A vehicle fuel collection system

Abstract

This invention belongs to the field of liquid fuel vehicles, specifically relating to a vehicle fuel sampling system. When the controller and the network platform are communicating normally, if the refueling indicator equals the refueling set value, sampling begins sequentially from the sampling chamber according to the sampling indicator, and the corresponding inlet switch is opened. After sampling, the inlet switch of the sampling chamber is closed, and the sampling indicator is stored as the sampling chamber number and the fuel quantity at power-off. The sampling indicator is assigned to the sampling identifier. If the sampling identifier does not equal the set value, the outlet switch of the sampling chamber is opened sequentially to sample the sampling chamber. The designed automatic fuel sampling system is connected to the return fuel line. Combining sampling and sampling control methods, automatic collection, convenient sampling, and fuel tracking of vehicle fuel samples are achieved, providing a key technical solution for the realization of closed-loop fuel quality control.

Description

Technical Field

[0001] This invention belongs to the technical field of liquid fuel vehicles, specifically relating to a vehicle fuel collection system. Background Technology

[0002] With the increasing deterioration of the global environment, air quality has received growing attention. Traditional fuel vehicles, especially medium and heavy-duty commercial vehicles, contribute significantly to carbon emissions. Therefore, standards for vehicle emissions are constantly being raised to reduce emissions by improving engine combustion performance, after-treatment system performance, and fuel quality. Fuel, as the initial source of the combustion medium, not only directly affects final emissions indicators but also indirectly influences them by impacting the reliability and durability of the engine's fuel system and after-treatment system. However, given the complexity of fuel sources and the varying quality of fuel, monitoring fuel sources and quality has become a crucial factor in achieving vehicle emissions targets.

[0003] Currently, the industry can only check the quality of fuel when refueling a vehicle by sampling the fuel in the current fuel tank. It is impossible to track the vehicle's historical refueling information and fuel quality, and it is impossible to achieve closed-loop control of the quality of fuel refueling. The sampling inspection of fuel quality is point-to-point, and the overall fuel quality management and tracking is relatively passive. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle fuel sampling system to solve the problem that checking the quality of fuel refueling in a vehicle can only sample the fuel in the current fuel tank, and cannot track the vehicle's historical refueling information and fuel quality, thus making it impossible to manage and track all fuel types.

[0005] To address the aforementioned technical problems, this invention provides a vehicle fuel collection system. The system includes a fuel collection pipeline, with an inlet connected to the engine return fuel outlet pipeline and an outlet connected to the fuel tank inlet pipeline. The system also includes a controller, a sampler, and several collection chambers. The controller controls the inlet and outlet switches connected to each collection chamber. When the inlet switch is open, fuel from the fuel collection pipeline enters the corresponding collection chamber; when the outlet switch is open, fuel from the collection chamber enters the sampler for storage.

[0006] Its beneficial effects are as follows: Based on the original fuel circulation system, this invention connects the vehicle fuel collection system to the return fuel line. The inlet of the fuel collection line is used to connect to the engine return fuel outlet line, and the outlet is used to connect to the fuel tank inlet line. The controller controls the inlet and outlet switches of the collection chamber. When the inlet switch is open, the fuel from the fuel collection return line enters the corresponding collection chamber. When the outlet switch is open, the fuel in the collection chamber enters the sampler for storage. Different collection chambers can sample fuel from different gas stations, facilitating quality management and tracking of the fuel in the current tank and historical refueling information. This achieves closed-loop control of vehicle fuel quality, enabling automatic collection, convenient sampling, and fuel tracking of vehicle fuel samples, providing a key technical solution for the realization of closed-loop fuel quality control.

[0007] Furthermore, it also includes a fuel return line, and when the outlet switch is in the open state, the fuel in the collection chamber enters the sampler through the fuel return line, and the outlet of the fuel return line is used to connect to the fuel tank.

[0008] Its beneficial effects are as follows: When the outlet switch is in the open state, the fuel in the sampling chamber enters the sampler through the fuel sampling pipeline, making the sampling method convenient.

[0009] Furthermore, the fuel inlet of the fuel collection line is connected to the engine return fuel outlet line via a quick-connect valve, and the fuel outlet is connected to the fuel tank inlet line via a quick-connect valve.

[0010] Its beneficial effects are as follows: The inlet of the fuel collection and return pipeline of this invention is equipped with a quick-connect valve, which facilitates installation.

[0011] Furthermore, the vehicle fuel sampling system uses the following fuel sampling method to sample vehicle fuel: after the vehicle is started, if the vehicle is in refueling mode, the following sampling process is performed: the inlet switch of the sampling chamber corresponding to the sampling identifier is opened according to the value of the sampling identifier and held for a certain period of time, then the inlet switch of the sampling chamber is closed and the sampling identifier is updated, thereby completing the sampling; wherein, the value of the sampling identifier corresponding to different sampling chambers is different.

[0012] Its beneficial effects are as follows: If the vehicle is in a refueling state after starting, this invention determines whether to refuel based on changes in the fuel tank level signal, identifies the refueling location (gas station) based on the refueling coordinates, and sends a sampling command to the controller after determining that sampling is required. The controller then opens the corresponding sampling chamber for sampling. The inlet switch of the sampler is opened after a certain period of time after refueling and closed after sampling is complete, achieving automatic collection of vehicle fuel samples and improving convenience.

[0013] Furthermore, the vehicle fuel sampling system is used to sample vehicle fuel using the following method: sampling fuel in each sampling chamber according to the sampling order and sampling identifier.

[0014] Its beneficial effects are as follows: when taking out fuel samples, first close the return oil circuit switch regulating valve, press the button switch integrated on the controller, and take out fuel samples from different fuel collection chambers in sequence, thus achieving automatic sampling of vehicle fuel samples and improving convenience.

[0015] Furthermore, if there is no sampling chamber corresponding to the value of the sampling identifier, the inlet and outlet switches of the corresponding sampling chamber are opened according to the sampling chamber corresponding to the cyclic sampling identifier, so that the fuel in the fuel sampling pipeline enters the corresponding sampling chamber and the fuel in the sampling chamber enters the sampler, and this continues for a certain period of time. Then, the outlet switch of the corresponding sampling chamber is closed first, and the inlet switch of the corresponding sampling chamber is closed, and the cyclic sampling identifier is updated, thereby completing this sampling.

[0016] Its beneficial effects are as follows: When a sampling cavity with a value corresponding to the sampling identifier exists, the inlet and outlet switches of the sampling cavity corresponding to the sampling identifier are opened, so as to realize the sampling of the sampling cavity in sequence and improve the convenience of sampling.

[0017] Furthermore, when opening the inlet switch of the collection chamber corresponding to the sampling mark, it is also necessary to store the gas station name and location information when the vehicle is refueling at the location corresponding to the sampling mark.

[0018] Its beneficial effects are: storing the name and location information of the gas station when the vehicle is refueling as the location corresponding to the sampling identifier, so that the fuel can be tracked later based on the records.

[0019] Furthermore, when the inlet switch of the collection chamber corresponding to the sampling identifier is opened, the name of the gas station where the vehicle was refueled and its location information must also be displayed.

[0020] Its beneficial effects include: displaying the name and location information of the gas station when the vehicle is refueled, making it easier to understand the quality of the fuel.

[0021] Furthermore, if the value of the sampling identifier indicates that fuel has been collected in part of the collection chamber, it is necessary to compare the current gas station information with other collected gas station information. If the current gas station information is different from other collected gas station information, the sampling process is performed.

[0022] Its beneficial effect is that it compares the gas station information collected this time with other gas station information that has been collected. If they are the same, there is no need to sample again, thus improving efficiency. Attached Figure Description

[0023] Figure 1This is a schematic diagram illustrating the automatic fuel sampling principle of the present invention;

[0024] Figure 2 This invention relates to the composition and structure of an automatic fuel sampling system.

[0025] Figure 3 This invention relates to the principle of obtaining refueling identification and gas station name on the intelligent connected platform.

[0026] Figure 4 This is a schematic diagram of one type of control principle for the fuel sampling system of the present invention;

[0027] Figure 5 This is another control principle diagram for the fuel sampling system of the present invention;

[0028] Figure 6 This is a schematic diagram of the sampling control principle of the fuel sampling system of the present invention.

[0029] Figure label:

[0030] 101. Fuel tank; 102. Fuel inlet line; 103. Engine; 104. Bus; 105. Instrument panel; 106. Fuel return line; 107. Fuel return line quick-connect valve; 108. Fuel inlet line of the automatic fuel acquisition system; 109. Automatic fuel acquisition system; 110. Fuel outlet line of the automatic fuel acquisition system; 111. Fuel return line quick-connect valve; 112. Wireless network; 113. Intelligent network platform; 201. Fuel return line; 202. Fuel return line quick-connect valve; 20 3. Fuel sampling chamber outlet switch integrated circuit; 204. Fuel sampling chamber inlet switch; 205. Fuel automatic sampling system controller; 206. Fuel sampling chamber inlet switch integrated circuit; 207. Return oil circuit quick-connect valve; 208. Return oil line; 209. Fuel sampling chamber; 210. Fuel automatic sampling system return oil line; 211. Return oil line switch regulating valve; 212. Fuel automatic sampling system drain plug; 213. Fuel sampling chamber outlet switch. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of this invention.

[0032] Example of a vehicle fuel collection system:

[0033] like Figure 1 The diagram shows the automatic fuel sampling principle of this embodiment. 101 is the fuel tank in the vehicle, and 103 is the engine. The engine 103 is connected to the fuel tank 101 via an inlet fuel line 102. The engine 103 is connected to the instrument cluster 105 via a bus 104. The vehicle fuel sampling system 109 of this embodiment is designed for vehicles powered by a liquid fuel engine 103. Based on the existing fuel circulation system, the vehicle fuel sampling system 109 is connected to the return fuel line 106 via an automatic fuel sampling system inlet fuel line 108 and an automatic fuel sampling system outlet fuel line 110. Furthermore, the vehicle fuel sampling system 109 is connected to the intelligent connected platform 113 via a wireless network 112.

[0034] like Figure 2 The vehicle fuel sampling system shown includes a fuel sampling line, a return line quick-connect valve 107, a return line quick-connect valve 202, an outlet line quick-connect valve 111, an outlet line quick-connect valve 207, a fuel sampling chamber inlet switch 204, a fuel sampling system controller 205, a fuel sampling chamber inlet switch integrated circuit 206, a fuel sampling chamber outlet switch integrated circuit 203, a fuel sampling system return line 210 connected to the fuel tank, several fuel sampling chambers 209, a return line switch regulating valve 211, a fuel sampling system drain plug 212, an automatic fuel sampling system drain plug 212, and a fuel sampling chamber outlet switch 213. The fuel inlet of the fuel sampling line 201 is connected to the return line 201 (engine return outlet) via the return line quick-connect valve 202, and the fuel outlet of the fuel sampling line 201 is connected to the return line 208 (connected to the fuel tank) via the outlet line quick-connect valve 207. From left to right, fuel collection chambers 1 to 10 are equipped with 10 inlet switches. Figure 2 The fuel collection chamber inlet switch 204 is an example) and 10 outlet switches ( Figure 2 The fuel sampling chamber outlet switch 213 is an example, and the fuel sampling system controller 205 ( Figure 2 The FCU in the middle controls the opening and closing of the inlet switch through the inlet switch integrated circuit and the opening and closing of the outlet switch through the outlet switch integrated circuit. The return oil pipeline switch regulating valve 211 and the drain plug 212 need to be opened and closed manually.

[0035] The fuel sampling system controller communicates with the intelligent connected platform via a wireless network to obtain vehicle refueling information and gas station details. Simultaneously, the controller connects to the GPS signal and instrument panel via a bus. In the event of a communication failure between the controller and the intelligent connected platform, the controller determines whether the vehicle has refueled based on fuel level information and stores gas station location information via GPS signal. During fuel sampling, the instrument panel displays the gas station name and location information corresponding to the sampling chamber. The fuel sampling system controller integrates a sampling switch, which issues sampling commands. Alternatively, the sampling switch can be wired out and fixed to an easily accessible location, or integrated into the instrument panel interface, transmitting sampling commands to the fuel sampling system via a bus. Alternatively, the GPS signal can be integrated into the controller. Alternatively, the controller can be integrated into the engine ECU. Alternatively, the manually operated regulating valve on the return fuel line can be replaced with an electronically controlled regulating valve.

[0036] like Figure 4 As shown, one embodiment of the fuel sampling method of the vehicle fuel collection system of the present invention is as follows:

[0037] After the automatic fuel sampling controller is powered on, assuming normal communication between the controller and the intelligent network platform, the intelligent network platform determines the refueling sign and gas station name, such as... Figure 3 As shown, specifically, the intelligent connected platform records and stores the vehicle's fuel level and GPS location information in real time. After the vehicle is powered on, the intelligent connected platform automatically compares the current fuel level with the fuel level before power-off. If the current fuel level is greater than the previous fuel level (a liters), the platform identifies that the vehicle is refueling, sets the refueling flag to 1, and obtains the gas station name by comparing the current GPS information with map big data information. The refueling flag 1 and the gas station name are then sent to the controller via wireless communication. If the current fuel level is not greater than the previous fuel level (a liters), the platform identifies that the vehicle is not refueling, and sends the refueling flag (0) to the FCU controller via wireless communication. The controller determines whether the refueling flag sent by the intelligent connected platform is 1. If the refueling flag is 1, the process proceeds to the next sampling step; otherwise, it determines that the vehicle is not refueling and the process ends.

[0038] Because residual fuel remains in the return line after refueling, the engine needs to be started and run for more than t1 minutes before the sampling process begins. Once sampling begins, the previously stored sampling identifier b is checked for 0 or 10. If b is 0, sampling starts from sampling chamber 1. If b is neither 0 nor 10, sampling starts from sampling chamber b+1. The corresponding sampling chamber inlet switch is opened, and the gas station name and GPS signal sent by the intelligent network platform are stored as the location b+1. At this time, fuel from the return line enters the corresponding sampling chamber through the quick-connect valve connected to the engine. The sampling chamber inlet switch needs to remain open for t2 minutes to ensure sufficient fuel samples are collected. After t2 minutes, the inlet switch of the corresponding sampling chamber is closed.

[0039] If the sampling identifier is 10, then it is determined whether the cyclic sampling identifier B is also 10. If the cyclic sampling identifier B is also 10, sampling starts from sampling chamber 1. If the cyclic sampling identifier B is not 10, sampling starts from sampling chamber B+1. At the same time, the inlet and outlet switches of the corresponding sampling chamber are turned on, and the gas station name and GPS signal sent by the intelligent network platform are stored as the location marked B+1. At this time, the fuel in the return oil circuit enters the corresponding sampling chamber through the return oil circuit quick-connect valve connected to the engine. The fuel sample in the original sampling chamber enters the fuel tank through the outlet switch and the return oil line. The inlet and outlet switches of the sampling chamber need to be kept open for t2 minutes to ensure that there is no original fuel sample in the sampling chamber. After t2 minutes, the outlet switch of the corresponding sampling chamber is turned off first, and then the inlet switch is turned off to ensure that the sampling chamber samples enough fuel.

[0040] After the sampling process is completed, the sampling identifier is stored as the current sampling chamber number, and the current fuel quantity in the fuel tank is stored each time the power is turned off.

[0041] If all sampling chambers are full and no sampling has been performed, then sampling will begin cyclically from sampling chamber 1, meaning only fuel samples from the last 10 refueling sessions before sampling will be retained.

[0042] like Figure 5 As shown, another embodiment of the fuel sampling method of the vehicle fuel collection system of the present invention is as follows:

[0043] After the automatic fuel sampling controller is powered on, assuming normal communication between the controller and the intelligent network platform, the intelligent network platform determines the refueling sign and gas station name, such as... Figure 3As shown, specifically, the intelligent connected platform records and stores the vehicle's fuel level and GPS location information in real time. After the vehicle is powered on, the intelligent connected platform automatically compares the current fuel level with the fuel level before power-off. If the current fuel level is greater than the previous fuel level (a liters), the platform identifies that the vehicle is refueling, sets the refueling flag to 1, and obtains the gas station name by comparing the current GPS information with map big data information. The refueling flag 1 and the gas station name are then sent to the controller via wireless communication. If the current fuel level is not greater than the previous fuel level (a liters), the platform identifies that the vehicle is not refueling, and sends the refueling flag (0) to the FCU controller via wireless communication. The controller determines whether the refueling flag sent by the intelligent connected platform is 1. If the refueling flag is 1, the process proceeds to the next sampling step; otherwise, it determines that the vehicle is not refueling and the process ends.

[0044] First, determine if the sampling identifier is 0. If the sampling identifier is not 0, proceed to the next step. If the sampling identifier b is 0, proceed directly to the sampling process, starting from sampling chamber 1. Since there will be residual fuel in the return line after refueling, the engine needs to be started and run for more than t1 minutes before the inlet switch of sampling chamber 1 is opened. The gas station name and GPS signal sent by the intelligent network platform are stored as location 1. At this time, the fuel in the return line enters the corresponding sampling chamber through the quick-connect valve of the return line connected to the engine. The inlet switch of the sampling chamber needs to be kept open for t2 minutes to ensure that the sampling chamber samples enough fuel. After t2 minutes, the inlet switch of the corresponding sampling chamber is closed.

[0045] When the sampling identifier is not 0, the information of the gas station where the current refueling is performed is compared with the information of the gas stations where the current refueling is performed. If the information of the gas station where the current refueling is performed is not in the information of the gas stations sampled in the past, the next step of the sampling process is performed. If the information of the gas station where the current refueling is performed is already included in the information of the gas stations sampled in the past, the judgment ends and the sampling process is not performed. This judgment can enable more effective gas station samples to be collected from the limited sampling chamber.

[0046] After the sampling process is executed, it is determined whether the sampling identifier is 10. If the sampling identifier is 10, the next step is determined. If the sampling identifier is not 10, sampling starts from the b+1 sampling chamber, the corresponding sampling chamber inlet switch is opened, and the gas station name and GPS signal sent by the intelligent network platform are stored as the location marked b+1. At this time, the return fuel enters the corresponding sampling chamber through the return fuel quick-connect valve connected to the engine. The sampling chamber inlet switch needs to be kept open for t2 minutes to ensure that the sampling chamber samples enough fuel. After t2 minutes, the inlet switch of the corresponding sampling chamber is closed.

[0047] If the sampling identifier is 10, then it is determined whether the cyclic sampling identifier B is also 10. If the cyclic sampling identifier B is also 10, sampling starts from sampling chamber 1. If the cyclic sampling identifier B is not 10, sampling starts from sampling chamber B+1. At the same time, the inlet and outlet switches of the corresponding sampling chamber are turned on, and the gas station name and GPS signal sent by the intelligent network platform are stored as the location marked B+1. At this time, the fuel in the return oil circuit enters the corresponding sampling chamber through the return oil circuit quick-connect valve connected to the engine. The fuel sample in the original sampling chamber enters the fuel tank through the outlet switch and the return oil line. The inlet and outlet switches of the sampling chamber need to be kept open for t2 minutes to ensure that there is no original fuel sample in the sampling chamber. After t2 minutes, the outlet switch of the corresponding sampling chamber is turned off first, and then the inlet switch is turned off to ensure that the sampling chamber samples enough fuel.

[0048] After the sampling process is completed, the sampling identifier is stored as the current sampling chamber number, and the current fuel quantity in the fuel tank is stored each time the power is turned off.

[0049] If all sampling chambers are full and no sampling has been performed, then sampling will begin cyclically from sampling chamber 1, meaning only fuel samples from the last 10 refueling sessions before sampling will be retained.

[0050] like Figure 6 As shown, the fuel sampling method of the vehicle fuel collection system of the present invention is as follows:

[0051] After the automatic fuel sampling controller is powered on, it assigns the sampling identifier b to the sampling identifier c. If the sampling switch is pressed, it is considered that there is a sampling requirement, and the sampling control process begins; otherwise, the next step is not executed. Before pressing the sampling switch to start sampling, the return fuel circuit switch regulating valve must be manually closed, and the vent plug must be opened to drain any residual fuel. Only after the residual fuel has been drained and sampling preparation is complete can the sampling switch be pressed to start sampling.

[0052] After pressing the sampling switch, it is determined whether the sampling identifier c is 0. If the sampling identifier is not 0, the sampling process is executed and sampling starts from the acquisition cavity c. If the sampling identifier is 0, it is determined that no sampling has been performed before sampling, and the sampling process ends.

[0053] When sampling begins in sampling chamber c, the outlet switch of sampling chamber c is opened. Fuel in sampling chamber c flows through the drain plug into the prepared sampler. At the same time, the instrument displays the GPS location information of the fuel being added in that sampling chamber. The outlet switch of sampling chamber c needs to be kept open for t3 minutes to ensure that the fuel sample in the sampling chamber is completely collected. After t3 minutes, the outlet switch of sampling chamber c is closed.

[0054] After sampling is completed in acquisition cavity c, it is determined whether c is 1. If c is 1, the GPS location information of all acquisition cavities is cleared when power is turned off. If c is not 1, c = c - 1 is executed and the judgment of the sampling command is returned to prepare for the next sampling cycle.

[0055] Sampling begins from the highest sampling chamber and continues until sampling is completed in sampling chamber 1, at which point the sampling process ends.

[0056] In this embodiment, 'a' represents the change in fuel quantity during refueling, with a value of 20L; 'b' is the sampling identifier, with a value between 0 and 10; 'c' is the sampling identifier, with a value between 0 and 10; 'd' is the cyclic sampling identifier, with a value between 0 and 10; 't1' is the time required for the engine to run before sampling, with a value of 5 minutes; and 't2' is the time for the sampling chamber to open, with a value of 1 minute.

[0057] This invention is designed for vehicles powered by liquid fuel engines. Based on the existing fuel circulation system, an automatic fuel sampling system is connected to the return fuel line. When the controller and the network platform are communicating normally, if the refueling indicator equals the refueling set value, sampling begins sequentially from the collection chamber according to the sampling indicator, and the corresponding inlet switch is opened. After sampling, the inlet switch of the collection chamber is closed, and the sampling indicator is stored as the collection chamber number and the fuel quantity at power-off. The sampling indicator is then assigned to the sampling identifier. If the sampling identifier does not equal the set value, the outlet switch of the collection chamber is opened sequentially to sample the collection chamber. By connecting the designed automatic fuel sampling system to the return fuel line and combining sampling and sampling control methods, automatic collection, convenient sampling, and fuel tracking of vehicle fuel samples are achieved, providing a key technical solution for realizing closed-loop fuel quality control.

[0058] Specific implementation methods have been given above, but the present invention is not limited to the described implementation methods. The basic idea of ​​the present invention lies in the above basic scheme. For those skilled in the art, designing various modified models, formulas, and parameters based on the teachings of the present invention does not require creative effort. Changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A vehicle fuel collection system, characterized in that, The vehicle fuel sampling system includes a fuel sampling pipeline, a controller, a sampler, N sampling chambers, and a fuel sampling system return pipeline. The inlet of the fuel sampling pipeline is used to connect to the engine return outlet pipeline, and the outlet of the fuel sampling pipeline is used to connect to the fuel tank inlet pipeline. The controller controls the inlet and outlet switches connected to each collection chamber. When the inlet switch is open, fuel in the fuel collection pipeline enters the corresponding collection chamber. When the outlet switch is open, fuel in the collection chamber enters the fuel tank or enters the sampler for storage through the return oil pipeline. After a vehicle is identified as refueling, the name of the gas station is obtained by comparing the current GPS information with map big data information. Judge the previously stored sampling identifier b: If b is 0, sampling starts from sampling chamber 1, the inlet switch of sampling chamber 1 is turned on and held for time t2, then the inlet switch of sampling chamber 1 is turned off and b is stored as 1; If b is non-zero, check if the gas station information in this test is the same as the previously sampled gas station information. If they are the same, the process ends; otherwise, check if b is N. If b is not N, sampling starts from sampling cavity b+1, the inlet switch of the corresponding sampling cavity is turned on and held for time t2, then the inlet switch of the sampling cavity is turned off and b is stored as the sampling cavity number. If b is N, then determine whether the cyclic sampling identifier B is N. If B is N, then start sampling from sampling chamber 1. If B is not N, then start sampling from sampling chamber B+1. At the same time, open the inlet switch and outlet switch of the corresponding sampling chamber and keep it open for time t2 so that the fuel sample in the original sampling chamber enters the fuel tank through the outlet switch and return oil line. Then, first close the outlet switch of the sampling chamber and then close the inlet switch and store B as the sampling chamber number.

2. The vehicle fuel collection system according to claim 1, characterized in that, Once b is identified as 0, the inlet switch of the No. 1 acquisition chamber will be opened only after the engine has started and run for more than t1 time.

3. The vehicle fuel collection system according to claim 1, characterized in that, After the inlet switch of the collection chamber is closed, the amount of oil at the time of power-off is also stored.

4. The vehicle fuel collection system according to claim 1, characterized in that, If the current fuel level is greater than the fuel level 'a' liters before the power was turned off, the vehicle is considered to have been refueled; otherwise, the vehicle is considered not to have been refueled.

5. The vehicle fuel collection system according to claim 1, characterized in that, The vehicle fuel sampling system uses the following fuel sampling method to sample vehicle fuel: assign a sampling identifier to the sampling identifier, and sample the fuel in each sampling chamber according to the set sampling order and sampling identifier.

6. The vehicle fuel collection system according to claim 5, characterized in that, When the outlet switch of the sampling chamber is opened to take samples, the name and location information of the corresponding oil station are displayed on the instrument.

7. The vehicle fuel collection system according to claim 4, characterized in that, When the inlet switch of the corresponding collection chamber is turned on, the name and location information of the gas station where the vehicle was refueled will also be stored in the location corresponding to the serial number of the collection chamber.

8. The vehicle fuel collection system according to claim 1, characterized in that, The fuel collection line inlet is connected to the engine return fuel outlet line via a quick-connect valve, and the fuel collection line outlet is connected to the fuel tank inlet line via a quick-connect valve.

9. The vehicle fuel collection system according to claim 5, characterized in that, At the end of the sampling process, clear the gas station name and location information of all collection chambers.

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