JPH0637235B2 - Refueling method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a refueling system using a refueling device having a preset refueling function, and particularly to a change in refueling mode between preset refueling and normal refueling. The present invention relates to a refueling system that corrects the amount of error caused by the refueling so that accurate refueling can be performed regardless of the refueling mode.

[Prior art]

In general, a refueling device having a preset function includes a pump and a flow meter provided at one end of a pipe connected to a tank, a refueling nozzle connected to the other end of the pipe through a hose, and the flow meter. A flow rate transmitter that is attached and outputs a flow rate signal corresponding to the amount of lubrication measured by the flow meter, a lubrication amount counting circuit that counts the lubrication amount based on the flow rate signal from the flow rate transmitter, and the lubrication amount counter An indicator for displaying the amount of oil supplied by the oil supply nozzle based on the amount of oil supplied by the circuit, a preset switch for presetting the amount of oil supply during preset oil supply, and the amount of oil supplied by the oil supply amount counting circuit is preset by the preset switch. And a refueling stop means for stopping refueling when the amount is reached, and the refueling stop means is a pump motor attached to the pump, or in the middle of piping. Such vignetting electromagnetic valve is used.

Then, at the time of normal refueling, both the start and stop of refueling are performed by opening and closing the refueling nozzle, and at the time of preset refueling, the refueling is started by opening the refueling nozzle.
Refueling is stopped by stopping the pump motor that drives the pump,
Alternatively, it is carried out by a fuel supply stopping means such as closing of a solenoid valve provided in the middle of the pipe, and the fuel supply nozzle is closed after the preset fuel supply is completed. Therefore, at the time of preset refueling, even if the refueling stop means is stopped, the main valve of the refueling nozzle remains open, so the oil flow is stopped only by the automatic valve. Compared to the end of refueling (when the main valve is closed), the oil liquid in the hose flows into the fuel tank of the vehicle by the amount of expansion of the hose. This outflow amount varies depending on the filling station and the filling time depending on the length of the hose, but is usually considered to be about 0.1 to 0.5.For example, when the previous time is preset refueling and this time is normal refueling, etc. There is a possibility that a small amount of error will occur for each different value.

[Problems to be solved by the invention]

This is shown in Fig. 7, and as shown in Fig. 7 (a), in the case of normal refueling both last time and this time, it is the amount from opening to closing of the refueling nozzle. And the actual refueling amount match. On the other hand, as shown in Fig. 7 (b), when the previous time is preset lubrication and this time is normal lubrication, the oil liquid necessary to fill the hose by driving the pump is before the opening operation of the refueling nozzle. Therefore, the actual amount of oil supply from when the oil supply nozzle is opened to when the oil supply nozzle is closed is reduced by this amount. On the other hand, as shown in FIG. 7C, when the preset refueling is performed both last time and this time, the oil liquid filling the hose again flows out again, so that the displayed value and the actual refueling amount match. Further, as shown in FIG. 7 (d), when the previous time is normal refueling and this time is preset refueling, even if the liquid supply stopping means is operated, extra oil is replenished by the amount of the oil liquid flowing out from the hose. It will be.

The present invention has been made in view of the above-described problems with the conventional method, and when preset refueling is completed, the hose is preliminarily provided with an oil solution corresponding to the oil solution that has flowed out of the hose while the refueling nozzle is closed. This expansion amount is filled in and stored as a correction amount, and when the next time is normal refueling, the refueling process is performed without any change from the time when the previous time was normal refueling, and the next or It is an object of the present invention to provide a refueling method in which a preset refueling amount is subtracted from a preset amount when the preset refueling is subsequently performed so that the displayed value and the actual refueling amount are matched.

[Means for solving problems]

In order to solve the above-mentioned problems, the refueling system according to the present invention includes a pump and a flow meter, one end of which is provided in the middle of a pipe connected to a tank, and a refueling nozzle connected to the other end of the pipe through a hose. A flow rate transmitter that is attached to the flow meter and outputs a flow rate signal corresponding to the measured flow rate; a refueling amount counting means that counts a refueling amount based on a diversion signal from the flow rate transmitter; and a refueling amount count A display for displaying the amount of oil supplied by the oil supply nozzle based on the amount of oil supply counted by the means, a preset means for presetting the amount of oil supply at the time of preset oil supply, and the amount of oil supplied by the oil supply amount counting means is the amount of preset by the preset means. And a refueling stop means for stopping refueling when

The features of the configuration adopted by the present invention include an oil liquid filling means for filling the hose with an oil liquid after the preset refueling is completed, and when the oil liquid is filled by the oil liquid filling means, from the flow transmitter. The correction amount storage means for measuring the filling amount based on the output flow rate signal and storing it as a correction amount, and the correction amount stored in the correction amount storage means at the time of the next preset refueling are read and preset by the preset means. And a preset amount correcting means for performing subtraction correction on the amount, so that the refueling stopping means is activated when the amount of refueling counted by the refueling amount counting means reaches the preset amount corrected by the preset amount correcting means. There is something I did.

[Action]

With this configuration, when the refueling operation of this time is preset refueling, the oil liquid filling means is activated after the preset refueling is completed, and the refueling nozzle is opened at the end of the preset refueling. The hose is filled with an oil liquid corresponding to the oil liquid that has flown out, and the filling amount filled by the oil liquid filling means is stored as a correction amount by the correction amount storage means.

Then, when the preset refueling is performed next time, the preset amount correction means reads the correction amount stored in the correction amount storage means, subtracts and corrects the preset amount by the preset means, and the refueling stop means is the refueling amount counting means. When the counted refueling amount reaches the preset amount corrected by the preset amount correcting means, the fixed amount is stopped.

As a result, even when the preset oil supply is performed in which the oil liquid discharge from the oil supply nozzle is completed and the oil supply is automatically stopped while the oil supply nozzle is still open, the displayed value and the actual oil supply amount can always be matched. .

〔Example〕

Hereinafter, the case where the oil supply system of the present invention is applied to a fixed oil supply device will be described in detail based on the embodiments shown in the drawings.

1 to 5 show a first embodiment of the present invention. In this embodiment, a solenoid valve including a main solenoid valve and a sub solenoid valve is used as the oil supply stopping means.

In FIG. 1, a fixed type oil supply device 1 includes a lower case 2 and
A pipe 4 having one end connected to a tank (not shown) is provided in the lower case 2 and is composed of an upper case 3 and a pump driven by a pump driving motor 5 in the middle of the pipe 4. 6, a flow meter 7 for measuring the amount of refueling, a solenoid valve 8 comprising a main solenoid valve 8A for a large flow rate and a sub solenoid valve 8B for a small flow rate which are opened and closed as described later are provided. A flow rate transmitter 9 for transmitting a flow rate signal proportional to the measured flow rate is attached to 7. Further, a hose 10 is connected to the other end of the pipe 4, and a refueling nozzle 11 is attached to the tip of the hose 10. The refueling nozzle 11 is housed in the nozzle housing portion 12 except during the refueling work. A switch 13 is provided in the nozzle housing portion 12 to be closed by removing the refueling nozzle 11 and to be opened by being hung on the nozzle housing portion 12, and the motor 5 is driven by closing the switch 13. At the same time, the solenoid valve 8 is opened, and the motor 5 is stopped by opening the solenoid valve 8.

On the other hand, a display portion 14 is formed on the front surface of the upper case 3,
The display unit 14 includes an amount indicator 15, a refueling amount indicator 16,
A unit price indicator 17 is provided. Also, the upper case 3
Is provided with a preset switch 18 constituting a presetting means, and the preset switch 18 is, for example, a fixed quantity switch 18A, 18B, 18C, 18 for presetting 10, 15, 20, 30, 40.
D and 18E are provided. Further, in the upper case 3, a unit price setter 19 for setting the amount of money per unit flow rate, that is, a unit price, and a control circuit 20 described in detail in FIG. 2 are incorporated. Each of the fixed quantity switches 18A to 18E constituting the preset switch 18 may be a fixed amount switch for presetting a refueling amount, for example, 1,000 yen, 1,500 yen, 2,000 yen, 3,000 yen, 4,000 yen, instead of the refueling amount. Further, the preset means may be a dial type preset switch or a ten-key type preset switch instead of the push button type preset switch, and further may be a card type preset means for presetting by inserting a card into a card reader. On the other hand, the presetting means can be provided in an appropriate place such as an office room or an outdoor card reader box.

Next, FIG. 2 shows a specific circuit diagram of the control circuit 20. The control circuit 20 includes a processing device 21 including a CPU, a ROM 22 for storing the programs shown in FIGS. Preset amount under control of device 21,
A RAM 23 for storing an actual amount of oil supply, a correction amount described later, etc., a display unit control circuit 24 for controlling each of the displays 15 to 17 of the display unit 14 to display the amount of oil supply, an input / output circuit 25, the input / output circuit 25, which is provided on the output side of 25, and is roughly configured by a motor drive circuit 26 and a solenoid valve control circuit 27 that control the motor 5 and solenoid valves 8A and 8B under the control of the processing device 21. Then, the processing device 21, ROM 22, RA
The M23, the display control circuit 24, the input / output circuit 25, etc. are connected to each other via a data bus 28. Further, the flow rate transmitter 9 is connected to the interrupt input int of the processing device 21, and the amount of refueling is counted based on the flow chart of FIG. Further, the nozzle switch 13 and the preset switch 18 are connected to the input side of the input / output circuit 25, and the processing circuit 21 reads the signal.

This embodiment is constructed as described above, and its operation will be described next.

Here, the operation of normal refueling without using the preset switch 18 will be described first.

First, when the refueling nozzle 11 is removed from the nozzle housing portion 12,
The nozzle switch 13 is closed, and the closing signal is read by the processing device 21 via the input / output circuit 25. As a result, from the processing device 21, the motor drive circuit 26
A motor start signal is output to the motor 5 to start the motor 5, and a valve opening signal is output to the solenoid valve control circuit 27 to open each solenoid valve 8A, 8B. In addition, from the processing device 21 to RA
By outputting a reset signal to the refueling counting area PCOUNT in M23 and resetting the counting area PCOUNT, each display unit 15, via the display unit control circuit 24,
The previous display value displayed in 16 is reset to zero. In this state, when the refueling nozzle 11 is inserted into the fuel tank of the vehicle and the valve is opened, the oil liquid from the tank is discharged from the pipe 4, the pump 6,
Refueling nozzle 1 via flow meter 7, solenoid valve 8 and hose 10
It is discharged from 1. The flow rate at this time is measured by the flow meter 7, the flow rate signal from the flow rate transmitter 9 is input to the processing device 21, and the processing device 21 enters the refueling counting area PCOUNT in the RAM 23 to perform steps S25 to 27 in FIG. Counting is performed by the interrupt processing shown. Then, the count signal from the refueling counting area PCOUNT is output to the display control circuit 24, and after the binary coded decimal counting, the display signals are integrated into the respective display units 15 and 16 via the display drive circuit (not shown). Is displayed.

Then, when the desired amount of refueling is reached, the refueling nozzle 11 is housed in the nozzle housing 12 and the nozzle switch 13 is opened. As a result, the opening signal is read by the processing device 21, the processing device 21 outputs a motor stop signal to the motor drive circuit 26 to stop the motor 5, and outputs a valve closing signal to the solenoid valve control circuit 27. The solenoid valves 8A and 8B are closed.

Although the normal refueling operation is completed as described above, these operations are substantially the same as those in the conventional art.

Next, a preset refueling operation using the preset switch 18 will be described with reference to FIGS. 3 to 5.

First, prior to the refueling work, the preset amount desired by the customer is preset by the preset switch 18 (step S1). At this time, if the value desired by the customer is 20, the quantitative switch 18C is pushed. As a result, the preset value (PRESS
T) is stored in the preset amount storage area PRESET in the RAM 23 via the input / output circuit 25.

In the next step S2, under the control of the processing device 21, R
The previous refueling amount in the refueling counting area PCOUNT of AM23 is reset, the display values of the respective display units 15 and 16 are reset to zero, and the main solenoid valve closing value storage area V1STO
A value (PRESET-CO) obtained by subtracting a predetermined constant value (CONST1) from the preset value (PRESET) in the preset amount storage area PRESET to P
NST1) is set and the auxiliary solenoid valve closing value storage area V2S
A value (PRESET-CONST2-ADDPLS) obtained by subtracting a constant value (CONST2) and the correction value (ADDPLS) stored in the correction amount storage area ADDPLS from the preset value (PRESET) is set in TOP. Here, the constant value COST1 is set to a value suitable for the first-stage valve closing to improve the measurement accuracy, that is, a number as a value up to the second-stage valve closing, and the other integrated value CONST.
Reference numeral 2 is an overrun amount that occurs when the sub solenoid valve 8B is closed, and is usually set to 0.1 to 0.3 degrees, and the correction value ADD
PLS is a flow rate counted at the time of filling the hose 10 at the end of the previous preset refueling, and is about 0.1 to 0.5, which is a different variable each time.

After setting the preset amount as above,
Similar to the case of the normal refueling operation described above, the refueling nozzle 11
When the nozzle switch 13 is removed from the nozzle housing 12, the nozzle switch 13 is closed, and the closing signal is read by the processor 21. As a result, the processor 21 outputs a motor start signal to the motor drive circuit 26 to start the motor 5 (step S3), and outputs a valve open signal to the solenoid valve control circuit 27 to output each solenoid valve 8A, 8B. Is opened (step S4).

In this state, when the refueling nozzle 11 is inserted into the fuel tank and the valve is opened, the oil liquid from the tank is discharged from the refueling nozzle 11. The flow rate at this time is measured by the flow meter 7,
The flow rate signal from the flow rate transmitter 9 is input to the processing device 21, counted by the interrupt processing shown in steps S25 to S27 in FIG. 4, and the above-described refueling counting area PCOUNT.
Are sequentially added. Then, the counting area PCOU
The count signal from NT is output to the display unit 14 via the display control circuit 24, and integrated and displayed by the respective display units 15 and 16.

Next, the processing device 21 constantly monitors the refueling counting area PCOUNT and the main solenoid valve closing value storage area V1STOP (step S5), and when it determines that the refueling amount (PCOUNT) has not reached the predetermined value (V1STOP). When the refueling nozzle 11 is hooked in the nozzle housing portion 12 in step S6 by the steps S6 and S7, it is determined that the refueling nozzle 11 has been changed to normal refueling on the way, and the motor 5 is operated in step S23. Stop it. On the other hand, in step S5, the oil supply amount (PCOUN
When it is determined that T) has reached the predetermined value (V1STOP), the processing device 21 outputs the main solenoid valve closing signal to the solenoid valve control circuit 27 to close the main solenoid valve 8A (step S).
8). As a result, the flow rate in the pipe 4 is reduced from a large flow rate to a small flow rate.

Next, the processing device 21 monitors the refueling counting area PCOUNT and the sub electromagnetic valve closing value storage area V2STOP (step S9), and the refueling amount (PCOUNT) is a predetermined value (V2S).
When it is determined that the value has not reached (TOP), the standby loop state is set in steps S10 and S11. On the other hand, when it is determined that the oil supply amount (PCOUNT) has reached the predetermined value (V2STOP), the processing device 21 causes the solenoid valve control circuit 2 to operate.
An auxiliary solenoid valve closing signal is output to 7 and the auxiliary solenoid valve 8B is closed (step S12). As a result, refueling is completed.

Next, the processing device 21 transmits the above-mentioned auxiliary electromagnetic valve closing signal, and then performs the addition process in step S13. That is,
As described above with reference to the explanatory view of FIG. 7 (d), in the preset refueling, the hose 1 is not closed even after the auxiliary solenoid valve 8B is closed.
0, since the oil liquid in the pipe 4 flows out excessively, an accurate amount of oil supply cannot be measured unless this amount is added. Therefore, the processing device 21 performs a process of adding the correction value (ADDPLS) stored in the correction amount storage area ADDPLS in the previous preset refueling to the value (PCOUNT) in the refueling counting area PCOUNT (step S).
13) Then, the value after this addition is displayed on the displays 15 and 16 (step S14). This state corresponds to the shaded portion a in FIG. Thus, it is possible to refuel the preset value (PRESET) desired by the customer with high accuracy.

Next, when the worker puts the fueling nozzle 11 on the nozzle housing portion 12, the nozzle switch 13 is opened, and this opening signal is input to the processing device 21. Thus, the processing device 21
When it is determined that the refueling nozzle 11 has been hooked (see step S15), the value in the refueling counting area PCOUNT is reset in step 16 in order to count the filling amount in the hose 10. However, the value of the refueling amount is stored in a buffer provided separately, and the display values of the indicators 15 and 16 are not reset to zero until the next refueling, and are kept displayed. In the preset refueling, even if the nozzle switch 13 is opened, the motor 5 is t ₁ seconds later (see FIG. 5).
(See (c)) Only keep the activation for a while.

In this state, the processing device 21 outputs a sub solenoid valve opening signal to the solenoid valve control circuit 27 in the next step S17 to turn on the sub solenoid valve 8B for a constant short time t ₂ seconds (see FIG. 5 (e)). Just open the valve. The time of t ₂ seconds is a time required for filling the hose 10 with the oil liquid flowing out from the hose 10 in preset refueling and keeping the hose 10 in an expanded state, usually 0.5 to 1 second. Is enough. When the pipe 4 and the hose 10 are filled with the oil liquid as described above, the oil liquid during this period is measured by the flow meter 7, the flow signal from the flow transmitter 9 is input to the processing device 21, and the refueling counting area is obtained. PC
Counted by OUT.

However, in the preset refueling, when the predetermined preset amount is reached, the solenoid valve 8 is automatically closed to perform a fixed refueling, which is different from the normal refueling in which the operator opens and closes the refueling nozzle 11. In some cases, the fueling nozzle 11 may be hung on the nozzle housing portion 12 without noticing that the valve is still open. As a result, if the refueling nozzle 11 is removed at the next refueling operation, the nozzle switch 13 is closed and the pump 6 is driven, and there is a risk that the oil liquid is instantaneously discharged. Therefore, the processing device 21 has the refueling nozzle 1
In order to confirm whether or not No. 1 is open, the value counted in the refueling counting area PCOUNT while the sub solenoid valve 8B is open for a fixed time t ₂ in the next step S18 (P
It is determined whether or not COUNT) is smaller than a predetermined value (K). Since the count value (PCOUNT) is usually about 0.1 to 0.5, the predetermined value (K) is, for example, 1
It is enough to set it appropriately. Thus, when it is determined in step S18 that the count value (PCOUNT) is larger than the predetermined value (K), the processing device 21 causes the display unit 14 via the display control circuit 24.
An error display signal is output to and the display values of the respective display units 15 and 16 are flicker-displayed (step S19). In step S19, a buzzer or the like may be sounded instead of the flicker display, or a voice may be generated from a speaker by a voice synthesizer. As mentioned above, each indicator 1
For the flicker display of 5 and 16, remove the refueling nozzle 11 once,
It continues until the valve is surely closed and the nozzle housing 12 is re-applied (step S20).
The output of the display signal from is stopped (step S21), the process returns to step S16 again, and steps S16 to S18 are repeated. Therefore, by the loop of steps S18 to S21, it is possible to perform safety confirmation whether or not the oil supply nozzle 11 is still open.

In addition, the count value (PCOUNT
When it is determined that T) is smaller than the predetermined value (K), the processing device 21 transfers the count value (PCOUNT) in the refueling count area PCOUNT to the correction amount storage area ADDPLS as the correction amount (ADDPLS) and stores it. (Step S22). Then, this correction amount (ADDPL
S) is used as a correction value (ADDPLS) in step S2 at the next preset refueling (however, normal refueling may be performed any number of times during this time). In addition,
The correction value (ADDPLS) is shown as a shaded portion b in FIG.

When the storage of the correction value (ADDPLS) is completed as described above, the processing device 21 outputs a motor stop signal to the motor drive circuit 26 to stop the motor 5 (step S2).
3), a series of preset refueling ends (step S2)
4).

Although the present embodiment is as described above, the refueling amount counting area PCOUNT realized in the RAM 23 is a specific example of the refueling amount counting means according to the present invention, and steps S16 and S17 fill the hose 10 with the oil liquid. Is a specific example of the oil liquid filling means, and steps S18 and S22 are specific examples of the correction amount storage means for storing the correction amount (ADDPLS). Further, in step S2, the correction amount (ADDP) is added to the preset amount (PRESET) by the preset switch 18.
It is a specific example of a preset amount correcting means for subtracting and correcting LS). Further, steps S18 to S21 are the refueling nozzle 1.
1 shows a specific example of valve opening detection means for detecting whether 1 is open.

Next, FIG. 6 shows a second embodiment of the present invention. The feature of the present embodiment is that, as a refueling stopping means at the time of preset refueling, instead of the solenoid valve 8 in the first embodiment, a motor for driving a pump is used. 5, a fixed amount oil supply operation is performed by controlling the rotation of the motor 5. Therefore, in this embodiment, the solenoid valves 8A and 8B are not provided in the middle of the pipe 4, and the fixed amount stop mode is also a one-step stop due to the rotation stop of the motor 5.

That is, in FIG. 6, steps S31 to S47 show a flow chart according to this embodiment.
A value obtained by subtracting a constant amount (CONST3) by the inertial rotation of the motor 5 and a correction amount (ADDPLS) from the preset value (PRESET) is stored in the motor stop value storage area MSTOP3. Next, the motor 5 is rotated (step S32), the same processing as in the first embodiment is executed (steps S33 to 35), and the motor 5 is stopped when the amount of oil supply (PCOUNT) reaches a predetermined value (MSTOP). (Step S36), a predetermined amount of oil is supplied. Next, similarly to the first embodiment, steps S37 to S40 are executed, and the motor 5 is again rotated for a fixed time (step S4).
1) Fill the hose 10 with the oil liquid. Furthermore, the first
The processes in steps S42 to S47 may be performed in the same manner as in the above embodiment. Since the other operations are the same as those in the first embodiment, the description thereof will be omitted.

In each of the embodiments, the fixed type oil supply device is given as an example of the oil supply device used in the present invention. Type refueling device, in this case the first
Instead of the nozzle switch 13 in the above embodiment, an elevating switch or the like for moving the refueling nozzle up and down between the standby position and the refueling position may be used. Further, in the embodiment, the refueling nozzle 11
The valve opening detecting means for detecting the valve opening state of the above is provided. However, when there is a lever automatic release mechanism that automatically releases the latch mechanism of the nozzle lever when the oil supply nozzle 11 is hooked in the nozzle housing portion 12, the above-mentioned opening The valve detection means may be unnecessary.

〔The invention's effect〕

As described above in detail, the present invention is configured such that the hose is filled with the oil liquid in advance at the end of the preset refueling, and the filling amount at this time is subtracted and corrected at the next preset refueling. It is possible to prevent a situation in which an error occurs between the preset refueling and the preset refueling, and always perform accurate preset refueling.

[Brief description of drawings]

1 to 5 relate to a first embodiment of the present invention, FIG. 1 is an overall configuration diagram of an oil supply apparatus used in this embodiment, FIG. 2 is a control circuit diagram, and FIG. 3 is a preset oil supply process. Flow chart showing the operation, FIG. 4 is a flow chart showing the interrupt processing operation of the flow rate signal, FIG. 5 is a time chart showing the preset refueling operation, and FIG. 6 is the second embodiment of the present invention and the preset refueling processing. FIG. 7 is a flowchart showing the operation, and FIG. 7 is an explanatory diagram showing problems that occur in each refueling mode in the refueling system according to the conventional technique. 1 …… Fixed lubricator, 4 …… Piping 5 …… Motor, 6 …… Pump 7 …… Flowmeter, 8 …… Solenoid valve 10 …… Hose, 11 …… Refueling nozzle 14 …… Display, 15… … Amount indicator 16 …… Refueling amount indicator, 18 …… Preset switch 20 …… Control circuit, 21 …… Processing device 22 …… ROM, 23 …… RAM

Claims (4)

[Claims] 1. A pump and a flow meter provided in the middle of a pipe having one end connected to a tank, an oil supply nozzle connected to the other end of the pipe via a hose, and a flow rate measured by being attached to the flow meter. A flow rate transmitter that outputs a flow rate signal corresponding to
A refueling amount counting means for counting the refueling amount based on the flow rate signal from the flow rate transmitter, a display for displaying the refueling amount by the refueling nozzle based on the refueling amount counted by the refueling amount counting means, and a preset A refueling method comprising preset means for presetting a refueling amount during refueling, and refueling stop means for stopping refueling when the refueling amount by the refueling amount counting means reaches the preset amount by the preset means, after preset refueling is completed. An oil liquid filling means for filling the hose with an oil liquid, and when the oil liquid is filled by the oil liquid filling means, the filling amount is measured based on a flow rate signal output from the flow rate transmitter, and a correction amount is obtained. And a correction amount storage means for storing the correction amount stored in the correction amount storage means at the time of the next preset refueling. A preset amount correction means for performing a subtraction correction on the fuel amount, so that the refueling stop means is activated when the amount of refueling counted by the refueling amount counting means reaches the preset amount corrected by the preset amount correction means. A refueling system characterized by being configured in. 2. The oil supply system according to claim 1, further comprising valve opening detection means for detecting whether or not the oil supply nozzle is opened after the operation of the oil supply stop means. 3. The refueling system according to claim 1, wherein the refueling stop means is a solenoid valve provided in the middle of the pipe. 4. The oil supply system according to claim 1, wherein the oil supply stop means is a motor for driving the pump.