CN103670780A - Diesel cylinder cover - Google Patents
Diesel cylinder cover Download PDFInfo
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- CN103670780A CN103670780A CN201210343989.7A CN201210343989A CN103670780A CN 103670780 A CN103670780 A CN 103670780A CN 201210343989 A CN201210343989 A CN 201210343989A CN 103670780 A CN103670780 A CN 103670780A
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- cylinder
- diesel engine
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Abstract
The invention discloses a diesel cylinder cover comprising a cylinder cover body and an oil-gas separation cavity formed in the top of the cylinder cover body. A gas inlet of the oil-gas separation cavity and a gas outlet thereof are arranged in the lower right and upper right of the oil-gas separation cavity respectively. The flow surface between the gas inlet of the oil-gas separation cavity and the gas outlet thereof is provided with a multi-row cylindrical oil-gas separation structures. The diesel cylinder cover is simple and reasonable in structure; cylinders are arranged at intervals in multiple rows for oil-gas separation, so that chances of oil droplets being in effective contact collision with the cylinders are increased, and oil-gas separation effect is improved; meanwhile, dead flow areas are greatly eliminated, and overall flow resistance is decreased. Gas flow speed is kept high, so that chances of floating oil droplets colliding with and being intercepted by the walls of the cylinders are increased, and oil-gas separation effect is improved.
Description
Technical field
The present invention relates to field of internal combustion engine, particularly a kind of cylinder of diesel engine housing.
Background technique
Day by day harsh due to Abgasgesetz also improved the emission request of particulate matter thereupon, is therefore necessary to improve the oil-gas separation efficiency of engine breathing system, to reach, reduces granular material discharged object.
Existing cylinder of diesel engine housing carries out Oil-gas Separation mode and mainly adopts mazy type dividing plate in conjunction with oil suction sponge.After gas mixture enters cylinder head cover, march to labyrinth outlet between the mazy type dividing plate being parallel to each other, the elaioleucite suspending in this process is tackled by dividing plate, past downstream to oil collecting groove under the effect of gravity.Or when gas mixture is by oil suction sponge, the machine oil particle of suspension is adsorbed by oil suction sponge.
Under charge flow rate and the certain condition of outlet pressure, mazy type diaphragm structure has the following disadvantages the effect of Oil-gas Separation: first, the probability that elaioleucite effectively contacts dividing plate wall is less, and in the flow field in maze-type structure, flow dead is larger, bring the larger defect of overall flow resistance, affected the discharge of gas mixture in cylinder of diesel engine housing.Secondly, utilize sponge to adsorb and be suspended in the elaioleucite in gas mixture, have too the defect that flow resistance is larger, affect the discharge of gas mixture in cylinder of diesel engine housing.Finally, along with the increasing of gas mixture flow resistance, liquid speed can reduce, and this can further reduce the elaioleucite of suspension and the probability that wall collides and is blocked, so the oil gas separation of cylinder head cover can further be given a discount.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, provides a kind of simple and reasonable, the cylinder of diesel engine housing of good oil gas separation effect.
For achieving the above object, according to the invention provides a kind of cylinder of diesel engine housing, comprise: cylinder head cover body, and the oil-gas separation chamber that is arranged on cylinder head cover bodies top, the suction port of oil-gas separation chamber and air outlet are opened in respectively the Ce He upper right side, lower-left of oil-gas separation chamber; On the suction port of oil-gas separation chamber and the flow-passing surface between air outlet, be provided with many row's cylindrical body gas oil separation structures.
In technique scheme, arrange cylindrical body gas oil separation structure more and by a plurality of cylindrical bodys, be arranged in rows and form, every row's cylindrical body interval arranges.
In technique scheme, cylindrical top is fixed on the roof of oil-gas separation chamber, and extends straight down.
In technique scheme, the interlaced setting in gap between adjacent row's cylindrical body.
In technique scheme, the oil collecting groove of this cylinder of diesel engine housing is inverted cone surface structure, and bottom offers machine oil refluxing opening.
Compared with prior art, the present invention has following beneficial effect: this diesel engine cylinder cover cover structure advantages of simple, the cylindrical body of arranging setting by interval carries out Oil-gas Separation more, has improved the probability of elaioleucite and the effective contact-impact of cylindrical body, has improved oil gas separation.Eliminated to a great extent flow dead, therefore reduced overall flow resistance, gas flow rate has been remained on to higher level, increased equally the elaioleucite of suspension and the probability that cylindrical body wall collides and is blocked, improved oil gas separation simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of cylinder of diesel engine housing of the present invention;
Fig. 2 is the sectional structure schematic diagram of the A-A direction of Fig. 1;
Fig. 3 is the sectional structure schematic diagram of the B-B direction of Fig. 1;
Fig. 4 is new and old two kinds of oil-gas separation efficiency result of calculation comparison diagrams;
Description of reference numerals:
1-cylinder head cover body, 2-oil-gas separation chamber, 21-suction port, 22-air outlet, 23-oil collecting groove, 3-cylindrical body.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.It will be appreciated that, mentioned in following mode of execution of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, do not represent the restriction to the concrete technological scheme of the present invention.
The mazy type dividing plate gas oil separation structure that cylindrical body gas oil separation structure replaces original cylinder head cover is arranged in cylinder of diesel engine housing of the present invention utilization more, while making gas mixture pass this many rows cylindrical region, elaioleucite strikes on cylindrical body, and under the effect of gravity, flow to downwards in oil collecting groove, the gas after filtration continues to march to cylinder head cover outlet.
(arrow represents that gas mixture flows to) as shown in Figure 1 to Figure 3, this cylinder of diesel engine housing comprises: cylinder head cover body 1, and the oil-gas separation chamber 2 that is arranged on this cylinder head cover body 1 top, the suction port 21 of this oil-gas separation chamber 2 is opened in the lower-left side of oil-gas separation chamber 2; Air outlet 22 is opened in the upper right side of oil-gas separation chamber 2; Oil collecting groove 23 is arranged on the bottom of oil-gas separation chamber 2, and between suction port 21 and air outlet 22, oil collecting groove 23 is inverted cone surface structure, and bottom offers machine oil refluxing opening, and the fluid oil of conveniently separating flows back to diesel engine oil pan from machine oil refluxing opening.
As shown in Figure 1, on the suction port 21 of oil-gas separation chamber 2 and the flow-passing surface between air outlet 22, be provided with cylindrical body gas oil separation structure, this many rows cylindrical body gas oil separation structure is arranged in rows by vertical cylindrical body and forms that (top of cylindrical body 3 is fixed on the roof of oil-gas separation chamber 2, extend straight down), every row's cylindrical body 3 intervals arrange, and the interlaced setting in gap between adjacent row's cylindrical body, like this, gas mixture is from suction port 21 enters, by the gap between cylindrical body 3, pass through this cylindrical body gas oil separation structure, the machine oil particle being suspended in gas mixture collides on cylindrical body 3, thereby be blocked, flow in oil collecting groove 23 downwards.Utilize cylindrical body to carry out the mode of Oil-gas Separation, the probability of elaioleucite and the effective contact-impact of cylindrical body is higher, improved oil gas separation, eliminated to a great extent flow dead simultaneously, therefore reduced overall flow resistance, gas flow rate is remained on to higher level, increased the elaioleucite of suspension and the probability that cylindrical body wall collides and is blocked, improve the effect of Oil-gas Separation.As shown in Figure 4, by CAE, calculate, find under the same conditions, cylindrical body formula cylinder head cover Oil-gas Separation designs than mazy type device oil-gas separation efficiency mean height approximately 13%, and flow resistance reduces approximately 36%.
Below the CFD result of calculation that mazy type and two kinds of Oil-gas Separation design proposals of cylindrical body formula are carried out, can find out, in the situation that boundary conditions is consistent, the scheme of cylindrical body formula is obviously better than mazy scheme to being less than the separating effect of the elaioleucite of 5 μ m diameters.
This diesel engine cylinder cover cover structure advantages of simple, the cylindrical body of arranging setting by interval carries out Oil-gas Separation more, has improved the probability of elaioleucite and the effective contact-impact of cylindrical body, has improved oil gas separation.Eliminated to a great extent flow dead, therefore reduced overall flow resistance, gas flow rate has been remained on to higher level, increased equally the elaioleucite of suspension and the probability that cylindrical body wall collides and is blocked, improved oil gas separation simultaneously.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (5)
1. a cylinder of diesel engine housing, it is characterized in that, comprise: cylinder head cover body, and the oil-gas separation chamber that is arranged on described cylinder head cover bodies top, the suction port of described oil-gas separation chamber and air outlet are opened in respectively the Ce He upper right side, lower-left of described oil-gas separation chamber; On the suction port of described oil-gas separation chamber and the flow-passing surface between air outlet, be provided with many row's cylindrical body gas oil separation structures.
2. cylinder of diesel engine housing according to claim 1, is characterized in that: described many row's cylindrical body gas oil separation structures are arranged in rows by a plurality of cylindrical bodys and form, and the described cylindrical body of every row interval arranges.
3. cylinder of diesel engine housing according to claim 2, is characterized in that: described cylindrical top is fixed on the roof of described oil-gas separation chamber, and extends straight down.
4. cylinder of diesel engine housing according to claim 2, is characterized in that: the interlaced setting in gap between the described cylindrical body of adjacent row.
5. according to the cylinder of diesel engine housing described in any one in claim 1 to 4, it is characterized in that: the oil collecting groove of this cylinder of diesel engine housing is inverted cone surface structure, and bottom offers machine oil refluxing opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210343989.7A CN103670780A (en) | 2012-09-17 | 2012-09-17 | Diesel cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210343989.7A CN103670780A (en) | 2012-09-17 | 2012-09-17 | Diesel cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103670780A true CN103670780A (en) | 2014-03-26 |
Family
ID=50309366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210343989.7A Pending CN103670780A (en) | 2012-09-17 | 2012-09-17 | Diesel cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089741A (en) * | 2014-04-18 | 2015-11-25 | 比亚迪股份有限公司 | Engine and cylinder head cover assembly thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11350935A (en) * | 1998-06-05 | 1999-12-21 | Fuji Heavy Ind Ltd | Blow-by gas oil separating equipment |
| CN201650410U (en) * | 2010-04-15 | 2010-11-24 | 上海联谊汽车拖拉机工贸有限公司 | Valve chamber cover oil-gas separating structure |
| CN102182532A (en) * | 2011-04-29 | 2011-09-14 | 奇瑞汽车股份有限公司 | Oil-gas separating mechanism |
| CN202125369U (en) * | 2011-05-25 | 2012-01-25 | 广西玉柴机器股份有限公司 | Cover plate component for cylinder lid |
| CN102410061A (en) * | 2010-09-20 | 2012-04-11 | 广西玉柴机器股份有限公司 | Engine respirator assembly |
| CN202832834U (en) * | 2012-09-17 | 2013-03-27 | 广西玉柴机器股份有限公司 | Diesel engine cylinder head cover |
-
2012
- 2012-09-17 CN CN201210343989.7A patent/CN103670780A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11350935A (en) * | 1998-06-05 | 1999-12-21 | Fuji Heavy Ind Ltd | Blow-by gas oil separating equipment |
| CN201650410U (en) * | 2010-04-15 | 2010-11-24 | 上海联谊汽车拖拉机工贸有限公司 | Valve chamber cover oil-gas separating structure |
| CN102410061A (en) * | 2010-09-20 | 2012-04-11 | 广西玉柴机器股份有限公司 | Engine respirator assembly |
| CN102182532A (en) * | 2011-04-29 | 2011-09-14 | 奇瑞汽车股份有限公司 | Oil-gas separating mechanism |
| CN202125369U (en) * | 2011-05-25 | 2012-01-25 | 广西玉柴机器股份有限公司 | Cover plate component for cylinder lid |
| CN202832834U (en) * | 2012-09-17 | 2013-03-27 | 广西玉柴机器股份有限公司 | Diesel engine cylinder head cover |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089741A (en) * | 2014-04-18 | 2015-11-25 | 比亚迪股份有限公司 | Engine and cylinder head cover assembly thereof |
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Application publication date: 20140326 |