JP2542661B2 - Refueling device - Google Patents

Description

Description: “Industrial field of use” The present invention relates to a refueling device capable of automatic full tank refueling used at a gas station such as a gas station.

“Prior Art” Generally, at a gas station or the like, the drive stop control of a pump drive motor and a solenoid valve provided in the middle of a flow path is performed based on an output signal of a liquid level sensor provided at a tip of a fueling nozzle, A so-called full tank refueling is automatically performed to automatically fill a fuel tank such as.

Such full tank refueling ends at the time when the liquid level sensor provided in the refueling nozzle detects the liquid level of gasoline.However, in actuality, bubbles at the upper layer of gasoline due to splashes at the time of refueling. Then, the bubbles are detected before the liquid level of gasoline. In order to avoid erroneous detection of fullness of the liquid level sensor due to such bubbles, when the liquid level sensor outputs a detection signal, the refueling is interrupted to wait for the bubbles to disappear, and after this interruption, the liquid level sensor detects If the signal disappears, additional fueling such as refueling is restarted as appropriate, and thereby full tank fueling is performed.

In other words, at the time of full tank refueling, from the time when the liquid level sensor first detects a bubble of gasoline (hereinafter, the refueling until the liquid level sensor first detects gasoline is referred to as the initial refueling), It is necessary to refill the fuel tank with gasoline as an additional refueling after the first refueling until the tank is full.

Conventionally, as a device that can perform such additional refueling,
There are known oil supply devices as disclosed in JP-A-58-30993 and JP-A-61-164996.

The former refueling device measures, for example, the amount of gasoline for each additional refueling that is repeatedly performed until it becomes full, and stores it as refueling data. Based on this refueling data, the first refueling after the first refueling is performed. When the amount of additional refueling is below a predetermined amount (for example, 0.2 liters or less), the tank is completely refueled, and the refueling time for each additional refueling that is repeated until the tank is full It is measured and stored as refueling time data, and when the time required for one additional refueling becomes less than a predetermined time (for example, 2 seconds or less) set in advance, the full tank refueling is similarly completed. .

Further, the latter refueling device measures the number of times of additional refueling until the tank is full and stores it as refueling frequency data, and the number of times of additional refueling is a predetermined number of times (for example, 3).
Similarly, the time when the full tank refueling is completed is similarly set.

That is, the refueling device determines whether full refueling is completed with the additional lubrication amount per time, the time of additional refueling per time, and the number of times of additional refueling as criteria.

[Problems to be Solved by the Invention] By the way, in the refueling apparatus as described above, refueling is controlled with the additional lubrication amount per time, the time of additional refueling per time, and the number of times of additional refueling as criteria. Even if it does, gasoline may overflow from the filler port.
In other words, fluctuations in the power supply voltage supplied to the refueling device, changes in the hose state (due to changes in elastic force), the size of the opening of the nozzle valve of the refueling nozzle based on the operator's lever operation, and the provision of the nozzle in the refueling nozzle Due to factors such as changes in the pressing force of the automatic valve, the amount of refueling at one time changes slightly, which causes gasoline to overflow from the refueling port even if refueling is controlled based on the judgment criteria. Take it out,
There was a problem that the customer's vehicle was polluted or, on the contrary, the amount of fuel replenished was insufficient to fill the tank with full oil.

Such a problem will be described in detail with reference to the time chart of FIG. The upper, middle and lower parts of this figure respectively indicate the amount of oil supply with respect to time, ON / OFF of the liquid level sensor and ON / OFF of the pump drive motor.

When the liquid level sensor is turned ON, (timing indicated by T ₁₎ of the pump drive motor even if the OFF, ON and refueling stop state during normal refueling due to inertia and closing operations of the filling nozzle of the pump Due to the difference, the refueling does not stop immediately, but excessive refueling is performed as indicated by the passage amount of the symbols q ₀ , q ₁ , and q ₂ . This overrun amount does not always take a constant value, but changes in the power supply voltage, the state of the hose (due to changes in elastic force), the size of the nozzle valve opening, and the change in the pressing force of the automatic valve, as described above. Depending on the factors, its value is Δq ₀ , Δq
₁ , changes slightly as shown in Δq ₂ .

As a result, for example, in a refueling device that determines full when the amount of refueling in one additional refueling becomes less than or equal to Qc and completes refueling, for example, in the second additional refueling ((V) in the time chart Even if the additional fuel amount Q ₂ when the liquid level sensor is turned ON again is equal to or less than Qc and full tank refueling is completed, the fuel tank should normally be filled with Q ₀ , Q ₁ , and Q _2, supposed to q _0, the amount of gasoline that indicated by the q _1, q ₂ is stored is, in fact, be over this by factors mentioned above, further, Δq _0, Δq _1, Δq There was a problem that the amount of gasoline indicated by ₂ was refueled, and as a result, the gasoline overflowed from the refueling port.

In other words, due to the changed overrun amount (Δq ₀ , Δq ₁ , Δq ₂ ), gasoline overflows from the filler port, and conversely, the changed overrun amount (Δq ₀ , Δq ₁ , Δq ₂ ) In the case of negative, there was a problem that the tank was not actually full even though the tank was refueled.

"Means for Solving the Problem" The present invention has been made in view of the above circumstances, and corresponds to a change in the overrun amount, and serves as a reference additional refueling amount per one time, The purpose is to obtain a refueling device that performs full tank refueling without excess or deficiency by appropriately changing the settings such as the additional refueling time and the number of additional refueling.In order to achieve this purpose, In a fueling device having a pump for pumping up and discharging oil, and a fueling nozzle connected to a discharge side of the pump via a flow meter provided with a flow rate pulse transmitter, a liquid level provided on the fueling nozzle A sensor, a refueling stop means that is provided in the refueling nozzle upstream side flow passage and allows or stops the supply of the oil liquid to the refueling nozzle, and the oil absorption stop means, when stopped during refueling work, Flow pulse transmitter The flow amount pulse output from the counter is counted to measure the overrun amount, the refueling data measuring device for measuring the refueling data for full tank determination with refueling, and the overrun amount measuring device. Judgment data setting means for setting judgment refueling data for full tank judgment, judged refueling data set by the judgment data setting means, and refueling data measured by the refueling data measuring means And a full tank determination means for determining full tank,
A liquid level detection signal is supplied from the liquid level sensor, and a full tank determination signal is supplied from the full tank determination means.
The oil supply stop means is stopped by the input of the liquid level detection signal, the oil supply stop means is allowed to operate by the disappearance of the input of the liquid level detection signal, and the full level determination signal is input regardless of the liquid level detection signal. An operation control means for stopping the refueling stop means is provided.

[Operation] According to the present invention, the determination data setting means sets the determination refueling data based on the actually measured overrun amount, and then refueling measures the refueling data for full tank determination with refueling. By comparing with the refueling data measured by the data measuring means, it is determined whether or not the inside of the fuel tank is full due to the additional refueling.

In other words, the overrun amount slightly changes due to factors such as the fluctuation of the power supply voltage, the state of the hose (due to the change of the elastic force), the opening / closing of the nozzle valve, and the change of the pressing force of the automatic valve. , Set the judgment refueling data (consisting of the additional refueling amount per time, the additional refueling time per time, the number of additional refueling, etc.) according to the change in the overrun amount based on the actually measured passing amount. As a result, even if the power supply voltage fluctuates or the like, it is possible to perform appropriate additional lubrication corresponding to the factors such as the fluctuation of the power supply voltage.

[Example] An example of the present invention will be described with reference to Figs.

First, the configuration of the oil supply device will be described with reference to the schematic view of the oil supply device of FIG. 1 and the sectional view of the oil supply nozzle of FIG.

In FIG. 1, reference numeral 1 denotes a weighing machine body, and a side portion of the weighing machine body 1 is provided inside the weighing machine body 1 and one side thereof communicates with an oil storage tank (not shown). A hose 3 connected to the other side of the pipe 2 is provided, and
A supply nozzle 4 to be inserted into a fuel tank of an automobile is provided at the tip of the hose 3. The supply nozzle 4 is adapted to be attached / detached to / from a nozzle hook 5 provided on the side surface of the weighing machine body 1.

A pump motor 6 that supplies oil liquid to the hose 3 is provided in the middle of the pipe 2 in the weighing machine body 1.
This pump motor 6 is adapted to be turned ON / OFF based on a signal output from the control device indicated by reference numeral 8.

Inputs in the control device 8 for controlling the pump motor 6 will be described.

A nozzle switch 9 is provided at the mounting position of the oil supply nozzle 4 of the nozzle hook 5, a liquid level sensor 10 is provided at the tip of the oil supply nozzle 4, and a flow meter is provided in the middle of the pipe 2. Is provided with the flow pulse generator 11.

The nozzle switch 9 detects that the refueling nozzle 4 has been removed from the nozzle hook 5, and
The liquid level sensor 10 detects that the liquid level (upper bubbles) of the oil liquid supplied to the fuel tank has risen to a position where the oil level is full, and further, the flow rate pulse transmitter 11
Is to emit a pulse signal according to the flow rate of the oil liquid flowing through the pipe 2. As the liquid level sensor, an optical sensor including a light emitting element and a light receiving element that are arranged to face each other with an oil liquid intrusion space, an ultrasonic sensor including a transmitting element and a receiving element, or a capacitance sensor, etc. Used.

Then, the detection signals of the nozzle switch 9, the liquid level sensor 10, and the flow rate pulse transmitter 11 are appropriately input to the control device 8, and from the control device 8, the nozzle switch 9, the liquid level sensor 10, and the flow rate. A signal for turning ON / OFF the pump motor 6 is output based on the detection signal of the pulse transmitter 11 (the control circuit of the control device 8 will be described later with reference to FIG. 3).

In FIG. 1, reference numeral 12 is an oil supply amount indicator that displays the total amount of oil liquid supplied from the oil supply nozzle 4 based on the pulse signal of the flow rate pulse transmitter 11.
Reference numeral 13 indicates a relief passage, and reference numeral 14 indicates a pump unit having an air separator, a filter, a strainer and the like.

Next, the configuration of the oil supply nozzle 4 shown in FIG. 1 will be described in detail with reference to the sectional view of FIG.

Reference numeral 20 in FIG. 2 indicates a nozzle body connected to the hose 3 (see FIG. 1).
Is provided with an operation lever 21 which is rotatable around a fulcrum 21A. This operating lever 21 is the nozzle body
The opening degree of the nozzle valve 23 provided in the middle of the flow path 22 in 20 is adjusted, and the opening degree of the nozzle valve 23 is increased by the operator pulling the operation lever 21 upward in the figure. It is like this.

The nozzle valve 23 includes a valve body 24 including a main valve body 24A and a sub valve body 24B, a valve seat 25 that abuts on the valve body 24, and a valve shaft 26 that supports the valve body 24. That is, the valve body 24 is moved in the direction of arrow A by pulling up the operation lever 21 to form a flow path between the valve body 24 and the valve seat 25.

A compression spring 27 is provided between the nozzle body 20 and the valve body 24. The compression spring 27 moves the valve body 24 in the direction of the arrow B when the pulling up of the operation lever 21 is released so that the width of the flow path formed between the valve body 24 and the valve seat 25 is reduced. It is to reduce.

Further, the reference numeral 30 in FIG. 2 is an automatic valve 30. This automatic valve 30 is provided in the middle of the flow path 22 in the nozzle body 20, a valve seat 31 fixed to the nozzle body 20 side, and a valve body 32 abutting on the valve seat 31. A valve shaft 34 that supports the valve element 32 and a compression spring 34A that biases the valve element 32 toward the valve seat 31 side.

Further, a discharge pipe 35 to be inserted into a fuel tank of an automobile or the like is provided at the tip of the nozzle body 20, and a liquid of the oil liquid supplied into the fuel tank is provided at the tip position of the discharge pipe 35. A liquid level sensor 10 for detecting bubbles generated on the surface or the upper layer of the oil liquid is provided. This liquid level sensor 10
The detection signal is supplied to the control device 8 shown in FIG. 1 through the signal line 36.

The reference numeral 37 in FIG. 2 denotes a lever hook, which is the spring force of the compression spring 27 and the pump.
Against the pressure of the oil liquid discharged from 14, the operation lever 21 rotated around the fulcrum 21A is gradually locked at the positions shown at 37A and 37B, and the opening degree of the nozzle valve 23 is set to 2 It is possible to set in stages (an example).

Next, the control circuit in the control device 8 will be described together with its operation with reference to FIGS.

In the description of this control circuit, binary logic signals "1" and "O" are used.

This control circuit detects that the pump drive control section (a) for instructing the drive and stop of the pump motor 6 and the refueling (initial refueling, additional refueling) are completed, as indicated by the dotted lines in FIG. Flow rate pulse stop detection unit (B) and over-passage amount measurement unit (C) that measures the amount of over-passage during the initial refueling (described above in "Problems to Solve the Invention")
And a data selection section (d) for selecting selection data (judgment data) used as a criterion for determining that the tank is full, in accordance with the row passage amount measured by the row passage amount measuring section (c).
And an additional refueling amount measuring unit (e) for measuring the refueling amount (additional refueling amount) per additional refueling performed after the initial refueling, and the additional refueling measured by this additional refueling amount measuring unit (e) A full tank determination section (f) for comparing the detection data indicating the amount (refueling data) with the selection data selected by the data selection section (d) to determine whether the fuel tank is full Is the main component.

(1) First, when refueling is completed and the refueling nozzle 4 is hung on the nozzle hook 5, the output of the nozzle switch 9 becomes "0". The output "0" is inverted by the inverter gates denoted by reference numerals 38 and 39, and is supplied to the flip-flop denoted by reference numeral 40 (described later) and the row-over-amount counter denoted by reference numeral 41 (described later), respectively. As a result, both the flip-flop 40 and the row-over counter 41 are reset. Further, at this time, the output of the flip-flop indicated by the reference numeral 42 becomes "1" by the output "1" of the inverter gate 39 (at the time of refueling completion).

Then, in this state, when the refueling nozzle 4 is removed from the nozzle hook 5 of the weighing machine main body 1 and the output of the nozzle switch 9 becomes "1", the supply for counting the pulses output from the flow rate pulse transmitter 11 is performed. The quantity counter 43 is reset, and the indicator drive circuit 44 for changing the lubrication value shown on the lubrication quantity indicator 12 is driven to drive the lubrication quantity indicator 12
Is reset to 0 (at the start of refueling).

(2) When a predetermined refueling is performed and the output of the liquid level sensor 10 becomes "1", the output "1" is supplied to the S input of the flip-flop 45. As a result, the output of the flip-flop 45 changes from "1" to "0", and the AND
The outputs of the gates 46 and 47 sequentially become “0” and are input to the pump motor drive circuit 48.

This pump drive circuit 48 turns on the drive of the pump motor 6.
When the output of the AND gate 47 becomes "0", the drive of the pump motor 6 is stopped.

(3) When a predetermined refueling is performed and the output of the liquid level sensor 10 becomes “1”, the drive of the pump motor 6 is stopped as described in step (2), while the overtravel counter 41 causes the pump Lubrication amount after the motor 6 is stopped (passage amount)
Is measured. That is, the output pulse of the flow rate pulse transmitter 11 when the liquid level sensor 10 is “1” is AND
Counting through gates 51 and 52, which results in a fourth
An overrun amount at the time of initial refueling shown by (q ₀ + Δq ₀ ) in the figure is detected.

Incidentally, the output of the flip-flop 42, while the pulse at a predetermined interval is being emitted from the flow pulse generator 11,
It is "1", but this pulse interval is 400m, for example.
When the time becomes longer than sec, the output of the flip-flop 42 is set to "0" and the counting of the flow rate pulse is stopped. In other words, by the monostable multivibrator 53 and the inverter gate 54 shown by MM,
When the interval between the pulses transmitted from the flow rate pulse transmitter 11 becomes 400 m · sec or more set in advance, a trigger signal is output from the trigger signal transmitter 55 indicated by Tr, whereby the flip-flop 42 is set to “0”. Therefore, the measurement of the overrun amount by the overrun amount counter 41 is stopped.

The trigger signal output from the trigger signal transmitter 55 is supplied to the S input of the flip-flop 42 and the T input of the flip-flop 40 at the same time. The D input of
Since it is not judged to be full yet and is "1", the output of the flip-flop 40 is maintained at "1".

(4) The count value of the flow rate pulse transmitter 11 measured by the overrun amount counter 41 is supplied to the data selection circuit 56 as data (q ₀ + Δq ₀ ) indicating the overrun amount at the time of initial refueling. The data selection circuit 56 uses the number of pulses as the selection data Qc corresponding to the data (q ₀ + Δq ₀ ) indicating the stroke amount.
And selects one of the _{Qc 0 · Qc 1 · Qc 2} ·· Qc m from the selected data storage circuit 57.

As the selection data Qc stored in the selection data storage circuit 57, as shown in FIG. 5, the stroke amount (q ₀
+ [Delta] q ₀₎ the pulse count value _{a 0 · a 1 · a 2} ·· a n number of pulses _{Qc 0 · Qc 1 · Qc 2} ·· Qc m corresponding to the indicated respectively stored.

Then, the number of pulses Qc ₀ · Qc _{1 of} such selection data Qc
・ Qc ₂・ ・ Qc _m is a value indicating the amount of refueling (additional refueling amount) as the determination data for the full tank determination at the time of additional refueling performed after the initial refueling, and is the stroke amount (q ₀ + Δq ₀ )
Are stored in advance in the selected data storage circuit 57 in accordance with the count value (a ₀ · a ₁ · a ₂ ··· a _n ).

In other words, the stroke amount (q ₀ + Δq ₀ ) measured by the stroke amount counter 41 is the state of the power supply voltage as described above,
It changes sequentially depending on factors such as the condition of the hose (due to changes in elastic force), the size of the opening of the nozzle valve, and changes in the pressing force of the automatic valve, so selection based on the stroke amount with these factors taken into consideration. Number of pulses as data Qc (Qc ₀・ Qc ₁・ Qc
The ₂ · · Qc _m) appropriately set, but to keep is stored in advance as determination data in the selected data storage circuit 57.

The count value indicating the row excess amount (q ₀ + Δq ₀ ) and the count value indicating the selection data Qc shown in FIG. 5 are a ₀ <a ₁ <a ₂
<•• <a _n , Qc ₀ <Qc ₁ <Qc ₂ <•• <Qc _m .

Then, the selection data Qc selected by the data selection means 56 is supplied to the comparison circuit indicated by reference numeral 58.

The data selection circuit 56 selects the selection data Qc from the data selection storage circuit 57 when the output Q of the flip-flop 42 becomes "1".

(5) When the initial refueling is completed and the bubbles generated in the upper layer of the oil refueled in the fuel tank disappear, and the output of the liquid level sensor 10 becomes "0", the output of the inverter gate 59 " 1 ”, the timer 60 measures the set time t ₀ (see FIG. 4). This set time t ₀ is the time required to completely eliminate the bubbles from the upper layer of oil.

Then, after the set time t _{0 has} elapsed, the output of the timer 60 becomes “1” and the output of the flip-flop 45 becomes “1”.
As the pump motor drive circuit 48, the pump motor 6 is driven, and an additional oil supply amount counter 61 (described later)
Reset.

(6) When the driving of the pump motor 6 is restarted in the step (5), a pulse is again emitted from the flow rate pulse transmitter 11, and this pulse is counted by the additional oil supply amount counter 61. The count value counted by the additional oil supply amount counter 61 is supplied to the comparison circuit 58 as oil supply data (Q ₁ ′ + q ₁ + Δq ₁ ) indicating the additional oil supply amount.

It should be noted that refueling data (Q ₁ ′ + q ₁ + Δq ₁ ) indicating the additional refueling amount is sequentially supplied from the additional refueling amount counter 61 to the comparison circuit 58.

(7) In the comparison circuit 58, the selection data Qc supplied from the data selection circuit 56 (described above in step (4)) and the refueling data supplied from the additional refueling amount counter 61 (Q ₁ ′ + q ₁
+ Δq ₁ ) (described in step (6)), and as a result,
If it is determined that the data (Q ₁ ′ + q ₁ + Δq ₁ ) indicating the additional oil supply amount is smaller than the selection data Qc (that is, the fuel tank is full), the detection signal “0” is output. To be done.

(8) In the previous step (7), the detection signal output from the comparison circuit 58 causes the input D of the flip-flop 40 to become “0”, and thereafter, the trigger signal indicating that the additional refueling has ended is the trigger signal transmitter 55. The output of the flip-flop 40 changes from "1" to "0", whereby the outputs of the AND gates 46 and 47 sequentially change to "0", and the pump motor drive circuit 48 causes the pump motor 6 to operate. Stop driving.

During the above steps (2) to (8), the pulse output from the flow rate pulse transmitter 11 is continuously counted by the supply amount counter 43, and the count value is continuously counted. Is the display drive circuit 44
It is displayed on the lubrication amount indicator 12 as a value indicating the lubrication amount.

Further, in the above process (7), when the detection signal “0” indicating that the tank is full due to the first additional refueling is not output from the comparison circuit 58, the second additional refueling amount is the additional refueling amount counter. It will be measured by 61.
When the detection signal "0" indicating that the tank is full due to the second additional refueling is not output from the comparison circuit 58, the additional refueling is sequentially performed three times, four times, ... Will be performed (only one additional refueling is shown in the time chart of FIG. 4).

In the refueling device configured as described above, the running amount measured in the final stage of the initial refueling is the state of the power supply voltage,
It changes depending on factors such as the condition of the hose (due to changes in elastic force), the size of the nozzle valve opening, and the change in the pressing force of the automatic valve. How much when refueling (eg 0.2 liters / time)
It is determined in advance whether or not the oil liquid should be supplied, and this is stored in the selection data storage circuit 57 as a criterion (selection data) when performing additional oil supply.

Then, the refueling data (Q ₁ ′ + q ₁ + Δq ₁ ) obtained by the additional refueling performed after the initial refueling is compared with the selection data Qc stored in advance in the selection data storage circuit 57, and as a result, the fuel Since it is determined whether or not the tank is full, it is possible to predict the influence of the power supply voltage state, the hose state (due to the change in elastic force), etc. as described above and eliminate them. By doing this, for example, when full tank supply is made, the oil liquid overflows from the spout,
Further, the problem that the fuel tank is not filled with the oil liquid is prevented in advance.

The overrun amount measuring unit (c) shown in FIG. 3 corresponds to overrun amount measuring means, the additional refueling amount measuring unit (e) corresponds to the refueling data measuring device, and the data selecting unit (d) sets the judgment data. Corresponding to the means, the full tank determination section (f) corresponds to the full tank determination means, the pump drive control section (a) corresponds to the operation control section, and the pump 14, the pump motor 6, and the pump motor. The drive circuit 48 corresponds to the refueling stopping means.

"Modified Example" In this modified example, the number of times of refueling required until the fuel tank is full is replaced by replacing the determination element with the refueling amount per time in the "Example" for determining whether or not the fuel tank is full. (Modification (1); FIGS. 6 and 7) Refueling time per one time (Modification (2); FIGS. 8 and 9).

(1) The portion indicated by X (refueling information collecting means) of the above-described control device may be changed as shown in FIG. The liquid level sensor detection number counter 70 shown in FIG. 6 is reset when the output of the nozzle switch 9 becomes “0” by the inverter gate 71, and by the output of the liquid level sensor 10, The number of times the upper layer (liquid level or bubble) of the oil liquid supplied into the fuel tank is detected is counted, and this count value l (fueling data) (l = 1, l = 2 in FIG. 10). Is larger than a preset count value lc (selection data), the comparator circuit indicated by reference numeral 72 outputs a signal of "0" indicating that the tank is full.

The selection data Kc as the set value lc supplied to the comparison circuit 72 indicates the number of additional refueling performed after the initial refueling, as shown in FIG. _The numerical value corresponding to ₀ + Δq ₀ ) is preset in the selected data storage circuit 57.
Is stored in

In other words, the overrun amount measured by the overrun amount counter 41 is sequentially changed due to factors such as the above-mentioned fluctuations in the power supply voltage and the state of the hose (due to changes in elastic force). Overrun (q ₀ + Δ
Based on the count value (a ₀ · a ₁ · a ₂ · · a _n ) indicating q ₀ ),
Number of additional refueling as selection data Kc lc ₀・ lc ₁・ lc ₂・ ・ lc _m
(Lc) is appropriately determined and stored in the selection data storage circuit 57 in advance, and thereafter, the number of additional refueling operations (lc ₀ , lc ₁ , lc ₂ ,
• One of the (lc _m ) (lc) is the actual measured overrun amount (q ₀
The number of additional refueling counted by the liquid level sensor number detection counter 70 is an appropriate amount, which is appropriately selected according to the count value (a ₀ · a ₁ · a ₂ ··· a _n ) indicating + Δq ₀ ). It is used as a criterion for determining whether or not.

It should be noted that the additional refueling number lc ₀ · lc ₁ · lc ₂ ··· lc _m stored in the selection data storage circuit 57 is the pulse number (Qc ₀ · Qc ₁ · Qc ₂ ·· Qc _m in the “Example” above. 1), one of them is selected by the data selection circuit 56.

In addition, the number of pulses a ₀ · a ₁ · a ₂ indicating the overrun amount (q ₀ + Δq ₀ ).
And · · a _n, refueling number lc ₀ · lc ₁ · lc ₂ indicating the selected data Tc
The _{·· lc m, a 0 <a 1} <a 2 <··<a n ,lc 0> lc 1> lc 2>
・ ・ ＞ lc _m

(2) The portion indicated by X (refueling information collecting means) of the above-mentioned control device may be changed as shown in FIG. That is, a signal indicating that the pump motor 6 is driven or stopped is input, the detection signal of the liquid level sensor 10 is input via the inverter gate 74, and the oscillation signal of the time pulse oscillator 75 is input. And an output signal from the AND gate 76 is input, and a time pulse counter 77 which is reset by the timer 60 (same as that shown in FIG. 3) before the start of additional refueling is provided. The time being performed may be measured as the count value t of the time pulse (see FIG. 10).

Then, the value t counted by the time pulse counter 77 is coded as detection data (refueling data).
It is supplied to the comparison circuit shown by 78, and from this comparison circuit 78,
The value t counted by the time pulse counter 77 is a preset value tc (selection data) (described later).
When it becomes larger, it outputs a signal of "0" indicating that the tank is full.

The selection data Tc as the set value tc supplied to the comparison circuit 77 indicates the time of additional refueling after the initial refueling, as shown in FIG. _The number of pulses corresponding to ₀ + Δq ₀ ) is stored in advance in the selection data storage circuit 57.

That is, the selected data storage circuit 57 is loaded into the selected data storage circuit 57 (q ₀ + Δ
q ₀₎ corresponding to each pulse number _{a 0 · a 1 · a 2} ·· a n indicating the, and, in consideration of the factors such as variations in the power supply voltage as described above, the time the additional fuel supply time per pulse count number _{(tc 0 · tc 1 · tc} 2 ·· tc m (tc)) is previously stored as, the selection data storage circuit 57 in the stored additional lubrication time as selection data Tc (tc ₀ · tc ₁・ tc ₂・ ・ tc _m )
One, actually appropriately selected depending on the measured line overdose (q ₀ + Δq ₀₎ each pulse number _{a 0 · a 1 · a 2} ·· a n indicating the time of the additional fuel supply per time Is used as a criterion for determining whether or not is appropriate.

The additional refueling time tc ₀ · tc ₁ · tc ₂ ·· tc _m stored in the selection data storage circuit 57 is the pulse number (Qc ₀ · Qc ₁ · Qc ₂ ·· Qc in the above “Example”). One of them is selected by the data selection circuit 56 similarly to the selection of _m ).

Further, in FIG. 9, the pulse number a ₀ · a ₁ · a ₂ ·· a _n indicating the row overrun amount (q ₀ + Δq ₀ ) and the pulse number tc ₀ · tc ₁ · tc ₂ ··· indicating the selection data Tc are shown. tc _m means a ₀ <a ₁ <a ₂ <・ ・ <a _n ,
tc ₀ <a relationship of _{tc 1 <tc 2 <·· <} tc m.

Further, although the pump 14 is used as the refueling stopping means in these embodiments, the invention is not limited to this, and the pump 14 is simply driven / stopped in accordance with the output of the nozzle switch 9, and the broken line in FIG. As shown in FIG. 5, an electromagnetic valve 7 as a refueling stopping means is provided on the downstream side of the pump 14 in the pipe 2 to supply the output of the pump drive control section (a) shown in FIG. 3 to open and close the valve. Good.

Further, although the present invention has been described by taking the ground-based weighing machine as an example in these embodiments, the present invention can also be applied to a suspension weighing machine. In this case, the nozzle switch 9 is used.
An operation signal of the hose lifting switch or the like may be used instead of the output signal of.

[Advantage of the Invention] According to the present invention, the determination data storage circuit stores various kinds of determination data corresponding to the row passage amount in advance, and one of the determination data is based on the actually measured row passage amount. After selecting, compare with the refueling data at the time of additional refueling collected by the refueling information collecting means, and by this,
Whether or not the fuel tank is filled with the additional fuel is determined.

In other words, the overrun amount slightly changes due to factors such as the fluctuation of the power supply voltage, the condition of the hose (due to the change of the elastic force), the size of the opening of the nozzle valve, the change of the pressing force of the automatic valve, etc. , Various judgment data (for example, additional refueling amount per time, additional refueling time per time, number of additional refueling, etc.) according to changes in these overrun amounts are stored in advance in the judgment data storage circuit, and By selecting one of the judgment data based on the actual measured amount of overrun,
Even if the power supply voltage fluctuates or the like, it is possible to perform appropriate additional refueling corresponding to the factors such as the power supply voltage fluctuation.

Therefore, according to the present invention, the judgment data serving as the judgment criterion of whether or not the tank is full is appropriately selected on the basis of the passage amount measured at the time of initial refueling. Even if there are factors such as state changes,
This can be effectively dealt with, and as a result, the problem that the oil overflows from the spout when the tank is fully refueled and the problem that the oil does not fill the fuel tank is prevented.

[Brief description of drawings]

1 to 5 are views showing an embodiment of the present invention,
FIG. 1 is a schematic configuration diagram of an oil supply device, FIG. 2 is a cross-sectional view showing an oil supply nozzle, FIG. 3 is a view showing a control circuit of the oil supply device shown in FIG. 1, and FIG. 4 is an oil flow rate and liquid level. Time chart showing the relationship between ON / OFF of the sensor and pump motor, No. 5
The figure shows the contents of the selection data stored in the selection data storage circuit of FIG. 3, and FIGS.
A circuit diagram showing a first modification of the embodiment shown in FIG. 5 and a diagram showing the contents of selection data, FIGS. 8 and 9 are shown in FIGS.
FIG. 5 is a circuit diagram showing a second modification of the embodiment shown in FIG. 5 and a view showing the contents of selection data, FIG. 10 is a time chart for explaining the first and second modifications, and FIG. 4 is a time chart for explaining the problem of. (A) …… Pump drive control section (operation control means) (c) …… Overrun amount measuring section (overrun amount measuring means) (d) …… Data selection section (judgment data setting means) (e) …… Additional lubrication Amount measuring unit (measuring means for refueling data) (f) …… Full tank judging section (full tank judging means) 6 …… Pump motor 10 …… Liquid level sensor 11 …… Flow pulse transmitter 14 …… Pump (lubrication stopping means) )

Claims (1)

(57) [Claims] 1. A refueling device comprising: a pump for pumping up and discharging oil from an oil storage tank; and a refueling nozzle connected to a discharge side of the pump via a flow meter provided with a flow rate pulse transmitter. A liquid level sensor provided in the oil supply nozzle, an oil supply stop means provided in the flow passage upstream of the oil supply nozzle and allowing or stopping the supply of the oil liquid to the oil supply nozzle, and the oil supply stop means during the oil supply operation. When stopped, the flow rate pulse output from the flow rate pulse transmitter is counted to measure the overrun amount, and the refueling data for measuring the refueling data for full tank determination with refueling. Measuring means, determination data setting means for setting determination refueling data for full tank determination based on the excessive passage amount measured by the excessive passage amount measuring means, and setting by the determination data setting means And a fill level determination means for determining fullness by comparing the fill level data measured by the fill level measurement means and the fill level detection signal supplied from the level level sensor. A full tank determination signal is supplied from the full tank determination means,
The oil supply stop means is stopped by the input of the liquid level detection signal, the oil supply stop means is allowed to operate by the disappearance of the input of the liquid level detection signal, and the full tank determination signal is input regardless of the liquid level detection signal. An operation control means for stopping the operation of the oil supply stop means, and an oil supply device provided with the operation control means.