US20160376950A1 - Blow-by gas oil separator - Google Patents

Blow-by gas oil separator Download PDF

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Publication number
US20160376950A1
US20160376950A1 US15/112,919 US201415112919A US2016376950A1 US 20160376950 A1 US20160376950 A1 US 20160376950A1 US 201415112919 A US201415112919 A US 201415112919A US 2016376950 A1 US2016376950 A1 US 2016376950A1
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United States
Prior art keywords
oil
blow
gas
cyclones
channel
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Abandoned
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US15/112,919
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English (en)
Inventor
Naoki Kira
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Aisin Corp
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Aisin Seiki Co Ltd
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Publication date
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Assigned to AISIN SEIKI KABUSHIKI KAISHA reassignment AISIN SEIKI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIRA, NAOKI
Publication of US20160376950A1 publication Critical patent/US20160376950A1/en
Abandoned legal-status Critical Current

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    • 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
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
    • F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
    • 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
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the present invention relates to a blow-by gas oil separator that includes multiple cyclones capable of separating out oil mist contained in blow-by gas.
  • blow-by gas that has leaked from the combustion chamber into the crankcase is returned to the air intake passage and caused to undergo combustion again in the combustion chamber.
  • Blow-by gas contains oil mist, which is formed by engine oil or the like that has been dispersed as microscopic particles, and therefore such oil mist needs to be separated from the blow-by gas before being caused to undergo combustion in the combustion chamber.
  • blow-by gas oil separator is used in such an application.
  • a conventional blow-by gas oil separator disclosed in Patent Document 1 includes: multiple cyclones that are supplied with blow-by gas of an internal combustion engine, each including, in a lower portion, an oil discharge opening that separates out and discharges oil mist contained in the blow-by gas, and including, in an upper portion, a blow-by gas outlet that allows the blow-by gas to flow out after oil separation; an oil receiving portion that opposes the oil discharge openings of the cyclones; a blow-by gas circulation portion that is in communication with the blow-by gas outlets of the cyclones, and is connected to the air intake passage of the internal combustion engine via a circulation valve; and an oil receiving chamber formed by the cyclones and the oil receiving portion.
  • blow-by gas Due to negative pressure generated in the air intake passage of the internal combustion engine, blow-by gas is suctioned in and supplied to the cyclones, and then after oil separation, the blow-by gas is suctioned into the blow-by gas circulation portion through the blow-by gas outlets.
  • the oil that was separated out by the cyclones is discharged to the oil receiving portion through the oil discharge openings due to its own weight.
  • the oil discharge openings provided in the lower portions of the cyclones and the blow-by gas outlets provided in the upper portions of the cyclones are in communication with each other via the interiors of the cyclones. Accordingly, negative pressure generated in the air intake passage is introduced to the oil discharge openings as well.
  • the magnitude of the negative pressure introduced to an oil discharge opening increases the closer the blow-by gas outlet in communication with that oil discharge opening is located to the circulation valve.
  • Patent Document 1 JP 2009-221857A
  • the present invention was achieved in light of the above-described circumstances, and an object thereof is to provide a blow-by gas oil separator that can prevent oil that was discharged into the oil receiving chamber from flowing backward into a cyclone.
  • a characteristic configuration of a blow-by gas oil separator lies in that the blow-by gas oil separator includes: a plurality of cyclones to which blow-by gas of an internal combustion engine is supplied, each of the cyclones including, in a lower portion, an oil discharge opening that separates out and discharges oil mist contained in the blow-by gas, and including, in an upper portion, a blow-by gas outlet that allows the blow-by gas to flow out after oil separation; an oil receiving portion that opposes the oil discharge openings of the plurality of cyclones; a blow-by gas circulation portion that is in communication with the blow-by gas outlets of the plurality of cyclones, and is connected to an air intake passage of the internal combustion engine via a circulation valve; and partition walls that are provided in an oil receiving chamber formed by the plurality of cyclones and the oil receiving portion, and separate adjacent oil discharge openings from each other.
  • the partition walls that separate adjacent oil discharge openings from each other are provided on the oil receiving chamber.
  • oil in the form of droplets or the like that was discharged from the oil discharge openings into the oil receiving portion can be prevented from flowing backward into a cyclone through a different oil discharge opening.
  • Another characteristic configuration of one aspect of the present invention lies in that the partition walls are provided so as to be integrated on a cyclone side, and a gap is formed between lower ends of the partition walls and the oil receiving portion.
  • the relative positions of the partition walls and the cyclones can be easily determined with favorable precision.
  • blow-by gas circulation portion includes an inner bottom portion that is lower with increasing distance from the circulation valve.
  • blow-by gas circulation portion has an inner bottom portion in which the blow-by gas outlets are each formed, and the inner bottom portion is provided with an oil channel along which oil can flow so as to move away from the circulation valve while avoiding the blow-by gas outlets, and a communication channel that can put a terminal side of the oil channel in communication with the oil receiving chamber.
  • blow-by gas circulation portion has the inner bottom portion in which the blow-by gas outlets are each formed, as in this configuration, there is a risk that oil in the process of flowing along the oil channel flows from a blow-by gas outlet into a cyclone, thus reducing the oil separation capability.
  • the blow-by gas oil separator according to this configuration is provided with the oil channel along which oil suctioned into the blow-by gas circulation portion can flow while avoiding the blow-by gas outlets, and the communication channel that can put the terminal side of the oil channel into communication with the oil receiving chamber.
  • oil in the process of flowing along the oil channel can be caused to flow from the communication channel into the oil receiving chamber, without flowing into cyclones, and it is possible to prevent a reduction in the oil separation capability of the cyclones.
  • Another characteristic configuration of one aspect of the present invention lies in that the inner bottom portion is provided with a projection portion that separates one end side of the oil channel in a width direction from a blow-by gas outlet side.
  • the spread of the oil in the channel width direction can be restricted by the projection portion, and oil in the processing of flowing along the oil channel toward the communication channel can be reliably prevented from flowing into cyclones.
  • Another characteristic configuration of one aspect of the present invention lies in that a receding portion is formed at a terminal side of the oil channel, the receding portion is deeper than a channel portion on an upstream side of the terminal side of the oil channel, and the communication channel is open at a bottom portion of the receding portion.
  • the receding portion is deeper than the channel portion on the upstream side thereof, and therefore there is little risk that oil that has accumulated in the receding portion is suctioned toward the circulation valve.
  • FIG. 1 is a side view of an oil separator.
  • FIG. 2 is a plan view of the oil separator.
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 .
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 seen in a direction indicated by arrows.
  • FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3 seen in a direction indicated by arrows.
  • FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 3 seen in a direction indicated by arrows.
  • FIG. 7 is a vertical cross-sectional diagram showing an oil separator according to a second embodiment.
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7 seen in a direction indicated by arrows.
  • FIG. 9 is a vertical cross-sectional diagram showing an oil separator according to a third embodiment.
  • FIG. 10 is a vertical cross-sectional diagram showing an oil separator according to a fourth embodiment.
  • FIG. 11 is a vertical cross-sectional diagram showing an oil separator according to a fifth embodiment.
  • FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11 seen in a direction indicated by arrows.
  • FIGS. 1 to 6 show a cyclone-type blow-by gas oil separator according to the present invention, which is for mounting inside a cylinder head cover (not shown) or the like of an internal combustion engine such as an engine for an automobile.
  • the blow-by gas is returned to the air intake passage of the internal combustion engine via a circulation valve (not shown) such as a PCV valve (Positive Crankcase Ventilation valve), and then subjected to combustion again in the combustion chamber.
  • a circulation valve such as a PCV valve (Positive Crankcase Ventilation valve)
  • the oil separator A includes, inside a resin housing 1 , multiple (four in the present embodiment) cyclones B to which blow-by gas is supplied, an oil receiving chamber 2 that receives oil separated out by the cyclones B, and a blow-by gas circulation chamber (blow-by gas circulation portion) 3 that is connected to the air intake passage of the internal combustion engine via the circulation valve.
  • the cyclones B each include, in a lower portion, an oil discharge opening 4 that separates out oil mist contained in blow-by gas and discharges the oil mist using the weight thereof, and include, in an upper portion, a blow-by gas outlet 5 that allows the blow-by gas to flow out after oil separation.
  • the oil receiving chamber 2 is formed between the four cyclones B and an oil receiving portion 6 that opposes the oil discharge openings 4 , and is configured so as to collect oil that is discharged from the oil discharge openings 4 , and return the oil to the inside of the engine through a drain pipe 7 .
  • the blow-by gas outlets 5 are each in communication with the blow-by gas circulation chamber 3 , and are configured so as to collect the blow-by gas flowing in through the blow-by gas outlets 5 after oil separation, and return the blow-by gas from a gas discharge pipe 8 to the air intake passage of the internal combustion engine via the circulation valve.
  • the housing 1 is assembled by fitting a lower case 1 a and an intermediate case 1 b to an upper case 1 c and a lid case 1 d in the vertical direction.
  • the space formed between the lower case 1 a and the intermediate case 1 b is partitioned into the oil receiving chamber 2 and a gas introduction chamber 9 into which blow-by gas inside the cylinder head cover is introduced through a gas introducing opening 9 a.
  • a straightening chamber 10 which straightens the flow of blow-by gas before flowing into the cyclones B, and a blow-by gas inflow passage 10 a , which allows blow-by gas to flow from the gas introduction chamber 9 into the straightening chamber 10 , are formed between the intermediate case 1 b and the upper case 1 c.
  • the space between the upper case 1 c and the lid case 1 d forms the blow-by gas circulation chamber 3 as shown in FIG. 4 .
  • the drain pipe 7 by which oil collected in the oil receiving chamber 2 is returned to the inside of the engine, is connected to the lower case 1 a.
  • the oil receiving portion 6 is formed by the bottom plate portion of the lower case 1 a , and is inclined such that oil flows toward the drain pipe 7 due to its own weight.
  • an oil receiving chamber upper wall 2 a which separates the straightening chamber 10 and the oil receiving chamber 2 in the vertical direction, and the four cyclones B that penetrate the oil receiving chamber upper wall 2 a in the vertical direction are formed so as to be integrated in the intermediate case 1 b.
  • the cyclones B each include a conical tube wall portion 12 whose inner diameter decreases as it extends downward, and a circular tube wall portion 11 whose inner diameter is constant and that extends upward from the upper edge of the conical tube wall portion 12 , and the conical tube wall portion 12 and the circular tube wall portion 11 are integrated about a tube axis X that extends in the vertical direction.
  • the four cyclones B are arranged side-by-side in a straight line with the positions of their tube axes X at equal intervals in a plan view, and are aligned such that the circular tube wall portions 11 are connected to each other in an integrated manner.
  • the circular tube wall portions 11 are provided so as to protrude from the oil receiving chamber upper wall 2 a into the straightening chamber 10 , and a blow-by gas supply opening 11 a, which allows blow-by gas in the straightening chamber 10 to flow in from a direction tangential to the inner side of the circular tube wall portion 11 , is formed as a slit in each of the circular tube wall portions 11 .
  • the conical tube wall portions 12 are provided so as to protrude from the oil receiving chamber upper wall 2 a into the oil receiving chamber 2 , and the lower end openings of the conical tube wall portions 12 function as the oil discharge openings 4 .
  • the upper case 1 c includes a distribution chamber lower wall 3 a that separates the blow-by gas circulation chamber 3 and the straightening chamber 10 in the vertical direction, and the blow-by gas outlets 5 are formed in the distribution chamber lower wall 3 a.
  • the blow-by gas circulation chamber 3 has an inner bottom portion 16 in which the blow-by gas outlets 5 are each formed.
  • the upper end portions of the circular tube wall portions 11 are fitted into and fixed to the lower surface side of the distribution chamber lower wall 3 a.
  • Circular tube portions 13 that form the blow-by gas outlets 5 are formed so as to be integrated with the lower surface side of the distribution chamber lower wall 3 a.
  • the circular tube portions 13 are provided so as to coaxially enter the corresponding cyclones B with a gap in the diameter direction from the inner sides of the circular tube wall portions 11 .
  • the gas discharge pipe 8 which is connected to the air intake passage of the internal combustion engine via the circulation valve, is provided in the lid case 1 d.
  • the gas discharge pipe 8 is provided so as to be in communication with the interior of the blow-by gas circulation chamber 3 on one end side in the alignment direction of the blow-by gas outlets 5 (on the side distant from the blow-by gas inflow passage 10 a ).
  • Blow-by gas inside the cylinder head cover is introduced into the gas introduction chamber 9 by being suctioned through the gas introducing opening 9 a due to negative pressure generated in the air intake passage in accompaniment with an air intake operation of the internal combustion engine.
  • the blow-by gas introduced into the gas introduction chamber 9 flows into the straightening chamber 10 through the blow-by gas inflow passage 10 a, and then flows from the blow-by gas supply openings 11 a into the circular tube wall portions 11 .
  • the oil separated out in the form of droplets by the cyclones B then falls through the oil discharge openings 4 into the oil receiving chamber 2 and is collected in the oil receiving portion 6 , and is then returned to the inside of the engine through the drain pipe 7 .
  • the blow-by gas is suctioned through the circular tube portions 13 into the blow-by gas circulation chamber 3 via the blow-by gas outlets 5 , and then flows back through the gas discharge pipe 8 to the combustion chamber via the air intake passage.
  • the oil discharge openings 4 provided in the cyclones B are in communication with the blow-by gas outlets 5 inside the cyclones B. For this reason, negative pressure generated in the air intake passage acts on the oil discharge openings 4 as well, and there is a risk that droplets of oil discharged into the oil receiving chamber 2 are suctioned through the oil discharge openings 4 , travel inside the cyclones B, and flow backward into the blow-by gas circulation chamber 3 .
  • the magnitude of the negative pressure acting on an oil discharge opening 4 of a cyclone B increases the closer the blow-by gas outlet 5 in communication with the oil discharge opening 4 is arranged to the entrance of the gas discharge pipe 8 (the downstream side in the direction of the flow of blow-by gas toward the air intake passage).
  • droplets of oil discharged from one oil discharge opening 4 into the oil receiving chamber 2 need to be prevented from being suctioned through an oil discharge opening 4 different from that one oil discharge opening 4 , that is to say, through the oil discharge opening 4 of a cyclone B that is arranged farther downstream, in the direction of the flow of blow-by gas toward the gas discharge pipe 8 , than the cyclone B that includes that one oil discharge opening 4 .
  • band plate-shaped partition walls 14 are provided in order to, by separating adjacent oil discharge openings 4 from each other, prevent the suctioning of droplets of oil through oil discharge openings 4 on which high negative pressure easily acts.
  • the partition walls 14 are provided on the cyclone B side, that is to say, so as to be integrated with the intermediate case 1 b , between respective pairs of adjacent conical tube wall portions 12 , and extend in a straight line so as to traverse the interior of the oil receiving chamber 2 in the direction orthogonal to the alignment direction of the cyclones B.
  • a slit-shaped gap 15 that extends along the oil receiving surface of the oil receiving portion 6 is formed between the lower ends of the partition walls 14 and the oil receiving portion 6 .
  • oil that has been discharged to the oil receiving chamber 2 is suctioned through an oil discharge opening 4 and flows backward into a cyclone B, that oil flows into the blow-by gas circulation chamber 3 along with blow-by gas and accumulates.
  • the blow-by gas circulation chamber 3 is provided in an orientation in which the upper surface of the distribution chamber lower wall 3 a, which forms the inner bottom portion 16 of the blow-by gas circulation chamber 3 , is inclined relative to the horizontal direction so as to become lower with increasing distance from the circulation valve, that is to say with increasing distance from the entrance of the gas discharge pipe 8 , such that oil that has accumulated therein can be discharged to the oil receiving chamber 2 .
  • the inner bottom portion 16 is provided with an oil channel 17 along which oil can flow due to its own weight so as to move away from the circulation valve, that is to say move away from the entrance of the gas discharge pipe 8 , while avoiding the blow-by gas outlets 5 .
  • a communication channel 18 which can put the oil channel 17 into communication with the oil receiving chamber 2 , is open at the terminal side of the oil channel 17 .
  • the communication channel 18 is formed by one of the circular tube portions 13 .
  • the oil channel 17 is formed as a channel that is sandwiched between a side wall portion 19 of the upper case 1 c that surrounds the blow-by gas circulation chamber 3 and a projection portion 20 that projects from the inner bottom portion 16 and extends along the alignment direction of the blow-by gas outlets 5 at a position separated from them.
  • the projection portion 20 is provided so as to extend in a continuous manner from a position in the vicinity of and below the entrance of the gas discharge pipe 8 to the blow-by gas outlet 5 located the farthest from the entrance of the gas discharge pipe 8 , and separates one end side of the oil channel 17 in the width direction from the blow-by gas outlet 5 side.
  • the communication channel 18 is formed by the circular tube portion 13 that is in communication with the blow-by gas outlet 5 at the farthest position from the circulation valve, that is to say the farthest position from the entrance of the gas discharge pipe 8 .
  • oil that has flowed from the oil channel 17 into the communication channel 18 travels through the interior of the cyclone B and is discharged from the oil discharge opening 4 into the oil receiving chamber 2 .
  • FIGS. 7 and 8 show another embodiment of the present invention.
  • tube-shaped partition walls 14 are provided instead of the band plate-shaped partition walls 14 described in the first embodiment.
  • the tube-shaped partition walls 14 extend from the lower end sides of the circular tube wall portions 11 that constitute the cyclones B, in the shape of cylinders that surround the conical tube wall portions 12 , and separate adjacent oil discharge openings 4 from each other.
  • a gap 15 is formed between the lower ends of the tube-shaped partition walls 14 and the oil receiving portion 6 , so as to separate the lower ends of the tube-shaped partition walls 14 from the oil receiving portion 6 .
  • FIG. 9 shows another embodiment of the present invention.
  • ring-shaped partition walls 14 are provided instead of the tube-shaped partition walls 14 described in the second embodiment.
  • the ring-shaped partition walls 14 are obtained by extending the lower ends of the conical tube wall portions 12 that constitute the cyclones B toward the oil receiving portion 6 , and separate adjacent oil discharge openings 4 from each other.
  • FIG. 10 shows another embodiment of the present invention.
  • band plate-shaped partition walls 14 are provided instead of the partition walls 14 described in the first embodiment that are provided so as to be integrated with the intermediate case 1 b .
  • the band plate-shaped partition walls 14 are provided so as to be integrated with the lower case 1 a that forms the oil receiving chamber 2 , and separate adjacent oil discharge openings 4 from each other.
  • the partition walls 14 are provided between respective pairs of adjacent conical tube wall portions 12 , and extend in a straight line so as to traverse the interior of the oil receiving chamber 2 in the direction orthogonal to the alignment direction of the cyclones B.
  • Arc-shaped through-holes 14 a are formed in portions of the partition walls 14 that rise up from the oil receiving portion 6 , so as to not hinder the flow of oil toward the drain pipe 7 .
  • FIGS. 11 and 12 show another embodiment of the present invention.
  • a circular receding portion 21 is formed at the terminal side of the oil channel 17 illustrated in the first embodiment, and is deeper than the channel portion on the upstream side of the terminal side of the oil channel 17 .
  • the receding portion 21 is formed so as to be coaxial with the circular tube portion 13 that is in communication with the blow-by gas outlet 5 at the farthest position from the circulation valve, that is to say the farthest position from the entrance of the gas discharge pipe 8 , and the blow-by gas outlet 5 that forms the communication channel 18 is formed in the bottom portion of the receding portion 21 .
  • the oil separator according to the present invention may be provided outside of the cylinder head cover.
  • the oil separator according to the present invention can be mounted in various types of internal combustion engines other than an engine for an automobile.
  • blow-by gas circulation portion blow-by gas circulation chamber

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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)
US15/112,919 2014-01-24 2014-12-22 Blow-by gas oil separator Abandoned US20160376950A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2014-011387 2014-01-24
JP2014011387A JP2015137631A (ja) 2014-01-24 2014-01-24 ブローバイガス用オイルセパレータ
PCT/JP2014/083946 WO2015111345A1 (ja) 2014-01-24 2014-12-22 ブローバイガス用オイルセパレータ

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JP (1) JP2015137631A (enExample)
CN (1) CN206175024U (enExample)
WO (1) WO2015111345A1 (enExample)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
US20180112567A1 (en) * 2016-10-26 2018-04-26 GM Global Technology Operations LLC Integrated oil separator assembly for crankcase ventillation
US20190345855A1 (en) * 2018-05-14 2019-11-14 Kubota Corporation Engine that includes blow-by-gas returning system
CN110693391A (zh) * 2019-11-27 2020-01-17 珠海格力电器股份有限公司 吸尘器、旋风分离机构及安装支架
US10823019B2 (en) * 2018-07-31 2020-11-03 Ford Global Technologies, Llc Ducted positive crankcase ventilation plenum
US20220184641A1 (en) * 2020-12-10 2022-06-16 Ge Avio S.R.L. Air/oil separator apparatus and method

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JP6908374B2 (ja) * 2016-12-09 2021-07-28 株式会社Roki オイルセパレータ
JP6881019B2 (ja) * 2017-05-19 2021-06-02 スズキ株式会社 内燃機関のブローバイガス処理装置
CN112774378A (zh) * 2020-12-22 2021-05-11 中国船舶重工集团公司第七0三研究所 一种带有旋风分离的燃气轮机油气分离器
CN113027566B (zh) * 2021-05-07 2024-12-27 浙江钱江摩托股份有限公司 一种发动机空滤器中的油气分离结构

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US6626163B1 (en) * 1999-05-06 2003-09-30 Walter Hengst Gmbh & Co. Kg Oil separator for de-oiling crankcase ventilation gases of an internal combustion engine
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180112567A1 (en) * 2016-10-26 2018-04-26 GM Global Technology Operations LLC Integrated oil separator assembly for crankcase ventillation
US10151225B2 (en) * 2016-10-26 2018-12-11 GM Global Technology Operations LLC Integrated oil separator assembly for crankcase ventilation
US20190345855A1 (en) * 2018-05-14 2019-11-14 Kubota Corporation Engine that includes blow-by-gas returning system
US10982576B2 (en) * 2018-05-14 2021-04-20 Kubota Corporation Engine that includes blow-by-gas returning system
US10823019B2 (en) * 2018-07-31 2020-11-03 Ford Global Technologies, Llc Ducted positive crankcase ventilation plenum
CN110693391A (zh) * 2019-11-27 2020-01-17 珠海格力电器股份有限公司 吸尘器、旋风分离机构及安装支架
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