CN201232577Y - Oil gas separating structure for exhaust gas of engine crankcase - Google Patents
Oil gas separating structure for exhaust gas of engine crankcase Download PDFInfo
- Publication number
- CN201232577Y CN201232577Y CNU2008200984585U CN200820098458U CN201232577Y CN 201232577 Y CN201232577 Y CN 201232577Y CN U2008200984585 U CNU2008200984585 U CN U2008200984585U CN 200820098458 U CN200820098458 U CN 200820098458U CN 201232577 Y CN201232577 Y CN 201232577Y
- Authority
- CN
- China
- Prior art keywords
- cavity
- waste gas
- muscle
- downstream
- crankcase
- 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.)
- Expired - Lifetime
Links
- 239000002912 waste gas Substances 0.000 claims abstract description 76
- 239000007789 gas Substances 0.000 claims abstract description 38
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 210000003205 muscle Anatomy 0.000 claims description 64
- 238000005452 bending Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract 5
- 230000002787 reinforcement Effects 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 206010033307 Overweight Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 235000020825 overweight Nutrition 0.000 description 1
Images
Abstract
The utility model discloses a gas-oil separation structure for the waste gas of an engine crankshaft case. A wall at one side of the composite case of a left crankshaft case and a right crankshaft case is respectively provided with a corresponding molding cavity. After the left crankshaft case and the right crankshaft case are combined, a waste gas separation cavity is formed. The molding cavity of each crankshaft case comprises an upstream cavity, a downstream cavity and a narrow channel communicating the upper parts of the upstream cavity and the downstream cavity breadthwise. The upstream cavity of one molding cavity is provided with a waste gas inlet and the downstream cavity is provided with a waste gas outlet and an oil return hole. A separation bar obstructing the straight running of air stream is arranged inside the upstream cavity and the downstream cavity of the two molding cavities. The separation bar in the upstream cavity and the downstream cavity extends downwards from the upper wall of the cavity with a blow vent left between the reinforcement and a lower wall. The separation reinforcement space obstructing the straight running of the air stream in the molding cavity of the left crankshaft case and the right crankshaft case corresponds to each other. With the advantages of compact structure and small space usage, the utility model realizes the oil-gas separation of the waste gas of the crankshaft case well and prevents the oil spout phenomenon when the engine works with high load in addition to reducing the weight of the crankshaft case and decreasing the cost of the crankshaft case.
Description
Technical field
The utility model relates to the crankcase of motorcycle engine, particularly a kind of gas oil separation structure of waste gas of crankshaft box of motorcycle engine.
Background technique
During motorcycle engine work, high-temp waste gas in the cylinder can be scurried in the crankcase, cause the gas in the crankcase to expand, air pressure increases, and form mist of oil shape waste gas with the lubricant oil of evaporation, need waste gas is in time discharged to reduce the air pressure in the crankcase, still the direct discharging of waste gas can be caused pollution again environment.At this situation, normally before the Waste gas outlet of crankcase, be provided with the chamber, labyrinth waste gas is carried out the Oil-gas Separation filtration, directly discharge and befouling environment with waste gas to prevent a large amount of oil molecules.As shown in Figure 3, the waste gas that is provided with in the present four-stroke crankshaft box of motorcycle engine separates the labyrinth cavity configuration, usually be located at the below of the top mould assembling face of left and right sides crankcase, the direct upper punch of the waste gas of thermal expansion between the crankcase of the left and right sides, hand-hole by bottom, chamber, labyrinth and sidepiece enters the chamber, labyrinth, be provided with many staggered horizontal muscles in the chamber, labyrinth and form the labyrinth, the breach that dislocation laterally is set respectively on the muscle can not straightly pass through the waste gas of thermal expansion, after in the labyrinth, being subjected to certain obstruction delay, breach from dislocation passes through again, elaioleucite in the waste gas is fallen, and form oil droplet, be back to the machine oil pond of crankcase bottom from the hand-hole of bottom, chamber, labyrinth.Because it is comparatively complicated that existing Oil-gas Separation is filtered labyrinth structure, occupation space is bigger, especially the position that is provided with, labyrinth, the layout of the breach of its horizontal labyrinth muscle and dislocation etc. is all owed rationality, there is certain defective, " oil spout " phenomenon still appears in motor that discharge capacity is bigger easily when high loaded process, the lubricant mist that produces in the crankcase is scurried outward with waste gas.Simultaneously,, cause the volume of crankcase bigger again, be unfavorable for reducing the motor volume, alleviate the design of engine weight because existing waste gas separating and filtering labyrinth takes up room greatlyyer.
The model utility content
The purpose of this utility model is at the deficiencies in the prior art, a kind of gas oil separation structure of waste gas of engine crankcase is provided, its compact structure, it is little to take up room, can either realize the Oil-gas Separation purpose of crankcase waste gas well, prevent that " oil spout " phenomenon from appearring in motor when high loaded process, can alleviate the weight of crankcase again, reduce the cost of crankcase.
The purpose of this utility model is achieved in that on the wall of mould assembling one side of left and right sides crankcase and is respectively equipped with corresponding forming cavity, form the waste gas disengagement chamber behind the crankcase assembling of the left and right sides, forming cavity on each crankcase comprises upstream cavity, downstream cavity and will going up, the throat that the downstream cavity upper lateral is communicated with, the upstream cavity of the forming cavity of one of them crankcase is provided with exhaust gas entrance, the top of downstream cavity is provided with waste gas outlet, the bottom of downstream cavity is provided with spill port, on the forming cavity on two crankcases, be equipped with in the downstream cavity and be used to hinder the straight-through muscle of air-flow, muscle in the upstream cavity is between exhaust gas entrance and throat, muscle in the downstream cavity is between throat and waste gas outlet, on, muscle in the downstream cavity extend downwards by upper wall in the chamber and and lower wall between leave ventilating hole, being used in the forming cavity of left and right sides crankcase hindered the straight-through muscle spatial position correspondence of air-flow, the upper wall of described forming cavity is provided with the mould assembling face of crankcase, lower wall and last, the horizontal-extending height that being used in the downstream cavity hindered the straight-through muscle of air-flow flushes with mould assembling face, be provided with in the described throat and be used to hinder the straight-through muscle of air-flow, this horizontal-extending height that is used to hinder the straight-through muscle of air-flow is lower than mould assembling face.
Owing to adopted such scheme, be respectively equipped with corresponding forming cavity on the wall with mould assembling one side of left and right sides crankcase, form the waste gas disengagement chamber after the mould assembling, forming cavity on each crankcase comprises upstream cavity, downstream cavity and will going up, the throat that the downstream cavity upper lateral is communicated with, and on, be equipped with in the downstream cavity and be used to hinder the straight-through muscle of air-flow, these muscles extend downwards by upper wall in the chamber and and lower wall between leave ventilating hole, form a structure that is similar to the labyrinth thus, the oil gas mix waste gas that produces in crankcase when making engine operation is totally towards lateral flow from being from upstream to the downstream after exhaust gas entrance enters in the upstream cavity, being hindered the straight-through muscle of air-flow by being used in the upstream cavity therebetween hinders, the formation delay of circling round, can only pass through from the ventilating hole of muscle below then, upwards climb over throat again and enter downstream cavity, be hampered by interior being used to of downstream cavity again and hinder the straight-through muscle of air-flow, force and flow downward, after treating ventilating hole, just rise and discharge from waste gas outlet through the muscle below.Because the elaioleucite that contains in the oil gas mix waste gas overweights gas, walk in the waste gas disengagement chamber the oil gas mix waste gas be the wave curve of S shape by lateral flow, when the oil gas mix waste gas is used to hinder the straight-through muscle of air-flow in upstream cavity obstruction circle round be detained after, elaioleucite falls gradually because of deadweight, and be attached to muscle and the chamber wall is separated from the gas, the gas of cutting out partial elaioleucite from the ventilating hole of muscle below by after be obstructed again, the elaioleucite that falls is difficult to climb over throat, gas upwards climbs over throat and enters the delay of circling round of obstruction that downstream cavity is used to hinder the straight-through muscle of air-flow again, once more elaioleucite is isolated and be attached to muscle and chamber wall, isolated elaioleucite falls to accumulating oil droplet because of deadweight and flows back in the crankcase from the spill port of downstream cavity bottom, and the gas behind the isolated elaioleucite rises and discharges from the top waste gas outlet of downstream cavity.Because of the stroke of waste gas lateral flow in the waste gas disengagement chamber longer relatively; and being used in the downstream cavity hinder the straight-through muscle of air-flow again bending extension between waste gas outlet and the spill port; make isolated elaioleucite not go out waste gas outlet with gas blowing; so the separation structure of this crankcase waste gas can reach the waste gas emission standard of protection environment more completely with Oil-gas Separation.
Again owing to be throat between the chamber, upstream and downstream, described throat is upwards arched upward by the lower wall between the chamber, upstream and downstream and forms, respectively be provided with one in the chamber, upstream and downstream and be used to hinder the straight-through muscle of air-flow, its structure is much simpler than the complicated labyrinth structure of prior art, the space that occupies is little, used material is few, can reduce the volume and weight of crankcase, can reduce cost of material again, especially can prevent the fuel injection event of crankcase waste gas discharging, its effect is better than the prior art constructions scheme.
The upper wall of described forming cavity is provided with the mould assembling face of crankcase, the horizontal-extending height that being used in lower wall and the chamber, upstream and downstream hindered the straight-through muscle of air-flow flushes with mould assembling face, make being used in lower wall and the chamber, upstream and downstream hinder the straight-through muscle of air-flow and when mould assembling, have the mating face that can fit tightly equally, prevent that air-flow from boring from junction point, influence hinders effect.The horizontal-extending height that being used to of being provided with in its throat hindered the straight-through muscle of air-flow is lower than mould assembling face, being used in latter two corresponding throat of mould assembling hindered between the straight-through muscle of air-flow and leaves the space that air communication is crossed, can not block throat fully, break-in is flow through after allowing the part air-flow be obstructed at this place, further the oil gas in the waste gas is separated, improve separating effect.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the forming cavity structural representation of the utility model right crankcase;
Fig. 2 is the forming cavity structural representation of the utility model left crankcase;
Fig. 3 is that the waste gas of prior art separates the structural representation in labyrinth.
In the accompanying drawing, 10 is right crankcase, and 20 is left crankcase, and 11,21 is upstream cavity, 12,22 is downstream cavity, and 13,23 is throat, and 14,24 are mould assembling face, and 15 is exhaust gas entrance, 16 is spill port, and 17 is waste gas outlet, and 18,28 is lower wall, and a, b, c are muscle.
Embodiment
Referring to Fig. 1, Fig. 2, be a kind of preferred embodiment of the present utility model.Be respectively equipped with corresponding forming cavity on the wall of mould assembling one side of left crankcase 20, right crankcase 10, the throat 13,23 that forming cavity on two crankcases includes upstream cavity 11,21, downstream cavity 12,22 and chamber, upstream and downstream upper lateral is communicated with, described throat is upwards arched upward by the lower wall between the chamber, upstream and downstream 18,28 and forms.Wherein the upstream cavity 11 of the forming cavity of right crankcase 10 is provided with exhaust gas entrance 15, the top of downstream cavity 12 is provided with waste gas outlet 17, the bottom of downstream cavity 12 is provided with spill port 16, on, be equipped with one in the downstream cavity and be used to hinder the straight-through muscle a of air-flow, b, muscle a in the upstream cavity 11 is between exhaust gas entrance 15 and throat 13, muscle b in the downstream cavity 12 is between throat 13 and waste gas outlet 17, on it, muscle in the downstream cavity extend downwards by the forming cavity upper wall and and lower wall between leave ventilating hole, it is curved shape that being used in the downstream cavity 12 hindered the straight-through muscle b of air-flow, by upper wall in the chamber downwards between the waste gas outlet through extending to downstream cavity 12 after the bending 17 and the spill port 16, could rise from waste gas outlet 17 discharges after making the extending end after waste gas must be walked around bending, and isolated machine oil flows back in the crankcase from spill port 16.The extending end end of muscle b in the downstream cavity 12 is made as arc end, can increase this place's area and adhere to elaioleucite, and make the elaioleucite that adheres to along the quick oil inlet and oil return hole 16 of dropping that glides of circular arc.The contour shape of the upstream cavity 21 of the forming cavity of left crankcase 20, downstream cavity 22 and throat 23 that chamber, upstream and downstream upper lateral is communicated with and identical being symmetrical arranged of forming cavity of right crankcase 10, being used in its upstream cavity 21, the downstream cavity 22, to hinder muscle a, b that air-flow leads directly to corresponding with interior being used to of forming cavity of right crankcase 10 spatial position that hinders air-flow straight-through muscle a, b.The upper wall of the forming cavity of described left crankcase 20 is provided with the mould assembling face 24 of left crankcase, the upper wall of the forming cavity of right crankcase 10 is provided with the mould assembling face 14 on the crankcase right side, and being used in the lower wall 18,28 of forming cavity and the chamber, upstream and downstream hindered the horizontal-extending height of air-flow straight-through muscle a, b and flush with the mould assembling face 14,24 of casing separately.Left and right crankcase assembling aftershaping chamber forms the waste gas disengagement chamber.It is the structure that is shaped with the crankcase integrally casting that described forming cavity and being used to hinders the straight-through muscle of air-flow.
For improving the effect of separating waste gas, on the basis of said structure, can also be provided for hindering the straight-through muscle c of air-flow in the throat of the forming cavity of two crankcases, the horizontal-extending height that being used in the described throat hindered the straight-through muscle c of air-flow is lower than mould assembling face 14,24.Being used in the described throat hindered the straight-through muscle c of air-flow and is set to two, and two muscle c lay respectively at the leading portion and the rear of close throat.This is used to hinder the straight-through muscle c of air-flow is the structure that is shaped with the crankcase integrally casting equally.
During engine operation, high-temp waste gas in the cylinder can be scurried in the crankcase, cause the gas in the crankcase to expand, air pressure increases, and form mist of oil shape mix waste gas with the lubricant oil of evaporation, mix waste gas enters the waste gas disengagement chamber from the exhaust gas entrance of waste gas disengagement chamber, being subjected to being used in its upstream cavity to hinder the straight-through muscle obstruction back delay of air-flow circles round, force mix waste gas to flow through from the ventilating hole that is used to hinder the straight-through muscle below of air-flow, part elaioleucite in the mix waste gas is attached to chamber wall and muscle, and fall to from waste gas, isolating, after waste gas hinders the straight-through muscle of air-flow through being used in the upstream cavity, gas rises, climb over throat, being hindered the straight-through muscle of air-flow by being used in the throat again hinders, make the part elaioleucite in the waste gas be attached to chamber wall and muscle again, and fall to from waste gas, isolating, enter downstream cavity then, be hampered by interior being used to of downstream cavity again and hinder the straight-through muscle of air-flow, form to be detained and circle round, residual elaioleucite in the waste gas is attached to chamber wall and muscle, and fall to from waste gas, isolating, spill port from the downstream cavity bottom after isolated elaioleucite is assembled flows back to crankcase, the gas of isolating behind the elaioleucite rises, discharge from the waste gas outlet at downstream cavity top, reduce the pollution of crankcase waste gas discharging thus to environment, and eliminated " oil spout " phenomenon that when the bigger high engine load operation of discharge capacity, occurs easily, environment protection effect is better than prior art.
The utility model not only is confined to an above-mentioned embodiment, and the mode of structure that the crankcase waste gas disengagement chamber adopts throat to be communicated with the chamber, upstream and downstream is done a little improvement, all falls into protection domain of the present utility model.
Claims (6)
1. the gas oil separation structure of the waste gas of an engine crankcase, be respectively equipped with corresponding forming cavity on the wall of mould assembling one side of left and right sides crankcase, form the waste gas disengagement chamber behind the crankcase assembling of the left and right sides, it is characterized in that: the forming cavity on each crankcase comprises upstream cavity, downstream cavity and will going up, the throat that the downstream cavity upper lateral is communicated with, the upstream cavity of the forming cavity of one of them crankcase is provided with exhaust gas entrance, the top of downstream cavity is provided with waste gas outlet, the bottom of downstream cavity is provided with spill port, on the forming cavity on two crankcases, be equipped with in the downstream cavity and be used to hinder the straight-through muscle of air-flow, muscle in the upstream cavity is between exhaust gas entrance and throat, muscle in the downstream cavity is between throat and waste gas outlet, on, muscle in the downstream cavity extend downwards by upper wall in the chamber and and lower wall between leave ventilating hole, being used in the forming cavity of left and right sides crankcase hindered the straight-through muscle spatial position correspondence of air-flow, the upper wall of described forming cavity is provided with the mould assembling face of crankcase, lower wall and last, the horizontal-extending height that being used in the downstream cavity hindered the straight-through muscle of air-flow flushes with mould assembling face, be provided with in the described throat and be used to hinder the straight-through muscle of air-flow, this horizontal-extending height that is used to hinder the straight-through muscle of air-flow is lower than mould assembling face.
2. the gas oil separation structure of the waste gas of engine crankcase according to claim 1, it is characterized in that: described throat is upwards arched upward by the lower wall between the chamber, upstream and downstream and forms.
3. the gas oil separation structure of the waste gas of engine crankcase according to claim 1 is characterized in that: respectively be provided with one in the chamber, described upstream and downstream and be used to hinder the straight-through muscle of air-flow.
4. according to the gas oil separation structure of the waste gas of the arbitrary described engine crankcase of claim 1～3, it is characterized in that: it is curved shape that being used in the described downstream cavity hindered the straight-through muscle of air-flow, by upper wall in the chamber downwards between the waste gas outlet and spill port through extending to downstream cavity after the bending.
5. the gas oil separation structure of the waste gas of engine crankcase according to claim 4 is characterized in that: the extending end end that being used to of described curved shape hindered the straight-through muscle of air-flow is an arc end.
6. the gas oil separation structure of the waste gas of engine crankcase according to claim 1 is characterized in that: described forming cavity and to be used to hinder the straight-through muscle of air-flow be the structure that is shaped with the crankcase integrally casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200984585U CN201232577Y (en) | 2008-05-30 | 2008-05-30 | Oil gas separating structure for exhaust gas of engine crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200984585U CN201232577Y (en) | 2008-05-30 | 2008-05-30 | Oil gas separating structure for exhaust gas of engine crankcase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201232577Y true CN201232577Y (en) | 2009-05-06 |
Family
ID=40618954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200984585U Expired - Lifetime CN201232577Y (en) | 2008-05-30 | 2008-05-30 | Oil gas separating structure for exhaust gas of engine crankcase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201232577Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291417A (en) * | 2013-06-28 | 2013-09-11 | 力帆实业(集团)股份有限公司 | Engine respiratory system arranged on crankcase |
| CN103821590A (en) * | 2014-02-26 | 2014-05-28 | 江门市大长江集团有限公司 | Crankcase oil-gas separation mechanism |
| CN105221215A (en) * | 2015-11-17 | 2016-01-06 | 浙江钱江摩托股份有限公司 | Deaerator on a kind of engine case of motorcycle |
| CN113958384A (en) * | 2021-10-19 | 2022-01-21 | 重庆隆鑫发动机有限公司 | Tricycle engine and engine crankcase |
-
2008
- 2008-05-30 CN CNU2008200984585U patent/CN201232577Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291417A (en) * | 2013-06-28 | 2013-09-11 | 力帆实业(集团)股份有限公司 | Engine respiratory system arranged on crankcase |
| CN103821590A (en) * | 2014-02-26 | 2014-05-28 | 江门市大长江集团有限公司 | Crankcase oil-gas separation mechanism |
| CN105221215A (en) * | 2015-11-17 | 2016-01-06 | 浙江钱江摩托股份有限公司 | Deaerator on a kind of engine case of motorcycle |
| CN105221215B (en) * | 2015-11-17 | 2018-06-01 | 浙江钱江摩托股份有限公司 | A kind of gs-oil separator on engine case of motorcycle |
| CN113958384A (en) * | 2021-10-19 | 2022-01-21 | 重庆隆鑫发动机有限公司 | Tricycle engine and engine crankcase |
| CN113958384B (en) * | 2021-10-19 | 2023-02-07 | 重庆隆鑫发动机有限公司 | Tricycle engine and engine crankcase |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090506 Effective date of abandoning: 20080530 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20090506 Effective date of abandoning: 20080530 |