CN204457936U - The crankcase closed system of ventilation - Google Patents
The crankcase closed system of ventilation Download PDFInfo
- Publication number
- CN204457936U CN204457936U CN201420823597.5U CN201420823597U CN204457936U CN 204457936 U CN204457936 U CN 204457936U CN 201420823597 U CN201420823597 U CN 201420823597U CN 204457936 U CN204457936 U CN 204457936U
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- China
- Prior art keywords
- main separator
- preseparator
- air outlet
- section
- suction port
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Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 19
- 238000005204 segregation Methods 0.000 claims abstract description 12
- 230000033228 biological regulation Effects 0.000 claims description 36
- 238000001914 filtration Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 29
- 238000000926 separation method Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a kind of crankcase closed system of ventilation, comprise preseparator and main separator, preseparator suction port and preseparator air outlet are oppositely arranged, preseparator comprises segregation section and supercharging section, the outer end of segregation section is provided with preseparator suction port, the outer end of supercharging section is provided with preseparator air outlet and is connected with preseparator steam outlet pipe at preseparator air outlet place, preseparator is provided with preseparator return opening bottom it, preseparator return opening is connected with the first return tube, the other end of preseparator steam outlet pipe is connected with main separator suction port, filter core is provided with in main separator, main separator is provided with main separator suction port and main separator air outlet, main separator air outlet place is connected with main separator steam outlet pipe, main separator correspondence filter ante-chamber is provided with the first pressure regulator valve, main separator correspondence filter back cavity is provided with the second pressure regulator valve, the bottom of main separator is provided with main separator return opening, and main separator return opening is connected with the second return tube.
Description
Technical field
The utility model relates to a kind of crankcase closed system of ventilation.
Background technique
For commercial diesel, state four Abgasgesetz is being implemented due to domestic at present, the discharge of this regulation to deaerator part does not do clear stipulaties, therefore present stage diesel engine crankcase ventilation be mostly open type, namely the waste gas in crankcase, after the simple separation through Oil-gas Separation, directly enters air.This technological scheme there is no too high requirement for the separation effect of deaerator, as long as oil consumption is within the tolerance interval of user.
Along with country is to the progressively raising of emission request, crankcase open-circuit ventilation can upgrade to enclosed sooner or later and ventilate.Implement the problem that higher levels of emission standard is the time, this technological scheme can become history eventually.Research new technology becomes trend of the times, the inevitable direction of historical development.
Have part producer to ventilate in research crankcase enclosed at present, but its scheme is the suction tude that the simple steam outlet pipe by deaerator takes back diesel engine, as shown in Figure 1.For this kind of situation, because the ventilation of crankcase enclosed can have influence on all many-sides such as power character, Economy, reliability of complete machine, therefore simple pipeline connection can not meet usage requirement, and its effect is also self-evident.Make a concrete analysis of as follows:
1, owing to only there being one-level to be separated, rationally be not separated distribution for oil droplet size, an only simple deaerator of giving has gone, therefore the burden of deaerator is large, a lot of oil gas has little time to be separated and is just taken out of (being similar to the anti-game of tower), the separation effect of deaerator has reduction clearly, and this process is irreversible, cause oil content in the waste gas after being separated high, this can cause the problem of two aspects: on the one hand, can reduce the efficiency of pressurized machine, affect power character and the Economy of complete machine, pressurized machine is fragile; On the other hand, consumption of lubricating oil is too high.
2, deaerator burden is large, and the another one problem caused is exactly the service life reduction of deaerator, and too much Impurity deposition, in deaerator, results in blockage, and maintenance cost raises, poor stability.
3, steam outlet pipe line arrangement is unreasonable, itself also have the continuous condensation of oil in the process that oil gas flows in pipeline and be adsorbed on wall, for this part oil, best processing mode makes it along pipeline retrograde flow oil return gas separating device, then flows back to oil sump by the return tube of deaerator.Otherwise, the two problems described in " 1 " can be caused.Therefore reasonably line arrangement will directly affect the trend of this part oil, because this part is too common, easily out in the cold on the contrary.
Generally speaking, although this scheme achieves enclosed connection in appearance, because the burden of deaerator is large, separation effect is low, line arrangement is unreasonable, and causing, in diesel engine real-world operation process, has king-sized harm to overall performance and other component.Therefore the program can only carry out of short duration test in test room, still can not be referred to as ripe technology.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of crankcase closed system of ventilation.
For solving the problems of the technologies described above, the utility model comprises the preseparator and main separator that are equipped with suction port and air outlet, it is characterized in that described preseparator suction port and preseparator air outlet are oppositely arranged, described preseparator comprises the supercharging section that its internal diameter increases the segregation section in bell mouth shape gradually and is connected with segregation section maximum inner diameter end, the outer end of described segregation section is provided with preseparator suction port, the outer end of described supercharging section is provided with preseparator air outlet and is connected with preseparator steam outlet pipe at preseparator air outlet place, described preseparator is provided with preseparator return opening bottom it, described preseparator return opening is connected with the first return tube, the other end of described preseparator steam outlet pipe is connected with main separator suction port, the filter core its inner chamber being divided into filter ante-chamber and filter back cavity is provided with in described main separator, described main separator is provided with and filters the main separator suction port that ante-chamber is communicated with and the main separator air outlet be communicated with filter back cavity, main separator air outlet place is connected with main separator steam outlet pipe, described main separator correspondence filter ante-chamber is provided with the first pressure regulator valve, described main separator correspondence filter back cavity is provided with the second pressure regulator valve, the bottom of described main separator is provided with main separator return opening, and described main separator return opening is connected with the second return tube.
Described main separator comprises the main body of tubular vertical setting, described filter core and main body are coaxially set, the top of described main body is connected with air inlet pressure regulation section, the sidepiece of described air inlet pressure regulation section is provided with main separator suction port, the top of described air inlet pressure regulation section is fixed with the end plate closed, described end plate offers air outlet hole, described air outlet hole is provided with the first pressure regulator valve air outlet hole can opened when cavity pressure is greater than specified value before filtering, the top of described air inlet pressure regulation section is provided with end cap, is provided with gap of giving vent to anger between described end cap and air inlet section pressure regulation section; The sidepiece of described main body is connected with pressure regulation section of giving vent to anger, described sidepiece of giving vent to anger pressure regulation section is provided with main separator air outlet, described end of giving vent to anger pressure regulation section is provided with closing cap, described closing cap offers vent, described in give vent to anger to be provided with in pressure regulation section when after filtering, cavity pressure is normal, vent is closed, hypotony time the second pressure regulator valve that main separator air outlet can be closed.
Described first pressure regulator valve comprises the connecting rod inserting air outlet hole, the two ends of air outlet hole are all stretched out at the two ends of described connecting rod, the two ends up and down of described connecting rod are connected to upper plate and the lower plate that its minimum dimension is all greater than air outlet hole internal diameter, and the bar section between described crankpin end plate and lower plate is set with Returnning spring.
Described second pressure regulator valve comprises its outer surface and can fit with air outlet thus the valve body closed air outlet, and the outer end of described valve body is provided with the ring-type limiting board can fitted with closing cap internal surface, is set with the spring that can be pressed on closing cap in described valve body.
Described supercharging section cylindrically, described return opening is arranged on the bottom of supercharging section, is provided with sieve plate in described supercharging section, and bottom and the supercharging section internal surface of described sieve plate had oil-gap, described sieve plate is evenly equipped with multiple sieve aperture, and described sieve aperture is distributed in the outside that air outlet projects at sieve plate.
Described preseparator is provided with flange at its suction port place.
Described main separator is fixed with mounting bracket.
Described main separator steam outlet pipe is upwards bent to form inverted U-shaped successively successively, and is obliquely installed.
The closing cap of described pressure regulation section of giving vent to anger is provided with safety cover, safety cover offers air passing hole.
After adopting said structure, the second-order separation mode that the utility model have employed " pre-separation+main separation ".In crankcase, the concentration of fuel-air mixture is higher, olesome not of uniform size, and because most olesome is larger, easily separated, this part oil droplet can complete separation very easily in preseparator.Remain less, the difficult oil droplet be separated of a small amount of particle, continue through main separator and be separated, the two division of labor is clear and definite, has both reduced the work load of main separator, and has turn improved efficiency, and improve the working life of main separator.Have employed pre-separation and be separated the scheme of separating oil return with main, prevent from, by main for oil gas separator " short circuit ", causing separation effect to decline, consumption of lubricating oil increases, and endangers other component.Preseparator suction port place changes flange arrangement into, can be fixed on air hatch very convenient and reliably.This structure well solves the potential failure risk caused because of clashing and breaking.There are the first pressure regulator valve and the second pressure regulator valve in main separator, crankcase pressure can be made to maintain normal range (NR).Under avoiding extreme case, crankcase pressure is too high or too low, causes collateral damage to other component.The trend of main separator steam outlet pipe is parabolic structure, and high namely, both sides are low.Can effectively avoid oil to enter in the suction tude of diesel engine by main separator steam outlet pipe like this, simultaneously owing to being tilt, the inwall of main separator steam outlet pipe can not trapped fuel, remains the state of relative clean, can not affect the circulation of mixed gas.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the utility model is described in further detail:
Fig. 1 is the structural representation of prior art;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the structural representation of preseparator;
Fig. 4 is the sectional structure schematic diagram of Fig. 3;
Fig. 5 is the structural representation of sieve plate
Fig. 6 is the structural representation of main separator.
Embodiment
As shown in Figures 2 to 6, the crankcase closed system of ventilation comprises the preseparator 1 and main separator 5 that are connected by pipeline.Preseparator suction port 13 and preseparator air outlet 14 are oppositely arranged, preseparator 1 comprises the supercharging section 19 that its internal diameter increases the segregation section 12 in bell mouth shape gradually and is connected with segregation section 12 maximum inner diameter end, in the outer end of segregation section 12 and Fig. 3, left end is provided with preseparator suction port 13 and is provided with at this suction port place for fixing flange 11, in the outer end of supercharging section 19 and Fig. 3, right-hand member is provided with preseparator air outlet 14 and is connected with preseparator steam outlet pipe 2 at preseparator air outlet 14 place, supercharging section 19 cylindrically, return opening is arranged on the bottom of supercharging section 19, preseparator return opening is connected with the first return tube 3, the other end of preseparator steam outlet pipe 2 is connected with main separator 5 suction port.Rounded sieve plate 15 is installed in supercharging section 19, sieve plate 15 is arranged near preseparator air outlet 14 place, the bottom of sieve plate 15 is provided with breach 18 thus makes there was oil-gap between sieve plate 15 and supercharging section 19 internal surface, sieve plate 15 is evenly equipped with multiple sieve aperture 17, sieve aperture 17 is distributed in the outside that preseparator air outlet 14 projects at sieve plate 15, and namely sieve plate 15 does not just offer sieve aperture 17 to air outlet place.
Main separator 5 outer surface is fixed with mounting bracket 4, main separator 5 comprises the main body of tubular vertical setting, the filter core 56 its inner chamber being divided into filter ante-chamber and filter back cavity is provided with in main body, filter core 56 and main body are coaxially set, the main separator air outlet 59 that main separator 5 is provided with main separator suction port 61 and is communicated with filter back cavity, main separator air outlet 59 place is connected with main separator steam outlet pipe 7, main separator 5 correspondence filter ante-chamber is provided with the first pressure regulator valve, main separator 5 correspondence filter back cavity is provided with the second pressure regulator valve, the bottom of main separator 5 is provided with main separator return opening, main separator return opening is connected with the second return tube 6.Main separator steam outlet pipe 7 is upwards bent to form inverted U-shaped successively successively, namely in the middle of, high both sides are low, oil can be effectively avoided to enter in the suction tude of diesel engine by main separator steam outlet pipe 7 like this, simultaneously owing to being obliquely installed, the inwall of main separator steam outlet pipe 7 can not trapped fuel, remain the state of relative clean, the circulation of mixed gas can not be affected.Main separator steam outlet pipe 7 also can only directly be arranged obliquely, as long as to ensure in it not trapped fuel.
The top of main body is connected with air inlet pressure regulation section 51, namely air inlet pressure regulation section 51 is communicated with filter ante-chamber with the inner space of filter core 56, air inlet pressure regulation section 51 also cylindrically, the sidepiece of air inlet pressure regulation section 51 is provided with and the main separator suction port 61 filtered ante-chamber and be communicated with, the top of air inlet pressure regulation section 51 is fixed with the end plate 52 lower cavity closed, the central authorities of end plate 52 offer air outlet hole 57, air outlet hole 57 is provided with the first pressure regulator valve air outlet hole 57 can opened when cavity pressure is greater than specified value before filtering, first pressure regulator valve comprises the connecting rod 83 inserting air outlet hole 57, the two ends of air outlet hole 57 are all stretched out at the two ends of connecting rod 83, the two ends up and down of connecting rod 83 are connected to upper plate 81 and the lower plate 82 that its minimum dimension is all greater than air outlet hole 57 internal diameter, the bar section of connecting rod 83 between end plate 52 and lower plate 82 is set with Returnning spring 84.The top of air inlet pressure regulation section 51 is provided with end cap 53, is provided with gap of giving vent to anger between end cap 53 and air inlet pressure regulation section 51, and in the present embodiment, end cap 53 is installed on the top of air inlet pressure regulation section 51.
The sidepiece of main body is connected with pressure regulation section 54 of giving vent to anger, give vent to anger pressure regulation section 54 also cylindrically, its axis and main body axis are also mutually vertical in same plane, the sidepiece of pressure regulation section 54 of giving vent to anger is provided with main separator air outlet 59, the right part of pressure regulation section 54 of giving vent to anger is provided with closing cap 60, the central authorities of closing cap 60 offer vent 62, are provided with the second pressure regulator valve main separator air outlet 59 can closed when cavity pressure is too low after filtering in pressure regulation section 54 of giving vent to anger.Second pressure regulator valve comprises its outer surface and can fit with air outlet thus the valve body 64 closed air outlet, the outer end of valve body 64 and right-hand member are provided with the ring-type limiting board 65 can fitted with closing cap 60 internal surface, the annular groove of its right part opening is provided with in valve body 64, be set with the spring 63 that can be pressed on closing cap 60 in annular groove, the right-hand member of valve body 64 can insert in vent 62.The right side of pressure regulation section 54 of giving vent to anger is provided with safety cover 55, and safety cover 55 offers air passing hole.Safety cover 55 pairs of closing caps 60 shield.
First return tube 3 or the second return tube 6 can be connected directly between on the back leakage connection of oil dipstick tube increase, neither affect the function of dipstick itself, turn increase the function of oil return, avoid on body, find oil return interface and may cause be difficult to arrange problem, this features simple structure is easy, and cost is low.First return tube 3 or the second return tube 6 also can extend in oil sump respectively; Also on the second return tube 6, one-way valve can be installed, then the first return tube 3 and the second return tube 6 are connected to total return tube, more total return tube be received oil sump machine oil oil level once afterwards; Also the second return tube 6 can be connected U-shaped pipe, U-shaped pipe and the first return tube 3 are connected to total return tube, more total return tube are received oil sump machine oil oil level once afterwards.Aforementioned several structure mainly makes machine oil unidirectionally can only flow to oil sump, and the mixed gas in crankcase does not oppositely flow back in correlated parts by this passage, and other similar structure all can complete object of the present invention.
Fuel-air mixture enters preseparator 1 by preseparator suction port 13, because the segregation section 12 of preseparator 1 is in bell mouth shape, fuel-air mixture is in the process of flowing, pressure can raise gradually, the oil droplet that some particle is larger, under the effect of this pressure and gravity, first can separate, and flow out through preseparator return opening along wall.The sieve aperture 17 of mixed gas on sieve plate 15 accelerates subsequently, and impinge upon on the outer wall on the right side of preseparator 1, a part of oil droplet is separated again, and along under wall flow, the breach eventually passed through below sieve plate 15 flows back to return opening.Fuel-air mixture after separation flows out through air outlet, because sieve aperture 17 is distributed in sieve plate 15 around, namely the intermediate portion of sieve plate 15 does not just have sieve aperture 17 to preseparator air outlet 14 place, therefore mixed gas just must can enter into preseparator air outlet 14 through the sieve aperture 17 of surrounding, improves separation effect.Fuel-air mixture enters main separator 5 through preseparator steam outlet pipe 2, and after filter core 56 filters, isolated oil flows back to oil sump by main separator return opening, and the air-flow after separation is to main separator steam outlet pipe 7.This main separator 5 has voltage regulation function, when filter core 56 too much blocks because of impurity, pressure in main separator 5 constantly raises, when reaching set upper limit value, the lower end surface of the first pressure regulator valve lower plate 82 is greater than spring pressure by gas pressure, air outlet hole 57 is opened by Compress Spring, and fuel-air mixture directly enters air through air outlet hole 57, and now crankcase pressure also decreases.Because this ventilation system is enclosed, crankcase communicates with suction tude, during engine operation, is negative pressure, when negative pressure value is larger, crankcase pressure can be caused too low in suction tude.Now because atmospheric pressure is greater than crankcase pressure, when crankcase pressure is lower than limit value, the second pressure regulator valve is moved to the left and is blocked main separator air outlet 59 under the effect of pressure reduction.First pressure regulator valve and the second pressure regulator valve common guarantee crankcase pressure maintain between stable scope.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model.Previous embodiment has been described in detail the utility model, and for a person skilled in the art, it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.In every case, within inventive concept scope of the present utility model, any amendment made, equivalent replacement, improvement etc., be all included within protection domain of the present utility model.
Claims (9)
1. a crankcase closed system of ventilation, comprise the preseparator (1) and main separator (5) that are equipped with suction port and air outlet, it is characterized in that described preseparator suction port (13) and preseparator air outlet (14) are oppositely arranged, described preseparator (1) comprises the supercharging section (19) that its internal diameter increases the segregation section (12) in bell mouth shape gradually and is connected with segregation section (12) maximum inner diameter end, the outer end of described segregation section (12) is provided with preseparator suction port (13), the outer end of described supercharging section (19) is provided with preseparator air outlet (14) and is connected with preseparator steam outlet pipe (2) at preseparator air outlet (14) place, described preseparator (1) is provided with preseparator return opening bottom it, described preseparator return opening is connected with the first return tube (3), the other end of described preseparator steam outlet pipe (2) is connected with main separator suction port, the filter core (56) its inner chamber being divided into filter ante-chamber and filter back cavity is provided with in described main separator (5), described main separator (5) is provided with and filters the main separator suction port (61) that ante-chamber is communicated with and the main separator air outlet (59) be communicated with filter back cavity, main separator air outlet (59) place is connected with main separator steam outlet pipe, described main separator (5) correspondence filter ante-chamber is provided with the first pressure regulator valve, described main separator (5) correspondence filter back cavity is provided with the second pressure regulator valve, the bottom of described main separator (5) is provided with main separator return opening, described main separator return opening is connected with the second return tube (58).
2. the crankcase closed system of ventilation according to claim 1, it is characterized in that described main separator (5) comprises the main body of tubular vertical setting, described filter core (56) and main body are coaxially set, the top of described main body is connected with air inlet pressure regulation section (51), the sidepiece of described air inlet pressure regulation section (51) is provided with main separator suction port (61), the top of described air inlet pressure regulation section (51) is fixed with the end plate (52) closed, described end plate (52) offers air outlet hole (57), described air outlet hole (57) is provided with the first pressure regulator valve air outlet hole (57) can opened when cavity pressure is greater than specified value before filtering, the top of described air inlet pressure regulation section (51) is provided with end cap (53), gap of giving vent to anger is provided with between described end cap (53) and air inlet pressure regulation section (51), the sidepiece of described main body is connected with pressure regulation section (54) of giving vent to anger, described sidepiece of giving vent to anger pressure regulation section (54) is provided with main separator air outlet (59), described end of giving vent to anger pressure regulation section (54) is provided with closing cap (60), described closing cap (60) offers vent (62), described in give vent to anger to be provided with in pressure regulation section (54) when after filtering, cavity pressure is normal, vent (62) is closed, hypotony time the second pressure regulator valve that main separator air outlet (59) can be closed.
3. the crankcase closed system of ventilation according to claim 2, it is characterized in that described first pressure regulator valve comprises the connecting rod (83) inserting air outlet hole (57), the two ends of air outlet hole (57) are all stretched out at the two ends of described connecting rod (83), the two ends up and down of described connecting rod (83) are connected to upper plate (81) and the lower plate (82) that its minimum dimension is all greater than air outlet hole (57) internal diameter, and the bar section of described connecting rod (83) between end plate (52) and lower plate (82) is set with Returnning spring (84).
4. the crankcase closed system of ventilation according to claim 2, it is characterized in that described second pressure regulator valve comprises its outer surface and can fit with main separator air outlet (59) thus the valve body main separator air outlet (59) closed, the outer end of described valve body is provided with the ring-type limiting board (65) can fitted with closing cap (60) internal surface, is set with the spring (63) that can be pressed on closing cap (60) in described valve body.
5. the crankcase closed system of ventilation according to claim 1, it is characterized in that described supercharging section (19) cylindrically, described preseparator return opening is arranged on the bottom of supercharging section (19), in described supercharging section (19), sieve plate (15) is installed, bottom and supercharging section (19) internal surface of described sieve plate (15) had oil-gap, described sieve plate (15) is evenly equipped with multiple sieve aperture (17), described sieve aperture (17) is distributed in the outside that air outlet projects at sieve plate (15).
6. the crankcase closed system of ventilation according to any one of claim 1 to 5, is characterized in that described preseparator is provided with flange (11) at its suction port place.
7. the crankcase closed system of ventilation according to claim 6, is characterized in that described main separator (5) is fixed with mounting bracket (4).
8. the crankcase closed system of ventilation according to claim 6, is characterized in that described main separator steam outlet pipe (7) is upwards bent to form inverted U-shaped successively successively, and is obliquely installed.
9. the crankcase closed system of ventilation according to claim 2, the closing cap (60) of pressure regulation section (54) of giving vent to anger described in it is characterized in that is provided with safety cover (55), and (55) offer air passing hole with safety cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420823597.5U CN204457936U (en) | 2014-12-24 | 2014-12-24 | The crankcase closed system of ventilation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420823597.5U CN204457936U (en) | 2014-12-24 | 2014-12-24 | The crankcase closed system of ventilation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457936U true CN204457936U (en) | 2015-07-08 |
Family
ID=53664838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420823597.5U Expired - Fee Related CN204457936U (en) | 2014-12-24 | 2014-12-24 | The crankcase closed system of ventilation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678836A (en) * | 2018-05-11 | 2018-10-19 | 中国石油天然气集团有限公司 | Engine crankcase waste gas recirculating system and engine with the system |
-
2014
- 2014-12-24 CN CN201420823597.5U patent/CN204457936U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678836A (en) * | 2018-05-11 | 2018-10-19 | 中国石油天然气集团有限公司 | Engine crankcase waste gas recirculating system and engine with the system |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 |