JPH0335198B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling device installed at a refueling station such as a gas station.

[Prior art] When refueling a car, etc., there are cases in which a fixed amount, such as ``10'' or ``20'', is determined in advance. There are many cases. In such cases, a liquid level sensor that is attached to the fuel nozzle of the fuel supply device and reacts to the level of the supplied liquid, such as gasoline, has conventionally been used. In other words, when refueling is performed using a refueling device that has such a liquid level sensor, when the amount of refueling approaches ``full'', the liquid level sensor comes into contact with the liquid level of gasoline, etc., and issues a signal, causing the refueling device to close the valve of
Alternatively, the pump is stopped and lubrication is automatically stopped. Although this liquid level sensor is installed with the intention of operating in direct contact with the liquid level, during refueling operations, oil splashes inside the car tank causes droplets to fly.
Also, since bubbles are generated that rise before the liquid level,
A liquid level sensor detects such droplets or bubbles and issues a signal, which may stop refueling before the tank is actually "full."

Therefore, when refueling is stopped before the tank is "full," conventionally it is necessary to manually adjust the lever and visually check that the tank is "full." This required time and effort, and resulted in poor refueling efficiency. Therefore, in such a case, it is desired to automatically restart refueling. However, if the liquid level sensor comes into direct contact with the liquid surface, the original role of the liquid level sensor will not be fulfilled unless refueling is completed.
Oil overflows from the tank and is dangerous.

A refueling device that temporarily stops refueling when a liquid level sensor detects bubbles or droplets during refueling operation, and then resumes refueling operation when the bubbles or droplets disappear is disclosed by the applicant in Japanese Patent Laid-Open No. 143298/1983. Proposed. However, this technique was not sufficient.

Further, for example, US Pat. No. 3,916,961 discloses a technique in which refueling is terminated if the output of the liquid level sensor does not disappear even after a predetermined period of time has elapsed after stopping refueling. However, with this known technology, it is not possible to determine whether refueling is complete until a predetermined time has elapsed, and therefore, the refueling time is wasted by the predetermined time.

[Problems to be Solved] Therefore, an object of the present invention is to provide a refueling device that automatically performs refueling and refueling stop, and can shorten refueling time when refueling is finished when the tank is "full". be.

[Means for Solving the Problem] According to the present invention, refueling is automatically stopped based on the liquid detection output of the liquid level sensor provided in the refueling nozzle, and when the liquid detection output disappears, refueling is automatically restarted. In a refueling device that automatically repeatedly stops refueling and restarts refueling, the refueling time measuring means measures the refueling time from restarting refueling to stopping refueling based on the liquid detection output of a liquid level sensor, and stops and restarts refueling. A signal that compares the refueling time measured by the refueling means and the refueling time measuring means with a predetermined refueling time and instructs to resume refueling if the measured refueling time is equal to or longer than the preset refueling time. and a control device that outputs a signal to restart refueling to the refueling means and ends the refueling if the refueling time is shorter than the refueling time.

[Operations and Effects of the Invention] When refueling is stopped due to droplets or bubbles during refueling work, the refueling time from subsequent refueling until refueling is stopped again due to droplets or bubbles gradually becomes shorter. The reason for this is that the closer the tank is to "full," the more quickly bubbles and droplets will reach the liquid level sensor. Therefore, if the refueling time is within a certain value, it can be determined that the tank is "full". Therefore, if the control means compares and determines the time and ends the refueling operation, the refueling operation can actually be completed when the tank is "full." In addition, when refueling stops, the refueling time is determined and refueling is stopped, so you can immediately know that the tank is full and refueling has ended, without taking any extra time. Refueling work time can be shortened, resulting in improved work efficiency.

[Example] A refueling device in which the present invention is implemented will be described below with reference to FIG.

A refueling machine 1 shown in FIG. 1 has a pump 2, and this pump 2 is connected to a suction pipe 3 connected to an oil storage tank (not shown). Also this pump 2
A flow meter 5 and a flow control valve 6 are provided on the discharge pipe 4 from the pump, and a nozzle valve 8 is connected to a hose 7 connected to the discharge pipe 4. This pump 2 is driven by a motor 9,
This motor 9 is controlled by a control device 10. The flow meter 5 has a pulse transmitter 11
A signal from the pulse transmitter 11 is transmitted to the display meter 12 via the control device 10, so that the amount of refueling is displayed. Further, the flow rate control valve 6 is driven by a valve driving section 13, and this valve driving section 13 is controlled by a control device 10. This valve 6 and valve drive section 13
constitutes a refueling means. Further, a liquid level sensor 14 is attached to the nozzle valve 8, and a nozzle switch 15 is provided at the installation position of the nozzle valve 8 of the refueling machine 1 to detect when the nozzle valve 8 is removed from the refueling machine 1. ing. Outputs from the liquid level sensor 14 and nozzle switch 15 are input to the control device 10.

Next, in FIG. 2 and FIG. 2A, the open refueling time from the start or restart of refueling to the stop is set to, for example, "2 seconds", which is the time that can be considered to be almost "full". When the nozzle 8 is removed from the refueling machine 1, a "removal signal" is output from the nozzle switch 15, and this "removal signal" is input to the motor control circuit 16 to turn on the motor 9 and drive the pump 2. Further, the "removal signal" is input to a valve control circuit 17 that constitutes the control device, and a valve opening signal is output from the valve control circuit 17 to the valve driving section 13, so that the valve 6 is opened. Also, this valve opening signal is simultaneously input to the second timer 21 to start the timing operation. At the same time, the "removal signal" is sent to the counting circuit 18.
The previous refueling amount count is erased and the display on the display meter 12 is cleared.

Then, the nozzle 8 is inserted into the refueling port, the lever is pulled, and the latch is engaged to start refueling. Now, after refueling a predetermined amount, a sensor signal is transmitted from the sensor 14 of the nozzle 8 to the valve control circuit 17, and a valve closing signal is inputted from the valve control circuit 17 to the valve drive unit 13, and this valve closing signal is simultaneously transmitted to the second timer 21. The timing operation is stopped, and the time during this period is also transmitted to the valve control circuit 17. Furthermore, at the same time as the valve closing signal is output, a timing operation start signal is output from the valve control circuit 17 to the first timer 20, and therefore, at the same time as the valve 6 is closed, the timing operation by the first timer 20 starts. After a certain period of time, for example, 3 seconds, when the bubbles disappear, a signal is transmitted from the first timer 20 to the valve control circuit 17. Based on this signal, a valve opening signal is transmitted from the valve control circuit 17 to the valve drive unit 13, and the refueling is started. It will be restarted. At this time, this valve opening signal is transmitted to the second timer 2.
1, and the second timer 21 is reset and starts timing at the same time. This second timer 21 constitutes a refueling time measuring means for measuring refueling time. After refueling is resumed, a valve closing signal from the valve control circuit 17 is further inputted to the valve drive unit 13 and the second timer 21 in response to a sensor signal from the sensor 14, and the refueling operation and the timing operation by the second timer 21 are stopped. , the time during this period is transmitted to the valve control circuit 17. As shown in Figure 2A, this second
The time is measured by the timer 21, that is, the valve 6
If the time from valve opening to valve closing is a predetermined fixed time, for example, 2 seconds or more, the above process from the start of refueling to stop is repeated. Also, the second
If the time measured by the timer 21 is less than 2 seconds, refueling will not be restarted thereafter. That is, the first
Even if the signal from the timer 20 is input to the valve control circuit 17, the valve control circuit 17 does not output a valve opening signal. Then, hang the nozzle 8 on the nozzle hook,
Pump 2 and motor 9 stop, and oil supply ends.

[Summary] As described above, according to the present invention, since the refueling restart time is compared for a predetermined time using the control device, it is possible to reliably detect "full tank" and obtain a refueling device that is not affected by bubbles or splashes. I can do it. Therefore, refueling can be reliably and automatically stopped when the tank is "full," making operation easier for workers and improving refueling efficiency.

Although the above embodiment has been described assuming that the start and stop of refueling are all controlled by the valve 6, it is also possible to control the rotation of the drive motor 9 of the pump 2 instead of the valve 6.

[Brief explanation of drawings]

FIG. 1 is a side view of a refueling device implementing the present invention;
FIG. 2 is a block diagram of a refueling system embodying the present invention, and FIG. 2A is a time chart thereof. 8...Refueling nozzle, 14...Liquid level sensor, 20
...First timer, 21...Second timer.

Claims (1)

[Claims] 1. Refueling is automatically stopped based on the liquid detection output of the liquid level sensor installed in the refueling nozzle, and when the liquid detection output disappears, refueling is automatically restarted, and refueling stops and refueling is automatically repeated. In the refueling device, the refueling time is measured by a refueling time measuring means that measures the refueling time from restarting refueling to stopping refueling based on the liquid detection output of a liquid level sensor, a refueling means that stops and restarts refueling, and a refueling time measuring means. The measured refueling time is compared with a preset preset refueling time, and if the measured refueling time is greater than or equal to the preset refueling time, a signal is output to instruct refueling, and if it is less than the preset refueling time, refueling is resumed. A refueling device comprising: a control device that terminates refueling without outputting a signal to restart refueling to the means.