1 EP3059404 A1 EP 3059404A1 EP 16000348 A EP16000348 A EP 16000348A EP 3059404 A1 EP3059404 A1 EP 3059404A1
Authority
EP
European Patent Office
Prior art keywords
chamber
oil
opening part
crank
crank chamber
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Withdrawn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
EP16000348.9A
Other languages
German (de)
English (en)
Inventor
Tomoyuki Kutsuna
Hiroki Sugiyama
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.)
Makita Corp
Original Assignee
Makita Corp
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 Makita Corp filed Critical Makita Corp
Publication of EP3059404A1 publication Critical patent/EP3059404A1/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Withdrawn legal-status Critical Current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
    • F01M1/00—Pressure lubrication
    • F01M1/04—Pressure lubrication using pressure in working cylinder or crankcase to operate lubricant feeding devices
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • 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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries

Definitions

  • FIG. 1 and FIG. 2 are a perspective view and a plan view, respectively, of an engine according to an embodiment of the present invention.
  • FIG. 3 is a sectional view taken at line I-I in FIG. 2 .
  • FIG. 3 illustrates the engine when a piston is positioned near a top dead center.
  • "upper side" approximately coincides with a vertical upper side in a state in which the engine is used over a longest period of time (erect state).
  • the cylinder head 6 includes a valve system chamber 20, which accommodates the intake valve 18 and the exhaust valve 19.
  • the valve system chamber 20 is formed of the cylinder head 6 and a valve system chamber cover 21.
  • the mist oil in the oil sump chamber 32 passes through the first opening part 35 and is supplied to the crank chamber 3. Thereafter, if the piston 11 moves toward a bottom dead center, causing the pressure in the crank chamber 3 to become a positive pressure, then the mist oil in the crank chamber 3 passes through the second opening part 45 and is supplied to the valve drive chamber 30 and the valve system chamber 20.
  • the gas in the crank chamber 3 is injected through the first opening part 35 into the oil sump chamber 32 and impacts the oil in the oil sump chamber 32 thereby to generate the mist oil in the oil sump chamber 32, and the mist oil in the crank chamber 3 passes through the second opening part 45 and is supplied to the valve drive chamber 30.
  • the mist oil in the oil sump chamber 32 passes through the first opening part 35 and is supplied to the crank chamber 3.
  • the high-pressure gas from the crank chamber 3 is blown onto the oil surface in the oil sump chamber 32 so as to disturb the oil surface. This makes it possible to expedite the misting of the oil in the oil sump chamber 32, thus efficiently generating a mist oil in the oil sump chamber 32.
  • the first opening part 35 is positioned in the projection plane of the piston 11 in the first partition wall 33. Therefore, the high-pressure gas generated in the crank chamber 3 by the reciprocation of the piston 11 can be vigorously blown, through the first opening part 35, onto the oil surface in the oil sump chamber 32 to disturb the oil surface, thus permitting more efficient generation of the mist oil in the oil sump chamber 32.
  • the flow velocity of the gas injected through the first opening part 35 into the oil sump chamber 32 and blown onto the surface of the oil in the oil sump chamber 32 is preferably within a range of from 1,000 cm/s up to 10,000 cm/s, and more preferably within a range of from 1,500 cm/s up to 8,000 cm/s. Setting the blowoff velocity of the gas at the first opening part 35 to the ranges mentioned above permits efficient generation of the mist oil in the oil sump chamber 32.
  • the engine 1 in the present embodiment can be installed, as a drive source, in a portable work machine, such as a brush/weed cutter, a hole digging machine, or a concrete cutter. Furthermore, the engine 1 can be installed, as a drive source, in a backpack work machine, such as a backpack blower, a sprayer, a duster, or a backpack brush/weed cutter.
  • a portable work machine such as a brush/weed cutter, a hole digging machine, or a concrete cutter.
  • the engine 1 can be installed, as a drive source, in a backpack work machine, such as a backpack blower, a sprayer, a duster, or a backpack brush/weed cutter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP16000348.9A 2015-02-05 2016-02-02 Dispositif de lubrification pour moteur Withdrawn EP3059404A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015020886A JP6357119B2 (ja) 2015-02-05 2015-02-05 エンジンの潤滑装置

Publications (1)

Publication Number Publication Date
EP3059404A1 true EP3059404A1 (fr) 2016-08-24

Family

ID=55411145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000348.9A Withdrawn EP3059404A1 (fr) 2015-02-05 2016-02-02 Dispositif de lubrification pour moteur

Country Status (4)

Country Link
US (1) US20160230621A1 (fr)
EP (1) EP3059404A1 (fr)
JP (1) JP6357119B2 (fr)
CN (1) CN105863772A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108343486B (zh) * 2017-12-30 2024-04-09 浙江亚特电器股份有限公司 一种四冲程发动机的油气润滑系统和带四冲程发动机的工具设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119648A (en) * 1996-09-05 2000-09-19 Kioritz Corporation Four-stroke cycle internal combustion engine
US20010045199A1 (en) * 2000-05-29 2001-11-29 Noboru Nagai Internal combustion engine
JP2004293448A (ja) 2003-03-27 2004-10-21 Kioritz Corp ４サイクル内燃機関
EP1749984A1 (fr) * 2005-08-03 2007-02-07 ETG Limited Dispositif de lubrification d'un moteur à 4 temps pour outil motorisé
WO2011039980A1 (fr) * 2009-09-30 2011-04-07 Hitachi Koki Co., Ltd. Moteur à quatre temps, débroussailleuse et outil à moteur équipé de ces derniers

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887520B1 (fr) * 1997-06-26 2002-08-21 Ishikawajima-Shibaura Machinery Co., Ltd. Dispositif de lubrification pour moteur à quatre temps
JPH1136839A (ja) * 1997-07-17 1999-02-09 Fuji Heavy Ind Ltd ４サイクルエンジンの潤滑装置
JP2000073729A (ja) * 1998-09-01 2000-03-07 Kioritz Corp ４サイクル内燃機関
JP4478323B2 (ja) * 2000-12-18 2010-06-09 株式会社やまびこ ４サイクル内燃エンジン
US8281758B2 (en) * 2005-08-03 2012-10-09 Etg Limited Engine lubrication method
TW200905065A (en) * 2007-07-17 2009-02-01 Si-Liang Lin Engine lubrication loop device
JP5463111B2 (ja) * 2009-09-24 2014-04-09 株式会社マキタ 携帯型４サイクルエンジンの潤滑装置
US8695563B2 (en) * 2009-09-24 2014-04-15 Makita Corporation Lubrication system for four-stroke engine
CN102597439B (zh) * 2009-10-21 2014-04-09 株式会社牧田 四冲程发动机的润滑装置
JP5414477B2 (ja) * 2009-11-26 2014-02-12 株式会社やまびこ ４サイクルエンジンの潤滑装置
JP5316462B2 (ja) * 2010-03-31 2013-10-16 日立工機株式会社 エンジン工具
US20150020760A1 (en) * 2011-09-22 2015-01-22 Etg Limited Four-cycle Internal Combustion Engine
US8627809B2 (en) * 2011-09-22 2014-01-14 Etg Limited Engine lubrication method
JP5826017B2 (ja) * 2011-12-22 2015-12-02 株式会社マキタ ４ストロークエンジン
CN103321709B (zh) * 2012-06-15 2015-09-30 苏州科瓴精密机械科技有限公司 四冲程发动机的润滑系统
CN104196624A (zh) * 2014-08-26 2014-12-10 台州庆隆机电有限公司 四冲程发动机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119648A (en) * 1996-09-05 2000-09-19 Kioritz Corporation Four-stroke cycle internal combustion engine
US20010045199A1 (en) * 2000-05-29 2001-11-29 Noboru Nagai Internal combustion engine
JP2004293448A (ja) 2003-03-27 2004-10-21 Kioritz Corp ４サイクル内燃機関
EP1749984A1 (fr) * 2005-08-03 2007-02-07 ETG Limited Dispositif de lubrification d'un moteur à 4 temps pour outil motorisé
WO2011039980A1 (fr) * 2009-09-30 2011-04-07 Hitachi Koki Co., Ltd. Moteur à quatre temps, débroussailleuse et outil à moteur équipé de ces derniers

Also Published As

Publication number Publication date
JP2016142240A (ja) 2016-08-08
US20160230621A1 (en) 2016-08-11
CN105863772A (zh) 2016-08-17
JP6357119B2 (ja) 2018-07-11

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