Noise reduction type carbon tank desorption pipeline

Abstract

The utility model discloses a noise reduction type carbon tank desorption pipeline which comprises a pipeline body and a buffer tank arranged on the pipeline body, a baffle is arranged in the buffer tank and divides the buffer tank into a front cavity and a rear cavity, the buffer tank is further provided with an inlet channel and an outlet channel, the inlet channel is communicated with the rear cavity, and the outlet channel is communicated with the front cavity. The outlet channel is communicated with the front cavity; according to the silencing type carbon tank desorption pipeline disclosed by the utility model, the buffer tank with a silencing function is arranged on the pipeline body, and the multi-cavity structure in the buffer tank is matched with the inlet channel and the outlet channel to guide airflow flowing, so that standing waves are formed in the buffer tank after airflow enters the buffer tank; the principle of air resonance is utilized to consume sound wave energy generated by airflow flowing, so that sound waves are absorbed and dissipated, and the purpose of eliminating abnormal sound is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of silencer devices and relates to a silencer type carbon canister desorption pipeline. Background Art

[0002] Carbon canister purge refers to the process of releasing fuel vapor stored in the carbon canister into the engine's intake system within a vehicle's evaporative emissions control system. This process typically occurs while the engine is running, using the negative pressure in the intake manifold to draw fuel vapor from the canister into the engine for combustion, thereby reducing fuel vapor emissions and improving fuel utilization.

[0003] With the continuous improvement of environmental protection standards, the desorption flow of National VIb models is significantly increased when desorbing the carbon canister compared to National V models. When the carbon canister solenoid valve is opened for desorption, the desorption airflow is enhanced, and the airflow will produce a "bang bang" noise when flowing through the desorption pipeline from the carbon canister to the carbon canister solenoid valve. This noise seriously affects the driving experience and comfort, and is not conducive to the NVH management of the entire vehicle.

[0004] To solve the above problems, it is necessary to modify the existing desorption pipeline to reduce or eliminate abnormal noise and improve driving comfort. Utility Model Content

[0005] In view of this, the utility model provides a silencer type carbon canister desorption pipeline, in which a buffer tank with a silencer function is arranged on the pipeline body. The multi-chamber structure in the buffer tank cooperates with the inlet channel and the outlet channel to guide the airflow, so that after the airflow enters the buffer tank, a standing wave will be formed inside the buffer tank. The principle of air resonance is used to consume the sound wave energy generated by the airflow, so that the sound waves are absorbed and dissipated, so as to achieve the purpose of eliminating abnormal noise.

[0006] The utility model discloses a silencer type carbon canister desorption pipeline, comprising a pipeline body and a buffer tank arranged in the pipeline body, wherein a baffle is arranged in the buffer tank, and the baffle separates the buffer tank into a front cavity and a rear cavity, and the buffer tank is also provided with an inlet channel and an outlet channel, wherein the inlet channel is connected to the rear cavity, and the outlet channel is connected to the front cavity.

[0007] Furthermore, the baffle is provided with a connecting hole for connecting the front cavity with the rear cavity, and the connecting hole is eccentrically arranged.

[0008] Furthermore, the buffer tank includes a shell I and a shell II that are interlocked with each other, and the baffle is arranged at the joint surface of the shell I and the shell II. The baffle and the shell I constitute the front cavity, and the baffle and the shell II constitute the rear cavity.

[0009] Furthermore, the inlet channel is arranged on the axial end face of the shell I and is located in the front cavity. The rear end of the inlet channel passes through the baffle axially and extends to the rear cavity. The rear end of the inlet channel is provided with an inlet connecting port connecting the inlet channel with the rear cavity.

[0010] Furthermore, the outlet channel is arranged on the axial end face of the shell II and is located in the rear cavity. The front end of the outlet channel passes through the baffle axially and extends into the front cavity. The front end of the outlet channel is provided with an outlet connecting port that connects the outlet channel with the front cavity.

[0011] Furthermore, the front portion of the inlet channel extends forward in the axial direction and passes through the shell I to form an inlet joint, and the outer surface of the inlet joint has a corrugated structure.

[0012] Furthermore, the rear portion of the outlet channel extends axially backward and passes through the shell II to form an outlet joint, and the outer surface of the outlet joint has a corrugated structure.

[0013] Furthermore, the pipeline body includes a pipeline front section; the pipeline front section is connected to the inlet channel through an inlet joint.

[0014] Furthermore, the pipeline body includes a pipeline rear section, and the pipeline rear section is connected to the outlet channel through the outlet joint.

[0015] Furthermore, the baffle is provided with an inlet perforation hole for perforating an inlet channel and an outlet perforation hole for perforating an outlet channel, and the inlet perforation hole and the outlet perforation hole are arranged along the radial direction of the baffle.

[0016] Beneficial effects of the utility model:

[0017] This utility model discloses a silencer-type carbon canister desorption pipeline. A buffer tank with a silencer function is installed on the pipeline body. The buffer tank forms two interconnected chambers through a partition. The inlet and outlet channels respond to the flow of air, causing the airflow to first enter the rear chamber, then the front chamber, and finally flow out of the buffer tank. This winding flow path, combined with the buffer tank having a multi-chamber structure, causes the airflow to form standing waves inside the buffer tank after entering the buffer tank. The Holm-Hertz resonant cavity principle and the principle of air resonance are used to consume the sound wave energy generated by the airflow, so that the sound waves are absorbed and dissipated, thereby achieving the purpose of eliminating abnormal noise. This utility model can effectively improve the driving experience and comfort, and is more conducive to the NVH management of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2This is a schematic structural diagram of a buffer tank of the present utility model;

[0020] Figure 3 This is a front view of the buffer tank of the present utility model;

[0021] Figure 4 This is a left side view of the buffer tank of the present invention;

[0022] Figure 5 for Figure 4 Cross-sectional view at AA in the middle;

[0023] Figure 6 for Figure 4 Cross-sectional view at the middle BB;

[0024] Figure 7 This is a schematic structural diagram of the baffle of the present utility model. DETAILED DESCRIPTION

[0025] It should be noted that, in the description of this specification, the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. In this embodiment, unless otherwise specified, the side closest to the carbon canister is considered the front, and the side closest to the carbon canister solenoid valve is considered the rear. This is understood by those skilled in the art and will not be elaborated upon here.

[0026] As shown in the figure, an embodiment of the present invention provides a silencer-type carbon canister desorption pipeline, comprising a pipeline body and a buffer tank 1 disposed in the pipeline body. A baffle 8 is disposed in the buffer tank 1, which divides the buffer tank 1 into a front chamber 16 and a rear chamber 17. The buffer tank 1 is further provided with an inlet channel 9 and an outlet channel 10, wherein the inlet channel 9 is connected to the rear chamber 17, and the outlet channel 10 is connected to the front chamber 16. As shown in the figure, in this embodiment, the buffer tank 1 is divided into two chambers, the front chamber 16 and the rear chamber 17, by the baffle 8, and the two chambers are interconnected to facilitate airflow in the two chambers. The inlet channel 9 and the outlet channel 10 guide the airflow so that the airflow can flow into and out of the buffer tube along a specific path, thereby ensuring a silencer effect. In this embodiment, the airflow first flows into the rear cavity 17 from the inlet channel 9, then flows into the front cavity 16 through the rear cavity 17, and finally flows out of the buffer tank 1 from the front cavity 16 through the outlet channel 10. The buffer tank 1 fully relies on the Holm Hertz resonant cavity principle and the air resonance principle to absorb and dissipate the sound waves generated during the flow of the airflow, so as to achieve the purpose of eliminating NVH, effectively improve the driving experience and comfort, and is more conducive to the NVH management of the entire vehicle.

[0027] In this embodiment, the baffle 8 is provided with a connecting hole 13 for connecting the front cavity 16 with the rear cavity 17. The connecting hole 13 is eccentrically arranged, that is, the center of the connecting hole 13 is offset from the center of the baffle 8. At the same time, there can be one or more connecting holes 13, and in this embodiment, one is preferably provided to enhance the sound-absorbing effect. The baffle 8 is also provided with an inlet perforation 14 for perforating the inlet channel 9 and an outlet perforation 15 for perforating the outlet channel 10. The inlet perforation 14 and the outlet perforation 15 are arranged along the radial direction of the baffle 8. The line connecting the centers of the inlet perforation 14 and the outlet perforation 15 passes through the center of the baffle 8, and the connecting hole 13, the inlet perforation 14, and the outlet perforation 15 are distributed in a triangular shape.

[0028] In this embodiment, the buffer tank 1 comprises a housing I4 and a housing II5 that interlock. The baffle 8 is positioned at the interface between the housings I4 and II5. The baffle 8 and housing I4 form the front chamber 16, and the baffle 8 and housing II5 form the rear chamber 17. The buffer tank 1 in this embodiment is a split structure. The removable connection between housings I4 and II5 forms the cylindrical buffer tank 1. The baffle 8 cooperates with housings I4 and II5 to form the front chamber 16 and rear chamber 17, respectively. Together with the inlet channel 9 and outlet channel 10, the buffer tank 1 has a multi-chamber structure.

[0029] In this embodiment, the inlet channel 9 is disposed on the axial end surface of the housing 14 and is located within the front cavity 16. The rear end of the inlet channel 9 axially passes through the baffle 8 and extends to the rear cavity 17. An inlet connection port 11 is provided at the rear end of the inlet channel 9, connecting the inlet channel 9 with the rear cavity 17. The front portion of the inlet channel 9 extends axially forward through the housing 14 to form an inlet connector 6, the outer surface of which exhibits a corrugated structure. In this embodiment, the front portion of the inlet channel 9 is located outside the housing 14. The surface of the front portion of the inlet channel 9 is machined into a corrugated structure to serve as the inlet connector 6, facilitating connection with the pipeline body and improving connection reliability. The rear end of the inlet channel 9 passes through the inlet hole 14 and extends into the rear cavity 17. A through hole is provided along the rear end of the inlet channel 9 as the inlet connection port 11, connecting the inlet channel 9 with the rear cavity 17. Multiple inlet connection ports 11 may be provided, but in this embodiment, two are preferably provided along the axial direction of the inlet channel 9.

[0030] In this embodiment, the outlet channel 10 is provided on the axial end surface of the housing II 5 and is located within the rear cavity 17. The front end of the outlet channel 10 axially passes through the baffle 8 and extends into the front cavity 16. The front end of the outlet channel 10 is provided with an outlet communication port 12 that connects the outlet channel 10 with the front cavity 16. The rear portion of the outlet channel 10 extends axially rearward and passes through the housing II 5 to form an outlet joint 7, the outer surface of which has a corrugated structure. The rear part of the outlet channel 10 in this embodiment is located outside the shell Ⅱ5. The surface of the rear part of the outlet channel 10 is processed into a corrugated structure to serve as an outlet joint 7, which is convenient for connection with the pipeline body and can improve the connection reliability. The front end of the outlet channel 10 extends into the front cavity 16 after passing through the outlet through hole 15. The front end of the outlet channel 10 is provided with a through hole along its radial direction as an outlet connecting port 12 to connect the outlet channel 10 and the front cavity 16. At the same time, multiple outlet connecting ports 12 can be provided. In this embodiment, two are preferably provided along the axial direction of the outlet channel 10.

[0031] In this embodiment, the pipeline body includes a pipeline front section 2 and a pipeline rear section 3; the pipeline front section 2 is connected to the inlet channel 9 through the inlet joint 6; the pipeline rear section 3 is connected to the outlet channel 10 through the outlet joint 7. The pipeline front section 2 connects the inlet channel 9 with the carbon canister, and the pipeline rear section 3 connects the outlet channel 10 with the carbon canister solenoid valve, ensuring that the connection structure of the entire desorption pipeline is complete.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A mute carbon canister desorption pipeline, characterized by: It includes a pipeline body and a buffer tank arranged on the pipeline body, a baffle is arranged in the buffer tank, the baffle separates the buffer tank into a front cavity and a rear cavity, the buffer tank is also provided with an inlet channel and an outlet channel, the inlet channel is connected to the rear cavity, and the outlet channel is connected to the front cavity.

2. The mute carbon canister desorption pipeline according to claim 1, characterized in that: The baffle is provided with a communication hole for connecting the front cavity with the rear cavity, and the communication hole is eccentrically arranged.

3. The mute carbon canister desorption pipeline according to claim 1, characterized in that: The buffer tank includes a shell I and a shell II that are interlocked. The baffle is arranged at the joint surface of the shell I and the shell II. The baffle and the shell I constitute the front cavity, and the baffle and the shell II constitute the rear cavity.

4. The mute carbon canister desorption pipeline according to claim 3, characterized in that: The inlet channel is arranged on the axial end face of the shell I and is located in the front cavity. The rear end of the inlet channel passes through the baffle axially and extends to the rear cavity. The rear end of the inlet channel is provided with an inlet connecting port connecting the inlet channel with the rear cavity.

5. The mute carbon canister desorption pipeline according to claim 3, characterized in that: The outlet channel is arranged on the axial end face of the shell II and is located in the rear cavity. The front end of the outlet channel passes through the baffle axially and extends into the front cavity. The front end of the outlet channel is provided with an outlet connecting port connecting the outlet channel with the front cavity.

6. The mute carbon canister desorption pipeline according to claim 4, characterized in that: The front portion of the inlet passage extends forward in the axial direction and passes through the shell I to form an inlet joint, and the outer surface of the inlet joint has a corrugated structure.

7. The mute carbon canister desorption pipeline according to claim 5, characterized in that: The rear portion of the outlet passage extends axially rearward and passes through the shell II to form an outlet joint, and the outer surface of the outlet joint has a corrugated structure.

8. The mute carbon canister desorption pipeline according to claim 6, characterized in that: The pipeline body includes a pipeline front section; the pipeline front section is connected to the inlet channel through an inlet joint.

9. The mute carbon canister desorption pipeline according to claim 7, characterized in that: The pipeline body includes a pipeline rear section, and the pipeline rear section is connected to the outlet channel through the outlet joint.

10. The mute carbon canister desorption pipeline according to claim 1, characterized in that: The baffle is provided with an inlet perforation hole for perforating an inlet channel and an outlet perforation hole for perforating an outlet channel, and the inlet perforation hole and the outlet perforation hole are arranged along the radial direction of the baffle.

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