CN219431915U - Two-stage detachable engine crankcase ventilation system - Google Patents
Two-stage detachable engine crankcase ventilation system Download PDFInfo
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- CN219431915U CN219431915U CN202223509170.1U CN202223509170U CN219431915U CN 219431915 U CN219431915 U CN 219431915U CN 202223509170 U CN202223509170 U CN 202223509170U CN 219431915 U CN219431915 U CN 219431915U
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- filter element
- labyrinth structure
- mounting seat
- oil
- labyrinth
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a two-stage detachable engine crankcase ventilation system, which comprises a cylinder cover main shell, a filter element assembly, a first filter element mounting seat and a second filter element mounting seat, wherein the cylinder cover main shell is detachably arranged on the top surface of a cylinder cover; the upside of cylinder head cover main casing is provided with first labyrinth structure and second labyrinth structure, first filter core mount pad sets up on first labyrinth structure and forms first ventilation zone between the two, the second filter core mount pad sets up on the second labyrinth structure and forms the second ventilation zone between the two, during the ventilation, mixed oil gas gets into first ventilation zone or second ventilation zone from the air inlet, after filter core subassembly, the separation, fluid flows back into cylinder head headspace and finally get back to the crankcase through the oil gallery, clean gas goes to the cylinder through the gas outlet and burns, compare with the design that does not have the filter core in the prior art, it is cleaner to admit air, thereby help realizing better engine combustion performance reduces oil consumption and exhaust gas pollutant emission.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to a two-stage detachable engine crankcase ventilation system.
Background
An economically efficient crankcase gas filtration solution is a key goal of modern engine design.
In the prior art, CCV (crankcase ventilation system) air inlets integrated in a plastic cylinder head cover direct crankcase gas to the CCV device area. Crankcase gas is drawn through the CCV region by a lower pressure downstream and then drawn into the engine cylinders to participate in combustion. The filtration efficiency (i.e. the rate at which oil mist is separated from crankcase gas) is determined by the quality of the CCV device design. There are other plastic panels integrated into the head cover to act as deflectors and baffles to form a complete CCV apparatus. However, due to the permanent attachment to the head cover, current CCV systems (i.e., plastic panel sets) are not replaceable unless the entire head cover is replaced. Further, if the head cover is not detached from the engine, the area cannot be cleaned.
The existing designs include (a) a head cover main housing integrating a CCV labyrinth structure; (b) CCV gas impactor plates. The latter is permanently assembled to (a) by riveting. The design is free of filter elements and the separation of oil mist from crankcase gas can only be achieved by means of a labyrinth structure feature. However, this method does not guarantee that the oil-gas separation effect is optimal. The gas flowing downstream through the CCV system into the cylinder will still have a considerable amount of oil mist and thus affect engine performance and emissions in the long run.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present utility model to provide a two-stage removable engine crankcase ventilation system.
The utility model provides a two-stage detachable engine crankcase ventilation system, which comprises a cylinder cover main shell, a filter element assembly, a first filter element mounting seat and a second filter element mounting seat, wherein the cylinder cover main shell is detachably arranged on the top surface of a cylinder cover;
the upper side of the main shell of the cylinder head cover is provided with a first labyrinth structure and a second labyrinth structure, the first filter element mounting seat is arranged on the first labyrinth structure and forms a first ventilation area between the first labyrinth structure and the second labyrinth structure, and the second filter element mounting seat is arranged on the second labyrinth structure and forms a second ventilation area between the second labyrinth structure and the second labyrinth structure;
oil return holes are formed in one ends of the first labyrinth structure and the second labyrinth structure, air inlets are formed in the other ends of the first labyrinth structure and the second labyrinth structure, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the air inlets, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the oil return holes in one-way mode, and air outlets are formed in the first filter element mounting seat and the second filter element mounting seat;
the first filter element installation seat and the second filter element installation seat are detachably provided with filter element components, and the filter element components are positioned in a first ventilation area or a second ventilation area;
when ventilation is carried out, mixed oil gas in the crankcase enters a first ventilation area or a second ventilation area from an air inlet, oil liquid and clean gas are separated after oil gas separation of the filter element assembly, the oil liquid flows back into a cylinder cover top space through an oil return hole and finally returns to the crankcase, and the clean gas is sent to a cylinder through an air outlet for combustion.
Preferably, the first labyrinth structure and the second labyrinth structure comprise a labyrinth structure plate and a plurality of labyrinth structure ribs vertically arranged on the labyrinth structure plate, and the tops of the labyrinth structure ribs are attached to the filter element assembly.
Preferably, blocking ribs opposite to the labyrinth structure ribs are arranged in the first filter element mounting seat and the second filter element mounting seat, and the bottoms of the blocking ribs are attached to the filter element assembly;
and filter element installation positions are formed between the labyrinth structure ribs and the barrier ribs, and the filter element components sequentially penetrate through the filter element installation positions.
Preferably, the filter element assembly, the labyrinth structure plate, the plurality of groups of labyrinth structure ribs and the blocking ribs divide the first ventilation area or the second ventilation area into a plurality of air chambers in sequence;
the mixed oil gas sequentially enters a downstream air chamber after being subjected to oil-gas separation through the filter element assembly.
Preferably, among the plurality of air chambers, two air chambers at two ends are a first air chamber and a second air chamber respectively, the first air chamber is communicated with the interior of the crankcase through an air inlet, and the second air chamber is communicated with an air outlet.
Preferably, the plurality of air chambers are of non-airtight structures, adjacent air chambers are communicated through openings arranged on the labyrinth structure ribs and form oil flow channels, and one end of the labyrinth structure plate provided with an oil return hole is obliquely arranged downwards;
the oil flows through the oil flow passage and flows back into the crankcase through the oil return hole.
Preferably, the first filter element mounting seat and the second filter element mounting seat are connected with the main shell of the cylinder cover through a vibration welding process;
the first labyrinth structure and the second labyrinth structure are integrally formed and arranged on the main shell of the cylinder head cover.
Preferably, the filter element assembly comprises a filter element and a filter element shell sleeved outside the filter element.
Preferably, the filter element is cylindrical, the filter element shell is a plastic piece, a plurality of small holes are formed in the wall of the filter element shell, and the filter element shell is installed on the filter element installation seat through threaded connection.
Preferably, a filter element insertion hole is formed in each of opposite ends of the first filter element mounting seat and the second filter element mounting seat, and the filter element assembly is inserted into the first ventilation area or the second ventilation area through the filter element insertion hole.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model has simple structure and convenient operation, and by adopting the technical means that the main cylinder cover shell is detachably arranged on the crankcase, and the filter element components are detachably arranged on the first filter element mounting seat and the second filter element mounting seat, the main cylinder cover shell can be cleaned only by replacing the filter element components without detaching the main cylinder cover shell from the engine, thereby ensuring the cleaning of a ventilation area, being easy to complete and saving time, reducing the labor cost, and simultaneously, compared with the design without the filter element in the prior art, the air inlet is cleaner, thereby being beneficial to realizing better engine combustion performance and further reducing the oil consumption and the exhaust pollutant emission.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is an exploded view of the present utility model;
FIG. 2 is a schematic top view of a main housing of a cylinder head cover according to the present utility model;
FIG. 3 is a schematic view in semi-section from the perspective A-A in FIG. 2;
FIG. 4 is a schematic perspective view of a main casing of a cylinder head cover according to the present utility model;
fig. 5 is a schematic diagram of the flow principle of the mixed oil and gas in the first ventilation area or the second ventilation area.
The figure shows:
fourth labyrinth rib 9 of main casing 1 of cylinder head cover
Fifth labyrinth structure rib 10 of filter element shell 2
Sixth labyrinth structure rib 11 of filter element 3
Seventh labyrinth structure rib 12 of first filter element mounting seat 4
Second filter element mounting seat 5 first air chamber 13
First labyrinth rib 6 second air chamber 14
Third air chamber 15 of second labyrinth structure rib 7
Third labyrinth rib 8 fourth air chamber 16
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
The utility model discloses a two-stage detachable engine crankcase ventilation system, which can be maintained only by detaching a main cylinder cover shell during vehicle maintenance, and can ensure the cleaning of a ventilation area by replacing a filter element assembly without detaching the main cylinder cover shell from an engine when the main cylinder cover shell is cleaned, and is easy to complete and saves time, so that the labor cost is reduced.
According to the two-stage detachable engine crankcase ventilation system provided by the utility model, as shown in fig. 1-5, the two-stage detachable engine crankcase ventilation system comprises a cylinder head cover main shell 1, a filter element assembly, a first filter element mounting seat 4 and a second filter element mounting seat 5, wherein the cylinder head cover main shell 1 is detachably arranged on the top surface of a cylinder head; the middle part of the upper side of the main shell 1 of the cylinder cover is provided with an oil filler, and the oil filler is connected with an oil filler cap through threads.
The upper side of the cylinder head cover main shell 1 is provided with a first labyrinth structure and a second labyrinth structure, the first filter element mounting seat 4 is arranged on the first labyrinth structure and forms a first ventilation area between the first labyrinth structure and the second labyrinth structure, and the second filter element mounting seat 5 is arranged on the second labyrinth structure and forms a second ventilation area between the second labyrinth structure and the second labyrinth structure; oil return holes are formed in one ends of the first labyrinth structure and the second labyrinth structure, air inlets are formed in the other ends of the first labyrinth structure and the second labyrinth structure, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the air inlets, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the oil return holes in one way, and air outlets are formed in the first filter element mounting seat 4 and the second filter element mounting seat 5; preferably, the first labyrinth structure and the second labyrinth structure are symmetrically arranged.
The first filter element mounting seat 4 and the second filter element mounting seat 5 are detachably provided with filter element components along the length direction, and the filter element components are positioned in a first ventilation area or a second ventilation area; the first filter element mounting seat 4 and the second filter element mounting seat 5 are connected with the cylinder cover main shell 1 through a vibration welding process; the first labyrinth structure and the second labyrinth structure are integrally formed and arranged on the cylinder head cover main shell 1. Preferably, a filter element insertion hole is formed at each end of the first filter element mounting seat 4 and the second filter element mounting seat 5 opposite to each other, and the filter element assembly is inserted into the first ventilation area or the second ventilation area through the filter element insertion hole. The filter element assembly comprises a filter element 3 and a filter element shell 2 sleeved outside the filter element 3. The filter element 3 is cylindrical, the filter element shell 2 is a plastic piece, a plurality of small holes are formed in the wall of the filter element shell, and the filter element shell 2 is installed on the filter element installation seat through threaded connection.
When ventilation is carried out, as shown in fig. 3 and 5, mixed oil gas in the crankcase enters a first ventilation area or a second ventilation area from an air inlet, oil and gas are separated into oil liquid and clean gas after being separated by oil and gas of a filter element assembly, the oil liquid flows back into a cylinder cover top space through an oil return hole and finally returns to the crankcase, and the clean gas is sent to a cylinder through an air outlet for combustion.
As shown in fig. 4 and 5, the first labyrinth structure and the second labyrinth structure each comprise a labyrinth structure plate and a plurality of labyrinth structure ribs vertically arranged on the labyrinth structure plate, and the tops of the labyrinth structure ribs are attached to the filter element assembly. The inside of the first filter element installation seat 4 and the inside of the second filter element installation seat 5 are respectively provided with a blocking rib opposite to the labyrinth structure ribs, and the bottoms of the blocking ribs are attached to the filter element assembly; and filter element installation positions are formed between the labyrinth structure ribs and the barrier ribs, and the filter element components sequentially penetrate through the filter element installation positions.
The filter element assembly, the labyrinth structure plate, the plurality of groups of labyrinth structure ribs and the blocking ribs divide the first ventilation area or the second ventilation area into a plurality of air chambers in sequence; the mixed oil gas sequentially enters a downstream air chamber after being subjected to oil-gas separation through the filter element assembly. And two air chambers at two ends of the plurality of air chambers are respectively a first air chamber and a second air chamber, the first air chamber is communicated with the interior of the crankcase through an air inlet, and the second air chamber is communicated with an air outlet. The plurality of air chambers are of non-airtight structures, adjacent air chambers are communicated through openings arranged on the labyrinth structure ribs and form oil flow channels, and one end of the labyrinth structure plate provided with an oil return hole is arranged in a downward inclined mode; the oil flows through the oil flow passage and flows back into the crankcase through the oil return hole.
Example 1
As shown in fig. 2, the labyrinth structure ribs in the present embodiment are seven and serve as gas impact walls, namely, the first labyrinth structure rib 6, the second labyrinth structure rib 7, the third labyrinth structure rib 8, the fourth labyrinth structure rib 9, the fifth labyrinth structure rib 10, the sixth labyrinth structure rib 11 and the seventh labyrinth structure rib 12, and the seven labyrinth structure ribs and the barrier ribs serve as primary oil gas filtering characteristics so as to remove large oil drops in the mixed oil gas.
As shown in fig. 3-4, the seven labyrinth ribs and the three blocking ribs divide the first ventilation area or the second ventilation area into four chambers in sequence, namely, a first chamber 13, a second chamber 14, a third chamber 15 and a fourth chamber 16 in sequence, and an oil flow channel is formed between the seven labyrinth ribs, the first chamber 13 is used for guiding mixed oil gas from a crankcase, the air pressure of the second chamber 14, the third chamber 15 and the fourth chamber 16 at the downstream is smaller than that of the first chamber 13, the low pressure is favorable for sucking the mixed oil gas into the center of the filter element 3, and then, when the mixed oil gas flows through the remaining second chamber 14, the third chamber 15 and the fourth chamber 16 respectively, oil-gas separation occurs, most of oil mist is captured by the filter element 3 and finally slides through perforations on the filter element 3, flows to oil return holes along the inclined structure of the labyrinth structure plate, and then returns to the crankcase area.
Since the oil mist has been separated from the mixed oil and gas, clean gas will escape through the cylindrical outlet and flow downstream and through the CCV outlet to the cylinder for combustion, while the second 14, third 15 and fourth 16 air chambers communicate with each other through the openings of the barrier ribs or the labyrinth ribs therebetween, these opening dimensions are calibrated during the part development stage to ensure optimal filtering performance and not jeopardize the engine crankcase ventilation operation, the same procedure is also applicable to determining the number and size of small holes in the cartridge housing 2, i.e. the small Kong Shuxing (i.e. hole size and number and direction) of the cartridge housing 2 can be further optimized by computational fluid dynamics analysis to evaluate the flow behaviour in the first/second ventilation zone to ensure optimal crankcase system ventilation function of the engine.
The filter element 3 material itself is also suitably developed and designed to ensure a balance between optimum oil and gas filtration, oil absorption (i.e., to "release" the oil back into the sump after the trapping process), and to maintain good engine crankcase ventilation. The filter element 3 material may be modified according to the engineering requirements of the application, and this material may be further studied and developed in the laboratory to improve its oil-gas separation performance and reduce costs, while in example 1 the filter element 3 uses typical filter papers used in the intake filter, a lower cost solution may be proposed, and in another example the filter element 3 uses wire mesh type material would be a reasonable approach to a longer durability solution (i.e. less prone to collapse, better oil mist retention and cleanability), but this is a more costly solution.
In addition, the dimensions of the first/second ventilation zone and its associated components (i.e. cartridge 3 and cartridge housing 2) are also affected by other critical factors, namely engine layout, overall size limitations and maintenance considerations, all of which must be well addressed during the design phase to meet the associated engineering requirements.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. The two-stage detachable engine crankcase ventilation system is characterized by comprising a cylinder cover main shell (1), a filter element assembly, a first filter element mounting seat (4) and a second filter element mounting seat (5), wherein the cylinder cover main shell (1) is detachably arranged on the top surface of a cylinder cover;
the upper side of the main cylinder cover shell (1) is provided with a first labyrinth structure and a second labyrinth structure, the first filter element mounting seat (4) is arranged on the first labyrinth structure and forms a first ventilation area between the first labyrinth structure and the second labyrinth structure, and the second filter element mounting seat (5) is arranged on the second labyrinth structure and forms a second ventilation area between the second labyrinth structure and the second labyrinth structure;
oil return holes are formed in one ends of the first labyrinth structure and the second labyrinth structure, air inlets are formed in the other ends of the first labyrinth structure and the second labyrinth structure, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the air inlets, the first ventilation area and the second ventilation area are communicated with the interior of the crankcase through the oil return holes in one-way mode, and air outlets are formed in the first filter element mounting seat (4) and the second filter element mounting seat (5);
the first filter element mounting seat (4) and the second filter element mounting seat (5) are detachably provided with filter element components, and the filter element components are positioned in a first ventilation area or a second ventilation area;
when ventilation is carried out, mixed oil gas in the crankcase enters a first ventilation area or a second ventilation area from an air inlet, oil liquid and clean gas are separated after oil gas separation of the filter element assembly, the oil liquid flows back into a cylinder cover top space through an oil return hole and finally returns to the crankcase, and the clean gas is sent to a cylinder through an air outlet for combustion.
2. The two-stage removable engine crankcase ventilation system of claim 1, wherein the first and second labyrinth structures each comprise a labyrinth structure plate and a plurality of labyrinth structure ribs vertically disposed on the labyrinth structure plate, and wherein tops of the plurality of labyrinth structure ribs each are bonded to the filter element assembly.
3. The two-stage detachable engine crankcase ventilation system according to claim 2, wherein the first filter element mounting seat (4) and the second filter element mounting seat (5) are both internally provided with a blocking rib opposite to the labyrinth rib, and the bottom of the blocking rib is attached to the filter element assembly;
and filter element installation positions are formed between the labyrinth structure ribs and the barrier ribs, and the filter element components sequentially penetrate through the filter element installation positions.
4. The two-stage removable engine crankcase ventilation system of claim 3, wherein the filter element assembly, labyrinth plate, plurality of sets of labyrinth ribs and barrier ribs divide the first ventilation area or the second ventilation area into a plurality of air chambers in sequence;
the mixed oil gas sequentially enters a downstream air chamber after being subjected to oil-gas separation through the filter element assembly.
5. The two-stage removable engine crankcase ventilation system of claim 4, wherein two of the plurality of air chambers are a first air chamber and a second air chamber, respectively, the first air chamber being in communication with the interior of the crankcase via the air inlet and the second air chamber being in communication with the air outlet.
6. The two-stage detachable engine crankcase ventilation system according to claim 4, wherein the plurality of air chambers are of non-airtight structures, adjacent air chambers are communicated through openings arranged on labyrinth ribs and form an oil flow passage, and one end of the labyrinth structure plate provided with an oil return hole is arranged in a downward inclined manner;
the oil flows through the oil flow passage and flows back into the crankcase through the oil return hole.
7. The two-stage detachable engine crankcase ventilation system according to claim 1, wherein the first filter element mount (4) and the second filter element mount (5) are both connected to the head cover main housing (1) by a vibration welding process;
the first labyrinth structure and the second labyrinth structure are integrally formed and arranged on the main shell (1) of the cylinder head cover.
8. The two-stage removable engine crankcase ventilation system of claim 1, wherein the filter element assembly comprises a filter element (3) and a filter element housing (2) that is sleeved outside the filter element (3).
9. The two-stage removable engine crankcase ventilation system of claim 8, wherein the filter element (3) is cylindrical, the filter element housing (2) is a plastic piece and has a plurality of small holes formed in a wall thereof, and the filter element housing (2) is mounted on the filter element mounting seat by threaded connection.
10. The two-stage removable engine crankcase ventilation system according to claim 1, wherein the first and second cartridge mounts (4, 5) are each provided with a cartridge insertion hole at one end thereof opposite to each other, through which the cartridge assembly is inserted into the inside of the first or second ventilation area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223509170.1U CN219431915U (en) | 2022-12-27 | 2022-12-27 | Two-stage detachable engine crankcase ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223509170.1U CN219431915U (en) | 2022-12-27 | 2022-12-27 | Two-stage detachable engine crankcase ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219431915U true CN219431915U (en) | 2023-07-28 |
Family
ID=87338912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223509170.1U Active CN219431915U (en) | 2022-12-27 | 2022-12-27 | Two-stage detachable engine crankcase ventilation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219431915U (en) |
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2022
- 2022-12-27 CN CN202223509170.1U patent/CN219431915U/en active Active
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