CN208803887U - Snorkel and engine assembly - Google Patents

Abstract

The utility model provides a kind of snorkel and engine assembly, snorkel includes snorkel body and check valve, the both ends of snorkel body along its length are respectively set to the air inlet port for connecting Pcv valve door and the air outlet for connecting inlet manifold, check valve is mounted on snorkel body, check valve enables air inlet port unimpeded to air outlet, and air outlet is enabled to block to air inlet port.By increasing check valve on snorkel; when booster intervenes operating critical point; the Pcv valve door in pipe fitting on cylinder head cover for connecting inlet manifold is in vibrational state; it is unable to normal switching-off; and being now placed in the normal work of the check valve in snorkel can effectively prevent gas from entering crankcase; it avoids crankcase pressure from increasing, plays the role of effective protection engine.

Description

Snorkel and engine assembly

Technical field

The utility model relates to field of automobile parts and components, in particular to a kind of snorkel and engine assembly.

Background technique

Currently, engine with supercharger booster intervene critical operating point when (work when booster is in in time without The state of work), the reciprocal alternation of pressure in inlet manifold (when and positive pressure, when and negative pressure), connect cylinder head cover and inlet manifold PCV sebific duct in pressure be also variation.

Inventor has found that traditional engine with supercharger at least has the following disadvantages: during the work time under study for action

When due to booster intervention critical point work, the reciprocal alternation of pressure in PCV sebific duct will lead to, at this point, cylinder head cover The Pcv valve door of interior connection PCV sebific duct is in vibrational state (negative pressure is opened, and positive pressure is closed), can not effectively close, lead to air inlet discrimination Gas backflow leaks into crankcase after PCV sebific duct in managing, and increases the pressure in crankcase, the air pressure rapid wear bad oil of increase Envelope, leads to engine oil leakage, engine damage is resulted even in when serious.

Utility model content

The purpose of this utility model is to provide a kind of snorkels, in the pipeline to improve traditional connection Pcv valve door Gas, which easily back flows into crankcase, leads to engine impaired the problem of even damaging.

The purpose of this utility model is to provide a kind of engine assemblys, to improve the pipeline of traditional connection Pcv valve door Interior gas, which easily back flows into crankcase, leads to engine impaired the problem of even damaging.

The embodiments of the present invention are achieved in that

Based on above-mentioned first purpose, the utility model provides a kind of snorkel, and the snorkel includes:

Snorkel body, the both ends of the snorkel body along its length are respectively set to for connecting Pcv valve door Air inlet port and air outlet for connecting inlet manifold,

Check valve, the check valve are mounted on the snorkel body, and the check valve enables the air inlet port to institute It is unimpeded to state air outlet, and the air outlet is enabled to block to the air inlet port.

In the utility model preferred embodiment, the check valve has gas outlet and air inlet, the snorkel Ontology includes the first pipeline section and the second pipeline section, and the air inlet port is located at one end of first pipeline section, the air outlet position In one end of second pipeline section, the check valve is mounted between first pipeline section and second pipeline section, and it is described into Port is connected to first pipeline section adjacent to one end of second pipeline section, and it is neighbouring described that the gas outlet is connected to second pipeline section One end of first pipeline section.

In the utility model preferred embodiment, one end that the check valve is provided with the air inlet is plugged on described In first pipeline section, it is interference fitted with first pipeline section；One end that the check valve is provided with the gas outlet is plugged on described In second pipeline section, it is interference fitted with second pipeline section.

In the utility model preferred embodiment, the check valve is set as membrane one-way valve.

In the utility model preferred embodiment, the membrane one-way valve includes shell and core assembly, described Flow channel is provided in shell, the air inlet and air outlet are located at the both ends in the outer cover length direction, the stream Dynamic channel include it is continuous first circulation section, second circulation section and third circulation section, it is described first circulation section internal diameter and institute The internal diameter for stating third circulation section is respectively less than the internal diameter of the second circulation section；

The core assembly includes the first mounting blocks, the second mounting blocks and diaphragm, and first mounting blocks are located at described In first circulation section, the first recirculation hole is provided on first mounting blocks, second mounting blocks are located at third circulation In section, the second recirculation hole is provided on second mounting blocks, the diaphragm is located in the second circulation section, the diaphragm position Between first mounting blocks and second mounting blocks, the diaphragm is sealed on first recirculation hole.

In the utility model preferred embodiment, an end face of first mounting blocks is provided with positioning protrusion, described Location hole is provided on diaphragm, the diaphragm is set in outside the positioning protrusion by the location hole；Second mounting blocks An end face be provided with locating slot, the positioning protrusion is plugged in the locating slot.

In the utility model preferred embodiment, the shell includes first shell and second shell, and described first One end of shell and one end of the second shell are tightly connected, and the first shell is arranged far from the end of the second shell For the air inlet, the second shell is set as the gas outlet, first installation far from the end of the first shell Block is integrated in the first shell, and second mounting blocks are integrated in the second shell.

In the utility model preferred embodiment, the first shell is connect with first pipeline section by hoop, institute It states second shell and is connect with second pipeline section by hoop.

In the utility model preferred embodiment, the check valve is plunger type check valve.

Based on above-mentioned second purpose, the utility model provides a kind of engine assembly, including engine body and institute The snorkel stated, the Pcv valve door are mounted at the crankcase outlet of the engine body, and the air inlet port is connected to institute State Pcv valve door.

The beneficial effect of the utility model embodiment is:

In conclusion the utility model embodiment provides a kind of snorkel, and it is simple and reasonable, add convenient for manufacture Work, installation with it is easy to use, meanwhile, by increasing check valve on snorkel, when booster intervention operating critical point when, be located at It is in vibrational state for connecting the Pcv valve door in the pipe fitting of inlet manifold on cylinder head cover, is unable to normal switching-off, and position at this time Effectively gas can be prevented to enter crankcase in the check valve normal work in snorkel, avoid crankcase pressure from increasing, play The effect of effective protection engine.It is specific as follows:

Snorkel provided in this embodiment, includes snorkel body and check valve, and check valve is mounted on snorkel body On.One end of snorkel body is set as air inlet port, and the other end of snorkel body is set as air outlet, in use, logical Tracheae ontology is connected between Pcv valve door and inlet manifold, i.e., the air inlet port of snorkel body and will be integrated on cylinder head cover Pcv valve door gas outlet connection, the air outlet of snorkel body is connected to the inlet end of inlet manifold.Meanwhile unidirectionally After valve is mounted on snorkel, gas from air inlet port to air outlet that flow from can be by check valve, and from air outlet The gas for flowing to air inlet port is blocked by check valve, can not pass through check valve, such structure design, in-engine gas It can be flowed into from snorkel to inlet manifold by Pcv valve door, check valve, enter combustion chamber from inlet manifold and carry out Burning releases energy again.When engine intervenes operating critical point, Pcv valve door is in vibrational state, is unable to normal switching-off, into Barotropic state is in gas manifold, the gas in inlet manifold has the trend flowed along snorkel into crankcase, and works as When gas in inlet manifold is flowed along snorkel into crankcase, gas is flowed at the check valve on snorkel, gas Being stopped by check valve, gas can not be blocked by check valve, therefore from inlet manifold to crankcase flow passage, into Gas in gas manifold will not reversely flow to crankcase, not will cause air pressure in crankcase and increase, and engine can work normally, It is hardly damaged.

Engine assembly provided in this embodiment includes above-mentioned snorkel, has the advantages that all of above-mentioned snorkel.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is the schematic diagram of the snorkel of the utility model embodiment；

Fig. 2 is the schematic diagram of the shell of the check valve of the utility model embodiment；

Fig. 3 is the schematic cross-sectional view of the check valve of the utility model embodiment；

Fig. 4 is the schematic diagram of the diaphragm of the check valve of the utility model embodiment.

Icon: 100- snorkel body；The first pipeline section of 110-；111- air inlet port；The second pipeline section of 120-；121- Air outlet；200- check valve；210- shell；211- first shell；2111- air inlet；The first annular protrusion of 2112-； The circulation section of 2113- first；The circulation section of 2114- second；212- second shell；The gas outlet 2121-；The second convex annular of 2122- It rises；2123- third circulation section；220- core assembly；The first mounting blocks of 221-；The first recirculation hole of 2211-；2212- positioning Protrusion；The second mounting blocks of 222-；The second recirculation hole of 2221-；2222- locating slot；223- diaphragm；2231- location hole； 300- hoop.

Specific embodiment

Currently, will lead to the reciprocal alternation of pressure in PCV sebific duct, cylinder head cover when due to booster intervention critical point work The Pcv valve door of interior connection PCV sebific duct is in vibrational state (negative pressure is opened, and positive pressure is closed), can not effectively close, lead to air inlet discrimination Gas backflow leaks into crankcase after PCV sebific duct in managing, and increases the pressure in crankcase, the air pressure rapid wear bad oil of increase Envelope, leads to engine oil leakage, engine damage is resulted even in when serious.

In consideration of it, inventor devises a kind of snorkel and engine assembly, by increasing check valve on snorkel 200, the Pcv valve door in pipe fitting when booster intervenes operating critical point, on cylinder head cover for connecting inlet manifold In vibrational state, it is unable to normal switching-off, and the normal work of check valve 200 being now placed in snorkel can effectively prevent gas Body enters crankcase, and crankcase pressure is avoided to increase, and plays the role of effective protection engine.

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should be noted that the orientation of the instructions such as term " center ", "inner", "outside" or Positional relationship be based on the orientation or positional relationship shown in the drawings or the utility model product using when the side usually put Position or positional relationship, are merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply opposite Importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, the indirect phase of intermediary can also be passed through Even, it can be the connection inside two elements.For the ordinary skill in the art, can be understood with concrete condition above-mentioned The concrete meaning of term in the present invention.

It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can To be combined with each other.

Embodiment

Referring to Fig. 1, a kind of snorkel is present embodiments provided, Pcv valve door and air inlet discrimination for being connected on cylinder head cover Pipe, the gas being discharged from engine are flowed by snorkel to inlet manifold, inlet manifold connection burning behind the door by Pcv valve Room, gas are burnt again after entering combustion chamber, improve the utilization efficiency of the energy.

Referring to Fig. 1, snorkel includes snorkel body 100 and check valve 200, snorkel body in the present embodiment 100 both ends along its length are respectively set to air inlet port 111 for connecting Pcv valve door and for connecting air inlet discrimination The air outlet 121 of pipe, check valve 200 are mounted on snorkel body 100, and check valve 200 enables air inlet port 111 to outlet side Mouth 121 is unimpeded, and air outlet 121 is enabled to block to air inlet port 111.

Optional in the present embodiment, snorkel body 100 is sebific duct, and snorkel body 100 has certain elastic deformation Ability can be bent on demand, to meet the installation and use of different spatial, different usage scenarios.Snorkel body 100 can be and be made of the splicing of several sections of pipeline sections, it is clear that in other embodiments, snorkel body 100 be also possible to one at Type.

Optionally, snorkel body 100 includes the first pipeline section 110 and the second pipeline section 120, and the first pipeline section 110 is bend pipe, The substantially rectangular bend pipe of first pipe, the cross-sectional shape of the first pipeline section 110 are circular ring shape, i.e. the first pipeline section 110 is bending Round tube, the lumen of the first pipeline section 110 are cylindric.One end of first pipeline section, 110 length direction is set as air inlet port 111, uses It is connected in the gas outlet of Pcv valve door.Second pipeline section 120 is bend pipe, substantially rectangular at the crooked place of the second pipeline section 120, The cross-sectional shape of second pipeline section 120 is circular ring shape, i.e. the second pipeline section 120 is the round tube of bending, and the lumen of the second pipeline section 120 is It is cylindric.Obviously, the lumen of the first pipeline section 110 and the second pipeline section 120 can be set to equal, manufacture easy to process.

Need to illustrate when, snorkel body 100 can be processed into using existing processing method, such as be molded into Type.

Optional in the present embodiment, check valve 200 is mounted between the first pipeline section 110 and the second pipeline section 120, by the first pipe Section 110 be connected to the second pipeline section 120, and the both ends that 200 supplied gas of check valve flows are respectively air inlet 2111 and gas outlet 2121, The air inlet 2111 of check valve 200 is connected with the first pipeline section 110 far from one end of air inlet port 111, the gas outlet of check valve 200 2121 connect with the second pipeline section 120 far from one end of air outlet 121.

Further, one end of check valve 200 is plugged in the first pipeline section 110, is interference fitted with the first pipeline section 110, together The sealed connection of Shi Shixian check valve 200 and the first pipeline section 110.Similarly, the other end of check valve 200 is plugged on the second pipeline section In 120, it is interference fitted with the second pipeline section 120, while realizing the sealed connection of check valve 200 and the second pipeline section 120.

Optionally, check valve 200 can be set to membrane one-way valve 200.

For example, check valve 200 includes shell 210 and core assembly 220.Core assembly 220 is mounted on shell 210 Interior, shell 210 is mounted between the first pipeline section 110 and the second pipeline section 120.

Referring to Fig. 2, optional, shell 210 is set as segmented, and shell 210 includes 211 He of first shell of tubulose The second shell 212 of tubulose.First shell 211 is circular tube shaped, and one end of first shell 211 is set as air inlet 2111, first There is shell 211 outer peripheral surface of one end of air inlet 2111 to be provided with first annular raised 2112, first annular raised 2112 Round table-like, first annular raised 2112 outer diameter along its length positioned at one end of 2111 place end face of air inlet is less than another First shell 211 is inserted in the first pipeline section 110 by the outer diameter at end using first annular raised 2112.First shell 211 Lumen include it is continuous first circulation section 2113 and second circulation section 2114, second circulation section 2114 far from air inlet 2111 Setting, the internal diameter of the second circulation section 2114 are greater than the internal diameter of the first circulation section 2113.

Second shell 212 is circular tube shaped, and one end of second shell 212 is set as gas outlet 2121, and second shell 212 has The outer peripheral surface of one end of gas outlet 2121 is provided with the second annular protrusion 2122, the second annular protrusion 2122 be it is round table-like, second Outer diameter of the annular protrusion 2122 along its length positioned at one end of 2121 place end face of gas outlet is less than the outer diameter of the other end, benefit It is convenient for for second shell 212 being inserted in the second pipeline section 120 with the second annular protrusion 2122.The lumen of second shell 212 is arranged Internal diameter for third circulation section 2123, the second circulation section 2114 is greater than the internal diameter of third circulation section 2123.

When installation, first shell 211 and second shell 212 can be by being welded and fixed, and second shell 212 is sealed on first Shell 211 has the end of the second circulation section 2114, i.e. the lumen of shell 210 includes continuous first circulation section 2113, second The internal diameter of the section 2114 that circulates and third circulation section 2123, the first circulation section 2113 and third circulation section 2123 is respectively less than the second circulation The internal diameter of section 2114.

Obviously, first shell 211 can also be connected with second shell 212 by helicitic texture.

Optionally, core assembly 220 includes the first mounting blocks 221, the second mounting blocks 222 and diaphragm 223.

Referring to Fig. 3, the first mounting blocks 221 are cylindrical body, the medium position of an end face of the first mounting blocks 221 is provided with Positioning protrusion 2212, positioning protrusion 2212 can be cylindrical body, the length direction of positioning protrusion 2212 and the first mounting blocks 221 Axis direction is parallel, and the first recirculation hole for penetrating through the first mounting blocks 221 along its length is provided on the first mounting blocks 221 2211, the first recirculation hole 2211 can be cylindrical hole, and the quantity of the first recirculation hole 2211 is arranged on demand, multiple first recirculation holes The 2211 axis uniform intervals for surrounding the first mounting blocks 221 are arranged.In other embodiments, the first recirculation hole 2211 can not be Cylindrical hole.

Second mounting blocks 222 are cylindrical body, and the medium position of an end face of the second mounting blocks 222 is provided with locating slot 2222, positioning protrusion 2212 can be cylinder groove, and the groove depth direction of locating slot 2222 and the axis direction of the second mounting blocks 222 are flat Row, is provided with the second recirculation hole 2221 for penetrating through the second mounting blocks 222 along its length on the second mounting blocks 222, and second Recirculation hole 2221 can be cylindrical hole, and the quantity of the second recirculation hole 2221 is arranged on demand, and multiple second recirculation holes 2221 surround The axis uniform intervals of second mounting blocks 222 are arranged.In other embodiments, the second recirculation hole 2221 can not be cylinder Hole.

Referring to Fig. 4, diaphragm 223 be resistance to oil gas rubber system at circular piece, the medium position of diaphragm 223 is provided with positioning Hole 2231, location hole 2231 are cylindrical hole, are matched with positioning protrusion 2212.

Referring to Fig. 3, first the first mounting blocks 221 are mounted in first shell 211 when membrane one-way valve 200 is installed, it is excellent Choosing, the first mounting blocks 221 are integrated in first shell 211, and the outer peripheral surfaces of the first mounting blocks 221 is interior with first shell 211 Wall is tightly connected, and is then set in diaphragm 223 outside positioning protrusion 2212 using its location hole 2231, the second mounting blocks 222 peace In second shell 212, it is preferred that the second mounting blocks 222 are integrated in second shell 212, the periphery of the second mounting blocks 222 The inner wall of face and second shell 212 is tightly connected, then first shell 211 and second shell 212 are docked, and passes through the side of welding Formula realization first shell 211 is fixedly connected with second shell 212, close at 212 link position of first shell 211 and second shell Envelope connection.After being installed, the first mounting blocks 221 are located in the first circulation section 2113, and diaphragm 223 is located at the first mounting blocks 221 And second between mounting blocks 222, and diaphragm 223 is located in the second circulation section 2114, diaphragm 223 is sealed on the first recirculation hole 2211 On, the second mounting blocks 222 are located in third circulation section 2123, and one end of the second mounting blocks 222 is pushed against being provided with for diaphragm 223 Around location hole 2231.

Referring to Fig. 3, the course of work of the membrane one-way valve 200 is, gas flows to third stream from the first circulation section 2113 When logical section 2123 flows, gas can push the part that diaphragm 223 is not pushed against by the second mounting blocks 222 open, at this point, diaphragm 223 is beaten The first recirculation hole 2211 is opened, gas can pass through core assembly 220, and flow out from the second recirculation hole 2221.When gas from Third circulates section 2123 to when the first circulation flowing of section 2113, and the pressure of gas acts on diaphragm 223, makes diaphragm 223 more So close that be fitted on the end face of the first mounting blocks 221, diaphragm 223 closes the first recirculation hole 2211, and gas can not pass through Core assembly 220 realizes the effect of one-way ventilating.When installing check valve 200, the air inlet 2111 of first shell 211 It is connected to the first pipeline section 110, the gas outlet 2121 of second shell 212 is connected to the second pipeline section 120.

Obviously, in other embodiments, check valve 200 can also be other valve mechanisms for realizing one-way flow, example Such as plunger type check valve 200, Pcv valve etc..

It should be noted that shell 210 can adopt it is made of plastic.It can be in first shell 211 and second shell 212 Metal connecting piece is fixed respectively, and first shell 211 and second shell 212 are welded and fixed by metal connecting piece.

In other embodiments, in order to further increase the connection of shell 210 and snorkel body 100, shell 210 and logical It is fastenedly connected at the link position of tracheae ontology 100 by hoop 300, i.e. the connection position of first shell 211 and the first pipeline section 110 Place is set to connect using hoop 300, second shell 212 and the second pipeline section 120 connect by hoop 300 or shell 210 with ventilate It is bonded at the link position of tube body 100 by glue, or the structure connection reinforced using other.

Snorkel provided in this embodiment, by installing check valve 200, in-engine gas in snorkel body 100 Body can be flowed into from snorkel body 100 to inlet manifold by Pcv valve door, check valve 200, be entered from inlet manifold It is burnt and is released energy again to combustion chamber.When engine intervenes operating critical point, Pcv valve door is in vibrational state, no Can normal switching-off, barotropic state is in inlet manifold, the gas in inlet manifold has along snorkel body 100 to crankshaft The trend flowed in case, and when the gas in inlet manifold is flowed along snorkel body 100 into crankcase, gas flowing At check valve 200 on to snorkel body 100, gas is stopped by check valve 200, gas can not by check valve 200, Therefore, it is blocked from inlet manifold to crankcase flow passage, the gas in inlet manifold will not reversely flow to crankcase, will not Air pressure in crankcase is caused to increase, engine can be worked normally, is hardly damaged.

Embodiment

Present embodiments provide a kind of engine assembly, including engine body and ventilation provided by the above embodiment Pipe, Pcv valve door are mounted at the crankcase outlet of engine body, and the air inlet port 111 of snorkel body 100 is connected to PCV The gas outlet of valve.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of snorkel, which is characterized in that the snorkel includes:

Snorkel body, the both ends of the snorkel body along its length be respectively set to for connect Pcv valve door into Gas port and air outlet for connecting inlet manifold,

Check valve, the check valve are mounted on the snorkel body, the check valve enable the air inlet port to it is described go out Gas port is unimpeded, and the air outlet is enabled to block to the air inlet port.

2. snorkel according to claim 1, which is characterized in that the check valve has gas outlet and air inlet, institute Stating snorkel body includes the first pipeline section and the second pipeline section, and the air inlet port is located at one end of first pipeline section, it is described out Gas port is located at one end of second pipeline section, and the check valve is mounted between first pipeline section and second pipeline section, And the air inlet is connected to first pipeline section adjacent to one end of second pipeline section, the gas outlet is connected to second pipeline section One end of neighbouring first pipeline section.

3. snorkel according to claim 2, which is characterized in that insert one end that the check valve is provided with the air inlet It connects in first pipeline section, is interference fitted with first pipeline section；It inserts one end that the check valve is provided with the gas outlet It connects in second pipeline section, is interference fitted with second pipeline section.

4. snorkel according to claim 2, which is characterized in that the check valve is set as membrane one-way valve.

5. snorkel according to claim 4, which is characterized in that the membrane one-way valve includes shell and spool group Part is provided with flow channel in the shell, and the air inlet and air outlet are located at the both ends in the outer cover length direction, The flow channel include it is continuous first circulation section, second circulation section and third circulation section, it is described first circulation section it is interior Diameter and the internal diameter of third circulation section are respectively less than the internal diameter of the second circulation section；

The core assembly includes the first mounting blocks, the second mounting blocks and diaphragm, and first mounting blocks are located at described first In the section that circulates, the first recirculation hole is provided on first mounting blocks, second mounting blocks are located in third circulation section, The second recirculation hole is provided on second mounting blocks, the diaphragm is located in the second circulation section, and the diaphragm is located at institute It states between the first mounting blocks and second mounting blocks, the diaphragm is sealed on first recirculation hole.

6. snorkel according to claim 5, which is characterized in that an end face of first mounting blocks is provided with convex It rises, location hole is provided on the diaphragm, the diaphragm is set in outside the positioning protrusion by the location hole；Described second One end face of mounting blocks is provided with locating slot, and the positioning protrusion is plugged in the locating slot.

7. according to snorkel described in claim 5 or 6, which is characterized in that the shell includes first shell and second One end of shell, one end of the first shell and the second shell is tightly connected, and the first shell is far from described second The end of shell is set as the air inlet, and the second shell is set as the outlet far from the end of the first shell Mouthful, first mounting blocks are integrated in the first shell, and second mounting blocks are integrated in the second shell.

8. snorkel according to claim 7, which is characterized in that the first shell and first pipeline section pass through hoop Connection, the second shell are connect with second pipeline section by hoop.

9. snorkel according to claim 1, which is characterized in that the check valve is plunger type check valve.

10. a kind of engine assembly, which is characterized in that including engine body and according to claim 1 any one of -9 institute The snorkel stated, the Pcv valve door are mounted at the crankcase outlet of the engine body, and the air inlet port is connected to institute State Pcv valve door.