CN107227989A

CN107227989A - PCV valve

Info

Publication number: CN107227989A
Application number: CN201710464485.3A
Authority: CN
Inventors: 黄旋
Original assignee: Jiangxi Changhe Automobile Co Ltd
Current assignee: Jiangxi Changhe Automobile Co Ltd
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2017-10-03
Anticipated expiration: 2037-06-19
Also published as: CN107227989B

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 provided with air inlet, the upper valve body is provided with gas outlet, the Pcv valve also includes valve element and lower diaphragm, the valve element adjusts the gas flow between the air inlet and the gas outlet in the way of the inwall 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 extrudes the lower diaphragm, so that the edge of the lower diaphragm is fitted with the inner wall sealing of the lower valve body.Pcv valve in the present invention; the valve element realizes the regulation to the gas flow between the air inlet and the gas outlet by way of the inwall 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

Pcv valve

Technical field

The present invention relates to automotive engineering neighborhood, more particularly to a kind of Pcv valve.

Background technology

Among the process of running car, engine can produce gas blowby and be flowed into crankcase, originally crankcase pressure Control system (i.e. crankcase is directly connected with air) by way of gravity-flow ventilation discharges the gas blowby of engine, to ensure song Stable gas pressure inside axle box.Constantly advocated with the theory of energy-conserving and environment-protective, it is most of at present using pressure of the Pcv valve to crankcase Power is controlled, and Pcv valve is generally connected with crankcase and inlet manifold voltage stabilizing cavity, and crankcase will be interior by the regulation and control of Pcv valve Portion's gas blowby is sent back in engine again.

However, among prior art, conventional Pcv valve has plunger type and diaphragm type, when being used in engine with supercharger and work as When engine charge voltage stabilizing cavity pressure is higher than 200kPa, plunger type Pcv valve lacks the design of back flow of gas protection, will appear from higher Inverted draft amount (10~20l/min) be inversely flowed into crankcase, cause crankcase pressure substantially to increase, lose crankcase Pressure adjusting function, and diaphragm type PCV valve lacks the regulation and control of throughput, it is impossible to adapt to engine with supercharger complex working condition and form non- Linear Stress control.

The content of the invention

Based on this, it is an object of the invention to provide a kind of Pcv valve with throughput regulation and control and back flow of gas protection.

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 Connect, the lower valve body is provided with air inlet, the upper valve body is provided with gas outlet, and the Pcv valve also includes valve element and lower diaphragm, The valve element adjusts the gas between the air inlet and the gas outlet in the way of the inwall back and forth movement along the upper valve body Body flow, the lower diaphragm is covered on the hollow interior of the lower valve body, and when the upper valve body is mutually fastened with the lower valve body During connection, the upper valve body extrudes the lower diaphragm, so that the edge of the lower diaphragm and the inner wall sealing of the lower valve body are pasted Close.

Above-mentioned Pcv valve, by the valve element and the lower diaphragm of setting, when the gas of crankcase enters from the air inlet Fashionable, gas will be sent to the extruding lower diaphragm, and edge and the lower valve body by the lower diaphragm caused by extruding Gap between inwall is entered in the upper valve body, and now gas will promote inwall of the valve element along the upper valve body to transport It is dynamic, cause the gap between the valve element and the upper valve body to send change, so that the flow of gas is adjusted, when inlet manifold is steady When pressing the pressure in cavity higher than crankcase, now gas will be inversely flowed into the upper valve body from the gas outlet, be passed through Gap between the valve element and the upper valve body is entered in the lower valve body, and now gas is by lower film described in forward extrusion Piece, the edge of the lower diaphragm by with the inwall 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 located at the one end of first valve body away from second valve body, institute Air inlet is stated located at the one end of the lower valve body away from second valve body.

Further, the upper valve body also includes upper diaphragm, and the upper diaphragm blocks located at the hollow interior of the upper valve body Between first valve body and second valve body, the valve element is in second valve body, and one end of the valve element It is contained in through the upper diaphragm in first valve body, the valve element is with along the side of the inwall back and forth movement of first valve body Formula adjusts the gap between the upper diaphragm.

Further, the upper valve body also includes a back-moving spring, and the one end of the valve element away from first valve body is set There is a connecting plate, the back-moving spring is sheathed on the valve element, and is connected between the connecting plate and the upper diaphragm.

Further, the valve element is tapered close to one end of first valve body, and the valve element is close to described first The end diameter of valve body one end gradually increases to the middle part of the valve element.

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 provided with a projection, and the accepting hole is extended to In the projection, the valve element is in the accepting hole.

Further, inwall 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 gradually increases to the middle part of the accepting hole.

Further, the projection is provided with axis through-hole, and the axis through-hole is connected with the accepting hole, the projection Some passages are offered on the side wall of one end of the receiving hole bottom, the passage is connected with the accepting hole, When the upper valve body is mutually fastened and connected with the lower valve body, the free terminal of the projection extrudes the lower diaphragm.

Further, the edge of the lower diaphragm is provided with several fixture blocks, and the inside of the lower valve body is provided with several Neck, when the lower diaphragm be covered on the lower valve body it is hollow interior when, each fixture block is arranged in a neck.

Further, the upper valve body also includes return spring, and the return spring is fixedly arranged on the interior of first valve body On wall, and close to the valve element.

Brief description of the drawings

Fig. 1 be first embodiment of the invention in Pcv valve mounting structure schematic diagram.

Fig. 2 is the mplifying structure schematic diagram at I in Fig. 1.

Fig. 3 be first embodiment of the invention in Pcv valve stereochemical structure exploded view.

Fig. 4 is the mplifying structure schematic diagram at II in Fig. 3.

Fig. 5 be first embodiment of the invention in Pcv valve another angle stereochemical structure exploded view.

Fig. 6 be first embodiment of the invention in Pcv valve three-dimensional structure diagram.

Fig. 7 be first embodiment of the invention in the second valve body three-dimensional structure diagram.

Fig. 8 be first embodiment of the invention in Pcv valve cross-sectional view.

Fig. 9 be second embodiment of the invention in Pcv valve cross-sectional view.

Figure 10 is the mplifying structure schematic diagram at III in Fig. 9.

Main element symbol description：

Following embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.

Embodiment

For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing Give some embodiments of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes The embodiment of description.On the contrary, the purpose that these embodiments are provided be make to the disclosure more it is thorough comprehensively.

It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ", " right side " and similar statement are for illustrative purposes only.

Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases The arbitrary and all combination of the Listed Items of pass.

Fig. 1 to Fig. 2 is referred to, the mounting structure schematic diagram for the Pcv valve showing in first embodiment of the invention is described Pcv valve 100 is connected between crankcase 200 and inlet manifold voltage stabilizing cavity 300, and the crankcase 200 passes through the Pcv valve The gas blowby that engine with supercharger is produced is expelled back into the inlet manifold voltage stabilizing cavity 300 by 100 regulation and control, then the air inlet discrimination These gas blowbies are expelled back into engine by pipe voltage stabilizing cavity 300 again again to be recycled.

Fig. 3 to Fig. 8 is referred to, the Pcv valve 100 in first embodiment of the invention, including upper valve body 10, lower valve body is shown 20th, valve element 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 provided with air inlet 1, and the lower valve body 20 is provided 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 with the inwall of the inlet manifold voltage stabilizing cavity 300.

The upper valve body 10 includes the first valve body 11, the second valve body 12, upper matrix 13, back-moving 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 located at the one end of first valve body 11 away 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 provided with a projection 1221, The accepting hole 121 is extended in the projection 1221, and inwall 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 one end of lower valve body 20 inner diameter to the middle part of the accepting hole 121 Gradually increase.The projection 1221 is provided with axis through-hole 12211, and the axis through-hole 12211 connects with the accepting hole 121 Logical, the projection 1221 offers some passages 12212 on the side wall of one end of the bottom of receiving hole 122, described Passage 12212 is connected with the accepting hole 121.

Wherein, the upper matrix 13 is located at the hollow interior of the upper valve body 10, and is arranged in first valve body 11 and institute State between the second valve body 12.

Wherein, the back-moving spring 14 is 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 casing of the crankcase 200, and the inwall of the lower valve body 20 is provided with some Individual neck 21, the air inlet 1 is located at the one end of the lower valve body 20 away from second valve body 12.

The valve element 30 adjusted in the way of the inwall back and forth movement along the upper valve body 10 air inlet 1 with it is described go out Gas flow between gas port 2.Specifically, the valve element 30 is in the accepting hole 121, and one end of the valve element 30 is passed through The upper diaphragm 13 is contained in first valve body 11, and close to the return spring 15, and the valve element 30 is away from described the One end of one valve body 11 is provided with a connecting plate 31, and the connecting plate 31 is stuck on the inwall of the accepting hole 121, the reset bullet Spring 14 is sheathed on the valve element 30, and is connected between the connecting plate 31 and the upper diaphragm 13.The valve element 30 is close One end of first valve body 11 is tapered, and the valve element 30 close to described one end of first valve body 11 end diameter to described The middle part of valve element 30 gradually increases, and the valve element 30 is adjusted and institute in the way of the inwall back and forth movement along first valve body 11 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 provided with several fixture blocks 41, the quantity of the fixture block 41 and the quantity of the neck 21 Correspondence, the lower diaphragm 40 is covered on the hollow interior of the lower valve body 20, and each fixture block 41 is arranged in a card In groove 21.When the upper valve body 10 and the lower valve body 20 are mutually fastened and connected, the projection 1221 of the upper valve body 10 Free terminal extrude the lower diaphragm 40 so that the edge of the lower diaphragm 40 and the inner wall sealing of the lower valve body 20 are pasted Close.

Further, spline 12213 is additionally provided with the lateral wall of the projection 1221, the spline 12213 is used to assist a ruler in governing a country Extrude the lower diaphragm 40.

The Pcv valve 100 is when specifically used：It is now described when the engine with supercharger is in partial load condition The air pressure of crankcase 200 is more than the air pressure in the inlet manifold voltage stabilizing cavity 300, and the gas of the crankcase 200 will be from institute State air inlet 1 to enter, lower diaphragm 40 described in reverse extrusion, the lower diaphragm 40 recoverable deformation, cause institute by gas occurs The generation gap between the edge of lower diaphragm 40 and the inwall of the lower valve body 20 is stated, gas enters the lower valve by gap In the cavity that body 20 is formed with second valve body 12, then gas passes through the passage 12212 and the accepting hole 121 again Enter in second valve body 12, and promote inwall of the valve element 30 along first valve body 11 to move up, gas will pass through Gap between the valve element 30 and the upper diaphragm 13 is entered in first valve body 11, and eventually through the gas outlet 2 are flowed into the inlet manifold voltage stabilizing cavity 300, when valve element 30 is moved up described in gas push, and the valve element 30 will be extruded The back-moving spring 14 and the return spring 15 (return spring 15 is just extruded when moving up big), when air pressure reduces, In the presence of the back-moving spring 14 and the return spring 15, the valve element 30 will be promoted to reset；

It should be understood that due to the valve element 30 close to one end of first valve body 11 diameter from end to middle part by Cumulative big, therefore when the amount of moving up of valve element 30 described in gas push is bigger, its gap between the upper diaphragm 13 is smaller, Gas flow is smaller.Therefore when the pressure difference between the crankcase 200 and the inlet manifold voltage stabilizing cavity 300 is smaller, it is described The amount of moving up of valve element 30 is smaller, and gas flow is larger.When between the crankcase 200 and the inlet manifold voltage stabilizing cavity 300 Pressure difference it is larger when, the amount of moving up of the valve element 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 now air pressure in the inlet manifold voltage stabilizing cavity 300 (being higher than 200kPa) is more than the air pressure of the crankcase 200, and the gas of the inlet manifold voltage stabilizing cavity 300 will be from the air inlet Mouth 1 inversely enters first valve body 11, and the gas inversely entered will reversely promote the valve element 30 along first valve body 11 Inwall move down, until the connecting plate 31 is stuck on the inwall of the accepting hole 121, at the same gas by the valve element 30 with Gap between the upper diaphragm 13 will be inversely entered 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 more seals the inwall with the lower valve body 20 Laminating, gas will be stopped by the lower diaphragm 40, it is impossible to entered in the crankcase 200, do not influenceed by the air inlet 1 Air pressure in the crankcase 200.

To sum up, the Pcv valve 100 among the above embodiment of the present invention, passes through the valve element 30 and the lower diaphragm of setting 40, the valve element 30 realized by way of the inwall back and forth movement along the upper valve body 10 to the air inlet 1 with it is described The regulation of gas flow between gas outlet 2, so as to reach the purpose for making the air pressure in the crankcase 200 tend towards stability, institute State lower diaphragm 40 realizes back flow of gas protection by way of being easy to gluing, sealing, therefore the Pcv valve 100 disclosure satisfy that Engine with supercharger and when engine charge voltage stabilizing cavity pressure be higher than 200kPa when use.

It should be understood that the diameter change of one end that the valve element 30 is contacted with the upper diaphragm 13 can be according to engine Complex working condition is designed, so that when engine is under certain operating mode, between the valve element 30 and the upper diaphragm 13 Gap it is corresponding with operating mode, be so more favorable for the stable gas pressure in the crankcase 200.

Refer to Fig. 9 to Figure 10, show Pcv valve among the Pcv valve in second embodiment of the invention, the present embodiment with Pcv valve among first embodiment is more or less the same, and difference is, the Pcv valve among 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 is mutually fastened 17, second valve body 12 is also equipped with the sealing ring 16 and abatvoix with the junction that the lower valve body 20 is mutually fastened 17.Due to gas, he is circulated by gap, when gap is too small, easily occurs noise, passes 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 noise can be also absorbed, reduced Sound pollutes.

Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one 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 the guarantor of the present invention Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims

1. a kind of Pcv valve, including hollow upper valve body and lower valve body, the upper valve body are mutually fastened and connected with the lower valve body, The lower valve body is provided with air inlet, and the upper valve body is provided with gas outlet, it is characterised in that the Pcv valve also includes valve element And lower diaphragm, the valve element adjusts the air inlet and the gas outlet in the way of the inwall 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 extrudes the lower diaphragm, so that the edge of the lower diaphragm and the lower valve body is interior Wall palette.

2. Pcv valve according to claim 1, it is characterised in that the upper valve body includes the first valve being mutually fastened and connected Body and the second valve body, second valve body are fastened and connected with the lower valve body, and the gas outlet is located at first valve body One end away from second valve body, the air inlet is located at the one end of the lower valve body away from second valve body.

3. Pcv valve according to claim 2, it is characterised in that the upper valve body also includes upper diaphragm, the upper diaphragm is set In the upper valve body it is hollow in, and be stuck between first valve body and second valve body, the valve element is located at described the In two valve bodies, and one end of the valve element is contained in first valve body through the upper diaphragm, and the valve element is with along described The mode of the inwall back and forth movement of first valve body adjusts the gap between the upper diaphragm.

4. Pcv valve according to claim 3, it is characterised in that the upper valve body also includes a back-moving spring, the valve element One end away from first valve body is provided with a connecting plate, and the back-moving spring is sheathed on the valve element, and is connected to described Between connecting plate and the upper diaphragm.

5. Pcv valve according to claim 3, it is characterised in that the valve element is close to one end of first valve body in cone Shape, and end diameter of the valve element close to described first valve body one end gradually increase to the middle part of the valve element.

6. Pcv valve according to claim 3, it is characterised 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 projection, the accepting hole is extended in the projection, the valve element is in the accepting hole.

7. Pcv valve according to claim 6, it is characterised 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.

8. Pcv valve according to claim 6, it is characterised in that the projection is provided with axis through-hole, the axis through-hole Connected with the accepting hole, the projection offers some passages, institute on the side wall of one end of the receiving hole bottom Passage is stated to connect with the accepting hole, when the upper valve body is mutually fastened and connected with the lower valve body, the freedom of the projection End extrudes the lower diaphragm.

9. Pcv valve according to claim 1, it is characterised in that the edge of the lower diaphragm is provided with several fixture blocks, described The inwall of lower valve body is provided with several necks, when the lower diaphragm be covered on the lower valve body it is hollow interior when, it is each described Fixture block is arranged in a neck.

10. Pcv valve according to claim 3, it is characterised in that the upper valve body also includes return spring, the return Spring is fixedly arranged on the inwall of first valve body, and close to the valve element.