Vehicle fuel leakage detection method, device, system and equipment and vehicle

Abstract

The invention provides a vehicle fuel leakage detection method, device, system and equipment and a vehicle. In the method, when an ECU (Electronic Control Unit) monitors that a preset leakage detection condition is met during the driving of a vehicle, travel route traffic information of the travel is obtained; determining whether a preset detection duration condition is established or not according to the travel route traffic information; and if it is determined that the preset detection duration condition is met, fuel leakage detection is conducted through a fuel tank stop valve, a pressure sensor, a carbon tank desorption valve, a carbon tank stop valve and an engine. According to the scheme, in the vehicle driving process, fuel oil leakage detection is achieved according to the travel route traffic information, vehicle power-off and manual detection are not needed, and the detection efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method, apparatus, system, equipment, and vehicle for detecting vehicle fuel leaks. Background Technology

[0002] With the continuous development of technology, vehicle types are becoming increasingly diverse, among which hybrid vehicles and range-extended vehicles have attracted attention due to their lower operating costs. Hybrid and range-extended vehicles contain a fuel vaporization system, in which a carbon canister is installed between the engine and the fuel tank. The engine, carbon canister, and fuel tank are connected sequentially via piping. To ensure vehicle safety, fuel leak detection is necessary to determine if there are any leaks in the fuel vaporization system.

[0003] In existing technologies, vehicle fuel leak detection is typically performed manually after the vehicle is powered off. Workers pressurize and then seal the fuel evaporation system, then assess the pressure changes to determine if a leak has occurred.

[0004] In summary, existing methods for detecting vehicle fuel leaks require manual inspection after the vehicle is powered off, resulting in low detection efficiency. Summary of the Invention

[0005] The vehicle fuel leak detection method, apparatus, system, equipment, and vehicle provided in this application are intended to solve the problem that existing vehicle fuel leak detection methods require manual detection after the vehicle is powered off, resulting in low detection efficiency.

[0006] In a first aspect, embodiments of this application provide a method for detecting fuel leaks in a vehicle, applied to an electronic control unit (ECU), the method comprising:

[0007] When the preset leakage detection conditions are met during vehicle operation, the travel route and traffic information for this trip are obtained;

[0008] Based on the traffic information of the travel route, determine whether the preset detection duration condition is met;

[0009] If the preset detection duration condition is determined to be met, fuel leakage detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0010] The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

[0011] In one possible implementation, the ECU is electrically connected to the fuel tank shut-off valve, the pressure sensor, the carbon canister desorption valve, the carbon canister shut-off valve, and the engine, respectively.

[0012] The fuel leak detection process, which utilizes the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine, includes:

[0013] The system controls the opening of the fuel tank shut-off valve, the opening of the carbon canister desorption valve, the closing of the carbon canister shut-off valve, and the operation of the engine, while monitoring real-time pressure through the pressure sensor.

[0014] When the real-time pressure is detected to reach the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

[0015] When the vehicle speed is detected to be 0 for a preset period of time, the pressure to be detected is obtained through the pressure sensor.

[0016] Based on the pressure to be detected and the preset pressure threshold, it is determined whether a leak has occurred in the fuel evaporation system, wherein the preset pressure threshold is greater than or equal to the preset target pressure.

[0017] In one possible implementation, determining whether a leak has occurred in the fuel evaporation system based on the pressure to be detected and a preset pressure threshold includes:

[0018] If the pressure to be detected is greater than the preset pressure threshold, it is determined that a leak has occurred in the fuel evaporation system;

[0019] If the pressure to be detected is less than or equal to the preset pressure threshold, it is determined that there is no leak in the fuel evaporation system.

[0020] In one possible implementation, the preset leak detection conditions include:

[0021] During this trip, the engine's cumulative operating time is greater than or equal to the preset operating time threshold, the current ambient temperature is within the preset ambient temperature range, the current fuel tank level is within the preset height range, and the atmospheric pressure at the vehicle's location is less than the preset pressure threshold.

[0022] In one possible implementation, the travel route traffic information includes the vehicle's speed, vehicle acceleration, length of the target road segment, speed limit of the target road segment, congestion level of the target road segment, vehicle speed of the target road segment, number of vehicles in the target road segment, and switching time of the target traffic light; the target road segment is the section of the travel route from the vehicle's current position to the target traffic light, and the target traffic light is the first traffic light that the vehicle passes through from its current position on the travel route;

[0023] The step of determining whether the preset detection duration condition is met based on the travel route traffic information includes:

[0024] The vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, and traffic congestion level of the target road segment are input into the first preset duration prediction model to obtain the vehicle travel time, which is the time it takes for the vehicle to travel from its current location to the target traffic light.

[0025] The vehicle speed, the number of vehicles in the target road segment, and the switching time of the target traffic light are input into the second preset time prediction model to obtain the vehicle waiting time, which is the duration during which the vehicle remains stationary at the target traffic light.

[0026] Based on the vehicle's travel time and waiting time, determine whether the preset detection time condition is met.

[0027] In one possible implementation, the preset detection duration condition includes:

[0028] The vehicle's driving time exceeds the preset vacuuming time, and the vehicle's waiting time exceeds the preset vehicle stabilization time.

[0029] In one possible implementation, before controlling the carbon canister desorption valve to close and controlling the engine to stop operating when the monitored real-time pressure reaches the preset target pressure, the method further includes:

[0030] Monitor whether the real-time pressure reaches the preset target pressure within the preset vacuuming time;

[0031] If the real-time pressure does not reach the preset target pressure within the preset vacuuming time, it is determined that there is a leak in the fuel evaporation system.

[0032] When the monitored real-time pressure reaches the preset target pressure, controlling the carbon canister desorption valve to close and controlling the engine to stop working includes:

[0033] If the real-time pressure reaches the preset target pressure within the preset vacuuming time, then when the real-time pressure reaches the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

[0034] Secondly, embodiments of this application provide a vehicle fuel leak detection device, comprising:

[0035] The acquisition module is used to acquire the travel route traffic information for this trip when the preset leakage detection conditions are met during vehicle operation.

[0036] The processing module is used to determine whether the preset detection duration condition is met based on the travel route traffic information;

[0037] The detection module is used to detect fuel leakage through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve and engine if the preset detection duration condition is determined to be met.

[0038] The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

[0039] Thirdly, embodiments of this application provide an ECU, including:

[0040] Processor, memory, communication interface;

[0041] The memory is used to store the executable instructions of the processor;

[0042] The processor is configured to execute the vehicle fuel leak detection method according to any one of the first aspects by executing the executable instructions.

[0043] Fourthly, embodiments of this application provide a vehicle fuel leak detection system, comprising:

[0044] Fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and ECU;

[0045] The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

[0046] The ECU is electrically connected to the fuel tank shut-off valve, the pressure sensor, the carbon canister desorption valve, the carbon canister shut-off valve, and the engine, respectively.

[0047] The ECU is used to perform the vehicle fuel leak detection method described in any of the first aspects above.

[0048] Fifthly, embodiments of this application provide a vehicle including the vehicle fuel leak detection system described in the fourth aspect above;

[0049] The ECU in the vehicle fuel leak detection system is used to execute the vehicle fuel leak detection method described in any of the first aspects above.

[0050] In a sixth aspect, embodiments of this application provide a readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the vehicle fuel leak detection method described in any of the first aspects.

[0051] In a seventh aspect, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the vehicle fuel leak detection method described in any of the first aspects.

[0052] The vehicle fuel leak detection method, device, system, equipment, and vehicle provided in this application embodiment acquire the travel route traffic information when the preset leak detection conditions are met during vehicle operation via the ECU. Then, based on the travel route traffic information, it determines whether the preset detection duration condition is met. If the preset detection duration condition is met, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine. This solution improves detection efficiency by realizing fuel leak detection based on travel route traffic information during vehicle operation, without requiring vehicle shutdown or manual inspection. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0054] Figure 1 This is a schematic diagram of the fuel evaporation system provided in this application;

[0055] Figure 2 This is a schematic diagram of the vehicle fuel leak detection system provided in this application;

[0056] Figure 3 This is a flowchart illustrating an embodiment of the vehicle fuel leak detection method provided in this application;

[0057] Figure 4 This is a flowchart illustrating Embodiment 2 of the vehicle fuel leak detection method provided in this application;

[0058] Figure 5 A flowchart illustrating Embodiment 3 of the vehicle fuel leak detection method provided in this application;

[0059] Figure 6 A schematic diagram of the structure of an embodiment of the vehicle fuel leak detection device provided in this application;

[0060] Figure 7 This is a schematic diagram of the structure of an ECU provided in this application.

[0061] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0062] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0063] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] With the continuous development of technology, the types of vehicles are becoming increasingly diverse. Among them, hybrid vehicles and range-extended vehicles have attracted attention due to their lower operating costs. Hybrid and range-extended vehicles incorporate fuel evaporation systems to reduce fuel waste caused by fuel evaporation.

[0065] For example, Figure 1 A schematic diagram of the fuel evaporation system provided in this application is shown below. Figure 1 As shown, the fuel evaporation system includes a fuel tank, a fuel tank shut-off valve, a carbon canister, a carbon canister desorption valve, a connecting line between the carbon canister and the engine, and a connecting line between the fuel tank and the carbon canister. The fuel tank shut-off valve is installed in the connecting line between the fuel tank and the carbon canister, and the carbon canister desorption valve is installed in the connecting line between the carbon canister and the engine.

[0066] When the fuel tank pressure is high, the fuel tank shut-off valve opens, allowing fuel vapor to be adsorbed by the activated carbon in the carbon canister, thus reducing the fuel tank pressure. When the engine is not running, the carbon canister desorption valve closes to prevent fuel vapor from being wasted. When the engine is running, the carbon canister desorption valve opens, and the engine draws gas from the carbon canister, desorbing the fuel adsorbed on the activated carbon, which is then drawn into the engine for combustion.

[0067] To ensure vehicle safety, fuel leak detection is necessary to determine if there is a leak in the fuel evaporation system.

[0068] In existing technologies, vehicle fuel leak detection is typically performed manually after the vehicle is powered off. Workers pressurize and seal the fuel evaporation system, then check for pressure changes to determine if a leak has occurred. Because this manual inspection is performed after the vehicle is powered off, it results in low detection efficiency.

[0069] To address the problems existing in the prior art, the inventors, during their research on vehicle fuel leak detection methods, discovered that to improve detection efficiency, detection can be performed while the vehicle is in motion. After the vehicle meets the preset leak detection conditions, since the pressure obtained during fuel leak detection is the pressure after the vehicle has stabilized at rest, traffic information from the travel route can be used to determine whether the preset detection duration condition is met, thus determining whether there is sufficient time for the vehicle to remain stationary and for detection. If the preset detection duration condition is met, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine. The carbon canister shut-off valve is installed in the carbon canister's ventilation pipe, and the pressure sensor is installed in the fuel evaporation system. Based on the above inventive concept, the vehicle fuel leak detection scheme of this application was designed.

[0070] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0071] For example, Figure 2 This is a schematic diagram of the vehicle fuel leak detection system provided in this application, as shown below. Figure 2 As shown in the diagram, the dashed lines represent wiring harnesses, and the thicker solid lines represent pipelines. The vehicle fuel leak detection system includes a fuel tank shut-off valve 201, a pressure sensor 202, a carbon canister desorption valve 203, a carbon canister shut-off valve 204, and an ECU 205.

[0072] Fuel tank shut-off valve 201 is installed in the connecting pipe between fuel tank 206 and carbon canister 207, carbon canister desorption valve 203 is installed in the connecting pipe between carbon canister 207 and engine 208, carbon canister shut-off valve 201 is installed in the ventilation pipe of carbon canister 207, and pressure sensor 202 is installed in the fuel evaporation system.

[0073] ECU205 is electrically connected to fuel tank shut-off valve 201, pressure sensor 202, carbon canister desorption valve 203, carbon canister shut-off valve 204 and engine 208 respectively.

[0074] It should be noted that the fuel tank shut-off valve 201, the carbon canister desorption valve 203, and the carbon canister shut-off valve 204 are valves that can be controlled to open and close by the ECU 205. They can be electric valves or solenoid valves. This application embodiment does not limit the types of fuel tank shut-off valves, carbon canister desorption valves, and carbon canister shut-off valves, and they can be determined according to the actual situation.

[0075] It should be noted that the pressure sensor 202 is installed in the fuel evaporation system. It can be installed in the pipeline between the fuel tank 206 and the fuel tank shut-off valve 201, the pipeline between the fuel tank shut-off valve 201 and the carbon canister 207, the pipeline between the carbon canister 207 and the carbon canister shut-off valve 204, the pipeline between the carbon canister 207 and the carbon canister desorption valve 203, or in the carbon canister 207 or the fuel tank 206. The pressure sensor 202 can also be combined with the fuel tank shut-off valve 201. There is at least one pressure sensor. This application does not limit the installation location and number of pressure sensors; these can be determined according to actual conditions.

[0076] Combination Figure 2 The following provides examples illustrating the application scenarios of the vehicle fuel leak detection method provided in this application.

[0077] For example, in this application scenario, after setting a travel route, the user travels according to that route.

[0078] The ECU monitors whether preset leak detection conditions are met while the vehicle is in motion. When the preset leak detection conditions are met, the ECU obtains the travel route and traffic information for this trip.

[0079] Then, based on the travel route and traffic information, determine whether the preset detection duration conditions are met;

[0080] If the preset detection time condition is met, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0081] When a fuel leak is detected, the ECU can send a fuel leak warning message to the on-board terminal so that the user can view the fuel leak warning message on the on-board terminal and have the vehicle inspected in a timely manner.

[0082] It should be noted that the above scenario is only an example of an application scenario provided by the embodiments of this application. The embodiments of this application do not limit the actual form of the various devices included in the scenario, nor do they limit the interaction method between devices. In the specific application of the solution, it can be set according to actual needs.

[0083] Below, in conjunction with Figure 2 The technical solutions of this application will be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0084] Figure 3 This is a flowchart illustrating a first embodiment of the vehicle fuel leak detection method provided in this application. This embodiment describes the situation where the ECU performs fuel leak detection during vehicle operation. The method in this embodiment can be implemented through software, hardware, or a combination of both. Figure 3 As shown, the vehicle fuel leak detection method specifically includes the following steps:

[0085] S301: When the preset leakage detection conditions are met during vehicle operation, obtain the travel route traffic information for this trip.

[0086] In this step, to improve the accuracy of fuel leak detection while the vehicle is in motion, the ECU needs to monitor whether preset leak detection conditions are met. When the ECU detects that the preset leak detection conditions are met while the vehicle is in motion, it needs to obtain traffic information about the travel route to determine whether there is sufficient time to perform fuel leak detection.

[0087] The preset leakage detection conditions include a first condition, a second condition, a third condition, and a fourth condition.

[0088] The first condition is: the cumulative working time of the engine during this trip is greater than or equal to the preset working time threshold.

[0089] The second condition is: the current ambient temperature is within the preset ambient temperature range.

[0090] The third condition is: the current liquid level in the tank is within the preset height range.

[0091] The fourth condition is: the atmospheric pressure at the vehicle's location is less than the preset pressure threshold.

[0092] The preset leak detection conditions being met means that all four conditions (first, second, third, and fourth) are met. The preset leak detection conditions not being met means that at least one of the four conditions is not met.

[0093] It should be noted that the preset working time threshold can be 600 seconds, 610 seconds, 650 seconds, 700 seconds, etc. The preset ambient temperature range can be 4-35℃, 7-32℃, 10-30℃, etc. The liquid level height can be expressed as a percentage, representing the percentage of the actual liquid level height to the actual tank height; the preset height range can be 15%-85%, 20%-80%, 23%-76%, etc. The preset pressure threshold can be 75kPa, 80kPa, 110kPa, etc. This application embodiment does not limit the preset working time threshold, preset ambient temperature range, preset height range, and preset pressure threshold; they can be determined according to actual conditions.

[0094] Setting preset leak detection conditions can eliminate interference from variables such as temperature, pressure, oil level, and carbon canister desorption, ensuring the accuracy of the detection results.

[0095] It should be noted that fuel leak detection will not be performed if the preset leak detection conditions are not met. Similarly, fuel leak detection will not be performed if travel route traffic information is unavailable or if the obtained travel route traffic information is incomplete.

[0096] S302: Determine whether the preset detection duration conditions are met based on travel route traffic information.

[0097] In this step, after the ECU obtains the travel route traffic information, in order to determine whether there is enough time to perform fuel leak detection, it needs to determine whether the preset detection duration condition is met based on the travel route traffic information.

[0098] Based on traffic information along the travel route, the vehicle's travel time and waiting time can be determined. The travel time is the time it takes for the vehicle to travel from its current location to the target traffic light, and the waiting time is the time the vehicle remains stationary at the target traffic light. The target traffic light is the first traffic light the vehicle passes along the travel route from its current location.

[0099] Then, based on the vehicle's driving time and waiting time, it is determined whether the preset detection time condition is met.

[0100] The preset detection duration conditions include a fifth condition and a sixth condition. The fifth condition is: the vehicle driving time is greater than the preset vacuuming time. The sixth condition is: the vehicle waiting time is greater than the preset vehicle stabilization time.

[0101] The preset detection duration condition is met when both the fifth and sixth conditions are met. The preset detection duration condition is not met when at least one of the fifth and sixth conditions is not met.

[0102] Fuel leak detection consists of two phases: the first phase involves vacuuming the sealed fuel evaporation system, and the second phase involves assessing the pressure within the sealed fuel evaporation system. In the second phase, the vehicle needs to remain stationary. Therefore, sufficient time is required to complete both the first and second phases before the vehicle reaches the target traffic light. Consequently, it's necessary to determine whether the vehicle's travel time exceeds the preset vacuuming time and whether the vehicle's waiting time exceeds the preset vehicle stabilization time.

[0103] It should be noted that the preset vacuuming time can be 30 seconds, 40 seconds, 50 seconds, etc., and the preset vehicle stabilization time can be 30 seconds, 40 seconds, 50 seconds, etc. This application embodiment does not limit the preset vacuuming time and the preset vehicle stabilization time, and they can be determined according to the actual situation.

[0104] In one implementation, when the ECU detects that a preset leak detection condition is met while the vehicle is in motion, it can send a detection request to the Digital Cockpit Head Unit (DHU). Upon receiving the request, the DHU obtains the traffic information for the current trip route, and then determines the detection duration based on this information, indicating whether the preset detection duration condition is met. The DHU then sends the detection duration result to the ECU, which can then determine whether the preset detection duration condition is met.

[0105] It should be noted that if the ECU determines that the preset detection time condition is not met, it means that there is not enough time to perform fuel leak detection, and therefore fuel leak detection will not be performed.

[0106] S303: If the preset detection time condition is determined to be met, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0107] In this step, if the ECU determines that the preset detection time condition is met, it means that there is enough time to detect fuel leaks. Then, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0108] Specifically, the system first controls the opening of the fuel tank shut-off valve, then controls the opening of the carbon canister desorption valve, then controls the closing of the carbon canister shut-off valve, then controls the engine operation, and monitors the real-time pressure using a pressure sensor.

[0109] By opening the fuel tank shut-off valve, opening the carbon canister desorption valve, and closing the carbon canister shut-off valve, the fuel evaporation system can be sealed off. When the engine is running, a vacuum can be drawn into the fuel evaporation system.

[0110] Furthermore, when the real-time pressure reaches the preset target pressure, the carbon canister desorption valve is closed, and the engine stops operating. This is to maintain the pressure within the fuel evaporation system.

[0111] It should be noted that when the carbon canister desorption valve is closed, the states of the oil tank shut-off valve and the carbon canister shut-off valve should remain unchanged.

[0112] It should be noted that the preset target pressure can be -4.7 kPa, -5 kPa, -5.5 kPa, etc. This application does not limit the preset target pressure, and it can be determined according to the actual situation.

[0113] When the ECU detects that the vehicle speed is 0 and the vehicle remains stable for a preset period of time, it obtains the pressure to be detected through the pressure sensor.

[0114] Because the vehicle needs to be in a stable state to ensure accuracy when detecting pressure, pressure is only acquired after the vehicle speed has been monitored at 0 for a preset period of time.

[0115] It should be noted that if the vehicle speed remains at 0 for the preset stable duration, fuel leak detection will not be performed.

[0116] The ECU then determines whether there is a leak in the fuel evaporation system based on the pressure to be detected and the preset pressure threshold.

[0117] If the pressure to be tested is greater than the preset pressure threshold, it indicates that there is a hole in the fuel evaporation system, and external gas enters the fuel evaporation system, confirming that there is a leak in the fuel evaporation system.

[0118] If the pressure to be tested is less than or equal to the preset pressure threshold, it indicates that there are no holes in the fuel evaporation system, external gas has not entered the fuel evaporation system, and it is determined that there is no leak in the fuel evaporation system.

[0119] It should be noted that the preset pressure threshold is greater than or equal to the preset target pressure. The preset pressure threshold can be -3.7 kPa, -4 kPa, -4.5 kPa, etc. This application does not limit the preset pressure threshold, which can be determined according to the actual situation.

[0120] After the ECU determines whether there is a leak in the fuel evaporation system, it can control the carbon canister desorption valve to open. When the pressure sensor detects that the pressure reaches the atmospheric pressure at the vehicle's location, it controls the fuel tank shut-off valve to close, ensuring vehicle safety while allowing the vehicle to drive normally.

[0121] It should be noted that when the carbon canister desorption valve is open, the states of the oil tank shut-off valve and the carbon canister shut-off valve remain unchanged. When the oil tank shut-off valve is closed, the states of the carbon canister desorption valve and the carbon canister shut-off valve remain unchanged.

[0122] It should be noted that after the ECU detects that the preset leak detection conditions are met, it can re-acquire traffic information about the travel route after each traffic light to determine whether the preset detection duration conditions are met. When the preset detection duration conditions are confirmed, fuel leak detection is performed via the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0123] Alternatively, after the ECU detects that the preset leak detection conditions are met, it can determine whether a fuel evaporation system leak has been detected each time the vehicle passes a traffic light. If no fuel evaporation system leak is detected, it can re-acquire traffic information for the current trip route to determine whether the preset detection duration condition is met. When the preset detection duration condition is met, fuel leak detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine.

[0124] The vehicle fuel leak detection method provided in this embodiment obtains the travel route traffic information when the ECU detects that a preset leak detection condition is met during vehicle operation. Based on this information, it determines whether a preset detection duration condition is met. If the condition is met, fuel leak detection is performed using the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine. This solution improves detection efficiency by detecting fuel leaks during vehicle operation based on travel route traffic information, eliminating the need for vehicle shutdown and manual inspection. Furthermore, utilizing existing valves and components in the vehicle reduces detection costs.

[0125] Figure 4 This is a flowchart illustrating a second embodiment of the vehicle fuel leak detection method provided in this application. Based on the above embodiments, this application's embodiment explains whether the ECU determines whether a preset detection duration condition is met based on travel route traffic information. For example... Figure 4 As shown, the vehicle fuel leak detection method specifically includes the following steps:

[0126] S401: Input the vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, and traffic congestion level of the target road segment into the first preset duration prediction model to obtain the vehicle's travel time.

[0127] In this step, the travel route traffic information includes the vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, congestion level of the target road segment, vehicle speed of the target road segment, number of vehicles in the target road segment, and traffic light switching time information.

[0128] The target road segment is the section of the route from the current location of the vehicle to the target traffic light, and the target traffic light is the first traffic light that the vehicle passes from its current location on the route.

[0129] After obtaining the traffic information of the travel route, the ECU inputs the vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, and traffic congestion level of the target road segment into the first preset duration prediction model to obtain the vehicle's travel time.

[0130] The first preset duration prediction model is a pre-trained neural network model that calculates vehicle travel time based on vehicle speed, acceleration, road segment length, speed limit, and vehicle congestion level.

[0131] In one implementation, the speed limit and congestion level of the target road segment are input into a first model to obtain the predicted vehicle speed. Then, the vehicle's speed, acceleration, the length of the target road segment, and the predicted speed are input into a second model to obtain the vehicle's travel time. The first model is a pre-trained neural network model that calculates the predicted vehicle speed based on the speed limit and congestion level. The second model is a pre-trained neural network model that calculates the vehicle's travel time based on the vehicle speed, acceleration, road segment length, and predicted speed.

[0132] S402: Input the vehicle speed, number of vehicles in the target road segment, and switching time of the target traffic light into the second preset duration prediction model to obtain the vehicle waiting time.

[0133] In this step, after the ECU obtains the traffic information of the travel route, it inputs the vehicle speed, the number of vehicles in the target road segment, and the switching time of the target traffic light into the second preset duration prediction model to obtain the vehicle waiting time.

[0134] The second preset duration prediction model is a pre-trained neural network model that calculates vehicle waiting time based on vehicle speed, number of vehicles, and traffic light switching time information.

[0135] It should be noted that the execution order of steps S401 and S402 can be: step S401 is executed first, then step S402. Alternatively, step S402 is executed first, then step S401. Or, steps S401 and S402 are executed simultaneously. This embodiment does not limit the execution order of steps S401 and S402; it can be determined according to the actual situation.

[0136] S403: Determine whether the preset detection time condition is met based on the vehicle's driving time and waiting time.

[0137] In this step, after the ECU obtains the vehicle driving time and vehicle waiting time, it determines whether the preset detection time condition is met based on the vehicle driving time and vehicle waiting time.

[0138] If the vehicle travel time exceeds the preset vacuuming time and the vehicle waiting time exceeds the preset vehicle stabilization time, then the preset detection time condition is determined to be met.

[0139] If the vehicle's driving time is less than or equal to the preset vacuuming time, or the vehicle's waiting time is less than or equal to the preset vehicle stabilization time, then the preset detection time condition is determined to be invalid.

[0140] The vehicle fuel leak detection method provided in this embodiment can improve the accuracy of judgment by using travel route traffic information to determine whether the preset detection time condition is met, thereby improving the accuracy of fuel leak detection.

[0141] Figure 5 This is a flowchart illustrating Embodiment 3 of the vehicle fuel leak detection method provided in this application. Based on the above embodiments, this embodiment further explains how, after the ECU controls the opening of the fuel tank shut-off valve, the opening of the carbon canister desorption valve, and the closing of the carbon canister shut-off valve, and controls the engine operation, and monitors the real-time pressure using a pressure sensor, it determines whether a leak has occurred in the fuel evaporation system based on whether the real-time pressure reaches a preset target pressure within a preset vacuuming time. Figure 5 As shown, the vehicle fuel leak detection method specifically includes the following steps:

[0142] S501: Monitor whether the real-time pressure reaches the preset target pressure within the preset vacuuming time; if the real-time pressure does not reach the preset target pressure within the preset vacuuming time, proceed to step S502; if the real-time pressure reaches the preset target pressure within the preset vacuuming time, proceed to step S503.

[0143] In this step, the ECU controls the opening of the fuel tank shut-off valve, the opening of the carbon canister desorption valve, and the closing of the carbon canister shut-off valve. After controlling the engine to work and monitoring the real-time pressure through the pressure sensor, if the holes in the fuel evaporation system are large, the pressure in the fuel evaporation system may not reach the preset target pressure. Therefore, it is necessary to monitor whether the real-time pressure reaches the preset target pressure within the preset vacuuming time.

[0144] S502: A leak has been detected in the fuel vaporization system.

[0145] If the ECU does not reach the preset target pressure within the preset vacuuming time in this step, it indicates that there are large holes in the fuel evaporation system, confirming that there is a leak in the fuel evaporation system.

[0146] S503: When the real-time pressure is detected to reach the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

[0147] In this step, if the ECU detects that the real-time pressure reaches the preset target pressure within the preset vacuuming time, in order to continue to detect whether there is a leak in the fuel evaporation system, when the real-time pressure reaches the preset target pressure, it controls the carbon canister desorption valve to close and controls the engine to stop working.

[0148] The vehicle fuel leak detection method provided in this embodiment improves the accuracy of fuel leak detection by determining that a leak has occurred in the fuel evaporation system when the real-time pressure does not reach the preset target pressure within a preset vacuuming time.

[0149] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0150] Figure 6 This is a schematic diagram of an embodiment of the vehicle fuel leak detection device provided in this application; the device can be integrated into the ECU in the above method embodiment, or it can be implemented through the ECU in the above method embodiment. Figure 6 As shown, the vehicle fuel leak detection device 60 includes:

[0151] The acquisition module 61 is used to acquire the travel route traffic information for this trip when the preset leakage detection conditions are met during vehicle operation.

[0152] Processing module 62 is used to determine whether the preset detection duration condition is met based on the travel route traffic information;

[0153] The detection module 63 is used to detect fuel leakage through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve and engine if the preset detection duration condition is determined to be met.

[0154] The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

[0155] Furthermore, the ECU is electrically connected to the fuel tank shut-off valve, the pressure sensor, the carbon canister desorption valve, the carbon canister shut-off valve, and the engine, respectively; the detection module 63 is specifically used for:

[0156] The system controls the opening of the fuel tank shut-off valve, the opening of the carbon canister desorption valve, the closing of the carbon canister shut-off valve, and the operation of the engine, while monitoring real-time pressure through the pressure sensor.

[0157] When the real-time pressure is detected to reach the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

[0158] When the vehicle speed is detected to be 0 for a preset period of time, the pressure to be detected is obtained through the pressure sensor.

[0159] Based on the pressure to be detected and the preset pressure threshold, it is determined whether a leak has occurred in the fuel evaporation system, wherein the preset pressure threshold is greater than or equal to the preset target pressure.

[0160] Furthermore, the detection module 63 is specifically used for:

[0161] If the pressure to be detected is greater than the preset pressure threshold, it is determined that a leak has occurred in the fuel evaporation system;

[0162] If the pressure to be detected is less than or equal to the preset pressure threshold, it is determined that there is no leak in the fuel evaporation system.

[0163] Furthermore, the preset leakage detection conditions include:

[0164] During this trip, the engine's cumulative operating time is greater than or equal to the preset operating time threshold, the current ambient temperature is within the preset ambient temperature range, the current fuel tank level is within the preset height range, and the atmospheric pressure at the vehicle's location is less than the preset pressure threshold.

[0165] Furthermore, the travel route traffic information includes the vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, congestion level of the target road segment, vehicle speed of the target road segment, number of vehicles in the target road segment, and switching time of the target traffic light; the target road segment is the section of the travel route from the vehicle's current position to the target traffic light, and the target traffic light is the first traffic light that the vehicle passes through from its current position on the travel route;

[0166] The processing module 62 is specifically used for:

[0167] The vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, and traffic congestion level of the target road segment are input into the first preset duration prediction model to obtain the vehicle travel time, which is the time it takes for the vehicle to travel from its current location to the target traffic light.

[0168] The vehicle speed, the number of vehicles in the target road segment, and the switching time of the target traffic light are input into the second preset time prediction model to obtain the vehicle waiting time, which is the duration during which the vehicle remains stationary at the target traffic light.

[0169] Based on the vehicle's travel time and waiting time, determine whether the preset detection time condition is met.

[0170] Furthermore, the preset detection duration conditions include:

[0171] The vehicle's driving time exceeds the preset vacuuming time, and the vehicle's waiting time exceeds the preset vehicle stabilization time.

[0172] Furthermore, before controlling the carbon canister desorption valve to close and the engine to stop operating when the real-time pressure is detected to reach the preset target pressure, the detection module 63 is also used for:

[0173] Monitor whether the real-time pressure reaches the preset target pressure within the preset vacuuming time;

[0174] If the real-time pressure does not reach the preset target pressure within the preset vacuuming time, it is determined that there is a leak in the fuel evaporation system.

[0175] The detection module 63 is further used for:

[0176] If the real-time pressure reaches the preset target pressure within the preset vacuuming time, then when the real-time pressure reaches the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

[0177] The vehicle fuel leak detection device provided in this embodiment is used to execute the technical solution in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0178] Figure 7 This is a schematic diagram of the structure of an ECU provided in this application. Figure 7 As shown, the ECU 70 includes:

[0179] Processor 71, memory 72, and communication interface 73;

[0180] The memory 72 is used to store the executable instructions of the processor 71;

[0181] The processor 71 is configured to execute the technical solution of the ECU in any of the foregoing method embodiments by executing the executable instructions.

[0182] Optionally, the memory 72 can be either standalone or integrated with the processor 71.

[0183] Optionally, when the memory 72 is a device independent of the processor 71, the ECU 70 may further include:

[0184] Bus 74, memory 72 and communication interface 73 are connected to processor 71 through bus 74 and complete communication with each other. Communication interface 73 is used to communicate with other devices.

[0185] Optionally, the communication interface 73 can be implemented using a transceiver. The communication interface is used to enable communication between the database access device and other devices (e.g., clients, read-write databases, and read-only databases). The memory may include random access memory (RAM) and may also include non-volatile memory, such as at least one disk drive.

[0186] Bus 74 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0187] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0188] The ECU is used to execute the technical solution of the ECU in any of the aforementioned method embodiments. Its implementation principle and technical effect are similar, and will not be repeated here.

[0189] This application also provides a vehicle fuel leak detection system, including:

[0190] Fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and ECU;

[0191] The fuel tank shut-off valve is installed in the connecting pipe between the fuel tank and the carbon canister; the carbon canister desorption valve is installed in the connecting pipe between the carbon canister and the engine; the carbon canister shut-off valve is installed in the vent pipe of the carbon canister; and the pressure sensor is installed in the fuel evaporation system.

[0192] The ECU is electrically connected to the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine, respectively.

[0193] The ECU is used to execute the technical solution of the ECU in any of the aforementioned method embodiments. Its implementation principle and technical effect are similar, and will not be repeated here.

[0194] This application embodiment also provides a vehicle, including the vehicle fuel leak detection system in the above-described vehicle fuel leak detection system embodiment;

[0195] The ECU in the vehicle fuel leak detection system is used to execute the vehicle fuel leak detection method in the above method embodiments.

[0196] The ECU in this application embodiment is used to execute the technical solution of the ECU in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be repeated here.

[0197] This application also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the technical solutions provided in any of the foregoing method embodiments.

[0198] This application also provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the technical solutions provided in any of the foregoing method embodiments.

[0199] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0200] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for detecting vehicle fuel leaks, characterized in that, Applied to an electronic control unit (ECU), the method includes: When the preset leakage detection conditions are met during vehicle operation, the travel route and traffic information for this trip are obtained; Based on the traffic information of the travel route, determine whether the preset detection duration condition is met; If the preset detection duration condition is determined to be met, fuel leakage detection is performed through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine. The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

2. The method according to claim 1, characterized in that, The ECU is electrically connected to the fuel tank shut-off valve, the pressure sensor, the carbon canister desorption valve, the carbon canister shut-off valve, and the engine, respectively. The fuel leak detection process, which utilizes the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and engine, includes: The system controls the opening of the fuel tank shut-off valve, the opening of the carbon canister desorption valve, the closing of the carbon canister shut-off valve, and the operation of the engine, while monitoring real-time pressure through the pressure sensor. When the real-time pressure is detected to reach the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped. When the vehicle speed is detected to be 0 for a preset period of time, the pressure to be detected is obtained through the pressure sensor. Based on the pressure to be detected and the preset pressure threshold, it is determined whether a leak has occurred in the fuel evaporation system, wherein the preset pressure threshold is greater than or equal to the preset target pressure.

3. The method according to claim 2, characterized in that, The step of determining whether a leak has occurred in the fuel evaporation system based on the pressure to be detected and a preset pressure threshold includes: If the pressure to be detected is greater than the preset pressure threshold, it is determined that a leak has occurred in the fuel evaporation system; If the pressure to be detected is less than or equal to the preset pressure threshold, it is determined that there is no leak in the fuel evaporation system.

4. The method according to any one of claims 1 to 3, characterized in that, The preset leakage detection conditions include: During this trip, the engine's cumulative operating time is greater than or equal to the preset operating time threshold, the current ambient temperature is within the preset ambient temperature range, the current fuel tank level is within the preset height range, and the atmospheric pressure at the vehicle's location is less than the preset pressure threshold.

5. The method according to any one of claims 1 to 3, characterized in that, The travel route traffic information includes the vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, congestion level of the target road segment, vehicle speed of the target road segment, number of vehicles in the target road segment, and switching time of the target traffic light. The target road segment is the section of the route from the current location of the vehicle to the target traffic light in this trip, and the target traffic light is the first traffic light that the vehicle passes through from the current location in the trip route; The step of determining whether the preset detection duration condition is met based on the travel route traffic information includes: The vehicle's speed, acceleration, length of the target road segment, speed limit of the target road segment, and traffic congestion level of the target road segment are input into the first preset duration prediction model to obtain the vehicle travel time, which is the time it takes for the vehicle to travel from its current location to the target traffic light. The vehicle speed, the number of vehicles in the target road segment, and the switching time of the target traffic light are input into the second preset time prediction model to obtain the vehicle waiting time, which is the duration during which the vehicle remains stationary at the target traffic light. Based on the vehicle's travel time and waiting time, determine whether the preset detection time condition is met.

6. The method according to claim 5, characterized in that, The preset detection duration conditions include: The vehicle's driving time exceeds the preset vacuuming time, and the vehicle's waiting time exceeds the preset vehicle stabilization time.

7. The method according to claim 2, characterized in that, Before controlling the carbon canister desorption valve to close and controlling the engine to stop working when the monitored real-time pressure reaches the preset target pressure, the method further includes: Monitor whether the real-time pressure reaches the preset target pressure within the preset vacuuming time; If the real-time pressure does not reach the preset target pressure within the preset vacuuming time, it is determined that there is a leak in the fuel evaporation system. When the monitored real-time pressure reaches the preset target pressure, controlling the carbon canister desorption valve to close and controlling the engine to stop working includes: If the real-time pressure reaches the preset target pressure within the preset vacuuming time, then when the real-time pressure reaches the preset target pressure, the carbon canister desorption valve is closed and the engine is stopped.

8. A vehicle fuel leak detection device, characterized in that, include: The acquisition module is used to acquire the travel route traffic information for this trip when the preset leakage detection conditions are met during vehicle operation. The processing module is used to determine whether the preset detection duration condition is met based on the travel route traffic information; The detection module is used to detect fuel leakage through the fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve and engine if the preset detection duration condition is determined to be met. The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system.

9. An ECU, characterized in that, include: Processor, memory, communication interface; The memory is used to store the executable instructions of the processor; The processor is configured to execute the vehicle fuel leak detection method according to any one of claims 1 to 7 by executing the executable instructions.

10. A vehicle fuel leak detection system, characterized in that, include: Fuel tank shut-off valve, pressure sensor, carbon canister desorption valve, carbon canister shut-off valve, and ECU; The fuel tank shut-off valve is installed in the connecting pipeline between the fuel tank and the carbon canister, the carbon canister desorption valve is installed in the connecting pipeline between the carbon canister and the engine, the carbon canister shut-off valve is installed in the ventilation pipe of the carbon canister, and the pressure sensor is installed in the fuel evaporation system. The ECU is electrically connected to the fuel tank shut-off valve, the pressure sensor, the carbon canister desorption valve, the carbon canister shut-off valve, and the engine, respectively. The ECU is used to perform the vehicle fuel leak detection method according to any one of claims 1 to 7.

11. A vehicle, characterized in that, Including the vehicle fuel leak detection system as described in claim 10; The ECU in the vehicle fuel leak detection system is used to execute the vehicle fuel leak detection method according to any one of claims 1 to 7.

12. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the vehicle fuel leak detection method according to any one of claims 1 to 7.

13. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, is used to implement the vehicle fuel leak detection method according to any one of claims 1 to 7.

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