CN208803886U - A kind of crankcase ventilation system - Google Patents
A kind of crankcase ventilation system Download PDFInfo
- Publication number
- CN208803886U CN208803886U CN201820838400.3U CN201820838400U CN208803886U CN 208803886 U CN208803886 U CN 208803886U CN 201820838400 U CN201820838400 U CN 201820838400U CN 208803886 U CN208803886 U CN 208803886U
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- CN
- China
- Prior art keywords
- crankcase
- ventilation
- ventilation duct
- ventilation system
- crankshaft
- Prior art date
- 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.)
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a kind of crankcase ventilation systems, including forced ventilation system, further include ventilation duct, and one end of ventilation duct is connected to crankcase, and the other end is communicated with the atmosphere.The purpose of this utility model is that: for the problem that existing ventilating system can make occur the case where negative pressure in crankcase, and then the operation of crankshaft can be impacted, a kind of crankcase ventilation system is provided.The ventilating system adds natural ventilation system on the basis of existing forced ventilation mode, can avoid occurring the case where positive pressure or negative pressure in crankcase simultaneously, so that crankshaft operating condition be made to keep stable and normal.
Description
Technical field
The utility model belongs to engine system field of engineering technology.In particular it relates to one of engine system song
Ventilation system for shaft box.
Background technique
Crankshaft is the main rotating mechanism of engine, it, which is responsible for, is changed into the circle of itself for pumping for piston
Zhou Yundong, and the engine speed usually described in us is exactly the revolving speed of crankshaft.Crankshaft be in engine most important component it
One, it bears the power that connecting rod transmits, and is transformed into torque and is exported by crankshaft and other attachmentes on engine is driven to work.
Crankcase is the position that cylinder block lower part is used to install crankshaft, divides upper crankcase and lower crankcase.Upper crankcase with
Cylinder block cast solid, lower crankcase is used to lubrication oil, and closes upper crankcase, therefore also known as oil sump.Upper and lower bent
Equipped with liner between axle box joint surface, oil leak is prevented.When the engine is working, the high pressure combustion mixture of combustion chamber and
Burnt gas can more or less be leak into crankcase by the gap between piston group and cylinder, cause gas blowby.The ingredient of gas blowby
For unburned fuel vapor, vapor and exhaust gas etc., this can dilute machine oil, reduce the service performance of machine oil, accelerate machine oil oxidation,
It is rotten.Condensation of moisture will form greasy filth, clogged oil line in machine oil；Sour gas in exhaust gas is mixed into lubricating system, will lead to
The corrosion and accelerated wear test of engine part；Gas blowby can also make the hypertonia of crankcase and destroy the sealing of crankcase, make machine
For oil from crankcase oil seal, crankcase liner etc. Loss by leaching, the machine oil steam of loss can be dirty to enging cabin and atmosphere
Dye.
To prevent crankcase pressure excessively high, extends machine oil service life, reduce parts depreciation and corrosion, prevent engine from leaking
Oil, it is necessary to carry out crankcase ventilation.Crankcase ventilation includes gravity-flow ventilation and forced ventilation.Natural ventilation system, i.e., in crankshaft
Ventilation duct is set on case, air filter screen is housed on pipe.When crankcase pressure increases, the gas in crankcase is leak into via logical
Air hose discharge.Gaseous mixture in crankcase is oriented to the appropriate location of air inlet pipe by forced ventilation mode by connecting tube, returns to gas
Cylinder rekindles.Since forced ventilation can not only reduce exhaust pollution, but also improve the economy of engine；Therefore, machine is sent out at present
All only with mandatory draft type.
Due to being provided with check valve in forced ventilation system, which only allows the hyperbar gas in crankcase to enter
Air inlet pipe eventually enters into cylinder and rekindles.However, operating condition is complicated in crankcase, the case where there is also negative pressure, at this time equally
The operation of crankshaft can be impacted.
Utility model content
The purpose of this utility model is that: it can make occur the case where negative pressure in crankcase for existing ventilating system, in turn
The problem of impacting to the operation of crankshaft, provide a kind of crankcase ventilation system.The ventilating system is in existing forced ventilation
On the basis of mode, natural ventilation system is added, can avoid occurring the case where positive pressure or negative pressure in crankcase simultaneously, to make
Crankshaft operating condition keeps stable and normal.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of crankcase ventilation system, including forced ventilation system further include ventilation duct, one end of ventilation duct and crankcase
Connection, the other end are communicated with the atmosphere.The problem of forced ventilation system of this programme can solve positive pressure in crankcase.For we
The natural ventilation system of case, when occurring negative pressure in crankcase, the ventilation duct being communicated with the atmosphere can suck portion of air and enter
Crankcase, pressure in balance crankshaft case.It can avoid occurring the case where positive pressure or negative pressure in crankcase simultaneously, so that crankshaft be made to transport
Row operating condition keeps stable and normal.
Preferably, by being connected in valve mechanism cover, realization is connected to crankcase for one end of ventilation duct.It can mention
Height assembly flexibility.
Preferably, by being connected on vehicle escape pipe, realization is communicated with the atmosphere the other end of ventilation duct.Ventilation
Pipe is also sucked into the gas in a part of vehicle escape pipe, and crankcase is entered together with portion of air.When occurring just in crankcase
When pressure, cylinder is entered by forced ventilation system together, is rekindled.
Preferably, ventilation duct and valve mechanism cover or ventilation duct are connected with each other with vehicle escape pipe using clip.Folder
Hoop is fixed with better stability and detachability.
Preferably, protective case is coated in pipe outer wall of divulging information.The heat insulating ability and wearability of ventilation duct are improved, is reduced
A possibility that freezed in winter.
Preferably, ventilation duct is hose.Hose keeps ventilation duct easy to operate during the installation process, and avoid and its
He interferes component.
In conclusion by adopting the above-described technical solution, compared with the prior art, the beneficial effects of the utility model
It is: the problem of forced ventilation system of the utility model can solve positive pressure in crankcase.For natural ventilation system, work as crankshaft
When occurring negative pressure in case, the ventilation duct being communicated with the atmosphere can suck portion of air and enter crankcase, pressure in balance crankshaft case.
It can avoid occurring the case where positive pressure or negative pressure in crankcase simultaneously, so that crankshaft operating condition be made to keep stable and normal.This
Outside, the utility model is full-featured, and structure is simple, is easy to development and production.
Detailed description of the invention
Fig. 1 is the structure of the main view of embodiment.
Fig. 2 is the structure right side view of embodiment.
Fig. 3 is the structure schematic top plan view of embodiment.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Present embodiment discloses a kind of crankcase ventilation systems, as shown in Figure 1-3, including forced ventilation system, further include
One end 2 of ventilation duct 1, ventilation duct 1 is connected to crankcase, and the other end 3 is communicated with the atmosphere.One end 2 of ventilation duct 1 is connected to crankshaft
Position on case more than lubricating oil liquid level, for being connected to the anti-oil leak scheme at position, the present embodiment uses the prior art,
Therefore it does not repeat.
Specifically, as shown in Figure 1-3, one end 2 of ventilation duct 1 is realized and connected with crankcase by being connected in valve mechanism cover
It is logical.By being connected on vehicle escape pipe, realization is communicated with the atmosphere the other end 3 of ventilation duct 1.
In addition, as shown in Figure 1-3, ventilation duct 1 and valve mechanism cover or ventilation duct 1 and vehicle escape pipe are mutual using clip
Connection, clip use Q673C23 steel band type elastic hose clamp, have better stability and detachability.1 outer wall of ventilation duct
On be coated with 5mm foaming protective case 4, guarantee its good heat insulating ability and wearability.Ventilation duct 1 is hose.
Forced ventilation system can solve the problem of positive pressure in crankcase.For natural ventilation system, when going out in crankcase
When existing negative pressure, the ventilation duct 1 being communicated with the atmosphere can suck portion of air and enter crankcase, pressure in balance crankshaft case.In addition,
The gas being also sucked into a part of vehicle escape pipe, enters crankcase together with portion of air.When occurring positive pressure in crankcase
When, cylinder is entered by forced ventilation system together, is rekindled.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
1. a kind of crankcase ventilation system, including forced ventilation system, it is characterised in that: further include ventilation duct (1), ventilation duct
(1) one end (2) is connected to crankcase, and the other end (3) is communicated with the atmosphere；The other end (3) of ventilation duct (1) is whole by being connected to
On vehicle escape pipe, realization is communicated with the atmosphere.
2. crankcase ventilation system according to claim 1, it is characterised in that: one end (2) of ventilation duct (1) passes through connection
In valve mechanism cover, realization is connected to crankcase.
3. crankcase ventilation system according to claim 1 or 2, it is characterised in that: ventilation duct (1) and valve mechanism cover, or
Ventilation duct (1) is connected with each other with vehicle escape pipe using clip.
4. crankcase ventilation system according to claim 1, it is characterised in that: be coated with protection on ventilation duct (1) outer wall
It covers (4).
5. crankcase ventilation system according to claim 1, it is characterised in that: ventilation duct (1) is hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820838400.3U CN208803886U (en) | 2018-05-31 | 2018-05-31 | A kind of crankcase ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820838400.3U CN208803886U (en) | 2018-05-31 | 2018-05-31 | A kind of crankcase ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208803886U true CN208803886U (en) | 2019-04-30 |
Family
ID=66224831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820838400.3U Active CN208803886U (en) | 2018-05-31 | 2018-05-31 | A kind of crankcase ventilation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208803886U (en) |
-
2018
- 2018-05-31 CN CN201820838400.3U patent/CN208803886U/en active Active
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