CN111502800A - Breather with crankcase pressure adjusting device and diesel engine - Google Patents
Breather with crankcase pressure adjusting device and diesel engine Download PDFInfo
- Publication number
- CN111502800A CN111502800A CN201910089232.1A CN201910089232A CN111502800A CN 111502800 A CN111502800 A CN 111502800A CN 201910089232 A CN201910089232 A CN 201910089232A CN 111502800 A CN111502800 A CN 111502800A
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- gas
- oil
- crankcase
- breather
- adjusting device
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- 238000000926 separation method Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 106
- 239000003921 oil Substances 0.000 description 21
- 238000001914 filtration Methods 0.000 description 11
- 238000009423 ventilation Methods 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000010705 motor oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 238000001704 evaporation Methods 0.000 description 1
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- 239000010763 heavy fuel oil Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/028—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of positive pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
A breather with a crankcase pressure adjusting device and a diesel engine belong to the technical field of diesel engines. The breather with the crankcase pressure adjusting device comprises a gas mixing area, an oil-gas separation area and an oil return area which are sequentially arranged; the gas mixing area is provided with a crankcase blow-by gas pipe and a flow guide piece; the crankcase blowby gas pipe is connected with a pressure adjusting device, and the pressure adjusting device is provided with a reduced flow passage at the part extending into the crankcase blowby gas pipe; the guide piece is provided with a plurality of guide vanes extending towards the oil-gas separation area; the oil-gas separation area is provided with an oil-gas separator and a filtered gas outlet, and the guide vanes extend into a flow channel in the oil-gas separator; the oil return area is provided with an oil return hole. The invention realizes the automatic adjustment of the pressure of the crankcase by the design of the reduced flow passage on the pressure adjusting device, and ensures the stability of the pollutant discharge of the diesel engine.
Description
Technical Field
The invention relates to the technology in the field of diesel engines, in particular to a breather with a crankcase pressure adjusting device and a diesel engine.
Background
The pollutants discharged by the diesel engine mainly comprise combustion waste gas directly discharged by an exhaust pipe and crankcase blowby gas, and as the control of the exhaust pipe emissions by laws and regulations is stricter, the technical improvement mainly focuses on the control of the combustion waste gas directly discharged by the exhaust pipe and achieves remarkable effect; after the direct discharge of combustion exhaust gas from the exhaust pipe is controlled, the proportion of particulate matters in crankcase blowby gas to the total particulate matters discharged from the diesel engine is increased, and the crankcase blowby gas is controlled to further reduce the pollutant discharge.
The crankcase blowby gas refers to combustible mixed gas and burnt gas which leak into the crankcase from a combustion chamber through a clearance between a piston group and a cylinder in the compression, combustion and expansion processes when the internal combustion engine is in operation. The blowby gas enters the crankcase, so that the temperature of the crankcase is increased, the evaporation of the engine oil of the oil pan is increased, part parts in the crankcase are subjected to splash lubrication, oil mist is generated in the splash lubrication process, and the blowby gas contains residual fuel oil, waste gas and carbon black generated by combustion and a large amount of engine oil. If the blow-by gas cannot be discharged in time, fuel steam in the blow-by gas is condensed, so that the engine oil is deteriorated, poor lubrication is caused, and part abrasion and engine oil consumption are increased; if the blow-by gas cannot be discharged in time, the air leakage and oil leakage of the engine can be caused when the pressure of the crankcase is too high. Accordingly, internal combustion engine crankcases require a ventilation system to handle the blow-by gas, separate the oil from the blow-by gas, while maintaining the crankcase pressure within a suitable range.
The crankcase ventilation system is divided into a natural ventilation system and a forced ventilation system, the crankcase natural ventilation system is also called as an open crankcase ventilation system, and the principle of the crankcase natural ventilation system is that the waste gas of the crankcase is directly discharged into the atmosphere; the positive crankcase ventilation system introduces the crankcase waste gas into the air inlet pipe of the engine, and then the crankcase waste gas is burnt in the cylinder, so that the pollutant emission can be reduced, and the economy of the engine is improved.
As shown in fig. 1, by using a forced ventilation system, if not controlled, oil vapor contained in the blow-by gas of the crankcase can be condensed along the way and adsorbed on parts of the air intake system, such as a supercharger c, an intercooler d, an air intake and exhaust valve, and the like, thereby reducing the working performance and the service life of the parts; in addition, the main components of the engine oil are heavy high molecular weight hydrocarbon and non-hydrocarbon mixture, and the engine oil is difficult to completely burn after being introduced into a combustion chamber, so that carbon smoke is easily generated, carbon deposit is formed in a cylinder b, the working performance of an engine a is reduced, the emission of harmful particulate matters is increased, a tail gas post processor is polluted, the performance of the engine a is reduced, and the service life of the engine oil is prolonged. Therefore, current forced ventilation systems require a crankcase breather to control the above process, the crankcase breather comprising an air-oil separator e and a pressure control valve f; the crankcase blowby gas is introduced into an inlet of the breather from a cylinder head cover, the gas is filtered by an oil-gas separator e and then is connected into an air inlet manifold, and the gas reenters the combustion process of the engine a before being introduced into an intercooler d. The oil-gas separator plays an extremely important role in a forced ventilation system, and the separation efficiency of the oil-gas separator directly influences the working performance, the emission performance and the service life of an engine. The pressure control valve is used for adjusting the pressure of the crankcase, so that the pressure in the crankcase is prevented from rising due to the blockage of the oil-gas separator; however, when the pressure control valve is opened, pollutants discharged by the engine can be obviously increased, and even the emission of the engine cannot reach the standard.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a breather with a crankcase pressure adjusting device and a diesel engine.
The invention is realized by the following technical scheme:
the invention relates to a breather with a crankcase pressure adjusting device, which comprises a gas mixing area, an oil-gas separation area and an oil return area which are sequentially arranged;
the gas mixing area is provided with a crankcase blow-by gas pipe and a flow guide piece; the crankcase blowby gas pipe is connected with a pressure adjusting device, and the pressure adjusting device is provided with a reduced flow passage at the part extending into the crankcase blowby gas pipe; the guide piece is provided with a plurality of guide vanes extending towards the oil-gas separation area;
the oil-gas separation area is provided with an oil-gas separator and a filtered gas outlet, and the guide vanes extend into a flow channel in the oil-gas separator;
the oil return area is provided with an oil return hole.
The pressure regulating device is filled with momentum gas.
In some technical schemes, the oil-gas separation area is provided with a drainage end cover at the tail end of a flow channel in the oil-gas separator, and the drainage end cover protrudes towards the direction of a flow guide piece in the flow channel; preferably, the protrusion is tapered, further preferably the protrusion is conical.
The gas mixing area comprises a breather end cover, and a crankcase blow-by gas pipe is fixed on the breather end cover; the oil-gas separation area comprises a respirator box body, and the oil-gas separator is fixed in the respirator box body; the respirator end cover and the respirator box body are fixedly connected and sealed, and are preferably screwed through a threaded sleeve.
Preferably, the crankcase blow-by gas tube is rotatable relative to the respirator end cap.
In some embodiments, the width of the guide vanes decreases gradually in the direction of extension of the guide.
Preferably, the flow guide part adopts a columnar structure; further preferably, a circular ring columnar structure is adopted, and the guide vanes are uniformly distributed along the circumferential direction.
The columnar structure is transversely provided with a supporting end cover, and the supporting end cover is abutted against the oil-gas separator and is fixed with the respirator box body in a sealing manner.
The invention relates to a diesel engine, which comprises the breather with the crankcase pressure adjusting device.
Technical effects
Compared with the prior art, the invention has the following technical effects:
1) a pressure adjusting device is added on a blow-by gas pipe of a crankcase, momentum gas with higher flow rate and pressure is introduced through the pressure adjusting device, and the flow rate of the momentum gas is further improved when the momentum gas flows through the reduction type flow passage; according to an ideal gas state equation: the P1V 1-P2V 2 causes the surrounding pressure to drop sharply at the high-flow-rate momentum gas at the reduced flow passage, a relative negative pressure zone is formed, and then the gas in the crankcase blowby gas pipe is driven to flow rapidly, the average pressure in the crankcase is reduced, so that the regulation of the pressure in the crankcase and the stable emission of the engine are realized; the problem of abnormal discharge caused by the adoption of a pressure control valve is avoided;
2) by adding the flow guide piece, the concentrated impact of the impurity-containing gas on a local area on the oil-gas separator is avoided, and the separation and filtration efficiency is improved;
3) by adding the drainage end cover, part of liquid drops which reach the surface of the filter element of the oil-gas separator and are intercepted are guided to the oil-gas separator again, the liquid drops penetrate through the oil-gas separator and then enter the oil return hole under the action of osmosis, accumulation of the liquid drops is avoided, mixed gas reaching the bottom of the oil-gas separator is guided to the filter element of the oil-gas separator, turbulent flow of the gas at the bottom of the oil-gas separator is avoided, and oil-gas separation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art forced air system;
FIG. 2 is a schematic view showing the structure of a breather with a crankcase pressure adjusting device in embodiment 1;
FIG. 3 is a schematic view of the structure of a flow guide in example 1;
FIG. 4 is a schematic view of the drainage end cap in example 1;
in the figure:
the system comprises an engine a, a cylinder b, a supercharger c, an intercooler d, an oil-gas separator e and a pressure control valve f;
the device comprises an upper end cover 1, a respirator end cover 2, a respirator box body 3, a flow guide piece 4, a flow guide end cover 5, a pressure adjusting device 6, a crankcase blowby gas pipe 7, a threaded sleeve 8, a sealing piece 9, a sealing ring 10, a filtering filter element 11, an oil return hole 12, a sealing ring 13, a filtered gas outlet 14, a side gas pipe 15, a respirator box body 16, a supporting end cover 41 and a flow guide vane 42.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Example 1
The embodiment relates to a diesel engine which is provided with a breather with a crankcase pressure adjusting device as shown in figure 2, wherein the breather with the crankcase pressure adjusting device comprises a gas mixing area, an oil-gas separation area and an oil return area which are sequentially arranged.
The gas mixing area includes respirator end cover 2, and respirator end cover 2 top is sealed through upper end cover 1, and upper end cover 1 design has two hangers of convenient dismantlement, improves the convenience that follow-up maintenance was changed, and respirator end cover 2 bottom and oil gas disengagement zone are sealed fixed, and 2 lateral walls of respirator end cover are preferred to be equipped with side trachea 15.
The side air pipe 15 is sleeved with the crankcase blow-by air pipe 7 and sealed by a sealing ring 13; the crankcase blowby gas pipe 7 and the side gas pipe 15 are provided with the buckles and the clamping groove structures which are arranged in pairs and are uniformly distributed in the circumferential direction, so that the assembly angle of the crankcase blowby gas pipe 7 and the side gas pipe 15 can be adjusted, the pipeline arrangement of different diesel engines is convenient, and the flexible installation is realized; the crankcase blowby gas pipe 7 is preferably provided with a pressure adjusting device 6 through ultrasonic welding, the pressure adjusting device 6 is provided with a reduced flow passage at the part extending into the crankcase blowby gas pipe 7, the pressure adjusting device 6 and the crankcase blowby gas pipe 7 are designed, calibrated and produced as a component, and the working efficiency can be greatly improved;
momentum gas is introduced into the pressure adjusting device 6, and crankcase blowby gas is introduced into the crankcase blowby gas pipe 7; through the design of the reduced flow passage on the pressure adjusting device 6, a relative negative pressure area is formed at the reduced flow passage to drive gas in the crankcase to rapidly flow out, and the pressure in the crankcase is adjusted by adjusting the momentum gas parameter; the momentum gas and the crankcase blowby gas are mixed in the breather end cover 2 to form an accelerating mixed gas, and then the accelerating mixed gas flows to the oil-gas separation area.
A flow guide part 4 is arranged in the end cover 2 of the respirator; the flow guide part 4 in the embodiment is preferably in a circular cylinder structure, as shown in fig. 3; the flow guide piece 4 is transversely provided with a supporting end cover 41, and the supporting end cover 41 is abutted against the respirator box body 16 and is sealed with the respirator box body 16 through a sealing ring 10;
the guide piece 4 is provided with a plurality of guide vanes 42 extending towards the oil-gas separation area, the width of the guide vanes 42 is gradually reduced in the extending direction, and the extending length of each guide vane 41 can be different; traditional oil and gas separator's structural design when entering into dispersion separation and filtering stage, the crankcase blowby can be under air current and pressure outlet effect, and the preferential selection filters in near pressure outlet's filtration filter core department, causes inhomogeneous the filtration to lead to local position to filter the filter core surface and contain a large amount of impurity, the too big problem of gas face velocity of flow appears, influences oil-gas separation's effect, and above-mentioned problem has been avoided in the design of water conservancy diversion spare 4, has improved separation and filterable efficiency.
The oil-gas separation area comprises an oil-gas separator, the oil-gas separator is provided with a filtering filter element 11 and a respirator box body 16, the respirator box body 16 and a respirator end cover 2 are preferably in threaded connection through a threaded sleeve 8, compared with the traditional screw connection, the disassembly and maintenance are more convenient, a filtered gas outlet 14 is formed in the respirator box body 16, the respirator box body 16 is contracted and gathered at the bottom of the oil-gas separation area to form an oil return area, and the oil return area is provided with an oil return hole 12;
the mixed gas composed of momentum gas and crankcase blowby gas passes through the filter element 11, most of impurities such as engine oil particles, soot and the like are filtered by the filter element 11, the filtered gas flows out of the filter gas outlet 14 to enter the air inlet system of the engine, and the filtered and deposited engine oil droplets flow back to the oil pan of the engine through the return hole 12 to participate in the lubrication of the engine again.
Considering that the filter element 11 intercepts a part of oil droplets on the gas inlet side, and in order to avoid accumulation of the droplets, a drainage end cover 5 is designed, as shown in fig. 4; the filtering filter element 11 is preferably fixed on the drainage end cover 5, the drainage end cover 5 is fixed on the respirator box body 16, and the drainage end cover 5 protrudes towards the direction of the flow guide piece 4 in the center of the filtering filter element 11 and is conical; when some liquid drops are accumulated, the liquid drops can permeate through the filtering filter element 11 under the driving of a hill and also flow back to the oil sump through the oil return hole 12; meanwhile, the design of the drainage end cover 5 has a gas drainage effect, so that the gas is prevented from generating turbulence when flowing at the bottom of the filtering filter element 11, and the gas reaching the bottom of the oil-gas separation area is guided to the filtering filter element.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A breather with a crankcase pressure adjusting device is characterized by comprising a gas mixing area, an oil-gas separation area and an oil return area which are sequentially arranged;
the gas mixing area is provided with a crankcase blow-by gas pipe and a flow guide piece; the crankcase blowby gas pipe is connected with a pressure adjusting device, and the pressure adjusting device is provided with a reduced flow passage at the part extending into the crankcase blowby gas pipe; the guide piece is provided with a plurality of guide vanes extending towards the oil-gas separation area;
the oil-gas separation area is provided with an oil-gas separator and a filtered gas outlet, and the guide vanes extend into a flow channel in the oil-gas separator;
the oil return area is provided with an oil return hole.
2. The breather of claim 1, wherein the pressure regulator is charged with momentum gas.
3. The breather with the crankcase pressure regulating device according to claim 1, wherein the oil-gas separation area is provided with a drainage end cap at the end of a flow passage in the oil-gas separator, and the drainage end cap protrudes towards the direction of the flow guide piece in the flow passage.
4. The breather with crankcase pressure adjustment device according to claim 1, wherein the gas mixing section includes a breather end cap to which the crankcase blow-by gas tube is secured; the oil-gas separation area comprises a respirator box body, and the oil-gas separator is fixed in the respirator box body; the respirator end cover and the respirator box body are fixedly connected and sealed.
5. The breather with the crankcase pressure regulating device according to claim 4, wherein the breather end cover and the breather box body are in threaded connection through a threaded sleeve.
6. The respirator with the crankcase pressure adjusting device according to claim 4, wherein the crankcase blowby gas pipe is fixed on the end cover of the respirator through paired buckles and clamping groove structures, and the buckles and the clamping groove structures are evenly distributed in the circumferential direction.
7. The breather of claim 1, wherein the width of the guide vanes decreases in a direction of extension of the flow guide.
8. The respirator with the crankcase pressure adjusting device according to claim 7, wherein the flow guide piece is of a circular cylindrical structure, and the flow guide blades are uniformly distributed along the circumferential direction.
9. The respirator with the crankcase pressure adjusting device according to claim 7, wherein the flow guide piece is of a cylindrical structure, a supporting end cover is transversely arranged on the cylindrical structure, and the supporting end cover abuts against the oil-gas separator and is fixed with the respirator box body in a sealing mode.
10. A diesel engine comprising a breather according to any one of claims 1 to 9 with a crankcase pressure regulating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910089232.1A CN111502800A (en) | 2019-01-30 | 2019-01-30 | Breather with crankcase pressure adjusting device and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910089232.1A CN111502800A (en) | 2019-01-30 | 2019-01-30 | Breather with crankcase pressure adjusting device and diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN111502800A true CN111502800A (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910089232.1A Pending CN111502800A (en) | 2019-01-30 | 2019-01-30 | Breather with crankcase pressure adjusting device and diesel engine |
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| Country | Link |
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| CN (1) | CN111502800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187583A (en) * | 2021-05-24 | 2021-07-30 | 扬州工业职业技术学院 | Turbocharger backflow structure and turbocharger thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090064103A (en) * | 2007-12-14 | 2009-06-18 | 현대자동차주식회사 | Closed crankcase ventilation apparatus |
| CN103906901A (en) * | 2011-10-31 | 2014-07-02 | 丰田自动车株式会社 | Ventilation control device for internal combustion engine |
| US20160138442A1 (en) * | 2014-11-14 | 2016-05-19 | Mahle International Gmbh | Crankcase ventilation apparatus |
| DE102015208906A1 (en) * | 2015-05-13 | 2016-11-17 | Mahle International Gmbh | Suction jet pump with variable nozzle geometry and crankcase ventilation device |
| CN205977307U (en) * | 2016-08-29 | 2017-02-22 | 浙江永钰过滤系统有限公司 | Drainage filter |
| CN108457721A (en) * | 2018-05-05 | 2018-08-28 | 烟台工程职业技术学院 | Diesel engine oil gas separating device |
| CN209586465U (en) * | 2019-01-30 | 2019-11-05 | 苏州达菲特过滤技术股份有限公司 | Respirator and diesel engine with crankcase pressure regulating device |
-
2019
- 2019-01-30 CN CN201910089232.1A patent/CN111502800A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090064103A (en) * | 2007-12-14 | 2009-06-18 | 현대자동차주식회사 | Closed crankcase ventilation apparatus |
| CN103906901A (en) * | 2011-10-31 | 2014-07-02 | 丰田自动车株式会社 | Ventilation control device for internal combustion engine |
| US20160138442A1 (en) * | 2014-11-14 | 2016-05-19 | Mahle International Gmbh | Crankcase ventilation apparatus |
| DE102015208906A1 (en) * | 2015-05-13 | 2016-11-17 | Mahle International Gmbh | Suction jet pump with variable nozzle geometry and crankcase ventilation device |
| CN205977307U (en) * | 2016-08-29 | 2017-02-22 | 浙江永钰过滤系统有限公司 | Drainage filter |
| CN108457721A (en) * | 2018-05-05 | 2018-08-28 | 烟台工程职业技术学院 | Diesel engine oil gas separating device |
| CN209586465U (en) * | 2019-01-30 | 2019-11-05 | 苏州达菲特过滤技术股份有限公司 | Respirator and diesel engine with crankcase pressure regulating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187583A (en) * | 2021-05-24 | 2021-07-30 | 扬州工业职业技术学院 | Turbocharger backflow structure and turbocharger thereof |
| CN113187583B (en) * | 2021-05-24 | 2024-01-30 | 扬州工业职业技术学院 | Turbocharger reflux structure and turbocharger thereof |
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