Low-power-consumption high-pressure oil tank refueling control method, device and equipment and storage medium

Abstract

The invention discloses a low-power-consumption high-pressure fuel tank refueling control method, device and equipment and a storage medium, and relates to the technical field of automobile electronic control. Vehicle state information is obtained according to the hard wire signal, and whether the vehicle state information meets a refueling entering condition or not is judged; when the vehicle state information meets the refueling entering condition, an oil tank pressure relief valve is controlled to be opened for pressure relief, starting of an engine is forbidden, and a refueling timer is started to start timing; during the refueling mode operation period, the fuel tank pressure relief valve is continuously driven so that the fuel tank can be kept in the pressure relief state, the timing value of the refueling timer is continuously monitored, and vehicle operation information is obtained in real time; and when the timing value reaches a preset duration threshold value or the vehicle running information meets a forced quit condition, driving of the oil tank pressure release valve is stopped, the refueling mode is quitted, the controller is directly triggered to enter a low-power-consumption running state through a refueling switch hard wire signal, and the oil tank pressure release valve is continuously driven to achieve long-time safe refueling.

Description

Technical Field

[0001] This invention relates to the field of automotive electronic control technology, and in particular to a low-power, high-pressure fuel tank refueling control method, device, equipment, and storage medium. Background Technology

[0002] With the rapid expansion of the plug-in hybrid electric vehicle market, high-pressure fuel tank systems, as core components for suppressing fuel vapor emissions, have become industry standard. The market demand for convenient, safe, and long-term refueling control without depressurizing the vehicle is becoming increasingly urgent.

[0003] The existing technology has the following drawbacks: the entire vehicle must be depressurized before refueling, which makes the operation process cumbersome; the entire vehicle needs to be continuously awakened during the refueling process to keep the pressure relief valve open. In this mode, the low-voltage battery power consumption is too high and it is easy to cause power loss. If the refueling time is shortened manually, it will cause the nozzle to shut off, fuel to overflow, or even fire. Moreover, the refueling control involves the coordination of multiple controllers, which has complex logic and poor reliability, seriously restricting the user experience.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a low-power, high-pressure fuel tank refueling control method, device, equipment, and storage medium, aiming to solve the technical problem of how to achieve low-power, long-term safe refueling control without limiting the high-pressure state of the entire vehicle.

[0006] To achieve the above objectives, the present invention provides a low-power high-pressure fuel tank refueling control method, the low-power high-pressure fuel tank refueling control method comprising the following steps: Responds to a hardwired signal from the fuel filler switch; The vehicle status information is obtained based on the hard-wired signal, and it is determined whether the vehicle status information meets the refueling entry conditions. When the vehicle status information meets the refueling entry conditions, the fuel tank pressure relief valve is opened to release pressure, the engine is prevented from starting, and the refueling timer is started. During refueling mode operation, the fuel tank pressure relief valve is continuously driven to keep the fuel tank in a depressurized state, and the timing value of the refueling timer is continuously monitored and vehicle operation information is obtained in real time. When the timing value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions, the fuel tank pressure relief valve is stopped and the refueling mode is exited.

[0007] In one embodiment, the step of responding to a hardwired signal from the fuel filler switch includes: Check the hardwire connection status of the refueling switch; When the hardwire connection is in a normal connection state, the level value of the hardwire signal is collected; Determine whether the stated voltage level meets the valid voltage level condition; When the level value meets the valid level condition, the refueling request signal is confirmed to have been received.

[0008] In one embodiment, the step of obtaining vehicle status information based on the hard-wired signal and determining whether the vehicle status information meets the refueling entry conditions includes: The vehicle status information acquisition command is triggered based on the hard-wired signal; According to the vehicle status information collection command, vehicle speed information, gear information, and fuel tank system fault information are collected; Determine whether the vehicle speed information is less than a preset vehicle speed threshold, whether the gear information is in parking gear, and whether the fuel tank system fault information indicates no fault. When the vehicle speed information is less than a preset vehicle speed threshold, the gear information is in parking gear, and the fuel tank system fault information indicates no fault, it is determined that the refueling entry conditions are met.

[0009] In one embodiment, the step of controlling the fuel tank pressure relief valve to open and release pressure, preventing engine start, and starting the refueling timer when the vehicle status information meets the refueling entry conditions includes: Obtain the tank pressure value collected by the tank pressure sensor; Determine whether the oil tank pressure value is greater than a preset pressure threshold; When the oil tank pressure value is greater than the preset pressure threshold, a first drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve; When the oil tank pressure value is less than or equal to a preset pressure threshold, a second drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve. Send an engine start-prevention command and start the refueling timer.

[0010] In one embodiment, the step of continuously driving the fuel tank pressure relief valve to keep the fuel tank in a depressurized state during refueling mode operation, continuously monitoring the timing value of the refueling timer, and obtaining vehicle operation information in real time includes: When the vehicle enters a sleep state during refueling mode, the system enters a low-power operation state and maintains the output of the drive signal for the fuel tank pressure relief valve during this low-power operation state. Stop sending wake-up signals to other controllers, so that other controllers enter sleep mode; Continuously monitor the timing value of the refueling timer; It can acquire information on gear changes, throttle opening, and vehicle speed changes in real time.

[0011] In one embodiment, the step of entering a low-power operating state and maintaining the drive signal output of the oil tank pressure relief valve in the low-power operating state includes: Obtain low-power operation configuration parameters; Configure the main controller clock source as a low-power clock source according to the low-power operation configuration parameters; Configure the main controller power supply mode to hold mode according to the low-power operation configuration parameters; In the hold mode, the low-power clock source restricts other outputs of the main control to the outside world, while retaining the drive signal output to the oil tank pressure relief valve.

[0012] In one embodiment, the step of stopping the actuation of the fuel tank pressure relief valve and exiting the refueling mode when the timing value reaches a preset duration threshold or the vehicle operation information meets the forced exit condition includes: Determine whether the time value has reached a preset duration threshold; Determine whether the vehicle operation information meets the first forced exit condition. The first forced exit condition is that the gear is driving and the throttle opening exceeds a preset opening threshold. Determine whether the vehicle operation information meets the second forced exit condition, and determine that the second forced exit condition is that the vehicle speed exceeds a preset vehicle speed exit threshold; When the timing value reaches a preset duration threshold, or when the vehicle operation information meets the first forced exit condition, or when the vehicle operation information meets the second forced exit condition, the fuel tank pressure relief valve is stopped and the refueling mode is exited.

[0013] Furthermore, to achieve the above objectives, the present invention also proposes a low-power high-pressure fuel tank refueling control device, the device comprising: A signal receiving module for responding to hard-wired signals from the refueling switch; The mode determination module is used to obtain vehicle status information based on the hard-wired signal and determine whether the vehicle status information meets the refueling entry conditions. The refueling execution module is used to control the fuel tank pressure relief valve to open and release pressure, prevent the engine from starting, and start the refueling timer when the vehicle status information meets the refueling entry conditions. A low-power operation module is used to continuously drive the fuel tank pressure relief valve during refueling mode to keep the fuel tank in a depressurized state, continuously monitor the timing value of the refueling timer, and obtain vehicle operation information in real time. The exit control module is used to stop driving the fuel tank pressure relief valve and exit the refueling mode when the time value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions.

[0014] Furthermore, to achieve the above objectives, the present invention also proposes a low-power high-pressure fuel tank refueling control device, the device comprising: a memory, a processor, and a low-power high-pressure fuel tank refueling control program stored in the memory and executable on the processor, the low-power high-pressure fuel tank refueling control program being configured to implement the steps of the low-power high-pressure fuel tank refueling control method described above.

[0015] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a low-power high-pressure fuel tank refueling control program, wherein when the low-power high-pressure fuel tank refueling control program is executed by a processor, it implements the steps of the low-power high-pressure fuel tank refueling control method described above.

[0016] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the low-power high-pressure fuel tank refueling control method described above.

[0017] One or more technical solutions proposed in this application have at least the following technical effects: The controller independently manages the entire refueling process by directly triggering the refueling switch with a hard-wired signal. When the vehicle speed, gear position, and fuel tank are all within safe entry conditions, the pressure relief valve is opened and the engine is prevented from starting. During refueling mode operation, the controller maintains a low-power operation state, continuously driving the pressure relief valve while keeping other controllers in sleep mode. This reduces the vehicle's power consumption to the minimum required to maintain refueling, supports continuous refueling for extended periods to avoid the risk of nozzle tripping and fuel spillage, and automatically exits refueling mode when the timeout is exceeded or driving intention is detected. This achieves one-button triggering, long-term stable operation, and safe and intelligent exit of the refueling operation. Attached Figure Description

[0018] 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.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating an embodiment of the low-power high-pressure oil tank refueling control method of this application. Figure 2 This is a schematic diagram of high-pressure oil tank control provided in Embodiment 1 of the low-power high-pressure oil tank refueling control method of this application; Figure 3 This is a block diagram of the refueling control logic provided in Embodiment 1 of the low-power high-pressure fuel tank refueling control method of this application; Figure 4 This is a flowchart illustrating Embodiment 2 of the low-power high-pressure oil tank refueling control method of this application. Figure 5 This is a schematic diagram of the module structure of the low-power high-pressure oil tank refueling control device according to an embodiment of this application; Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the low-power high-pressure oil tank refueling control method in the embodiments of this application.

[0021] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0023] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0024] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a low-power high-pressure fuel tank refueling control device. The following description uses a low-power high-pressure fuel tank refueling control device as an example to illustrate this embodiment and the subsequent embodiments.

[0025] Based on this, the embodiments of this application provide a low-power high-pressure fuel tank refueling control method, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the low-power high-pressure fuel tank refueling control method of this application.

[0026] In this embodiment, the low-power high-pressure fuel tank refueling control method includes steps S10~S50: Step S10: Respond to the hard-wired signal from the refueling switch; like Figure 2The diagram shows the high-pressure fuel tank control. The refueling request switch is directly connected to the main refueling controller via a hardwire. The main controller is directly connected to the fuel tank pressure relief valve via a drive line and to the fuel tank pressure sensor via a sampling line. It also communicates with the engine controller, drive motor controller, gear controller, and vehicle speed sensor via the vehicle's private network. A 12V low-voltage battery powers the main refueling controller and other controllers. In low-power mode, the main controller independently maintains the drive of the pressure relief valve, while other controllers enter sleep mode.

[0027] like Figure 3 The diagram shows the refueling control logic block diagram. After the refueling switch triggers a hard-wired signal, the system sequentially checks whether the vehicle speed is less than or equal to 3 km / h, whether the gear is in parking mode, and whether there is a fault in the fuel tank system. When all three conditions are met, the system enters the refueling mode, controls the fuel tank pressure relief valve to open, prohibits engine starting, and starts timing. Subsequently, the main controller enters a low-power mode to maintain the pressure relief valve drive. When it detects that the gear has been switched to driving mode and the throttle opening exceeds the set value, or the vehicle speed exceeds 10 km / h, or the refueling duration exceeds 30 minutes, the system exits the refueling mode and stops driving the pressure relief valve.

[0028] It should be noted that the purpose of this step is to establish a direct physical transmission channel for refueling requests, avoiding delays and interference caused by multi-controller bus communication, and achieving real-time and high reliability of refueling triggering.

[0029] Hard-wired signals refer to discrete digital level signals transmitted through independent electrical wires, which do not rely on vehicle network protocols such as CAN / LIN; the refueling switch is a refueling request button manually operated by the user inside the driver's cab, which is physically separated from the refueling cap linkage mechanism.

[0030] Understandably, the controller periodically scans the level status of the hard-wired input port. When it detects a valid edge transition or a continuous valid level, it confirms that the refueling request has been triggered and locks the request status until the subsequent process is completed.

[0031] In one feasible implementation, step S10 includes steps A11 to A14: Step A11: Check the hardwire connection status of the refueling switch; It should be noted that the purpose of this step is to diagnose the integrity of the hardwired physical link to prevent refueling requests from failing to respond or being triggered falsely due to line breaks, short circuits, or poor contact.

[0032] The hard-wired connection status includes four basic states: continuity, short circuit to power supply, short circuit to ground, and high impedance floating. The detection method is the high-side / low-side drive and sampling circuit integrated inside the controller. It actively outputs test current and measures the voltage division value of the port voltage, and determines the current connection status based on the voltage threshold range.

[0033] Understandably, a hardwired signal is only considered reliable when the connection status is confirmed to be a normal path; otherwise, a hardwired fault code should be reported and the subsequent refueling process should be prohibited.

[0034] Step A12: When the hardwire connection status is normal, acquire the level value of the hardwire signal; It should be noted that the purpose of this step is to obtain the real-time electrical parameters of the refueling switch as a data basis for determining the user's intentions.

[0035] The voltage level refers to the voltage value of the hard-wired signal relative to the controller ground.

[0036] Typically, the pins corresponding to the main control characteristics are used for detection. The software logic or hardware performs filtering and anti-jitter processing on the acquired signal before it is used for subsequent logic judgment.

[0037] Step A13: Determine whether the level value meets the valid level condition; It should be noted that the purpose of this step is to filter out noise interference and abnormal levels to ensure that the refueling request is genuine and valid.

[0038] The effective level condition refers to the standard voltage range corresponding to when the switch is pressed. For example, a high effective signal must be greater than 4V and a low effective signal must be less than 3V. The judgment process compares the collected level value with the preset threshold window and detects whether the duration of the level exceeds the debounce time (e.g., 50ms).

[0039] Understandably, this condition judgment needs to be adapted to typical vehicle electrical environments, taking into account battery voltage fluctuations (9V to 16V) and electromagnetic interference, and setting a reasonable hysteresis window to improve robustness.

[0040] Step A14: When the level value meets the valid level condition, confirm that the refueling request signal has been received.

[0041] It should be noted that the purpose of this step is to generate a formal refueling request event, which will trigger the subsequent vehicle status check process.

[0042] Upon confirming receipt of the refueling request signal, the controller internally sets the request flag and locks the current state to prevent repeated triggering.

[0043] Understandably, this flag needs to remain in place until the refueling process ends or the timeout expires, during which time new hard-wired signal inputs are blocked to prevent user misoperation from causing logical confusion during refueling.

[0044] Step S20: Obtain vehicle status information based on hard-wired signals and determine whether the vehicle status information meets the refueling entry conditions. It should be noted that the purpose of this step is to ensure that refueling is only permitted under absolutely safe vehicle operating conditions, in order to prevent accidental refueling while driving and the resulting safety incidents.

[0045] The vehicle status information covers three key safety parameters: vehicle speed, gear position, and fuel tank system malfunction. The information is obtained by the controller sending read commands to the relevant sensors and controllers via a hard-wired direct connection or a private CAN bus.

[0046] Understandably, the refueling entry conditions are the first line of defense after the hard-wired signal is triggered. If any condition is not met, the process should be stopped immediately and a prompt message should be sent to the user, reflecting the design principle of "safety first".

[0047] In practical implementation, the car with a pressure-locking mechanical fuel filler cap has its refueling request switch hard-wired signal directly connected to the main refueling control controller. The controller can enter the refueling mode if the following conditions are met: the vehicle speed is less than the set value (e.g., vehicle speed ≤ 3km / h); the gear is in parking gear; and the fuel tank pressure relief valve or fuel tank pressure sensor is fault-free.

[0048] In one feasible implementation, step S20 includes steps A21 to A24: Step A21: Trigger the vehicle status information acquisition command based on the hard-wired signal; It should be noted that the purpose of this step is to unify the data reporting of each subsystem and form a dedicated information flow for refueling.

[0049] The vehicle status information acquisition command is a service request message generated internally by the controller; the trigger timing is achieved within the set time after the hard-wired signal is confirmed to be valid, and the continuous conditions (vehicle speed, gear) should be met in advance, and the control function is realized after the trigger signal is valid.

[0050] Understandably, the instruction includes a list of target controllers (such as motor controllers, gear shift controllers, and vehicle stability systems) and identifiers for the required parameters to avoid excessive bus load caused by broadcast requests.

[0051] Step A22: Collect vehicle speed information, gear information, and fuel tank system fault information according to the vehicle status information collection command; It should be noted that the purpose of this step is to aggregate all the real-time data required for determining refueling safety.

[0052] Vehicle speed information comes from the wheel speed sensor and is calculated by the ABS controller, which outputs a CAN signal; gear information is provided by the parking gear confirmation flag provided by the gear controller; fuel tank system fault information includes diagnostic statuses such as pressure relief valve drive circuit failure and pressure sensor signal failure.

[0053] Understandably, the controller needs to complete the collection of all information within the judgment period. If any information is not received within the time limit, it should be judged as a communication failure and considered as not meeting the refueling conditions.

[0054] Step A23: Determine whether the vehicle speed information is less than the preset vehicle speed threshold, whether the gear information is in parking gear, and whether the fuel tank system fault information indicates no fault. It should be noted that the purpose of this step is to verify the vehicle's stationary state and the system's health status item by item, in order to prevent danger caused by accidental movement or equipment failure.

[0055] The preset vehicle speed threshold (3km / h) is set below human walking speed to ensure the vehicle remains absolutely stationary; the parking gear is required to prevent the vehicle from moving while refueling; a fault check ensures that the pressure relief valve and pressure sensor are working properly.

[0056] It is understandable that the three judgments are logical AND relations and must be satisfied simultaneously, but the order of judgment can be optimized to execute in parallel to shorten the overall time consumption.

[0057] Step A24: When the vehicle speed is less than the preset vehicle speed threshold, the gear is in parking position, and the fuel tank system fault information indicates no fault, the refueling entry conditions are met.

[0058] It should be noted that the purpose of this step is to comprehensively evaluate various safety indicators and generate an access permit for the refueling process.

[0059] Determining that the refueling entry conditions are met means that the controller internally sets the refueling condition flag to true and records a snapshot of the parameters that meet the conditions; the technical means is to perform a three-input AND gate logic operation and add a timestamp.

[0060] Understandably, once this status is confirmed, the controller should lock the drive system to prevent it from waking up, and at the same time illuminate the fuel filler cap indicator light to inform the user that it is ready.

[0061] Step S30: When the vehicle status information meets the refueling entry conditions, control the fuel tank pressure relief valve to open and release pressure, prevent the engine from starting, and start the refueling timer to begin timing. It should be noted that the purpose of this step is to actively reduce the pressure inside the high-pressure fuel tank to atmospheric pressure, creating a safe refueling environment, while preventing pressure fluctuations or safety hazards caused by accidental engine starting.

[0062] In practical implementation, after entering refueling mode, the fuel tank pressure relief valve opens to release pressure. When the fuel tank pressure is lower than the set value, the mechanical locking mechanism of the fuel filler cap opens, allowing the fuel tank to be opened. At this time, starting the engine is prohibited, and a timer is started from the moment refueling mode is entered, lasting a maximum of t time (e.g., 30 minutes). In refueling mode, the vehicle can enter sleep mode under normal control, but the main refueling controller will enter a low-power mode to maintain the operation of the fuel tank pressure relief valve. It will not send external signals that could cause the electric fan, water pump to run, other controllers to wake up, relays and actuators to operate, or communication to occur, thus keeping the vehicle at the minimum unit power requirement for refueling control.

[0063] In one feasible implementation, step S30 includes: Obtain the tank pressure value collected by the tank pressure sensor; Determine whether the oil tank pressure value is greater than a preset pressure threshold; When the oil tank pressure value is greater than the preset pressure threshold, a first drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve; When the oil tank pressure value is less than or equal to a preset pressure threshold, a second drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve. Send an engine start-prevention command and start the refueling timer.

[0064] It should be noted that the purpose of this feature is to monitor the relative pressure inside the oil tank in real time, providing feedback for the intelligent actuation of the pressure relief valve.

[0065] The oil tank pressure value is converted into a voltage signal by a piezoresistive pressure sensor, which is then sampled and filtered by the controller's ADC. The actual ADC conversion is real-time, and the data transmission depends on the internal bus transmission rate of the controller. The underlying layer transmits data in real time, while the application layer sets different operating cycles according to different functional modules.

[0066] Understandably, the pressure value is the core parameter for determining whether the pressure relief is complete, and sensor zero drift and temperature drift must be taken into account, with zero-point self-learning calibration performed regularly.

[0067] Determine if the oil tank pressure value is greater than the preset pressure threshold; This feature also includes defining whether the fuel tank has been fully depressurized; a pressure of 5 kPa or higher indicates that depressurization is not complete. It also considers sensor error and zeroing issues; the filler cap can be opened when the pressure is below 5 kPa. This design primarily addresses the issue of fuel vapor escaping when the fuel tank cap is unscrewed or the filler cap pops open under high-pressure fuel vapor, thus avoiding operational risks.

[0068] Send an engine start-prevention command and start the refueling timer.

[0069] It should be noted that the purpose of this feature also includes forcibly prohibiting engine operation at the software level and establishing a time benchmark for the refueling process.

[0070] The engine start-prohibition command is broadcast to the engine controller and hybrid power controller via the CAN bus, locking their state machines in "start-prohibition" mode; the refueling timer accumulates the refueling duration from zero for subsequent timeout judgment.

[0071] Step S40: During the refueling mode operation, the fuel tank pressure relief valve is continuously driven to keep the fuel tank in a depressurized state, the timing value of the refueling timer is continuously monitored, and vehicle operation information is obtained in real time. It should be noted that the purpose of this step is to maintain a stable refueling environment and continuously assess the exit conditions, which is crucial for the safe operation of the refueling mode over a long period of time.

[0072] Continuous drive refers to periodically refreshing the drive signal according to the A33 or A34 command; continuous monitoring of the refueling timer refers to reading the timing value every second and comparing it with a preset duration threshold; real-time acquisition of vehicle operation information refers to listening to changes in gear, throttle, and vehicle speed through event triggering.

[0073] Understandably, this step achieves the core innovation that "the main refueling controller will enter a low-power mode, maintain the drive of the fuel tank pressure relief valve, and not send external signals that would cause the electric fan, water pump, or other controllers to start up." This reduces the controller's power consumption to a minimum by minimizing active communication and background tasks.

[0074] Step S50: When the timing value reaches the preset duration threshold or the vehicle operation information meets the forced exit conditions, stop driving the fuel tank pressure relief valve and exit the refueling mode.

[0075] It should be noted that the purpose of this step is to provide a proactive termination mechanism for the refueling process to prevent dangers caused by timeouts or user misoperation.

[0076] The preset time threshold (30min) is the upper limit of safe refueling time. Forced exit conditions include the user engaging gear and pressing the accelerator or the vehicle moving at a speed exceeding 10km / h.

[0077] Understandably, exiting refueling mode must be done in sequence: first, shut off the pressure relief valve drive, then clear the engine prohibition sign, and finally broadcast a refueling end message to ensure that the status of each controller is restored synchronously.

[0078] In practice, the refueling mode can be exited when any of the following conditions are met: the gear is detected to be forward / reverse and the throttle opening exceeds the set value; the vehicle speed exceeds the set value, such as 10km / h (ensuring the vehicle is in normal driving condition); or the refueling mode exceeds time t. After exiting the refueling mode, the vehicle can start the engine normally, the main refueling controller can go into hibernation normally, and stop driving the fuel tank pressure relief valve.

[0079] In one feasible implementation, step S50 includes steps A41 to A44: Step A41: Determine whether the timing value has reached the preset duration threshold; It should be noted that the purpose of this step is to implement refueling timeout protection to prevent the battery from being over-discharged due to prolonged refueling after the user leaves the vehicle.

[0080] The judgment process is an unsigned integer comparison. When the timer value is ≥1800 seconds, a timeout is triggered and the process exits. This threshold can be dynamically adjusted according to the battery SOC value.

[0081] It is understandable that timeout exit is a security protection measure rather than a user's intention, so there is no need for an audio or visual warning before exiting, but the reason for exiting should be recorded for after-sales diagnosis.

[0082] Step A42: Determine whether the vehicle operation information meets the first forced exit condition. The first forced exit condition is that the gear is driving and the throttle opening exceeds the preset opening threshold. It should be noted that the purpose of this step is to detect the user's intention to actively drive away, and to prevent false triggering through a combination of dual conditions.

[0083] The gear position refers to shifting from parking gear to drive gear or reverse gear; the throttle opening exceeds the preset opening threshold (such as 10%) to ensure that the user has a real need for acceleration and that it is not an unintentional touch; both conditions must be met simultaneously and remain effective for 100ms to avoid transient signal interference during gear switching.

[0084] Understandably, this design embodies the innovative point of "avoiding accidental touches that could cause the refueling nozzle to shut off," making it more robust than relying on a single condition.

[0085] Step A43: Determine whether the vehicle operation information meets the second forced exit condition. The second forced exit condition is that the vehicle speed exceeds the preset vehicle speed exit threshold. It should be noted that the purpose of this step is to detect that the vehicle is in driving mode and needs to exit the refueling mode so that the engine can start and be used normally to meet driving needs.

[0086] Understandably, this condition has the highest priority. Once triggered, the pressure relief valve should be immediately shut off to ensure that the fuel tank remains sealed during driving and to prevent fuel vapor leakage.

[0087] Step A44: When the timing value reaches the preset duration threshold, or the vehicle operation information meets the first forced exit condition, or the vehicle operation information meets the second forced exit condition, stop driving the fuel tank pressure relief valve and exit the refueling mode.

[0088] It should be noted that the purpose of this step is to combine the three exit conditions to safely terminate the refueling mode.

[0089] Stopping the fuel tank pressure relief valve means releasing the driver output stage; Exiting refueling mode means clearing all refueling-related flags, restoring engine start permission, waking up other controllers, and switching to normal driving mode.

[0090] Understandably, this step completes the closed loop of the refueling process, ensuring that the system can be restored to a drivable state regardless of whether refueling is completed normally, timeout protection is activated, or forced exit occurs, demonstrating the technical effect of "being able to easily exit refueling mode".

[0091] In its implementation, refueling control is based on vehicle speed, gear position, and refueling timer. The vehicle does not require high pressure, and engine starting is prohibited during refueling to ensure safety. The refueling trigger signal is sent directly to the main refueling controller, which directly drives the fuel tank pressure relief valve. No other controllers are needed during the refueling process; only the main refueling controller maintains a low-power mode, keeping the fuel tank pressure relief valve open, while other controllers can remain in sleep mode. If the user is in the vehicle, refueling can be initiated without complex operations such as high pressure control; even when the user is away from the vehicle, refueling can continue for an extended period without worrying about the nozzle shutting off prematurely or fuel overflowing, which could pose a danger.

[0092] This embodiment provides a low-power high-pressure fuel tank refueling control method. The refueling mode entry condition does not restrict the high-pressure state of the entire vehicle, but only judges the factors affecting refueling operation and safety, simplifying the control logic and refueling operation process, and improving vehicle use convenience; a low-power mode is developed to ensure that the refueling mode time is long enough and to minimize the risk of low-voltage battery depletion in the vehicle; the refueling mode can be easily exited, while avoiding accidental activation, which may cause the refueling nozzle to trip, fuel spillage, fire, and other risks.

[0093] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 Step S40 includes steps S401 to S404: Step S401: When the vehicle enters sleep mode during refueling operation, a low-power operation state is entered, and the drive signal output of the fuel tank pressure relief valve is maintained in the low-power operation state. It should be noted that the purpose of this step is to achieve optimal management of the vehicle's power consumption in refueling mode. The core is to reduce the vehicle's consumption by putting other controllers into a sleep state, rather than mainly relying on reducing the clock frequency of the controller itself.

[0094] The vehicle enters a dormant state when all other controllers (such as the engine controller, body controller, and infotainment system) except the fuel main controller have entered a low-power or off state, and bus communication is silent. The low-power operating state means that the main controller shuts down the central processing unit core, high-speed clock and most peripherals, and only retains the necessary wake-up timer and input / output interface functions.

[0095] Understandably, the trigger source for detecting the vehicle entering sleep mode is the bus network management status (controller area network sleep confirmation signal) or the ignition off signal lasting for 5 seconds. This aligns with the core innovation that "the vehicle can enter sleep mode under normal control during refueling," thus decoupling the refueling process from the vehicle's power management.

[0096] In one feasible implementation, step S401 includes steps A51 to A54: Step A51: Obtain low-power operation configuration parameters; It should be noted that the purpose of this step is to read the pre-stored power management policy to provide a configuration basis for maintaining the refueling function.

[0097] Low-power operation configuration parameters include register settings such as clock source selection, power supply mode, wake-up source enable, and input / output interface hold status, which are stored in the controller's electrically erasable programmable read-only memory or the flash memory analog electrically erasable programmable read-only memory area; the parameters are saved when the controller is powered off and loaded during power-on initialization.

[0098] Understandably, different low-power parameters need to be configured for different battery capacities (such as 45 Ah and 60 Ah) or ambient temperatures (such as -30 degrees Celsius to 60 degrees Celsius) in order to balance power consumption and wake-up reliability. These parameters can be updated online through the diagnostic service.

[0099] Step A52: Configure the main controller clock source as a low-power clock source according to the low-power operation configuration parameters; It should be noted that the purpose of this step is to reduce unnecessary drives and put other controllers into hibernation, thereby reducing the overall energy consumption of the vehicle.

[0100] Understandably, the main controller's clock source switches from a high-speed operating state to a low-speed state. This adjustment is only an auxiliary measure, and the core energy saving still comes from reducing unnecessary drives and other controllers going into sleep mode. The clock source switching should be performed after the pressure relief valve drive has stabilized to avoid signal disturbance and ensure drive continuity.

[0101] Step A53: Configure the main controller power supply mode to hold mode according to the low-power operation configuration parameters; It should be noted that the purpose of this step is to adjust the controller's power management strategy, with the focus on maintaining the interface and critical states without power loss to ensure the continuous operation of the pressure relief valve.

[0102] In hold mode, the main controller maintains the necessary power supply, and the pressure relief valve drive configuration and refueling status are maintained by an independent power supply. Its power consumption contribution is relatively small compared to the hibernation of other controllers in the vehicle.

[0103] Understandably, the hold mode requires hardware support for backup registers or retain random access memory. When selecting a microcontroller, an automotive-grade microcontroller with low-power hold function should be used to ensure that it can continue execution from the original state after being woken up.

[0104] Step A54: In hold mode, limit other outputs of the main control to the outside world through a low-power clock source, while retaining the drive signal output to the oil tank pressure relief valve.

[0105] It should be noted that the purpose of this step is to precisely control the output behavior of the controller, so as to ensure that the core refueling function is not interrupted while reducing the overall activity level.

[0106] The low-speed characteristics of the low-power clock source limit the controller's processing power and response speed, making it unable to support high-frequency switching or complex calculations, thus naturally suppressing unnecessary output tasks. Other external outputs include background activities such as bus message transmission, actuator control signals, and diagnostic service responses, all of which can be paused in refueling mode. Retaining the drive signal output to the fuel tank pressure relief valve means maintaining the drive waveform through a hardware timer or latching circuit, unaffected by clock switching.

[0107] Understandably, this design concentrates limited low-power operating resources on the core task of maintaining the pressure relief valve open, thereby optimizing the vehicle's energy consumption while ensuring the safety and continuity of the refueling process.

[0108] Step S402: Stop sending wake-up signals to other controllers so that other controllers enter sleep mode; It should be noted that the purpose of this step is to proactively release activation requests to other controllers, thereby accelerating the vehicle's entry into low-power bus sleep mode.

[0109] Wake-up signals include network management messages or power mode broadcasts; after transmission stops, each controller enters sleep mode sequentially.

[0110] Understandably, this operation demonstrates the architectural advantage of "no other controllers need to participate in the refueling control process, and only the main refueling controller maintains a low-power mode." By reducing the number of active bus nodes and actuator actions, the power consumption of the entire vehicle is reduced to the minimum unit required for refueling.

[0111] Step S403: Continuously monitor the timing value of the refueling timer; It should be noted that the purpose of this step is to track the duration of the refueling process and provide real-time data for timeout protection.

[0112] Continuous monitoring means that the hardware timer continues to accumulate the count at a resolution of 1 second even in low-power mode. The controller wakes up every 10 seconds to read and compare the count value. The timing value of the refueling timer is stored in reserved random access memory and is not lost when power is off.

[0113] Understandably, this monitoring mechanism ensures that the time base remains accurate even when the controller is in deep sleep, preventing the battery from being consumed indefinitely due to refueling timeouts after the user leaves the vehicle, thus achieving a balance between "ensuring that the refueling mode lasts long enough and minimizing the risk of low-voltage battery depletion in the vehicle."

[0114] Step S404: Real-time acquisition of gear change information, throttle opening information, and vehicle speed change information.

[0115] It should be noted that the purpose of this step is to detect the user's intention to drive away and abnormal vehicle movement, providing input for a forced exit.

[0116] Real-time acquisition is not 100% periodic sampling, but is triggered by the controller local area network wake-up mechanism or hard-wired interrupt. The controller is only woken up for brief processing when the gear switch state changes, the throttle voltage change rate exceeds the threshold, or the vehicle speed pulse edge arrives. The acquisition frequency drops to below 1 Hz during sleep, significantly reducing power consumption.

[0117] Understandably, by using an event-driven approach rather than a polling approach, we can ensure both fast response and low power consumption, and avoid accidental touches. This is because we need to detect a clear combination of gear shift and acceleration or a continuous increase in vehicle speed before determining that the exit is valid.

[0118] This embodiment provides a low-power, high-pressure fuel tank refueling control method. Through an innovative architecture that directly connects the refueling switch signal to the controller, it enables one-button triggering and intelligent management of the refueling mode for plug-in hybrid vehicles without deactivating the high-pressure state of the entire vehicle. This completely solves the user pain point of traditional solutions requiring cumbersome power-off operations. During the refueling process, the controller enters a deep low-power operation state, maintaining only the pressure relief valve drive and necessary monitoring, effectively avoiding the risks of nozzle tripping, fuel overflow, and fire caused by refueling timeout. The system constructs a comprehensive safety protection system through four safety access conditions (vehicle speed, gear, fuel tank malfunction) and a dual exit mechanism (refueling time, driving intention), significantly improving the reliability and anti-accidental touch capability of the refueling scenario.

[0119] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the low-power high-pressure oil tank refueling control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0120] This application also provides a low-power, high-pressure fuel tank refueling control device; please refer to [reference needed]. Figure 5 The low-power, high-pressure fuel tank refueling control device includes: The signal receiving module 10 is used to respond to the hard-wired signal from the refueling switch; The mode judgment module 20 is used to obtain vehicle status information based on hard-wired signals and determine whether the vehicle status information meets the refueling entry conditions. The refueling execution module 30 is used to control the fuel tank pressure relief valve to open and release pressure, prevent the engine from starting, and start the refueling timer when the vehicle status information meets the refueling entry conditions. The low-power operation module 40 is used to continuously drive the fuel tank pressure relief valve during refueling mode operation to keep the fuel tank in a depressurized state, continuously monitor the timing value of the refueling timer and obtain vehicle operation information in real time. The exit control module 50 is used to stop driving the fuel tank pressure relief valve and exit the refueling mode when the timing value reaches the preset duration threshold or the vehicle operation information meets the forced exit conditions.

[0121] The low-power high-pressure fuel tank refueling control device provided in this application, employing the low-power high-pressure fuel tank refueling control method described in the above embodiments, can solve the technical problem of how to achieve low-power, long-term safe refueling control without limiting the high-pressure state of the entire vehicle. Compared with the prior art, the beneficial effects of the low-power high-pressure fuel tank refueling control device provided in this application are the same as those of the low-power high-pressure fuel tank refueling control method provided in the above embodiments, and other technical features in the low-power high-pressure fuel tank refueling control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0122] In one embodiment, the signal receiving module 10 is also used to detect the hard-wired connection status of the refueling switch; When the hardwire connection is in a normal connection state, the level value of the hardwire signal is collected; Determine whether the voltage level meets the valid voltage level condition; When the voltage level meets the valid voltage level condition, the refueling request signal is confirmed to have been received.

[0123] In one embodiment, the mode determination module 20 is further configured to trigger a vehicle status information collection command based on a hard-wired signal; Collect vehicle speed information, gear information, and fuel tank system fault information according to the vehicle status information collection command; Determine whether the vehicle speed information is less than the preset vehicle speed threshold, whether the gear information is in parking gear, and whether the fuel tank system fault information indicates no fault. When the vehicle speed is less than the preset speed threshold, the gear is in park, and the fuel tank system fault information indicates no fault, the refueling entry conditions are met.

[0124] In one embodiment, the refueling execution module 30 is also used to acquire the tank pressure value collected by the tank pressure sensor; Determine if the oil tank pressure value is greater than the preset pressure threshold; When the oil tank pressure exceeds the preset pressure threshold, a first drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve. When the oil tank pressure is less than or equal to the preset pressure threshold, a second drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve. Send an engine start-prevention command and start the refueling timer.

[0125] In one embodiment, the low-power operation module 40 is also used to enter a low-power operation state when the vehicle enters a sleep state during refueling mode operation, and maintain the output of the drive signal of the fuel tank pressure relief valve in the low-power operation state. Stop sending wake-up signals to other controllers, so that other controllers enter sleep mode; Continuously monitor the timer readings; It can acquire information on gear changes, throttle opening, and vehicle speed changes in real time.

[0126] In one embodiment, the low-power operation module 40 is further configured to configure the main controller clock source as a low-power clock source according to the low-power operation configuration parameters. Configure the main controller power supply mode to hold mode according to the low-power operation configuration parameters; In hold mode, other outputs of the main control are limited by a low-power clock source, while the drive signal output to the tank pressure relief valve is retained.

[0127] In one embodiment, the exit control module 50 is also used to determine whether the timing value has reached a preset duration threshold; Determine whether the vehicle operation information meets the first forced exit condition. The first forced exit condition is that the gear is driving and the throttle opening exceeds the preset opening threshold. Determine whether the vehicle operation information meets the second forced exit condition. The second forced exit condition is that the vehicle speed exceeds the preset vehicle speed exit threshold. When the timing value reaches the preset duration threshold, or when the vehicle operation information meets the first forced exit condition, or when the vehicle operation information meets the second forced exit condition, the fuel tank pressure relief valve is stopped and the refueling mode is exited.

[0128] This application provides a low-power high-pressure fuel tank refueling control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the low-power high-pressure fuel tank refueling control method in the above embodiment 1.

[0129] The following is for reference. Figure 6 This document illustrates a structural schematic diagram of a low-power, high-pressure fuel tank refueling control device suitable for implementing embodiments of this application. The low-power, high-pressure fuel tank refueling control device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 6 The low-power high-pressure fuel tank refueling control device shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0130] like Figure 6As shown, the low-power high-pressure fuel tank refueling control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in ROM (Read Only Memory) 1002 or a program loaded from storage device 1003 into RAM (Random Access Memory) 1004. RAM 1004 also stores various programs and data required for the operation of the low-power high-pressure fuel tank refueling control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the low-power high-pressure fuel tank refueling control device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a low-power high-pressure fuel tank refueling control device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented alternatively.

[0131] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0132] The low-power high-pressure fuel tank refueling control device provided in this application, employing the low-power high-pressure fuel tank refueling control method described in the above embodiments, can solve the technical problem of how to achieve low-power, long-term safe refueling control without limiting the high-pressure state of the entire vehicle. Compared with the prior art, the beneficial effects of the low-power high-pressure fuel tank refueling control device provided in this application are the same as those of the low-power high-pressure fuel tank refueling control method provided in the above embodiments, and other technical features of this low-power high-pressure fuel tank refueling control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0133] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0134] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0135] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the low-power high-pressure fuel tank refueling control method in the above embodiments.

[0136] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory or Flash Memory), optical fibers, CD-ROM (CD-Read Only Memory), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0137] The aforementioned computer-readable storage medium may be included in the low-power high-pressure fuel tank refueling control device; or it may exist independently and not be assembled into the low-power high-pressure fuel tank refueling control device.

[0138] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by the low-power high-pressure fuel tank refueling control device, the low-power high-pressure fuel tank refueling control device: responds to a hard-wired signal from the refueling switch; acquires vehicle status information based on the hard-wired signal and determines whether the vehicle status information meets the refueling entry conditions; when the vehicle status information meets the refueling entry conditions, controls the fuel tank pressure relief valve to open and release pressure, prohibits engine starting, and starts the refueling timer; during the refueling mode operation, continuously drives the fuel tank pressure relief valve to keep the fuel tank in a depressurized state, continuously monitors the timing value of the refueling timer, and acquires vehicle operation information in real time; when the timing value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions, stops driving the fuel tank pressure relief valve and exits the refueling mode.

[0139] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including LAN (Local Area Network) or WAN (Wide Area Network)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0140] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0141] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0142] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned low-power high-pressure fuel tank refueling control method. This solves the technical problem of how to achieve low-power, long-term safe refueling control without limiting the high-pressure state of the entire vehicle. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the low-power high-pressure fuel tank refueling control method provided in the above embodiments, and will not be repeated here.

[0143] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the low-power high-pressure fuel tank refueling control method described above.

[0144] The computer program product provided in this application solves the technical problem of how to achieve low-power, long-term safe refueling control without limiting the high-pressure state of the entire vehicle. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the low-power, high-pressure fuel tank refueling control method provided in the above embodiments, and will not be repeated here.

[0145] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A low-power, high-pressure fuel tank refueling control method, characterized in that, The method includes: Responds to a hardwired signal from the fuel filler switch; The vehicle status information is obtained based on the hard-wired signal, and it is determined whether the vehicle status information meets the refueling entry conditions. When the vehicle status information meets the refueling entry conditions, the fuel tank pressure relief valve is opened to release pressure, the engine is prevented from starting, and the refueling timer is started. During refueling mode operation, the fuel tank pressure relief valve is continuously driven to keep the fuel tank in a depressurized state, and the timing value of the refueling timer is continuously monitored and vehicle operation information is obtained in real time. When the timing value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions, the fuel tank pressure relief valve is stopped and the refueling mode is exited.

2. The method as described in claim 1, characterized in that, The step of responding to a hard-wired signal from the fuel filler switch includes: Check the hardwire connection status of the refueling switch; When the hardwire connection is in a normal connection state, the level value of the hardwire signal is collected; Determine whether the stated voltage level meets the valid voltage level condition; When the level value meets the valid level condition, the refueling request signal is confirmed to have been received.

3. The method as described in claim 1, characterized in that, The step of obtaining vehicle status information based on the hard-wired signal and determining whether the vehicle status information meets the refueling entry conditions includes: The vehicle status information acquisition command is triggered based on the hard-wired signal; According to the vehicle status information collection command, vehicle speed information, gear information, and fuel tank system fault information are collected; Determine whether the vehicle speed information is less than a preset vehicle speed threshold, whether the gear information is in parking gear, and whether the fuel tank system fault information indicates no fault. When the vehicle speed information is less than a preset vehicle speed threshold, the gear information is in parking gear, and the fuel tank system fault information indicates no fault, it is determined that the refueling entry conditions are met.

4. The method as described in claim 1, characterized in that, The steps of controlling the fuel tank pressure relief valve to open and release pressure, preventing engine start, and starting the refueling timer when the vehicle status information meets the refueling entry conditions include: Obtain the tank pressure value collected by the tank pressure sensor; Determine whether the oil tank pressure value is greater than a preset pressure threshold; When the oil tank pressure value is greater than the preset pressure threshold, a first drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve; When the oil tank pressure value is less than or equal to a preset pressure threshold, a second drive command is sent to the oil tank pressure relief valve to continuously drive the oil tank pressure relief valve. Send an engine start-prevention command and start the refueling timer.

5. The method as described in claim 1, characterized in that, The steps of continuously driving the fuel tank pressure relief valve to keep the fuel tank in a depressurized state during refueling mode operation, continuously monitoring the timing value of the refueling timer, and obtaining vehicle operation information in real time include: When the vehicle enters a sleep state during refueling mode, the system enters a low-power operation state and maintains the output of the drive signal for the fuel tank pressure relief valve during this low-power operation state. Stop sending wake-up signals to other controllers, so that other controllers enter sleep mode; Continuously monitor the timing value of the refueling timer; It can acquire information on gear changes, throttle opening, and vehicle speed changes in real time.

6. The method as described in claim 5, characterized in that, The step of entering a low-power operating state and maintaining the drive signal output of the oil tank pressure relief valve in the low-power operating state includes: Obtain low-power operation configuration parameters; Configure the main controller clock source as a low-power clock source according to the low-power operation configuration parameters; Configure the main controller power supply mode to hold mode according to the low-power operation configuration parameters; In the hold mode, the low-power clock source restricts other outputs of the main control to the outside world, while retaining the drive signal output to the oil tank pressure relief valve.

7. The method as described in claim 1, characterized in that, The step of stopping the actuation of the fuel tank pressure relief valve and exiting the refueling mode when the timing value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions includes: Determine whether the time value has reached a preset duration threshold; Determine whether the vehicle operation information meets the first forced exit condition. The first forced exit condition is that the gear is driving and the throttle opening exceeds a preset opening threshold. Determine whether the vehicle operation information meets the second forced exit condition, and determine that the second forced exit condition is that the vehicle speed exceeds a preset vehicle speed exit threshold; When the timing value reaches a preset duration threshold, or when the vehicle operation information meets the first forced exit condition, or when the vehicle operation information meets the second forced exit condition, the fuel tank pressure relief valve is stopped and the refueling mode is exited.

8. A low-power, high-pressure fuel tank refueling control device, characterized in that, The device includes: A signal receiving module for responding to hard-wired signals from the refueling switch; The mode determination module is used to obtain vehicle status information based on the hard-wired signal and determine whether the vehicle status information meets the refueling entry conditions. The refueling execution module is used to control the fuel tank pressure relief valve to open and release pressure, prevent the engine from starting, and start the refueling timer when the vehicle status information meets the refueling entry conditions. A low-power operation module is used to continuously drive the fuel tank pressure relief valve during refueling mode operation to keep the fuel tank in a depressurized state, continuously monitor the timing value of the refueling timer and obtain vehicle operation information in real time; The exit control module is used to stop driving the fuel tank pressure relief valve and exit the refueling mode when the time value reaches a preset duration threshold or the vehicle operation information meets the forced exit conditions.

9. A low-power, high-pressure fuel tank refueling control device, characterized in that, The device includes: a memory, a processor, and a low-power high-pressure fuel tank refueling control program stored in the memory and executable on the processor, the low-power high-pressure fuel tank refueling control program being configured to implement the steps of the low-power high-pressure fuel tank refueling control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a low-power high-pressure fuel tank refueling control program, which, when executed by a processor, implements the steps of the low-power high-pressure fuel tank refueling control method as described in any one of claims 1 to 7.

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