Display method and system of fuel gauge

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a fuel gauge display method and system.The fuel gauge display method comprises the steps that when a vehicle is in a parking working condition, first fuel quantity information of the vehicle is obtained through an oil floating sensor, and the first fuel quantity information is sent to a calculation control unit; when the duration of the vehicle entering the parking working condition does not exceed the preset duration, the fuel gauge display screen keeps the displayed fuel quantity value unchanged, and after the duration of the vehicle entering the parking working condition exceeds the preset duration, the calculation control unit obtains fuel quantity change information according to the obtained first fuel quantity information; and according to the oil quantity change information, whether the oil quantity value displayed by the fuel gauge display screen needs to be updated in real time according to the obtained first oil quantity information is judged.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, and specifically relates to a method and system for displaying a fuel gauge. Background Technology

[0002] The accuracy of the fuel gauge display is crucial for driving safety and fuel management. An inaccurate fuel gauge reading can lead to drivers misjudging the remaining fuel level, resulting in sudden fuel depletion while driving, causing breakdowns, or even traffic accidents. Traditional fuel gauge systems typically use a fuel float sensor to collect fuel level data. The MCU in the vehicle's instrument cluster calculates the resistance of the fuel float sensor in the fuel tank and converts this resistance value into corresponding fuel gauge data. The fuel gauge display shows the remaining fuel level based on this data. However, because the resistance of the fuel float sensor fluctuates with the tilt and movement of the fuel level in the tank, fuel gauge systems using this sensor can experience frequent and drastic fluctuations in the displayed fuel level, easily leading to drivers misjudging the remaining fuel level.

[0003] To address the aforementioned issues, existing technologies have proposed fuel gauge display systems that employ a fuel float sensor and a fuel injection meter to separately collect fuel quantity and fuel consumption data. This system obtains fuel gauge display data by calibrating the fuel quantity using the fuel float sensor when the vehicle is stationary, and then calculating the actual fuel quantity using the fuel injection meter based on the calibrated fuel quantity when the vehicle is in motion. This ensures that the fuel quantity value displayed on the fuel gauge screen remains stable during driving conditions.

[0004] However, because the fuel gauge display system needs to calibrate the fuel level during refueling, and without the addition of other sensors, the existing fuel gauge display system does not have the function of determining whether the vehicle is refueling. This means that the existing fuel gauge display system usually needs to continuously calibrate the fuel level when the vehicle is parked. This also causes the fuel level displayed on the fuel gauge display to be calibrated to an incorrect value for a long time when the vehicle is parked on uneven roads or slopes, due to the continuous tilt of the fuel level in the tank. This poses a technical problem that can easily lead to the driver misjudging the remaining fuel level. Summary of the Invention

[0005] This invention provides a method and system for displaying a fuel gauge, solving the problem that existing fuel gauge display systems, without the addition of other sensors, lack the ability to determine whether a vehicle is refueling. This necessitates continuous fuel level calibration while the vehicle is parked, leading to errors in fuel level readings when the vehicle is parked on uneven or sloping surfaces. The continuous tilting of the fuel level in the tank causes the fuel gauge to display an incorrect value for an extended period, potentially leading to driver misjudgment of remaining fuel.

[0006] The technical solution adopted in this invention is: a method for displaying a fuel gauge, the method comprising: When the vehicle is parked, the first fuel level information of the vehicle is obtained by using the fuel float sensor installed in the fuel tank of the vehicle, and the first fuel level information is sent to the calculation control unit. When the duration of the vehicle in the parking condition does not exceed a preset duration, the fuel gauge display will maintain the displayed fuel level value until the duration of the vehicle in the parking condition reaches the preset duration or the vehicle switches to driving condition. After the vehicle has been in the parking state for more than the preset time, the calculation control unit obtains fuel level change information based on the acquired first fuel level information, and determines whether the fuel level value displayed on the fuel gauge display needs to be corrected based on the current fuel level change information. If the vehicle switches to driving mode, or the calculation control unit has determined that the fuel level value displayed on the fuel gauge display needs to be corrected, the determination of whether the fuel level value displayed on the fuel gauge display needs to be corrected stops. If it is determined that the fuel level value displayed on the fuel gauge display needs to be corrected, the calculation control unit updates the fuel level value displayed on the fuel gauge display in real time based on the acquired first fuel level information until the vehicle switches to driving mode; otherwise, the fuel level value displayed on the fuel gauge display remains unchanged until the vehicle switches to driving mode.

[0007] By ensuring the vehicle remains in the parking state for longer than a preset time, and then using the calculation control unit to obtain the current fuel level change information based on the first fuel level information received since the vehicle entered the parking state, the fuel level change data (i.e., the fuel level change information) obtained by the calculation control unit after the vehicle comes to a complete stop can be used to determine whether the fuel level displayed on the fuel gauge needs to be corrected at any time between the moment the vehicle enters the parking state for the preset time and the moment the vehicle switches to driving mode. This allows for accurate determination of the fuel level in the parking state without the need for additional sensors. This system can determine whether refueling has occurred or if there has been a leak, and it can also maintain the displayed fuel level on the fuel gauge display when the fuel level in the tank is continuously tilted (e.g., when the vehicle is parked on an uneven road or slope). This solves the problem that existing fuel gauge display systems, without additional sensors, lack the ability to determine whether the vehicle is refueling. As a result, existing fuel gauge display systems usually need to continuously calibrate the fuel level when the vehicle is parked, which leads to the fuel level displayed on the fuel gauge display being calibrated to an incorrect value for a long time when the vehicle is parked on an uneven road or slope due to the continuous tilt of the fuel level in the tank. This poses a technical problem that can easily lead to the driver misjudging the remaining fuel level.

[0008] By ensuring that the fuel gauge display maintains a constant fuel level when the vehicle is parked for no more than the preset duration, it also ensures that the fuel level displayed on the fuel gauge display is not calibrated when the vehicle is parked for a short period of time (such as during a temporary stop or while waiting at a traffic light), thus avoiding excessively frequent calibration of the fuel level displayed on the fuel gauge display.

[0009] Furthermore, the preset duration ranges from ten seconds to thirty seconds.

[0010] There are several methods to obtain information on the current oil volume change, including but not limited to: In the first technical solution, the current oil quantity change information includes the first oil quantity change value at the current moment; The method for obtaining the first fuel quantity change value at the current moment includes: the calculation control unit obtains the average fuel quantity value of all fuel quantity detection values ​​during the period from when the vehicle enters the parking condition to when the duration of the vehicle's parking time reaches the preset duration, and the first fuel quantity detection value of the vehicle at the current moment, based on the obtained first fuel quantity information. The calculation and control unit calculates the first change in fuel quantity at the current moment based on the average fuel quantity value and the first fuel quantity detection value.

[0011] The method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation and control unit makes a judgment based on the first fuel quantity change value at the current moment. If the absolute value of the first fuel quantity change value is greater than the first preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display needs to be corrected; if the first fuel quantity change value is not greater than the first preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display does not need to be corrected.

[0012] Wherein, the first change in fuel quantity at the current moment is equal to the difference between the average fuel quantity value and the first detected fuel quantity value at the current moment.

[0013] The first preset oil volume value ranges from 2 liters to 5 liters.

[0014] Based on the first technical solution, in the second technical solution, when the vehicle switches from driving mode to parking mode, the fuel gauge display screen sends the first fuel level display value corresponding to the vehicle entering the parking mode to the calculation control unit. The calculation and control unit obtains the oil quantity change information based on the acquired first oil quantity information and the corresponding first oil quantity display value. The fuel tank change information at the current moment also includes the second fuel quantity change value at the current moment; The method for obtaining the second fuel quantity change value at the current moment includes: the calculation control unit obtains the first fuel quantity detection value of the vehicle at the current moment based on the acquired first fuel quantity information; The calculation and control unit calculates the second fuel quantity change value at the current moment based on the first fuel quantity detection value and the corresponding first fuel quantity display value.

[0015] The method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation and control unit makes a judgment based on the first fuel quantity change value and the second fuel quantity change value at the current moment. If the absolute value of the first fuel quantity change value is not greater than the first preset fuel quantity value and the absolute value of the second fuel quantity change value is not greater than the second preset fuel quantity value, it is determined that there is no need to correct the fuel quantity value displayed on the fuel gauge display screen; otherwise, it is determined that the fuel quantity value displayed on the fuel gauge display screen needs to be corrected.

[0016] The second fuel quantity change value at the current moment is equal to the difference between the first fuel quantity detection value at the current moment and the corresponding first fuel quantity display value.

[0017] The second preset oil quantity value ranges from 5 liters to 10 liters.

[0018] By calculating the second fuel quantity change value at the current moment based on the first fuel quantity detection value and the corresponding first fuel quantity display value, and determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value, the fuel gauge display method provided by the present invention can be applied to the display system of a fuel gauge that calculates the actual fuel quantity using the fuel consumption collected by the fuel injector under driving conditions. It can eliminate the cumulative error when the cumulative error of the fuel consumption collected by the fuel injector is large by determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value.

[0019] In the third technical solution, the current oil quantity change information includes the current third oil quantity change value; The method for obtaining the third fuel quantity change value at the current moment includes: the calculation control unit obtains the second fuel quantity detection value when the duration since the vehicle entered the parking condition is the preset duration, and the first fuel quantity detection value of the vehicle at the current moment, based on the acquired first fuel quantity information; The calculation and control unit calculates the third change value of oil quantity at the current moment based on the first oil quantity detection value and the second oil quantity detection value.

[0020] The method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation and control unit makes a judgment based on the third fuel quantity change value at the current moment. If the absolute value of the third fuel quantity change value is greater than the third preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display needs to be corrected; if the third fuel quantity change value is not greater than the third preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display does not need to be corrected.

[0021] Furthermore, the display method also includes: when the vehicle switches from a parking state to a driving state, using the fuel gauge display screen to send the second fuel level display value corresponding to the vehicle entering the driving state to the calculation control unit; When the vehicle is in driving condition, the fuel consumption information corresponding to the current driving condition is obtained by the fuel injection meter installed on the engine of the vehicle, and the obtained fuel consumption information is sent to the calculation control unit; the calculation control unit generates fuel level display information in real time based on the corresponding second fuel level display value and the corresponding fuel consumption information; the calculation control unit updates the fuel level value displayed on the fuel gauge display screen in real time based on the real-time generated fuel level display information until the vehicle switches to parking condition.

[0022] By combining the fuel consumption information obtained from the fuel injector during any given driving condition, the calculation and control unit generates real-time fuel level display information based on the corresponding second fuel level display value and the corresponding fuel consumption information. It then updates the fuel level value displayed on the fuel gauge screen in real-time based on the generated fuel level display information until the vehicle switches to a stationary state. This ensures that the fuel level value displayed on the fuel gauge screen remains stable while the vehicle is in motion, preventing the driver from misjudging the remaining fuel level.

[0023] Furthermore, the display method also includes: when the vehicle is in driving condition, using the oil float sensor to obtain the vehicle's second fuel quantity information, and sending the second fuel quantity information to the calculation control unit; While the vehicle is in operation, the calculation and control unit obtains a third fuel level detection value based on the second fuel level information at the current moment. The calculation and control unit then determines whether the fuel level displayed on the fuel gauge needs to be corrected based on this third fuel level detection value. If the third fuel level detection value is greater than the warning fuel level, it is determined that no correction is needed. If the third fuel level detection value is not greater than the warning fuel level, the third fuel level display value is sent to the calculation and control unit via the fuel gauge display. The calculation and control unit then again determines whether the fuel level displayed on the fuel gauge needs to be corrected based on this third fuel level. If the third fuel level is not greater than the warning fuel level, it is determined that no correction is needed. If the third fuel level is greater than the warning fuel level, it is determined that the fuel level needs to be corrected, and the calculation and control unit corrects the fuel level displayed on the fuel gauge based on the warning fuel level.

[0024] When the third fuel level detection value is not greater than the warning fuel level value, and the third fuel level display value is greater than the warning fuel level value, the calculation and control unit corrects the fuel level value displayed on the fuel gauge display screen based on the warning fuel level value. This ensures that if the fuel level value displayed on the fuel gauge display screen is greater than the actual remaining fuel level in the tank due to the cumulative error of the fuel consumption data collected by the fuel injector, and the actual remaining fuel level in the tank is no greater than the warning fuel level value, the calculation and control unit can immediately correct the fuel level value displayed on the fuel gauge display screen to the warning fuel level value to remind the driver to refuel in time. This avoids the driver misjudging the remaining fuel level and suddenly running out of fuel while driving, leading to breakdowns or even traffic accidents.

[0025] Based on the two technical solutions of whether or not the fuel injection meter is provided in the fuel gauge display method provided by the present invention, the present invention also provides two fuel gauge display systems respectively.

[0026] In one of the technical solutions: Based on the fuel gauge display method provided by the present invention, the present invention provides a fuel gauge display system, including: a fuel float sensor installed in the fuel tank of a vehicle, and a calculation control unit and a fuel gauge display screen installed on the vehicle. Both the fuel gauge display and the fuel float sensor are communicatively connected to the calculation and control unit.

[0027] The fuel gauge display system in the above technical solution is used to execute the display method of the fuel gauge provided by the present invention, which is a display method in the technical solution without the fuel injection meter.

[0028] In another technical solution: Based on the fuel gauge display method provided by the present invention, the present invention provides a fuel gauge display system, including: a fuel float sensor installed in the fuel tank of a vehicle, a fuel injection meter installed on the engine of the vehicle, and a calculation control unit and a fuel gauge display screen installed on the vehicle. The fuel gauge display, the fuel float sensor, and the fuel injection meter are all communicatively connected to the calculation and control unit.

[0029] The fuel gauge display system in the above technical solution is used to execute the display method of the fuel gauge provided by the present invention, specifically the display method in the technical solution where the fuel injection meter is provided. Attached Figure Description

[0030] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart illustrating the fuel gauge display method in Example 1; Figure 2 This is a flowchart illustrating the fuel gauge display method in Example 2. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] Example 1: As Figure 1As shown in the figure, this embodiment 1 provides a method for displaying a fuel gauge, the method including: When the vehicle is parked, the first fuel level information of the vehicle is obtained by the fuel float sensor installed in the fuel tank of the vehicle, and the first fuel level information is sent to the calculation control unit. When the time the vehicle is in parking mode does not exceed the preset time, the fuel gauge display will keep the fuel level unchanged until the time the vehicle is in parking mode reaches the preset time or the vehicle switches to driving mode. If the vehicle remains in a parking position for more than a preset period, the calculation and control unit obtains fuel level change information based on the acquired first fuel level information. Based on the current fuel level change information, it determines whether the fuel level displayed on the fuel gauge needs to be corrected. If the vehicle switches to a driving position, or if the calculation and control unit has already determined that the fuel level displayed on the fuel gauge needs correction, the determination of whether correction is needed stops. If correction is determined, the calculation and control unit updates the fuel level displayed on the fuel gauge in real time based on the acquired first fuel level information until the vehicle switches to a driving position. Otherwise, the fuel level displayed on the fuel gauge remains unchanged until the vehicle switches to a driving position.

[0034] By ensuring the vehicle remains in a parking state for an extended period (exceeding a preset time), and then using the calculation control unit to obtain the current fuel level change based on the initial fuel level information received since the vehicle entered the parking state, the system can determine whether the fuel level displayed on the fuel gauge needs adjustment at any point between the moment the vehicle enters the parking state (reaching the preset time) and the moment the vehicle switches back to driving mode. This allows for accurate determination of whether the vehicle has been refueled or leaked while parked without the need for additional sensors. This new system can maintain a constant fuel level on the fuel gauge display even when the fuel level in the tank is continuously tilted (e.g., when the vehicle is parked on uneven or sloping roads). This solves the problem that existing fuel gauge systems, without additional sensors, lack the ability to determine whether the vehicle is refueling. As a result, these systems typically require continuous fuel level calibration while the vehicle is parked, leading to incorrect fuel level readings on the display due to the continuous tilt of the fuel tank when the vehicle is parked on uneven or sloping roads. This can cause drivers to misjudge the remaining fuel level.

[0035] By ensuring that the fuel gauge display maintains a constant fuel level when the vehicle is parked for no more than a preset duration, it also ensures that the fuel level displayed on the fuel gauge display is not calibrated when the vehicle is parked for short periods (such as temporary stops or waiting at traffic lights), thus avoiding excessively frequent calibration of the fuel level displayed on the fuel gauge display.

[0036] In this embodiment 1, the preset duration ranges from ten seconds to thirty seconds.

[0037] Preferably, in this embodiment 1, the preset duration is fifteen seconds.

[0038] There are several methods to obtain information on the current oil volume change, including but not limited to the following: Option A: The current fuel quantity change information includes the first fuel quantity change value at the current moment; The method for obtaining the first fuel quantity change value at the current moment includes: the calculation control unit obtains the average fuel quantity value of all fuel quantity detection values ​​during the period from when the vehicle enters the parking condition to when the vehicle enters the parking time reaches a preset time, based on the obtained first fuel quantity information, and the first fuel quantity detection value of the vehicle at the current moment. The calculation control unit calculates the first change in fuel quantity at the current moment based on the average fuel quantity value and the first fuel quantity detection value.

[0039] Specifically, in Scheme A, the method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation control unit makes a judgment based on the first change value of fuel quantity at the current moment. If the absolute value of the first change value of fuel quantity is greater than the first preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display needs to be corrected; if the first change value of fuel quantity is not greater than the first preset fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display does not need to be corrected.

[0040] The first change in fuel quantity at the current moment is equal to the difference between the average fuel quantity and the first detected fuel quantity at the current moment.

[0041] The first preset oil volume value ranges from 2 liters to 5 liters.

[0042] Preferably, the first preset oil volume is 4 liters.

[0043] Option B: Scheme B is an optimization based on Scheme A. In Scheme B, when the vehicle switches from driving mode to parking mode, the fuel gauge display screen sends the first fuel level value corresponding to the vehicle entering the parking mode to the calculation control unit. The calculation and control unit obtains the oil quantity change information based on the acquired first oil quantity information and the corresponding first oil quantity display value; The fuel tank change information at the current moment also includes the second fuel quantity change value at the current moment; The method for obtaining the second fuel quantity change value at the current moment includes: the calculation control unit obtains the first fuel quantity detection value of the vehicle at the current moment based on the acquired first fuel quantity information; The calculation control unit calculates the second fuel quantity change value at the current moment based on the first fuel quantity detection value and the corresponding first fuel quantity display value.

[0044] Correspondingly, in Scheme B, the method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation control unit makes a judgment based on the first fuel quantity change value and the second fuel quantity change value at the current moment. If the absolute value of the first fuel quantity change value is not greater than the first preset fuel quantity value and the absolute value of the second fuel quantity change value is not greater than the second preset fuel quantity value, it is determined that there is no need to correct the fuel quantity value displayed on the fuel gauge display; otherwise, it is determined that the fuel quantity value displayed on the fuel gauge display needs to be corrected.

[0045] The second fuel quantity change value at the current moment is equal to the difference between the first fuel quantity detection value at the current moment and the corresponding first fuel quantity display value.

[0046] The second preset oil quantity value ranges from 5 liters to 10 liters.

[0047] Preferably, the second preset oil volume value is 8 liters.

[0048] By calculating the second fuel quantity change value at the current moment based on the first fuel quantity detection value and the corresponding first fuel quantity display value, and determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value, the fuel gauge display method provided by the present invention can be applied to the display system of a fuel gauge that calculates the actual fuel quantity using the fuel consumption collected by the fuel injector under driving conditions. It can eliminate the cumulative error when the cumulative error of the fuel consumption collected by the fuel injector is large by determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value.

[0049] Option C: The current fuel quantity change information includes the third fuel quantity change value at the current moment; The method for obtaining the third fuel quantity change value at the current moment includes: the calculation control unit obtains the second fuel quantity detection value when the duration since the vehicle entered the parking condition is a preset duration, and the first fuel quantity detection value of the vehicle at the current moment, based on the obtained first fuel quantity information; The calculation control unit calculates the third change in fuel quantity at the current moment based on the first and second fuel quantity detection values.

[0050] Correspondingly, in Scheme C, the method for determining whether the fuel level displayed on the fuel gauge needs to be corrected based on the current fuel level change information includes: The calculation control unit makes a judgment based on the third fuel quantity change value at the current moment. If the absolute value of the third fuel quantity change value is greater than the third preset fuel quantity value, it determines that the fuel quantity value displayed on the fuel gauge display needs to be corrected; if the third fuel quantity change value is not greater than the third preset fuel quantity value, it determines that the fuel quantity value displayed on the fuel gauge display does not need to be corrected.

[0051] Example 2: As Figure 2 As shown, based on the fuel gauge display method provided in Embodiment 1, Embodiment 2 also provides a fuel gauge display method. The difference between the fuel gauge display method provided in Embodiment 2 and the fuel gauge display method provided in Embodiment 1 is that the fuel gauge display method provided in Embodiment 2 further includes: when the vehicle switches from a parking state to a driving state, the fuel gauge display screen sends the second fuel quantity display value corresponding to the current driving state to the calculation control unit. When the vehicle is in driving condition, the fuel consumption information corresponding to the current driving condition is obtained by the fuel injection meter installed on the vehicle's engine, and the obtained fuel consumption information is sent to the calculation control unit. The calculation control unit generates fuel level display information in real time based on the corresponding second fuel level display value and the corresponding fuel consumption information. The calculation control unit updates the fuel level value displayed on the fuel gauge display in real time based on the real-time generated fuel level display information until the vehicle switches to parking condition.

[0052] By combining the fuel injection meter to obtain fuel consumption information for each time the vehicle enters a driving condition, the calculation and control unit generates real-time fuel level display information based on the corresponding second fuel level display value and the corresponding fuel consumption information. It then updates the fuel level displayed on the fuel gauge screen in real-time based on the generated fuel level display information until the vehicle switches to a stationary state. This ensures that the fuel level displayed on the fuel gauge screen remains stable while the vehicle is in motion, preventing the driver from misjudging the remaining fuel level.

[0053] Preferably, in this embodiment 2, the fuel gauge display method further includes: when the vehicle is in driving condition, obtaining the vehicle's second fuel quantity information using a fuel float sensor, and sending the second fuel quantity information to the calculation control unit; While the vehicle is in operation, the calculation and control unit (CCU) obtains the vehicle's third fuel level detection value based on the second fuel level information at the current moment. The CCU then determines whether the fuel level displayed on the fuel gauge needs adjustment based on this third fuel level detection value. If the third fuel level detection value is greater than the warning fuel level, it is determined that no adjustment is needed. If the third fuel level detection value is not greater than the warning fuel level, the third fuel level display value is sent from the fuel gauge display to the CCU. The CCU again determines whether the fuel level displayed on the fuel gauge needs adjustment based on this third fuel level. If the third fuel level display value is not greater than the warning fuel level, it is determined that no adjustment is needed. If the third fuel level display value is greater than the warning fuel level, it is determined that the fuel level displayed on the fuel gauge needs adjustment, and the CCU adjusts the fuel level displayed on the fuel gauge based on the warning fuel level.

[0054] By calculating and controlling the fuel gauge display value to correct the fuel level value based on the warning value when the third fuel level detection value is not greater than the warning value and the third fuel level display value is greater than the warning value, the system ensures that even if the fuel level value displayed on the fuel gauge display value is greater than the actual remaining fuel in the tank due to the cumulative error of fuel consumption data collected by the fuel injector, and the actual remaining fuel in the tank is no greater than the warning value, the calculation and control unit can immediately correct the fuel level value displayed on the fuel gauge display to the warning value to remind the driver to refuel in time. This avoids the driver misjudging the remaining fuel level and suddenly running out of fuel while driving, which could lead to breakdowns or even traffic accidents.

[0055] Example 3: Based on the fuel gauge display method provided in Example 1, Example 3 provides a fuel gauge display system, including: a fuel float sensor installed in the fuel tank of a vehicle, and a computing control unit and a fuel gauge display screen installed on the vehicle; Both the fuel gauge display and the fuel float sensor are connected to the computing control unit.

[0056] The fuel gauge display system provided in Example 3 is used to execute the fuel gauge display method provided in Example 1.

[0057] Example 4: Based on the fuel gauge display method provided in Example 2, Example 4 provides a fuel gauge display system, including: a fuel float sensor installed in the fuel tank of the vehicle, a fuel injection meter installed on the engine of the vehicle, and a calculation control unit and a fuel gauge display screen installed on the vehicle. The fuel gauge display, fuel float sensor, and fuel injection meter are all connected in communication with the computing control unit.

[0058] The fuel gauge display system provided in Example 4 is used to execute the fuel gauge display method provided in Example 2.

[0059] The fuel gauge display method and system provided by this invention have at least the following technical effects or advantages: 1. By ensuring the vehicle remains in a parking state for an extended period (exceeding a preset time), the calculation control unit uses the initial fuel level information received since the vehicle entered the parking state to determine the current fuel level change. This allows the system to accurately determine whether refueling or fuel leakage has occurred while the vehicle is parked, without the need for additional sensors. This is achieved by using the fuel level change data (i.e., fuel level change information) obtained from the calculation control unit after the vehicle has come to a complete stop, and then comparing this data with the fuel level change at any point between the preset parking time and the moment the vehicle switches back to driving mode. It can also maintain the fuel level displayed on the fuel gauge even when the fuel level in the tank is continuously tilted (e.g., when the vehicle is parked on uneven or sloping roads). This solves the problem that existing fuel gauge systems, without additional sensors, cannot determine whether the vehicle is refueling. As a result, existing fuel gauge systems usually need to continuously calibrate the fuel level when the vehicle is parked, which leads to the fuel level displayed on the fuel gauge being calibrated to an incorrect value for a long time due to the continuous tilt of the fuel level in the tank when the vehicle is parked on uneven or sloping roads. This poses a technical problem that can easily cause the driver to misjudge the remaining fuel level.

[0060] 2. By ensuring that the fuel gauge display maintains a constant fuel level when the vehicle is parked for no more than a preset duration, it also ensures that the fuel level displayed on the fuel gauge display is not calibrated when the vehicle is parked for a short period of time (such as temporary stops or waiting at traffic lights), thus avoiding excessively frequent calibration of the fuel level displayed on the fuel gauge display.

[0061] 3. By calculating the second fuel quantity change value at the current moment based on the first fuel quantity detection value and the corresponding first fuel quantity display value, and determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value, the fuel gauge display method provided by the present invention can be applied to the display system of the fuel gauge that calculates the actual fuel quantity using the fuel consumption collected by the fuel injector under driving conditions. It can eliminate the cumulative error when the cumulative error of the fuel consumption collected by the fuel injector is large, by determining that the fuel quantity value displayed on the fuel gauge display needs to be corrected when the absolute value of the second fuel quantity change value is greater than the second preset fuel quantity value.

[0062] 4. By combining the fuel injection meter to obtain fuel consumption information for each time the vehicle enters a driving condition, the calculation and control unit generates real-time fuel level display information based on the corresponding second fuel level display value and the corresponding fuel consumption information. It then updates the fuel level displayed on the fuel gauge screen in real-time based on the generated fuel level display information until the vehicle switches to a stationary state. This ensures that the fuel level displayed on the fuel gauge screen remains stable while the vehicle is in motion, preventing the driver from misjudging the remaining fuel level.

[0063] 5. By calculating and controlling the fuel level displayed on the fuel gauge screen when the third fuel level detection value is not greater than the warning fuel level value, and the third fuel level display value is greater than the warning fuel level value, the fuel level display on the fuel gauge screen can be corrected to the warning fuel level value by the calculation and control unit. This ensures that when the fuel level displayed on the fuel gauge screen is greater than the actual remaining fuel in the tank due to the cumulative error of the fuel consumption data collected by the fuel injector, and the actual remaining fuel in the tank is no greater than the warning fuel level value, the calculation and control unit can immediately correct the fuel level displayed on the fuel gauge screen to the warning fuel level value to remind the driver to refuel in time. This avoids the driver misjudging the remaining fuel level and suddenly running out of fuel while driving, which could lead to breakdowns or even traffic accidents.

[0064] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A display method of a fuel gauge, characterized by, The display method comprises: When the vehicle is in a parking condition, obtaining first fuel quantity information of the vehicle by using a fuel float sensor arranged in a fuel tank of the vehicle, and sending the first fuel quantity information to a calculation control unit; When a duration that the vehicle is in the parking condition is not more than a preset duration, maintaining the displayed fuel quantity value of the fuel gauge display screen unchanged until the duration that the vehicle is in the parking condition reaches the preset duration or the vehicle switches to a driving condition; After the duration that the vehicle is in the parking condition exceeds the preset duration, the calculation control unit obtains fuel quantity change information according to the obtained first fuel quantity information, judges whether the displayed fuel quantity value of the fuel gauge display screen needs to be corrected according to the current fuel quantity change information; if the vehicle switches to the driving condition or the calculation control unit has judged that the displayed fuel quantity value of the fuel gauge display screen needs to be corrected, the judgment of whether the displayed fuel quantity value of the fuel gauge display screen needs to be corrected is stopped; if it is judged that the displayed fuel quantity value of the fuel gauge display screen needs to be corrected, the calculation control unit updates the displayed fuel quantity value of the fuel gauge display screen in real time according to the obtained first fuel quantity information until the vehicle switches to the driving condition; otherwise, the displayed fuel quantity value of the fuel gauge display screen is maintained unchanged until the vehicle switches to the driving condition.

2. The display method of a fuel gauge according to claim 1, wherein The current fuel quantity change information comprises a first fuel quantity change value at the current time; The method for obtaining the first fuel quantity change value at the current time comprises: the calculation control unit obtains an average fuel quantity value of all fuel quantity detection values during a period from when the vehicle enters the parking condition to when the duration that the vehicle is in the parking condition reaches the preset duration, and a first fuel quantity detection value of the vehicle at the current time according to the obtained first fuel quantity information; The calculation control unit calculates the first fuel quantity change value at the current time according to the average fuel quantity value and the first fuel quantity detection value.

3. The display method of a fuel gauge according to claim 2, wherein The method for judging whether the displayed fuel quantity value of the fuel gauge display screen needs to be corrected according to the current fuel quantity change information comprises: The calculation control unit judges according to the first fuel quantity change value at the current time; if an absolute value of the first fuel quantity change value is greater than a first preset fuel quantity value, it is judged that the displayed fuel quantity value of the fuel gauge display screen needs to be corrected; if the first fuel quantity change value is not greater than the first preset fuel quantity value, it is judged that the displayed fuel quantity value of the fuel gauge display screen does not need to be corrected.

4. The display method of a fuel gauge according to claim 2, wherein When the vehicle switches from the driving condition to the parking condition, the fuel gauge display screen sends the first fuel quantity display value corresponding to the current parking condition of the vehicle to the calculation control unit; The calculation control unit obtains fuel quantity change information according to the obtained first fuel quantity information and the corresponding first fuel quantity display value; The current fuel tank change information further comprises a second fuel quantity change value at the current time; The method for obtaining the second fuel quantity change value at the current time comprises: the calculation control unit obtains the first fuel quantity detection value of the vehicle at the current time according to the obtained first fuel quantity information; The calculation control unit calculates a second oil amount change value at the current time according to the first oil amount detection value and the corresponding first oil amount display value.

5. The display method of a fuel gauge according to claim 4, wherein The method for determining whether the fuel gauge display screen needs to correct the oil amount value at the current time according to the oil amount change information at the current time comprises: The calculation control unit determines according to the first oil amount change value and the second oil amount change value at the current time, if the absolute value of the first oil amount change value is not greater than a first preset oil amount value, and the absolute value of the second oil amount change value is not greater than a second preset oil amount value, it is determined that the fuel gauge display screen does not need to correct the oil amount value; otherwise, it is determined that the fuel gauge display screen needs to correct the oil amount value.

6. The display method of a fuel gauge according to claim 1, wherein The oil amount change information at the current time comprises a third oil amount change value at the current time; The method for obtaining the third oil amount change value at the current time comprises: the calculation control unit obtains a second oil amount detection value at a time when the vehicle has been in the parking condition for a preset time, according to the obtained first oil amount information, and a first oil amount detection value of the vehicle at the current time; The calculation control unit calculates a third oil amount change value at the current time according to the first oil amount detection value and the second oil amount detection value.

7. The display method of a fuel gauge according to claim 1, wherein The display method further comprises: When the vehicle switches from the parking condition to the driving condition, the fuel gauge display screen sends the second oil amount display value corresponding to the current driving condition of the vehicle to the calculation control unit; When the vehicle is in the driving condition, the fuel injection meter arranged on the engine of the vehicle obtains the oil consumption information corresponding to the current driving condition of the vehicle, and sends the obtained oil consumption information to the calculation control unit; the calculation control unit generates oil amount display information in real time according to the corresponding second oil amount display value and the corresponding oil consumption information; the calculation control unit updates the oil amount value displayed on the fuel gauge display screen in real time according to the real-time generated oil amount display information, until the vehicle switches to the parking condition.

8. The display method of a fuel gauge according to claim 7, wherein The display method further comprises: When the vehicle is in the driving condition, the oil float sensor obtains the second oil amount information of the vehicle, and sends the second oil amount information to the calculation control unit; During the driving mode of the vehicle, the calculation control unit obtains a third fuel quantity detection value of the vehicle at the current time according to the second fuel quantity information at the current time; the calculation control unit judges whether the fuel quantity value displayed on the fuel gauge display screen needs to be corrected at the current time according to the third fuel quantity detection value at the current time, if the third fuel quantity detection value is greater than a pre-warning fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display screen does not need to be corrected at the current time; if the third fuel quantity detection value is not greater than the pre-warning fuel quantity value, the third fuel quantity detection value of the vehicle at the current time is sent to the calculation control unit by the fuel gauge display screen, the calculation control unit judges again whether the fuel quantity value displayed on the fuel gauge display screen needs to be corrected at the current time according to the third fuel quantity detection value, if the third fuel quantity detection value is not greater than the pre-warning fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display screen does not need to be corrected at the current time; if the third fuel quantity detection value is greater than the pre-warning fuel quantity value, it is determined that the fuel quantity value displayed on the fuel gauge display screen needs to be corrected at the current time, the calculation control unit corrects the fuel quantity value displayed on the fuel gauge display screen according to the pre-warning fuel quantity value.

9. A display system for a fuel gauge, characterized by Comprising: a fuel float sensor arranged in a fuel tank of a vehicle, and a calculation control unit and a fuel gauge display screen arranged on the vehicle; the fuel gauge display screen and the fuel float sensor are in communication connection with the calculation control unit; the display system of the fuel gauge is used to execute the display method of the fuel gauge as claimed in any one of claims 1-6.

10. A display system for a fuel gauge, characterized by Comprising: a fuel float sensor arranged in a fuel tank of a vehicle, an injection meter arranged on an engine of the vehicle, and a calculation control unit and a fuel gauge display screen arranged on the vehicle; the fuel gauge display screen, the fuel float sensor and the injection meter are in communication connection with the calculation control unit; the display system of the fuel gauge is used to execute the display method of the fuel gauge as claimed in any one of claims 7-8.

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