CN101985891B - Oil-gas separation structure for gasoline engine - Google Patents

Oil-gas separation structure for gasoline engine Download PDF

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Publication number
CN101985891B
CN101985891B CN 201010550745 CN201010550745A CN101985891B CN 101985891 B CN101985891 B CN 101985891B CN 201010550745 CN201010550745 CN 201010550745 CN 201010550745 A CN201010550745 A CN 201010550745A CN 101985891 B CN101985891 B CN 101985891B
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China
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cavity
cylinder head
oil
breathing
gasoline engine
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CN 201010550745
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CN101985891A (en
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鲁卡
何飞
谢育明
陈宏波
孙玲玲
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Loncin General Dynamics Co Ltd
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Loncin General Dynamics Co Ltd
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Abstract

The invention provides an oil-gas separation structure for a gasoline engine. In the structure, a breathing plate is arranged in a breathing channel between the inner cavity of an air cylinder head cover and the inner cavity of a crank case; the air cylinder head cover is provided with an exhaust port communicated with the air cylinder head cover; a first oil return hole communicated to the crank case is arranged at the lowest position of the inner cavity of the air cylinder head cover; the gasoline engine is provided with a breathing cavity with an air inlet and an air outlet; a labyrinth groove is arranged in the breathing cavity; the air inlet of the breathing cavity is communicated with the exhaust port on the air cylinder head cover through a first ventilating pipe; the air outlet of the breathing cavity is communicated with an inlet pipe of a carburetor through a second ventilating pipe; and a second oil return hole is arranged at the lowest position of the breathing cavity. The oil-gas separation structure ensures that oil and gas discharged from the crank case of the gasoline engine can be sufficiently separated and reclaimed, is conducive to reduction of engine oil consumption of the gasoline engine, and leads less engine oil content in the waste gas entering the carburetor so as to improve combustion and reduce accumulated carbon of a combustion chamber.

Description

The gasoline engine oil gas separation structure
Technical field
The present invention relates to petrol engine, especially the gas oil separation structure of petrol engine.
Background technique
In petrol engine when work,, always some inflammable mixture and waste gas are scurried and will be made machine oil thinning after gasoline vapour in the crankcase condenses in piston ring is scurried crankcase, performance depreciation.Waste gas contains water vapour and sulfur dioxide, and steam coagulation forms foam in machine oil, destroys engine oil supplying, and this phenomenon is particularly serious in the winter time; Sulfur dioxide is met water and is generated sulphurous acid, and sulphurous acid runs into airborne oxygen and generates sulfuric acid, and the appearance of these acidic materials not only makes machine oil rotten, and part is corroded.Because inflammable mixture and waste gas are scurried in the crankcase, the interior pressure of crankcase will increase, and machine oil can ooze out and runs off from crank shaft oil seal, crankcase liner etc., and the machine oil steam that is lost in the atmosphere can pollute atmosphere.For avoiding or alleviating the harm that above-mentioned phenomenon causes, crankcase bleeder is housed all generally on petrol engine.
Inflammable mixture and waste gas in the crankcase can not directly enter atmosphere by crankcase bleeder; Usually to utilize the interior gas of pumping action suction crankcase of petrol engine intake system; And in the pipeline that connects crankcase and suction tude, deaerator is set, and separate the oil that in crankcase, aspirates, gas, make liquid oil flow back to crankcase; The aspiration of gaseous state is gone into suction tude, can reduce the consumption of machine oil like this.
Existing known petrol engine normally adopts single breathing sheet or leaf valve formula cyclone separator arrangement, and the gas mixture that comes out in the crankcase only passes through first separation, and the separating effect of oil gas is bad, and oil consumption is bigger than normal.
Summary of the invention
It is more abundant to the purpose of this invention is to provide a kind of Oil-gas Separation that makes, thereby reduces the gasoline engine oil gas separation structure of oil consumption.
For realizing above-mentioned technical purpose; The invention provides a kind of gasoline engine oil gas separation structure; In the respiration channel between cylinder head cover cavity and the crankcase intracavity, be provided with the breathing sheet; Cylinder head covers and is provided with the relief opening that is communicated with the cylinder head cover cavity, and the lowest part of cylinder head cover cavity is provided with first spill port that leads to crankcase intracavity, on petrol engine, also is provided with a respiratory cavity with suction port and air outlet; Be provided with maze trough in the respiratory cavity; The suction port of respiratory cavity is connected through the relief opening that first breathing pipe and cylinder head cover, and the air outlet of respiratory cavity is communicated with the suction tude of Carburetor through second breathing pipe, and the lowest part of respiratory cavity is provided with second spill port.
Breathing sheet in the cylinder skull opens and closes with the size variation of the oil vapor pressure in the crankcase; When the oil vapor pressure in the crankcase is big; The breathing sheet is opened, and oil vapor gets into the cylinder head cover cavity and carries out the Oil-gas Separation first time, and the machine oil that cools and isolates flow back in the crankcase body through first spill port; The oily vapours of uncolled separation continues to get in the respiratory cavity through first breathing pipe; Carry out the Oil-gas Separation second time through the maze trough in the respiratory cavity, the machine oil through refrigerated separation in the respiratory cavity flows back in the crankcase body through second spill port, and uncolled gas separated gets into the suction tude of Carburetor through second breathing pipe; Get into again in the Carburetor and mix, enter into the firing chamber at last and burn with fuel oil and air.In this whole process, because oil vapor has passed through the two-stage separation, Oil-gas Separation is more abundant, thorough; Can obviously reduce the oil consumption of petrol engine, simultaneously, also make in the waste gas that reclaim to get into Carburetor machine oil content still less; Improve burning, reduce the carbon distribution of firing chamber.
Further; The cylinder skull is combined by inner cap and enclosing cover, is connected with tegillum at the ventilating hole place of inner cap towards a side of enclosing cover, and the top of tegillum is provided with the puff prot more young than the ventilation of inner cap; Movable being positioned in the receiving cavity of sheet breathed for breathing the receiving cavity of sheet in the below of tegillum.When the oil vapor pressure size in the crankcase changed, string was moving up and down under the impact of air-flow for the breathing sheet in the receiving cavity, and oil vapor takes this to get into the cylinder head cover cavity, in the cylinder head cover cavity, carries out first order Oil-gas Separation.
Further, respiratory cavity is arranged on the crankcase body, and Fig. 1 is the schematic representation of petrol engine according to the invention.
Fig. 2 is that the F of Fig. 1 is to view.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 2.
.1. cylinder head cover cavity among the figure; 2. crankcase intracavity; 3. breathing sheet; 4. relief opening; 5. suction port; 6. air outlet; 7. respiratory cavity; 8. maze trough; 9. first breathing pipe; 10. second breathing pipe; 11. the suction tude of Carburetor; 12. first spill port; 13. second spill port; 14. inner cap; 15. enclosing cover; 16. tegillum; 17. ventilating hole; 18. puff prot; 19. sealing plate; 20. bent axle; 21. crankcase cover; 22. cylinder head air guide sleeve; 23. Carburetor; 24. be spark coil; 25. cylinder head.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Extremely shown in Figure 4 like Fig. 1; A kind of concrete gasoline engine oil gas separation structure of the present invention; In the respiration channel between cylinder head cover cavity 1 and the crankcase intracavity 2, be provided with and breathe sheet 3; Cylinder head covers and is provided with the relief opening 4 that is communicated with cylinder head cover cavity 1, and the lowest part of cylinder head cover cavity 1 is provided with first spill port 12 that leads to crankcase intracavity 2, on petrol engine, also is provided with a respiratory cavity 7 with suction port 5 and air outlet 6; Respiratory cavity is provided with maze trough 8 for 7 li; The suction port 5 of respiratory cavity 7 is connected through the relief opening 4 that first breathing pipe 9 and cylinder head cover, and the air outlet 6 of respiratory cavity 7 is communicated with the suction tude 11 of Carburetor through second breathing pipe 10, and the lowest part of respiratory cavity 7 is provided with second spill port 13.20 is bent axle among Fig. 1, and 21 is crankcase cover, and 22 is the cylinder head air guide sleeve, and 23 is Carburetor, and 24 is spark coil.25 is cylinder head among Fig. 2.Except that the arrow of analysing and observe symbol, all the other arrows are represented airflow direction among Fig. 1 to Fig. 4.
Breathing sheet 3 in the cylinder skull opens and closes with the size variation of the oil vapor pressure in the crankcase; When the oil vapor pressure in the crankcase is big; Breathe sheet 3 and open, oil vapor gets into cylinder head cover cavity 1 and carries out the Oil-gas Separation first time, and the machine oil that cools and isolates flow back in the crankcase body through first spill port 12; The oily vapours of uncolled separation continues to get into 7 li of respiratory cavitys through first breathing pipe 9; Maze trough through in the respiratory cavity 7 carries out the Oil-gas Separation second time, and the machine oil through refrigerated separation in the respiratory cavity 7 flows back in the crankcase body through second spill port 13, the suction tude 11 that uncolled gas separated gets into Carburetor through second breathing pipe 10; Get into again in the Carburetor and mix, enter into the firing chamber at last and burn with fuel oil and air.
Referring to Fig. 3; The cylinder skull is combined by inner cap 14 and enclosing cover 15; Ventilating hole place at inner cap 14 is connected with tegillum 16 towards a side of enclosing cover; The top of tegillum 16 is provided with the puff prot 18 littler than the ventilating hole of inner cap 14 17, and sheet 3 movable being positioned in the receiving cavity are breathed for breathing the receiving cavity of sheet 3 in the below of tegillum 16.When the size of the oil vapor pressure in the crankcase changed, string was moving up and down under the impact of air-flow for the breathing sheet 3 in the receiving cavity, and oil vapor takes this to get into cylinder head cover cavity 1, carries out first order Oil-gas Separation for 1 li at the cylinder head cover cavity.
Referring to Fig. 2, Fig. 4, respiratory cavity 7 is arranged on the crankcase body, and respiratory cavity 7 is made up of groove on the crankcase body and the sealing plate 19 that covers on groove, and maze trough is arranged on the bottom of groove.The temperature of crankcase body is relatively low, helps the refrigerated separation of oil gas, process earlier during manufacturing the band maze trough groove, again with sealing plate 19 fixed covers on groove.
Respiratory cavity 7 is positioned at directly over the vertical gasoline engine crank casing and on the extended boss, is convenient to the processing and the assembling of respiratory cavity 7 like this, boss be positioned at the gasoline engine crank casing directly over, also be more convenient for making isolated machine oil to reflux in the crankcase body.

Claims (4)

1. gasoline engine oil gas separation structure; In the respiration channel between cylinder head cover cavity and the crankcase intracavity, be provided with the breathing sheet; Cylinder head covers and is provided with the relief opening that is communicated with the cylinder head cover cavity, and the lowest part of cylinder head cover cavity is provided with first spill port that leads to crankcase intracavity, it is characterized in that: on petrol engine, also be provided with a respiratory cavity with suction port and air outlet; Be provided with maze trough in the respiratory cavity; The suction port of respiratory cavity is connected through the relief opening that first breathing pipe and cylinder head cover, and the air outlet of respiratory cavity is communicated with the suction tude of Carburetor through second breathing pipe, and the lowest part of respiratory cavity is provided with second spill port.
2. gasoline engine oil gas separation structure as claimed in claim 1; It is characterized in that: said cylinder skull is combined by inner cap and enclosing cover; Ventilating hole place at inner cap is connected with tegillum towards a side of enclosing cover; The top of tegillum is provided with the puff prot more young than the ventilation of inner cap, and movable being positioned in the receiving cavity of sheet breathed for breathing the receiving cavity of sheet in the below of tegillum.
3. gasoline engine oil gas separation structure as claimed in claim 1 is characterized in that: said respiratory cavity is arranged on the crankcase body, and respiratory cavity is constituted by groove on the crankcase body and the sealing plate that covers on groove, and maze trough is arranged on the bottom of groove.
4. gasoline engine oil gas separation structure as claimed in claim 3 is characterized in that: said respiratory cavity is positioned at directly over the vertical gasoline engine crank casing on the extended boss.
CN 201010550745 2010-11-19 2010-11-19 Oil-gas separation structure for gasoline engine Active CN101985891B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010550745 CN101985891B (en) 2010-11-19 2010-11-19 Oil-gas separation structure for gasoline engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010550745 CN101985891B (en) 2010-11-19 2010-11-19 Oil-gas separation structure for gasoline engine

Publications (2)

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CN101985891A CN101985891A (en) 2011-03-16
CN101985891B true CN101985891B (en) 2012-07-04

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182531A (en) * 2011-04-28 2011-09-14 江苏林海动力机械集团公司 Respirator circulating system structure for oil and gas separation of universal gasoline engine
CN106089485B (en) * 2016-06-28 2018-09-21 重庆科杰实业有限责任公司 Engine air cylinder cap assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744535B1 (en) * 1995-05-22 1999-01-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Internal combustion engine with oil separator compartment
DE102005025864A1 (en) * 2005-06-06 2006-12-07 Robert Bosch Gmbh Separator for removing liquids from gases in IC engine crankcases comprises cyclone with outlet which is closed by movable plate whose edges fit against valve seat and have peripheral rib which fits into groove in it, forming labyrinth seal
AT501008B1 (en) * 2006-02-02 2007-12-15 Avl List Gmbh LIQUID-COOLED INTERNAL COMBUSTION ENGINE
CN201358829Y (en) * 2009-03-09 2009-12-09 盐城兴动机械有限公司 Breathing apparatus of crankcase of internal combustion engine
CN201581956U (en) * 2009-11-30 2010-09-15 重庆润通动力有限公司 Oil-gas separator of general gasoline engine crankcase box
CN202012382U (en) * 2010-11-19 2011-10-19 隆鑫通用动力股份有限公司 Double layer oil gas separating structure for general gasoline engine

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