CN105865565B - Method and device for displaying remaining fuel of automobile - Google Patents

Abstract

The invention discloses a method for displaying the remaining fuel of an automobile, which comprises the following steps: the IGN is powered on the automobile; acquiring a fuel value in a fuel tank; calling out the fuel value obtained before the last parking power failure and the fuel value displayed by the display instrument from the storage area, and taking the absolute value of a first difference between the fuel value and the fuel value; judging whether the absolute value of the first difference is smaller than a first preset value; if the absolute value of the first difference is smaller than the first preset value, the absolute value of a second difference between the fuel value acquired this time and the fuel value acquired before the last parking outage is taken; judging whether the absolute value of the second difference value is smaller than or equal to a second preset value; if the absolute value of the second difference is smaller than or equal to a second preset value, the acquired fuel value is regarded as a real fuel value; and displaying the acquired fuel value. The invention also discloses a device for displaying the residual fuel of the automobile.

Description

Method and device for displaying remaining fuel of automobile

technical field

The present invention relates to a display method and device, in particular to a method and device for displaying the remaining fuel of an automobile.

Background technique

The dashboard of the car has the function of displaying the remaining fuel of the car. The commonly used technology is to set a sensor in the fuel tank, so that the sensor can periodically collect the remaining fuel in the car's fuel tank, and then display the remaining fuel through the display instrument. in front of the staff. This method cannot truly reflect the fuel situation in the car. For example, when encountering large or small bumps on the road, the fuel in the fuel tank will inevitably fluctuate with the bumps of the car. Then, the fuel collected at this time is either It will be much lower than the real fuel, or it will be much higher than the real fuel; for example, on a steep or gentle slope road, the fuel in the fuel tank will inevitably show a slope corresponding to the slope road or will rise slightly. Sloshing, then the fuel collected at this time also cannot reflect the real value in the fuel tank. Therefore, the existing means cannot make the display instrument display the real fuel or relatively real fuel in the fuel tank.

SUMMARY OF THE INVENTION

Aiming at the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a method and a device that can truly or more realistically display the fuel in the fuel tank of an automobile.

In order to solve the above-mentioned technical problems, a technical scheme adopted in the present invention is: a method for displaying the remaining fuel oil of an automobile is provided, comprising the following steps:

The car is powered on IGN;

Get the fuel value in the fuel tank;

From the storage area, recall the fuel value obtained before the last stop and power failure and the fuel value displayed by the display instrument, and take the absolute value of the first difference between them;

determining whether the absolute value of the first difference is less than a first preset value;

If it is determined that the absolute value of the first difference is smaller than the first preset value, then take the second difference between the fuel value obtained this time and the fuel value obtained before the last shutdown and power failure the absolute value of ;

determining whether the absolute value of the second difference is less than or equal to a second preset value;

If it is determined that the absolute value of the second difference is less than or equal to the second preset value, the fuel value obtained this time is regarded as the real fuel value;

Displays the fuel value obtained this time.

Wherein, in the step of judging whether the absolute value of the first difference is less than the first preset value, the step further includes:

If it is determined that the absolute value of the first difference is greater than or equal to the first preset value, the fuel value obtained this time is regarded as an unreal fuel value;

Display the fuel value displayed by the display instrument before the last stop and power failure.

Wherein, in the step of judging whether the absolute value of the second difference is less than or equal to the second preset value, the step further includes:

If it is determined that the absolute value of the second difference is greater than the second preset value, the fuel value obtained this time is regarded as the fuel value obtained after the vehicle is refueled;

Displays the fuel value after refueling obtained this time.

Further, the method for displaying the remaining fuel of the vehicle further includes:

Determine whether the car is in driving mode;

If it is determined that the car is in the driving mode, the fuel value of the fuel tank is obtained;

Compare the fuel value obtained this time with the fuel value displayed last time;

If the fuel value obtained this time is less than the fuel value displayed last time, and the absolute value of their third difference is less than a third preset value, the fuel value obtained at this time is regarded as the fuel value in the driving mode. true fuel value;

Display the fuel value obtained this time.

Among them, in the step of comparing the fuel value obtained this time with the fuel value displayed last time, it also includes:

If the absolute value of the third difference between the fuel value obtained this time and the fuel value displayed last time is greater than or equal to the third preset value, the fuel value obtained this time is regarded as unreal fuel value;

The fuel value obtained this time is not displayed.

Wherein, in the step of judging whether the car is in the driving mode, it also includes:

If it is determined that the vehicle is in a non-driving mode, determining whether the vehicle is in an idle mode;

If it is determined that the vehicle is in the idle mode, the remaining fuel value is calculated every predetermined time;

Displays the remaining fuel value for each calculation.

Wherein, if it is determined that the vehicle is in the idle mode, the step of calculating the remaining fuel value every predetermined time includes:

Collecting the pulse signal representing fuel consumption sent by the engine ECU every time period in the above-mentioned predetermined time period;

According to the pulse signal sent by the ECU in each period of time, analyze the number of single pulses and the fuel injection amount of each pulse in the pulse signal during this period of time;

Accumulated fuel consumption is obtained according to the number of analyzed pulses and the fuel injection quantity of each pulse, wherein the accumulated fuel consumption is equal to the total number of pulses collected in the above predetermined time multiplied by the fuel injection quantity per unit pulse;

The remaining fuel value is obtained according to the accumulated fuel consumption, wherein the remaining fuel value is equal to the previously displayed fuel value minus the accumulated fuel consumption.

Wherein, in the step of judging whether the car is in the idle mode, it further includes: if it is determined that the car is in the non-idle mode, determining whether the car is in the parking mode;

If it is determined that the car is in the parking mode, the last displayed fuel value and the last collected fuel value until the car is in the parking mode are stored.

In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a device for displaying the remaining fuel of an automobile, including:

The car power-on module is used to power on the car IGN;

The first acquisition module is used to acquire the fuel value in the fuel tank after the vehicle is powered on with the IGN;

The first value acquisition module is used to call out the fuel value obtained before the last stop and power off and the fuel value displayed by the display instrument from the storage area, and take the absolute value of the first difference between them;

a first judging module for judging whether the absolute value of the first difference is less than a first preset value;

The second value obtaining module is configured to obtain the difference between the fuel value obtained this time and the last time when the absolute value of the first difference is determined by the first judgment module to be less than the first preset value. The absolute value of the second difference of the fuel value obtained before the shutdown and power failure;

a second judgment module, configured to judge whether the absolute value of the second difference is less than or equal to a second preset value;

The real fuel value determination module is used for determining that the absolute value of the second difference is less than or equal to the second preset value in the second judgment module, and the fuel value obtained this time is regarded as the real fuel value ;

The display module is used to display the fuel value obtained this time.

Further, the real fuel value determination module is further configured to, when the first determination module determines that the absolute value of the first difference is greater than or equal to the first preset value, then the acquired value is the fuel value is regarded as an untrue fuel value;

The display module is also used to display the fuel value displayed by the display instrument before the last stop and power failure;

The real fuel value determination module is further configured to, when the second judgment module judges that the absolute value of the second difference is greater than the second preset value, the fuel value obtained this time is regarded as being in the vehicle. The fuel value obtained after refueling;

The display module is also used to display the fuel value obtained this time after refueling.

Compared with the prior art, the present invention enables the vehicle to display real or relatively real fuel value in the modes of parking, idling, driving and refueling, and has the following beneficial effects: It is convenient for car owners to know the real or relatively real fuel in the fuel tank of the car they drive in real time, and it is convenient for car owners to judge whether they need to increase the fuel immediately, avoiding the traditional display method, due to the inaccuracy of the displayed fuel value. The jump of the fuel tank causes the car owner to make a wrong judgment on the fuel remaining in the fuel tank. The method and device for displaying the remaining fuel in the vehicle make the displayed fuel closer to the real fuel in the fuel tank.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of the first embodiment of the method for displaying the remaining fuel of an automobile according to the present invention.

FIG. 2 is a flow chart of the second embodiment of the method for displaying the remaining fuel of an automobile according to the present invention.

FIG. 3 is a flow chart of calculating the remaining fuel value in the second embodiment of the method for displaying the remaining fuel of an automobile according to the present invention.

FIG. 4 is a schematic structural diagram of a pulse signal in the second embodiment of the method for displaying the remaining fuel of an automobile according to the present invention.

FIG. 5 is a block diagram of an embodiment of the apparatus for displaying the remaining fuel of an automobile according to the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

First, before describing the embodiments, it is necessary to explain some terms appearing in this document. E.g:

Where the terms "first", "second" and the like appear herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element could also be termed a "second" element without departing from the teachings of the present invention.

In addition, it will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

Various terms appearing herein are used for the purpose of describing particular embodiments only and are not intended to be limiting of the present invention. The singular forms are intended to include the plural forms as well, unless the context clearly dictates otherwise.

When the terms "comprising" and/or "comprising" are used in this specification, these terms indicate the presence of the stated feature, integer, step, operation, element and/or component, but do not exclude one or more other features, The existence and/or addition of an integer, step, operation, element, component and/or group thereof.

Regarding the example:

Please refer to FIG. 1 . FIG. 1 is a flow chart of the first embodiment of the method for displaying the remaining fuel of an automobile according to the present invention. The method for displaying the remaining fuel of an automobile of the present embodiment includes the following steps:

S101. The car is powered on the IGN;

S102. Obtain the fuel value in the fuel tank;

In this step, the value in the fuel tank is collected by the fuel sensor provided in the fuel tank of the automobile, and the fuel value is obtained after processing.

S103, recall from the storage area the fuel value obtained before the last stop and power failure and the fuel value displayed by the display instrument, and take the absolute value of the first difference between them;

In this embodiment, the storage area may refer to the memory of the fuel value displayed by the instrument last time in the memory of the car, and the fuel value collected by the sensor but not yet displayed, or the collected fuel value that does not belong to the real fuel value but not the displayed fuel value.

In this step, the first difference ΔL=the fuel value L2 displayed by the display meter-the fuel value L1 obtained before the last power failure; or the first difference ΔL=the fuel value obtained before the last power failure The fuel value L1 - the fuel value L2 displayed by the display instrument.

S104, judging whether the absolute value of the first difference is less than a first preset value; if it is judged that the absolute value of the first difference is less than the first preset value, go to step S105; if it is judged that the absolute value of the first difference is less than the first preset value When the absolute value of the obtained first difference is greater than or equal to the first preset value, go to step S109;

The first preset value refers to P% of the total fuel volume L. In this embodiment, the total volume of the fuel tank L*8% is used as the first preset value. In this step, determine whether the ΔL is less than the total volume of the fuel tank L*8%;

S105, taking the absolute value of the second difference between the fuel value obtained this time and the fuel value obtained before the last shutdown and power failure;

In this step, the second difference ΔL1 = the fuel value L3 obtained this time - the fuel value L1 obtained before the last power failure, or the second difference ΔL1 = the fuel value obtained before the last power failure Fuel value L1 - the fuel value L3 obtained this time.

S106, judging whether the absolute value of the second difference is less than or equal to a second preset value; if it is judged that the second difference is less than or equal to the second preset value, then go to step S107; if When it is determined that the second difference value is greater than the second preset value, then go to step S111;

In this embodiment, the second preset value and the first preset value may take the same value. For example, take 8% of the total volume L of the fuel tank;

In this step, it is determined whether the ΔL1 is less than or equal to L*8% of the total volume of the fuel tank.

S107. If it is determined that the absolute value of the second difference is less than or equal to the second preset value, the fuel value obtained this time is regarded as the real fuel value;

The real fuel value is the fuel value collected by the fuel sensor when the vehicle is on a level road or is approaching a level road.

S108. Display the fuel value obtained this time;

In this step, when the difference between the fuel value L2 displayed by the display meter before the last power failure and the fuel value L1 collected before the last power failure is small, it is considered that the fuel value collected last time was when the vehicle was on a level surface or was in a trend of decline. It is collected when it is close to the horizontal plane; in this case, by comparing the fuel value L3 collected after the power-on with the fuel value L1 collected before the last power-off, when the difference is small, then It is considered that the fuel value L3 collected after the power-on is also collected when the car is in the horizontal plane or close to the horizontal plane; then if the above conditions are met, the fuel value L3 collected after the power-on is considered to be The real fuel value, the real fuel value obtained this time is displayed through the display instrument.

S109. Treat the fuel value obtained this time as an unreal fuel value;

In this step, when the absolute value of the first difference between the fuel value L2 displayed by the display instrument before the last power failure and the fuel value L1 collected by the fuel sensor before the last power failure is greater than or equal to the total volume of the fuel tank * 8%, It is considered that the car was on a slope road when the car was stopped last time; then, the first acquisition after power-on is also considered to be collected when the car was on a slope road, so the first acquisition after the power-on is regarded as The received fuel value is regarded as an unreal fuel value.

S110. Display the fuel value displayed by the display instrument before the last stop and power failure;

When the fuel value collected for the first time after power-on is an unreal fuel value, the fuel value collected this time will not be displayed, and the fuel value displayed by the display instrument before the last power-off will continue to be displayed.

S111, regard the fuel value obtained this time as the fuel value obtained after the car is refueled;

In this step, the absolute value of the first difference ΔL of the first difference ΔL between the fuel value L2 displayed by the display instrument before the last power failure and the fuel value L1 collected by the fuel sensor before the last power failure is less than the total fuel tank of the vehicle. The volume L*8%, and after meeting this condition, the second difference ΔL1 between the fuel value L3 collected after the power-on and the fuel value L1 collected before the last power-off is greater than the total fuel tank of the car. When the volume is L*8%, it is considered that the car was on a level road or approaching a level road when the power was turned off last time, and after the power was turned on, the fuel in the fuel tank of the car increased, then it was considered that the power was cut off last time. After that, when the car is powered on after refueling, the fuel value obtained this time is regarded as the fuel value after refueling, and is regarded as a relatively real fuel value.

S112: Display the obtained fuel value after refueling this time.

In the embodiment of the present invention, by calculating and judging the fuel value L1 collected before the last shutdown and power failure, the fuel value L2 displayed by the display instrument, and the fuel value L3 collected at the current time after power-on, it can be judged When the power is turned off for the next stop, whether the car is parked on a level road or close to a level road, or on a steep road, if it is parked on a level road, it will display the more real fuel value collected after power-on. When parking on a steep road, it will continue to display the fuel value displayed by the display instrument after the last stop and power failure; it can also be judged whether the last power failure is the real parking mode, or whether the engine is temporarily turned off for refueling. When the car is refueling and the engine is temporarily turned off, the fuel after refueling obtained this time will be displayed on the display instrument. Through the above steps, the car can display the real or more real fuel value in the fuel tank of the car, which is convenient for real or more real display of the fuel in the fuel tank in different modes such as the idle mode or the driving mode after the car is powered on; It is more convenient for the owner to make an accurate judgment and facilitate the follow-up actions of the owner.

Please refer to FIG. 2 , which is a flowchart of a second embodiment of the method for displaying the remaining fuel of an automobile according to the present invention. In addition to all the steps in the first embodiment, the method for displaying the remaining fuel of a vehicle in this embodiment further includes the following steps:

S201, determine whether the car is in the driving mode; if it is determined that the car is in the driving mode, then go to step S202; if it is determined that the car is not in the driving mode, then go to step S208;

In this step, the driving mode means that the vehicle is in a driving state, that is, the vehicle power supply is IGN, the vehicle speed is greater than zero, and the rotational speed is greater than zero. In this embodiment, when it is determined that the vehicle is in this state, the fuel value of the fuel tank is obtained.

S202. Obtain the fuel value of the fuel tank;

S203: Compare the fuel value obtained this time with the fuel value displayed last time; if the fuel value obtained this time is smaller than the fuel value displayed last time, and the absolute value of the third difference between them When it is less than a third preset value, enter step S204; if the absolute value of the third difference between the fuel value obtained this time and the fuel value displayed last time is greater than or equal to the third preset value by comparison , then go to step S206;

In this step, the fuel value displayed last time refers to the real fuel value displayed by the display instrument for the latest time before the fuel sensor collects the fuel value of the fuel tank this time, and this fuel value is used as a judgment standard. The real fuel value is the fuel value collected by the fuel sensor when the car is running on a flat surface or on a road section approaching a flat surface; when the car is on a bumpy road or a sloped road during driving, the fuel tank of the car is If the fuel inside is in a non-level state, then the fuel collected by the fuel sensor on the road above is considered to be an unreal fuel value.

The third preset value may take the same value as the first preset value and the second preset value, that is, the total volume L*8% of the fuel tank of the automobile. It can be understood that, in different embodiments, the first preset value, the second preset value and the third preset value can be transformed differently according to different vehicle models, urban road conditions or other conditions. In this step, when the fuel value obtained this time is less than the fuel value displayed by the display instrument, and the difference between them is less than 8% of the total volume L of the fuel tank, the road on which the car is driving is considered to be a normal road, that is, a horizontal road or a trending road. If the road surface is close to the level, then the fuel value obtained this time is considered to be the real fuel value.

S204, regard the fuel value obtained at this time as the real or relatively real fuel value in the driving mode;

S205, displaying the fuel value obtained this time.

S206. If the absolute value of the third difference between the fuel value obtained this time and the fuel value displayed last time is greater than or equal to the third preset value, the fuel value obtained this time is regarded as Unreal fuel value;

In this step, when the obtained fuel value is greater than or equal to the fuel value displayed by the display instrument, and the absolute value of their third difference is greater than or equal to 8% of the total volume L of the fuel tank, it is considered that the vehicle is running The road surface is an abnormal road, that is, a bumpy road or a sloped road. When the car is driving on a bumpy road or a road with a large slope, the fuel in the fuel tank will also follow the bumps or slopes. Compare the last displayed fuel value, if the absolute value of the third difference between them is greater than or equal to 8% of the total volume L of the fuel tank, it is considered that the fuel in the fuel tank is in a turbulent or inclined state, Then, the obtained fuel value is regarded as an unreal fuel value.

S207, do not display the fuel value obtained this time;

S208, determine whether the car is in the idle mode; if it is determined that the car is in the idle mode, then go to step S209; if it is determined that the car is not in the idle mode, go to step S211;

In this step, the idle mode refers to a state in which the vehicle power supply is IGN, the vehicle speed is zero, and the rotational speed is not zero.

S209, calculating the remaining fuel value every predetermined time;

The said every predetermined time can be set when the car leaves the factory, and can also be set by the driver according to the preference. For example, in this example, it can be set to calculate the remaining fuel value every 60s at every predetermined time. Specifically, please refer to FIG. 3. This step includes the following sub-steps:

S2091, collecting the pulse signal representing fuel consumption sent by the ECU every time period in the above-mentioned predetermined time period;

In this step, each time period of the ECU refers to the frequency at which the ECU sends a pulse signal. For example, in this step, the frequency is set to every 100ms, that is, the ECU sends a pulse signal indicating fuel consumption every 100ms, then in the above 60s During the period of time, the ECU will send out 600 pulses indicating fuel consumption.

S2092, according to the pulse signal sent by the ECU every period of time, analyze the number of single pulses and the fuel injection amount of each pulse in the pulse signal during the period of time;

Please refer to Figure 4, for example: in the pulse signal sent by the ECU in the first 100ms time period, the single pulse period is 2ms, the duty cycle is 50%, the number of pulses is 4, and each pulse represents the fuel injection volume of 36uL , then in the first 100ms time period, the fuel injection amount of the first pulse signal is: 36*4=144uL;

In the pulse signal sent by the ECU in the second time period of 100ms, the single pulse period is 2ms and the number of pulses is 6. Then, in the second time period of 100ms, the fuel injection amount of the second pulse signal is 36 *6=216uL;

And so on, until in the above 60s time period, 600 times of ECU's fuel injection amount in the 100ms time period has been counted.

S2093, obtaining cumulative fuel consumption according to the number of analyzed pulses and the fuel injection quantity of each pulse, wherein the cumulative fuel consumption is equal to the total number of pulses collected in the above predetermined time multiplied by the fuel injection quantity per unit pulse;

In this step, after completing the statistics of the fuel injection amount of the ECU in the 100ms time period for 600 times in the above 60s time period, the total accumulated fuel consumption of the ECU in the 100ms time period for the 600 times is:

The cumulative fuel consumption (uL) = the fuel injection volume within the first 100ms + the fuel injection volume within the second 100ms +... + the 600th fuel injection volume within 100ms = (the number of pulses within the first 100ms +The number of pulses in the second 100ms+...+the number of pulses in the Nth 100ms)*36uL.

S2094. Obtain the remaining fuel value according to the accumulated fuel consumption, wherein the remaining fuel value is equal to the previously displayed fuel value minus the accumulated fuel consumption;

The remaining fuel value (L) = the fuel value displayed by the previous display instrument - the accumulated fuel consumption.

In this way, the fuel consumed in each 60s period and the remaining fuel value in the fuel tank can be calculated.

S210. Display the remaining fuel value calculated each time above;

S211, determine whether the car is in the parking mode; if it is determined that the car is in the parking mode, then go to step S212; if it is determined that the car is not in the parking mode, then go to step S201;

The parking mode refers to a state in which the vehicle is stationary, the vehicle power is OFF or ACC, the vehicle speed is zero, and the vehicle speed is zero.

S212 , store the fuel value displayed last time and the fuel value collected last time since the car is in the parking mode.

The most recent fuel value collected from the stop mode refers to the fuel value collected by the fuel sensor, but the fuel value will not be able to pass the fuel value displayed by the display instrument in the future, or the fuel value collected by the fuel sensor, but The fuel value collected this time is an unreal fuel value. The collected fuel value is stored in the memory, in order to facilitate the recall of the stored fuel value when the car is powered on next time, so that it can be used to display the fuel value displayed by the instrument before the car is in the parking mode after the next power-on. , and after the next power-on, compare the fuel value collected by the sensor at the current time to judge whether the fuel value collected after the next power-on is within the predetermined range, if it is within the predetermined range, then judge the car last time The car is parked on a level road or close to a level road. If it is not within the predetermined range, it is judged that the car is parked on a non-level road, and the fuel value collected after the next power-on is regarded as unreal fuel and is not used for show.

In the embodiment of the present invention, when it is determined that the car is in the driving mode, the fuel value in the fuel tank of the car is obtained through the fuel sensor, and then the obtained fuel value is compared with the fuel value displayed by the display instrument. Within the set range, it is considered that the fuel value obtained this time is obtained on a relatively normal road surface, that is, it is not obtained when it is bumped or inclined, then the display instrument will display the fuel value obtained at this time; if If it is not within the preset range, it is considered that the fuel value obtained this time was obtained on an abnormal road, that is, when it was bumped or tilted, then the fuel value obtained this time is not displayed. When it is determined that the car is in the idle mode, the remaining fuel consumption value is displayed according to the mode of the idle mode in this embodiment. When the car is neither in the idle mode nor in the driving mode, it is considered that the car is in the stop state. Mode state, and then process the fuel consumption value according to different states. The display of the car fuel in this embodiment can more realistically display the fuel in the fuel tank of the car in different modes of the car, so that the car owner can grasp the real fuel of the car in real time when the car is in different modes, and it is more convenient for the car owner to follow up. Actions.

Please refer to FIG. 5. FIG. 5 is a block diagram of an embodiment of the apparatus for displaying the remaining fuel of an automobile according to the present invention. The device for displaying the remaining fuel of the vehicle in this embodiment includes:

The vehicle power-on module 101 is used to power on the IGN of the vehicle;

The first obtaining module 102 is configured to obtain the fuel value in the fuel tank after the vehicle is powered on with the IGN;

The first value-taking module 103 is used to call out the fuel value obtained before the last shutdown and power-off and the fuel value displayed by the display instrument from the storage area, and take the absolute value of the first difference between them;

a first judging module 104, configured to judge whether the absolute value of the first difference is less than a first preset value;

The second value taking module 105 is configured to take the fuel value obtained this time and the said The absolute value of the second difference of the fuel value obtained before the last stop and power failure;

The second judgment module 106 is configured to judge whether the absolute value of the second difference is less than or equal to a second preset value;

The real fuel value determination module 107 is used for determining in the second judgment module 106 that the absolute value of the second difference is less than or equal to the second preset value, and then the fuel value obtained this time is regarded as real fuel value;

The display module 108 is configured to display the obtained fuel value when the real fuel determination module 107 determines that the obtained fuel value is the real fuel value.

In this embodiment, the real fuel value determination module 107 is further configured to: when the first determination module 104 determines that the absolute value of the first difference is greater than or equal to the first preset value, then The fuel value obtained this time is regarded as an unreal fuel value;

The display module 108 is also used to display the fuel value displayed by the display instrument before the last stop and power failure;

The real fuel value determination module 107 is further configured to, when the second judgment module 106 judges that the absolute value of the second difference is greater than the second preset value, consider the fuel value obtained this time as yes. The fuel value obtained after the car is refueled;

The display module 108 is further configured to display the obtained fuel value after refueling this time.

In the embodiment of the present invention, through the above functional modules, the car owner can easily know the real or relatively real remaining fuel in the fuel tank of the car, and it is more convenient for the car owner to judge whether the next action needs to be performed according to the displayed real fuel.

The above are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, All are similarly included in the scope of patent protection of the present invention.

Claims (9)

1. A method for displaying the remaining fuel of an automobile, comprising the following steps: The car is powered on IGN; Get the fuel value in the fuel tank; The fuel value obtained before the last stop and power off and the fuel value displayed by the display instrument are called out from the storage area, and the absolute value of the first difference between them is taken; the storage area refers to the last time in the memory of the car Display the memory of the fuel value displayed by the instrument, as well as the fuel value collected by the sensor but not yet displayed or the fuel value collected but not displayed because it does not belong to the real fuel value; determining whether the absolute value of the first difference is less than a first preset value; If it is determined that the absolute value of the first difference is smaller than the first preset value, then take the second difference between the fuel value obtained this time and the fuel value obtained before the last shutdown and power failure the absolute value of ; determining whether the absolute value of the second difference is less than or equal to a second preset value; If it is determined that the absolute value of the second difference is less than or equal to the second preset value, the fuel value obtained this time is regarded as the real fuel value; Display the fuel value obtained this time; Determine whether the car is in driving mode; If it is determined that the car is in the driving mode, the fuel value of the fuel tank is obtained; Compare the fuel value obtained this time with the fuel value displayed last time; If the fuel value obtained this time is less than the fuel value displayed last time, and the absolute value of their third difference is less than a third preset value, the fuel value obtained at this time is regarded as the fuel value in the driving mode. true fuel value; Display the fuel value obtained this time. 2. The method for displaying remaining fuel of an automobile according to claim 1, wherein in the step of judging whether the absolute value of the first difference is less than the first preset value, the method further comprises: If it is determined that the absolute value of the first difference is greater than or equal to the first preset value, the fuel value obtained this time is regarded as an unreal fuel value; Display the fuel value displayed by the display instrument before the last stop and power failure. 3. The method for displaying the remaining fuel of a vehicle according to claim 2, wherein in the step of judging whether the absolute value of the second difference is less than or equal to the second preset value, the method further comprises: If it is determined that the absolute value of the second difference is greater than the second preset value, the fuel value obtained this time is regarded as the fuel value obtained after the vehicle is refueled; Displays the fuel value after refueling obtained this time. 4. The method for displaying the remaining fuel of an automobile as claimed in claim 1, wherein in the step of comparing the fuel value obtained this time with the fuel value displayed last time, further comprising: If the absolute value of the third difference between the fuel value obtained this time and the fuel value displayed last time is greater than or equal to the third preset value, the fuel value obtained this time is regarded as unreal fuel value; The fuel value obtained this time is not displayed. 5. The method for displaying the remaining fuel of an automobile as claimed in claim 4, wherein in the step of judging whether the automobile is in a driving mode, the method further comprises: If it is determined that the vehicle is in a non-driving mode, determining whether the vehicle is in an idle mode; If it is determined that the vehicle is in the idle mode, the remaining fuel value is calculated every predetermined time; Displays the remaining fuel value for each calculation. 6. The method for displaying the remaining fuel of an automobile as claimed in claim 5, wherein if it is judged that the automobile is in an idle mode, then in the step of calculating the remaining fuel value every predetermined time, comprising: Collecting the pulse signal representing fuel consumption sent by the engine ECU every time period in the above-mentioned predetermined time period; According to the pulse signal sent by the ECU in each period of time, analyze the number of single pulses and the fuel injection amount of each pulse in the pulse signal during this period of time; Accumulated fuel consumption is obtained according to the number of analyzed pulses and the fuel injection quantity of each pulse, wherein the accumulated fuel consumption is equal to the total number of pulses collected in the above predetermined time multiplied by the fuel injection quantity per unit pulse; The remaining fuel value is obtained according to the accumulated fuel consumption, wherein the remaining fuel value is equal to the previously displayed fuel value minus the accumulated fuel consumption. 7. The method for displaying the remaining fuel of an automobile according to claim 6, wherein in the step of judging whether the automobile is in an idle mode, the method further comprises: if it is determined that the automobile is in a non-idle mode, then judging that the automobile is in a non-idling mode. Whether it is in parking mode; If it is determined that the car is in the parking mode, the last displayed fuel value and the last collected fuel value until the car is in the parking mode are stored. 8. A device for displaying the remaining fuel of an automobile, comprising: The car power-on module is used to power on the car IGN; The first acquisition module is used to acquire the fuel value in the fuel tank after the vehicle is powered on with the IGN; The first value acquisition module is used to call out the fuel value obtained before the last stop and power off and the fuel value displayed by the display instrument from the storage area, and take the absolute value of the first difference between them; a first judging module for judging whether the absolute value of the first difference is less than a first preset value; The second value obtaining module is configured to obtain the difference between the fuel value obtained this time and the last time when the absolute value of the first difference is determined by the first judgment module to be less than the first preset value. The absolute value of the second difference of the fuel value obtained before the shutdown and power failure; a second judgment module, configured to judge whether the absolute value of the second difference is less than or equal to a second preset value; The real fuel value determination module is used for determining that the absolute value of the second difference is less than or equal to the second preset value in the second judgment module, and the fuel value obtained this time is regarded as the real fuel value ; The display module is used to display the fuel value obtained this time. 9. The device for displaying the remaining fuel of an automobile as claimed in claim 8, wherein: The real fuel value determination module is further configured to, when the first judgment module judges that the absolute value of the first difference is greater than or equal to the first preset value, then use the fuel value obtained this time A fuel value deemed untrue; The display module is also used to display the fuel value displayed by the display instrument before the last stop and power failure; The real fuel value determination module is further configured to, when the second judgment module judges that the absolute value of the second difference is greater than the second preset value, the fuel value obtained this time is regarded as being in the vehicle. The fuel value obtained after refueling; The display module is also used to display the fuel value obtained this time after refueling.

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