JPH07187296A - Oil feeder - Google Patents

Abstract

PURPOSE:To shorten an oil-feeding time by estimating an accurate amount of oil flow from information on bubbles that have complex behavior. CONSTITUTION:An oil-feeding nozzle 8 is provided with a bubble level detecting means 21 to detect a bubble level (LB) over the full level (LF) in the tank, and oil level setting means 22 to set a full oil level (LF). An oil-feeding means 4 is provided with a controller 24 to continuously control an oil flow rate (Q). The controller 24 has a fuzzy inference device 25 to determine an out feed rate (Q) by applying fuzzy inference using a deviation (u) of a bubble level (LB) against the full oil level (LF) and the variation DELTAu with time, and an adjusting means 26 to change the oil feed rate (Q) based on the determined oil feed rate (Q). Variations in the bubble level are directly monitored, and oil is continuously fed at the maximum flow rate (Q) that prevents the bubble from overflowing through an oil feed opening 23a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device for supplying an oil liquid such as gasoline to a vehicle at a gas supply station.

[0002]

2. Description of the Related Art In a gas station, when refueling a fuel tank of a vehicle at a capacity limit, that is, so-called full-tank refueling, a refueling operator first starts from a nozzle of the refueling device main body to fit an oil type suitable for the vehicle. The oil supply nozzle is removed and the pump that supplies the oil liquid to the oil supply nozzle is driven. Then, after that, the tip of the refueling nozzle is inserted and held in the refueling port of the refueling vehicle, and the operation lever of the refueling nozzle is operated to start the discharge of the oil liquid by opening the valve provided in the refueling nozzle. Holds this operating lever on a lever hooking portion provided on the oil supply nozzle to perform full tank oil supply. As a result, the refueling operator can perform various incidental service work such as window cleaning and ashtray cleaning while the full tank refueling progresses.

When refueling progresses and the liquid level in the fuel tank of the vehicle rises, there is a conventional refueling nozzle equipped with a mechanical automatic valve closing mechanism that utilizes displacement of the diaphragm due to negative pressure. As a result, the bubble surface generated on the liquid surface in the fuel tank with the refueling reaches the tip of the refueling nozzle. And
When the air communication port provided at the tip of the refueling nozzle cylinder is closed by this bubble surface to compensate the negative pressure, the diaphragm of the negative pressure chamber provided in communication with the air communication port and the negative pressure generating portion is bent. The valve provided on the fueling nozzle main body is closed in spite of the valve opening operation state in which the operation lever is held by the lever hooking portion.

However, in full tank refueling by means of the refueling nozzle provided with this automatic valve closing mechanism, refueling is completed when the bubble surface generated on the liquid level in the fuel tank closes the atmosphere communication port provided at the tip of the refueling nozzle. As it does, accurate full tank refueling is not performed. Therefore, in order to perform accurate full tank refueling, the operator repeatedly opens and closes the valve by manually operating the operating lever after the valve of the refueling nozzle is forcibly closed by the operation of the automatic valve closing mechanism, and the oil liquid is supplied from the refueling port. In order to prevent the oil from overflowing, a small amount of additional oil had to be added to reduce the oil flow rate, which was troublesome.

Therefore, instead of the fueling nozzle having the automatic valve closing mechanism, sensors for detecting the liquid surface and the bubble surface are provided in the fueling nozzle, and the pump and the fueling nozzle upstream side are provided based on the detection outputs of these sensors. An oil supply device with an automatic full oil supply control function that drives and controls an electromagnetic valve provided in the vehicle to perform accurate full oil supply has been considered. In this refueling device, when the sensor detects that the bubble surface generated on the liquid surface in the fuel tank has reached the tip of the refueling nozzle after the start of full refueling, the sensor receives the detection signal output from the sensor. A solenoid valve provided on the upstream side of the pump and the fueling nozzle is driven, and the supply of the oil liquid to the fueling nozzle is temporarily stopped. Then, after waiting for the elapse of a predetermined time for waiting for the bubbles to disappear (hereinafter referred to as the bubble disappearance waiting time), the pump or solenoid valve is turned on, provided that no detection signal is output from the sensor. By driving, the supply of the oil liquid to the supply nozzle is started.

After that, when a predetermined full tank determination condition is satisfied while repeating the so-called automatic additional refueling, which is the supply / stop of the oil liquid to the refueling nozzle based on the input of the detection signal from the sensor, The pump or solenoid valve is stopped or kept closed to finish the full tank refueling. The conditions for determining whether the tank is full are whether or not the additional supply amount per time due to the supply / stop of the oil liquid to the oil supply nozzle based on the input of the detection signal from the sensor is below the specified amount, Conditions such as whether or not it has been reached, whether or not the detection signal from the sensor is continuously output for over a predetermined time, and conditions that combine these are considered.

FIG. 8 and FIG. 9 show a concrete example of a conventional oil supply device 1 having an automatic full tank oil supply control function. In these figures, FIG. 8 is a schematic configuration diagram of the oil supply device 1, and FIG. 9 is a graph showing the relationship between the output of the liquid level sensor and the discharge flow rate. In FIG. 8, reference numeral 1a is a main body, 2 is a fixed pipe, 3
Is a pump unit in which devices such as a pump and an air separator are integrally configured, 4 is a pump driving motor, 5 is a flow meter, 6 is a flow rate pulse transmitter, 7 is an oil supply hose, 8 is an oil supply nozzle, and 8a is Refueling nozzle cylinder tip, 8b is refueling nozzle 8
An operation lever for opening and closing a valve (not shown) provided in the, and a liquid level sensor 9 that outputs a signal by detecting that the liquid / foam surface provided in the refueling nozzle barrel tip 8a has reached the nozzle barrel tip 8a 10 is a nozzle hook, 11 is a nozzle hook 10
Nozzle switch that opens and closes depending on whether the fueling nozzle 8 is hung on or off, 12 is a control device, and 13 is a fueling amount indicator.

The control device 12 controls the nozzle switch 1 by removing the refueling nozzle 8 from the nozzle hook 10.
When 1 is closed, the pump motor 4 is driven and the oil supply amount indicator 13 is reset to zero. When the refueling nozzle 8 is inserted into the refueling port and the operation lever 8b is opened,
Flow rate pulses output from a flow rate pulse transmitter 6 attached to the flow meter 5 are counted to calculate a refueling amount, and the refueling amount display 13 displays the value. Further, during refueling by operating the refueling nozzle 8, the control device 12, for example, as shown in FIG.
The automatic full tank refueling control is performed as shown in.

In FIG. 9, the oil supply nozzle 8 is at time t1.
When the operating lever 8b is opened, the discharge of the oil liquid is started from the nozzle barrel tip 8a, and the steady discharge state is reached at time t2. P ₀ indicates a steady discharge flow rate. After that, refueling proceeds, the liquid level in the tank rises, and, for example, when the bubbles generated on the liquid level in the tank at the time of refueling reach the nozzle barrel tip 8a at the time of refueling, the liquid level sensor 9 It turns on and outputs a detection signal. When the detection signal from the liquid level sensor 9 is input, the control device 12 stops the pump driving motor 4 and, depending on the output state of the flow rate pulse output from the flow rate pulse transmitter 6, the control device 12 controls the pump driving motor 4 Check whether refueling has stopped depending on whether the overshoot amount due to the stop in step 1 has run out.

Next, at the time t4 when the stop of refueling is confirmed, the control device 12 starts measuring a predetermined bubble disappearance waiting time T1. And the bubble disappearance waiting time T1
At a time point t5 after the lapse of time, the control device 12 sets the pump drive motor 4 to, for example, 1/2 of the steady operation amount, provided that the detection signal is not output from the liquid level sensor 9.
The additional flow rate m is started by driving by reducing the flow rate with the operation amount of. The control device 12 controls the additional refueling m (in FIG. 9, m
The presence or absence of the detection signal from the liquid level sensor 9 is confirmed even during the progress of 1). Then, for example, at time t6, the liquid level sensor 9
If a detection signal is output from the controller 12,
Similarly, the pump driving motor 4 is stopped, and it is confirmed by the output state of the flow rate pulse output from the flow rate pulse transmitter 6 whether or not the overshoot amount due to the stop of the pump driving motor 4 has run out. At time t7 when it is confirmed that refueling has stopped due to this overshooting amount, the refueling device compares whether the additional refueling amount m1 is smaller than a predetermined refueling amount PK for a predetermined full tank determination. ,
If it is smaller, the pump drive motor 4 is held in the stopped state to complete the automatic full oil supply, while the additional oil supply amount m
When 1 is equal to or greater than the determined refueling amount PK, the measurement of the bubble disappearance waiting time T2 is started at time t7.

Then, the controller 12 keeps the pump drive motor 4 steady again on condition that the detection signal is not output from the liquid level sensor 9 at the time t8 when the measurement of the bubble disappearance waiting time T2 is completed. It drives with the operating amount of 1/2 of the operating amount, and next additional refueling m2 is started. Thereafter, this additional refueling m is repeated until the full tank determination condition that the additional refueling amount m is smaller than the determined refueling amount PK is satisfied. At this time, the number of times of additional refueling m is n.

[0012]

However, in the conventional refueling device with the automatic full-tank refueling control function, the flow rate at the time of additional refueling is fixed, and intermittent refueling is provided with a predetermined bubble disappearance waiting time. Therefore, the following inconvenience occurs. That is, when the full tank determination condition and the bubble disappearance waiting time are set in accordance with the properties of gasoline that is most often used, it is possible to perform accurate and quick automatic full tank refueling with oil liquids having different properties. Can not.

Specifically, taking the case where the oil liquid is light oil as an example, light oil has the characteristics that it has a higher specific gravity, a higher vapor pressure, and a higher viscosity than gasoline. Therefore, for example, even when the pump driving motor is operated at a steady operation amount, the flow rate of the liquid delivered from the pump, that is, the flow rate of the fuel discharged from the refueling nozzle greatly differs between gasoline and light oil. In addition, the amount of bubbles generated in the tank during refueling is much higher in light oil than in gasoline, so the same amount of the operating lever of the refueling nozzle is opened to operate the pump drive motor at the same operating amount. Even if refueling is carried out by using, the amount of bubbles generated differs between gasoline and light oil.

In this case, if the bubble disappearance waiting time necessary for the generated bubbles to disappear naturally is set on the basis of gasoline, in the case of light oil, the bubble disappearing waiting time elapses. However, the bubbles in the tank do not disappear, and the additional oil supply m is started in a state where the bubbles remain on the liquid surface in the tank. As a result, the amount of additional refueling becomes small, and although it is actually possible to refuel, it is possible to determine that the tank is full and refueling is ended.

On the contrary, if the defoaming waiting time is set for each oil liquid according to the properties of the oil liquid,
In a foamy liquid such as light oil, there is a disadvantage that the bubble disappearance waiting time becomes very long, resulting in a longer refueling time than manual refueling. Furthermore, when the amount of refueling is increased, the generation of bubbles is promoted, so a long waiting time for defoaming is required.When the amount of refueling is reduced, the waiting time for defoaming is short, but the overall refueling time is shortened. Is difficult to achieve. In addition, it is difficult to accurately represent information about bubbles such as the amount of bubbles generated as input information, and it is difficult to set a bubble disappearance waiting time based on the information.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to estimate an accurate oil liquid flow rate from information on bubbles accompanied by complicated behavior and shorten the refueling time.

[0017]

In order to achieve the above object, the present invention relates to an oil supply apparatus for supplying an oil liquid into a tank by a liquid supply means from an oil supply nozzle inserted into an oil supply port of a vehicle. The nozzle is provided with a bubble surface detecting means for detecting the bubble surface height with respect to the full tank liquid level in the tank, and a liquid level setting means for setting the full tank liquid level of the oil liquid, and the liquid sending means, A control means for continuously controlling the oil liquid flow rate is provided, and the control means performs fuzzy inference using the deviation of the bubble surface height with respect to the full liquid level and the time change amount of the deviation to obtain the oil liquid. An oil supply device is proposed that includes a fuzzy inference unit that determines a flow rate value and an adjusting unit that changes the oil liquid flow rate based on the oil liquid flow rate value determined by the fuzzy inference unit.

[0018]

According to the refueling apparatus of the present invention, when the refueling nozzle is inserted into the refueling port of the vehicle and the refueling by the liquid feeding means is started, the foam level in the tank is increased by the foam level detecting means provided in the refueling nozzle. Is detected and the full liquid level is set by the liquid level setting means. In the fuzzy inference unit, fuzzy inference is performed using the thus obtained deviation between the bubble surface height and the full liquid level and the time change amount of the deviation to determine the oil liquid flow rate value. Then, the adjusting means is operated based on the determined oil liquid flow rate value, and the oil liquid flow rate by the liquid feeding means is continuously controlled.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the oil supply device according to the present invention will be described below with reference to FIGS. FIG. 1 shows an oil supply device 20 of this embodiment. In addition, in the fuel supply device 20 of FIG. 1, the same components as those of the fuel supply device 1 shown in FIG.

In FIG. 1, reference numeral 21 is a refueling nozzle 8
Is a bubble surface sensor provided in the. The foam surface sensor (foam surface detecting means) is, for example, an ultrasonic sensor, and can detect the foam surface height L _B (the distance between the foam surface sensor 21 and the foam surface) in a non-contact manner. It is like this. Reference numeral 22 is
The liquid level sensor (liquid level setting means) is provided on the tip end side of the cylinder tip 8a of the oil supply nozzle 8, and when the rising liquid level of the oil liquid comes into contact, the oil liquid in the tank 23 becomes full. The fact that the tank liquid level L _F has been reached can be detected. In this case, the bubble level sensor 21 and the liquid level sensor 22
Since the relative distance between the liquid level sensor 22 and the liquid level sensor 22 is set to a predetermined value, the liquid level sensor 22 detects the deviation of the bubble surface height L _B up to the full tank liquid level L _F when the fuel filling nozzle 8 is inserted into the oil filling port 23 a. A full tank liquid level L _F for calculating u is set.

Further, in FIG. 1, reference numeral 24 is a flow rate control device (control means) provided in the oil supply device main body 20a.
Is shown. The flow rate control device 24 of the present embodiment is a pump driving motor based on a control calculation unit (fuzzy inference unit) 25 connected to the bubble level sensor 21 and the liquid level sensor 22 and an output signal from the control calculation unit 25. (Liquid feeding means) 4
And an inverter (adjusting means) 26 for adjusting the rotation speed of the. In the control calculation unit 25, the sensors 21
2 based on the output signal output from No. 2, the oil liquid flow rate value Q ₀
Is determined, and the rotational speed signal of the pump drive motor (liquid feeding means) 4 corresponding to the oil liquid flow rate value Q ₀ is sent to the inverter (adjusting means) 26. In FIG. 1, reference numeral 27 is a nozzle open sensor, which sends a trigger signal for starting the flow rate control to the flow rate control device 24.

Here, the arithmetic processing in the control arithmetic unit 25 is carried out according to the following control rule. That is, roughly speaking, the tank 2 is provided by refueling.
The oil liquid flow rate value Q is adjusted so that the bubbles generated on the liquid surface in 3 become the maximum value within the range where the bubbles do not overflow from the oil supply port. That is, the oil liquid flow rate Q is controlled according to the amount of bubbles generated or the amount of bubbles lost, and the refueling is ended by the detection of the full tank liquid level L _F by the liquid level sensor 22.

Specifically, the deviation u and the time variation Δu thereof are calculated from the bubble surface height L _B and the full tank liquid level L _F detected by the bubble surface sensor 21 and the liquid surface sensor 22, The oil liquid flow rate value Q ₀ is determined by fuzzy inference based on these values. The fuzzy inference method in the control operation unit 25 of this embodiment will be described below. First, the deviation u, the change amount Δu of the deviation with time, and the membership function μ representing the oil liquid flow rate Q are formed into a triangle as shown in the following expression (1).

Μ (x, X, W) = max (0, (− | x−X | + W / 2) * 2 / W) (1) where X: the value of the membership function is The value of x to be 1,
W: The lateral spread of the membership function is shown.

FIGS. 2 to 4 show the membership functions of the deviation u, the time variation Δu of the deviation, and the oil liquid flow rate Q. NL, NM, NS, Z, PS, PL, F, L, M, S in the figure
Is the label of the membership function, each of
It is assumed to be a triangular function shown in the above equation (1). Here, in the fuzzy set represented by each label, NL:
Large negative value, NM: Medium negative value, NS: Small negative value, Z: Zero, PS: Small positive value, PL: Large positive value, F: Maximum oil flow rate value, L: Large Oil liquid flow rate value,
M: Medium oil flow rate value, S: Small oil flow rate value, respectively.

In this embodiment, the fuzzy control rules shown in Table 1 are used. In this table 1, the deviation u is in the vertical column.
Is a fuzzy set of the deviation u, and the horizontal line is a fuzzy set of the oil flow rate Q which is the output of the control calculation unit 25.

[0027]

[Table 1]

Next, the meaning of the fuzzy control rule will be described. For example, when the deviation u and the time change amount Δu of the deviation u are large negative values, the oil liquid amount in the tank 23 is small and the bubbles disappear quickly, so that the oil liquid flow rate Q is increased. To do. Further, as the deviation u moves toward a positive value, the amount of oil liquid in the tank 23 increases, and as the time change amount Δu of the deviation u moves toward a positive value, bubbles tend to increase. The liquid flow rate Q is gradually reduced.

Further, as a fuzzy inference method of the oil liquid flow rate value Q ₀ based on the above fuzzy control rule, "algebraic product-
"Addition-centroid method" is used. The "algebraic product-addition-centroid method" will be described below with reference to FIGS. First, from the measured value of the deviation u (for example, u ₀ ), the fuzzy set to which the deviation u ₀ belongs (for example, NM
And NS) are selected. Further, a fuzzy set (for example, Z and PS) to which the time change amount Δu ₀ belongs is selected from the value of the time change amount Δu of the measured deviation u (for example, Δu ₀ ).

Then, for example, in the combination of the fuzzy sets NM and Z, as shown in FIG.
Evaluate. First, from the membership function μ _A1 (u) of the fuzzy set NM at the deviation u ₀ and the membership function μ _B1 (Δu) of the fuzzy set Z at the time change amount Δu of the deviation, the fuzzy sets NM and Z are combined. Membership function μ of oil flow rate Q corresponding to
_C1 (Q), that is, the fuzzy set M is selected. next,
Based on these membership functions, the fuzzy set NM relating to the deviation u ₀ and the temporal change Δu ₀ of the deviation u
Inference result of oil liquid flow rate Q in combination of Z and Z μ
_C'1 (Q) is calculated by the following equation (2). μ _C′1 (Q) = μ _A1 (u) · μ _B1 (Δu) · μ _C1 (Q) ··· (2) Specifically, the deviation u and the temporal change amount Δu of the deviation u are specified. Fuzzy set N obtained by general values u ₀ , Δu ₀
Considering the concrete values μ _A1 (u ₀ ) and μ _B1 (Δu ₀ ) of the membership functions μ _A1 (u) and μ _B1 (Δu) of M and Z as the fitness of each function, the algebraic product of both By taking, the membership function μ _C1 (Q) of the oil flow rate Q corresponding to the combination of the fuzzy set NM and Z shown by the broken line in FIG.
A concrete inference result in μ _C'1 (Q) is obtained.

The calculation by the above equation (2) is performed by fuzzy set N.
This is performed for all combinations of M, NS, Z, and PS, and the membership function μ _{C ′} (Q) of the inference result C ′ is calculated by the operation shown in the following expression (3). μ _{C '} (Q) = μ _C'1 (Q) + ... + _{M C'n} (Q) ... (3) Here, in the case of this example, n = 4. Formula (3) above
Specifically, represents the sum of the areas of the triangles shown by the broken lines in FIG.

Then, as the final fuzzy inference result, the center of gravity of the inference result C'calculated as described above is obtained by the following equation (4) to obtain the oil liquid flow rate value Q _0.
Can be determined. Q ₀ = (QμC _' (Q) dQ) / (μC _' (Q) dQ) ... (4)

The oil liquid flow rate value Q thus determined
FIG. 7 shows the time change of the oil liquid flow rate Q based on ₀ , and FIG. 6 shows the time change of the liquid surface and the bubble surface at that time. According to these figures, when the operator operates the operation lever 8b of the refueling nozzle 8 to start refueling, the liquid level and the state of the foam surface are determined by the foam surface sensor 21 to detect the foam surface height. Since the bubble surface has not yet reached R, the control by the flow rate control device 24 is not started, and the oil liquid flow rate Q is in the fully open state F. Then, when the bubble surface reaches the detection area R of the bubble surface height L _B by the bubble surface sensor 21, the control by the flow rate control device 24 of the present embodiment is started, and the bubble surface height L _B and the full liquid level L. _The maximum oil liquid flow rate value Q _{0, which} is the limit at which bubbles do not overflow from the tank 23, is sequentially calculated from the deviation u from _F and the time change amount Δu, and the rotation speed of the pump drive motor 4 is adjusted by the inverter 26. As a result, the oil liquid flow rate Q is continuously changed.
When the full liquid level L _F is detected by the liquid level sensor 4, the oil flow rate Q is set to zero to stop the refueling, and the pump drive motor 4 is turned off to complete the refueling.

Therefore, according to the oil supply apparatus 20 of the present embodiment, by using the bubble surface sensor 21, the generation of bubbles is directly monitored, and fuzzy inference is performed from the increase / decrease information of bubbles that behave indefinitely. Since the oil liquid flow rate value Q ₀ is determined, it is possible to reliably and automatically fill the tank. Moreover, automatic full tank refueling can be performed regardless of the type of oil. Further, when bubbles occur during refueling, unlike the conventional example, there is no need to provide a bubble disappearance waiting time until the bubbles disappear, so that the refueling time can be shortened. Further, since the liquid level is controlled by the bubble surface generated on the liquid surface and rising before the liquid level, the full surface liquid level L _F is detected by the liquid level sensor 22,
There is an effect that the overflow of the oil liquid from the oil supply port 23a can be reliably prevented.

[0035]

As described in detail above, according to the oil supply device of the present invention, the oil supply nozzle has a bubble surface detecting means for detecting the bubble surface height with respect to the full liquid level in the tank, and the full liquid level. And a liquid level setting means for setting the liquid level, and the liquid feeding means is provided with a control means for continuously controlling the oil liquid flow rate, and the control means controls the deviation of the bubble surface height with respect to the full liquid level and the time variation thereof. Since the fuzzy inference unit for performing the fuzzy inference using the to determine the oil liquid flow rate value and the adjusting means for changing the oil liquid flow rate based on the determined oil liquid flow rate value are provided, the following effects are achieved. Since we decided to estimate the oil liquid flow rate by performing fuzzy inference based on the bubble increase / decrease information with uncertain behavior, the conventional bubble disappearance waiting time becomes unnecessary,
Refueling time can be shortened. Since the oil supply is performed while directly monitoring the generation / disappearance of bubbles, it is possible to surely perform the automatic full tank oil supply and also to control the appropriate oil liquid flow rate according to the oil type. Since the oil liquid flow rate is determined based on the increase / decrease information of bubbles rising before the liquid level, it is possible to reliably prevent the oil liquid from overflowing from the tank.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an oil supply device according to the present invention.

FIG. 2 is a diagram showing a membership function of a deviation u between a full liquid level and a bubble surface height in a fuzzy inference unit of the fueling apparatus of FIG.

FIG. 3 is a diagram showing a membership function of a temporal change amount Δu of a deviation u between a full liquid level and a bubble surface height in a fuzzy inference unit of the fuel supply apparatus of FIG.

FIG. 4 is a diagram showing a membership function of an oil liquid flow rate Q in a fuzzy inference unit of the oil supply apparatus of FIG.

5 is a diagram showing an example of a fuzzy inference method (algebraic product-addition-centroid method) in the fuzzy inference unit of the fueling apparatus of FIG.

FIG. 6 is a diagram showing how the liquid level and the bubble surface height change with time in the oil supply device of FIG. 1.

7 is a diagram corresponding to FIG. 6 and showing how the oil liquid flow rate Q changes with time.

FIG. 8 is a schematic configuration diagram showing a conventional example of an oil supply device.

9 is a time chart showing the relationship between the sensor output and the oil liquid flow rate with respect to time for explaining the work content of full tank refueling in the fueling apparatus of FIG.

[Explanation of symbols]

L _B Bubble surface height L _F Full tank liquid level u Deviation Δu Deviation of time variation Q Oil liquid flow rate value 4 Pump drive motor (liquid feeding means) 8 Refueling nozzle 20 Oil supply device 21 Foam surface sensor (foam surface detection means) 22 Liquid Level Sensor (Liquid Level Setting Means) 23 Tank 23a Refueling Port 24 Flow Control Device (Control Means) 25 Control Calculation Unit (Fuzzy Inference Unit) 26 Inverter (Adjustment Means)

Claims (1)

[Claims] 1. A refueling device for supplying oil liquid into a tank from a refueling nozzle inserted into a refueling port of a vehicle by means of a liquid feeding means, wherein the refueling nozzle has a bubble surface height relative to a full tank liquid level in the tank. And a liquid level setting means for setting the full liquid level of the oil liquid, and the liquid feeding means is provided with a control means for continuously controlling the oil liquid flow rate, The control means determines the oil-liquid flow rate value by performing fuzzy inference using the deviation of the bubble surface height with respect to the full liquid level and the time variation of the deviation, and the fuzzy inference section. And an adjusting unit that changes the oil liquid flow rate based on the obtained oil liquid flow rate value.