JPH0285199A - Oil feeder - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling device, and particularly to a refueling device that improves refueling efficiency and is suitable for use when refueling a small amount.

[Prior art 1] Conventionally, there is a refueling device equipped with a refueling nozzle that has an automatic refueling function, but this type of refueling nozzle has an internal structure that prevents the inside of the fuel tank from discharging oil from the refueling nozzle to the fuel tank. The fuel tank includes a bubble detection sensor that detects bubbles generated in the fuel tank, and a liquid detection sensor that detects the liquid level in the fuel tank.

During automatic refueling, the foam rises earlier than the liquid level as the refueling process progresses, so when the foam detection sensor detects this foam for the first time, refueling is automatically interrupted and the foam is put on standby. After the bubbles disappear, lubricating is restarted. Foam is generated again when refueling is resumed, and as the foam rises again as the liquid level rises, when the foam detection sensor detects the foam again, refueling is interrupted again, and refueling is resumed after the foam is extinguished. Then, as the above-mentioned refueling interruption operation is repeated several times, the liquid level rises, so refueling is stopped based on the liquid level detection by the liquid detection sensor, and full refueling is automatically terminated. It has become.

[Problems to be Solved by the Invention] By the way, the conventional oil supply device described above has the following problems.

■For example, during high-speed refueling, the amount and speed of oil discharged from the refueling nozzle into the fuel tank are large.
The oil droplets bounce off the liquid surface in the fuel tank, and as a result, if the liquid detection sensor detects the rebounding oil droplets before the bubble detection sensor detects the bubbles, the fuel tank becomes full. Even if the tank does not reach the tank, it is determined that the tank is full, resulting in a problem where refueling is stopped.

(2) Therefore, the refueling man has to restart the once-stopped refueling every time the problem (2) above occurs, resulting in a problem that the efficiency of the refueling operation is extremely reduced.

(2) Even in a refueling nozzle having an automatic refueling function that is equipped with only a liquid detection sensor, the above-mentioned problems ((2) and (2)) occur, so there is a similar problem in that the refueling work efficiency is reduced.

■For the reasons mentioned above, it is not possible to automatically refuel with the tip of the discharge pipe of the refueling nozzle immersed in the liquid level of the fuel tank, and as a result, for example, motorcycles with shallow fuel tanks When automatically refueling a car or motorized bicycle, the refueling person must be careful not to let the tip of the discharge pipe come into contact with the liquid surface, which makes the refueling process extremely troublesome. Become.

The present invention solves the above-mentioned problem, and is a refueling device that accurately performs automatic full refueling by prohibiting the operation of the liquid detection sensor before detecting bubbles inside the fuel tank, thereby achieving improved refueling efficiency. The purpose is to provide.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a refueling nozzle, a pump motor that drives and controls a refueling pump that supplies oil to the refueling nozzle, and a fuel pump provided in the refueling nozzle. A foam detection means for detecting bubbles generated from inside the tank, and a liquid detection means provided in the fuel supply nozzle for detecting the liquid level in the fuel tank, and when the oil liquid is discharged from the fuel supply nozzle into the fuel tank. Each time the bubble detection means detects bubbles that are generated,
In a refueling device configured to temporarily suspend refueling and complete refueling when the liquid detection means detects the liquid level in the fuel tank, the refueling device is provided in the refueling device main body or the refueling nozzle. a notification means, and if the liquid detection means detects a liquid level in the fuel tank before the bubble detection means detects bubbles in the fuel tank when refueling is full, the pump motor that is being driven continues to be driven; The fuel tank is characterized by comprising a control means for continuing full tank refueling and activating the notification means to notify that full tank refueling has not been completed.

[Function] According to the present invention, when the liquid detection means detects the liquid level in the fuel tank before the bubble detection means detects bubbles in the fuel tank during a full tank refueling operation, the control means controls the pump The motor is continuously driven without stopping to continue full tank refueling, and a notification means notifies a refueling man that full tank refueling has not yet been completed. This eliminates the conventional problem of stopping the refueling every time the liquid level is detected before the bubble is detected, so it is possible to improve the refueling work efficiency.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic diagram showing the refueling system of this embodiment. A refueling tank 1 is buried underground at a refueling station, and a refueling pump 2 disposed inside the refueling system is driven by a pump motor 3. , the oil liquid is pumped up from the oil storage tank l. The oil pumped up by the oil supply pump 2 is transferred through a pipe line 4, and a flow meter 5 for measuring the flow rate is disposed in the middle of the pipe line 4. A flow rate pulse transmitter 6 is attached to the flow meter 5, and the flow pulse transmitter 6 is configured to supply a flow rate pulse P corresponding to the flow rate of the oil liquid transferred through the pipe line 4 to a controller to be described later. It has become.

A refueling hose 7 is disposed on the outer wall of the refueling device, and the refueling hose 7 forms an oil flow path together with the pipe line 4, and transports the oil pumped up by the refueling pump 2. It is supposed to be done. A refueling nozzle 8 with an automatic refueling function is installed at the tip of the refueling hose 7, and can be attached to and removed from a nozzle hook 9 provided on the outer wall of the refueling device. has been done.

A nozzle switch IO is installed inside the oil supply device on the back side of the nozzle hook 7, and when the fuel nozzle 8 is removed from the nozzle hook 9, a "1° signal (removal signal) is sent.
When the refueling nozzle 8 is hooked back to the nozzle hook 9, a "0" signal (return signal) is supplied to a controller 11 disposed inside the refueling device.The controller 11 transmits the flow rate pulse. Based on the flow rate pulse P supplied from the fuel supply device 6, the amount of fuel to be supplied to a vehicle/two-wheeled motor vehicle, etc. is displayed and controlled on a display device 12.Also, an alarm device 13 is disposed in the fuel supply device. It is designed to sound when the refueling man returns the refueling nozzle 8 to the nozzle hook 9 after the refueling operation is completed.

As described in detail in FIG. 3, the controller 11 controls the drive of the pump motor 3 and the sounding of the alarm 13 based on signals from various sensors installed in the fuel nozzle 8, which will be described later. ing.

As shown in FIG. 2, inside the oil supply nozzle 8 is a main valve 1.
A valve body 16 consisting of a valve 4 and an auxiliary valve 15 is disposed, and the valve body 16 is urged by a spring 17 so as to be seated on a valve seat 18. As the refueling man pulls up the operating lever 19, the valve body 16 is displaced upward in the figure against the biasing force of the spring 17, opening the flow path toward the tip of the refueling nozzle 8. ing. The operating lever 19 is hung on a hook (as shown) so that the valve body 16 can be held in an open state.

A chamber 20 is arranged inside the refueling nozzle 8, and the chamber 2
0 is defined by a diaphragm 21 into an operating pressure chamber A and a constant pressure chamber B, and a shutter rod 22 is provided protruding from the surface of the diaphragm 21 on the constant pressure chamber B side. A bubble detection sensor 23 composed of, for example, a photointerrupter is disposed on the inner wall of the chamber 20 at a location facing the shutter rod 22, and when its optical path is interrupted, the bubble detection sensor 2
3 is turned OFF and outputs a "0" signal (bubble non-detection signal).The shutter rod 22 blocks the optical path when the diaphragm 21 is not displaced.
When the diaphragm 21 is displaced, it moves along with the displacement and is separated from the optical path.

A negative pressure passage 25 is disposed inside the discharge pipe 24 of the refueling nozzle 8, one end 25 of the negative pressure passage 25 is open to the outside, and the other end 25b communicates with the working pressure chamber A. ing. Further, a known negative pressure generating means (as shown) communicates with the negative pressure passage 25, and when the oil is discharged from the discharge pipe 24, the air pressure inside the negative pressure passage 25 is caused by the venturi effect of the negative pressure generating means. is about to go down.

In this case, one end 25 of the negative pressure passage 25 even when the oil is being discharged! If the open state is maintained, air will flow in from the one end 25a, so the atmospheric pressure inside the negative pressure passage 25 will not drop. Therefore, in this state, the diaphragm 21 is not displaced and the shutter rod 22 The optical path is cut off, the bubble detection sensor 23 is turned off, and outputs a "'0" signal (foam non-detection signal). On the other hand, when the bubbles block one end 25a of the negative pressure passage 25, the inflow of atmospheric air from the one end 25a is blocked, and the atmospheric pressure in the negative pressure passage 25 decreases, causing the atmospheric pressure in the working pressure chamber A to become equal to the room pressure in the constant pressure chamber B. As the pressure decreases further, the diaphragm 21 is displaced to the working pressure chamber A side, and accordingly the Nyatta rod 22 moves and the bubble detection sensor 23 turns ON.
′′ signal (bubble detection signal) is output.

A liquid detection sensor 26 composed of, for example, an ultrasonic transmitter and an ultrasonic receiver is attached to the tip of the discharge pipe 24, and the oil in the fuel tank is detected between the transmitter and the receiver. If the ultrasonic wave reception voltage of the receiver changes, the liquid detection sensor 26 turns on and 1
"It is designed to output a signal (liquid detection signal).

On the other hand, if oil does not enter between the transmitter and the receiver, the ultrasonic reception voltage of the receiver does not change, so it turns OFF and outputs the "0" signal (liquid egg detection signal). There is.

Further, an insertion detection sensor 27 composed of, for example, seven sensors is installed near the distal end of the discharge pipe 24 where the liquid detection sensor 26 is disposed, and the insertion detection sensor 27 does not detect light. /Based on light detection,
Insertion/non-insertion of the discharge vibrator 24 into the fuel tank is detected. That is, when the insertion detection sensor 27 detects the insertion of the discharge pipe 24, the insertion detection sensor 27 outputs the "1" signal (
If insertion of the ejection vibrator 24 is not detected, a "0" signal input detection signal) is output.

Next, the control system of this embodiment, which is composed of the controller 11, pump motor 3, nozzle switch 10, alarm 13, bubble detection sensor 23, liquid detection sensor 26, and insertion detection sensor 27, will be explained with reference to FIG. , the output terminal of the nozzle switch 1o is supplied to a first input terminal of an AND gate 30 and an input terminal of an inverter 31. The output terminal of the insertion detection sensor 27 is supplied to the second input terminal of the AND gate 3o. The output end of the bubble detection sensor 23 is connected to the input end of a mono multivibrator (hereinafter abbreviated as MM) 32, the set input end S of an R57 lip 70 tube (hereinafter abbreviated as R3FF) 33, and the first input end of an AND gate 34. and will be supplied to. The output terminal of the liquid detection sensor 26 is supplied to a second input terminal of an AND gate 34, an input terminal of a full tank determination circuit 35, and a second input terminal of an AND gate 38.

The output terminal of the inverter 31 is supplied to the reset input terminal R of the R5FF 33 and the input terminal of the full tank determination circuit 35. The output terminal of the MM 32 is supplied to the input terminal of an inverter 36, and the output terminal of the inverter 36 is supplied to an AND gate 30.
is supplied to the third input terminal of. An output terminal Q of the R5FF 33 is supplied to an input terminal of an inverter 37, and an output terminal of the inverter 37 is supplied to a first input terminal of an AND gate 38. The output terminal of the AND gate 34 is connected to an inverter 39.
The output terminal of the inverter 39 is supplied to the fourth input terminal of the AND gate 30. The output terminal of the full tank determination circuit 35 is supplied to the fifth input terminal of the AND gate 30.

Here, the MM32. R5FF33. The operation of the full tank determination circuit 35 will be explained.

When the bubble detection sensor 23 detects bubbles in the fuel tank and the MM 32 is supplied with the "l" signal, the MM 32 outputs the "l" signal for one second, for example.
When the "0° signal" is supplied due to non-detection of bubbles inside the fuel tank, the "0°" signal is output.

The R5FF33 receives a "1" signal from the nozzle switch 10 when the bubble detection sensor 23 detects bubbles inside the fuel tank, and a "1" signal is supplied to the set input terminal S. is output, and along with this, the reset input terminal R is output from the inverter 31.
When the ゛°O'' signal is supplied to the
“l゛”” signal is output.On the other hand, the R
5FF33 is supplied with a "θ" signal to the set input terminal S when bubbles are not detected in the fuel tank by the bubble detection sensor 23, and also receives a "0" signal from the nozzle switch 10 when the refueling nozzle 8 is hooked back to the nozzle hook 9. is output from the inverter 31 to the reset input terminal R.
′ signal is supplied, “θ”′′ is output from the output terminal Q.
The signal is supposed to be strong.

The full tank determination circuit 35 determines whether the fuel tank is full or not based on a liquid level detection signal from the liquid detection sensor 26. That is, when the liquid detection sensor 26 continues to supply the "l" signal from the liquid detection sensor 26 for more than 0.5 seconds, the full tank determination circuit 35 determines that the fuel level is detected by the liquid detection sensor 26. It is determined that the tank is refueled or the tank is full.
'' signal (pump motor stop signal) is output.Furthermore, the full tank determination circuit 35 is connected to the liquid detection sensor 2.
If the ``1'' signal supplied from 6 is stopped within, for example, 0.5 seconds and the ``0'' signal is supplied, it is reset,
When the refueling nozzle 8 is removed from the nozzle hook 9, a "'1" signal is output from the nozzle switch 10, and when a "0" signal is supplied from the inverter 31 accordingly, the nozzle switch 10 is reset.

The output terminal of the AND gate 30 is supplied to a motor driver 40, and the motor driver 40 drives the pump motor 3 when the "1" signal (drive signal) is supplied from the AND gate 30. From 30”
o" signal (stop signal) is supplied, the pump motor 3 is stopped. The output terminal of the AND gate 38 is supplied to an alarm driver 41, and the alarm driver 41 “I 1” from ANDGATE 38
When a 1 signal is supplied, the alarm 13 is made to sound, while when a ``0'' signal is supplied from the AND gate 38, the alarm 13 is made to stop sounding.

Next, the operation of this embodiment with the above configuration will be explained based on the time chart of FIG. 4.

When a refueling man removes the refueling nozzle 8 from the nozzle hook 9 when starting refueling a vehicle/two-wheeled motor vehicle, etc., the nozzle switch 10 outputs an "l" signal (time t1).

Next, when the refueling man inserts the discharge vibrator 24 of the refueling nozzle 8 into the fuel tank, the insertion detection sensor 27 detects the insertion of the discharge vibrator 24 and outputs a "1" signal (time +
2). At this time, since the bubble detection sensor 23 and liquid detection sensor 26 are outputting a "0" signal, the inverters 36 and 39
．． The full tank determination circuit 35 outputs a "1" signal. Therefore, when the AND gate 30 outputs the "1°" signal (drive signal), the motor driver 40 drives the pump motor 3.
(time + 2). As a result, the oil supply pump 2 starts pumping up oil from the oil storage tank 1, so that oil supply becomes possible.

During refueling, even if the liquid detection sensor 26 detects a rise in the liquid level and outputs the "1" signal before the bubble detection sensor 23 detects bubbles in the fuel tank (time 13), the AND Since the gate 34 outputs a zero signal, the inverter 39 outputs a "l" signal. Therefore, the AND gate 30 outputs a signal "l" to its first to fifth input terminals.
As a result of continuously outputting the "1" signal (drive signal), the pump motor 3 that is being driven does not stop and continues to be driven by the motor driver 40. At this time, the output terminal of R5FF33 A "0" signal is output from Q, and a "l" signal is output from the liquid detection sensor 26. As a result, a "1" signal is output from the AND gate 38, so the alarm driver 41 issues an alarm. The device 13 is made to ring to inform the refueling man that refueling is not yet completed and is in the middle of refueling.

As refueling progresses, the bubble detection sensor 23 detects bubbles in the fuel tank and outputs a "1" signal (time t4). At this time, the MM32 outputs a "1" signal for 1 second, so the inverter 36 outputs a "1" signal. Outputs 0°° signal.

Therefore, the AND gate 30 outputs the ``O'' signal (stop signal), so the motor driver 40 stops the pump motor 3 (time 14).This causes the oil supply pump 2 to stop pumping up oil from the oil storage tank l. In order to stop, refueling is interrupted for 1 second and a state is entered in which the bubbles disappear.

After the refueling is interrupted, when the 1 second period for foam extinguishing standby has elapsed, the MM32 sends a signal of °゛0''0'', so the inverter 3
6 outputs a "1" signal. Therefore, the AND gate 30 outputs a "1" signal (drive signal), and the motor driver 40 drives the pump motor 3 (time +5). As a result, the oil supply pump 2 pumps up the oil from the oil storage tank 1, so that oil supply is restarted.

Furthermore, as refueling progresses, the liquid detection sensor 26 detects the liquid level in the fuel tank and outputs a "1°" signal (time +6).
), at this time, the AND gate 34 outputs the ``''1 signal, so the inverter 39 outputs the ``''O11 signal. Therefore, the ant game 1-30 outputs the "0" signal (stop signal), so the motor driver 40 stops the pump motor 3 (time +6). Stopping pumping of fuel: Refueling is interrupted again and the foam fire extinguishing standby state is established.

When the liquid level in the fuel tank is not detected by the liquid detection sensor 26 and the liquid detection sensor 26 outputs a "0" signal (time +7), at this time, the AND gate 34 becomes "0" 0.
'' signal, the inverter 39 outputs the ``i'' signal. Therefore, the AND gate 30 outputs the ``'l'' signal (drive signal), so the motor driver 40 drives the pump motor 3 (time (7)).

As a result, the oil supply pump 2 pumps up the oil from the oil storage tank 1, so that oil supply is restarted.

Furthermore, as refueling progresses, the liquid detection sensor 26 detects the liquid level in the fuel tank and outputs a "1" signal (at time 18).
), at this time, the AND gate 34 outputs the ``1'' signal, so the inverter 39 outputs the ``O'' signal. Therefore, the AND gate 30 outputs the ``0'' signal (stop signal), so the motor driver 40 stops the pump motor 3 (time tg). As a result, the oil supply pump 2 stops pumping up oil from the oil storage tank 1, and therefore, oil supply is stopped.

When the liquid detection sensor 26 continuously supplies the "1" signal to the full-tank determination circuit 35 for 0.5 seconds or more, the full-tank determination circuit 35 determines that the fuel tank is fully refueled,
Outputs the ``0'' signal (pump motor stop signal). This causes the motor driver 40 to drive the pump motor 3.
Since the O'' signal (stop signal) continues to be supplied, the pump motor 3 continues to be in a stopped state and is not driven again.

When the refueling man finishes refueling, the discharge pipe 2 of the refueling nozzle 8
4 is pulled out from the fuel tank, the insertion detection sensor 27 detects that the discharge pipe 24 is not inserted and outputs the "0" signal, so the bubble detection sensor 23 and the liquid detection sensor 26 each
Outputs a 0pa signal (time 1).

Next, when the refueling man hooks the refueling nozzle 8 back to the nozzle hook 9, the nozzle switch 1O turns OFF and outputs a "0" signal (time 110).

[Modifications] ■In the above embodiment, the liquid detection sensor was composed of an ultrasonic transmitter and an ultrasonic receiver, the bubble detection sensor was composed of 7 Oto-interchangers, and the insertion detection sensor was composed of 7 Oto-interceptors. It is not limited to these configurations.

■In the above embodiment, the full tank determination circuit may be configured to perform a full tank determination based on the number of times the liquid detection sensor has detected the liquid, or if the liquid detection signal from the liquid detection sensor continues. The full tank may be determined based on the output time, or the full tank may be determined based on the refueling interruption interval based on the output of the bubble detection signal from the bubble detection sensor.

(2) In the above embodiment, the alarm 13 is provided in the fuel supply device, but it may also be provided in the fuel nozzle 8.

[Effects of the Invention] As explained above, according to the present invention, there is provided a fuel supply nozzle, a pump motor that drives and controls a fuel pump that supplies oil to the fuel supply nozzle, and a pump motor that is provided in the fuel supply nozzle and the nozzle and that is inside the fuel tank. and a liquid detection means provided in the refueling nozzle to detect the liquid level in the fuel tank. In the refueling device, the refueling device is configured to temporarily suspend refueling each time the bubble detecting means detects the liquid level, and to terminate refueling and perform full refueling when the liquid detecting means detects the liquid level in the fuel tank. If the notification means provided on the refueling device main body or the refueling nozzle and the liquid detection means detects the liquid level in the fuel tank before the bubble detection means detects bubbles in the fuel tank during full refueling,
The present invention is configured to include a control means that continues to drive the pump motor that is currently being driven to continue full tank refueling, and also operates the notification means to notify that full tank refueling is not completed, so that the following effects can be achieved. can be played.

■Before detecting the occurrence of bubbles in the fuel tank, even if oil liquid adheres to the liquid detection means at the tip of the refueling nozzle's discharge pipe, the pump motor will continue to drive and refueling will continue, so it will not work as before. It is possible to prevent the problem in which oil supply is stopped every time liquid is detected before bubbles are detected. This makes it possible to fill up the tank quickly and improve refueling efficiency.

■Since it is possible to refuel a small amount with the tip of the refueling nozzle's discharge pipe inserted into the liquid level of the fuel tank, it is suitable for refueling motorcycles, motorized bicycles, etc. that have shallow fuel tanks.

■As in the case of ■ above, if a large amount of fuel is accidentally refilled into the small-capacity fuel tank of a motorcycle or motorized bicycle, the bubble detection means is activated immediately and stops refueling. . Thereby, it is possible to prevent oil leakage accidents from the fuel tank as in the conventional case, and it is possible to improve safety.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of a refueling device according to an embodiment of the present invention, FIG. 2 is a partial sectional view showing the configuration of a refueling nozzle according to this embodiment, and FIG. 3 is a configuration of a control system according to this embodiment. FIG. 4 is a time chart for explaining the operation of this embodiment. 2...Refueling pump, 3...Pump motor, 8...Refueling nozzle, 11...Controller (control means), 13... Alarm (notification means), 23... Foam detection sensor (foam detection means)
, 26...Liquid detection sensor (liquid detection means), 35
...Full tank determination circuit (control means).

Claims (1)

[Scope of Claims] A refueling nozzle, a pump motor that drives and controls a refueling pump that supplies oil to the refueling nozzle, and a foam detection means provided in the refueling nozzle that detects foam generated from within the fuel tank. The fuel supply nozzle is provided with a liquid detection means for detecting a liquid level in the fuel tank, and each time the bubble detection means detects bubbles generated when the oil liquid is discharged from the fuel supply nozzle into the fuel tank, refueling is performed. In a refueling device configured to temporarily stop refueling and perform a full refueling operation when the liquid detection means detects the liquid level in the fuel tank, the refueling device is configured to terminate refueling and perform a full refueling operation, wherein the refueling device is provided on the refueling device main body or the refueling nozzle. If the liquid detection means detects the liquid level in the fuel tank before the bubble detection means detects bubbles in the fuel tank when refueling to a full tank, the pump motor that is currently being driven is continued to be driven to fill the fuel tank. A refueling device characterized by comprising a control means for continuing refueling and for activating the notification means to notify that full refueling has not been completed.