CN210738699U - Cavity for improving noise of carbon tank electromagnetic valve - Google Patents

Abstract

The utility model discloses a cavity for improving canister solenoid valve noise, its structure includes inlet end, cushion chamber and the end of giving vent to anger, and the both ends of cushion chamber are equipped with the opening of symmetry, and the one end of inlet end and the left opening of cushion chamber are linked together, and the other end of inlet end is used for being linked together with the car fuel tank, and the one end of the end of giving vent to anger is linked together with the opening on cushion chamber right side, and the other end of the end of giving vent to anger is used for being linked together with the car canister, and the inside of cushion chamber is equipped with the guiding mechanism of symmetry, and guiding mechanism is located two openings part one by one respectively, the utility model discloses the effectual noise.

Description

Cavity for improving noise of carbon tank electromagnetic valve

The technical field is as follows:

the utility model belongs to the technical field of the automobile parts technique and specifically relates to a cavity for improving carbon tank solenoid valve noise.

Background art:

the gasoline evaporative emissions control system is introduced to avoid fuel vapors escaping into the atmosphere and is part of the engine control system, where the canister and canister solenoid valve are two important components of the system. Wherein the canister is adapted to absorb oil vapour from the oil tank until the oil vapour is saturated. The canister solenoid valve is located at the rear end of the canister, is connected with the atmosphere port, is a normally open solenoid valve, and is opened/closed according to an electric signal sent by an Electronic Control Unit (ECU). According to the rules of OBD II program (for example after the vehicle stops running), ECU will send the electrical signal to the canister solenoid valve, the canister solenoid valve turns into the closed state, at this moment the whole evaporation emission control system forms a closed circuit, the system detects the change of system pressure value through the pressure sensor on the oil tank, therefore diagnose, detect whether the gas circuit has the leakage phenomenon, namely detect whether the mixed gas of oil and gas has the risk of discharging to the atmosphere without the canister filtration. The gasoline evaporative emission control system not only reduces emission, but also reduces oil consumption, and meanwhile, the carbon tank electromagnetic valve is suitable for various vehicles.

However, the opening and closing of the canister solenoid valve can generate noise, most technical means achieve the purpose of reducing the noise by changing the canister solenoid valve at present, the method is complex in structure, cost of enterprises is increased, and on the other hand, in addition to the noise from the canister solenoid valve, noise resonance can be generated on an evaporated oil path in the process that gasoline steam flows to the canister, so that the noise of a cab is increased.

The utility model has the following contents:

the utility model aims at providing a cavity for improving carbon tank solenoid valve noise solves one or more among the above-mentioned prior art problem.

In order to solve the technical problem, the utility model discloses an innovation point lies in: the automobile fuel tank air-out structure comprises an air inlet end, a buffer cavity and an air outlet end, wherein symmetrical openings are formed in two ends of the buffer cavity, one end of the air inlet end is communicated with the opening in the left side of the buffer cavity, the other end of the air inlet end is communicated with an automobile fuel tank, one end of the air outlet end is communicated with the opening in the right side of the buffer cavity, the other end of the air outlet end is communicated with an automobile carbon tank, symmetrical flow guide mechanisms are arranged inside the buffer cavity, and the flow guide mechanisms are respectively located at the two openings one by one.

Furthermore, the buffer cavity is a cylindrical cavity, the opening is symmetrically formed in the round surfaces at the left end and the right end of the buffer cavity, the air inlet end is connected to the left side of the buffer cavity, and the air outlet end is connected to the right side of the buffer cavity.

Further, the diameter of the round surface of the buffer cavity is 50mm, and the height of the buffer cavity is 70 mm.

Furthermore, a plurality of conical surfaces which are distributed in a step shape are formed on the air inlet end and the air outlet end.

Furthermore, the flow guide mechanism comprises two guide surfaces and extension bulges, wherein the guide surfaces and the extension bulges are symmetrically arranged on two sides of the opening, the guide surfaces are in a right-angled triangle shape, the inclined edges of the guide surfaces are oppositely arranged, and the extension bulges are positioned between the two guide surfaces and are connected with the opening.

The beneficial effects of the utility model reside in that:

1. the utility model provides a cavity for improving carbon tank solenoid valve noise, design through the cushion chamber makes the petrol steam velocity of flow reduce, and make partial petrol steam stop temporarily in the inside of cushion chamber, thereby make the velocity of flow of petrol steam flow direction car carbon tank reduce, the car carbon tank has been avoided adsorbing excessive saturated petrol, and excessive saturated petrol can send great noise through the carbon tank solenoid valve, thereby the operating frequency of follow-up carbon tank solenoid valve has been improved, thereby the operating noise of carbon tank solenoid valve has been reduced, this kind of simple structure of making an uproar is practical, very big reduction the manufacturing cost of enterprise.

2. The utility model provides a cavity for improving carbon tank solenoid valve noise has made things convenient for the inside petrol flow direction carbon tank that volatilizees of cushion chamber through the one side of water conservancy diversion mechanism, and on the other hand has also avoided petrol steam to arouse noise resonance on the evaporation line, leads to the noise to increase after conducting the driver's cabin.

Description of the drawings:

fig. 1 is a front view of the present invention.

Fig. 2 is a side sectional view of the present invention.

The specific implementation mode is as follows:

in order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

As fig. 1 to fig. 2 do the utility model discloses a concrete implementation mode, its structure includes inlet end 1, cushion chamber 2 and the end 3 of giving vent to anger, the both ends of cushion chamber 2 are equipped with the opening 4 of symmetry, the one end of inlet end 1 and the left opening 4 of cushion chamber 2 are linked together, the other end of inlet end 1 is used for being linked together with the automobile fuel tank, the one end of the end 3 of giving vent to anger is linked together with the opening 4 on cushion chamber 2 right side, the other end of the end 3 of giving vent to anger is used for being linked together with the car carbon tank, the inside of cushion chamber 2 is equipped with the guiding mechanism 5 of symmetry, guiding mechanism 5 is located two opening 4 departments.

In the utility model, in the process of the gasoline vapor flowing from the automobile fuel tank (not marked in the figure) to the automobile carbon canister (not marked in the figure), the gasoline vapor is communicated with the automobile fuel tank through the air inlet end 1 at the left side of the buffer cavity 2 and communicated with the automobile carbon canister through the air outlet end 2 at the right side of the buffer cavity 2, the gasoline vapor can pass through the buffer cavity 2, the flow rate of the gasoline vapor is reduced under the buffer of the buffer cavity 2, and part of the gasoline vapor temporarily stays in the buffer cavity 2, so that the flow rate of the gasoline vapor flowing to the automobile carbon canister is reduced, the phenomenon that the automobile carbon canister adsorbs the excessively saturated gasoline is avoided, the excessively saturated gasoline sends larger noise through the carbon canister electromagnetic valve, the working frequency of the subsequent carbon canister electromagnetic valve is improved, the working noise of the carbon canister electromagnetic valve is reduced, when the gasoline vapor flows to the inside of the buffer cavity 2, the flow guide mechanism 5 can effectively guide the flow direction of gasoline vapor, so that the gasoline vapor is uniformly distributed in the buffer cavity 2, on one hand, the flow guide mechanism facilitates the flow of volatile gasoline in the buffer cavity 2 to flow to the carbon canister, and on the other hand, the phenomenon that the gasoline vapor causes noise resonance on an evaporation pipeline (not marked in the figure, and is a pipeline communicated between an automobile fuel tank and an automobile carbon canister) and leads to noise increase after being transmitted to a cab is avoided.

The utility model discloses in, for further explanation cushion chamber 2's concrete structure, above-mentioned cushion chamber 2 is cylindrical cavity, the disc at both ends is seted up about cushion chamber 2 to opening 4 symmetry, the left side at cushion chamber 2 is connected to inlet end 1, the right side at cushion chamber 2 is connected to the end 3 of giving vent to anger, it is preferential, the diameter of 2 discs in above-mentioned cushion chamber is 50mm, the height of above-mentioned cushion chamber 2 is 70mm, the design of 2 cylindrical cavities in cushion chamber can make petrol steam temporarily stop in the inside of cushion chamber 2, thereby the velocity of flow of follow-up petrol steam flow direction car carbon tank has been reduced, and the design of 2 sizes in cushion chamber is convenient for the arrangement of cushion chamber 2 on the evaporation pipeline.

The utility model discloses in, in order to improve inlet end 1, give vent to anger the stability of holding 3 and external evaporation tube coupling, above-mentioned inlet end 1 all is formed with a plurality of conical surface 6 that are the echelonment and distribute gas on holding 3, has improved inlet end 1, has given vent to anger the stability of holding 3 and external evaporation tube coupling through conical surface 6.

The utility model discloses in, can guide petrol steam in order to realize water conservancy diversion mechanism 5, above-mentioned water conservancy diversion mechanism 5 includes that two symmetries set up the guide face 51 and the extension of opening 4 both sides are protruding 52, guide face 51 is right triangle, the slope of guide face 51 sets up relatively, it is located between two guide faces 51 and is connected with opening 4 to extend protruding 52, guide petrol steam through the inclined plane on guide face 51 makes petrol steam can be faster be full of whole cushion chamber 2, and the design of extending protruding 52 plays and has reduced opening 4's bore, the reduction of this kind of bore is favorable to volatilizing petrol inflow and outflow inside cushion chamber 2, the petrol of having avoided volatilizing has stopped in cushion chamber 2's inside.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a cavity for improving carbon tank solenoid valve noise which characterized in that: its structure includes inlet end (1), cushion chamber (2) and gives vent to anger end (3), the both ends of cushion chamber (2) are equipped with opening (4) of symmetry, the one end of inlet end (1) with left opening (4) of cushion chamber (2) are linked together, the other end of inlet end (1) is used for being linked together with the automobile fuel tank, give vent to anger the one end of end (3) with opening (4) on cushion chamber (2) right side are linked together, the other end of giving vent to anger end (3) is used for being linked together with the automobile carbon tank, the inside of cushion chamber (2) is equipped with water conservancy diversion mechanism (5) of symmetry, water conservancy diversion mechanism (5) are located two one by one respectively opening (4) department.

2. The chamber for improving the noise of a canister solenoid valve as defined in claim 1, wherein: cushion chamber (2) are cylindrical cavity, opening (4) symmetry is seted up the disc at both ends about cushion chamber (2), inlet end (1) is connected the left side of cushion chamber (2), it connects to give vent to anger end (3) the right side of cushion chamber (2).

3. The chamber for improving the noise of the solenoid valve of the carbon canister according to claim 2, wherein: the diameter of the round surface of the buffer cavity (2) is 50mm, and the height of the buffer cavity (2) is 70 mm.

4. The chamber for improving the noise of a canister solenoid valve as defined in claim 1, wherein: the air inlet end (1) and the air outlet end (3) are both provided with a plurality of conical surfaces (6) which are distributed in a step shape.

5. The chamber for improving the noise of a canister solenoid valve as defined in claim 1, wherein: the flow guide mechanism (5) comprises two guide surfaces (51) and an extension bulge (52), wherein the guide surfaces (51) are symmetrically arranged on two sides of the opening (4), the guide surfaces (51) are in a right-angled triangle shape, inclined sides of the guide surfaces (51) are oppositely arranged, and the extension bulge (52) is positioned between the two guide surfaces (51) and connected with the opening (4).

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