EP1686245A2 - Passage de gaz de carter - Google Patents

Passage de gaz de carter Download PDF

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Publication number
EP1686245A2
EP1686245A2 EP06250260A EP06250260A EP1686245A2 EP 1686245 A2 EP1686245 A2 EP 1686245A2 EP 06250260 A EP06250260 A EP 06250260A EP 06250260 A EP06250260 A EP 06250260A EP 1686245 A2 EP1686245 A2 EP 1686245A2
Authority
EP
European Patent Office
Prior art keywords
blowby gas
cylinder head
head cover
discharge port
port
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Withdrawn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
EP06250260A
Other languages
German (de)
English (en)
Other versions
EP1686245A3 (fr
Inventor
Takehiro Horibe
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.)
Aichi Machine Industry Co Ltd
Original Assignee
Aichi Machine Industry 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
Application filed by Aichi Machine Industry Co Ltd filed Critical Aichi Machine Industry Co Ltd
Publication of EP1686245A2 publication Critical patent/EP1686245A2/fr
Publication of EP1686245A3 publication Critical patent/EP1686245A3/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Withdrawn legal-status Critical Current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
    • 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
    • F01M13/0011—Breather valves

Definitions

  • the present invention relates to the construction of a blowby gas passage in an internal combustion engine.
  • a positive crankcase ventilation (PCV) valve which is provided in the outlet of an oil separator on a cylinder head cover, and an intake manifold are connected by a hose composing a blowby gas passage, wherein blowby gas is circulated through the hose located outside the engine.
  • PCV positive crankcase ventilation
  • a hose composing the blowby gas passage is plumbed outside the engine, so that in a very low temperature area such as a cold district there is a drawback that the blowby gas is cooled down inside the hose, and the moisture in the blowby gas is frozen to block the blowby gas passage.
  • a blowby gas passage is extending to intake ports 6, 6 of a cylinder head 5, a part of the passage being included within a cylinder head cover 1.
  • a doubled-tube hose 52 connects a connector 51 and a PCV valve 2 projecting out of a rear end wall 1a of the cylinder head cover 1.
  • the doubled-tube hose 52 needs a space to keep bending angle, so that the arrangement of parts around the periphery of the hose is difficult. This is a factor of obstructing an engine to be made in a compact type.
  • the present invention is worked out in view of the above-described problems in the prior art. It is an object of the present invention to provide a blowby gas passage construction that is capable of preventing the moisture in blowby gas from freezing and capable of reducing numbers of engine parts to make an engine in a compact type.
  • Another object of the present invention is to provide a blowby gas passage construction having the advantage that an outside pipeline of an engine becomes useless, and thereby the engine can be designed into a compact type, and the degree of freedom for arrangement of parts is improved.
  • a further object of the present invention is to provide a blowby gas passage construction including a rear cover composing a blowby gas passage, inside of which the blowby gas is warmed up to prevent the moisture in the blowby gas from freezing.
  • a further object of the present invention is to provide a blowby gas passage construction including a deep recess formed in a rear end wall of a cylinder head cover, inside of which recess the blowby gas is warmed up to prevent the moisture in the blowby gas from freezing.
  • a still further object of the present invention is to provide a blowby gas passage construction including a blowby gas introductory port positioned below the level of a discharge port in a recess, wherein the oil and moisture in the blowby gas are hard to accumulate in the recess, prevented from becoming sludge by oxidization and degradation to block the discharge port.
  • a blowby gas passage construction comprises a cylinder head cover mounted on a cylinder head of an engine, which cylinder head cover has an internal portion wherein a blowby gas inside passage is formed for leading the blowby gas into the intake ports of the cylinder head, and has a rear end wall provided on the surface thereof with a blowby gas introductory port communicating with the blowby gas inside passage and a discharge port for discharging the blowby gas out of a PCV valve; and a rear cover attached to the rear end wall for covering the blowby gas introductory port and the discharge port and for making communication between both the ports.
  • the second subject matter is that in the above blowby gas passage construction the blowby gas introductory port and the discharge port are provided within a recess formed in the wall surface of the cylinder head cover, both the ports are positioned under the wall surface, and the rear cover is made in a flat board for covering the recess.
  • the third subject matter is that in the above blowby gas passage construction the blowby gas introductory port is positioned below the level of the discharge port.
  • FIG.1 there is shown a rear end portion of a cylinder head cover 1 in accordance with the first embodiment of the present invention.
  • a blowby gas inside passage 3 (not shown), in the same way as shown in FIG.9.
  • the cylinder head cover 1 that is mounted on a cylinder head 5 is provided with flange portions 1c, 1c which are fixed by bolts to mounting flange surfaces 5a, 5a of the cylinder head 5.
  • the blowby gas inside passage 3 is formed within the cylinder head cover 1 along a side wall 1b in the direction of a row of cylinders.
  • the blowby gas inside passage 3 communicates with introductory passages 4, 4 provided vertically in the flange portions 1c, 1c.
  • introductory passages 4, 4 communicating with the introductory passages 4, 4 of the cylinder head cover 1.
  • Each of the introductory passages 4, 4 communicates with each of intake ports 6, 6 of the cylinders in the cylinder head 5.
  • a shallow recess 7 in which is provided a discharge port 2a of a PCV valve 2, the tip end of which slightly projects from the surface of the rear end wall 1a. Also, in the recess 7 is provided a blowby gas introductory port 3a at a position below the level of the discharge port 2a, which port 3a communicates with the blowby gas inside passage 3 (not shown) that is formed in the cylinder head cover 1.
  • a rear cover 10 for covering the recess 7.
  • a flange portion 10a with through holes 10c, 10c for a screw 11 respectively.
  • the rear cover 10 is integrally formed with a cover-inside passage portion 10b on the inside of the flange portion 10a.
  • the cover-inside passage portion 10b has a shape agreeing with that of the recess 7 and projects outward, of which the hollow inside is a communication space S.
  • the rear end wall 1a is provided with screw holes 8, 8 in the periphery of the recess 7 to attach the rear cover 10 by screws 11, 11.
  • FIG.2 is a front view of the rear cover 10 fixed by screw 11 to the rear end wall 1a of the cylinder head cover 1;
  • FIG.3 is a section taken on line X-X in FIG.2;
  • FIG.4 is a section taken on line Y-Y in FIG.2;
  • FIG.5 is a section taken on line Z-Z in FIG.2; and
  • FIG.6 is a section taken on line W-W in FIG.3.
  • a baffle plate 12 in FIG.4 and 5
  • a vapor-liquid separation chamber 13 in FIG.5 and 6) in the position possible to communicate with the PCV valve 2.
  • the vapor-liquid separation chamber 13 is provided for purpose of separating oil out of blowby gas.
  • Blowby gas (unburned gas) generated in a crankcase includes engine oil in mist, vapor or liquid condition.
  • the blowby gas including oil adheres to the inside of the intake passage and is carbonized to become carbon by heat generated in the engine. To avoid such a problem, the oil is separated in the vapor-liquid separation chamber 13.
  • blowby gas in which the oil is removed in the vapor-liquid separation chamber 13, is blown out of the discharge port 2a of PCV valve 2 into the communication space S within the rear cover 10. Further, the blowby gas is introduced from the blowby gas introductory port 3a into the blowby gas inside passage 3, and then from the introductory passage 4 into the intake port 6.
  • the inside of the communication space S is warmed by heat of an engine.
  • the distance between the discharge port 2a and the blowby gas introductory port 3a is very short, so that the time is short that the flow of blowby gas keeps in contact with the side of the open air.
  • the moisture in the blowby gas is prevented from freezing.
  • the blowby gas flows through the blowby gas inside passage 3 in the cylinder head cover 1 that is warmed up by heat of the engine, the moisture in the blowby gas is prevented from freezing. Therefore, it can be avoided that the blowby gas passage is obstructed.
  • the rear cover 10 made of aluminum is warmed by generation of heat in an engine, so that the inside of the communication space S can be well warmed up.
  • blowby gas introductory port 3a is positioned below the level of the discharge port 2a, it is avoided that the discharge port 2a of PCV valve 2 is obstructed by oil and moisture in the blowby gas accumulated in the communication space S. That is, the oil and moisture in the blowby gas are drained away from the blowby gas introductory port 3a positioned at a lower level to the lower course smoothly. As a result, the oil and moisture in the blowby gas are difficult to accumulate in the communication space S.
  • the rear end wall 1a of the cylinder head cover 1 is directly provided with a PCV valve 2 and a discharge port 2a which are projecting outward from the surface of the rear end wall 1a. Also, the rear end wall 1a is provided with a blowby gas introductory port 3a.
  • the rear cover 10 comprises a flange portion 10a and a cover-inside passage portion 10b inside of which is formed a communication space S with sufficient depth for covering the PCV valve 2, the discharge port 2a and the blowby gas introductory port 3a.
  • This type of cylinder head cover 1 in FIG.7 is easy to manufacture because of its simple construction that there is no need to form a recess 7 in the rear end wall 1a.
  • FIG.8 an exploded view of another variation according to this invention, there is an inverse relationship with the case of FIG.7.
  • the rear end wall 1a of the cylinder head cover 1 is provided with a deep recess 7, in which are formed a discharge port 2a of PCV valve 2 that is not projecting outside of the recess 7.
  • a blowby gas introductory port 3a is provided in the bottom of the recess 7 in the bottom of the recess 7 .
  • the discharge port 2a does not project out of the surface of the rear end wall 1a. Therefore, it becomes possible to favorably form a communication space S within the recess 7 by covering it with a board rear cover 10 attached to the rear end surface 1a. As a result, it becomes possible to simplify the shape of the rear cover 10. Moreover, the inside of the recess 7 is favorably warmed up by the heat of the cylinder head cover 1 during engine operation, so that the moisture in the blowby gas is more surely prevented from freezing.

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)
EP06250260A 2005-01-26 2006-01-18 Passage de gaz de carter Withdrawn EP1686245A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005018990A JP2006207437A (ja) 2005-01-26 2005-01-26 内燃機関のブローバイガス通路構造。

Publications (2)

Publication Number Publication Date
EP1686245A2 true EP1686245A2 (fr) 2006-08-02
EP1686245A3 EP1686245A3 (fr) 2010-06-02

Family

ID=36371769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06250260A Withdrawn EP1686245A3 (fr) 2005-01-26 2006-01-18 Passage de gaz de carter

Country Status (3)

Country Link
EP (1) EP1686245A3 (fr)
JP (1) JP2006207437A (fr)
CN (1) CN100532795C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022148A (zh) * 2018-10-10 2020-04-17 现代自动车株式会社 用于发动机的漏气净化设备以及端口适配器

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4730279B2 (ja) * 2006-10-23 2011-07-20 マツダ株式会社 エンジンの吸気装置
JP4954114B2 (ja) 2008-02-18 2012-06-13 愛知機械工業株式会社 ブローバイガス還流構造およびこれを備える内燃機関
JP5277000B2 (ja) * 2009-01-19 2013-08-28 本田技研工業株式会社 Ｐｃｖ通路
JP5536578B2 (ja) * 2010-07-22 2014-07-02 株式会社マキタ ４サイクルエンジンの潤滑装置
JP5335880B2 (ja) * 2011-11-25 2013-11-06 本田技研工業株式会社 内燃機関のブローバイ通路構造
JP6135102B2 (ja) * 2012-11-22 2017-05-31 アイシン精機株式会社 ブローバイガス還元装置
JP6365310B2 (ja) * 2015-01-07 2018-08-01 スズキ株式会社 内燃機関
CN114151221B (zh) * 2021-12-07 2023-08-08 青岛再特模具有限公司 一种发动机缸盖罩盖内置pcv阀的集成压装结构
CN115788618B (zh) * 2022-11-29 2024-04-23 重庆长安汽车股份有限公司 一种内置式pcv阀安装结构、内燃机及车辆

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0530410U (ja) 1991-09-27 1993-04-23 日産デイーゼル工業株式会社 ブローバイガス循環ホース
JPH068714B2 (ja) * 1985-04-10 1994-02-02 松下冷機株式会社 高周波解凍装置付冷蔵庫
JPH0893436A (ja) 1994-09-20 1996-04-09 Nissan Motor Co Ltd 内燃機関のブローバイガス換気装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759U (fr) * 1980-05-30 1982-01-05
JPS6018564Y2 (ja) * 1980-10-02 1985-06-05 ヤンマーディーゼル株式会社 頭上弁式内燃機関のブリ−ザ装置
US4602607A (en) * 1985-02-25 1986-07-29 General Motors Corporation Internal crankcase ventilation system with easily accessible PCV valve
IT1221426B (it) * 1988-05-13 1990-07-06 Lombardini Fabbr Ital Motori S Coperchio del vano bilancieri delle valvole per motori a combustione interna,con dispositivo antirisucchio dell' olio lubrificante
JP3307507B2 (ja) * 1994-06-23 2002-07-24 東京瓦斯株式会社 フルイディック流量計
JPH08200033A (ja) * 1995-01-24 1996-08-06 Aichi Mach Ind Co Ltd ブローバイガス還元装置
US6065457A (en) * 1998-06-30 2000-05-23 Harley-Davidson Motor Company Breather assembly for an internal combustion engine
JP3861560B2 (ja) * 2000-04-21 2006-12-20 日産自動車株式会社 エンジン
JP4042951B2 (ja) * 2001-06-29 2008-02-06 本田技研工業株式会社 ブローバイガス還元装置
JP2003090207A (ja) * 2001-09-18 2003-03-28 Yanmar Co Ltd エンジンのブリーザ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH068714B2 (ja) * 1985-04-10 1994-02-02 松下冷機株式会社 高周波解凍装置付冷蔵庫
JPH0530410U (ja) 1991-09-27 1993-04-23 日産デイーゼル工業株式会社 ブローバイガス循環ホース
JPH0893436A (ja) 1994-09-20 1996-04-09 Nissan Motor Co Ltd 内燃機関のブローバイガス換気装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022148A (zh) * 2018-10-10 2020-04-17 现代自动车株式会社 用于发动机的漏气净化设备以及端口适配器

Also Published As

Publication number Publication date
CN100532795C (zh) 2009-08-26
CN1811138A (zh) 2006-08-02
EP1686245A3 (fr) 2010-06-02
JP2006207437A (ja) 2006-08-10

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