WO2013035154A1 - エンジンの換気装置 - Google Patents
エンジンの換気装置 Download PDFInfo
- Publication number
- WO2013035154A1 WO2013035154A1 PCT/JP2011/070242 JP2011070242W WO2013035154A1 WO 2013035154 A1 WO2013035154 A1 WO 2013035154A1 JP 2011070242 W JP2011070242 W JP 2011070242W WO 2013035154 A1 WO2013035154 A1 WO 2013035154A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- passage
- engine
- return passage
- common
- Prior art date
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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
-
- 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
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
- F01M2011/023—Arrangements of lubricant conduits between oil sump and cylinder head
-
- 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
- F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
Definitions
- the present invention relates to an engine ventilation device including a return passage for returning blow-by gas in a crankcase to an intake passage of the engine.
- a ventilation device for this type of engine for example, there is a device described in Patent Document 1.
- a conventional general engine ventilation device including the device described in Patent Document 1, the blow-by gas leaked from the combustion chamber into the crankcase through the gap between the piston and the cylinder is sucked into the intake passage through the return passage. By doing so, the inside of the crankcase is ventilated.
- the return passage in such a conventional ventilator does not have an opening that opens to another space other than the end on the crankcase side and the end on the intake passage side to prevent leakage of blow-by gas.
- the blow-by gas contains oil mist, and when such oil mist is directly returned to the intake passage, the oil adheres to the inner wall of the intake passage. Therefore, in the technique described in Patent Document 1, an oil reservoir groove (2) is provided in the middle of the reflux passage so that blow-by gas passes through the oil stored in the oil reservoir groove (2). By doing so, removal of the oil mist contained in blow-by gas is aimed at (refer to Drawing 1 of patent documents 1).
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide an engine that can suitably reduce oil mist contained in blow-by gas until the blow-by gas is returned to the intake passage through the return passage. It is to provide a ventilation device.
- an engine ventilation system includes a return path for returning oil to an oil pan in an engine ventilation system including a return path for returning blow-by gas in a crankcase to an intake path of the engine.
- the return passage is formed with a common portion which is an internal space common to the reflux passage and is a space where oil falls due to its own weight.
- the blow-by gas when the blow-by gas ascends in the recirculation passage toward the intake passage, the blow-by gas collides with an oil droplet falling due to its own weight in the common part in the middle of the recirculation passage. For this reason, the oil mist contained in the blow-by gas is adsorbed by the oil droplets.
- the intermolecular force (surface tension) for maintaining the oil droplet is larger than the collision pressure by the oil mist, bubbling does not occur at the time of such collision. Therefore, the oil mist contained in the blow-by gas can be suitably reduced until the blow-by gas is returned to the intake passage through the return passage.
- the portion of the return passage including the common portion extends along the vertical direction.
- the return passage is a passage for returning the oil in the cam chamber of the cylinder head to the oil pan.
- the oil supplied to each part of the engine is discharged into the cam chamber of the cylinder head and returned to the oil pan through the return passage, so that a large amount of oil flows inside the common part.
- the oil mist flowing in the reflux passage preferably collides with the oil droplets falling inside the common portion.
- the oil mist contained in the blow-by gas is further adsorbed by the oil droplets.
- the common portion is provided outside the cylinder head and the cylinder block.
- the return passage has a communication portion that communicates the inside of the chain case with the reflux passage.
- a part of the oil existing inside the chain case is returned to the oil pan through the communication part and the common part, so that a lot of oil flows inside the common part.
- the oil mist flowing in the reflux passage preferably collides with the oil droplets falling inside the common portion.
- the oil mist contained in the blow-by gas is further adsorbed by the oil droplets.
- the common part is a part from the connection part with the communication part to the end part on the oil pan side in the reflux passage.
- the length of the common part in the flow direction of blow-by gas can be increased. For this reason, the frequency with which oil mist collides with the oil droplet which falls in the inside of a common part can be raised. Accordingly, the oil mist contained in the blow-by gas is further adsorbed by the oil droplets.
- FIG. 1 is a schematic configuration diagram showing a schematic configuration of an engine to which the ventilator is applied according to a first embodiment of an engine ventilator according to the present invention.
- the schematic block diagram which shows schematic structure of the engine to which the ventilation apparatus is applied about 2nd Embodiment of the ventilation apparatus of the engine which concerns on this invention.
- the schematic block diagram which shows schematic structure of the ventilation apparatus of the engine which concerns on the modification of 1st Embodiment.
- FIG. 1 shows a schematic configuration of an engine 1 to which the engine ventilation device of the present embodiment is applied.
- the engine 1 is an in-line four-cylinder gasoline engine, but FIG. 1 does not show a piston that reciprocates and a cylinder that houses the piston. That is, FIG. 1 mainly shows the blow-by gas passage and the oil passage in detail for easy understanding of the present invention, and illustration of internal components of the engine 1 is omitted as appropriate.
- the engine 1 includes a cylinder block 2 in which a cylinder is formed, and a cylinder head 3 provided at the upper end of the cylinder block 2.
- the cylinder head 3 is provided with a valve operating system including an intake valve, an exhaust valve, and cam shafts to which the cams that drive these valves are connected.
- the lower end of the cylinder block 2 is provided with a crankcase 4 for housing the crankshaft.
- An oil pan 5 for storing oil is provided at the lower end of the crankcase 4.
- a chain case 6 is attached to the side surface of the cylinder block 2.
- a chain for transmitting the rotation of the crankshaft to each camshaft is provided inside the chain case 6.
- the cylinder block 2 and the cylinder head 3 are formed with a return passage 8 constituting a ventilation device.
- An oil separator 31 that constitutes a part of the reflux passage 8 is disposed at the upper end of the cylinder head 3.
- the oil separator 31 communicates with the air supply passage.
- the cylinder head 3 is formed with a cam chamber 32 for accommodating the cams.
- the cam chamber 32 temporarily stores oil that has been used for lubrication of each part of the engine 1.
- a return passage 7 for returning the oil stored in the cam chamber 32 to the oil pan 5 is formed.
- the return passage 7 extends along the vertical direction.
- the reflux passage 8 is connected in a crossing manner.
- a portion where the return passage 7 and the return passage 8 intersect (hereinafter, the common portion 9) is a common internal space of the passages 7 and 8. That is, the internal space of the common portion 9 is a space where the oil in the return passage 7 falls due to its own weight.
- the ventilation device of the engine 1 includes a return passage 8 that recirculates the blow-by gas in the crankcase 4 to the intake passage of the engine 1.
- the ventilator also includes a return passage 7 for returning oil to the oil pan 5.
- the return passage 7 is formed with a common portion 9 which is an internal space common to the reflux passage 8 and is a space where oil falls due to its own weight. Specifically, the portion of the return passage 7 including the common portion 9 extends along the vertical direction. According to such a configuration, the oil mist contained in the blow-by gas can be suitably reduced before the blow-by gas is returned to the intake passage through the recirculation passage 8.
- the return passage 7 is a passage for returning the oil in the cam chamber 32 of the cylinder head 3 to the oil pan 5.
- the oil supplied to each part of the engine 1 is discharged into the cam chamber 32 of the cylinder head 3 and returned to the oil pan 5 through the return passage 7. Begins to flow.
- the oil mist flowing in the reflux passage 8 preferably collides with the oil droplets falling inside the common portion 9.
- the oil mist contained in the blow-by gas is adsorbed by the oil droplets.
- FIG. 2 shows a schematic configuration of an engine 101 to which the engine ventilation device of the present embodiment is applied.
- the return passage 107 is not a passage for returning the oil from the cam chamber to the oil pan 105, but has a communication portion 171 that connects the inside of the chain case 106 and the return passage 108. This is different from the first embodiment.
- the same configuration as in the first embodiment and the corresponding configuration are denoted by the reference numerals with “100” added, and redundant description is omitted.
- the cylinder block 102 and the cylinder head 103 are formed with a reflux passage 108 that constitutes a ventilation device.
- the reflux passage 108 extends along the vertical direction.
- the cylinder block 102 is formed with a communication portion 171 that communicates the inside of the chain case 106 with the reflux passage 108.
- the passage sectional area of the communication portion 171 is made smaller than the passage sectional area of the reflux passage 108.
- an oil jet mechanism that supplies oil toward the chain is provided inside the chain case 106, and oil that bounces after being supplied toward the chain from the oil jet mechanism is introduced into the opening of the communication portion 171. It has come to be. That is, the return passage 107 is a portion from the connection portion of the communication portion 171 and the communication portion 171 in the reflux passage 108 to the end portion on the oil pan 105 side.
- the part from the connection part with the communicating part 171 to the end part on the oil pan 105 side in the reflux passage 108 is a common part 109. That is, the return passage 107 is composed of the communication portion 171 and the common portion 171, and the internal space of the common portion 109 is a space where oil in the return passage 107 falls due to its own weight.
- the blow-by gas rises in the recirculation passage 108 toward the intake passage, the blow-by gas is in the common portion 109 in the middle of the recirculation passage 108 (from the end of the recirculation passage 108 on the oil pan 105 side to the communication portion 171). Collide with oil droplets falling due to their own weight. For this reason, the oil mist contained in the blow-by gas is adsorbed by the oil droplets.
- the intermolecular force for maintaining the oil droplet is larger than the collision pressure caused by the oil mist, bubbling does not occur during such collision.
- the return passage 107 has a communication portion 171 that connects the inside of the chain case 106 and the return passage 108. According to such a configuration, a part of the oil existing inside the chain case 106 is returned to the oil pan 105 through the communication portion 171 and the common portion 109, so that a large amount of oil flows inside the common portion 109. . For this reason, the oil mist flowing in the recirculation passage 108 preferably collides with the oil droplet falling in the common portion 109. As a result, the oil mist contained in the blow-by gas is adsorbed by the oil droplets.
- the common part 109 is a part from the connection part with the communication part 171 to the end part on the oil pan 105 side in the reflux passage 108. According to such a structure, the length of the common part 109 in the flow direction of blow-by gas can be increased. For this reason, the frequency with which oil mist collides with the oil droplet which falls in the inside of the common part 109 can be raised. Accordingly, the oil mist contained in the blow-by gas is favorably adsorbed by the oil droplets.
- the communication section 171 has a passage sectional area smaller than that of the reflux passage 108. If the cross-sectional area of the communication portion is equal to or larger than the cross-sectional area of the reflux passage, blow-by gas may leak into the chain case through the communication portion that connects the reflux passage and the inside of the chain case. .
- the passage cross-sectional area of the communication portion 171 is made smaller than the passage cross-sectional area of the reflux passage 108, so that the inside of the communication portion 171 is maintained in a state of being blocked by oil. For this reason, it is possible to suitably suppress the blow-by gas from leaking into the chain case 106 through the communication portion 171.
- engine ventilation apparatus is not limited to the configuration exemplified in the above-described embodiment, and can be implemented as, for example, the following forms appropriately modified.
- the configuration in which the common portion 9 is provided inside the cylinder block 2 is illustrated (see FIG. 1).
- the common portion 9 since negative pressure is introduced into the recirculation passage 8 from the intake passage, oil from the return passage 7 sucks up to the intake passage side through the common portion 9 and the recirculation passage 8 unless the volume of the common portion 9 is large to some extent. There is a risk of being.
- the volume of the common portion 9 may not be increased due to space constraints inside the cylinder block 2.
- the common portion 209 may be provided outside the cylinder head 203 and the cylinder block 202 as shown in FIG.
- an upstream side pipe 281 and a downstream side pipe 282 that constitute the return passage 208 are disposed outside the cylinder block 202 and the cylinder head 203, and a passage that is larger than these pipes 281 and 282 is interposed between them.
- a case 291 having an area is connected.
- an upper pipe 271 and a lower pipe 272 constituting a return passage 207 are disposed outside the cylinder block 202 and the cylinder head 203, and a case 291 is connected between them.
- the passage sectional area of the case 291 is made larger than the passage sectional areas of the pipes 271 and 272.
- the inside of the case 291 is a common portion 209, which is a space where oil falls due to its own weight. In this case, it is possible to easily set the volume of the common portion 209 accurately, and it is possible to accurately suppress the oil suction as described above.
- the common part 109 is illustrated as the part from the connection part with the communication part 171 to the end part on the oil pan 105 side in the reflux passage 108.
- the present invention is not limited to this.
- the return passage and the return passage may intersect in a cross shape.
- the angle at which the return passage and the return passage intersect each other is not limited to 90 degrees, and can be changed as appropriate.
- the passage cross-sectional area of the communication portion 171 is made smaller than the passage cross-sectional area of the reflux passage 108, so that the inside of the communication portion 171 is kept closed with oil.
- the blow-by gas can be suitably prevented from leaking into the chain case 106 through the communication portion 171.
- the passage cross-sectional area of the communication portion can be made the same as the cross-sectional area of the recirculation passage, or larger than the cross-sectional area of the recirculation passage.
- the oil after the return passage is used for lubrication of each part of the engine is returned to the oil pan.
- the return passage according to the present invention only needs to return oil to the oil pan, and may return oil before being used for lubrication of each part of the engine to the oil pan.
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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)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Claims (6)
- クランクケース内のブローバイガスをエンジンの吸気通路に還流させる還流通路を備えるエンジンの換気装置において、
オイルパンにオイルを戻す戻し通路を備え、
前記戻し通路には前記還流通路と共通の内部空間であってオイルが自重により落下する空間である共通部が形成されている
ことを特徴とするエンジンの換気装置。 - 請求項1に記載のエンジンの換気装置において、
前記共通部を含む前記戻し通路の部位が鉛直方向に沿って延びている
ことを特徴とするエンジンの換気装置。 - 請求項1又は請求項2に記載のエンジンの換気装置において、
前記戻し通路はシリンダヘッドのカム室内のオイルをオイルパンに戻す通路とされている
ことを特徴とするエンジンの換気装置。 - 請求項1~請求項3のいずれか一項に記載のエンジンの換気装置において、
前記共通部はシリンダヘッド及びシリンダブロックの外部に設けられている
ことを特徴とするエンジンの換気装置。 - 請求項1又は請求項2に記載のエンジンの換気装置において、
前記戻し通路はチェーンケースの内部と前記還流通路とを連通する連通部を有している
ことを特徴とするエンジンの換気装置。 - 請求項5に記載のエンジンの換気装置において、
前記共通部は前記還流通路において前記連通部との接続部位からオイルパン側の端部までの部位とされている
ことを特徴とするエンジンの換気装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11871939.2A EP2754864B1 (en) | 2011-09-06 | 2011-09-06 | Engine ventilation apparatus |
CN201180073247.0A CN103782000B (zh) | 2011-09-06 | 2011-09-06 | 发动机的通风装置 |
PCT/JP2011/070242 WO2013035154A1 (ja) | 2011-09-06 | 2011-09-06 | エンジンの換気装置 |
US14/342,687 US9085998B2 (en) | 2011-09-06 | 2011-09-06 | Engine ventilation apparatus |
JP2013532341A JP5787115B2 (ja) | 2011-09-06 | 2011-09-06 | エンジンの換気装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/070242 WO2013035154A1 (ja) | 2011-09-06 | 2011-09-06 | エンジンの換気装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013035154A1 true WO2013035154A1 (ja) | 2013-03-14 |
Family
ID=47831641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/070242 WO2013035154A1 (ja) | 2011-09-06 | 2011-09-06 | エンジンの換気装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9085998B2 (ja) |
EP (1) | EP2754864B1 (ja) |
JP (1) | JP5787115B2 (ja) |
CN (1) | CN103782000B (ja) |
WO (1) | WO2013035154A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015194102A (ja) * | 2014-03-31 | 2015-11-05 | ダイハツ工業株式会社 | 内燃機関のシリンダブロック |
JP2016056783A (ja) * | 2014-09-12 | 2016-04-21 | スズキ株式会社 | 内燃機関のオイル分離構造 |
JP2016065472A (ja) * | 2014-09-24 | 2016-04-28 | スズキ株式会社 | 内燃機関のオイル分離構造 |
Families Citing this family (4)
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DE102011120782A1 (de) * | 2011-12-09 | 2013-06-13 | Volkswagen Aktiengesellschaft | Brennkraftmaschine und Verfahren zum Betrieb einer Brennkraftmaschine |
CN104389691A (zh) * | 2014-10-15 | 2015-03-04 | 力帆实业(集团)股份有限公司 | 发动机曲轴箱体油气分离结构 |
CN106382142B (zh) * | 2016-10-21 | 2019-04-30 | 东风商用车有限公司 | 一种发动机局部机油防乳化系统及其使用方法 |
DE102019200978B4 (de) * | 2019-01-25 | 2020-11-12 | Vitesco Technologies GmbH | Verfahren und Vorrichtung zur Überprüfung der Funktionsfähigkeit eines Kurbelgehäuseentlüftungssystems eines Verbrennungsmotors |
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2011
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- 2011-09-06 WO PCT/JP2011/070242 patent/WO2013035154A1/ja active Application Filing
- 2011-09-06 US US14/342,687 patent/US9085998B2/en not_active Expired - Fee Related
- 2011-09-06 JP JP2013532341A patent/JP5787115B2/ja not_active Expired - Fee Related
- 2011-09-06 EP EP11871939.2A patent/EP2754864B1/en not_active Not-in-force
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JPS6390035U (ja) * | 1986-12-02 | 1988-06-11 | ||
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Title |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015194102A (ja) * | 2014-03-31 | 2015-11-05 | ダイハツ工業株式会社 | 内燃機関のシリンダブロック |
JP2016056783A (ja) * | 2014-09-12 | 2016-04-21 | スズキ株式会社 | 内燃機関のオイル分離構造 |
JP2016065472A (ja) * | 2014-09-24 | 2016-04-28 | スズキ株式会社 | 内燃機関のオイル分離構造 |
Also Published As
Publication number | Publication date |
---|---|
EP2754864A4 (en) | 2015-02-18 |
EP2754864A1 (en) | 2014-07-16 |
EP2754864B1 (en) | 2017-04-05 |
US9085998B2 (en) | 2015-07-21 |
CN103782000B (zh) | 2017-05-17 |
US20140202438A1 (en) | 2014-07-24 |
CN103782000A (zh) | 2014-05-07 |
JP5787115B2 (ja) | 2015-09-30 |
JPWO2013035154A1 (ja) | 2015-03-23 |
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