Carbon tank structure and carbon tank assembly for recovering steam in carburetor

Abstract

The utility model discloses a carbon tank structure and a carbon tank assembly for recovering steam in a carburetor, the carbon tank structure comprises a tank body, and the tank body is provided with an adsorption channel, a desorption channel and an air inlet channel. Fuel oil steam which is not fully combusted and enters the carburetor or residual fuel oil steam in the carburetor flows back into the tank body cavity through the recovery channel, the part of fuel oil steam is prevented from naturally volatilizing into the atmosphere, pollution to air is reduced, and the fuel oil steam recovery device is more environmentally friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon canister devices, in particular to a carbon canister structure and a carbon canister assembly for recovering vapor in a carburetor. Background Art

[0002] The carbon canister is usually installed between the gasoline tank and the engine. At normal temperature, the fuel tank is often filled with vapor. The function of the fuel evaporative emission control device is to introduce the vapor into the engine intake manifold for combustion and prevent it from volatilizing into the atmosphere. The carbon canister plays an important role in this process.

[0003] A conventional carbon canister generally includes three pipe openings, namely the adsorption pipe opening (also known as the adsorption channel), the desorption pipe opening (also known as the desorption channel), and the intake pipe opening (also known as the intake channel). The adsorption pipe opening is connected to the fuel tank, the desorption pipe opening is connected to the carburetor, and the carburetor is connected to the engine. When in use, the fuel vapor evaporated from the fuel tank enters the tank chamber from the adsorption pipe opening. After the engine is started, the fuel vapor in the chamber is drawn from the desorption pipe opening to the carburetor using the negative pressure principle, and then enters the engine for combustion through the carburetor. However, the vapor that is not fully burned in the engine will enter the carburetor, and the residual fuel vapor in the carburetor will evaporate into the outside, thereby polluting the air, which needs to be improved. Utility Model Content

[0004] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0005] The first aspect of the present application document discloses a carbon canister structure for recovering vapor in a carburetor, including a canister body, on which an adsorption channel, a desorption channel, and an intake channel are arranged, and the adsorption channel, the desorption channel, and the intake channel are all connected to a chamber in the canister body. A recovery channel is arranged on the canister body, and the recovery channel connects the chamber in the canister body with the outside world.

[0006] In this solution, the carbon canister structure is improved and a recovery channel is added. When in use, the recovery channel is connected to the carburetor. Fuel vapor that enters the carburetor due to incomplete combustion or remains in the carburetor flows back into the tank cavity through the recovery channel, preventing the natural evaporation of this part of the fuel vapor into the atmosphere, reducing air pollution, and being more environmentally friendly.

[0007] Furthermore, a buffer chamber is provided between the recovery channel and the chamber in the tank body, and the buffer chamber is respectively connected with the chamber in the tank body and the recovery channel. Adding the buffer chamber helps to improve the stability of the reflux.

[0008] Furthermore, the connecting port 1 between the chamber in the tank body and the buffer chamber, and the connecting port 2 between the recovery channel and the buffer chamber are staggered, thereby improving the stability of the reflux.

[0009] Furthermore, a groove is formed at the end surface of the tank body and is connected to the chamber inside the tank body. The notch of the groove is sealed with an end cover to form a buffer chamber. A recovery channel is provided on the end cover. The split structure facilitates the molding of the buffer chamber and reduces the molding difficulty.

[0010] Furthermore, it also includes a drainage channel connected to the inner chamber of the tank body. The drainage channel and the air intake channel are located at the same end face of the tank body, and the adsorption channel, desorption channel and recovery channel are arranged at the opposite end faces of the tank body. The reasonable layout is convenient for docking with external mechanisms.

[0011] The second aspect of the present application document discloses a carbon canister assembly, including the above-mentioned carbon canister structure and a carburetor, wherein the desorption channel is connected to the carburetor, and the recovery channel is connected to a corresponding chamber or channel of the carburetor.

[0012] The fuel vapor in the carburetor enters the chamber of the tank body from the recovery channel, preventing it from leaking into the air and reducing pollution. When in use, the recovery channel is connected to the gas outlet of the carburetor.

[0013] Furthermore, the recovery channel is communicated with the liquid accumulation chamber or the gas outlet end of the carburetor.

[0014] Furthermore, a valve for controlling on-off is arranged in the recovery channel or at the connection between the recovery channel and the carburetor, and the on-off of the carburetor and the chamber in the tank body is controlled by the valve.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model improves the structure of the tank body and the connection structure between the tank body and the carburetor. The fuel vapor in the carburetor can flow back into the chamber of the tank body to avoid leakage into the external environment, thereby reducing air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of the structure of the carbon canister in Example 1;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the carbon canister;

[0020] Figure 3 It is a structural schematic diagram of the carbon canister assembly;

[0021] Wherein, the accompanying drawings are marked as follows:

[0022] 1. Tank body; 2. Air intake channel; 3. Desorption channel; 4. Adsorption channel; 5. Recovery channel; 6. Drainage channel; 7. Carburetor; 10. Chamber; 11. End cover; 12. Buffer chamber; 13. Connecting port 1; 14. Connecting port 2. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 , Figure 2 As shown, in this example, the carbon canister structure for recovering vapor in the carburetor includes a canister body 1. The canister body 1 adopts a common cylindrical configuration. A chamber 10 is formed in the canister body 1. The chamber is used to load an adsorbent. An adsorption channel 4, a desorption channel 3, and an intake channel 2 are arranged on the canister body 1. The adsorption channel 4, the desorption channel 3, and the intake channel 2 are all connected to the chamber 10 in the canister body 1.

[0026] When in use, if the adsorption channel is connected to the oil outlet channel of the fuel tank, the desorption channel is connected to the inlet of the carburetor, and the carburetor is connected to the intake manifold of the engine, the fuel vapor evaporated from the fuel tank enters the tank cavity from the adsorption channel. After the engine is started, the fuel vapor in the cavity is drawn from the desorption channel to the carburetor using the negative pressure principle, and then enters the engine for combustion through the carburetor.

[0027] In this example, a recovery channel 5 is arranged on the tank body 1, and the recovery channel 5 connects the chamber 10 in the tank body 1 with the outside. When in use, if the recovery channel is connected to the corresponding channel (such as the air outlet) or chamber (such as the liquid accumulation chamber) of the carburetor, the fuel vapor that enters the carburetor due to incomplete combustion or remains in the carburetor will flow back to the tank body chamber through the recovery channel to avoid volatilization into the atmosphere, thereby reducing pollution.

[0028] For the layout of each channel in the tank, Figure 1 In the state shown, the air inlet channel 2 is located at the rear end face of the tank body 1, and the adsorption channel 4, the desorption channel 3 and the recovery channel 5 are arranged at intervals at the opposite end face of the tank body 1 (i.e., the head end face), and the adsorption channel 4 is located between the recovery channel 5 and the desorption channel 3. A drainage channel 6 can also be added, and the drainage channel 6 is connected to the inner chamber 10 of the tank body 1, and the drainage channel 6 and the air inlet channel 2 are located at the same end face.

[0029] In order to improve the stability of the reflux, a buffer chamber 12 is added in this example. The buffer chamber 12 is placed between the recovery channel 5 and the chamber 10 in the tank body 1. The buffer chamber 12 is connected to the chamber 10 in the tank body and the recovery channel 5 respectively. The buffer chamber can be placed inside or outside the chamber (such as at the end face of the tank body) according to the needs. Figure 2 In the structure shown, a groove is formed at the end surface of the tank body 1 and the groove is connected to the chamber in the tank body. The notch of the groove is sealed with an end cover 11, and the space enclosed by the groove and the end cover is the buffer chamber 12. The tube formed on the end cover 11 is the recovery channel 5. Preferably, the chamber in the tank body 1 and the communication port 13 of the buffer chamber 12, and the communication port 2 14 of the recovery channel 5 and the buffer chamber 12 are staggered, that is, they are arranged in a non-axially opposite arrangement.

[0030] Example 2

[0031] like Figure 3 As shown, the carbon canister assembly disclosed in this example includes the carbon canister structure and carburetor 7 described in Example 1, the desorption channel 3 is connected to the inlet of the carburetor 7, and the recovery channel 5 is connected to the gas outlet of the carburetor.

[0032] According to the demand, a valve for controlling the on-off can be installed in the recovery channel or at the connection between the recovery channel and the carburetor, such as a solenoid valve, to control the on-off of the carburetor and the chamber in the tank body through the valve.

[0033] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A carbon canister structure for recovering vapor in a carburetor, comprising a canister body (1), wherein the canister body (1) is provided with an adsorption channel (4), a desorption channel (3), and an intake channel (2), wherein the adsorption channel (4), the desorption channel (3), and the intake channel (2) are all connected to a chamber (10) in the canister body (1), and characterized in that: The tank body (1) is provided with a recovery channel (5), and the recovery channel (5) connects the chamber (10) in the tank body (1) with the outside.

2. The carbon canister structure for recovering vapor in a carburetor as claimed in claim 1, characterized in that: A buffer chamber (12) is provided between the recovery channel (5) and the chamber (10) in the tank body (1), and the buffer chamber (12) is respectively connected to the chamber (10) in the tank body (1) and the recovery channel (5).

3. The carbon canister structure for recovering vapor in a carburetor as claimed in claim 2, characterized in that: The chamber (10) in the tank body (1) and the first connecting port (13) of the buffer chamber (12), and the recovery channel (5) and the second connecting port (14) of the buffer chamber (12) are arranged in a staggered manner.

4. The carbon canister structure for recovering vapor in a carburetor as claimed in claim 2, characterized in that: A groove is formed at the end surface of the tank body (1) and is communicated with a chamber (10) in the tank body. The notch of the groove is sealed with an end cover (11) to form a buffer chamber (12). A recovery channel (5) is provided on the end cover (11).

5. The carbon canister structure for recovering vapor in a carburetor as claimed in claim 1, characterized in that: It also includes a drainage channel (6) connected to the inner chamber (10) of the tank body, wherein the drainage channel (6) and the air intake channel (2) are located at the same end surface of the tank body (1), and an adsorption channel (4), a desorption channel (3) and a recovery channel (5) are arranged at the opposite end surface of the tank body (1).

6. A carbon canister assembly, comprising the carbon canister structure according to any one of claims 1 to 5 and a carburetor (7), wherein the desorption channel (3) is connected to the carburetor (7), and is characterized in that: The recovery channel (5) is communicated with a corresponding chamber or channel of the carburetor (7).

7. The carbon canister assembly according to claim 6, characterized in that: The recovery channel (5) is communicated with the liquid accumulation chamber or the gas outlet end of the carburetor (7).

8. The carbon canister assembly according to claim 6, characterized in that: A valve for controlling on and off is arranged in the recovery channel (5) or at the connection between the recovery channel and the carburetor (7).

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