JP4984790B2 - Vehicle fuel meter control device - Google Patents

Description

  The present invention relates to a fuel meter control device for a vehicle, and more particularly to a fuel meter control device for a vehicle that can accurately display the fuel meter regardless of the traveling state of the vehicle.

  Conventionally, in a vehicle, in order to make the driver recognize the remaining amount of fuel in the fuel tank, a remaining fuel indicator, a so-called fuel meter, is provided in the instrumentation of the driver's seat.

  This fuel meter detects the remaining amount of fuel in the fuel tank with a float sensor provided in the fuel tank, takes this detection signal into the control device, and then uses the display signal displayed in the control device to perform a predetermined process. The remaining amount value is displayed with a needle or the like.

  In this fuel meter, the liquid level position of the fuel in the fuel tank is detected by a float sensor that uses a float (float). Therefore, depending on the vehicle's running condition (acceleration / deceleration, road gradient, etc.) There is a risk of detecting the remaining amount more or less than the remaining amount.

For this reason, for example, as shown in Patent Document 1 below, a fuel meter control device configured to reduce such a display error by delaying the display speed of the fuel meter is known.
Japanese Patent Laid-Open No. 2005-31030

By the way, the vehicle receives the front-rear and left-right directions G according to various traveling states. Accordingly, the fuel in the fuel tank also swings back and forth and left and right in the tank.
For this reason, the liquid level of the fuel also largely fluctuates up and down, and the float of the float sensor also moves greatly in the vertical direction.

  At this time, the fuel meter control device calculates the fuel meter display amount by estimating the true value of the fuel remaining amount in the fuel tank from the average value of the detected values detected a predetermined number of times. Depending on the amount and the running state, a predetermined tendency occurs in the detection value of the float sensor, and thus there may be a deviation between the value during steady running and the value during acceleration / deceleration running.

  The schematic diagram of FIG. 6 is a schematic diagram for explaining the predetermined tendency. This schematic diagram shows the vertical movement of the float when the float sensor is installed at a substantially central position in a substantially square cubic fuel tank. A schematic diagram in the case of more than 1/2, and a lower diagram is a schematic diagram in a case where the remaining amount of fuel is less than about 1/2 of the fuel tank capacity.

  When the remaining amount of fuel is more than about 1/2, that is, when the fuel is larger than the air in the tank, if the fuel tank swings greatly in the front-rear direction, the air moves to the front-rear position of the fuel tank, As a result, the central liquid surface position rises upward from the steady state position, and the float moves upward.

  On the other hand, when the remaining amount of fuel is more than about 1/2, that is, when the fuel is less than the air in the tank, if the fuel tank swings greatly in the front-rear direction, the fuel is conversely moved back and forth in the fuel tank. As a result, the center liquid level position falls below the steady state position, and the float moves downward.

  From the tendency of the float, as shown in the fuel display characteristic diagram of FIG. 7, during acceleration / deceleration running shown in (b), the display value is larger than the value during steady running shown in (a) with a large amount of remaining fuel. This results in a deviation in that the display value is displayed less than the value during steady running shown in (a) when the remaining amount of fuel is low.

  For this deviation, even if the display speed is lowered as in the above-mentioned Patent Document 1, the basic detection value itself has a large deviation from the true value. It is not possible to take measures.

  In view of this, the present invention provides a fuel meter control device for a vehicle that displays the remaining amount of fuel in the fuel tank, which fluctuates depending on the traveling state, as close as possible to the value during steady traveling, and displays a more accurate remaining fuel amount. An object of the present invention is to provide a fuel meter control device capable of performing

A fuel meter control device for a vehicle according to the present invention comprises a fuel remaining amount detecting means for detecting a remaining amount of fuel in a fuel tank, and a fuel remaining amount detecting means based on a change in the detected signal upon receiving a detection signal from the remaining fuel amount detecting means. In a fuel meter control device for a vehicle comprising a fuel remaining amount display means for displaying the amount of fuel, the fuel obtained from the fuel remaining amount detecting means based on a detection signal for the remaining amount of fuel and a detection signal for the running state of the vehicle Correction means for correcting the display amount of the remaining amount display means, and in a state where the remaining amount of fuel in the fuel tank is greater than a predetermined value near the half of the fuel tank, the remaining fuel amount obtained from the detection signal of the remaining fuel amount detecting means The display amount of the amount display means is corrected to decrease .

According to the above configuration, the display amount of the remaining fuel amount display unit is corrected by the correcting unit based on the remaining fuel amount and the running state of the vehicle.
For this reason, the amount of deviation between the detected value that changes in accordance with the running state of the vehicle and the detected value during steady running can be reduced by correction, and a value closer to the value during steady running can be displayed. .
Further, according to the above configuration, when the remaining amount of fuel in the fuel tank is large, the display amount is corrected to decrease.
For this reason, when the remaining amount of fuel is large, even if the detected value of the remaining amount of fuel rises above the value at the time of steady running due to the running state of the vehicle, the display amount can be made closer to the value at the time of steady running. it can.
Therefore, regardless of the running state of the vehicle, the fuel remaining amount display means can be displayed with a value closer to the value during steady running.

The fuel meter that is the fuel remaining amount display means may be an analog type with a needle display or a digital type with a liquid crystal display.
Further, the traveling state of the vehicle may be detected by a lateral G sensor, a front-rear G sensor, a gradient sensor, or the like, or may be detected by an operation system sensor such as a steering angle sensor or a pedal sensor.

In one embodiment of the present invention, a moving average that calculates an average of detection values included in a detection signal of the fuel remaining amount detection means every predetermined number of times, or continuously calculates an average of detection values every predetermined period. In this averaging process, the remaining fuel amount is calculated, and the running state of the vehicle is detected based on the change of the detection value for each detection time .
According to the above configuration, the traveling state of the vehicle is detected by the fluctuation of the liquid level in the fuel tank.
For this reason, it is possible to perform correction control of the fuel meter only by detecting the amplitude of the detection signal of the remaining fuel amount detection means without newly providing a front-rear G sensor or a lateral G sensor.
Therefore, by making the fuel remaining amount detecting means also function as a detecting means for detecting the running state, it is possible to correct the deviation amount of the detection value of the fuel remaining amount detecting means without incurring costs.

In one embodiment of the present invention, when the remaining amount of fuel in the fuel tank is less than a predetermined value in the vicinity of the half of the fuel tank, the display amount of the remaining fuel amount display means obtained from the detection signal of the remaining fuel amount detection means Is corrected to increase.
According to the above configuration, when the remaining amount of fuel in the fuel tank is small, the display amount is corrected to increase.
For this reason, when the remaining amount of fuel is low, even if the detected value of the remaining amount of fuel falls below the value at the time of steady running due to the running state of the vehicle, the display amount can be made closer to the value at the time of steady running. it can.
Therefore, regardless of the traveling state of the vehicle, the fuel remaining amount display means can be displayed with a value close to the value during steady traveling.

  Note that these correction directions may be changed according to the shape of each fuel tank.

  In one embodiment of the present invention, when the fluctuation of the running state of the vehicle is large, the correction amount of the display amount of the fuel remaining amount display means obtained from the detection signal of the fuel remaining amount detecting means is larger than when the fluctuation is small. It is a large setting.

According to the above configuration, the correction amount of the display amount of the remaining fuel amount display means changes according to the fluctuation amount of the running state of the vehicle.
For this reason, the amount of deviation between the detected value that changes in accordance with the amount of change in the running state and the value during steady running can be reliably reduced by changing the correction amount.
Therefore, the fuel remaining amount display means can be displayed with a value closer to the value during steady running.
In the case where the running state of the vehicle is detected by the amplitude of the detection signal of the fuel remaining amount detecting means, the amount of variation is detected by the amplitude length or amplitude frequency of the amplitude.

In one embodiment of the present invention, there is provided display speed changing means for reducing the display speed of the remaining fuel amount display means.
According to the above configuration, the display speed is reduced by the display speed changing means, so that the fuel meter needle and the like gradually move to the display target value.
For this reason, rapid fluctuations in the fuel meter needle and the like can be suppressed, and the driver can be prevented from feeling uncomfortable.
Therefore, the influence of disturbance on the fuel meter display can be reduced and the accuracy of the display value can be improved.

In one embodiment of the present invention, the fuel consumption amount detecting means for detecting the fuel consumption amount is provided, and the display speed changing means is based on a detection signal from the fuel consumption amount detecting means when the fuel consumption amount is small. Is configured to reduce the display speed when there are many.
According to the above configuration, when the fuel consumption is low, the display speed is reduced, and when the fuel consumption is high, the display speed is increased. Therefore, when the fuel consumption is large, the change in the liquid level of the fuel tank is more accurately reflected.
Therefore, when the fuel consumption is small, the fluctuation of the needle of the fuel meter is suppressed so that the driver does not feel uncomfortable. When the fuel consumption is large, the remaining amount of fuel is reduced for the driver. Can be recognized at an early stage, and the risk of running out of gas can be avoided.

According to the present invention, the amount of deviation between the detected value that changes according to the running state of the vehicle and the detected value during steady running can be reduced by correction, and a value closer to the value during steady running is displayed. be able to.
Therefore, in the fuel meter control device of the vehicle, the display amount of the fuel remaining amount of the fuel tank that varies depending on the traveling state can be displayed as close as possible to the value at the time of steady traveling, thereby displaying the more accurate fuel remaining amount.
Further, when the remaining amount of fuel in the fuel tank is large, the display amount is corrected to decrease.
For this reason, when the remaining amount of fuel is large, even if the detected value of the remaining amount of fuel rises above the value at the time of steady running due to the running state of the vehicle, the display amount can be made closer to the value at the time of steady running. it can.
Therefore, regardless of the running state of the vehicle, the fuel remaining amount display means can be displayed with a value closer to the value during steady running.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a system block diagram relating to a fuel meter control device for a vehicle according to a first embodiment.
The fuel meter control device 1 includes a float sensor 2 installed in a fuel tank T (see FIG. 2), a fuel meter control unit 3 that receives a detection signal from the float sensor 2 and calculates a display signal, and a driver's seat. And a fuel meter main body 4 that receives a display signal from the fuel meter control unit 3 and displays the remaining amount of fuel.

  In addition, four wheel speed sensors 5a, 5b, 5c, and 5d, a vehicle speed detection unit 6 that receives the detection signals from the wheel speed sensors 5a, 5b, 5c, and 5d and calculates a vehicle speed, and an engine Upon receipt of detection signals from an airflow sensor 7 for detecting the amount of air taken into (not shown), an engine speed sensor 8 for detecting the engine speed, a vehicle speed signal, an airflow sensor, an engine speed sensor, etc. An engine control unit 9 that calculates a fuel injection amount and the like, and a fuel injection valve 10 that actually injects fuel into the engine based on the calculated fuel injection amount are provided.

  In the vehicle speed detection unit 6 described above, the wheel speeds of the four wheels are detected from the wheel speed sensors 5a, 5b, 5c, and 5d, and the vehicle speed (body speed) is calculated from the detected wheel speeds. For example, the vehicle speed (vehicle speed) is calculated from the average value of three values of four detection signals excluding the maximum value.

  In the engine control unit 9 described above, the fuel injection amount is calculated based on detection signals from sensors that detect engine conditions such as the airflow sensor 7 and the engine speed sensor 8.

  In addition to the detection signal of the float sensor 2 described above, the vehicle speed and the fuel injection amount are input from the engine control unit 9 to the fuel meter control unit 3 described above.

  The fuel meter control unit 3 takes in the detection signal of the float sensor 2 and performs target value calculation processing and time constant processing (display speed processing), and then outputs them as a display signal to the fuel meter main body 4.

  Here, the time constant process means that the liquid level position (liquid level) of the fuel tank T, which fluctuates depending on the traveling state of the vehicle, etc., is displayed accurately without the influence of disturbance. , Instead of directly changing to the remaining fuel value (target value), performing control (so-called “smoothing control”) for gradually increasing the display speed so as to gradually approach the remaining fuel value (target value). .

  The time constant needs to be set as appropriate depending on the capacity of the fuel tank T and the fuel consumption. For example, the capacity of the fuel tank T is 60 liters, the fuel consumption is 5 km / liter, and the needle swing angle of the fuel meter body 4 is When the angle is 90 °, the time constant is 30 seconds / 1 ° (30 seconds is required to move the needle by 1 °) to 3000 seconds / 1 ° (3000 seconds to move the needle by 1 °) It is conceivable to set an appropriate value within the range of

  The fuel meter control unit 3 of the present embodiment has about three patterns of time constants as will be described later, and the three patterns of time constants are switched according to fueling, fuel consumption, and the like.

  Next, the float sensor 2 that detects the remaining amount of fuel in the fuel tank T will be described. FIG. 2 is a schematic diagram showing the float sensor 2.

As shown in this schematic diagram, the float sensor 2 is installed at a substantially central position in the fuel tank T, and includes a float 21, an arm 22, and a sensor body 23.
The float 21 is formed of a rubber cylindrical member or the like, and is installed in a state of floating on the fuel level W. The float 21 moves up and down in the fuel tank T in accordance with increase or decrease in the remaining amount of fuel. It is configured as follows.

  The arm 22 is formed of a long rod member, and one end is pivotally attached to the float 21 and the other end is pivotally attached to the sensor body 23. It is configured to swing in the vertical direction around a rotation fulcrum 22a pivotally attached to the sensor body 23.

  The sensor body 23 pivotally supports the arm 22, detects the swing position of the arm 22, and outputs the detected value to the aforementioned fuel meter control unit 3 as a detection signal.

  As described above, since the float sensor 2 detects the liquid level position of the fuel by the float 21, the detection value varies depending on the running state of the vehicle. In order to suppress the variation as much as possible, the float sensor 2 has a predetermined number of times. An average process such as a moving average is performed to calculate the average of the detected values or to continuously calculate the average of the detected values for each fixed period.

  However, when the traveling state in which the front and rear G and the lateral G repeatedly act continues for a long period of time, the detected value of the float sensor 2 is obtained in accordance with the remaining amount of fuel in the fuel tank T even if such averaging processing is performed. Since a predetermined tendency occurs, it is greatly deviated from the true value, and an accurate remaining amount display cannot be performed.

  Although this predetermined tendency changes depending on the shape of the fuel tank T and the like, it is basically determined according to the ratio of the fuel and air in the fuel tank T as shown in the schematic diagram of FIG. FIG. 6 is a schematic diagram showing the movement of the float 21 when the float sensor 2 is installed at a substantially central position in the fuel tank T having a square cubic shape.

  When the remaining amount of fuel is greater than ½ of the fuel tank capacity (upper stage), the amount of air K located above the fuel tank T is smaller than the amount of fuel N. For this reason, both when the front G acts and when the rear G acts, the air K moves forward or backward, and as a result, the position of the float 21 moves upward.

  Thus, when the remaining amount of fuel is large, the float 21 moves upward regardless of how the fuel tank T swings. Therefore, even if the detected value is averaged, the fuel is more than the true value. A large amount of remaining amount will be detected.

  On the other hand, when the remaining amount of fuel is less than ½ of the fuel tank capacity (lower stage), the amount of air K located from the upper part to the center of the fuel tank T is larger than the amount of fuel N. For this reason, both when the front G acts and when the rear G acts, the fuel N moves forward or backward, and as a result, the position of the float 21 moves downward.

  As described above, when the remaining amount of fuel is small, the float 21 moves downward regardless of how the fuel tank T swings. Therefore, even if the detected values are averaged, the remaining amount of fuel exceeds the true value. A small amount will be displayed.

  Since there is such a tendency of the float sensor 2, as shown in the fuel display characteristic diagram of FIG. 7, in the case of acceleration / deceleration running shown in (b), as in the case of steady running in (a). In addition, the needle of the fuel meter body 4 does not descend linearly according to the travel distance, but falls relatively slowly from F to around 1/2 (L1), and from around 1/2 to E It will drop rapidly (L2).

  The display characteristics as shown in (b) give the driver a sense of incongruity, and may also impair the reliability of the display amount of the fuel meter body 4.

  Therefore, in the present embodiment, the amount of deviation s between the display characteristics during acceleration / deceleration running and the display characteristics during steady running is reduced by the control flow described below so that an accurate fuel remaining amount is displayed. Yes. FIG. 3 is a control flowchart of the present embodiment.

  First, in step S 1, the vehicle speed detected by the vehicle speed detection unit 6, the fuel injection amount calculated by the engine control unit 9, and the fuel remaining amount detected by the float sensor 2 are read into the fuel meter control unit 3. .

  Next, it is determined whether refueling has been performed in step S2. Specifically, the vehicle speed is 0, and the previous fuel remaining amount and the current fuel remaining amount are compared to determine whether there has been an increase of 8 liters or more. Note that the threshold value for determining the refueling may be 8 liters or less, but it is desirable to set the value so that the float sensor 2 does not erroneously determine the refueling due to the traveling state or the like.

  If it is determined YES in step S2, that is, if it is considered that refueling has been performed while the vehicle is stopped, the driver or the like has a request to confirm refueling by promptly raising the needle of the fuel meter body 4. In step S3, the first time constant having the fastest display speed is set.

  On the other hand, if NO is determined in step S2, the process proceeds to step S4 to calculate the display target value. Specifically, the display target value is calculated according to the control flow for display target value calculation shown in FIG.

  Here, by calculating the display target value, the above-described deviation amount s between the display characteristic during steady traveling and the display characteristic during acceleration / deceleration traveling is reduced.

  In the control flow for calculating the display target value shown in FIG. 4, first, the detected value of the float sensor 2 is averaged in step S11. As described above, this averaging process is performed in order to prevent the fuel level change in the fuel tank T from being displayed on the fuel meter body 4 as much as possible. By this averaging process, a sensor value (a value obtained by averaging detected values) of the remaining fuel amount is calculated.

  Next, in step S12, a determination process for the swing amount of the float sensor 2 is performed. In this swing amount determination process, it is determined whether or not the detected value of the float sensor 2 is greatly swung (changed) every detection time, and it is determined whether or not the vehicle is in an acceleration / deceleration travel or the like. To do. Further, the amount of swing (the width of change and the frequency of change) is also detected, and the degree of acceleration / deceleration of the vehicle is determined according to the amount of swing.

  Next, a correction value is calculated in step S13. This correction value is calculated by an average value correction process MAP shown in FIG. This MAP is configured such that the vertical axis is the swing amount of the float sensor 2 and the horizontal axis is the sensor value, and each square has a correction value at each value.

  The correction value for each square prescribes a value for correcting the F side (full tank side) in the minus direction and correcting the E side (color side) in the plus direction around ½ of the sensor value. Further, the correction values of 3/4 and 1/4 of the sensor value are set to be the largest. Further, the absolute value of the correction value is set so as to increase in proportion to the magnitude of the swing amount. The unit of each correction value is liters.

  For example, when it is determined that the fuel tank T has a full tank capacity of 60 liters, the sensor value is 45 liters, and the swing amount is medium, 45 liters of the 60 liters are calculated as the sensor value. A vertical square having a value of 3/4 is selected, and since the amount of oscillation is medium, the third square from the bottom of this vertical square is selected. With such a calculation process, the correction value “−4” is calculated.

  Next, sensor value correction processing is performed in step S14. This sensor value correction process is performed by adding a correction value to the calculated sensor value. For example, in the above-described example, “41” liter is calculated by adding the correction value of “−4” liter to the sensor value of 45 liter.

  Finally, in step S15, a display target value is determined. In the above example, “41 liters” is determined as the display target value.

In this way, in the control flow for calculating the display target value, the display target value is determined by adding the correction value to the value (sensor value) detected by the float sensor 2.
By calculating the display target value, it is possible to obtain substantially the same value as the detected value (true value) during steady running.

  Thereafter, the process returns to the control flow of FIG. 3 and proceeds to step S5. In step S5, it is determined whether the fuel injection amount is equal to or less than a set value.

  If the determination in step S5 is YES, that is, if it is determined that the fuel consumption is low, even if the display speed of the fuel meter body 4 is delayed, the motivation of refueling to the driver will be affected. In addition, since it is necessary to suppress the fluctuation of the needle of the fuel meter main body 4 due to the influence of disturbance such as the running state, the process proceeds to step S6 and the second time constant having the slowest display speed is set.

  If NO is determined in the determination in step S5, that is, if it is determined that the amount of fuel consumption is large, the display of the needle of the fuel meter body 4 is speeded up to ensure the followability of the fuel consumption. Therefore, the process proceeds to step S7, and a third time constant having higher responsiveness (faster display speed) than the second time constant is set.

  Then, in step S8, which is the final step, the fuel meter main body 4 is driven and controlled so that the needle displays the aforementioned display target value based on the time constant set in any of steps S3, S6, and S7. To do.

  In this control flow, the second time constant and the third time constant are separately set as fixed values, but the time constant value is linearly increased as the fuel injection amount increases. Also good.

Next, the function and effect of the present embodiment configured as described above will be described in detail.
The vehicle fuel meter control device 1 of this embodiment calculates a correction value based on the detection signal of the float sensor 2 and the amplitude of the detection signal (step S13), and corrects the sensor value with the correction value. (Step S14), the display target value is determined (step S15).
Thereby, the display amount of the fuel meter main body 4 is corrected based on the remaining amount of fuel and its amplitude.
For this reason, the amount of deviation s between the detected value that changes according to the running state of the vehicle and the value during steady running can be reduced by correction, and a value closer to the value during steady running can be displayed. .

  Therefore, in the fuel meter control device of the vehicle, the fuel remaining amount display amount of the fuel tank T that varies depending on the traveling state is brought as close as possible to the value at the time of steady traveling, and a more accurate fuel remaining amount is displayed on the fuel meter body 4 Can be made.

In the present embodiment, the correction value is calculated using MAP. However, the correction value may be calculated linearly by multiplying by a coefficient or the like.
In this embodiment, the running state of the vehicle is detected by the amplitude of the detection signal of the float sensor 2.
For this reason, the correction control of the fuel meter control device 1 can be performed only by detecting the amplitude of the detection signal of the float sensor 2 without newly providing front and rear G sensors and lateral G sensors.
Therefore, by causing the float sensor 2 to also function as a detecting means for detecting the traveling state, the sensor value deviation s of the float sensor 2 can be corrected without incurring costs.

  In addition, when detecting the driving | running | working state of a vehicle more correctly, you may provide a front-back G sensor and a lateral G sensor.

In this embodiment, the sensor value of the float sensor 2 is corrected to decrease in a state where the remaining amount of fuel in the fuel tank T is larger than ½ of the fuel tank T capacity (see FIG. 5).
As a result, when the remaining amount of fuel in the fuel tank T is large, the display amount is corrected to decrease. Therefore, when the remaining amount of fuel is large, the detected value of the remaining amount of fuel depends on the traveling state of the vehicle. Even if it rises, the display amount can be made closer to the value during steady running.
Therefore, the fuel meter main body 4 can be displayed with a value closer to the value during steady running regardless of the running state of the vehicle.

In this embodiment, the sensor value of the float sensor 2 is corrected to increase in a state where the remaining amount of fuel in the fuel tank T is less than 1/2 of the fuel tank capacity (see FIG. 5).
As a result, when the remaining amount of fuel in the fuel tank T is small, the display amount is corrected to be increased. Therefore, when the remaining amount of fuel is small, the detected value of the remaining amount of fuel depends on the running state of the vehicle. Even if it descends, the display amount can be made closer to the value during steady running.
Therefore, the fuel meter main body 4 can be displayed with a value close to the value during steady running regardless of the running state of the vehicle.

  In this embodiment, when the amplitude of the detection signal of the float sensor 2 is large, the correction amount is set larger than when the amplitude is small (see FIG. 5).

As a result, the amount of deviation between the detected value that changes in accordance with the amount of change in the running state of the vehicle and the value during steady running can be reliably reduced by changing the correction amount.
Therefore, the fuel meter body 4 can be displayed with a value closer to the value during steady running.

  In this embodiment, time constant processing (step S8) for reducing the display speed of the fuel meter body 4 is performed.

As a result, the needle of the fuel meter main body 4 gradually moves to the display target value, so that rapid fluctuations in the needle of the fuel meter main body 4 are suppressed, and it is possible to prevent the driver from feeling uncomfortable.
Therefore, it is possible to reduce the influence of disturbance on the display of the fuel meter main body 4 and improve the display accuracy.

Further, in this embodiment, the engine control unit 9 for calculating the fuel consumption is provided, and the fuel meter control unit 3 is based on the calculation signal from the engine control unit 9 when the fuel consumption is small when the fuel consumption is small. A time constant (second time constant) for reducing the display speed is set (step S6).
As a result, the display speed is reduced when the fuel consumption is low (step S6), and the display speed is increased when the fuel consumption is high (step S7). Therefore, the needle of the fuel meter body 4 has low fuel consumption. Sometimes, it becomes difficult to be affected by the fluctuation of the liquid level of the fuel tank T, and when the fuel consumption is large, the fluctuation of the liquid level of the fuel tank T is reflected more accurately.
Therefore, when the fuel consumption is small, the fluctuation of the needle of the fuel meter body 4 is suppressed and the driver does not feel uncomfortable. When the fuel consumption is large, the remaining amount of fuel is reduced for the driver. Can be recognized at an early stage, and the risk of running out of gas can be avoided.

  In the above embodiment, the fuel meter main body 4 has been described as an analog type with a needle display, but the present invention may be implemented with a digital type fuel meter with a liquid crystal display.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The fuel remaining amount detecting means of the present invention corresponds to the float sensor 2 of the embodiment,
Hereinafter, similarly, the remaining fuel amount display means corresponds to the fuel meter main body 4,
The correction means corresponds to the fuel meter control unit 3, but the present invention is not limited to the above-described embodiment, and includes an embodiment applied to a fuel meter control device of any vehicle.

The system block diagram regarding the fuel meter control apparatus of 1st embodiment. Schematic schematic diagram of a float sensor. The control flowchart of 1st embodiment. The control flowchart of display target value calculation. The figure which showed the average value correction process MAP. The schematic diagram explaining the predetermined tendency of a float sensor. It is the figure which showed the fuel display characteristic figure, (a) is the figure which showed the characteristic at the time of steady driving, (b) the figure which showed the characteristic at the time of acceleration / deceleration driving.

DESCRIPTION OF SYMBOLS 1 ... Fuel meter control apparatus 2 ... Float sensor 3 ... Fuel meter control unit 4 ... Fuel meter main body

Claims (6)

Fuel remaining amount detecting means for detecting the remaining amount of fuel in the fuel tank, and fuel remaining amount displaying means for receiving a detection signal of the remaining fuel amount detecting means and displaying the remaining amount of fuel based on a change in the detected signal In a vehicle fuel meter control device comprising:
Correction means for correcting a display amount of the fuel remaining amount display means obtained from the fuel remaining amount detecting means based on a detection signal of the remaining amount of fuel and a detection signal of the running state of the vehicle ;
When the amount of remaining fuel in the fuel tank is greater than a predetermined value near the half of the fuel tank, the display amount of the remaining fuel amount display means obtained from the detection signal of the remaining fuel amount detecting means is corrected to decrease. Fuel meter control device. By calculating the average of the detection values included in the detection signal of the fuel remaining amount detection means every predetermined number of times, or by calculating the moving average that continuously calculates the average of the detection values for each fixed period, the fuel remaining amount Is calculated,
The vehicle fuel meter control device according to claim 1 , wherein a traveling state of the vehicle is detected based on a change of the detection value every detection time . 3. The display amount of the fuel remaining amount display means obtained from the detection signal of the fuel remaining amount detecting means is increased and corrected when the fuel remaining amount in the fuel tank is smaller than a predetermined value near the half of the fuel tank. The vehicle fuel meter control device described. If the variation of the running state of the vehicle is large, any claim 1-3 in which fluctuation is set to a large correction amount of the labeled amount of the fuel quantity display means to be determined from the detection signal of the fuel level detecting unit than smaller A fuel meter control device for a vehicle according to claim 1. The fuel meter control device for a vehicle according to any one of claims 1 to 4 , further comprising display speed changing means for reducing a display speed of the remaining fuel amount display means. A fuel consumption detecting means for detecting the fuel consumption,
6. The vehicle according to claim 5, wherein the display speed changing means is configured to reduce the display speed when the fuel consumption is small based on the detection signal from the fuel consumption detection means when the fuel consumption is small. Fuel meter control device.

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