CN107227989B - Pcv valve - Google Patents
Pcv valve Download PDFInfo
- Publication number
- CN107227989B CN107227989B CN201710464485.3A CN201710464485A CN107227989B CN 107227989 B CN107227989 B CN 107227989B CN 201710464485 A CN201710464485 A CN 201710464485A CN 107227989 B CN107227989 B CN 107227989B
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- Prior art keywords
- valve body
- spool
- diaphragm
- pcv
- wall
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/0011—Breather valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/0011—Breather valves
- F01M2013/0016—Breather valves with a membrane
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of Pcv valve, including hollow upper valve body and lower valve body, the upper valve body is mutually fastened and connected with the lower valve body, the lower valve body is equipped with air inlet, the upper valve body is equipped with gas outlet, the Pcv valve further includes spool and lower diaphragm, the spool adjusts the gas flow between the air inlet and the gas outlet in a manner of the inner wall back and forth movement along the upper valve body, the lower diaphragm is covered on the hollow interior of the lower valve body, and when the upper valve body and the lower valve body are mutually fastened and connected, the upper valve body squeezes the lower diaphragm, so that the inner wall palette at the edge of the lower diaphragm and the lower valve body.Pcv valve in the present invention; the spool realizes the adjusting to the gas flow between the air inlet and the gas outlet by way of the inner wall back and forth movement along the upper valve body, and the lower diaphragm realizes back flow of gas protection by way of edge gluing, sealing.
Description
Technical field
The present invention relates to automotive engineering neighborhood, in particular to a kind of Pcv valve.
Background technique
In the process of running car, engine can generate gas blowby and be flowed into crankcase, originally crankcase pressure
The gas blowby of engine is discharged control system (i.e. crankcase is directly connected with atmosphere) by way of gravity-flow ventilation, to ensure song
Stable gas pressure inside axle box.It is most of at present to use Pcv valve to the pressure of crankcase as energy-saving and environment-friendly theory is constantly advocated
Power is controlled, and Pcv valve is usually connect with crankcase and inlet manifold pressure stabilizing cavity, and crankcase will be interior by the regulation of Pcv valve
Portion's gas blowby sends back in engine again.
However, common Pcv valve has plunger type and diaphragm type in the prior art, when being used in engine with supercharger and work as
When engine charge pressure stabilizing cavity pressure is higher than 200kPa, plunger type Pcv valve lacks the design of back flow of gas protection, will occur higher
Inverted draft amount (10~20l/min) be inversely flowed into crankcase, cause crankcase pressure obviously to increase, lose crankcase
Pressure adjusting function, and diaphragm type PCV valve lacks the regulation of throughput, can not adapt to engine with supercharger complex working condition and be formed non-
Linear pressure control.
Summary of the invention
Based on this, the Pcv valve with throughput regulation and back flow of gas protection that the object of the present invention is to provide a kind of.
A kind of Pcv valve, including hollow upper valve body and lower valve body, the upper valve body and the lower valve body mutually company of fastening
It connecing, the lower valve body is equipped with air inlet, and the upper valve body is equipped with gas outlet, and the Pcv valve further includes spool and lower diaphragm,
The spool adjusts the gas between the air inlet and the gas outlet in a manner of the inner wall back and forth movement along the upper valve body
Body flow, the lower diaphragm are covered on the hollow interior of the lower valve body, and when the upper valve body is mutually fastened with the lower valve body
When connection, the upper valve body squeezes the lower diaphragm, so that the inner wall sealing paste at the edge of the lower diaphragm and the lower valve body
It closes.
Above-mentioned Pcv valve, by the spool and the lower diaphragm of setting, when crankcase gas from the air inlet into
Fashionable, gas, which will be sent to, squeezes the lower diaphragm, and passes through the edge of the lower diaphragm caused by squeezing and the lower valve body
Gap between inner wall enters in the upper valve body, and gas will push inner wall of the spool along the upper valve body to transport at this time
It is dynamic, cause the gap between the spool and the upper valve body to send variation, thus the flow of regulating gas, when inlet manifold is steady
When the intracorporal pressure of chamber being pressed to be higher than crankcase, gas will be inversely flowed into the upper valve body from the gas outlet at this time, be passed through
Gap between the spool and the upper valve body enters in the lower valve body, and gas is by lower film described in forward extrusion at this time
Piece, the edge of the lower diaphragm by with the inner wall of the lower valve body more palette, gas will stop by the lower diaphragm, nothing
Method is entered in crankcase by the air inlet.Therefore there is the Pcv valve throughput to regulate and control and anti-gas reverse current protection
Function.
Further, the upper valve body includes the first valve body and the second valve body being mutually fastened and connected, second valve body
It is fastened and connected with the lower valve body, the gas outlet is set to the one end of first valve body far from second valve body, institute
Air inlet is stated set on the one end of the lower valve body far from second valve body.
Further, the upper valve body further includes upper diaphragm, and the upper diaphragm is set to the hollow interior of the upper valve body, and blocks
Between first valve body and second valve body, the spool is set in second valve body, and one end of the spool
It is contained in first valve body across the upper diaphragm, the spool is along the side of the inner wall back and forth movement of first valve body
Formula adjusts the gap between the upper diaphragm.
Further, the upper valve body further includes a reset spring, and the spool is set far from one end of first valve body
There is a connecting plate, the reset spring is sheathed on the spool, and is connected between the connecting plate and the upper diaphragm.
Further, the spool is tapered close to one end of first valve body, and the spool is close to described first
The end diameter of valve body one end is to being gradually increased in the middle part of the spool.
Further, second valve body opens up an accepting hole, second valve body close to one end of first valve body
A receiving hole is opened up close to one end of the lower valve body, the bottom of the receiving hole is equipped with a pillar, and the accepting hole extends to
In the pillar, the spool is set in the accepting hole.
Further, inner wall of the accepting hole close to one end of the lower valve body is tapered, and the accepting hole is close
The inner diameter of the end of described lower valve body one end is to being gradually increased in the middle part of the accepting hole.
Further, the pillar is equipped with axis through-hole, and the axis through-hole is connected to the accepting hole, the pillar
Several ventholes are offered on the side wall of one end of the receiving hole bottom, the venthole is connected to the accepting hole,
When the upper valve body and the lower valve body are mutually fastened and connected, the free terminal of the pillar squeezes the lower diaphragm.
Further, the edge of the lower diaphragm is equipped with several fixture blocks, and the inside of the lower valve body is equipped with several
Card slot, when the lower diaphragm be covered on the lower valve body it is hollow interior when, each fixture block is arranged in the card slot.
Further, the upper valve body further includes return spring, and the return spring is fixedly arranged on the interior of first valve body
On wall, and close to the spool.
Detailed description of the invention
Fig. 1 is the mounting structure schematic diagram of the Pcv valve in first embodiment of the invention.
Fig. 2 is the enlarged structure schematic diagram in Fig. 1 at I.
Fig. 3 is the stereochemical structure exploded view of the Pcv valve in first embodiment of the invention.
Fig. 4 is the enlarged structure schematic diagram in Fig. 3 at II.
Fig. 5 is the stereochemical structure exploded view of another angle of the Pcv valve in first embodiment of the invention.
Fig. 6 is the three-dimensional structure diagram of the Pcv valve in first embodiment of the invention.
Fig. 7 is the three-dimensional structure diagram of the second valve body in first embodiment of the invention.
Fig. 8 is the schematic diagram of the section structure of the Pcv valve in first embodiment of the invention.
Fig. 9 is the schematic diagram of the section structure of the Pcv valve in second embodiment of the invention.
Figure 10 is the enlarged structure schematic diagram in Fig. 9 at III.
Main element symbol description:
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give several embodiments of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 1 to Fig. 2 is please referred to, the mounting structure schematic diagram of the Pcv valve in first embodiment of the invention is shown, it is described
Pcv valve 100 is connected between crankcase 200 and inlet manifold pressure stabilizing cavity 300, and the crankcase 200 passes through the Pcv valve
The gas blowby that engine with supercharger generates is expelled back into the inlet manifold pressure stabilizing cavity 300 by 100 regulation, then the air inlet discrimination
These gas blowbies are expelled back into engine by pipe pressure stabilizing cavity 300 again again to be recycled.
Fig. 3 to Fig. 8 is please referred to, the Pcv valve 100 showing in first embodiment of the invention, including upper valve body 10, lower valve body
20, spool 30 and lower diaphragm 40, the upper valve body 10 and the lower valve body 20 are hollow structure, and are mutually fastened and connected, described
Lower valve body 20 is equipped with air inlet 1, and the lower valve body 20 is equipped with gas outlet 2, and the air inlet 1 and the gas outlet 2 pass through
Hollow interconnected in the upper valve body 10 and the lower valve body 20, the air inlet 1 passes through tracheae and the crankcase 200
Connection, the gas outlet 2 is connected to the inner wall of the inlet manifold pressure stabilizing cavity 300.
The upper valve body 10 includes the first valve body 11, the second valve body 12, upper matrix 13, reset spring 14 and return spring
15。
Wherein, first valve body 11 is mutually fastened and connected with second valve body 12, second valve body 12 with it is described
Lower valve body 20 is fastened and connected, and the gas outlet 2 is set to the one end of first valve body 11 far from second valve body 12.
Wherein, second valve body 12 opens up an accepting hole 121, second valve close to one end of first valve body 11
Body 12 opens up a receiving hole 122 close to one end of the lower valve body 20.The bottom of the receiving hole 122 is equipped with a pillar 1221,
The accepting hole 121 extends in the pillar 1221, and inner wall of the accepting hole 121 close to one end of the lower valve body 20 is in
Taper, and the accepting hole 121 close to the end of described 20 one end of lower valve body inner diameter to the middle part of the accepting hole 121
It is gradually increased.The pillar 1221 is equipped with axis through-hole 12211, and the axis through-hole 12211 connects with the accepting hole 121
Logical, the pillar 1221 offers several ventholes 12212 on the side wall of one end of 122 bottom of receiving hole, described
Venthole 12212 is connected to the accepting hole 121.
Wherein, the upper matrix 13 is set to the hollow interior of the upper valve body 10, and is arranged in first valve body 11 and institute
It states between the second valve body 12.
Wherein, the reset spring 14 is set in the accepting hole 121, and the return spring 15 is fixedly arranged on first valve
In body 11.
The lower valve body 20 is fixedly arranged in the cabinet of the crankcase 200, and the inner wall of the lower valve body 20 is equipped with several
A card slot 21, the air inlet 1 are located at the one end of the lower valve body 20 far from second valve body 12.
The spool 30 adjusted in a manner of the inner wall back and forth movement along the upper valve body 10 air inlet 1 with it is described go out
Gas flow between port 2.Specifically, the spool 30 is set in the accepting hole 121, and one end of the spool 30 passes through
The upper diaphragm 13 is contained in first valve body 11, and close to the return spring 15, and the spool 30 is far from described the
One end of one valve body 11 is equipped with a connecting plate 31, and the connecting plate 31 is stuck on the inner wall of the accepting hole 121, the reset bullet
Spring 14 is sheathed on the spool 30, and is connected between the connecting plate 31 and the upper diaphragm 13.The spool 30 is close
One end of first valve body 11 is tapered, and the spool 30 close to described first valve body, 11 one end end diameter to described
The middle part of spool 30 is gradually increased, and the spool 30 is adjusted in a manner of the inner wall back and forth movement along first valve body 11 and institute
The gap between upper diaphragm 13 is stated, and then adjusts the gas flow between the air inlet 1 and the gas outlet 2.
The edge of the lower diaphragm 40 is equipped with several fixture blocks 41, the quantity of the quantity of the fixture block 41 and the card slot 21
Corresponding, the lower diaphragm 40 is covered on the hollow interior of the lower valve body 20, and each fixture block 41 is arranged in the card
In slot 21.When the upper valve body 10 is mutually fastened and connected with the lower valve body 20, the pillar 1221 of the upper valve body 10
Free terminal squeeze the lower diaphragm 40 so that the inner wall sealing paste at the edge of the lower diaphragm 40 and the lower valve body 20
It closes.
Further, spline 12213 is additionally provided on the lateral wall of the pillar 1221, the spline 12213 is for assisting
Squeeze the lower diaphragm 40.
The Pcv valve 100 is when specifically used: described at this time when the engine with supercharger is in partial load condition
The air pressure of crankcase 200 is greater than the air pressure in the inlet manifold pressure stabilizing cavity 300, and the gas of the crankcase 200 will be from institute
The entrance of air inlet 1 is stated, lower diaphragm 40, the lower diaphragm 40 described in reverse extrusion recoverable deformation, lead to institute by gas occurs
The generation gap between the edge of lower diaphragm 40 and the inner wall of the lower valve body 20 is stated, gas enters the lower valve by gap
In the cavity that body 20 and second valve body 12 are formed, then gas passes through the venthole 12212 and the accepting hole 121 again
It enters in second valve body 12, and the spool 30 is pushed to move up along the inner wall of first valve body 11, gas will pass through
Gap between the spool 30 and the upper diaphragm 13 enters in first valve body 11, and eventually by the gas outlet
2 are flowed into the inlet manifold pressure stabilizing cavity 300, and when the spool 30 described in the gas push moves up, the spool 30 will be squeezed
The reset spring 14 and the return spring 15 (return spring 15 is just squeezed when moving up big), when air pressure reduces,
Under the action of the reset spring 14 and the return spring 15, the spool 30 will be pushed to reset；
It should be understood that due to the spool 30 close to one end of first valve body 11 diameter from end to middle part by
It is cumulative big, thus the spool 30 described in the gas push the amount of moving up it is bigger when, the gap between the upper diaphragm 13 is smaller,
Gas flow is smaller.It is described therefore when the pressure difference between the crankcase 200 and the inlet manifold pressure stabilizing cavity 300 is smaller
The amount of moving up of spool 30 is smaller, and gas flow is larger.When between the crankcase 200 and the inlet manifold pressure stabilizing cavity 300
Pressure difference it is larger when, the amount of moving up of the spool 30 is larger, and gas flow is smaller, so that it is guaranteed that the gas in the crankcase 200
Pressure tends towards stability；
When the engine with supercharger is in full load mode, the air pressure in the inlet manifold pressure stabilizing cavity 300 at this time
(being higher than 200kPa) is greater than the air pressure of the crankcase 200, and the gas of the inlet manifold pressure stabilizing cavity 300 will be from the air inlet
Mouth 1 inversely enters first valve body 11, and the gas inversely entered will reversely push the spool 30 along first valve body 11
Inner wall move down, until the connecting plate 31 is stuck on the inner wall of the accepting hole 121, at the same gas by the spool 30 with
Gap between the upper diaphragm 13 will inversely enter in the cavity between second valve body 12 and the lower valve body 20, this
When gas will lower diaphragm 40 described in forward extrusion, the edge of the lower diaphragm 40 will more be sealed with the inner wall of the lower valve body 20
Fitting, gas will be stopped by the lower diaphragm 40, and can not be entered in the crankcase 200, not influenced by the air inlet 1
Air pressure in the crankcase 200.
To sum up, the Pcv valve 100 in the above embodiment of the present invention passes through the spool 30 and the lower diaphragm of setting
40, the spool 30 realized by way of the inner wall back and forth movement along the upper valve body 10 to the air inlet 1 with it is described
The adjusting of gas flow between gas outlet 2, to achieve the purpose that the air pressure in the crankcase 200 is made to tend towards stability, institute
State lower diaphragm 40 realizes back flow of gas protection by way of convenient for gluing, sealing, therefore the Pcv valve 100 can satisfy
Engine with supercharger and when engine charge pressure stabilizing cavity pressure be higher than 200kPa when use.
It should be understood that the diameter change of one end that the spool 30 is contacted with the upper diaphragm 13 can be according to engine
Complex working condition designs, so that when engine is under certain operating condition, between the spool 30 and the upper diaphragm 13
Gap it is corresponding with operating condition, the stable gas pressure being more favorable in the crankcase 200 in this way.
Please refer to Fig. 9 to Figure 10, the Pcv valve showing in second embodiment of the invention, Pcv valve in the present embodiment with
Pcv valve in first embodiment is more or less the same, the difference is that, the Pcv valve in the present embodiment is in first embodiment
On the basis of, first valve body 11 is equipped with sealing ring 16 and abatvoix with the junction that second valve body 12 mutually fastens
17, second valve body 12 is also equipped with the sealing ring 16 and abatvoix with the junction that the lower valve body 20 mutually fastens
17.Due to gas, he is circulated by gap, when gap is too small, is easy to happen noise, is passed through the sealing ring 16 of setting
With the abatvoix 17, the overall tightness of the Pcv valve is on the one hand improved, on the other hand can also absorb noise, is reduced
Sound pollution.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (5)
1. a kind of Pcv valve, including hollow upper valve body and lower valve body, the upper valve body is mutually fastened and connected with the lower valve body,
The lower valve body is equipped with air inlet, and the upper valve body is equipped with gas outlet, which is characterized in that the Pcv valve further includes spool
And lower diaphragm, the spool adjust the air inlet and the gas outlet in a manner of the inner wall back and forth movement along the upper valve body
Between gas flow, the lower diaphragm be covered on the lower valve body it is hollow in, and when the upper valve body and the lower valve body
When being mutually fastened and connected, the upper valve body squeezes the lower diaphragm, so that the edge of the lower diaphragm and the lower valve body is interior
Wall palette, the edge of the lower diaphragm are equipped with several fixture blocks, and the inner wall of the lower valve body is equipped with several card slots, when
The lower diaphragm be covered on the lower valve body it is hollow interior when, each fixture block is arranged in the card slot, it is described on
Valve body includes the first valve body and the second valve body being mutually fastened and connected, and second valve body is fastened and connected with the lower valve body, institute
Gas outlet is stated set on the one end of first valve body far from second valve body, the air inlet is set to the lower valve body far from institute
One end of the second valve body is stated, the upper valve body further includes upper diaphragm, and the upper diaphragm is set to the hollow interior of the upper valve body, and blocks
Between first valve body and second valve body, the spool is set in second valve body, and one end of the spool
It is contained in first valve body across the upper diaphragm, the spool is along the side of the inner wall back and forth movement of first valve body
Formula adjusts the gap between the upper diaphragm, and the upper valve body further includes a reset spring, and the spool is far from described first
One end of valve body is equipped with a connecting plate, and the reset spring is sheathed on the spool, and be connected to the connecting plate with it is described
Between upper diaphragm, the upper valve body further includes return spring, and the return spring is fixedly arranged on the inner wall of first valve body, and
Close to the spool.
2. Pcv valve according to claim 1, which is characterized in that the spool is close to one end of first valve body in cone
Shape, and the spool close to first valve body one end end diameter to being gradually increased in the middle part of the spool.
3. Pcv valve according to claim 1, which is characterized in that second valve body is close to one end of first valve body
An accepting hole is opened up, second valve body opens up a receiving hole close to one end of the lower valve body, and the bottom of the receiving hole is set
There is a pillar, the accepting hole extends in the pillar, and the spool is set in the accepting hole.
4. Pcv valve according to claim 3, which is characterized in that the accepting hole is in one end of the lower valve body
Wall is tapered, and the accepting hole close to the end of described lower valve body one end inner diameter to the middle part of the accepting hole gradually
Increase.
5. Pcv valve according to claim 3, which is characterized in that the pillar is equipped with axis through-hole, the axis through-hole
It is connected to the accepting hole, the pillar offers several ventholes, institute on the side wall of one end of the receiving hole bottom
Venthole is stated to be connected to the accepting hole, when the upper valve body and the lower valve body are mutually fastened and connected, the freedom of the pillar
End squeezes the lower diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464485.3A CN107227989B (en) | 2017-06-19 | 2017-06-19 | Pcv valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464485.3A CN107227989B (en) | 2017-06-19 | 2017-06-19 | Pcv valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107227989A CN107227989A (en) | 2017-10-03 |
| CN107227989B true CN107227989B (en) | 2019-09-27 |
Family
ID=59936427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710464485.3A Active CN107227989B (en) | 2017-06-19 | 2017-06-19 | Pcv valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107227989B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881686A (en) * | 1997-09-08 | 1999-03-16 | D.L.S. Cycle Products, Inc. | Crankcase breather valve for engines with synchronous piston movement |
| DE102006025814A1 (en) * | 2006-06-02 | 2007-12-06 | Bayerische Motoren Werke Ag | Check valve for crankcase vent of internal-combustion engine, has housing with cross section geodetically tapered under opening to condensate drainage opening, where housing is made of plastic or metal, and includes ventilation opening |
| CN104295340A (en) * | 2013-07-16 | 2015-01-21 | 通用汽车环球科技运作有限责任公司 | Dual flow check valve for positive crankcase ventilation system |
| CN205677692U (en) * | 2016-06-12 | 2016-11-09 | 三河平恩康汽车技术有限公司 | A kind of Pcv valve |
| CN206054037U (en) * | 2016-09-29 | 2017-03-29 | 长城汽车股份有限公司 | Pcv valve and the electromotor with which and vehicle |
-
2017
- 2017-06-19 CN CN201710464485.3A patent/CN107227989B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881686A (en) * | 1997-09-08 | 1999-03-16 | D.L.S. Cycle Products, Inc. | Crankcase breather valve for engines with synchronous piston movement |
| DE102006025814A1 (en) * | 2006-06-02 | 2007-12-06 | Bayerische Motoren Werke Ag | Check valve for crankcase vent of internal-combustion engine, has housing with cross section geodetically tapered under opening to condensate drainage opening, where housing is made of plastic or metal, and includes ventilation opening |
| CN104295340A (en) * | 2013-07-16 | 2015-01-21 | 通用汽车环球科技运作有限责任公司 | Dual flow check valve for positive crankcase ventilation system |
| CN205677692U (en) * | 2016-06-12 | 2016-11-09 | 三河平恩康汽车技术有限公司 | A kind of Pcv valve |
| CN206054037U (en) * | 2016-09-29 | 2017-03-29 | 长城汽车股份有限公司 | Pcv valve and the electromotor with which and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107227989A (en) | 2017-10-03 |
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