CN111022151A - Crankcase ventilation system of heavy natural gas engine - Google Patents
Crankcase ventilation system of heavy natural gas engine Download PDFInfo
- Publication number
- CN111022151A CN111022151A CN202010013437.4A CN202010013437A CN111022151A CN 111022151 A CN111022151 A CN 111022151A CN 202010013437 A CN202010013437 A CN 202010013437A CN 111022151 A CN111022151 A CN 111022151A
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- CN
- China
- Prior art keywords
- gas
- blow
- communicated
- oil
- ventilation system
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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.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000009423 ventilation Methods 0.000 title claims abstract description 19
- 239000003345 natural gas Substances 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 76
- 239000002912 waste gas Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000010705 motor oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method 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
- F01M13/04—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
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- 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
- F01M2013/0472—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil using heating means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention aims to provide a crankcase ventilation system of a heavy natural gas engine, which can effectively reduce the emission of waste gas and effectively reduce the pollution to the environment. Comprises an oil-gas separator; one end of the blow-by gas collecting pipe I is communicated with the crankcase and used for collecting blow-by gas of the crankcase, and the other end of the blow-by gas collecting pipe I is communicated with the inlet end of the oil-gas separator; and one end of the blow-by gas collecting pipe II is communicated with the air outlet end of the oil-gas separator, and the other end of the blow-by gas collecting pipe II is communicated with the supercharger.
Description
Technical Field
The invention relates to a closed crankcase ventilation system, in particular to a crankcase ventilation system of a heavy natural gas engine.
Background
At present, for heavy engines, most of the heavy engines adopt an open crankcase ventilation system, blowby gas in an engine crankcase is separated from oil mist by an oil-gas separator, separated oil returns to an oil pan through an oil outlet, and separated blowby gas is directly discharged to the atmosphere through an air outlet.
Disclosure of Invention
The invention aims to provide a crankcase ventilation system of a heavy natural gas engine, which can effectively reduce the emission of waste gas and effectively reduce the pollution to the environment.
The invention is realized by the following technical scheme:
a crankcase ventilation system of a heavy natural gas engine comprises an oil-gas separator; one end of the blow-by gas collecting pipe I is communicated with the crankcase and used for collecting blow-by gas of the crankcase, and the other end of the blow-by gas collecting pipe I is communicated with the inlet end of the oil-gas separator; and one end of the blow-by gas collecting pipe II is communicated with the air outlet end of the oil-gas separator, and the other end of the blow-by gas collecting pipe II is communicated with the supercharger.
Furthermore, pressure sensors are arranged on the blow-by gas collecting pipe I and the blow-by gas collecting pipe II.
Furthermore, the air purifier also comprises an air inlet hose, wherein one end of the air inlet hose is communicated with the air filter, and the other end of the air inlet hose is communicated with the supercharger; and the tail end of the blow-by gas collecting pipe II is communicated with the side wall of the air inlet hose.
Furthermore, the device also comprises an auxiliary air inlet pipe, wherein one end of the auxiliary air inlet pipe is communicated with the supercharger, and the other end of the auxiliary air inlet pipe is communicated with the oil-gas separator.
Further, the whole system is arranged at the hot end of the engine.
Compared with the prior art, the invention has the following beneficial effects:
1. aiming at the problem that blow-by waste gas in a crankcase of a heavy gas vehicle is directly discharged into the atmosphere, the waste gas in the crankcase is efficiently separated by an oil-gas separator and then is introduced into the front end of a supercharger to be re-introduced into an engine along with fresh air for combustion, so that the problem that the blow-by waste gas is directly discharged into the atmosphere is avoided, and the pollution to the environment is reduced;
2. pressure sensors are arranged at the front end and the rear end of the oil-gas separator, so that the on-off of a pipeline can be timely judged, and the pipeline can be timely maintained when leakage occurs;
3. by utilizing the Venturi effect, negative pressure is formed after the air inlet hose is introduced with air flow, so that the accuracy of disconnection judgment of the pressure sensor can be improved, a vacuum area can be formed at the tail end of the blow-by gas collecting pipe II, the collection of blow-by gas is accelerated, and the auxiliary effect on maintaining the negative pressure of the crankcase is achieved;
4. the whole system is arranged at the hot end of the engine, the reasonable distance design is adopted, and the environmental temperature of the system is controlled to be between 100 ℃ and 120 ℃, so that the moisture is prevented from being separated out along with the oil mist and returning to the oil pan, and the generation of engine oil emulsion is avoided. In addition, the problem that the air outlet pipeline of the oil-gas separator is easy to freeze can be well solved; the whole system utilizes the heat of the engine on the premise of not adding heating equipment, solves the oil emulsification and icing conditions of a ventilation system, reduces the power loss of the engine, saves energy and reduces emission;
5. the whole system of the invention has compact structure, high flexibility and strong universality, and reduces the production cost and the use cost.
Drawings
FIG. 1 is a schematic view of the general operating principle of the crankcase ventilation system according to the invention;
FIG. 2 is a schematic view of a crankcase ventilation system component according to the invention;
FIG. 3 is a schematic view of the air intake hose of the present invention;
in the figure: 1. the device comprises an oil-gas separator, 2, a supercharger, 3, blow-by gas collecting pipes I and 4, blow-by gas collecting pipes II and 5, an air inlet hose, 6, an auxiliary air inlet pipe, 7, a pressure sensor, 8 and an air filter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the embodiments described herein are merely for the purpose of illustrating the invention and for the purpose of making the same more clear and concise the objects, aspects and advantages of the invention, and the detailed description of the invention will be made with reference to the drawings and the embodiments.
As shown in figures 1-3, the invention provides a crankcase ventilation system of a heavy natural gas engine, which mainly comprises an oil-gas separator 1, a supercharger 2, a blow-by gas collecting pipe I3, a blow-by gas collecting pipe II 4, an air inlet hose 5 and an auxiliary air inlet pipe 6. One end of the blowby gas collecting pipe I3 is communicated with the crankcase and used for collecting blowby gas of the crankcase, and the other end is communicated with the inlet end of the oil-gas separator 1. The head end of the blow-by gas collecting pipe II 4 is communicated with the air outlet end of the oil-gas separator 1. And pressure sensors 7 are respectively arranged on the front end blowby gas collecting pipe I3 and the rear end blowby gas collecting pipe II 4 of the oil-gas separator 1. One end of the air inlet hose 5 is communicated with the air filter 8, the other end of the air inlet hose is communicated with the supercharger 2, the tail end of the blow-by gas collecting pipe II 4 is communicated with the side wall of the air inlet hose 5, a vacuum area is formed at the tail end of the blow-by gas collecting pipe II 4 by utilizing the Venturi effect, the blow-by gas is adsorbed, the collection of the blow-by gas is accelerated, and the auxiliary effect is maintained on the negative pressure of the crankcase. One end of the auxiliary air inlet pipe 6 is communicated with the air outlet of the supercharger 2, the other end of the auxiliary air inlet pipe is communicated with the oil-gas separator 1, gas under certain pressure is introduced into the oil-gas separator 1, and the separation efficiency of the oil-gas separator 1 is improved.
The hydrogen-carbon ratio of the natural gas engine is high, the blow-by gas contains a large amount of moisture, the moisture is easily condensed into water drops, the water drops are separated by the oil-gas separator and return to the oil pan to accelerate the aging of engine oil, and the water drops are easily frozen in winter to block an air outlet pipeline, so that the pressure of a crankcase is too high. Meanwhile, the blowby gas contains a large amount of oil mist, and water and oil are easy to generate irreversible emulsion at low temperature, so that the whole system fails. The electric heating or water heating is adopted in the market, so that the power of the engine is consumed, and the design and use cost is increased. When the system is designed and installed, the whole system is arranged at the hot end of the engine, heat insulation equipment in the conventional technology is skillfully selected, and the temperature of the system is controlled between 100 ℃ and 120 ℃, so that the condensation of water vapor is avoided.
The crankcase ventilation system provided by the invention specifically works as follows:
fresh air is filtered by an air filter, is pressurized by a supercharger 2 and then enters the engine to be supplied with fuel for combustion. The majority of the combusted exhaust gas is discharged, and a small portion enters the engine body, which is called crankcase blowby gas. The blow-by gas contains natural gas, engine oil, water vapor, exhaust gas, and the like. In order to avoid overhigh internal pressure of the engine, the system leads out blow-by gas through the blow-by gas collecting pipe I, separates engine oil in the blow-by gas through the oil-gas separator 1, leads the engine oil to the front end of the supercharger 2 through the blow-by gas collecting pipe II and the air inlet hose, and enters the engine again along with fresh air to be combusted. The oil separated by the oil-gas separator 1 returns to the oil level below the oil level in the oil sump. There are two pressure sensor among the entire system for judge the system pipeline disconnection condition, avoid the pipeline disconnection, waste gas directly gets into the atmosphere through not handling, in case there is the pipeline disconnection, the warning will take place for the pilot lamp in the driver's cabin, produces the limit after reaching the certain time and turns round, reminds the user in time to inspect and maintain.
Claims (5)
1. A crankcase ventilation system of a heavy natural gas engine is characterized by comprising a crankcase ventilation system,
an oil-gas separator;
one end of the blow-by gas collecting pipe I is communicated with the crankcase and used for collecting blow-by gas of the crankcase, and the other end of the blow-by gas collecting pipe I is communicated with the inlet end of the oil-gas separator;
and one end of the blow-by gas collecting pipe II is communicated with the air outlet end of the oil-gas separator, and the other end of the blow-by gas collecting pipe II is communicated with the supercharger.
2. The crankcase ventilation system of claim 1, wherein pressure sensors are disposed on both the blow-by gas collection tube i and the blow-by gas collection tube ii.
3. The crankcase ventilation system according to claim 2, further comprising an air intake hose, wherein one end of the air intake hose is communicated with the air cleaner, and the other end of the air intake hose is communicated with the supercharger; and the tail end of the blow-by gas collecting pipe II is communicated with the side wall of the air inlet hose.
4. The crankcase ventilation system according to claim 3, further comprising an auxiliary air inlet pipe, wherein one end of the auxiliary air inlet pipe is communicated with the supercharger, and the other end of the auxiliary air inlet pipe is communicated with the oil-gas separator.
5. The crankcase ventilation system according to any one of claims 1-4, wherein the entire system is arranged at the hot end of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013437.4A CN111022151A (en) | 2020-01-07 | 2020-01-07 | Crankcase ventilation system of heavy natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013437.4A CN111022151A (en) | 2020-01-07 | 2020-01-07 | Crankcase ventilation system of heavy natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022151A true CN111022151A (en) | 2020-04-17 |
Family
ID=70202375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010013437.4A Pending CN111022151A (en) | 2020-01-07 | 2020-01-07 | Crankcase ventilation system of heavy natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022151A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177708A (en) * | 2020-09-30 | 2021-01-05 | 山西凯嘉煤层气发电有限公司 | Gas blow-by recovery system of gas generator set crankcase and control method thereof |
| CN115182804A (en) * | 2022-07-12 | 2022-10-14 | 东风康明斯发动机有限公司 | Engine closed crankcase breathing system and air-driven breathing method |
| EP4148240A1 (en) * | 2021-09-14 | 2023-03-15 | 2G Energy AG | Stationary gas engine with a ventilation assembly for ventilation of a crankcase |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269030A (en) * | 2011-06-23 | 2011-12-07 | 潍柴动力股份有限公司 | Oil-gas separator and crankcase blow-by amount detection control system with same |
| US20120285425A1 (en) * | 2011-05-13 | 2012-11-15 | GM Global Technology Operations LLC | Blowby flow control system for a turbocharged engine |
| DE102013206819A1 (en) * | 2012-04-19 | 2013-10-24 | Ford Global Technologies, Llc | METHOD FOR DETERMINING A CRANKSHAFT DAMAGE AND OIL LEVEL |
| US20130306043A1 (en) * | 2012-05-17 | 2013-11-21 | GM Global Technology Operations LLC | Positive crankcase ventilation system |
| CN106194331A (en) * | 2016-09-30 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of engine with supercharger crankcase ventilation system |
| CN110646209A (en) * | 2019-09-25 | 2020-01-03 | 一汽解放汽车有限公司 | Closed crankcase ventilation system OBD detection device |
-
2020
- 2020-01-07 CN CN202010013437.4A patent/CN111022151A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120285425A1 (en) * | 2011-05-13 | 2012-11-15 | GM Global Technology Operations LLC | Blowby flow control system for a turbocharged engine |
| CN102269030A (en) * | 2011-06-23 | 2011-12-07 | 潍柴动力股份有限公司 | Oil-gas separator and crankcase blow-by amount detection control system with same |
| DE102013206819A1 (en) * | 2012-04-19 | 2013-10-24 | Ford Global Technologies, Llc | METHOD FOR DETERMINING A CRANKSHAFT DAMAGE AND OIL LEVEL |
| US20130306043A1 (en) * | 2012-05-17 | 2013-11-21 | GM Global Technology Operations LLC | Positive crankcase ventilation system |
| CN106194331A (en) * | 2016-09-30 | 2016-12-07 | 奇瑞汽车股份有限公司 | A kind of engine with supercharger crankcase ventilation system |
| CN110646209A (en) * | 2019-09-25 | 2020-01-03 | 一汽解放汽车有限公司 | Closed crankcase ventilation system OBD detection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177708A (en) * | 2020-09-30 | 2021-01-05 | 山西凯嘉煤层气发电有限公司 | Gas blow-by recovery system of gas generator set crankcase and control method thereof |
| EP4148240A1 (en) * | 2021-09-14 | 2023-03-15 | 2G Energy AG | Stationary gas engine with a ventilation assembly for ventilation of a crankcase |
| CN115182804A (en) * | 2022-07-12 | 2022-10-14 | 东风康明斯发动机有限公司 | Engine closed crankcase breathing system and air-driven breathing method |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |