Integrated carbon can solenoid valve

Abstract

The utility model provides a kind of integrated carbon tank solenoid valve, relate to carbon tank solenoid valve technical field, to solve the technical problems of multiple carbon tank solenoid valve and double check valve connection node, high risk of leakage, low assembly efficiency, high cost, large space in prior art;An integrated carbon tank solenoid valve, including carbon tank solenoid valve module and double check valve module, by setting connecting portion and chamber, carbon tank solenoid valve module and double check valve module are directly integrated on physical structure, and first gas flow passage, second gas flow passage are communicated using chamber with gas outlet passage, eliminate the connecting pipeline and pipe joint between carbon tank solenoid valve and double check valve, fundamentally reduce the potential leakage point of system, greatly improve the sealing reliability of entire fuel evaporation emission control system, while also save additional connecting pipeline and mounting bracket, not only simplify assembly process, reduce material and assembly cost, also significantly save the precious arrangement space in engine compartment.

Description

Technical Field

[0001] This utility model relates to the field of carbon canister solenoid valve technology, specifically to an integrated carbon canister solenoid valve. Background Technology

[0002] In automotive evaporative emission control (EVAP) systems, the carbon canister solenoid valve and the dual one-way valve are two key functional components. The carbon canister solenoid valve is typically installed between the carbon canister and the engine intake manifold, opening or closing according to instructions from the engine control unit (ECU) to control the desorption of fuel vapors adsorbed in the carbon canister and their entry into the engine for combustion. The dual one-way valve is typically installed between the fuel tank and the carbon canister to balance the pressure inside and outside the fuel tank and prevent fuel leakage under certain conditions (such as rollover).

[0003] In traditional technical solutions, the carbon canister solenoid valve and the dual one-way valve are typically designed, manufactured, and installed as two separate components. During vehicle layout, they need to be connected via external metal or plastic piping and corresponding fittings to form a complete pneumatic circuit unit. The main disadvantages of this approach are: numerous connection points, increasing the potential for leaks; and the need for additional piping and mounting brackets, which not only increases assembly time and cost but also occupies already limited space in the engine compartment. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an integrated carbon canister solenoid valve, which solves the technical problems of existing carbon canister solenoid valves and double check valves, such as multiple connection nodes, high leakage risk, low assembly efficiency, high cost, and large space occupation.

[0005] To solve the above-mentioned technical problems, this utility model provides an integrated carbon canister solenoid valve, comprising: The carbon canister solenoid valve module includes a housing assembly and an electromagnetic drive unit located within the housing assembly. The housing assembly is provided with an air inlet channel and an air outlet channel. The electromagnetic drive unit is used to control the opening and closing of the air inlet channel and the air outlet channel. The dual one-way valve module includes a dual one-way housing, a first one-way valve assembly, and a second one-way valve assembly. The dual one-way housing includes a connecting part and a mounting part located below the connecting part. The connecting part has a chamber, which is connected to the bottom end of the housing assembly and communicates with the air outlet channel. The mounting part has a first airflow channel and a second airflow channel. The first one-way valve assembly and the second one-way valve assembly are respectively located in the first airflow channel and the second airflow channel and are respectively used to control the opening and closing of the first airflow channel and the second airflow channel. Both the first airflow channel and the second airflow channel are communicated with the chamber.

[0006] With the above structure, the integrated carbon canister solenoid valve of this utility model has the following advantages: by setting the connecting part and the chamber, the carbon canister solenoid valve module and the double one-way valve module are directly integrated in physical structure, and the chamber is used to connect the exhaust channel with the first airflow channel and the second airflow channel, eliminating the connecting pipes and pipe joints between the carbon canister solenoid valve and the double one-way valve, fundamentally reducing the potential leakage points of the system, greatly improving the sealing reliability of the entire fuel evaporation emission control system, and also eliminating the need for additional connecting pipes and mounting brackets, which not only simplifies the assembly process and reduces material and assembly costs, but also significantly saves valuable layout space in the engine compartment.

[0007] As an improvement, a partition is installed inside the chamber, which radially divides the chamber into an air inlet chamber in the middle and a first air outlet chamber and a second air outlet chamber on the left and right sides of the air inlet chamber. The upper end of the air inlet chamber is connected to the air outlet channel. The upper left and right side walls of the partition are respectively provided with a first flow channel and a second flow channel. The air inlet chamber is connected to the first air outlet chamber and the second air outlet chamber through the first flow channel and the second flow channel, respectively. The double one-way housing is provided with a main flow channel located below the partition. The bottom ends of the first air outlet chamber and the second air outlet chamber are both connected to the main flow channel. The main flow channel is connected to the first airflow channel and the second airflow channel. With this structure, the integrated design of the carbon canister solenoid valve and the double one-way valve eliminates the natural attenuation effect of traditional pipelines on airflow noise, which leads to an increase in airflow noise. By setting up an air inlet chamber, a first air outlet chamber and a second air outlet chamber, the airflow is divided into two paths after entering the air inlet chamber and enters the first air outlet chamber and the second air outlet chamber respectively, which slows down the airflow velocity and makes the chamber act as a resonant cavity, thereby reducing the noise generated by the airflow.

[0008] As an improvement, the chamber extends through the upper end of the connecting part and forms an opening at the upper end of the connecting part. The bottom end of the housing assembly is connected to the opening, and the bottom end of the housing assembly has a protrusion. The air outlet channel extends to the protrusion and passes through the bottom end of the protrusion. The bottom end of the protrusion is located in the air inlet chamber. With this structure, the protrusion of the housing assembly extends directly into the air inlet chamber, realizing a direct and precise connection between the air outlet channel and the chamber. This shortens the internal flow channel and reduces internal flow resistance and possible eddies. At the same time, the fit between the protrusion and the chamber is conducive to assembly positioning, ensuring the accuracy of air path connection and further enhancing the reliability and performance consistency of the integrated structure.

[0009] As an improvement, the housing assembly includes an upper housing and a lower housing, with the lower housing connected to the bottom of the upper housing. An air intake channel is located on the upper housing and extends through the upper end of the upper housing, while an air outlet channel is located on the lower housing and extends through the bottom of the lower housing.

[0010] As an improvement, a protrusion is provided at the bottom of the lower housing, and the air outlet extends to the protrusion and passes through the bottom of the protrusion.

[0011] As an improvement, the chamber extends through the upper end of the connecting part and forms an opening at the upper end of the connecting part, with the bottom end of the housing assembly connected inside the opening; with this structure, this plug-in connection method provides a clear and stable assembly reference, making the docking of the two main modules quick and accurate.

[0012] As an improvement, the housing assembly is welded to the connecting part; with this structure, the welded connection can form a high-strength sealing joint, preventing leakage at the connection.

[0013] As an improvement, the chamber includes an expanded section and a reduced section located below the expanded section, with a stepped surface formed between the expanded and reduced sections. The bottom end of the housing assembly abuts against the stepped surface. With this structure, a clear axial assembly limit is established by setting the stepped surface abuts against the bottom end of the housing assembly. This structural feature can prevent the housing assembly from being inserted too deeply during connection, ensuring that the internal airflow channel is in the optimal relative position designed. At the same time, the stepped surface provides a stable support surface for welding or other connection processes, which helps to ensure connection quality and makes the assembly stress distribution more uniform, improving the stability of the connection structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 Cross-sectional view of section AA.

[0016] Figure 3 This is a structural schematic diagram of the present invention from another perspective.

[0017] Figure 4 for Figure 3 Cross-sectional view of the middle BB section.

[0018] Reference numerals: 100, Carbon canister solenoid valve module; 200, Dual one-way valve module; 1, Housing assembly; 2, Electromagnetic drive unit; 3, Inlet channel; 4, Outlet channel; 5, Dual one-way housing; 51, Connecting part; 52, Mounting part; 6, First one-way valve assembly; 7, Second one-way valve assembly; 8, Chamber; 81, Inlet chamber; 82, First outlet chamber; 83, Second outlet chamber; 9, First airflow channel; 10, Second airflow channel; 11, Partition; 12, First flow passage; 13, Second flow passage; 14, Main flow channel; 15, Protrusion; 16, Upper housing; 17, Lower housing; 18, Expanded diameter part; 19, Reduced diameter part; 20, Stepped surface. Detailed Implementation

[0019] The following is a detailed description of an integrated carbon canister solenoid valve according to the present invention, with reference to the accompanying drawings.

[0020] like Figures 1 to 4As shown, an integrated carbon canister solenoid valve includes a carbon canister solenoid valve module 100 and a dual one-way valve module 200. The carbon canister solenoid valve module 100 includes a housing assembly 1 and an electromagnetic drive unit 2 disposed within the housing assembly 1. The housing assembly 1 is provided with an air inlet channel 3 and an air outlet channel 4. The electromagnetic drive unit 2 is used to control the opening and closing of the air inlet channel 3 and the air outlet channel 4. The specific structure of the electromagnetic drive unit 2 and the working principle of controlling the opening and closing of the air inlet channel 3 and the air outlet channel 4 are existing technologies and will not be described in detail here. The housing assembly 1 includes an upper housing 16 and a lower housing 17. The lower housing 17 is connected to the bottom end of the upper housing 16. The air inlet channel 3 is disposed on the upper housing 16 and passes through the upper end of the upper housing 16. The air outlet channel 4 is disposed on the lower housing 17 and passes through the bottom end of the lower housing 17.

[0021] like Figure 2 and Figure 4 As shown, the dual one-way valve module 200 includes a dual one-way housing 5, a first one-way valve assembly 6, and a second one-way valve assembly 7. The dual one-way housing 5 includes a connecting part 51 and a mounting part 52 located below the connecting part 51. The connecting part 51 and the mounting part 52 are integrally formed. A chamber 8 is provided inside the connecting part 51. The connecting part 51 is connected to the bottom end of the housing assembly 1, and the chamber 8 is connected to the air outlet channel 4. A first airflow channel 9 and a second airflow channel 10 are provided inside the mounting part 52. The first one-way valve assembly 6 and the second one-way valve assembly 7 are respectively located in the first airflow channel 9 and the second airflow channel 10 and are respectively used to control the opening and closing of the first airflow channel 9 and the second airflow channel 10. Both the first airflow channel 9 and the second airflow channel 10 are connected to the chamber 8. The specific structure of the first one-way valve assembly 6 and the second one-way valve assembly 7 and the working principle of controlling the opening and closing of the first airflow channel 9 and the second airflow channel 10 are existing technologies and will not be described in detail here.

[0022] This invention directly integrates the carbon canister solenoid valve module 100 and the dual one-way valve module 200 in terms of physical structure by setting the connecting part 51 and the chamber 8. Furthermore, the chamber 8 connects the exhaust channel 4 with the first airflow channel 9 and the second airflow channel 10, eliminating the connecting pipes and pipe joints between the carbon canister solenoid valve and the dual one-way valve. This fundamentally reduces potential leakage points in the system, greatly improves the sealing reliability of the entire fuel evaporation emission control system, and also eliminates the need for additional connecting pipes and mounting brackets. This not only simplifies the assembly process and reduces material and assembly costs, but also significantly saves valuable layout space in the engine compartment.

[0023] The integrated design of the carbon canister solenoid valve and the dual check valve eliminates the natural attenuation effect of traditional pipelines on airflow noise, leading to increased airflow noise. To address this issue caused by the integrated design, such as... Figure 4As shown, a partition 11 is provided inside the chamber 8, which radially divides the chamber 8 into an air inlet chamber 81 located in the middle and a first air outlet chamber 82 and a second air outlet chamber 83 located on the left and right sides of the air inlet chamber 81. The upper end of the air inlet chamber 81 is connected to the air outlet channel 4. The upper left and right side walls of the partition 11 are respectively provided with a first flow channel 12 and a second flow channel 13. The air inlet chamber 81 is connected to the first air outlet chamber 82 and the second air outlet chamber 83 through the first flow channel 12 and the second flow channel 13 respectively. The double single-pass shell 5 is provided with a main flow channel 14 located below the partition 11. The bottom ends of the first air outlet chamber 82 and the second air outlet chamber 83 are both connected to the main flow channel 14. The main flow channel 14 is connected to the first airflow channel 9 and the second airflow channel 10, so that the airflow splits into two paths after entering the air inlet chamber 81 and enters the first air outlet chamber 82 and the second air outlet chamber 83 respectively, which slows down the airflow velocity and makes the chamber 8 act as a resonant cavity, thereby reducing the noise generated by the airflow.

[0024] Specifically, such as Figure 4 As shown, chamber 8 extends through the upper end of connecting part 51 and forms an opening at the upper end of connecting part 51. The bottom end of housing assembly 1 is connected to the opening, and the bottom end of housing assembly 1 is provided with a protrusion 15, that is, the bottom end of lower housing 17 is connected to the opening, and the protrusion 15 is provided at the bottom end of lower housing 17; the air outlet channel 4 extends to the protrusion 15 and passes through the bottom end of the protrusion 15, and the bottom end of the protrusion 15 is located in the air inlet chamber 81. The opening of chamber 8 is closed by lower housing 17, and the first flow channel 12 and the second flow channel 13 are notches respectively provided on the left and right side walls of the upper end of partition 11.

[0025] The housing assembly 1 is welded to the connecting part 51. Specifically, the lower housing 17 is welded to the connecting part 51.

[0026] like Figure 2 As shown, the chamber 8 includes an enlarged diameter section 18 and a reduced diameter section 19 located below the enlarged diameter section 18. The air inlet chamber 81, the first air outlet chamber 82, and the second air outlet chamber 83 are located in the reduced diameter section 19. A stepped surface 20 is formed between the enlarged diameter section 18 and the reduced diameter section 19. The bottom end of the housing assembly 1 abuts against the stepped surface 20. Specifically, the lower outer wall of the lower housing 17 is attached to the inner wall of the enlarged diameter section 18, and the bottom end of the lower housing 17 abuts against the stepped surface 20.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An integrated carbon canister solenoid valve, characterized in that, include: The carbon canister solenoid valve module (100) includes a housing assembly (1) and an electromagnetic drive unit (2) disposed within the housing assembly (1). The housing assembly (1) is provided with an air inlet channel (3) and an air outlet channel (4). The electromagnetic drive unit (2) is used to control the opening and closing of the air inlet channel (3) and the air outlet channel (4). The dual one-way valve module (200) includes a dual one-way housing (5), a first one-way valve assembly (6), and a second one-way valve assembly (7). The dual one-way housing (5) includes a connecting part (51) and a mounting part (52) located below the connecting part (51). The connecting part (51) has a chamber (8) inside. The connecting part (51) is connected to the bottom end of the housing assembly (1), and the chamber (8) is connected to the air outlet channel (4). The mounting part (52) has a first airflow channel (9) and a second airflow channel (10). The first one-way valve assembly (6) and the second one-way valve assembly (7) are respectively located in the first airflow channel (9) and the second airflow channel (10) and are respectively used to control the opening and closing of the first airflow channel (9) and the second airflow channel (10). The first airflow channel (9) and the second airflow channel (10) are both connected to the chamber (8).

2. The integrated carbon canister solenoid valve according to claim 1, characterized in that, The chamber (8) is provided with a partition (11), which divides the chamber (8) radially into an air inlet chamber (81) in the middle and a first air outlet chamber (82) and a second air outlet chamber (83) on the left and right sides of the air inlet chamber (81). The upper end of the air inlet chamber (81) is connected to the air outlet channel (4). The upper left and right side walls of the partition (11) are provided with a first flow channel (12) and a second flow channel (13). The air inlet chamber (81) is connected to the first air outlet chamber (82) and the second air outlet chamber (83) through the first flow channel (12) and the second flow channel (13) respectively. The double single-pass shell (5) is provided with a main flow channel (14) located below the partition (11). The bottom ends of the first air outlet chamber (82) and the second air outlet chamber (83) are connected to the main flow channel (14). The main flow channel (14) is connected to the first airflow channel (9) and the second airflow channel (10).

3. The integrated carbon canister solenoid valve according to claim 2, characterized in that, The chamber (8) passes through the upper end of the connecting part (51) and forms an opening at the upper end of the connecting part (51). The bottom end of the housing assembly (1) is connected to the opening. The bottom end of the housing assembly (1) is provided with a protrusion (15). The air outlet channel (4) extends to the protrusion (15) and passes through the bottom end of the protrusion (15). The bottom end of the protrusion (15) is located in the air inlet chamber (81).

4. The integrated carbon canister solenoid valve according to claim 1, characterized in that, The housing assembly (1) includes an upper housing (16) and a lower housing (17). The lower housing (17) is connected to the bottom of the upper housing (16). The air intake channel (3) is located on the upper housing (16) and passes through the upper end of the upper housing (16). The air outlet channel (4) is located on the lower housing (17) and passes through the bottom of the lower housing (17).

5. The integrated carbon canister solenoid valve according to claim 4, characterized in that, The lower housing (17) has a protrusion (15) at its bottom end, and the air outlet channel (4) extends to the protrusion (15) and passes through the bottom end of the protrusion (15).

6. The integrated carbon canister solenoid valve according to claim 1, characterized in that, The chamber (8) extends through the upper end of the connecting part (51) and forms an opening at the upper end of the connecting part (51), and the bottom end of the housing assembly (1) is connected to the opening.

7. The integrated carbon canister solenoid valve according to claim 6, characterized in that, The housing assembly (1) is welded to the connecting part (51).

8. The integrated carbon canister solenoid valve according to claim 6, characterized in that, The chamber (8) includes an enlarged diameter section (18) and a reduced diameter section (19) located below the enlarged diameter section (18). A stepped surface (20) is formed between the enlarged diameter section (18) and the reduced diameter section (19). The bottom end of the housing assembly (1) abuts against the stepped surface (20).

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