CN214247456U - Forced ventilation device for crankcase and engine thereof - Google Patents
Forced ventilation device for crankcase and engine thereof Download PDFInfo
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- CN214247456U CN214247456U CN202023287246.1U CN202023287246U CN214247456U CN 214247456 U CN214247456 U CN 214247456U CN 202023287246 U CN202023287246 U CN 202023287246U CN 214247456 U CN214247456 U CN 214247456U
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- control valve
- crankcase
- head cover
- ventilation device
- gas separation
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Abstract
The utility model provides a crankcase forced draft device, the inside of cylinder head cover shell only is equipped with an integrated form oil-gas separation chamber, just can realize the blowby gas oil-gas separation of crankcase under low, medium, high three load condition, has reduced the connecting line of engine cylinder head cover shell and crankcase to engine cylinder head cover shell simple structure practices thrift manufacturing cost and time.
Description
Technical Field
The application relates to the field of engines, in particular to a crankcase forced ventilation device and an engine thereof.
Background
During the working process of the engine, high-pressure unburned gas in the cylinder can permeate into the crankcase through the piston group and the cylinder hole matching auxiliary clearance, the gas is called blow-by gas, the blow-by gas can enter the atmosphere from the crankcase to cause pollution, the mixed gas of the blow-by gas is not discharged, and the engine oil in the crankcase can be diluted to cause the engine to be damaged.
The cylinder head of the gasoline engine in the related technology comprises a cylinder head cover shell, an oil filler cover, a low-load oil-gas separation cavity, a PCV (Positive Crankcase Ventilation) valve, a medium-high load oil-gas separation cavity and a Crankcase vent, wherein the cylinder head cover shell is a base body for bearing all components, the oil filler cover is positioned at the front end of an air inlet side of the engine, the low-load oil-gas separation cavity is positioned at the rear half part of the air inlet side of the engine, the PCV valve is connected with the low-load oil-gas separation cavity and positioned at the rear end of the air inlet side of the engine, the medium-high load oil-gas separation cavity is positioned at an exhaust side of the engine, and the Crankcase vent is connected with the medium-high load oil-gas separation cavity and positioned at the front end of the exhaust side of the engine. The low-load oil-gas separation cavity is used for separating engine oil in gas sucked into the intake manifold due to the negative pressure of the intake manifold; the medium and high load oil-gas separation cavity is used for separating engine oil in blow-by gas sucked into the rear end of the air filter space due to the pressure difference between the crankcase and the rear end of the air filter.
The technical structure is more complex, and more structures are arranged in the shell of the cylinder head cover; in addition, when gas passes through the low-load oil-gas separation chamber, fresh air from the rear end of the air filter can directly enter the cylinder head cover shell from the middle-high load gasoline separation chamber, so that supplemented fresh air cannot enter a crankcase, part of blow-by gas from the crankcase cannot be completely discharged, and the problem of deterioration and emulsification of engine oil in the crankcase can be caused after a long time.
Disclosure of Invention
The object of the present application is to solve at least to some extent one of the above mentioned technical problems.
To this end, a first objective of the present application is to provide a crankcase forced ventilation device, which includes a cylinder head cover housing, and an integrated oil-gas separation chamber disposed in the cylinder head cover housing, the integrated oil-gas separation chamber being connected to a crankcase, wherein the integrated oil-gas separation chamber is configured to perform oil-gas separation when an engine is under low load, medium load, and high load.
A second object of the present application is to propose an engine.
In order to achieve the above object, in the positive crankcase ventilation device provided in the embodiment of the first aspect of the present application, only one integrated oil-gas separation chamber is arranged inside the cylinder head cover housing, so that blow-by oil-gas separation of the crankcase in low, medium, and high load states can be achieved, a connecting pipeline between the engine cylinder head cover housing and the crankcase is reduced, and the engine cylinder head cover housing has a simple structure, and saves manufacturing cost and time.
According to the positive crankcase ventilation device provided by the embodiment of the application, the cylinder head cover shell is provided with a ventilation opening connected with the crankcase, and the integrated oil-gas separation cavity is connected with the crankcase through the ventilation opening.
According to this application embodiment's positive crankcase ventilation device, including first control valve, integrated form oil-gas separation chamber is connected to the one end of first control valve, intake manifold is connected to the other end of first control valve.
According to the positive crankcase ventilation device provided by the embodiment of the application, the first control valve is arranged in the cylinder head cover shell or arranged outside the cylinder head cover shell and is connected with the cylinder head cover shell through a pipeline.
According to this application embodiment's positive crankcase ventilation device, including the second control valve, integrated form oil-gas separation chamber is connected to the one end of second control valve, the pipeline of empty filter rear end is connected to the other end of second control valve.
According to the positive crankcase ventilation device provided by the embodiment of the application, the second control valve is arranged in the cylinder head cover shell or arranged outside the cylinder head cover shell and is connected with the cylinder head cover shell through a pipeline.
According to the positive crankcase ventilation device provided by the embodiment of the application, when an engine is in a low-load state, the first control valve is opened, the second control valve is closed, and blow-by gas in the crankcase enters the integrated oil-gas separation chamber and then enters the intake manifold through the first control valve.
According to the positive crankcase ventilation device provided by the embodiment of the application, when an engine is in a medium-high load state, the first control valve is closed, the second control valve is opened, and blow-by gas in the crankcase enters the integrated oil-gas separation chamber and then enters the rear end of the air filter through the second control valve.
According to this application embodiment's crankcase forced draft device, including bypass line, the crankcase is connected to bypass line one end connection air cleaner rear end, the other end, be equipped with the third control valve on the bypass line.
The engine provided by the embodiment of the second aspect of the application comprises the positive crankcase ventilation device.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a positive crankcase ventilation device according to an embodiment of the application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes a positive crankcase ventilation device and an engine according to an embodiment of the present application with reference to the drawings.
In the crankcase forced ventilation device in the prior art, a low-load oil-gas separation cavity and a medium-high load gasoline separation cavity are arranged, and work is carried out under different loads of an engine, but the structure is more complex, and more structures are arranged in a shell of a cylinder head cover; in addition, when gas passes through the low-load oil-gas separation chamber, fresh air from the rear end of the air filter can directly enter the cylinder head cover shell from the middle-high load gasoline separation chamber, so that supplemented fresh air cannot enter a crankcase, part of blow-by gas from the crankcase cannot be completely discharged, and the problem of deterioration and emulsification of engine oil in the crankcase can be caused after a long time.
In order to solve one of the above technical problems, the present application provides a crankcase ventilation device, as shown in fig. 1, the crankcase ventilation device includes a cylinder head cover housing 10, an integrated oil-gas separation chamber 20 disposed in the cylinder head cover housing 10, the integrated oil-gas separation chamber 20 being connected to a crankcase 30, wherein the integrated oil-gas separation chamber 20 is configured to perform oil-gas separation when an engine is under low load, medium load and high load.
The cylinder head cover shell 10 is internally provided with only one integrated oil-gas separation cavity 20, so that blow-by oil-gas separation of the crankcase 30 under low, medium and high load states can be realized, connecting pipelines of the engine cylinder head cover shell 10 and the crankcase 30 are reduced, the engine cylinder head cover shell 10 is simple in structure, and the manufacturing cost and time are saved.
In order to exhaust blow-by gas generated in the crankcase 30 during operation of the engine, the cylinder head cover housing 10 is provided with a ventilation opening connected with the crankcase 30, the integrated oil-gas separation chamber 20 is connected with the crankcase 30 through the ventilation opening, and the blow-by gas in the crankcase 30 enters the integrated oil-gas separation chamber 20 for oil-gas separation.
In the embodiment of the present application, the positive crankcase ventilation device includes a first control valve 40, one end of the first control valve 40 is connected to the integrated oil-gas separation chamber 20, and the other end of the first control valve 40 is connected to the intake manifold 60. When the engine is in a low-load state, the first control valve 40 is opened, the second control valve 50 is closed, the blow-by gas in the crankcase 30 enters the integrated oil-gas separation chamber 20 and then enters the intake manifold 60 through the first control valve 40, wherein the first control valve 40 and the second control valve 50 are electromagnetic valves and are controlled by the engine control unit.
In the embodiment of the present application, the positive crankcase ventilation device includes a second control valve 50, one end of the second control valve 50 is connected to the integrated oil-gas separation chamber 20, and the other end of the second control valve 50 is connected to a pipeline at the rear end of the air filter 70. When the engine is in a medium and high load state, the first control valve 40 is closed, the second control valve 50 is opened, and the blow-by gas in the crankcase 30 enters the integrated oil-gas separation chamber 20 and then enters the rear end of the air filter 70 through the second control valve 50. The front end of the air filter is connected to the atmosphere, and the rear end of the air filter is connected to the intake manifold 60.
In the embodiment of the present application, the first control valve 40 is provided inside the head cover housing 10, or outside the head cover housing 10, and if provided outside the head cover housing 10, is connected to the head cover housing 10 through a pipe; the second control valve 50 is provided in the head cover housing 10, or outside the head cover housing 10, and if provided outside the head cover housing 10, is connected to the head cover housing 10 through a pipe.
In the embodiment of the present application, the positive crankcase ventilation device further includes a bypass line 90, one end of the bypass line 90 is connected to the rear end of the air filter 70, and the other end is connected to the crankcase 30, and the bypass line is provided with a third control valve 80 between the crankcase 30 and the air filter 70. When the third control valve 80 is opened, outside air passes through the air filter 70 and then enters the crankcase 30 through the bypass line 90, and residual blow-by gas in the crankcase 30 enters the integrated oil-gas separation chamber 20 in the cylinder head cover shell 10 under the pressure of the air to perform oil-gas separation, so that the phenomenon of engine oil deterioration or emulsification caused by the residual blow-by gas is solved.
The application also provides an engine comprising the positive crankcase ventilation device disclosed by the embodiment of the application.
In the description of the present application, it is to be understood that the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", "tenth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first," second, "" third, "" fourth, "" fifth, "" sixth, "" seventh, "" eighth, "" ninth, "and tenth" may explicitly or implicitly include at least one such feature.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "communicating," "secured," and the like are to be construed broadly, e.g., as meaning either fixedly communicating, removably communicating, or integrally formed; either mechanically or electrically; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The forced ventilation device of the crankcase comprises a cylinder head cover shell and is characterized in that an integrated oil-gas separation cavity is arranged in the cylinder head cover shell and is connected with the crankcase, wherein the integrated oil-gas separation cavity is configured to perform oil-gas separation when an engine is in a low-load state, a medium-load state and a high-load state.
2. The positive crankcase ventilation device of claim 1, wherein the cylinder head cover housing is provided with a vent connected to the crankcase, and the integrated oil-gas separation chamber is connected to the crankcase through the vent.
3. The positive crankcase ventilation device according to claim 2, further comprising a first control valve, wherein one end of the first control valve is connected to the integrated oil-gas separation chamber, and the other end of the first control valve is connected to the intake manifold.
4. The positive crankcase ventilation device of claim 3, wherein the first control valve is disposed in the head cover housing or is disposed outside the head cover housing and is connected to the head cover housing by a conduit.
5. The positive crankcase ventilation device according to claim 4, further comprising a second control valve, wherein one end of the second control valve is connected with the integrated oil-gas separation chamber, and the other end of the second control valve is connected with a pipeline at the rear end of the air filter.
6. The positive crankcase ventilation device of claim 5, wherein the second control valve is disposed within the head cover housing or is disposed outside the head cover housing and is connected to the head cover housing by a conduit.
7. The positive crankcase ventilation device according to claim 6, wherein under low load conditions of the engine, the first control valve is opened, the second control valve is closed, and blow-by gas in the crankcase enters the integrated gas-oil separation chamber and then enters the intake manifold through the first control valve.
8. The positive crankcase ventilation device according to claim 7, wherein the first control valve is closed and the second control valve is opened when the engine is in a medium or high load state, and the blow-by gas in the crankcase enters the integrated oil-gas separation chamber and then enters the rear end of the air filter through the second control valve.
9. The positive crankcase ventilation device according to claim 7, further comprising a bypass line, wherein one end of the bypass line is connected to the rear end of the air filter, the other end of the bypass line is connected to the crankcase, and the bypass line is provided with a third control valve.
10. An engine comprising a positive crankcase ventilation device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023287246.1U CN214247456U (en) | 2020-12-30 | 2020-12-30 | Forced ventilation device for crankcase and engine thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023287246.1U CN214247456U (en) | 2020-12-30 | 2020-12-30 | Forced ventilation device for crankcase and engine thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214247456U true CN214247456U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023287246.1U Active CN214247456U (en) | 2020-12-30 | 2020-12-30 | Forced ventilation device for crankcase and engine thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214247456U (en) |
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2020
- 2020-12-30 CN CN202023287246.1U patent/CN214247456U/en active Active
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