JPH0885598A - Fuel supply device - Google Patents

Abstract

PURPOSE: To provide a fuel supply device which is constituted to judge whether or not a vapor drawing pump is abnormal. CONSTITUTION: A fuel supply device has a sensor 14 for sensing concentration of vapor which is drawn from a port of a fuel tank by actuating a suction pump 16. In a control circuit 25, a judging program 25A which judges the type of fuel by comparing a threshold A with sensed values of the sensor 14 and a suction pump abnormality judging program 25B which judges that the pump 16 is abnormal when an output of the sensor 14 is smaller than a second reference value after the lapse of a predetermined time period after an oil feed nozzle 8 was inserted into a fuel tank are inputted.

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, and more particularly to an oil supply device having an oil type discrimination function added to prevent incorrect oil type oil supply.

[0002]

2. Description of the Related Art In gas stations, for gasoline supply,
An oil supply device is installed for each type of oil supply, such as for supplying light oil.

Therefore, in this type of refueling device, when refueling a fuel tank or the like of a customer's automobile, for example, a wrong oil is supplied by mistakenly using a refueling device for supplying light oil when gasoline should be supplied. In order to prevent seed oiling accidents, there is a tendency to be equipped with a function of preventing different oil type oiling and a function of discriminating all oil types. Then, in the fuel supply device having the oil type discrimination function, the saturated vapor pressure (vapor concentration) differs between gasoline and light oil. That is, paying attention to the characteristics that gasoline has a high vapor concentration and light oil has a low vapor concentration, one end has an opening at the tip of the refueling nozzle and the other end detects the vapor concentration in the middle of the suction pipe connected to the suction pump. The oil type sensor is installed so that the vapor (oil vapor) of the residual oil liquid passes through the opening at one end of the suction pipe before the oil liquid is discharged from the oil supply nozzle into the fuel tank where the oil supply nozzle is inserted. It is sucked by a vapor suction pump and applied to an oil type sensor to detect the oil vapor concentration.

Then, the detected oil vapor concentration and the output level corresponding to the concentration are output to the oil type discriminating apparatus. If the output level is high, it is discriminated that the oil liquid remaining in the fuel tank is light oil. However, refueling becomes possible and the refueling pump is activated only when the type of oil remaining in the fuel tank matches the type of oil supplied from the refueling device.

As the oil type sensor, a semiconductor type gas sensor for detecting the vapor type oil type vapor concentration is used. The electrical characteristics, that is, the resistance value changes according to the oil vapor concentration. This change in resistance value is output as a change in output voltage. Therefore, if the oil vapor contained in the gas is large, a high output voltage is output, and conversely, if the oil vapor contained in the gas is small, a low output voltage is output.

In the oil supply device having the oil type sensor, when the sensor output becomes high even though the oil supply nozzle is not inserted in the fuel tank, the vapor remains in the suction pipe line or the oil type sensor, It is determined that the cleaning is defective after the seed detection.

[0007]

However, in the conventional oil supply device, it has been possible to determine whether or not there is an abnormality in the oil type sensor by the increase in the sensor output of the oil type sensor, but the sensor output of the oil type sensor does not increase. In this case, the oil type sensor is abnormal, or the vapor suction pump that supplies the vapor in the fuel tank to the oil type sensor has failed and the vapor in the fuel tank cannot be supplied to the oil type sensor. I didn't know if there was something wrong with the vapor suction pump.

In the above case, if the sensor output of the oil type sensor does not rise within a certain time, only the fact that the oil type determination is impossible is notified.

Therefore, when the repair is performed, the repair operator does not know whether the oil type sensor is abnormal or the vapor suction pump is abnormal. Therefore, both are investigated and repaired. , It took a long time to repair.

For this reason, the operator of the gas filling station, despite the fact that the oil supply device is provided with an oil type determination function, will find that the operator himself / herself will not be able to use the oil type due to the odor or the like in the fuel tank until the repair is completed. Therefore, there was no choice but to carry out refueling, and in such a case there was still a possibility of causing an accidental refueling accident.

Therefore, an object of the present invention is to identify an abnormal portion in oil type discrimination in order to shorten the repair time of an oil supply device having an oil type discrimination function.

[0012]

SUMMARY OF THE INVENTION According to the present invention, one end of a fueling nozzle provided at the tip of a hose communicating with a liquid feeding means is opened at one end, and a vapor for sucking oil vapor in a fuel tank from the opening is formed. A suction means connected to the other end of the suction means and a midway of the suction means, detecting the concentration of oil vapor sucked by the vapor suction means and outputting an output value according to the detected value. When the oil type sensor detects the oil type of the fuel tank by the output based on the oil vapor concentration from the oil type sensor and determines that the oil type is different from the oil type of the oil liquid supplied to the fuel tank. In an oil supply device comprising a different oil type oil supply prevention control means for prohibiting the supply of oil liquid to the oil supply nozzle by the liquid supply means, when the oil vapor suction means is normal, the oil vapor in the opening is Detects when it reaches the oil type sensor A storage unit that stores in advance a required time as a reference required time, and a required time from when the oil vapor suction unit is activated until the oil type sensor detects that the oil vapor has reached the oil type sensor. Measuring means for measuring time is compared with the required time measured by the measuring means and the reference required time stored in the storage means, and an abnormal suction signal is output when the required measurement time is larger than the reference required time. And a notification means for notifying that the oil vapor suction means is abnormal based on the suction abnormality signal of the suction abnormality determination means.

[0013]

The time required for the oil vapor sensor to detect that the oil vapor has reached the oil vapor sensor is measured, and the time required for measurement and the reference stored in the storage means are measured. By comparing the required time and outputting the suction abnormality signal when the measurement required time is longer than the reference required time, and notifying that the oil vapor suction means is abnormal based on this suction abnormality signal It is possible to inform the operator that the oil vapor suction means is abnormal.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of an oil supply device according to the present invention.

In the figure, 1 is a fixed-type weighing machine provided on the premises of a gas station, 2 is piping installed in the weighing machine 1, and a pump motor 3 drives the piping 2 in the middle thereof. A pump 4 and a flow meter 5 for measuring the amount of oil supply are provided. Further, the flow meter 5 is equipped with a flow rate pulse transmitter 6 which transmits a flow rate pulse proportional to the flow rate.

Reference numeral 7 denotes an oil supply hose whose base end side is connected to the pipe 2, and 8 denotes an oil supply nozzle provided at the tip of the oil supply hose 7. The oil supply nozzle 8 is a discharge pipe by opening a nozzle lever. The oil liquid is discharged from 8A into the fuel tank.

A nozzle hook 9 is provided on the side surface of the weighing machine 1, and is a portion to which the oil supply nozzle 8 is hooked and unhooked. The nozzle hook 9 is provided with a nozzle switch 10 which is turned on and off in association with the unplugging of the fueling nozzle 8 to detect whether or not the fueling operation by the fueling nozzle 8 is being performed. Therefore, when the refueling nozzle 8 is removed from the nozzle hook 9, the nozzle switch 10 is turned on and outputs a refueling operation in-progress signal to the control circuit 25, which will be described later, indicating that refueling operation is in progress.

Reference numeral 11 denotes a full tank sensor provided at the tip of the discharge pipe 8A of the fueling nozzle 8, which is composed of, for example, an ultrasonic sensor composed of a pair of ultrasonic transmitting element and receiving element, and is inside a fuel tank (not shown). When it is immersed in the liquid surface, the full tank detection signal is output to the control circuit 25.

Further, a nozzle insertion sensor 15 for detecting that the discharge pipe 8A is inserted into a fuel supply port (not shown) of the fuel tank is provided at the tip of the discharge pipe 8A of the fuel supply nozzle 8. . This nozzle insertion sensor 15
Is composed of, for example, an optical sensor, and outputs a nozzle insertion detection signal to the control circuit 25 when the discharge pipe 8A is inserted into a fuel supply port (not shown) of the fuel tank.

Reference numeral 12 is a suction hose as an oil vapor suction pipe line provided along the oil supply hose 7. One end extends to the tip of the discharge pipe 8A of the oil supply nozzle 8 and the oil vapor suction is opened at the tip of the discharge pipe 8A. It is mouth 12A. The other end of the suction hose 12 extends into the weighing machine 1 and is connected to an electromagnetic three-way valve 13, and the electromagnetic three-way valve 13 branches into an intake hose 12B and an exhaust hose 12C. Further, the ends of the intake hose 12B and the exhaust hose 12C open via an intake pump 16 and an exhaust pump 17, which will be described later.

Reference numeral 14 denotes an oil type sensor which is arranged in the middle of the suction hose 12 and detects the oil type of the oil vapor supplied from the suction hose 12, and which corresponds to the oil vapor concentration of the oil type stored in the fuel tank. Output an oil type detection signal. Further, the oil type sensor 14 is a gas sensor for general combustible gas, for example, from sintered semiconductor sensor added with palladium or the like as an additive in the tin oxide, C _n gasoline, such as light oil or the like
The resistance value changes according to the vapor concentration of the hydrocarbon containing H _{2n + 2} saturated hydrocarbon (gasoline; n = 4 to 12, light oil n = 15 to 20).

Therefore, the oil type sensor 14 is the suction hose 1
The output voltage changes depending on the oil type of the oil vapor supplied from 2, and outputs an oil type detection signal having a voltage corresponding to the oil vapor concentration to the control circuit 25. That is, the resistance value of the oil type sensor 14 is gasoline, light oil, alcohol gas (methyl alcohol; CH
₃ OH, isopropyl alcohol; CH3CH (OH)
Regardless of the type of (OH) is attached to all CH3, it depends only on the hydrocarbon gas concentration and has no gas selectivity.

Reference numeral 16 is an intake pump (vapor suction pump)
The suction hose 1 is installed in the middle of the intake hose 12B.
Exhaust the air in 2 and oil vapor in the fuel tank (vapor)
Aspirate. The intake pump 16 is composed of a motor and a gas pump for intake (both not shown) driven by the motor. When the motor is driven, air is introduced into the suction hose 12 so that the oil vapor is removed. Oil vapor in the fuel tank is sucked from the suction port 12A.

Reference numeral 17 denotes an exhaust pump which is provided in the middle of the exhaust hose 12C and supplies air into the suction hose 12 so that the oil vapor remaining in the suction hose 12 and each of the sensors 1 described above.
The oil vapor adhering to 4, 4 is exhausted from the oil vapor suction port 12A. The exhaust pump 17 is a motor and an exhaust gas pump driven by the motor (both not shown).
And the suction hose 12 when the motor is driven.
Air is introduced into the interior of the fuel tank and the oil vapor in the fuel tank is discharged from the oil vapor suction port 12A.

On the other hand, 18 is a display device provided on the front panel of the weighing machine 1, which is a lubrication amount indicator 19 for displaying the lubrication amount.
And a liquid crystal display (notifying means) 20 for displaying a message such as an oil type sensor / suction pump abnormality notification, an oil type determination result, and an operation error during an oil type determination operation.

Reference numeral 22 denotes an external input device provided on the side panel of the weighing machine 1, which has a setting key 23 and a setting display 24 for displaying the setting contents by operating the setting key 23. The setting key 23 has a function of inputting the type of oil used for the weighing machine 1 to the control circuit 25, and a function of inputting a preset value at the time of preset refueling, a refueling unit price, and the like.

Further, the control circuit 25 comprises, for example, a microcomputer, and the input side thereof has the above-mentioned flow rate pulse transmitter 6, nozzle switch 10, oil type sensor 14,
The nozzle insertion sensor 15, the external input device 22, etc. are connected, and the pump motor 3, the intake pump 16, the exhaust pump 17, the display device 18, etc. are connected on the output side.

Then, the storage area of the control circuit 25 (RA
M or ROM), an oil type determination program 25A and an intake pump abnormality determination program 25B as programs for an oil type determination process described later, a threshold value A of the output voltage of the oil type sensor 14, and a refueling nozzle 8 outside the nozzle hook 9. After that, the output voltage of the oil type sensor 14 starts to rise (in FIG. 3,
A predetermined time T1 from when Va starts to rise) and a predetermined time T2 from when the oil supply nozzle 8 is inserted into the fuel tank until when the output voltage of the oil type sensor starts to rise (in FIG. 3, it starts to rise from Vb). Is remembered.

The oil type discriminating program 25A sets a threshold value A for the detection value of the oil type sensor 14, and discriminates the oil type (gasoline or light oil) by comparison after this threshold value.

The intake pump abnormality determination program 25B is
The time required until the output voltage of the oil type sensor 14 starts to rise after the fueling nozzle 8 is removed from the nozzle hook 9 is measured, and the measured time required and the predetermined time T stored in advance.
When 2 is compared and the required time is longer than the predetermined time T2, it is determined that the intake pump 16 is abnormal.

Reference numeral 26 is an oil type determination cancel switch provided on the oil supply nozzle 8, and the oil type determination process is canceled by the operation of the operator. Therefore, when the oil supply nozzle 8 is removed from the nozzle hook 9 and the nozzle switch 10 is turned on and then the oil type determination release switch 26 is turned on, the control circuit 25
Does not execute the oil type determination process, and when the nozzle switch 10 is turned on, the pump motor 3 is activated to enable the oil supply.

Generally, gasoline and light oil are mostly used as oil types handled at gas stations. Therefore, in the present embodiment, the case of determining the oil type of gasoline and light oil will be described as an example.

Gasoline and light oil are of the same hydrocarbon type,
Although the main component is a saturated hydrocarbon _{(C n H n + 2)} , the number of atoms, gasoline C ₄ -C _12, light oil C ₁₅ -C ₂₀
It is composed of components in the range of. That is, light oil is composed of components having a high boiling point (boiling point 250 to 300 ° C), and gasoline is composed of components having a low boiling point (boiling point 30 to 150 ° C).
Therefore, the oil vapor concentration of light oil is low, and the oil vapor concentration of gasoline is high.

When discriminating between such light oil and gasoline, the oil type sensor 14 has the characteristics shown in FIG. 2 (A). That is, the resistance value of the oil type sensor 14 changes according to the gas concentration of the sucked oil vapor, and the difference between the resistance values of gasoline and light oil is large due to the difference in the above-mentioned boiling points. Both can be easily discriminated by the magnitude of the voltage.

Therefore, in this embodiment, as shown in FIG. 2B, the threshold value A of the output voltage of the oil type sensor 14 is set. Therefore, the threshold value A is set to such a value that the detected value of gasoline becomes the level A or higher and the detected value of light oil becomes the level A or lower.

The output voltage of the oil type sensor 14 changes as shown in FIG. That is, the output change of the oil type sensor 14 is the first step in which the intake pump 16 is activated to detect the dilute oil vapor generated from the oil liquid adhering to the discharge pipe 8A. It is divided into the second stage in which the oil vapor (vapor) sucked from the fuel tank by being inserted into the tank is detected.

In FIG. 3, when the refueling nozzle 8 is locked by the nozzle hook 9, the intake pump 16 is not yet in operation, so the output voltage of the oil type sensor 14 is at the low level Va. When the refueling nozzle 8 is removed from the nozzle hook 9 and the nozzle switch 10 is turned on, the intake pump 16 is started, and the dilute oil vapor generated from the oil liquid initially attached to the discharge pipe 8A is supplied to the oil type sensor 14. To be done. Therefore, the output voltage of the oil type sensor 14 rises after the time T1 has elapsed since the intake pump 16 was started, and the time T3 (= T1 + Δ
After the elapse of T), ΔV (output amount based on the detected lean oil vapor concentration) increases and changes from Va to Vb.

Therefore, if the time required for the output of the oil type sensor 14 to rise from the start of intake by the intake pump 16 is longer than the predetermined time T1, it takes time for the vapor to reach the oil type sensor 14, It can be seen that there is an abnormality in the intake pump 16, such as a decrease in the suction force of the intake pump 16.

When the discharge pipe 8A of the fueling nozzle 8 is inserted into the fueling port of the fuel tank, the oil vapor in the fuel tank is sucked by the intake pump 16 and supplied to the oil type sensor 14 via the suction hose 12. To be done. Therefore, the output voltage of the oil type sensor 14 sharply increases after time T2 after the nozzle insertion sensor 15 provided at the tip of the discharge pipe 8A is inserted into the fuel filler port of the fuel tank and outputs the detection signal.

Therefore, it takes time for the output voltage of the oil type sensor 14 to start rising after the discharge pipe 8A is inserted into the fuel filler port of the fuel tank, and the suction force of the intake pump 16 is reduced. It can be seen that the intake pump 16 is abnormal.

Here, in the refueling device having the above-mentioned configuration, the suction pump abnormality determination processing executed by the control circuit 25,
The oil type determination process will be described with reference to the flowcharts of FIGS. 4 to 6. Note that the refueling nozzle 8 of the refueling device is for gasoline refueling, and the processing for determining an abnormality in the oil type sensor is the same as in the prior art, so description thereof will be omitted.

In FIG. 4, the control circuit 25 operates in step S1.
Nozzle switch 1
Checking if 0 has been switched on,
When a worker at a gas station removes the fuel nozzle 8 from the nozzle hook 9, the nozzle switch 10 is turned on. Then, when the nozzle switch 10 is turned on, the process proceeds to S2, and an intake signal is output.

As a result, the electromagnetic three-way valve 13 is switched so that the oil vapor suction port 12A of the suction hose 12 and the intake hose 12B communicate with each other, and the intake pump 16 is activated. Therefore, the thin oil vapor generated by the oil liquid adhering to the inside of the discharge pipe 8A is supplied to the oil type sensor 14. Then, in S3, the timer is reset and started (time counting is started).

In the next S4, the output voltage from the oil type sensor 14 is read. Then, in S5, the oil type sensor 14
It is checked whether the output voltage of 1 has started to rise from Va before the intake pump 16 is activated (see FIG. 3). And S
When the output voltage starts rising from Va in 5, the process proceeds to S6, and S4 and S continue until the output voltage starts rising from Va.
The process of 5 is repeated.

In S6, it is checked whether or not the count value (measurement required time) of the timer when the output power starts increasing in S5 is larger than the predetermined time T1.

At this time, the lean oil vapor generated from the oil liquid adhering to the inside of the discharge pipe 8A when the intake pump 16 is started is supplied to the oil type sensor 14, so that the intake pump 16
The output voltage of the intake pump 1 when the
6 will start rising after time T1 from the start.

Therefore, in S6, when the count value of the timer is larger than the predetermined time T1, the intake pump 16
Is determined to be abnormal, and the process proceeds to S14 described later. S14
Then, a message such as "abnormal intake pump" is displayed on the liquid crystal display 20 to notify the operator. Therefore, the worker requests the maintenance company that repairs the intake pump 16 for the repair, and turns on the oil type determination release switch 26 for the time being.

If the count value of the timer is less than or equal to the predetermined time T1 in S6, it is determined that the intake pump 16 is normal and the process proceeds to S9.

Here, when the worker inserts the discharge pipe 8A of the fueling nozzle 8 removed from the nozzle hook 9 into the fueling port of the fuel tank, the oil vapor of the fuel tank is discharged from the discharge pipe 8A of the fueling nozzle 8 into the suction hose 12. And is supplied to the oil type sensor 14 provided in the middle of the suction hose 12.

At the next step S9, it is checked whether or not the nozzle insertion sensor 15 provided at the tip of the discharge pipe 8A is inserted into the fuel filler port of the fuel tank to output a detection signal, and the operator checks the fuel filler nozzle 8 When the nozzle insertion sensor 15 is turned on by inserting the discharge pipe 8A into the fuel filler port of the fuel tank, the process proceeds to S10 to start the timer.

In the next S11, the output voltage from the oil type sensor 14 is read. Then, in S12, it is checked whether or not the output voltage of the oil type sensor 14 has started to rise from Vb (see FIG. 3). Then, in S12, the output voltage is V
When it starts to rise from b, the process proceeds to S13, and the processes of S11 and S12 are repeated until the output voltage starts to rise from Vb.

In S13, the count value of the timer when the output voltage starts to rise in S12 (measurement required time)
Is greater than the predetermined time T2.

At this time, since the discharge pipe 8A is inserted into the fuel tank, the oil vapor in the fuel tank is supplied to the oil type sensor 14. Therefore, when the intake pump 16 is functioning normally, the output is obtained. The voltage starts to rise after time T2 after the discharge pipe 8A is inserted into the fuel tank, that is, after the nozzle insertion sensor 15 detects the insertion.

Therefore, when the count value of the timer is larger than the predetermined time T2 in S13, the intake pump 16
Is determined to be abnormal, and the process proceeds to S14 described later. S14
Then, a message such as "intake pump abnormality" is displayed on the liquid crystal display 20 to notify the operator. Therefore,
The operator requests the maintenance company that repairs the intake pump 16 to perform the repair, and for the time being, sufficiently checks the oil type of the fuel tank and then turns on the oil type determination release switch.

In S15, it is confirmed whether or not the oil type determination release switch 26 has been operated to release the oil type determination process. Therefore, when the oil type determination release switch 26 is turned on, the process proceeds from S15 to S20 described later.
As a result, the control circuit 25 does not execute the oil type determination process, and when the nozzle switch 10 is turned on, the pump motor 3
To start refueling.

In this way, since the abnormality of the oil type sensor 14 or the intake pump 16 is displayed in S14, the intake pump 1
When 6 fails and is repaired, the operator only needs to repair the faulty part based on the content displayed on the liquid crystal display 20 (intake pump abnormality), so the repair can be performed in a short time. Therefore, it is considered that the oil type sensor 14 is out of order even though the intake pump 16 is out of order as in the conventional case, and the oil type sensor 14 is replaced with a new one, or the oil type sensor 14 is replaced with a new one.
Even if you inspect the circuit to which is connected, the waste that the oil type judgment function does not return to normal can be eliminated.

Therefore, the operator at the gas filling station cannot determine the oil type due to a failure of the intake pump 16 despite the oil type determining function provided in the fueling device, and the fuel tank until the repair is completed. The inconvenience of having to determine the oil type due to the odor in the interior is eliminated in a short time.

When the count value of the timer is less than the predetermined time T2 in S13, the intake pump 16 is determined to be normal and the process proceeds to S16.

In the next step S16, it is checked whether the output voltage of the oil type sensor 14 is level A or higher. If the output voltage of the oil type sensor 14 is level A or lower, step S1 is performed.
7, the fuel type of the fuel tank is determined to be light oil (see FIG. 2). In the next S18, the pump motor 3 is not started, the refueling is prohibited, and a message such as "light oil refueling is not possible" is displayed on the liquid crystal display 20 to inform the operator. Then, the process proceeds to S40 described below to perform the cleaning process.

However, in S16, when the output voltage of the oil type sensor 14 is equal to or higher than the level A, the process proceeds to S19, and the oil type of the fuel tank is determined to be gasoline. Then, in S20, for example, "gasoline refueling O
In addition to displaying "K", the pump motor 3 of the refueling pump 4 is activated to enable refueling.

After the oil type in the fuel tank is determined to be gasoline in S19, or the oil type determination release switch 26 is turned on in S15 to cancel the oil type determination process and start the refueling pump 4. The process proceeds to S21 to end the oil type determination process, and the output of the intake signal to the intake pump 16 is stopped.

At the next step S22, the exhaust pump 17 is started and the electromagnetic three-way valve 13 is switched to the exhaust hose 12C side to exhaust the oil vapor sucked into the intake hose 12 from the oil vapor suction port 12A. Then, in S23,
When the nozzle lever of the refueling nozzle 8 is opened to start refueling, refueling measurement processing is performed. That is, the refueling nozzle 8
When the valve is opened, the gasoline in the underground tank (not shown) is pumped up by the pump 4 and supplied to the fuel tank through the pipe 2, the fuel supply hose 7, and the fuel supply nozzle 8.

The refueling amount of the gasoline thus refueled is measured by the flow meter 5, and a flow rate pulse corresponding to the flow rate is output from the flow rate pulse transmitter 6 to the control circuit 25. And
The measured refueling amount is displayed on the refueling amount indicator 19.

In the next step S24, when the full tank sensor 11 provided at the tip of the discharge pipe 8A is turned on, the signal from the full tank sensor 11 is read as a liquid level detection signal for detecting the liquid surface of the oil liquid in the fuel tank. .

In the next step S25, it is determined whether or not the liquid level is full based on the presence / absence of the liquid level detection signal. When it is determined in S25 that the fuel tank is full, the liquid level of the oil liquid in the fuel tank has risen to the vicinity of the fuel filler port, and the fuel filler nozzle 8
The tip of the discharge pipe 8A is in contact with the liquid surface of the oil liquid.

Therefore, the process proceeds to S26, the output of the pump drive signal is stopped, and the pump motor 3 is stopped. Then, in S27, an exhaust timer for evaporating the oil vapor in the intake hose 12 is started in order to delay the operation of the exhaust pump 17 already driven in S22.

The worker removes the fueling nozzle 8 of the fuel tank from the fueling port and hangs it on the nozzle hook 9. Further, in S28, it is checked whether or not the nozzle switch 10 is turned off. When the nozzle switch 10 is turned off, it is judged that the refueling nozzle 8 is returned to the nozzle hook 9 and the refueling work is completed. .

If there is no liquid level detection signal in S25, the process proceeds to S29 to check whether the nozzle switch 10 is turned off. If the nozzle switch 10 is on in S29, it is determined that refueling is in progress, the process returns to S23, and the processes of S23 to S25 are repeated.
However, in S29, when the nozzle switch 10 is off, it is determined that the refueling nozzle 8 has returned from the nozzle hook 9, and the process proceeds to S30, in which the output of the pump drive signal is stopped and the pump motor 3 is stopped. . And S31
Start the exhaust timer with.

As described above, when the exhaust pump 17 is driven, the oil vapor sucked from the oil vapor suction port 12A of the intake hose 12 passes through the exhaust pump 17, the oil type sensor 14, and the intake hose 12 and the oil vapor is discharged. It is discharged into the atmosphere from the suction port 12A. During this time, the oil vapor remaining in the intake hose 12 and the oil vapor attached to the oil type sensor 14 are diffused by the air blow during the exhaust, and the cleaning process is performed.

When the nozzle switch 10 is turned off in S28 or after the exhaust timer is started in S31, the process proceeds to S32 shown in FIG. 6 and the exhaust timer measurement time is necessary for the preset cleaning process. It is checked whether or not a predetermined time has passed. In S32, when the measured time of the exhaust timer has passed the predetermined time, the process proceeds to S33, the output of the exhaust signal is stopped, and the exhaust pump 17 is stopped.

Then, in S34, the exhaust timer is reset to end the cleaning process and the series of oil supply processes.

When the time measured by the exhaust timer does not exceed the predetermined time in S32, the process proceeds to S35, and it is checked whether the nozzle switch 10 is turned on. If the nozzle switch 10 is off, S3
Return to 2.

However, when the nozzle switch 10 is turned on in S35, it means that the refueling nozzle 8 is being removed from the nozzle hook 9 during the cleaning process to start the next refueling work. For example, a message such as “during cleaning process, refueling is not possible” is displayed on the liquid crystal display 20 to notify the operator of the error. This error notification continues until the refueling nozzle 8 is returned to the nozzle hook 9 and the nozzle switch 10 is turned off (S37), and when the nozzle switch 10 is turned off, the error notification is stopped (S38). After the error notification is stopped, the process returns to S32 and the processing of the exhaust timer is continued.

After the refueling prohibition process of S18, the process proceeds to S40 shown in FIG. 6 to stop the output of the intake signal and stop the output of the intake signal to the intake pump 16. Next S4
In No. 1, the exhaust signal is output to activate the exhaust pump 17, and the electromagnetic three-way valve 13 switches to the exhaust hose 12C side to exhaust the oil vapor sucked into the intake hose 12 from the oil vapor suction port 12A.

Further, in S42, the nozzle switch 10
Check if is turned off. Then, the refueling nozzle 8 is returned to the nozzle hook 9 and the nozzle switch 10
When is turned off, the process proceeds to S43, and the timer is reset. After that, the above-described processing of S32 and thereafter is executed.

In the above embodiment, the description has been made on the basis of discriminating between gasoline and light oil, but it goes without saying that other types of oil may be discriminated.

In the above embodiment, the intake pump 16 is operated by a timer interrupt to check whether the intake pump 16 is abnormal even when the oil supply nozzle 8 is hung on the nozzle hook 9 and the fuel supply operation is not performed. Is also good.

In the above embodiment, the liquid crystal display 20 is used as the notifying means to display the fact that the oil type sensor 14 is abnormal and the suction pump 16 is abnormal to notify the refueling operator. However, the present invention is not limited to this as long as it can inform the refueling operator that the oil type sensor 14 is abnormal and the suction pump 16 is abnormal. For example, a voice or notification is given by using a voice generation means (such as a talker or a buzzer). A configuration may be used in which a refueling worker is notified by sound that the oil type sensor 14 is abnormal and the suction pump 16 is abnormal.

[0079]

As described above, according to the present invention, the time required from the activation of the oil vapor suction means until the oil type sensor detects that the oil vapor has reached the oil type sensor is measured. , Compares the measurement required time with the reference required time stored in the storage means, outputs a suction abnormality signal when the measurement required time is longer than the reference required time, and based on this suction abnormality signal, the oil vapor By notifying that the suction means is abnormal, it is possible to inform the operator that the oil vapor suction means is abnormal. Therefore, when the repair is carried out, the failure point (vapor suction pump) can be immediately repaired, so that it is not necessary to search for the failure point, the repair time can be shortened as compared with the conventional case, and the oil type determination function is provided. Nevertheless, it is possible to quickly eliminate the inconvenience that the operator cannot determine the oil type due to a failure of the vapor suction pump and the operator determines the oil type due to the odor in the fuel tank until the repair is completed.

[Brief description of drawings]

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

FIG. 2 is a graph for explaining characteristics of an oil type sensor.

FIG. 3 is a graph for explaining characteristics of the oil type sensor at the start of detection.

FIG. 4 is a flowchart of an oil type sensor / intake pump abnormality determination process executed by a control circuit.

5 is a flowchart of an oil type determination and refueling process that is executed subsequent to the process of FIG.

FIG. 6 is a flowchart of a cleaning process executed subsequent to the processes of FIGS. 4 and 5.

[Explanation of symbols]

 1 Measuring Machine 3 Pump Motor 4 Pump 5 Flowmeter 7 Refueling Hose 8 Refueling Nozzle 9 Nozzle 10 Nozzle Switch 12 Suction Hose 13 Three-way Solenoid Valve 14 Oil Type Sensor 15 Nozzle Insertion Sensor 16 Intake Pump 17 Exhaust Pump 18 Display Device 19 Amount of Oil Supply Display 20 Liquid crystal display 25 Control circuit

Claims (1)

[Claims] 1. A vapor suction means for sucking oil vapor in a fuel tank from the opening is connected to the other end of the oil supply nozzle provided at the tip of a hose communicating with the liquid feeding means. A suction line, an oil type sensor provided in the middle of the suction line, for detecting the concentration of the oil vapor sucked by the vapor suction means, and outputting an output value corresponding to the detected value, and the oil type sensor. The oil type of the fuel tank is detected by the output based on the oil vapor concentration from the seed sensor, and when it is determined that the oil type is different from the oil type of the oil liquid to be supplied to the fuel tank, to the oil supply nozzle by the liquid feeding means In the oil supply device consisting of the different oil type oil supply prevention control means for prohibiting the supply of the oil liquid, when the oil vapor suction means is normal, it is possible that the oil vapor in the opening has reached the oil type sensor. Based on the time required to detect A storage unit that stores the required time in advance, and a measuring unit that measures the time required from the activation of the oil vapor suction unit until the oil type sensor detects that the oil vapor has reached the oil type sensor. A suction abnormality determination means for comparing the measurement required time by the measurement means with a reference required time stored in the storage means, and outputting a suction abnormality signal when the measurement required time is longer than the reference required time, An oil supply device comprising: a notification unit that notifies that the oil vapor suction unit is abnormal based on the suction abnormality signal of the suction abnormality determination unit.