Fuel evaporative emission control system and vehicle with same

Abstract

The utility model discloses a fuel evaporative emission control system and a vehicle with the same. The fuel evaporative emission control system comprises a carbon canister, a leakage detection device and an ash filter, the carbon canister comprises a carbon canister shell, a part of the carbon canister shell is constructed to be a support part, the leakage detection device is installed on the support part, and the ash filter is installed on the leakage detection device. According to the fuel evaporation emission control system, the leakage detection device is installed on the carbon canister shell, and the ash filter is installed on the leakage detection device, so that the overall structure of the carbon canister, the leakage detection device and the ash filter is compact, and the arrangement space can be effectively saved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a fuel evaporative emission control system and a vehicle having the fuel evaporative emission control system. Background Technology

[0002] As vehicles are driven, some components in the vehicle's evaporative emission control system are prone to aging and deformation, and pipe connections may also become loose. These factors can lead to poor sealing of the evaporative emission control system, causing harmful hydrocarbons to be emitted into the atmosphere. Currently, the China VI emission standard requires leak diagnosis (OBD) for the evaporative emission control system. For this purpose, the vehicle's charcoal canister needs to be connected to a leak detection device. To prevent the leak detection device from becoming clogged, it is necessary to add a high-precision air filter (ash filter) to the charcoal canister's vent.

[0003] In related technologies, the arrangement of the charcoal canister, ash filter, and leak detection device involves designing a bracket that matches the leak detection device, plus another bracket that simultaneously secures both the ash filter and the leak detection device. The brackets are fixed to the vehicle body, and the leak detection device is then connected to the charcoal canister via piping. This approach requires a large number of brackets, and the connecting piping between the leak detection device and the charcoal canister is quite long, resulting in a large layout space. Therefore, there is room for improvement. Utility Model Content

[0004] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a fuel evaporation emission control system with a compact structure, which is beneficial for saving layout space.

[0005] This application also proposes a vehicle having the aforementioned fuel evaporative emission control system.

[0006] The fuel evaporative emission control system according to an embodiment of this application includes: a charcoal canister, a leak detection device, and an ash filter. The charcoal canister includes a charcoal canister shell, a portion of which is configured as a support portion. The leak detection device is mounted on the support portion, and the ash filter is mounted on the leak detection device.

[0007] According to the fuel evaporative emission control system of this application embodiment, by installing the leak detection device on the charcoal canister shell and the ash filter on the leak detection device, the overall structure of the charcoal canister, the leak detection device and the ash filter is compact, which can effectively save layout space.

[0008] According to some embodiments of this application, the charcoal canister shell further includes a shell body portion, the support portion is connected to the shell body portion, the shell body portion has a charcoal canister vent to the atmosphere, and the leakage detection device has a first connector, the first connector being directly connected to the charcoal canister vent to the atmosphere.

[0009] According to some embodiments of this application, the first connector is inserted into the vent of the charcoal canister, and a first sealing ring is provided at the insertion point of the first connector and the vent of the charcoal canister.

[0010] According to some embodiments of this application, the leak detection device has a second connector, and the ash filter has an ash filter interface that snaps into the second connector.

[0011] According to some embodiments of this application, the ash filter interface is plugged into the second connector, and a second sealing ring is provided at the plugging point between the ash filter interface and the second connector.

[0012] According to some embodiments of this application, one of the ash filter interface and the second connector has a buckle, and the other has a slot, with the buckle engaging with the slot.

[0013] According to some embodiments of this application, one of the leakage detection device and the ash filter has a limiting protrusion and the other has a limiting groove, wherein the limiting protrusion is embedded in the limiting groove.

[0014] According to some embodiments of this application, the ash filter also has an ash filter vent to the atmosphere.

[0015] According to some embodiments of this application, the leak detection device includes a leak detection housing and a leak detection element disposed inside the leak detection housing, the ash filter includes an ash filter housing and a filter element disposed inside the ash filter housing, the leak detection housing is mounted on the support portion, and the ash filter housing is mounted on the leak detection housing.

[0016] A vehicle according to another embodiment of this application includes the above-described fuel evaporative emission control system.

[0017] According to the vehicle embodiment of this application, by installing the leak detection device on the charcoal canister shell and the ash filter on the leak detection device, the overall structure of the charcoal canister, the leak detection device and the ash filter is compact, which can effectively save layout space.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. Attached Figure Description

[0019] Figure 1 This is a connection diagram of the charcoal canister, leak detection device, and ash filter according to an embodiment of this application;

[0020] Figure 2 This is an exploded view of the carbon canister, leak detection device, and ash filter according to embodiments of this application;

[0021] Figure 3 This is a schematic diagram showing the connection between the charcoal canister's vent to the atmosphere and the first connector of the leak detection device.

[0022] Figure 4 This is a schematic diagram of the second connector of the leak detection device and the ash filter interface;

[0023] Figure 5 This is a three-dimensional schematic diagram of a leak detection device and a dust filter;

[0024] Figure 6 This is a schematic diagram of an ash filter;

[0025] Figure 7 This is a schematic cross-sectional view showing the connection of the charcoal canister, leak detection device, and ash filter according to an embodiment of this application.

[0026] Reference numerals:

[0027] Fuel evaporation emission control system 10, charcoal canister 1, charcoal canister shell 11, shell body 111, charcoal canister vent 1111, support 112, leak detection device 2, first connector 21, second connector 22, ash filter 3, ash filter interface 31, first sealing ring 4, second sealing ring 5, bolt 6, buckle 71, slot 72, limiting protrusion 81, limiting groove 82. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] The following combination Figures 1-7This application provides a detailed description of a fuel evaporative emission control system 10 and a vehicle having the fuel evaporative emission control system 10, according to embodiments of the present application.

[0031] Reference Figure 1-Figure 2 , Figure 4 As shown, the fuel evaporative emission control system 10 according to an embodiment of this application may include a charcoal canister 1, a leak detection device 2, and an ash filter 3.

[0032] The charcoal canister 1 contains activated carbon for adsorbing fuel oil vapor. The charcoal canister 1 includes a canister shell 11, a portion of which forms a support section 112. A leak detection device 2, also known as an OBD module, is mounted on the support section 112, and an ash filter 3 is mounted on top of the leak detection device 2. This eliminates the need for a separate support for the leak detection device 2 and the ash filter 3; the support for the leak detection device 2 is directly integrated into the charcoal canister shell 11, reducing the need for additional supports and resulting in a compact layout for the charcoal canister 1, leak detection device 2, and ash filter 3.

[0033] According to the embodiment of the present application, the fuel evaporation emission control system 10 integrates the charcoal canister 1, the leak detection device 2 and the ash filter 3 by installing the leak detection device 2 on the charcoal canister shell 11 and the ash filter 3 on the leak detection device 2. The overall structure is compact and can effectively save layout space, which is a highly integrated design.

[0034] In some embodiments of this application, reference is made to Figure 1-Figure 3 , Figure 7 As shown, the charcoal canister shell 11 also includes a shell body portion 111, and a support portion 112 connected to the shell body portion 111. The shell body portion 111 has a charcoal canister vent 1111, and the leakage detection device 2 has a first connector 21, which is directly connected to the charcoal canister vent 1111. No piping is needed between the first connector 21 and the charcoal canister vent 1111, thereby saving piping costs.

[0035] In some embodiments of this application, reference is made to Figure 3 , Figure 7 As shown, the first connector 21 is inserted into the vent 1111 of the charcoal canister, and a first sealing ring 4 is provided at the insertion point between the first connector 21 and the vent 1111. Optionally, the first connector 21 can extend into the vent 1111 of the charcoal canister, such as... Figure 3 , Figure 7 As shown; alternatively, the vent 1111 of the charcoal canister can extend into the first connector 21. By setting the first sealing ring 4, the airtightness of the joint between the first connector 21 and the vent 1111 of the charcoal canister can be improved, achieving a seal and preventing air leakage.

[0036] Optionally, the first sealing ring 4 is an O-ring. The first sealing ring 4 can be a rubber ring, silicone ring, etc. The number of first sealing rings 4 can be one or more.

[0037] In some embodiments of this application, reference is made to Figure 4 , Figure 7 As shown, the leak detection device 2 has a second connector 22, and the filter 3 has a filter interface 31, which is snapped into the second connector 22. Optionally, the filter interface 31 can extend into the second connector 22, such as... Figure 4 , Figure 7 As shown; alternatively, the second connector 22 can extend into the ash filter interface 31.

[0038] In some embodiments of this application, reference is made to Figure 4 , Figure 7 As shown, the ash filter interface 31 is inserted into the second connector 22, and a second sealing ring 5 is provided at the insertion point of the ash filter interface 31 and the second connector 22. By providing the second sealing ring 5, the airtightness of the insertion point of the ash filter interface 31 and the second connector 22 can be improved, achieving a seal and preventing air leakage.

[0039] Optionally, the second sealing ring 5 is an O-ring. The second sealing ring 5 can be a rubber ring, silicone ring, etc. The number of second sealing rings 5 ​​can be one or more.

[0040] In some embodiments of this application, reference is made to Figures 4-7 As shown, one of the ash filter interface 31 and the second connector 22 has a snap-fit ​​71, and the other has a slot 72. The snap-fit ​​71 and the slot 72 engage in a snap-fit ​​relationship. In this way, the ash filter interface 31 and the second connector 22 are easy to install and remove, facilitating the replacement of a new ash filter 3.

[0041] In some embodiments of this application, one of the leak detection device 2 and the ash filter 3 has a limiting protrusion 81, and the other has a limiting groove 82. The limiting protrusion 81 is embedded in the limiting groove 82, thereby determining the relative position of the leak detection device 2 and the ash filter 3, preventing them from rotating relative to each other. Optionally, referring to... Figures 5-6 As shown, the leakage detection device 2 has a limiting protrusion 81, and the ash filter 3 has a limiting groove 82, with the limiting protrusion 81 embedded in the limiting groove 82. Alternatively, the ash filter 3 has a limiting protrusion 81, and the leakage detection device 2 has a limiting groove 82, with the limiting protrusion 81 embedded in the limiting groove 82.

[0042] In some embodiments of this application, the ash filter 3 also has an ash filter vent to the atmosphere.

[0043] In some embodiments, such as during vehicle leak checks, the vehicle's ECU sends an energizing signal to the leak detection device 2 according to a pre-set program. The leak detection device 2 draws air from the filter 3, and the air enters the leak detection device 2 through the second connector 22. Specifically, outside air enters the interior of the filter 3 through the filter's vent, is filtered by the filter element inside the filter 3, reaches the filter inlet 31, and then enters the leak detection device 2 through the second connector 22 connected to the filter inlet 31. The filter element inside the filter 3 has a filtering function and can effectively prevent the leak detection device 2 from becoming clogged.

[0044] In some optional embodiments, the ECU can determine whether the fuel system is leaking by obtaining the on / off information of the internal feedback circuit of the leak detection device 2 within a reference time. For example, if the circuit is open, there is no leak, and if the circuit is closed, there is a leak.

[0045] In some alternative embodiments, other indicators can also be used to determine whether the fuel system is leaking. These are common diagnostic methods in the automotive field, and will not be listed here.

[0046] In non-leak diagnostic mode, the clean air filtered by the ash filter 3 can enter the carbon canister 1 through the leak detection device 2 to replenish the desorption air for the carbon canister 1.

[0047] In some embodiments of this application, the leakage detection device 2 includes a leakage detection housing and a leakage detection element, the leakage detection element being disposed inside the leakage detection housing; the ash filter 3 includes an ash filter housing and a filter element, the filter element being disposed inside the ash filter housing; the leakage detection housing is mounted on the support portion 112; and the ash filter housing is mounted on the leakage detection housing.

[0048] Reference Figure 1 As shown, the carbon canister shell 11 is also provided with a vehicle body connection hole. The bolt 6 passes through the vehicle body connection hole and is fastened to the vehicle body, thereby fixing the carbon canister 1 to the vehicle body. Since the leakage detection device 2 is installed on the carbon canister 1 and the ash filter 3 is installed on the leakage detection device 2, the leakage detection device 2 and the ash filter 3 are indirectly fixed to the vehicle body.

[0049] Optionally, there can be multiple body connection holes, with each bolt 6 corresponding to one of the body connection holes, which helps to improve the firmness of the carbon canister 1 being fixed to the vehicle body. For example, the number of body connection holes can be two, three, four, etc.

[0050] According to the fuel evaporation emission control system 10 of this application embodiment, the leak detection device 2 is installed on the charcoal canister shell 11, and the ash filter 3 is directly snapped onto the leak detection device 2. The charcoal canister 1, the leak detection device 2 and the ash filter 3 are integrated together without any connecting pipelines in between. The overall structure is compact, saving layout space and achieving the function at the lowest cost.

[0051] A vehicle according to another embodiment of this application includes the fuel evaporative emission control system 10 of the above embodiment.

[0052] According to the vehicle of the present application embodiment, by installing the leak detection device 2 on the charcoal canister shell 11 and the ash filter 3 on the leak detection device 2, the overall structure of the charcoal canister 1, the leak detection device 2 and the ash filter 3 is compact, which can effectively save layout space.

[0053] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0056] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fuel evaporation emission control system, characterized in that, include: A charcoal canister (1), the charcoal canister (1) including a charcoal canister shell (11), a portion of the charcoal canister shell (11) being configured as a support portion (112); Leakage detection device (2), the leakage detection device (2) is installed on the bracket (112); Ash filter (3), which is installed on the leak detection device (2).

2. The fuel evaporation emission control system according to claim 1, characterized in that, The charcoal canister shell (11) further includes a shell body part (111), the support part (112) is connected to the shell body part (111), the shell body part (111) has a charcoal canister vent (1111), and the leakage detection device (2) has a first connector (21), which is directly connected to the charcoal canister vent (1111).

3. The fuel evaporation emission control system according to claim 2, characterized in that, The first connector (21) is inserted into the vent (1111) of the charcoal canister, and a first sealing ring (4) is provided at the insertion point of the first connector (21) and the vent (1111) of the charcoal canister.

4. The fuel evaporation emission control system according to claim 1, characterized in that, The leakage detection device (2) has a second connector (22), and the ash filter (3) has an ash filter interface (31), which is snapped into the second connector (22).

5. The fuel evaporation emission control system according to claim 4, characterized in that, The ash filter interface (31) is inserted into the second connector (22), and a second sealing ring (5) is provided at the insertion point of the ash filter interface (31) and the second connector (22).

6. The fuel evaporation emission control system according to claim 5, characterized in that, One of the ash filter inlet (31) and the second connector (22) has a buckle (71) and the other has a slot (72), and the buckle (71) and the slot (72) engage with each other.

7. The fuel evaporation emission control system according to claim 4, characterized in that, One of the leakage detection device (2) and the ash filter (3) has a limiting protrusion (81) and the other has a limiting groove (82), with the limiting protrusion (81) embedded in the limiting groove (82).

8. The fuel evaporation emission control system according to claim 4, characterized in that, The ash filter (3) also has an ash filter vent.

9. The fuel evaporative emission control system according to any one of claims 1-8, characterized in that, The leakage detection device (2) includes a leakage detection housing and a leakage detection element disposed inside the leakage detection housing. The ash filter (3) includes an ash filter housing and a filter element disposed inside the ash filter housing. The leakage detection housing is installed on the support part (112), and the ash filter housing is installed on the leakage detection housing.

10. A vehicle, characterized in that, The fuel evaporative emission control system includes any one of claims 1-9.

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