CN104948262A - Oil-gas separator - Google Patents
Oil-gas separator Download PDFInfo
- Publication number
- CN104948262A CN104948262A CN201510420038.9A CN201510420038A CN104948262A CN 104948262 A CN104948262 A CN 104948262A CN 201510420038 A CN201510420038 A CN 201510420038A CN 104948262 A CN104948262 A CN 104948262A
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- Prior art keywords
- oil
- gas separation
- separation chamber
- gas
- passage
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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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Links
- 238000000926 separation method Methods 0.000 claims abstract description 80
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 29
- 239000003921 oil Substances 0.000 abstract description 28
- 239000010705 motor oil Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 67
- 239000002912 waste gas Substances 0.000 description 20
- 239000010721 machine oil Substances 0.000 description 14
- 238000009423 ventilation Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention belongs to the technical field of automobile engines and provides an oil-gas separator. The oil-gas separator comprises a casing, wherein a mixed gas inlet, a first oil-gas separation cavity, a second oil-gas separation cavity, a third oil-gas separation cavity, a manifold connector channel and a turbine end connector channel are formed in the casing; the mixed gas inlet is communicated with the first oil-gas separation cavity; a plurality of first oil liquid baffles, a dynamic oil return cavity and a first exhaust channel are arranged in the first oil-gas separation cavity; a static oil return cavity is further formed in the casing. According to the oil-gas separator, multiple oil-gas separation cavities are designed, oil and gas can be completely separated due to the special design of the inside of each oil-gas separation cavity, and engine oil is effectively prevented form being sucked into an engine. Besides, a one-way valve is arranged on a balance tube communicated with the turbine end, so that the engine does not have positive pressure in any work condition area, and the problem about positive pressure of a high-power crank case of the oil-gas separator of the engine is solved.
Description
Technical field
The invention belongs to technical field of automobile engine, especially relate to a kind of deaerator effectively can isolating oil and gas be applied in crankcase ventilation system.
Background technique
When engine operation, the high pressure inflammable mixture of firing chamber and burnt gas, sub-fraction can be bled in crankcase by the gap between piston group and cylinder, be commonly called as waste gas, composition is fuel vapor, water vapour and the waste gas etc. that do not fire, these waste gas can dilute machine oil, reduce the usability of machine oil, accelerate the oxidation of machine oil, go bad and can form greasy filth, clogged oil line; Sour gas in waste gas is mixed into lubrication system, can cause corrosion and the accelerated wear test of engine part, and waste gas also can make the overpressure of crankcase and destroy the sealing of crankcase, and engine oil leakage is run off.
For preventing crankcase pressure too high, extend machine oil life time, reduce parts depreciation and corrosion, prevent engine oil leakage, in addition, for meeting the emission request of increasingly stringent and improving Economy, so have PCV system in Automobile Motor Design process, its function by the pressure difference of suction tude and crankcase, waste gas is introduced motor to do secondary combustion, and the machine oil particulate (mist of oil) of engine interior also can be brought into suction tude when flowing to suction tude due to waste gas, so forced ventilation system of engine must have very important parts-----deaerator, deaerator in engine crankcase ventilating apparatus just can solve the problem, the machine oil after separation is made to flow back to crankcase, and do not have the waste gas of machine oil to enter motor to do secondary combustion after filtering, prevent machine oil from entering the unnecessary consumption of carbon distribution and engine motor oil gas handling system and firing chamber caused.Also deaerator design must be carried out in Automobile Motor Design process.Motor has been installed crankcase bleeder and just can have been solved or alleviate the problems referred to above.
Mandatory ventilation can be divided into open type and enclosed two kinds, and open type forced ventilation is directly communicated with crankcase with the external world exactly.
Enclosed forced ventilation mode, by the appropriate location of the mixed gas in crankcase by connecting tube guiding suction tude, returns cylinder and rekindles, so both can reduce exhaust pollution, improve again the Economy of motor.Current vehicle gasoline engine all adopts mandatory ventilation, and transportation diesel also gradually adopts mandatory ventilation.
The effect of deaerator is separated from mixed gas by the machine oil in the waste gas of crankcase row, makes it get back to oil sump.
Petrol engine operationally, the pressurized gas that cylinder combustion is burnt have a fraction of gas-----while the acting of promotion piston, and we are referred to as waste gas, crankcase is scurried into by the gap of piston ring, containing organic oil in discarded, if waste gas effectively can not be separated with machine oil, car machine oil will be shone into reduce, the situations such as outlet pipe blackening.There is the defect that oil and gas effectively cannot be separated in the deaerator on the motor of existing popular series.
So designing a can be effectively required at present by the deaerator that waste gas is separated with machine oil.
Summary of the invention
Technical problem to be solved by this invention is: provide a can effectively by deaerator that waste gas is separated with machine oil.
The technical solution used in the present invention is: a kind of deaerator, comprise housing, housing is provided with mixed gas suction port, the first oil-gas separation chamber, the second oil-gas separation chamber, the 3rd oil-gas separation chamber, manifold head passage, turbine end interface channel, mixed gas suction port is communicated with the first oil-gas separation chamber, is provided with several the first fluid baffle plates, dynamically oil back chamber and the first exhaust steam passage in the first oil-gas separation chamber; Housing is also provided with static oil back chamber;
The first described exhaust steam passage communicates with the second oil-gas separation chamber, and establish Oil-gas Separation assembly, sealed cover, the second drainback passage and the second exhaust steam passage in the second oil-gas separation chamber, the second drainback passage is communicated with static oil back chamber;
The second described exhaust steam passage communicates with the 3rd oil-gas separation chamber, and be provided with several the 3rd fluid baffle plates, the 3rd drainback passage, the 3rd exhaust steam passage in the 3rd oil-gas separation chamber, the 3rd drainback passage is communicated with static oil back chamber;
Described turbine end interface channel is provided with one-way valve, and one-way valve region is divided into epicoele and cavity of resorption by one-way valve, and the 3rd described exhaust steam passage communicates with cavity of resorption, and epicoele communicates with manifold head passage; One end of turbine end interface channel communicates with cavity of resorption, and the other end of turbine end interface channel communicates with manifold head passage.
Be provided with a first fluid baffle plate in the first described oil-gas separation chamber, the upper-end surface of the first fluid baffle plate is lower than the first oil-gas separation chamber inner top surface.
The first described exhaust steam passage upper-end surface is higher than the inner bottom surface of the first oil-gas separation chamber.
Described Oil-gas Separation assembly refers in sealed cover and the second oil-gas separation chamber and is all interval with multiple baffle plate along gas traffic direction, second exhaust steam passage is arranged on the end of the second oil-gas separation chamber, forms the second drainback passage between described sealed cover.
All baffle plate fixed end the same sides on described sealed cover are equipped with through hole, form the second drainback passage between through hole.
Described is equipped with bumping post between adjacent baffle plate.
Described bumping post is arranged between the adjacent screen of sealed cover.
Be provided with two the 3rd fluid baffle plates in the 3rd described oil-gas separation chamber and form T-type structure, the upper-end surface of one of them the 3rd fluid baffle plate is lower than another one the 3rd fluid baffle plate upper-end surface.
The second described oil-gas separation chamber is positioned at the below of the first oil-gas separation chamber and the first oil-gas separation chamber.
Described static oil back chamber is disposed adjacent with dynamic oil back chamber.
The invention has the beneficial effects as follows: a kind of deaerator of the present invention possesses following advantage: the present invention devises multiple tracks oil-gas separation chamber, and not having in oil-gas separation chamber through special design, can be clean by Oil-gas Separation, effectively avoid machine oil and be inhaled into motor.In addition the balance tube being communicated with turbine end does not have one-way valve, so motor does not have malleation in any conditioned area, solves the problem of oil-gas separating device for engine high-power crankshaft case malleation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is back structures schematic diagram of the present invention.
Fig. 3 is the structural representation after the present invention removes cover plate.
Fig. 4 is the structural representation after the present invention removes back cover plate.
Fig. 5 is sealed cover plate structure schematic diagram of the present invention.
In figure: 1, the first oil-gas separation chamber, the 1.1, first fluid baffle plate, 1.2, dynamically oil back chamber, 1.3, the first exhaust steam passage, 2, the second oil-gas separation chamber, 2.1, sealed cover, the 2.2, second exhaust steam passage, 2.3, baffle plate, 2.4, bumping post, the 3, the 3rd oil-gas separation chamber, the 3.1, the 3rd fluid baffle plate, 3.2, the 3rd drainback passage, 3.3, the 3rd exhaust steam passage, 4, housing, 4.1, mixed gas suction port, 4.2, static oil back chamber, 5, manifold head passage, 6, turbine end interface channel, 7, one-way valve, 7.1, epicoele, 7.2, cavity of resorption.
Embodiment
With reference to a kind of deaerator shown in Fig. 1-Fig. 5, comprise housing 4, housing 4 is provided with mixed gas suction port 4.1, first oil-gas separation chamber 1, second oil-gas separation chamber 2, the 3rd oil-gas separation chamber 3, manifold head passage 5, turbine end interface channel 6, mixed gas suction port 4.1 is communicated with in the first oil-gas separation chamber 1, first oil-gas separation chamber 1 and is provided with several the first fluid baffle plates 1.1, dynamically oil back chamber 1.2 and the first exhaust steam passage 1.3; Housing 4 is also provided with static oil back chamber 4.2;
The first described exhaust steam passage 1.3 communicates with the second oil-gas separation chamber 2, establishes Oil-gas Separation assembly, sealed cover 2.1, second drainback passage and the second exhaust steam passage 2.2, second drainback passage to be communicated with static oil back chamber 4.2 in the second oil-gas separation chamber 2;
The second described exhaust steam passage 2.2 communicates with the 3rd oil-gas separation chamber 3, is provided with several the 3rd fluid baffle plates 3.1, the 3rd drainback passage 3.2, the 3rd exhaust steam passage the 3.3, three drainback passage 3.2 be communicated with static oil back chamber 4.2 in the 3rd oil-gas separation chamber 3;
Described turbine end interface channel 6 is provided with one-way valve 7, and one-way valve 7 region is divided into epicoele 7.1 and cavity of resorption 7.2 by one-way valve 7, and the 3rd described exhaust steam passage 3.3 communicates with cavity of resorption 7.2, and epicoele 7.1 communicates with manifold head passage 5; One end of turbine end interface channel 6 communicates with cavity of resorption 7.2, and the other end of turbine end interface channel 6 communicates with manifold head passage 5.
The upper-end surface being provided with first fluid baffle plate 1.1, a first fluid baffle plate 1.1 in the first described oil-gas separation chamber 1 is lower than the first oil-gas separation chamber 1 inner top surface.
The first described exhaust steam passage 1.3 upper-end surface is higher than the inner bottom surface of the first oil-gas separation chamber 1.
Described Oil-gas Separation assembly refers in sealed cover 2.1 and the second oil-gas separation chamber 2 and is all interval with multiple baffle plate 2.3 along gas traffic direction, second exhaust steam passage 2.2 is arranged on the end of the second oil-gas separation chamber 2, between described sealed cover 2.1, form the second drainback passage.
All baffle plates 2.3 fixed end the same side on described sealed cover 2.1 is equipped with through hole, forms the second drainback passage between through hole.
Described is equipped with bumping post 2.4 between adjacent baffle plate 2.3.
Described bumping post 2.4 is arranged between the adjacent screen 2.3 of sealed cover 2.1.
The second described oil-gas separation chamber 2 is positioned at the below of the first oil-gas separation chamber 1 and the first oil-gas separation chamber 1.
Be provided with two the 3rd fluid baffle plates 3.1 in the 3rd described oil-gas separation chamber 3 and form T-type structure, the upper-end surface of one of them the 3rd fluid baffle plate 3.1 is lower than another one the 3rd fluid baffle plate 3.1 upper-end surface.
Described static oil back chamber 4.2 is disposed adjacent with dynamic oil back chamber 1.2.
Working principle of the present invention is: waste gas enters the first fluid disengagement chamber 1 from bottom to top from mixed gas suction port 4.1, stop speed through the first fluid baffle plate 1.1, part fluid is gathered on the first fluid disengagement chamber 1 inwall, backflow enters dynamic oil back chamber 1.2, waste gas continues to enter in the second oil-gas separation chamber 2 downwards from the first exhaust steam passage 1.3, baffle plate 2.3 on the second oil-gas separation chamber 2 and sealed cover 2.1 and the filtration blocking 2.4, fluid is substantially totally separated, static oil back chamber 4.2 is entered through the second drainback passage after backflow, waste gas again work second exhaust steam passage 3.1 enters the 3rd oil-gas separation chamber 3 from bottom to top, stop through the 3rd fluid baffle plate 3.1 and reduce speed, the words of oil are also had in gas, can again be stopped, assembling can from the static oil back chamber 4.2 of the 3rd drainback passage 3.2 runner, waste gas enters into cavity of resorption 7.2 from the 3rd exhaust steam passage 3.3, 1: during idling, throttle opening is minimum, the piston air-breathing of motor makes intake manifold vacuum maximum, and reach-0.7kg/cm, one-way valve 7 is minimum by cross section, and waste gas is inhaled into manifold and participates in secondary combustion after the separation of deaerator.
2: during small-power state, the degree of vacuum of intake manifold diminishes or close to a barometric pressure, now one-way valve 7 is maximum by cross section, and waste gas is inhaled into manifold and participates in secondary combustion after the separation of deaerator.
3: when acceleration or large operating mode export, turbine produces pressure, and one-way valve 7 is closed, then sucked by turbine end by the waste gas after Oil-gas Separation and after intercooler, enter manifold, the increase of cylinder exhausted air quantity during to coordinate high-power.
Claims (10)
1. a deaerator, comprise housing (4), it is characterized in that: housing (4) is provided with mixed gas suction port (4.1), first oil-gas separation chamber (1), second oil-gas separation chamber (2), 3rd oil-gas separation chamber (3), manifold head passage (5), turbine end interface channel (6), mixed gas suction port (4.1) is communicated with the first oil-gas separation chamber (1), several the first fluid baffle plates (1.1) are provided with in first oil-gas separation chamber (1), dynamic oil back chamber (1.2) and the first exhaust steam passage (1.3), housing (4) is also provided with static oil back chamber (4.2),
Described the first exhaust steam passage (1.3) communicates with the second oil-gas separation chamber (2), establish Oil-gas Separation assembly, sealed cover (2.1), the second drainback passage and the second exhaust steam passage (2.2) in second oil-gas separation chamber (2), the second drainback passage is communicated with static oil back chamber (4.2);
Described the second exhaust steam passage (2.2) communicates with the 3rd oil-gas separation chamber (3), be provided with several the 3rd fluid baffle plates (3.1), the 3rd drainback passage (3.2), the 3rd exhaust steam passage (3.3) in 3rd oil-gas separation chamber (3), the 3rd drainback passage (3.2) is communicated with static oil back chamber (4.2);
Described turbine end interface channel (6) is provided with one-way valve (7), one-way valve (7) region is divided into epicoele (7.1) and cavity of resorption (7.2) by one-way valve (7), the 3rd described exhaust steam passage (3.3) communicates with cavity of resorption (7.2), and epicoele (7.1) communicates with manifold head passage (5); One end of turbine end interface channel (6) communicates with cavity of resorption (7.2), and the other end of turbine end interface channel (6) communicates with manifold head passage (5).
2. a kind of deaerator according to claim 1, it is characterized in that: be provided with a first fluid baffle plate (1.1) in described the first oil-gas separation chamber (1), the upper-end surface of the first fluid baffle plate (1.1) is lower than the first oil-gas separation chamber (1) inner top surface.
3. a kind of deaerator according to claim 1, is characterized in that: described the first exhaust steam passage (1.3) upper-end surface is higher than the inner bottom surface of the first oil-gas separation chamber (1).
4. a kind of deaerator according to claim 1, it is characterized in that: described Oil-gas Separation assembly refers in sealed cover (2.1) and the second oil-gas separation chamber (2) and is all interval with multiple baffle plate (2.3) along gas traffic direction, second exhaust steam passage (2.2) is arranged on the end of the second oil-gas separation chamber (2), between described sealed cover (2.1), form the second drainback passage.
5. a kind of deaerator according to claim 4, is characterized in that: all baffle plates (2.3) the fixed end the same side on described sealed cover (2.1) is equipped with through hole, forms the second drainback passage between through hole.
6. a kind of deaerator according to claim 4, is characterized in that: described is equipped with bumping post (2.4) between adjacent baffle plate (2.3).
7. a kind of deaerator according to claim 6, is characterized in that: described bumping post (2.4) is arranged between the adjacent screen (2.3) of sealed cover (2.1).
8. a kind of deaerator according to claim 1, is characterized in that: described the second oil-gas separation chamber (2) is positioned at the below of the first oil-gas separation chamber (1) and the first oil-gas separation chamber (1).
9. a kind of deaerator according to claim 1, it is characterized in that: be provided with two the 3rd fluid baffle plates (3.1) in the 3rd described oil-gas separation chamber (3) and form T-type structure, the upper-end surface of one of them the 3rd fluid baffle plate (3.1) is lower than another one the 3rd fluid baffle plate (3.1) upper-end surface.
10. a kind of deaerator according to claim 1, is characterized in that: described static oil back chamber (4.2) is disposed adjacent with dynamic oil back chamber (1.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510420038.9A CN104948262A (en) | 2015-07-16 | 2015-07-16 | Oil-gas separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510420038.9A CN104948262A (en) | 2015-07-16 | 2015-07-16 | Oil-gas separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104948262A true CN104948262A (en) | 2015-09-30 |
Family
ID=54163261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510420038.9A Withdrawn CN104948262A (en) | 2015-07-16 | 2015-07-16 | Oil-gas separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104948262A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275540A (en) * | 2015-11-18 | 2016-01-27 | 金春夫 | Oil-gas separator |
| CN109458241A (en) * | 2018-12-05 | 2019-03-12 | 神通科技集团股份有限公司 | A kind of oil return pipe of gs-oil separator |
| CN112796853A (en) * | 2019-10-28 | 2021-05-14 | 浙江荣际汽车零部件股份有限公司 | Oil and gas separator |
| CN114278412A (en) * | 2020-09-28 | 2022-04-05 | 北京汽车动力总成有限公司 | Oil-gas separator, engine and automobile |
| CN119467052A (en) * | 2024-11-26 | 2025-02-18 | 中国第一汽车股份有限公司 | Oil-gas separators, hydrogen engines and vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322369A (en) * | 2011-07-22 | 2012-01-18 | 奇瑞汽车股份有限公司 | Crank case ventilation structure of supercharged engine |
| US20120159911A1 (en) * | 2010-12-22 | 2012-06-28 | Caterpillar Inc. | Crankcase filter |
| CN203257558U (en) * | 2013-04-28 | 2013-10-30 | 长城汽车股份有限公司 | Supercharged engine air cylinder head cover of integrated crankcase ventilation system |
| CN203441567U (en) * | 2013-08-29 | 2014-02-19 | 安徽江淮汽车股份有限公司 | Oil-gas separator and engine cylinder cover sheath |
| CN204436526U (en) * | 2015-02-06 | 2015-07-01 | 重庆长安汽车股份有限公司 | A kind of deaerator |
| CN204851377U (en) * | 2015-07-16 | 2015-12-09 | 金春夫 | Oil/gas separator |
-
2015
- 2015-07-16 CN CN201510420038.9A patent/CN104948262A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120159911A1 (en) * | 2010-12-22 | 2012-06-28 | Caterpillar Inc. | Crankcase filter |
| CN102322369A (en) * | 2011-07-22 | 2012-01-18 | 奇瑞汽车股份有限公司 | Crank case ventilation structure of supercharged engine |
| CN203257558U (en) * | 2013-04-28 | 2013-10-30 | 长城汽车股份有限公司 | Supercharged engine air cylinder head cover of integrated crankcase ventilation system |
| CN203441567U (en) * | 2013-08-29 | 2014-02-19 | 安徽江淮汽车股份有限公司 | Oil-gas separator and engine cylinder cover sheath |
| CN204436526U (en) * | 2015-02-06 | 2015-07-01 | 重庆长安汽车股份有限公司 | A kind of deaerator |
| CN204851377U (en) * | 2015-07-16 | 2015-12-09 | 金春夫 | Oil/gas separator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275540A (en) * | 2015-11-18 | 2016-01-27 | 金春夫 | Oil-gas separator |
| CN109458241A (en) * | 2018-12-05 | 2019-03-12 | 神通科技集团股份有限公司 | A kind of oil return pipe of gs-oil separator |
| CN109458241B (en) * | 2018-12-05 | 2023-10-17 | 神通科技集团股份有限公司 | Oil return pipe of oil-gas separator |
| CN112796853A (en) * | 2019-10-28 | 2021-05-14 | 浙江荣际汽车零部件股份有限公司 | Oil and gas separator |
| CN114278412A (en) * | 2020-09-28 | 2022-04-05 | 北京汽车动力总成有限公司 | Oil-gas separator, engine and automobile |
| CN114278412B (en) * | 2020-09-28 | 2022-11-22 | 北京汽车动力总成有限公司 | Oil-gas separator, engine and automobile |
| CN119467052A (en) * | 2024-11-26 | 2025-02-18 | 中国第一汽车股份有限公司 | Oil-gas separators, hydrogen engines and vehicles |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150930 |
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| WW01 | Invention patent application withdrawn after publication |