JPH0648496A - Automatic fuel oil feed device for filling tank - Google Patents

Abstract

PURPOSE:To rapidly feed fuel oil to a tank until it is filled with fuel oil without causing the liquid or bubbles of fuel oil to overflow by a method wherein, when the outlet quantity of fuel oil is restricted by detecting a fixed quantity of fuel oil fed after starting the first fuel oil feed or by detecting the liquid or bubbles of fuel oil within a period of fuel oil feed time, fuel oil feed after such a detection is returned to a large flow rate. CONSTITUTION:In an automatic fuel oil feed device 1 for filling a tank, when a liquid level sensor S1 disposed in the vicinity of a fuel oil feeding nozzle 10 detects the liquid or bubbles of fuel oil, a tank filling decision circuit 26 closes a flow rate control valve V1 through a valve control circuit 24 and stops a motor 23 by a predetermined period of time through a motor control circuit 21. Further, the tank filling decision circuit 26 decides whether a flow rate reaches a quantity of fuel oil to be fed, which is set by a setting means 27, after receiving the first input signal from a flow rate pulse oscillator 17 related to a flow rate meter 6. If it does not reach the set quantity, the motor 33 is driven to operate a pump 3, and the fuel oil is fed at a small flow rate through a bypass pipe passage 16. Furthermore, when a predetermined period of time elapses after the motor 23 is driven again, the flow rate control valve V1 is opened to shift to a large flow rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic filling oil supply device called a fully automatic oil supply system.

[0002]

2. Description of the Related Art FIG. 4 is a timing chart for explaining a typical prior art. Fuel oils such as regular gasoline, high-octane gasoline and light oil are stored in a storage tank buried underground in the gas station, and these fuel oils are pumped up by a pump and sent under pressure to a fueling nozzle. The refueling nozzle has a refueling nozzle main body held by a refueling operator and a discharge pipe bent and extending from the main body, and a liquid detection means for detecting liquid or bubbles of the fuel oil is provided at the tip of the discharge pipe. It is provided. When performing a full refueling, pull the operation lever provided on the refueling nozzle main body with the discharge pipe of the refueling nozzle inserted in the refueling port of the fuel tank of the vehicle receiving the refueling The manual flow rate control valve is opened to discharge the fuel oil from the discharge pipe to supply the fuel into the fuel tank.

That is, when the fueling nozzle is removed from the nozzle case at time t1, the pump starts the pumping operation,
When the discharge pipe of the refueling nozzle is inserted into the refueling port of the fuel tank of the vehicle that has received refueling and the operation lever of the refueling nozzle is pulled at time t2, the manual flow control valve is opened and pressure is fed by the pump. Fuel oil is discharged from the discharge pipe. At this time, the electromagnetic valve interposed in the oil supply path connecting the pump and the oil supply nozzle is closed, and the bypass valve communicating with the upstream side and the downstream side of the oil supply path with respect to this electromagnetic valve is, for example, 10 to 10. With the flow rate limited to about 12 liters / minute, set time W until time t3
After refueling about 0.3 liters between the two, the solenoid valve is opened to switch to a large flow rate of, for example, about 40 liters / minute, and the liquid of fuel oil or the fuel oil is detected by the liquid detecting means provided near the tip of the discharge pipe. Refueling is continued at a large flow rate until bubbles are detected. At time t4, when the liquid detecting means detects the liquid or bubble of the fuel oil, the pump is stopped and the electromagnetic valve is closed to temporarily stop the oil supply, and from a time t5 when a predetermined time, for example, W1 = 5 seconds has passed. Again with a small flow rate.
Refuel 3 liters and switch to a large flow rate at time t6. After that, when the liquid detecting means again detects the liquid or bubble of the fuel oil at time t7, the fuel supply is stopped until time t8, and then the flow rate is switched to a large flow rate at time t9, and the fuel supply is stopped at time t10 and stopped at time t11. Switch to a smaller flow rate again. This time t1
If the liquid detecting means detects the liquid or bubble of the fuel oil before the time W2 has elapsed from 1, it is judged that the fuel oil is filled, and the pump is stopped at time t12 and the refueling operation ends.

In such a prior art, a refueling pattern is repeated in which the refueling operation is temporarily stopped every time the liquid or foam of the fuel oil is detected by the liquid detecting means to switch to a small flow rate and then to a large flow rate. Therefore, although the refueling time is relatively short, when the flow rate is large, the oil level rising speed in the fuel tank refueling pipe is fast, and when it is close to the filling level, it is detected at times t4, t7, and t10. There is a problem that the bubbles that have risen vigorously in the refueling pipe overflow from the refueling port, stain the vehicle body, and the overflowed fuel oil is wasted.

In another prior art which solves the above-mentioned problems of the prior art, as shown in FIG. 5, when the liquid or bubble of the fuel oil is detected by the liquid detecting means at time t4, the time W
Refueling is stopped for 1 period, and refueling is performed at a small flow rate from time t5, and thereafter, refueling with only a small flow rate and refueling stop are repeated, and after refueling at a small flow rate at time t16, time W2 is When the liquid detection means detects at time t17 until the elapse, the refueling is ended.

[0006] In such another prior art, since the liquid is supplied at a small flow rate every time the liquid detecting means detects the liquid or the bubble of the fuel oil, there is no possibility that the bubble of the fuel oil overflows from the oil supply port. However, there is a problem that the refueling time becomes long when the liquid detecting means is activated immediately after the refueling starts due to the splashing of the oil or the like.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a self-filling refueling system capable of shortening the refueling time without causing liquid or bubbles of fuel oil to overflow from the refueling port near the filling. It is to provide a device.

[0008]

According to the present invention, an output from a liquid detecting means for pumping fuel oil pumped up by a pump to a refueling nozzle and detecting liquid or bubbles of the fuel oil near the tip of the refueling nozzle. In response to the, in the automatic filling refueling device that temporarily limits the discharge amount of the fuel oil discharged from the refueling nozzle and then switches to a small flow rate to continue refueling, a constant refueling amount from the start of the first refueling or When the liquid detection means detects a liquid or bubble of fuel oil within the refueling time and the discharge amount is limited, the refueling after the detection is returned to a large flow rate. .

[0009]

According to the present invention, when the liquid detecting means detects the liquid or bubble of the fuel oil within a fixed amount of fuel or a refueling time from the start of the first refueling and the discharge amount is limited, refueling immediately after that. Is carried out at a high flow rate. As a result, even when the splash of the fuel oil discharged from the refueling nozzle is detected in the early stage when the liquid detection means starts the liquid detection such as the first detection, the refueling is performed only by the small flow rate. The flow rate is switched to a large flow rate, and quick refueling is possible.On the other hand, when the liquid detection means is activated when the fuel level is close to filling, the fuel flow rate is changed to low flow rate refueling. You can prevent it from overflowing your mouth.

[0010]

FIG. 1 is a system diagram showing the overall construction of an embodiment of the present invention. Fuel oils such as regular gasoline, high-octane gasoline, and light oil are individually stored in a storage tank buried underground in a gas filling station, and the fuel oil in each storage tank is pumped from a pipe 4 by a pump 3. The fuel oil pumped up by the pump 3 is an automatic flow control valve V using a pipe 5, a flow meter 6, a pipe 7, a solenoid valve and the like.
1, the pipe line 8, and the refueling hose 9, and then the refueling nozzle 1
Pumped to zero.

The refueling nozzle 10 is a refueling nozzle main body 1.
1 and a discharge pipe 13 extending from the main body 11,
1 has a built-in manual flow control valve V2 that opens and closes by operating the operating lever 14. A liquid level sensor S1 as a liquid detecting means or a related mechanism is provided near the tip portion 15 of the discharge pipe 13. This liquid level sensor S1
Is, for example, a photocoupler, an ultrasonic detector, a negative pressure detector for detecting the displacement of the diaphragm due to a negative pressure increase as disclosed in Japanese Patent Laid-Open No. 1-279096 proposed by the present applicant, or a negative pressure increase directly. It is possible to appropriately select and use a semiconductor type pressure detector or the like for detecting.

The pipelines 7 and 8 connected to both sides of the flow control valve V1 are connected by a bypass pipeline 16. The bypass line 16 allows passage of fuel oil pumped by the pump 3 at a flow rate of about 10 to 12 liters / minute with the flow rate control valve V1 closed.
A small amount of fuel is supplied. Further, when the flow rate limiting valve V1 is opened, the respective pipelines 7 and 8 communicate with each other, and oil is fed at about 40 liters / minute, so that a large amount of oil is fed. By controlling the opening / closing of the flow rate control valve V1 in this manner, it is possible to selectively switch between a small flow rate and a large flow rate for oil supply.

The amount of fuel oil supplied to the fueling nozzle 10 in this manner is electrically detected by the flow rate pulse transmitter 17 provided in association with the flow meter 6. The flow rate pulse transmitter 17 outputs a flow rate pulse signal s1 of 1 pulse for every 0.01 liter, and the flow rate pulse signal s1 is counted by the counting circuit 18. The count value s2 counted by the counting circuit 18 is displayed by a display device 19 provided in the main body of the fuel supply device (not shown). The display 19 is realized by, for example, a plurality of plasma display tubes.

The body of the refueling device also includes a refueling nozzle 1.
A nozzle case 20 to which 0 is detachably hooked is provided, and a nozzle detection switch S2 for detecting whether or not the oil supply nozzle 10 is hooked is provided to the nozzle case 20. The nozzle detection switch S2 outputs a nozzle detection signal s3 of a low level when the refueling nozzle 10 is locked to the nozzle case 20 and a high level when the refueling nozzle 10 is disengaged. When the nozzle detection signal s3 switches from the low level to the high level, the motor control circuit 21 outputs the motor control signal s4 to rotate the motor 23, and the rotation of the motor 23 drives the pump 3 described above. The flow rate control valve V1 is controlled to open / close by a valve control signal s5 from the valve control circuit 24. The main body 11 of the fueling nozzle 10 is provided with a display lamp 25 realized by, for example, an LED, and the display lamp 2
5 is turned on, blinked, and turned off by the display signal s6 from the filling determination circuit 26.

The refueling device of the present invention also includes a release switch SW1 for releasing the stopped state due to automatic filling and refueling.
A refueling mode changeover switch SW2 and a setting means 27 for setting a constant refueling amount or a refueling time from the start of the first refueling are provided as described later. The release switch SW1 is pressed by the refueling operator when it is determined that additional refueling is possible when the automatic refill function is stopped and the release signal s7 is sent to the fullness determination circuit 26. It is output and the stopped state is released. Further, the refueling mode changeover switch SW2 is a motorcycle mode in which the automatic filling refueling function is canceled, a normal refueling mode in which refueling is performed by the automatic filling refueling function, and continues refueling at a small flow rate, and the liquid level sensor S1 detects the liquid level. The mode switching signal s8 corresponding to each mode includes a difficult refueling mode in which refueling is stopped and restarted after a fixed amount of refueling or at regular time intervals.
To the filling determination circuit 26.

In the motorcycle mode, since the capacity of the fuel tank generally provided in a two-wheeled motor vehicle and a motorized bicycle is relatively smaller than that in a four-wheeled motor vehicle and the like, the operator is more likely to refuel than the automatic refueling function. Is provided so that it is more reliable to directly refuel and the refueling time can be shorter than that of frequent refueling / stopping operation. The normal refueling mode is provided to prevent a worker from being restrained by refueling work when refueling a four-wheeled ordinary vehicle or a large vehicle. In addition, the difficult refueling mode is used for cases where it is difficult to refuel even if the flow rate is small even if the flow rate is small or the inflow is poor depending on the shape of the refueling pipe extending from the fuel tank of the vehicle to the refueling port. It is provided. In each of these modes, the refueling operator looks at the vehicle that has been refueled and makes a judgment, and a switching operation is performed to the corresponding mode.

Further, the setting means 27 is composed of a plurality of numeral keys and a setting circuit, and outputs a set value signal s9 corresponding to the amount of refueling or the refueling time, which is key-input, to the filling determination circuit 26.

FIG. 2 is a flow chart for explaining the operation of the automatic filling oil supply apparatus 1, and FIG. 3 is a timing chart corresponding to the oil filling operation of the automatic filling oil supply apparatus 1. In step n1, the refueling nozzle 10 becomes the nozzle case 20.
The nozzle detection switch S2.
The nozzle detection signal s3 changes from the low level to the high level, whereby the counting circuit 18 is reset in step n2 and in response to the count value signal s2, the display 19 resets the previous refueling display to zero. Further, the motor control circuit 21 outputs the motor control signal s4 to start the rotation of the motor 23 and drive the pump 3. At this time, the valve control circuit 24 closes the flow control valve V1 by the valve control signal s5, the operator sets the refueling mode changeover switch SW2 to the normal refueling mode, and the setting means 27 sets the set value to, for example, 5 liters. Set.

By such an operation, the filling determination circuit 2
6 inputs a mode changeover signal s8 corresponding to the normal refueling mode from the refueling mode changeover switch SW2 and a set value signal s9 corresponding to the set value 5 liters from the setting means 27, and these signals s8 , S9 is input, the display signal s6 is output and the display lamp 25 is turned on to notify that the refueling operation has started in the normal refueling mode.

In such a state, the process proceeds to step n3, where the operator pulls the operation lever 14 (time t2) with the discharge pipe 13 of the fueling nozzle 10 inserted in the fueling port of the vehicle and is pumped up by the pump 3. Fuel oil is bypass line 16
Is discharged from the discharge pipe 13 into the fuel tank at a small flow rate. The flow rate at this time is measured by the flow meter 6,
The flow rate pulse transmitter 17 outputs a flow rate pulse signal s1 corresponding to this measured value, and the counting circuit 18 counts. When the count value by the counting circuit 18 reaches a preset flow rate, for example, 0.3 liter, the filling determination circuit 26
Outputs the determination signal s10 to the valve control circuit 24 in step n4, which causes the valve control circuit 24 to output the valve control signal s5.
Is output to open the flow rate control valve V1 (time t3).
As a result, the pipes 7 and 8 are communicated with each other, and the fuel oil pumped up by the pump 3 is discharged from the discharge pipe 13 at a large flow rate and switched from the small flow rate to the large flow rate.

At step n5, when the liquid level sensor S1 detects the liquid or bubble of the fuel oil (time t4), the liquid level sensor S
The detection signal s11 from 1 is output and the filling determination circuit 2
6 is input. Then, in step n6, the filling determination circuit 26 outputs the determination signal s10 to cause the valve control circuit 24 to output the valve control signal s5 to close the flow rate control valve V1 and to transmit the determination signal s12 to the motor control circuit 21. Then, the motor control signal s4 is output and the motor 23 is stopped only during the time W1 (time t4). Step n7
In the filling determination circuit 26, the refueling amount a liter set by the setting means 27 from the start of the first refueling, that is, when the first flow rate pulse signal s1 is input from the flow rate pulse transmitter 17 (time t2), that is, Whether or not 5 liters have been refueled is determined based on the count value signal s2. At this time, if it is within the set value a liter, the process proceeds to step n8, the motor 23 starts rotating and the pump 3 is driven,
The pumped fuel oil is first discharged at a small flow rate through the bypass pipe 16.

At step n9, it is judged whether or not the time after the motor 23 is re-driven reaches W2 (= 0.3 liter). If the time W2 has been reached, the flow rate control valve V1 is opened in step n10 to shift to a high flow rate, and the operations of steps n5 to n8 are repeated. If the time is less than W1 (= 0.3 liter), the process proceeds to step n11, and it is determined whether or not the liquid level sensor S1 detects the liquid or bubble of the fuel oil in the filling determination circuit 26. If the liquid or bubble of the fuel oil is not detected, the process returns to step n9, and if detected, the motor 23 is stopped and the display lamp 2 is operated at step n12.
5 is displayed in a blinking manner to notify that it is full, and the refueling operation is completed in step n13.

In step n7, the liquid level sensor S
If the amount of refueling when the fuel oil liquid or bubble is detected by 1 exceeds the set value a (time t5), the process proceeds to step n14, the rotation operation of the motor 23 is started (time t6), and the pump 3 is driven. The fuel supply is continued while the flow rate is small, but when the liquid level sensor S1 detects the liquid or the bubble of the fuel oil in step n15 (time t8), the motor 23 is restarted in step n14 in step n16. From time to time, it is determined whether or not it is less than the time W2 (= 0.3 liter). If it is less than W2, the process proceeds to step n17, where the motor 2
3 is stopped and the display lamp 25 is displayed blinking, and if there is no additional refueling in step n18, that is, if the release switch SW1 is not pressed, the process proceeds to step n13 and the refueling operation ends. If the time W2 has been reached in step n16, W in step n21
After stopping the motor 23 for 1 = 2 seconds, the process returns to step n14 to re-drive the motor 23 (time t9), and time W2
If it is detected within the time (time t10), the refueling ends.

When it is determined in step n18 that additional lubrication is to be performed, the process proceeds to step n19 and the release switch S
W1 is pressed. As a result, the driving of the motor 23 is started, the display lamp 25 is turned on, and the process returns to step n14.

The set value a can be set, for example, in the range of 1 to 10 liters for each liter, but it is not always necessary to set it again for each refueling, and once it is set, The setting may be valid until changed. When the mode selector switch SW2 is not set, refueling is performed in the normal refueling mode.
Other modes may be effective only once when set, and then automatically return to the normal mode.

Although the indicator lamp 25 is provided on the main body 11 of the refueling nozzle 10 in the above embodiment,
As another embodiment of the present invention, it may be provided in the main body of the oil supply device.

[0027]

As described above, according to the present invention, until the set value is reached, even if a droplet of fuel oil adheres to the liquid detecting means due to splashing, it is possible to switch to refueling with only a small flow rate. Refueling is continued after returning to the large flow rate, so that refueling time can be shortened. In addition, if the value is equal to or more than the set value, after the liquid is detected, the oil is supplied at a small flow rate.
It is possible to refuel up to the nearest filling point without overflowing.

[Brief description of drawings]

FIG. 1 is a system diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the automatic filling oil supply device 1.

FIG. 3 is a timing chart corresponding to the operation of the automatic filling oil supply device 1.

FIG. 4 is a timing chart for explaining a typical prior art.

FIG. 5 is a timing chart for explaining another prior art.

[Explanation of symbols]

 1 Automatic Filling Refueling Device 3 Pump 6 Flow Meter 10 Refueling Nozzle 11 Refueling Nozzle Main Body 13 Discharge Pipe 14 Control Lever 15 Tip 16 Bypass Pipeline 17 Flow Rate Pulse Transmitter 18 Counting Circuit 19 Indicator 20 Nozzle Case 21 Motor Control Circuit 23 Motor 24 Valve control circuit 25 Display ramp 26 Fill judgment circuit 27 Setting means V1, V2 Flow rate control valve S1 Liquid level sensor S2 Nozzle detection switch SW1 Release switch SW2 Oil supply mode changeover switch s1 Flow rate pulse signal s2 Count value signal s3 Nozzle detection signal s4 motor control signal s5 valve control signal s6 display signal s7 release signal s8 mode switching signal s9 set value signal s10 determination signal s11 detection signal s12 determination signal

Claims (1)

[Claims] 1. A refueling nozzle in response to an output from a liquid detecting means for pumping fuel oil pumped up by a pump to a refueling nozzle and detecting liquid or bubbles of the fuel oil near the tip of the refueling nozzle. In an automatic filling refueling device in which the amount of fuel oil discharged from a fuel tank is once limited, and then refueling is continued by switching to a small flow rate, the liquid detection means within a constant refueling amount or refueling time from the start of the first refueling. When the fuel oil liquid or bubble is detected and the discharge amount is limited, the refueling device after the detection is returned to a large flow rate.