CN218845184U - Carbon tank cleaning valve, fuel evaporation and discharge system and vehicle - Google Patents

Abstract

The application discloses carbon tank purge valve includes: a housing (100) defining a cavity and including an inlet end for admitting fuel vapor and an outlet end for allowing the exit of fuel vapor; the valve seat (200) is arranged at the air outlet end of the shell (100) and is provided with a valve seat opening (210); a diaphragm assembly (300) movable between a closed position closing the seat opening (210) and an open position opening the seat opening (210); a drive (400) capable of driving the diaphragm assembly (300) to move between the closed position and the open position; wherein the diaphragm assembly (300) comprises a main body (310) capable of closing the valve seat opening (210), and at least two elastically deformable legs (320) connected to the main body (310), the free end (321) of each leg (320) being fixed with respect to the housing (100). The application also discloses a fuel evaporative emission system and a vehicle.

Description

Carbon tank cleaning valve, fuel evaporation and discharge system and vehicle

Technical Field

The utility model relates to a carbon tank cleaning valve, in addition to a fuel evaporation and discharge system, which comprises a carbon tank and the carbon tank cleaning valve; the utility model discloses still relate to a vehicle, it includes this kind of fuel evaporative emission system.

Background

Motor vehicles are known in the prior art that include a fuel evaporative emission system that includes a canister and a canister purge valve, the inlet end of which communicates with the canister and the outlet end of which communicates with the intake manifold of the engine to deliver fuel vapors from the canister to the engine as needed for combustion, thereby allowing for full use of the fuel, cost savings, and environmental friendliness.

The canister purge valve may include a valve seat provided at an outlet end of the canister purge valve, the valve seat being provided with a valve seat opening, the canister purge valve may further include a diaphragm for opening and closing the valve seat opening according to actual needs. In the prior art, for example, a control valve disclosed in chinese patent publication No. CN206432099U, to which reference is made in conjunction with fig. 1 of the prior patent document, in order to guide the movement of the diaphragm between the open position and the closed position, a plurality of guide posts are generally provided on the valve seat to guide the movement of the diaphragm. However, with use, the portions of the guide posts that contact the diaphragm wear due to friction, for example, recesses are created at these portions, so that the movement of the diaphragm is not smoothly and evenly guided, so that there is a risk of the diaphragm tilting or shifting, and therefore the diaphragm not closing the valve seat opening well, resulting in a risk of fuel vapor leakage. In addition, such guide posts also create frictional resistance to the diaphragm, such that the diaphragm cannot move smoothly between the open and closed positions, which is detrimental to the robust operation of the canister purge valve.

SUMMERY OF THE UTILITY MODEL

To this end, according to an aspect of the present invention, a canister purge valve is provided, the canister purge valve comprising:

a housing defining a cavity and including an inlet end for admitting fuel vapor and an outlet end for allowing fuel vapor to exit;

the valve seat is arranged at the air outlet end of the shell and is provided with a valve seat opening;

a diaphragm assembly movable between a closed position closing the valve seat opening and an open position opening the valve seat opening;

a drive device capable of driving the diaphragm assembly to move between the closed position and the open position;

wherein the diaphragm assembly comprises a body capable of closing the valve seat opening, and at least two resiliently deformable legs connected to the body, the free end of each leg being fixed relative to the housing.

Thus, in the canister purge valve according to the present invention, by providing at least two elastically deformable support legs connected to the main body of the diaphragm assembly and having free ends fixed relative to the housing of the canister purge valve, it is possible to guide the diaphragm assembly to move between the closed position of the closed valve seat opening and the open position of the open valve seat opening by the elastic deformation of the support legs, so that it is not necessary to provide a guide post as in the prior art. This ensures a smooth and even movement of the diaphragm assembly, ensuring that the diaphragm assembly does not experience any tilting or displacement when moving up and down, thereby enabling its body to tightly close the valve seat opening in the closed position, achieving an effective seal against the valve seat opening, preventing any leakage. Furthermore, the elimination of the guide post also allows for simplified construction of the valve seat, which therefore allows for simplified design, manufacture and assembly of the valve seat, increasing cost effectiveness.

In some embodiments, the carbon canister purge valve of the present disclosure may further include one or more of the following further improvements.

In some embodiments, the drive device is an electromagnetic drive device including a drive component disposed in the housing and a driven component disposed in the body of the diaphragm assembly. The use of an electromagnetic drive and the provision of its driven part in the body of the diaphragm assembly allows good drive of the diaphragm assembly to be achieved with a very compact overall construction.

In some embodiments, the drive device further comprises a resilient return member disposed between the driven component and the drive component, wherein: when the driving device is not operated, the diaphragm assembly is supported by the elastic reset component to close the valve seat opening; the diaphragm assembly is moved toward the drive member to open the valve seat opening when the drive device is operated. The resilient return member thereby allows the diaphragm assembly and hence the main body of the diaphragm assembly to be supported as securely closing the valve seat opening as required, and also allows the diaphragm assembly to be quickly returned to the closed position during switching of the drive means from the operative state to the inoperative state.

In some embodiments, the legs extend from an edge of the body. This allows the legs to be made integral with the body, which facilitates simplified manufacture, saves assembly processes, and facilitates a more robust diaphragm assembly.

In some embodiments, the legs are symmetrically arranged around the body.

In some embodiments, the diaphragm assembly includes two legs disposed opposite each other.

This allows for a balanced guidance of the body by the deformable legs, further facilitating ensuring a closing and sealing effect of the body against the valve seat opening and ensuring stable operation of the canister purge valve.

In some embodiments, the free ends of the legs snap into the housing. This allows the free ends of the legs to be secured in the housing in a simple manner.

In some embodiments, each of the legs is provided with a material cutout. This contributes to increasing the flexibility of the legs to facilitate their elastic deformation and thus to achieve a guiding of the diaphragm assembly in a smoother manner.

In some embodiments, the body of the diaphragm assembly includes a receptacle for receiving the driven member. This allows the available space of the body to be fully utilized, which is advantageous for compactness.

In some embodiments, the body of the diaphragm assembly is provided with a protrusion on a side facing the drive member. Such a projection can have a vibration damping effect, so that the diaphragm assembly holding the driven part does not come to a hard stop on, for example, the skeleton of the drive device when moving from the closed position to the open position, thereby ensuring a more robust operation, and this allows a significant reduction in operating noise.

In some embodiments, the body of the diaphragm assembly is an elastically deformable body. This elastic deformability contributes to achieving a better sealing of the valve seat opening.

According to the utility model discloses an on the other hand still provides a fuel evaporative emission system, it includes the carbon tank and as above the carbon tank purge valve, the carbon tank purge valve the inlet end with the carbon tank intercommunication, the carbon tank purge valve give vent to anger the end and communicate with the air intake manifold of engine.

According to another aspect of the present invention, there is also provided a vehicle including the fuel evaporative emission system as described above.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from the drawings without inventive effort. In the drawings:

fig. 1 schematically illustrates a front view of a proposed canister purge valve according to an embodiment of the present invention, with a diaphragm assembly in a closed position;

fig. 2 schematically illustrates a front view of a proposed canister purge valve according to an embodiment of the present disclosure, with a diaphragm assembly in an open position;

fig. 3 schematically illustrates a top view of a diaphragm assembly of a carbon canister purge valve in accordance with an embodiment of the present invention.

List of reference numerals

10. Carbon tank cleaning valve

100. Shell body

200. Valve seat

210. Valve seat opening

300. Diaphragm assembly

310. Main body

311. Protrusion

312. Lower sheet

313. Upper piece

314. Intermediate pillar part

320. Supporting leg

321. Free end

322. Material hollowing

323. Main body part

400. Drive device

410. Driven member

420. Elastic reset component

Detailed Description

Hereinafter, a canister purge valve according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. To make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure.

Thus, the following detailed description of the embodiments of the present disclosure, presented in conjunction with the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The singular forms include the plural unless the context otherwise dictates otherwise. Throughout the specification, the terms "comprises," "comprising," "has," "having," "includes," "including," "having," "including," and the like are used herein to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

In addition, even though terms including ordinal numbers such as "first", "second", etc., may be used to describe various elements, the elements are not limited by the terms, and the terms are used only to distinguish one element from another. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component, without departing from the scope of the present disclosure.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally placed when the disclosed products are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of describing and simplifying the present disclosure, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure.

As shown in fig. 1-3, a canister purge valve 10 is provided according to one aspect of the present invention, which may be used in a fuel evaporative emissions system for a motor vehicle. For example, the inlet end of the canister purge valve 10 may be in communication with a canister of a fuel evaporative emissions system, and the outlet end of the canister purge valve 10 may be in communication with an intake manifold of the engine to deliver fuel vapors from the canister to the engine for combustion as required by the motor vehicle.

As shown in fig. 1-3, according to one embodiment, the canister purge valve 10 of the present disclosure may include a housing 100, a valve seat 200, a diaphragm assembly 300, and a drive device 400. The housing 100 may define a cavity therein and include an inlet end that allows fuel vapor to enter the cavity and an outlet end that allows fuel vapor to exit the cavity. The valve seat 200 is then placed at the outlet end of the housing 100, and a valve seat opening 210 is provided in the valve seat 200, the valve seat opening 210 being for example centrally provided in the valve seat 200, and the valve seat opening 210 allowing fuel vapour to leave the cavity defined by the housing 100 therethrough when open. The diaphragm assembly 300 is configured to move between a closed position, in which the diaphragm assembly 300 is able to close the valve seat opening 210 of the valve seat 200, and an open position, in which the diaphragm assembly 300 allows the valve seat opening 210 of the valve seat 200 to open. More specifically, the diaphragm assembly 300 may be provided with a body 310, the body 310 being configured to be able to close the valve seat opening 210 of the valve seat 200. In a particular embodiment, the body 300 is an elastically deformable body 300, which allows the body 300 to achieve a good seal against the valve seat opening 210. For example, the main body 300 may be configured to be made of rubber, or made of an elastic metal sheet. The driving device 400 is configured to drive the diaphragm assembly 300 to move between the closed position and the open position. In this embodiment, the diaphragm assembly 300 may be configured to further include at least two elastically deformable legs 320 connected to the main body 310 thereof, and the free end 321 of each leg 320, i.e., the end not connected to the main body 310, is fixed with respect to the housing 100. The number of legs 320 may more specifically be 2-6.

Thus, in the canister purge valve 10 according to the present embodiment of the present invention, by providing at least two legs 320 connected to the main body 310 of the diaphragm assembly 300 and elastically deformable, and having the free ends 321 fixed with respect to the housing 100 of the canister purge valve 10, the diaphragm assembly 300 can be guided to move between the closed position closing the valve seat opening 210 and the open position opening the valve seat opening 210 by the elastic deformation of the legs 320, so that it is not necessary to provide a guide post on the valve seat as in the prior art. Specifically, when the diaphragm assembly 300 is in the closed position, the legs 320 are configured to be in an undeformed state; as the diaphragm assembly 300 moves from the closed position to the open position, the leg 320 is deformed, for example, elongated, and guides the movement of the diaphragm assembly 300 by the deformation; conversely, as the diaphragm assembly 300 moves from the open position back to the closed position, the legs 320 gradually return from the deformed state to their undeformed state, and guide the movement of the diaphragm assembly 300 during this time.

This aspect ensures smooth and uniform movement of the diaphragm assembly 300, since it can be ensured that the diaphragm assembly 300 does not undergo any tilting or horizontal displacement when moving up and down, thereby enabling its body 310 to tightly close the seat opening 210 in the closed position, achieving effective sealing of the seat opening 210 against any undesired fuel vapor leakage; on the other hand, this prevents the diaphragm assembly 300 from being subjected to frictional resistance or even to a sticking phenomenon caused thereby when moving between the open position and the closed position, thereby contributing to saving of driving energy and to smooth movement of the diaphragm assembly 300, thereby ensuring good operation and performance of the entire canister purge valve 10. Furthermore, the elimination of the guide post also allows for simplified construction of the valve seat 200, which therefore allows for simplified design, manufacture, and assembly of the valve seat 200, increasing cost effectiveness.

As shown in fig. 1-3, in some embodiments, each leg 320 is configured to extend from an edge of the body 310, and more particularly, from an outer perimeter of the body 310. This allows the leg 320 to be made integrally with the main body 310, for example the entire diaphragm assembly 300 may be made of rubber by over-moulding, which facilitates simplified manufacturing, saves assembly processes and facilitates a more robust diaphragm assembly 300, and which also facilitates elastic deformation of the leg 320. As also shown, in some embodiments, the legs 320 may be symmetrically arranged about the body 310. More specifically, the diaphragm assembly 300 may include two legs 320 disposed opposite each other. This allows for uniform guidance of the body 310 by the resiliently deformable legs 320, further facilitating ensuring the closing and sealing effect of the body 310 against the valve seat opening 210, and ensuring stable operation of the canister purge valve 10.

As shown in fig. 1-2, in some embodiments, the free end 321 of each leg 320 may be configured to snap into the housing 100. This allows the fixing of the free ends 321 of the legs 320 in the housing 100 to be achieved in a simple manner. In a more specific embodiment, as shown, the housing 100 may be a two-part housing, for example, comprising an upper housing and a lower housing, wherein the free end 321 of each leg 320 is configured to snap fit between the upper and lower housings. As shown, in a specific embodiment, the free end 331 of the leg 320 may be configured to form a T-shape with the main body 323 of the leg 320, and a slot may be provided at a corresponding portion of the housing 100 to securely capture the free end 321 of the leg 320 in the slot.

As shown in fig. 3, in some embodiments, each leg 320 may also be provided with a material cutout 322. This is advantageous in increasing the flexibility of the leg 320 to facilitate its elastic deformation, thereby achieving the guiding of the diaphragm assembly 300 in a smoother manner.

As shown in fig. 1-2, in some embodiments, the drive 400 for driving the diaphragm assembly 300 between the open and closed positions may be an electromagnetic drive and may include a drive member (not shown) and a driven member 410. More generally, the drive member may comprise a multi-turn coil disposed around the plastic armature, in which coil an electrical current may be passed; the driven component 410 may then be an armature that is movable relative to the driving component; wherein, when the coil is powered on, magnetic force is generated, the magnetic force will attract the armature to move close to the driving part, and when the coil is powered off, the magnetic force disappears. As shown, in some embodiments, a driving part, which is an electromagnetic driving part of the driving device 400, may be disposed in the housing 100, and a driven part 410 is disposed in the body 310 of the diaphragm assembly 300. In this way, the use of an electromagnetic drive and the placement of its driven component 410 in the body 310 of the diaphragm assembly 300 allows for good drive of the diaphragm assembly 300 with a very compact overall construction.

As shown in fig. 1-2, in some embodiments, the body 310 of the diaphragm assembly 300 includes a receptacle for receiving the driven member 410. This allows the available space of the body 310 to be fully utilized, facilitating compactness. More specifically, the body 310 of the diaphragm assembly 300 may be configured to include a lower piece 312 and an upper piece 313 connected together by an intermediate post portion 314, with a receiving portion for receiving the driven member 410 formed around the intermediate post portion 314 between the lower piece 312 and the upper piece 313. In this case, the driven part 410 includes a middle hole surrounding the middle pillar portion 314 of the body 310 of the diaphragm assembly 300, and the lower piece 312 may be relatively thin to allow the lower piece 312 to pass through the middle hole of the driven part 410 by elastic deformation, thereby placing the driven part 410 in the receiving portion between the lower piece 312 and the upper piece 313.

As shown in fig. 1-2, in some embodiments, the drive device 400 further includes a resilient return member 420, such as a coil spring, disposed between the driven component 410 and the drive component. Wherein, when the driving device 400 is not operated, the diaphragm assembly 300 is supported by the elastic restoring member 420 to close the valve seat opening 210; in operation of the drive device 400, the diaphragm assembly 300 is moved toward the drive member to open the valve seat opening 210. Thus, the resilient return member 420 allows the diaphragm assembly 300, and thus the main body 310 of the diaphragm assembly 300, to be supported as securely closing the valve seat opening 210 as desired, and also allows the diaphragm assembly 400 to be quickly returned to the closed position during switching of the drive device 400 from the operating state to the off state.

As shown in fig. 1-2, in some embodiments, the main body 310 of the diaphragm assembly 300 is provided with a protrusion 311, e.g., a plurality of protrusions 311, on a side facing the driving component of the driving device 400, which is more particularly integrally formed with the main body 310, e.g., integrally formed with the lower piece 312 of the main body 310. Such protrusions 311 may provide a vibration damping effect such that the diaphragm assembly 300 holding the driven member 410 does not hard stop against, for example, a skeleton of the driving device 400 when moving from the closed position to the open position, thereby ensuring more robust operation, and facilitating protection of associated components from high impact, facilitating extended service life, and allowing significant reduction in operational noise.

According to the utility model discloses an on the other hand, still provide a fuel evaporative emission system, it includes the carbon tank and as above carbon tank purge valve 10, the inlet end and the carbon tank intercommunication of carbon tank purge valve 10, the end of giving vent to anger of carbon tank purge valve and the air intake manifold intercommunication of engine. It will be appreciated that all of the above description of the canister purge valve is equally applicable to this evaporative emissions system.

The exemplary embodiment of the canister purge valve proposed by the present invention has been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and improvements can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations of the various technical features and structures proposed by the present invention can be made without departing from the scope of the present invention.

The scope of the present disclosure is not defined by the embodiments described above but is defined by the appended claims and equivalents thereof.

Claims (13)

1. A canister purge valve, characterized in that the canister purge valve (10) comprises:

a housing (100) defining a cavity and including an inlet end for admitting fuel vapor and an outlet end for allowing fuel vapor to exit;

the valve seat (200) is arranged at the air outlet end of the shell (100) and is provided with a valve seat opening (210);

a diaphragm assembly (300) movable between a closed position closing the seat opening (210) and an open position opening the seat opening (210);

a drive (400) capable of driving the diaphragm assembly (300) to move between the closed position and the open position;

wherein the diaphragm assembly (300) comprises a main body (310), the main body (310) being capable of closing the valve seat opening (210), and at least two elastically deformable legs (320) connected to the main body (310), a free end (321) of each leg (320) being fixed relative to the housing (100).

2. The canister purge valve according to claim 1, wherein the drive means (400) is an electromagnetic drive means comprising a drive part provided in the housing (100) and a driven part (410) provided in the body (310) of the diaphragm assembly (300).

3. Canister purge valve according to claim 2, characterized in that the driving means (400) further comprises a resilient return member (420) arranged between the driven part (410) and the driving part,

wherein:

the diaphragm assembly (300) is supported by the resilient return member (420) to close the valve seat opening (210) when the drive means (400) is not operating;

upon operation of the drive device (400), the diaphragm assembly (300) is moved towards the drive component to open the valve seat opening (210).

4. The canister purge valve according to any of claims 1-3, wherein said leg (320) extends from an edge of said body (310).

5. The canister purge valve according to claim 4, wherein said legs (320) are symmetrically arranged around said body (310).

6. The canister purge valve according to claim 5, wherein said diaphragm assembly (300) comprises two oppositely disposed legs (320).

7. The canister purge valve according to any of claims 1 to 3, wherein the free ends (321) of the legs (320) are snapped into the housing (100).

8. The canister purge valve according to any of claims 1-3, wherein each of said legs (320) is provided with a material cutout (322).

9. The canister purge valve according to claim 2 or 3, wherein said body (310) of said diaphragm assembly (300) comprises a receiving portion for receiving said driven member (410).

10. The canister purge valve according to claim 2 or 3, wherein the body (310) of the diaphragm assembly (300) is provided with a protrusion (311) at a side facing the driving part.

11. The canister purge valve according to any of claims 1 to 3, wherein the body (310) of the diaphragm assembly (300) is an elastically deformable body.

12. A fuel evaporative emissions system comprising a canister and a canister purge valve (10) as claimed in any of claims 1 to 11, the inlet end of the canister purge valve (10) communicating with the canister and the outlet end of the canister purge valve communicating with an inlet manifold of an engine.

13. A vehicle comprising the evaporative emission system of claim 12.

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