CN102200071A - Engine cylinder hood ventilating cover plate with oil return structure - Google Patents
Engine cylinder hood ventilating cover plate with oil return structure Download PDFInfo
- Publication number
- CN102200071A CN102200071A CN2011101239904A CN201110123990A CN102200071A CN 102200071 A CN102200071 A CN 102200071A CN 2011101239904 A CN2011101239904 A CN 2011101239904A CN 201110123990 A CN201110123990 A CN 201110123990A CN 102200071 A CN102200071 A CN 102200071A
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- China
- Prior art keywords
- stabilizing cavity
- cover plate
- pressure stabilizing
- oil
- pressure
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- 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.)
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 44
- 238000009423 ventilation Methods 0.000 claims description 12
- 239000003921 oil Substances 0.000 abstract description 24
- 239000010705 motor oil Substances 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000010721 machine oil Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to an engine cylinder hood ventilating cover plate with an oil return structure, which comprises a cover plate body, an oil guide slot is designed along with the flow field of gas in a labyrinth on one face of the cover plate body toward the labyrinth, and a primary oil return hole is designed in the oil accumulation position of the oil guide slot. The invention has the improvements that a primary pressure stabilizing cavity is arranged at the first oil return hole and on one face of the cover plate body toward a camshaft chamber; and the bottom of the pressure stabilizing cavity is provided with a secondary oil return. In the invention, the pressure stabilizing cavity is arranged on the cover plate of the engine cylinder hood, the pressure difference between the camshaft chamber and the labyrinth is balanced in the manner of stabilizing pressure and establishing oil pressure, and thus, the natural return flow of engine oil is realized.
Description
Technical field
The present invention relates to a kind of engine lubrication system structure, be specifically related to the oil return structure of engine cylinder cover ventilation cover plate.
Background technique
Traditional engine cylinder cover ventilation cover plate (hereinafter to be referred as cover plate) is designed to flat plate, considers the oil return problem when partial cover plate designs, and design on the cover board has oil guide slot.In engine operation, the waste gas after the crankcase ventilation will flow into the separation labyrinth in the cylinder cover, and separate with machine oil gas in the labyrinth, and according to the designing requirement of motor, the machine oil that separates need flow back in the cylinder head camshaft grease chamber and utilize again.If cover plate is designed to the simple flat plate part, because the separation in cylinder cover labyrinth has retardation, cause the fuel-air mixture air pressure labyrinth in less than camshaft chest air pressure, isolated machine oil can't natural back flow arrive the engine cam chamber in the labyrinth.
Summary of the invention
Technical problem to be solved by this invention is a kind of engine cylinder cover ventilation cover plate that separates the machine oil energy natural back flow in the labyrinth that can allow of design.
Technological scheme of the present invention is as follows:
A kind of engine cylinder cover ventilation cover plate with oil return structure comprises cover board body, cover board body towards the labyrinth one side along with the labyrinth in the flow Field Design of gas oil guide slot is arranged, install meter one-level spill port at the long-pending oil level of oil guide slot.Its improvement is simultaneously to be provided with the one-level pressure stabilizing cavity at the described first spill port place and at cover board body towards camshaft chest; Be provided with the secondary spill port at the bottom of the chamber of described pressure stabilizing cavity.
The present invention is provided with pressure stabilizing cavity on the cover plate of engine cylinder cover, machine oil flow to the spill port place by the oil guide slot of cover plate in the labyrinth during backflow camshaft chest, flows into pressure stabilizing cavity by spill port again, is back to camshaft chest by pressure stabilizing cavity then.When camshaft chest pressure during greater than the labyrinth internal pressure, can set up an intermediate pressure relatively stably in the pressure stabilizing cavity, simultaneously, machine oil can be stored in and produce an engine oil pressure in the pressure stabilizing cavity.By voltage stabilizing with set up the mode of oil pressure, the pressure difference in stabilizer tab wheel shaft chamber and the labyrinth, thus realize the machine oil natural back flow.
Description of drawings
Fig. 1 is a structure of cover plate schematic representation of the present invention;
Fig. 2 is the assembling schematic representation of cover plate and cylinder cover;
Fig. 3 is the partial enlarged drawing of Fig. 2.
Embodiment
Further specify structure of the present invention below in conjunction with accompanying drawing:
As Fig. 1, Fig. 2 and shown in Figure 3, the ventilation cover plate that the present invention relates to is installed in engine cylinder cover 1, the cover board body 2 of ventilation cover plate is the metal stamping plate of thin-walled, flow Field Design along with gas in the labyrinth on cover board body has oil guide slot 24, long-pending oil level in oil guide slot installs meter one-level spill port 22, and design has pressure stabilizing cavity 21 at one-level spill port place.Pressure stabilizing cavity 21 is welded on below the spill port 22 of cover plate 2, at the bottom of the chamber of pressure stabilizing cavity 21, have secondary spill port 23, secondary spill port 23 has certain distance with the axis designs of one-level spill port 22, and two spill ports are staggeredly arranged, can effectively avoid machine oil in the camshaft chest to be splashed to and separate in the labyrinth.
Referring to Fig. 2, when engine operation, because the effect of damming in labyrinth causes the air pressure in the labyrinth 3 to be far smaller than the air pressure of camshaft chest 4, when just simply labyrinth 3 and camshaft chest 4 being communicated with, the machine oil of separating in the labyrinth 3 under pressure can't natural back flow in camshaft chest 4, the pressure stabilizing cavity among the present invention just can effectively solve the problem of pressure difference.Isolated machine oil is flowed to one-level spill port 22 places by oil guide slot on the cover board body 24 in the labyrinth, flows into pressure stabilizing cavity 21 by one-level spill port 22 again.When machine oil flows into pressure stabilizing cavity 21, because labyrinth 3 has only one-level spill port 22 to be communicated with pressure stabilizing cavity 21, pressure stabilizing cavity 21 has only secondary spill port 23 to be communicated with camshaft chest 4, because throttling action, the air pressure of camshaft chest 4 is greater than the air pressure in the pressure stabilizing cavity 21, pressure stabilizing cavity 21 internal air pressures are greater than labyrinth 3 internal air pressures, and machine oil does not need to overcome too big pressure and flows in the pressure stabilizing cavity, again by flowing back to camshaft chest in the pressure stabilizing cavity.If the pressure in the cylinder cover is during much larger than the pressure stabilizing cavity internal pressure, machine oil will be stored in the pressure stabilizing cavity, along with the inflow of machine oil, will set up certain machine oil liquid level in the pressure stabilizing cavity, the oil pressure by machine oil makes machine oil be back in the cylinder cap camshaft grease chamber by spill port 23 like this; If the pressure reduction in pressure stabilizing cavity and the cylinder cover is approaching, machine oil need not to be stored in the pressure stabilizing cavity, is directly refluxed by spill port 23.
The pressure stabilizing cavity structure of the present invention's design stores machine oil in balance pressure, set up oil pressure with the machine oil that stores and come balance pressure reduction when pressure reduction is big.Pressure stabilizing cavity can weld or be riveted on the cover board body by impact briquetting again, and such structure manufacturing is simple and cost is very low.
Pressure stabilizing cavity can be designed as the cavity of difformity and different depth, and concrete shape can require to decide according to arrangement space and pressure.
If a pressure stabilizing cavity can't be set up suitable intermediate pressure, can not reach the purpose of balance pressure, as required, the secondary pressure stabilizing cavity can also be set further, or set gradually secondary, three grades to multistage pressure stabilizing cavity, be as the criterion to reach pressure balance.And corresponding spill port is set at the bottom of the chamber of every grade of pressure stabilizing cavity, the spill port of adjacent pressure stabilizing cavity is staggeredly arranged.Such structure can satisfy in the cylinder cover and the bigger motor of labyrinth internal pressure differences.
Claims (4)
1. the engine cylinder cover ventilation cover plate with oil return structure comprises cover board body (2), cover board body towards the labyrinth one side along with the labyrinth in the flow Field Design of gas oil guide slot (24) is arranged, install meter one-level spill port (22) at the long-pending oil level of oil guide slot;
It is characterized in that: simultaneously be provided with one-level pressure stabilizing cavity (21) towards camshaft chest at the described first spill port place and at cover board body; Be provided with secondary spill port (23) at the bottom of the chamber of described pressure stabilizing cavity.
2. the engine cylinder cover ventilation cover plate with oil return structure according to claim 1, it is characterized in that: described one-level spill port (22) and secondary spill port (23) are staggeredly arranged.
3. the engine cylinder cover ventilation cover plate with oil return structure according to claim 2, it is characterized in that: the secondary pressure stabilizing cavity also further is set under described one-level pressure stabilizing cavity (21), or set gradually secondary, three grades, and corresponding spill port is set at the bottom of the chamber of every grade of pressure stabilizing cavity to multistage pressure stabilizing cavity.
4. the engine cylinder cover ventilation cover plate with oil return structure according to claim 1 and 2, it is characterized in that: the spill port of described adjacent pressure stabilizing cavity is staggeredly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101239904A CN102200071A (en) | 2011-05-14 | 2011-05-14 | Engine cylinder hood ventilating cover plate with oil return structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101239904A CN102200071A (en) | 2011-05-14 | 2011-05-14 | Engine cylinder hood ventilating cover plate with oil return structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102200071A true CN102200071A (en) | 2011-09-28 |
Family
ID=44660989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101239904A Pending CN102200071A (en) | 2011-05-14 | 2011-05-14 | Engine cylinder hood ventilating cover plate with oil return structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102200071A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673136A (en) * | 2015-10-22 | 2016-06-15 | 隆鑫通用动力股份有限公司 | Cylinder head oil-gas separation assembly and engine thereof |
| CN110552755A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | Dry-wet combined internal combustion engine oil pan |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003301710A (en) * | 2002-04-08 | 2003-10-24 | Toyota Industries Corp | Oil separator and internal combustion engine |
| JP2005201189A (en) * | 2004-01-19 | 2005-07-28 | Nissan Diesel Motor Co Ltd | Rocker cover device |
| KR100777257B1 (en) * | 2006-09-26 | 2007-11-20 | 쌍용자동차 주식회사 | Baffle plate for increasing blow-by gas flow rate |
| KR100783888B1 (en) * | 2006-11-21 | 2007-12-10 | 현대자동차주식회사 | Baffle mechanism of automobile engine for oil separation of blow-by gas |
| US20080127953A1 (en) * | 2006-12-01 | 2008-06-05 | Toyota Engineering & Manufacturing North America, Inc. | Engine Head Cover Assembly Having An Integrated Oil Separator |
| CN101545390A (en) * | 2009-03-26 | 2009-09-30 | 重庆长安汽车股份有限公司 | Gas and oil separating plant |
-
2011
- 2011-05-14 CN CN2011101239904A patent/CN102200071A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003301710A (en) * | 2002-04-08 | 2003-10-24 | Toyota Industries Corp | Oil separator and internal combustion engine |
| JP2005201189A (en) * | 2004-01-19 | 2005-07-28 | Nissan Diesel Motor Co Ltd | Rocker cover device |
| KR100777257B1 (en) * | 2006-09-26 | 2007-11-20 | 쌍용자동차 주식회사 | Baffle plate for increasing blow-by gas flow rate |
| KR100783888B1 (en) * | 2006-11-21 | 2007-12-10 | 현대자동차주식회사 | Baffle mechanism of automobile engine for oil separation of blow-by gas |
| US20080127953A1 (en) * | 2006-12-01 | 2008-06-05 | Toyota Engineering & Manufacturing North America, Inc. | Engine Head Cover Assembly Having An Integrated Oil Separator |
| CN101545390A (en) * | 2009-03-26 | 2009-09-30 | 重庆长安汽车股份有限公司 | Gas and oil separating plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673136A (en) * | 2015-10-22 | 2016-06-15 | 隆鑫通用动力股份有限公司 | Cylinder head oil-gas separation assembly and engine thereof |
| CN110552755A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | Dry-wet combined internal combustion engine oil pan |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110928 |