Desorption flow detection apparatus

Abstract

The utility model discloses a kind of desorption flow detection equipment, it is related to detection technical field, and desorption flow detection equipment includes: desorption pipeline, desorption pipeline is used to communicate with carbon tank;Air extraction device, air extraction device is communicated with desorption pipeline, air extraction device is used to air extraction to desorption pipeline to make the gas outside carbon tank flow through desorption pipeline by carbon tank;Flow detection device, flow detection device is used to detect the gas flow of flowing through desorption pipeline.By setting air extraction device to air extraction to desorption pipeline to make gas flow through desorption pipeline by carbon tank, flow detection device detects the gas flow of flowing through desorption pipeline, can detect the gas flow of flowing into carbon tank and reaching engine by electromagnetic valve, to judge whether the component that gas flows through is qualified, reduce the risk that fuel vapor cannot be desorbed in time leads to fuel vapor direct emission to atmosphere, it is favorable to reduce the pollutant emission of vehicle, improve the use cleanliness of vehicle and satisfy national standard requirement.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a desorption flow detection device. Background Technology

[0002] In related technologies, the desorption flow rate of a vehicle needs to meet certain requirements (e.g., desorption flow rate ≥ 1L / min). Insufficient desorption flow rate can easily lead to fuel vapor not being desorbed in time and sent into the engine for combustion. Fuel vapor being directly emitted into the atmosphere will cause air pollution. Therefore, there is an urgent need for a device that can detect the desorption flow rate of a vehicle. Utility Model Content

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a desorption flow detection device that detects the flow rate of gas flowing from the charcoal canister and through a solenoid valve to the engine, in order to determine whether the components through which the gas flows are qualified.

[0004] The desorption flow detection device according to an embodiment of the present invention includes: a desorption pipeline for communicating with a carbon canister; an extraction device for communicating with the desorption pipeline and for extracting air from the desorption pipeline so that gas outside the carbon canister flows through the carbon canister and into the desorption pipeline; and a flow detection device for detecting the flow rate of gas flowing through the desorption pipeline.

[0005] According to the desorption flow detection device of this utility model embodiment, by setting up an air extraction device to extract air from the desorption pipeline so that the gas flows through the charcoal canister and the flow detection device detects the gas flow rate through the desorption pipeline. It can detect the gas flow rate that flows from the charcoal canister and through the solenoid valve to reach the engine, so as to determine whether the components through which the gas flows are qualified. This reduces the risk of fuel vapor being directly emitted into the atmosphere due to the inability to desorb fuel vapor in time, which is conducive to reducing vehicle pollutant emissions, improving the cleanliness of vehicle use, and enabling the vehicle to meet national standards.

[0006] In some embodiments of this utility model, the gas extraction device includes: a gas supply mechanism and a gas extraction mechanism. The gas extraction mechanism is connected to the desorption pipeline. The gas supply mechanism is used to allow gas to flow into the gas extraction mechanism. The gas extraction mechanism is configured to extract gas from the desorption pipeline when the gas supply mechanism allows gas to flow into the gas extraction mechanism.

[0007] In some embodiments of this utility model, the air extraction mechanism is constructed as a Venturi structure.

[0008] In some embodiments of this utility model, the gas supply mechanism includes a gas storage container, which is selectively connected to a gas extraction mechanism so that the gas in the gas storage container selectively flows into the gas extraction mechanism.

[0009] In some embodiments of this utility model, the gas supply mechanism further includes: a gas supply pipeline, which is connected to a gas storage container and is also adapted to be connected to a gas extraction mechanism. The gas supply pipeline is provided with an on / off valve, which is used to selectively open the gas supply pipeline.

[0010] In some embodiments of this utility model, the gas supply mechanism further includes: a gas replenishment pipeline, which is connected to a gas storage container, and the gas replenishment pipeline is also adapted to be connected to a gas source so that gas flows into the gas storage container.

[0011] In some embodiments of this invention, the gas supply line has a one-way valve, which is configured to allow gas in the gas supply line to flow toward the gas storage container.

[0012] In some embodiments of this utility model, the desorption flow detection device further includes: a power supply, a desorption pipeline having a solenoid valve, the power supply being selectively connected to the solenoid valve, and the power supply selectively supplying power to the solenoid valve so that the solenoid valve selectively opens the desorption pipeline.

[0013] In some embodiments of this utility model, the flow detection device is configured as a flow meter, which is used to be installed in the desorption pipeline and connected in series with the solenoid valve.

[0014] In some embodiments of this utility model, the desorption flow detection device further includes a controller, which is communicatively connected to both the pumping device and the flow detection device. The controller is configured to enable the pumping device to selectively pump air from the desorption pipeline and is also configured to determine whether the components through which the gas flows are qualified based on the detection information received from the flow detection device.

[0015] In some embodiments of this utility model, the desorption flow detection device further includes: a control input unit and a display unit, both of which are communicatively connected to the controller. The control input unit is configured to send working instructions to the controller to cause the controller to control the operation of at least one of the pumping device and the power supply, and the controller is further configured to cause the display unit to display information.

[0016] In some embodiments of this invention, at least a portion of the desorption pipeline is constructed in the form of a vehicle; and / or a portion of the extraction device is constructed in the form of a vehicle.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1This is a schematic diagram of the desorption flow detection device and the carbon canister assembly during the detection of the carbon canister according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the desorption flow detection device according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of a charcoal canister on a vehicle according to an embodiment of the present invention.

[0022] Figure label:

[0023] Desorption flow rate detection equipment 100;

[0024] Desorption line 1; Solenoid valve 11;

[0025] 2. Air extraction device; 21. Air supply mechanism; 211. Air storage container; 212. Air supply pipeline; 213. On / off valve; 214. Air replenishment pipeline; 215. Check valve; 216. Pressure gauge; 217. Air source outlet; 22. Air extraction mechanism; 23. Venturi structure; 231. Air inlet; 232. Air outlet; 233. Air extraction port;

[0026] Flow detection device 3;

[0027] Power supply 4; Connector 41;

[0028] Controller 5;

[0029] Control input unit 6;

[0030] Display unit 7;

[0031] Flow meter 8; Inlet detection 81; Outlet detection 82;

[0032] Gas source 9;

[0033] 200 charcoal canister; 300 air filter; 400 turbocharger; 500 intercooler; 600 intake manifold; 601 throttle body; 700 engine ECU;

[0034] Vehicle 10. Detailed Implementation

[0035] The embodiments of this utility model 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] The following is for reference. Figures 1-3 Desorption flow detection device 100 according to an embodiment of the present utility model is described.

[0037] like Figures 1-3 As shown, the desorption flow rate detection device 100 according to an embodiment of the present invention includes: a desorption pipeline 1, which is connected to a carbon canister 200; an extraction device 2, which is connected to the desorption pipeline 1 and is used to extract air from the desorption pipeline 1 so that gas outside the carbon canister 200 flows through the carbon canister 200 and through the desorption pipeline 1; and a flow rate detection device 3, which is used to detect the flow rate of the gas flowing through the desorption pipeline 1.

[0038] The desorption pipeline 1 is connected to the charcoal canister 200. Gas outside the charcoal canister 200 can enter the desorption pipeline 1 through the charcoal canister 200. During the gas flow through the charcoal canister 200, it can carry away gasoline molecules inside the charcoal canister 200, reducing the number of gasoline molecules inside the charcoal canister 200 and thus restoring the adsorption capacity of the charcoal canister 200 for gasoline molecules, achieving the desorption effect. The extraction device 2 is connected to the desorption pipeline 1 so that the extraction device 2 can extract the gas inside the desorption pipeline 1. At this time, the pressure inside the desorption pipeline 1 is negative relative to atmospheric pressure. Under the action of atmospheric pressure, gas outside the charcoal canister 200 can flow through the charcoal canister 200 through the desorption pipeline 1. The flow detection device 3 can be configured as a flow meter 8. By setting the flow detection device 3 to detect the gas flow through the desorption pipeline 1, the desorption flow of the carbon canister 200 on the vehicle can be detected, thereby detecting whether the components through which the gas flows on the vehicle are qualified, reducing the risk of fuel vapor being directly emitted into the atmosphere due to the inability of fuel vapor to be desorbed in time, which is conducive to reducing the pollutant emissions of the vehicle 10, improving the cleanliness of the vehicle 10 and enabling the vehicle 10 to meet national standards.

[0039] Specifically, when it is necessary to test the desorption flow rate of the charcoal canister 200, the suction device 2 can be turned on. The suction device 2 can evacuate the desorption pipeline 1 to make the pressure inside the desorption pipeline 1 negative relative to the atmospheric pressure. Under the action of atmospheric pressure, the gas outside the charcoal canister 200 can flow through the charcoal canister 200 and the desorption pipeline 1. The flow detection device 3 detects the gas flow rate through the desorption pipeline 1 within a certain period of time to detect the desorption flow rate of the charcoal canister 200. The detected desorption flow rate is compared with the standard value (e.g., desorption flow rate ≥ 1L / min). The flow rate of gas flowing from the charcoal canister 200 and passing through the solenoid valve 11 to reach the engine is detected to determine whether the components through which the gas flows are qualified. This ensures that the desorption test of the vehicle 10 can meet the national standard requirements, which is beneficial to reducing the pollutant emissions of the vehicle 10 and improving the cleanliness of the vehicle 10.

[0040] Therefore, by setting up the air extraction device 2 to extract air from the desorption pipeline 1 so that the gas flows through the charcoal canister 200 through the desorption pipeline 1, and the flow detection device 3 detects the gas flow rate through the desorption pipeline 1, the flow rate of the gas flowing from the charcoal canister 200 and through the solenoid valve 11 to reach the engine can be detected. This allows for the detection of whether the components through which the gas flows in the vehicle are qualified, reducing the risk of fuel vapor being directly emitted into the atmosphere due to the inability to desorb fuel vapor in time. This is beneficial to reducing the pollutant emissions of the vehicle 10 and improving the cleanliness of the vehicle 10.

[0041] In some embodiments of this utility model, such as Figures 1-2 As shown, the gas extraction device 2 may include a gas supply mechanism 21 and a gas extraction mechanism 22. The gas extraction mechanism 22 is connected to the desorption pipeline 1. The gas supply mechanism 21 is used to allow gas to flow into the gas extraction mechanism 22. The gas extraction mechanism 22 is configured to extract gas from the desorption pipeline 1 when the gas supply mechanism 21 allows gas to flow into the gas extraction mechanism 22.

[0042] In some embodiments of this application, the extraction mechanism 22 can be configured as a Venturi structure 23. In some embodiments of this application, the extraction mechanism 22 can be configured as a vacuum pump structure. The extraction mechanism 22 is connected to the desorption pipeline 1 to facilitate the extraction of gas from the desorption pipeline 1. The gas supply mechanism 21 is used to allow gas to flow into the extraction mechanism 22. When the gas supply mechanism 21 allows gas to flow into the extraction mechanism 22, the gas velocity in the extraction mechanism 22 is high and the pressure is low, so that the pressure in the extraction mechanism 22 is lower than the pressure in the desorption pipeline 1. This achieves the effect of the extraction mechanism 22 extracting gas from the desorption pipeline 1 when the gas supply mechanism 21 allows gas to flow into the extraction mechanism 22, thus making the pressure in the desorption pipeline 1 negative relative to atmospheric pressure. This facilitates the flow of gas outside the carbon canister 200 through the carbon canister 200 and into the desorption pipeline 1, thereby facilitating the measurement of the desorption flow rate by the flow detection device 3.

[0043] In some embodiments of this utility model, such as Figure 1 As shown, the air extraction mechanism 22 is constructed as a Venturi structure 23.

[0044] The extraction mechanism 22 can be constructed as a Venturi structure 23, which includes an inlet 231, an outlet 232, and an extraction port 233. The pipeline between the inlet 231 and the outlet 232 is constructed as a contraction pipeline, and the extraction port 233 is connected to the desorption pipeline 1. When the gas supply mechanism 21 supplies gas to the extraction mechanism 22, the gas enters the contraction pipeline from the inlet 231. Due to the contraction of the pipeline, the gas velocity in the contraction pipeline increases, creating a negative pressure area within the contraction pipeline. This allows the extraction port 233 to extract gas from the desorption pipeline 1, enabling gas outside the carbon canister 200 to flow through the carbon canister 200 and into the desorption pipeline 1, thus facilitating the measurement of the desorption flow rate. By constructing the extraction mechanism 22 as a Venturi structure 23, the structure of the extraction mechanism 22 can be simplified, thereby reducing the maintenance cost of the extraction device 2 and improving the economic efficiency of the desorption flow rate detection device 100.

[0045] In some embodiments of this utility model, such as Figures 1-2 As shown, the gas supply mechanism 21 may include a gas storage container 211, which is selectively connected to the gas extraction mechanism 22 so that the gas in the gas storage container 211 selectively flows into the gas extraction mechanism 22.

[0046] The gas storage container 211 can be constructed, but is not limited to, a gas cylinder or gas tank, etc., to store gas, thereby increasing the gas reserve. The gas storage container 211 can be connected to the extraction mechanism 22, allowing the gas inside to flow into the extraction mechanism 22, thus enabling the extraction mechanism 22 to extract gas from the desorption pipeline 1. By setting up the gas storage container 211, the gas stored in it can flow into the extraction mechanism 22. When the gas in the gas storage container 211 is insufficient, it can be connected to the gas source 9 to replenish the gas, thereby improving the reliability of the gas supply mechanism 21 and facilitating the smooth detection of the desorption flow rate.

[0047] In some embodiments of this utility model, such as Figures 1-2 As shown, the gas supply mechanism 21 may further include: a gas supply pipeline 212, which is connected to the gas storage container 211. The gas supply pipeline 212 is also adapted to be connected to the gas extraction mechanism 22. The gas supply pipeline 212 is provided with an on / off valve 213, which is used to selectively open the gas supply pipeline 212.

[0048] The gas supply line 212 can be connected between the gas storage container 211 and the extraction mechanism 22, so that the gas supply line 212 is connected to both the gas storage container 211 and the extraction mechanism 22, which facilitates the flow of gas in the gas storage container 211 to the extraction mechanism 22 through the gas supply line 212. The on / off valve 213 can be configured as a throttle valve. The gas supply line 212 is equipped with the on / off valve 213. When the gas storage container 211 needs to supply gas to the extraction mechanism 22, the on / off valve 213 opens, and the gas supply line 212 is open, so that the gas in the gas storage container 211 can flow smoothly to the extraction mechanism 22 through the gas supply line 212. When the gas storage container 211 does not need to supply gas to the extraction mechanism 22, the on / off valve 213 is closed and the gas supply line 212 is disconnected, reducing the risk of gas pressure changes in the extraction mechanism 22 caused by the free flow of gas in the gas supply line 212, thereby improving the detection accuracy of desorption flow rate. In addition, it helps to reduce gas waste in the gas storage container 211 and save resources.

[0049] Furthermore, by controlling the opening degree of the on / off valve 213, the pressure of the gas flowing from the gas storage container 211 to the extraction mechanism 22 can be changed. This allows the measurement personnel to adjust the gas pressure according to the actual measurement conditions, which helps to improve the stability and controllability of the gas pressure flowing to the extraction mechanism 22, thereby further improving the detection accuracy of the desorption flow rate.

[0050] In some embodiments of this utility model, such as Figure 2 As shown, the gas supply mechanism 21 may further include: a gas supply line 214, which is connected to the gas storage container 211, and the gas supply line 214 is also adapted to be connected to the gas source 9 so that gas flows into the gas storage container 211.

[0051] The gas supply line 214 can be connected between the gas source 9 and the gas storage container 211, so that the gas supply line 214 connects the gas storage container 211 and the gas source 9. The gas source 9 can output compressed gas, which enters the gas storage container 211 through the gas supply line 214, thereby ensuring sufficient gas in the gas storage container 211 and reducing the risk of unstable gas flow or pressure to the extraction mechanism 22 due to insufficient gas in the gas storage container 211. By setting the gas source 9 to input adjustable and stable gas pressure into the gas storage container 211, the risk of insufficient gas in the gas storage container 211 can be reduced, which is beneficial to improving the reliability of the desorption flow detection device 100 and the detection accuracy of the desorption flow.

[0052] In some embodiments of this utility model, such as Figure 2 As shown, the gas supply line 214 has a one-way valve 215, which is configured to allow gas in the gas supply line 214 to flow toward the gas storage container 211.

[0053] The one-way valve 215 allows gas in the gas supply line 214 to flow towards the gas storage container 211, ensuring smooth gas flow and reducing the risk of eddies caused by uncontrolled gas flow within the gas supply line 214. Furthermore, the one-way valve 215 also reduces the risk of gas flowing back towards the gas source 9 from the gas storage container 211, thereby improving the safety and lifespan of both the gas storage container 211 and the gas source 9.

[0054] In some embodiments of this utility model, such as Figures 1-2 As shown, the desorption flow detection device 100 may further include: a power supply 4, a desorption pipeline 1 having a solenoid valve 11, the power supply 4 being selectively connected to the solenoid valve 11, and the power supply 4 selectively supplying power to the solenoid valve 11 so that the solenoid valve 11 selectively opens the desorption pipeline 1.

[0055] The power supply 4 may have a connector 41, and the desorption pipeline 1 has a solenoid valve 11. When it is necessary to measure the desorption flow rate, the connector 41 of the power supply 4 is connected to the solenoid valve 11. The power supply 4 can be a 12V PWM (Pulse Width Modulation) power supply, outputting 12V DC power according to the PWM wave. The frequency of the power supply 4 is adjustable, and the duty cycle of the power supply 4 is adjustable within the range of 0-100% to meet the working requirements of the solenoid valve 11. The connection between the power supply 4 and the solenoid valve 11 allows the power supply 4 to supply power to the solenoid valve 11, enabling the solenoid valve 11 to conduct the desorption pipeline 1, facilitating the measurement of the desorption flow rate by the desorption flow detection device 100. When it is not necessary to measure the desorption flow rate, the power supply 4 is disconnected from the solenoid valve 11, reducing the risk of reduced lifespan of the solenoid valve 11 due to continuous energization.

[0056] In some embodiments of this utility model, such as Figures 1-2 As shown, the flow detection device 3 is constructed as a flow meter 8, which is used to be installed in the desorption pipeline 1 and connected in series with the solenoid valve 11.

[0057] The flow detection device 3 can be configured as a flow meter 8, which can be installed in the desorption pipeline 1. For example, the flow meter 8 can be installed between the solenoid valve 11 and the carbon canister 200, or it can be connected to the desorption pipeline 1 on the side of the solenoid valve 11 away from the carbon canister 200.

[0058] The flowmeter 8 may have a detection inlet 81 and a detection outlet 82. When the flowmeter 8 is installed between the solenoid valve 11 and the charcoal canister 200, the detection inlet 81 is connected to the charcoal canister 200, and the detection outlet 82 is connected to the solenoid valve 11. When the flowmeter 8 is installed on the desorption pipeline 1 on the side of the solenoid valve 11背离charcoal canister 200, the detection inlet 81 is connected to the solenoid valve 11, and the detection outlet 82 is connected to the air extraction device 2, so that the flowmeter 8 and the solenoid valve 11 are connected in series, so that the gas flow rate through the solenoid valve 11 is equal to the gas flow rate through the flowmeter 8, which is beneficial to make the gas flow rate detected by the flowmeter 8 be the desorption flow rate of the solenoid valve 11, thereby reducing the detection error of the desorption flow rate and improving the detection accuracy of the desorption flow rate.

[0059] In some embodiments of the present invention, such as Figure 2 shown, the desorption flow rate detection device 100 may further include: a controller 5, the controller 5 is communicatively connected to both the air extraction device 2 and the flow rate detection device 3, and the controller 5 is configured to selectively extract air from the desorption pipeline 1 by the air extraction device 2, and is further configured to determine whether the components through which the gas flows are qualified according to the detection information received by the flow rate detection device 3.

[0060] Among them, as some embodiments of the present application, the controller 5 is connected to both the air extraction device 2 and the flow rate detection device 3 through data lines. As some embodiments of the present application, the controller 5 is connected to both the air extraction device 2 and the flow rate detection device 3 through Bluetooth, so that the controller 5 is communicatively connected to both the air extraction device 2 and the flow rate detection device 3, so that the controller 5 can control the air extraction device 2 to selectively extract air from the desorption pipeline 1, and can also receive the detection information of the flow rate detection device 3 to determine whether the components through which the gas flows are qualified.

[0061] Specifically, when it is necessary to detect the desorption flow rate of the charcoal canister 200, the measuring personnel control the controller 5, and the controller 5 controls the opening and closing valve 213 to open, and the gas in the gas storage container 211 flows into the air extraction mechanism 22 to control the air extraction device 2 to extract air from the desorption pipeline 1. At this time, the pressure in the desorption pipeline 1 is negative relative to the atmospheric pressure, so that the gas outside the charcoal canister 200 can flow through the desorption pipeline 1 through the charcoal canister 200. The flow rate detection device 3 detects the gas flow rate through the desorption pipeline 1. The controller 5 receives the gas flow rate information detected by the flow rate detection device 3, and compares the received flow rate information with the standard information (for example: desorption flow rate ≥ 1 L / min). When the received flow rate information ≥ 1 L / min, all the components through which the gas flows are qualified. When the received flow rate information < 1 L / min, the components through which the gas flows are unqualified. It should be noted that when it is not necessary to detect the desorption flow rate, the controller 5 controls the opening and closing valve 213 to close.

[0062] It should be noted that there is an unclear expression "背离charcoal canister 200" in the original text. It is recommended to check and correct it according to the actual situation. The translation is for reference only.By setting controller 5, intelligent detection of desorption flow can be achieved, which effectively reduces the measurement difficulty and workload of measurement personnel, and helps to improve the detection efficiency of desorption flow, thereby improving the detection efficiency of carbon canister 200.

[0063] In some embodiments of this utility model, such as Figure 2 As shown, the desorption flow detection device 100 may further include: a control input unit 6 and a display unit 7. Both the control input unit 6 and the display unit 7 are communicatively connected to the controller 5. The control input unit 6 is configured to send working instructions to the controller 5 so that the controller 5 controls the operation of at least one of the air extraction device 2 and the power supply 4. The controller 5 is also configured to make the display unit 7 display information.

[0064] In some embodiments of this application, both the control input unit 6 and the display unit 7 are connected to the controller 5 via data cables. In other embodiments, both the control input unit 6 and the display unit 7 are connected to the controller 5 via Bluetooth. The operator's control input unit 6 can send operating commands to the controller 5, causing the controller 5 to control the operation of at least one of the vacuum device 2 and the power supply 4. Furthermore, the controller 5 is communicatively connected to the power supply 4, and the controller 5 can control whether the power supply 4 supplies power to the solenoid valve 11. The operator can also input control information, such as PWM parameters, and standard information (e.g., desorption flow rate ≥ 1 L / min) through the control input unit 6 to provide a reference for the controller 5's judgment. It should be noted that the value of the standard information can be set as needed, thereby improving the versatility of the controller 5 in detecting the desorption flow rate of different carbon canisters 200.

[0065] The controller 5 can also enable the display unit 7 to display information such as desorption flow rate, pressure, and judgment results. When the received flow rate is ≥1L / min, the display unit 7 displays "qualified"; when the received flow rate is <1L / min, the display unit 7 displays "unqualified". Furthermore, the measurement personnel can control the controller input unit 6 to make the controller 5 control the display unit 7 to display measurement records, which is beneficial for reviewing measurement results. The measurement personnel can also send information from the controller 5 to other devices, such as mobile phones and computers. Control and display functions can be added or removed according to actual measurement needs, further enhancing the intelligence of the desorption flow rate detection device 100.

[0066] As some embodiments of this application, such as Figure 2As shown, the gas supply line 212 may also have a pressure gauge 216 and a gas source outlet 217. The gas source outlet 217 is connected to the air extraction device 2. The pressure gauge 216 can detect the gas pressure in the gas supply line 212. By setting the pressure gauge 216, the measuring personnel can accurately adjust the opening degree of the opening and closing valve 213 according to the reading of the pressure gauge 216, thereby facilitating the supply of gas with suitable pressure to the air extraction device 2.

[0067] In some embodiments of this utility model, such as Figure 1 As shown, at least a portion of the desorption line 1 is constructed in the form of the vehicle 10; and / or a portion of the extraction device 2 is constructed in the form of the vehicle 10.

[0068] In some embodiments of this application, at least a portion of the desorption pipeline 1 is constructed in the form of a vehicle 10. In some embodiments of this application, a portion of the extraction device 2 is constructed in the form of a vehicle 10. In some embodiments of this application, at least a portion of the desorption pipeline 1 is constructed in the form of a vehicle 10, and a portion of the extraction device 2 is constructed in the form of a vehicle 10. This application will describe an example where the desorption pipeline 1 is entirely constructed in the form of a vehicle 10, and a portion of the extraction device 2 is constructed in the form of a vehicle 10; for example, the extraction mechanism 22 is constructed in the form of a vehicle 10. Furthermore, the carbon canister 200 and the solenoid valve 11 can both be constructed as the structure of the vehicle 10. This configuration makes the structure of the desorption flow detection device 100 reasonable. During the detection of desorption flow, the components of the vehicle 10 itself can be directly used, such as the desorption pipeline 1 and the extraction mechanism 22. There is no need to remove the carbon canister 200 from the vehicle 10 and connect it to other desorption pipelines 1. This reduces the production cost of the desorption flow detection device 100, and also simplifies the detection process and difficulty of desorption flow, which is conducive to improving the detection efficiency of desorption flow.

[0069] Specifically, when detecting desorption flow, the connection between the solenoid valve 11 and the wiring harness of the vehicle 10 can be disconnected, and the connector 41 of the power supply 4 can be connected to the solenoid valve 11 so that the power supply 4 supplies power to the solenoid valve 11. This allows the solenoid valve 11 to be energized without starting the engine of the vehicle 10, which helps to reduce the difficulty of detecting desorption flow and improve the detection efficiency of desorption flow.

[0070] When the flow meter 8 is installed between the solenoid valve 11 and the carbon canister 200, the interface between the carbon canister 200 and the solenoid valve 11 can be disconnected, so that the flow meter 8 is connected between the solenoid valve 11 and the carbon canister 200. When the flow meter 8 is installed on the desorption pipeline 1 on the side of the solenoid valve 11 away from the carbon canister 200, the interface between the solenoid valve 11 and the suction device 2 can be disconnected, so that the flow meter 8 is connected between the solenoid valve 11 and the suction device 2.

[0071] The extraction mechanism 22 is connected to the gas supply mechanism 21, enabling the controller 5 to communicate with both the extraction device 2 and the flow detection device 3. The controller 5 can also communicate with the gas source 9. When it is necessary to detect the desorption flow rate of the carbon canister 200, the operator controls the controller 5, which in turn controls the opening and closing valve 213 to open. Gas from the gas storage container 211 flows into the extraction mechanism 22, controlling the extraction device 2 to extract gas from the desorption pipeline 1. At this time, the pressure in the desorption pipeline 1 is negative relative to atmospheric pressure, allowing gas from outside the carbon canister 200 to flow through the carbon canister 200 and into the desorption pipeline 1. The flow detection device 3 detects the gas flow rate through the desorption pipeline 1. The controller 5 receives the gas flow rate information detected by the flow detection device 3 and compares the received flow rate information with standard information (e.g., desorption flow rate ≥ 1 L / min). If the received flow rate information is ≥ 1 L / min, the components through which the gas flows are qualified; if the received flow rate information is < 1 L / min, the components through which the gas flows are unqualified. It should be noted that when the gas in the gas storage container 211 is insufficient, the controller 5 can control the gas source 9 to replenish the gas in the gas storage container 211. When it is not necessary to detect the desorption flow rate of the charcoal canister 200, the controller 5 controls the on / off valve 213 to close.

[0072] The measurement operator's control input unit 6 can send operating commands to the controller 5, causing the controller 5 to control the operation of at least one of the suction device 2 and the power supply 4. Furthermore, the controller 5 is communicatively connected to the power supply 4, and can control whether the power supply 4 supplies power to the solenoid valve 11. The measurement operator can also input control information, such as PWM parameters, and standard information (e.g., desorption flow rate ≥ 1 L / min) through the control input unit 6 to provide a reference for the controller 5's judgment. It should be noted that the value of the standard information can be set as needed, thereby improving the versatility of the controller 5 in detecting the desorption flow rate of different carbon canisters 200.

[0073] The controller 5 can also enable the display unit 7 to display information such as desorption flow rate, pressure, and judgment results. When the received flow rate is ≥1L / min, the display unit 7 displays "qualified"; when the received flow rate is <1L / min, the display unit 7 displays "unqualified". Furthermore, the measurement personnel can control the controller input unit 6 to make the controller 5 control the display unit 7 to display measurement records, which is beneficial for reviewing measurement results. The measurement personnel can also send information from the controller 5 to other devices, such as mobile phones and computers. Control and display functions can be added or removed according to actual measurement needs, further enhancing the intelligence of the desorption flow rate detection device 100.

[0074] As some embodiments of this application, such as Figure 3As shown, when the engine of vehicle 10 is in turbocharged condition, air enters through the air filter 300 and is pressurized by the turbocharger 400. After being cooled by the intercooler 500, the pressurized air enters the engine intake manifold 600 through the throttle valve 601, thus preparing to enter the engine for combustion. Because the air has been pressurized, the pressure inside the intake manifold 600 is higher than atmospheric pressure, that is, the pressure inside the manifold is positive relative to atmospheric pressure. At this time, the principle of negative pressure vacuum cannot be used to desorb the charcoal canister 200. Therefore, a venturi structure 23 is designed on vehicle 10 equipped with a turbocharged engine. The positive pressure inside the intake manifold 600 generates airflow (driving airflow), which flows through the contraction pipe and generates negative pressure at the contraction pipe. When the engine ECU700 (Engine Control Unit) controls the opening of the solenoid valve 11 of the charcoal canister 200, the negative pressure creates a vacuum, allowing external gas to enter the charcoal canister 200, then through the solenoid valve 11 into the venturi structure 23, and finally merges with the drive airflow into the pipeline between the air filter 300 and the turbocharger 400.

[0075] As some embodiments of this application, the desorption flow detection device 100 of this application can be combined or disassembled as needed to adapt to different models of carbon canisters 200.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 the present invention. 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.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A desorption flow rate detection device for vehicle charcoal canisters, characterized in that, include: A desorption pipeline, which is used to connect to the carbon canister; An extraction device is connected to the desorption pipeline and is used to extract air from the desorption pipeline so that gas outside the carbon canister flows through the carbon canister and the desorption pipeline. A flow detection device is used to detect the gas flow rate through the desorption pipeline.

2. The desorption flow rate detection device according to claim 1, characterized in that, The gas extraction device includes a gas supply mechanism and a gas extraction mechanism. The gas extraction mechanism is connected to the desorption pipeline. The gas supply mechanism is used to allow gas to flow into the gas extraction mechanism. The gas extraction mechanism is configured to extract gas from the desorption pipeline when the gas supply mechanism allows gas to flow into the gas extraction mechanism.

3. The desorption flow rate detection device according to claim 2, characterized in that, The air extraction mechanism is constructed using a Venturi structure.

4. The desorption flow rate detection device according to claim 2, characterized in that, The gas supply mechanism includes a gas storage container, which is selectively connected to the gas extraction mechanism so that the gas in the gas storage container selectively flows into the gas extraction mechanism.

5. The desorption flow rate detection device according to claim 4, characterized in that, The gas supply mechanism further includes: a gas supply pipeline, which is connected to the gas storage container and is also adapted to be connected to the gas extraction mechanism. The gas supply pipeline is provided with an on / off valve, which is used to selectively open the gas supply pipeline.

6. The desorption flow rate detection device according to claim 4, characterized in that, The gas supply mechanism further includes a gas replenishment pipeline, which is connected to the gas storage container and is also adapted to be connected to a gas source so that gas flows into the gas storage container.

7. The desorption flow rate detection device according to claim 6, characterized in that, The gas supply line has a one-way valve configured to allow gas in the gas supply line to flow toward the gas storage container.

8. The desorption flow rate detection device according to claim 1, characterized in that, Also includes: A power source is provided, wherein the desorption line has a solenoid valve, the power source is selectively connected to the solenoid valve, and the power source selectively supplies power to the solenoid valve so that the solenoid valve selectively opens the desorption line.

9. The desorption flow rate detection device according to claim 8, characterized in that, The flow detection device is configured as a flow meter, which is used to install in the desorption pipeline and connected in series with the solenoid valve.

10. The desorption flow rate detection device according to claim 8, characterized in that, Also includes: The controller is communicatively connected to both the extraction device and the flow detection device. The controller is configured to enable the extraction device to selectively extract gas from the desorption pipeline and is also configured to determine whether the components through which the gas flows are qualified based on the detection information received from the flow detection device.

11. The desorption flow rate detection device according to claim 10, characterized in that, Also includes: The system includes a control input unit and a display unit, both of which are communicatively connected to the controller. The control input unit is configured to send operating instructions to the controller to enable the controller to control the operation of at least one of the vacuum device and the power supply. The controller is also configured to enable the display unit to display information.

12. The desorption flow rate detection device according to any one of claims 1-11, characterized in that, At least a portion of the desorption line is constructed in accordance with the structure of the vehicle; and / or The exhaust device is partially constructed as the vehicle structure.

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