JPH02242793A - Oil feeding equipment - Google Patents

Abstract

PURPOSE:To perform an integral number oil feed continuously without stopping the oil feed operation by a method wherein a control unit, which stops an oil feed at the last stage of oil feed at the zero in case the liquid level is detected when the number of a digit which is made to be zero at the time of completion of the oil supply falls on at least two digits which are close to zero, is provided. CONSTITUTION:The title equipment has a control unit 14, which stops an oil feeding at the last stage of the oil feeding at the zero point in case the liquid level is detected when the number of a digit which is made to be zero at the time of completion of the oil feed falls on at least two digits which are close to zero. In this case, when the liquid level is detected when a number at the second place of decimals falls on at least two digits which are close to (0), e.g., (7) to (9), the oil supply is stopped at the following (0). Therefore, even when the liquid level is detected during (0) to (6), unless the level sensor is not detecting the liquid level on at least two numbers among (7) to (9), the oil feeding is continued starting from (0), (1)... again. By this method, even when the liquid level descends, e.g., by releasing of air in the air reservoir during an oil feeding work, the oil feeding is continued to a complete (full tank) condition wherein the liquid level is detected by the level sensor, and also, an integral number oil feed can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a refueling device that stops refueling when a liquid level sensor generates an output and restarts refueling after a certain period of time.

[Conventional technology] When refueling a car's fuel tank, it is often the case that the tank is filled to the ``full'' level. When the liquid level sensor detects the liquid level as the water rises, the tank is “full”.
The system determines that this is the case and stops refueling. However, the liquid level sensor detects bubbles and splashes that occur during refueling work, and as a result, refueling stops, so if a certain period of time, for example 3 seconds has elapsed, after the liquid level sensor outputs a signal. Later, when the output signal from the liquid level sensor disappears, refueling starts again, and the lowest digit rO of the displayed refueling amount
The technique of refueling until the number at the end of O1j becomes zero (hereinafter, the operation of refueling until the number at the end of the refueling amount becomes zero is simply referred to as integer refueling) was developed by the present applicant in Japanese Patent Application Laid-Open No. 58-41095. It is proposed in the Publication No.

On the other hand, there is an air pocket at the top of a car's fuel tank, so even if the tank is full, if the car shakes due to, for example, blowing out the windows of the car, the air in the air tank will escape and an additional amount will be released. may become available for refueling. At that time, in the above-mentioned integer refueling, refueling is stopped when the end of the refueling amount reaches a predetermined number, so the tank is not completely "full."

[Question 111 to be solved] Therefore, an object of the present invention is to provide a refueling system that allows continuous integer refueling without stopping refueling when it becomes possible to refuel a small amount during integer refueling. We are in the process of providing equipment.

[Means for Solving the Problems] According to the present invention, in a refueling device that stops refueling when a liquid level sensor generates an output and restarts refueling after the output stops, it is possible to set the refueling amount to zero at the end of refueling. The number of digits to be
If liquid is detected at at least two of the numbers close to zero, the control means stops the refueling at zero.

[Description of the effects of the invention] Therefore, if the amount of oil supplied at the start of integer oil supply is, for example, '13.
56j J, in this integer refueling, refueling is performed until the number in the two decimal places becomes "0", but conventionally, the number in the two decimal places to be zeroed out is "0", that is, r
Refueling was stopped at 13.60j. However, in the present invention, if the liquid is detected when the number in the second decimal place is close to "0", for example, "7", "8", or "9", the primary "0" of
to stop refueling. Therefore, even if liquid is detected from "0" to "6", if the liquid level sensor does not detect liquid at at least two of "7" to "9", it will return to "0" and "1".
"...and refueling continues. Therefore, even if, for example, the air in the air pocket is released during refueling and the liquid level drops, it is possible to refuel to a completely "full" state where the liquid level sensor detects the liquid, and it is possible to perform integer refueling. can.

Note that the liquid level may be detected by all three of "7" to "9", or the liquid level may be detected by two.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a refueling device embodying the present invention.
has a built-in pump 3 driven by a motor 2, and the pump 3 sucks up oil stored in a tank (not shown) from a suction pipe 4 and sends it to a discharge pipe 5. A flow meter 6 and a flow control valve 7 are connected in series to the discharge pipe 5, and a refueling nozzle 9 is further connected to the discharge pipe 5 via a hose 8. Pulse transmitter 1 installed in flowmeter 6
The flow signal from 2 is sent to the controller 14 via line L1. The signal from the pulse transmitter 12 is sent from the control device 14 via the line L2 to the display meter 15, which digitally displays the amount of oil supplied.

A liquid level sensor 10 is provided near the tip of the refueling nozzle 9, and this liquid level sensor 10 is, for example, a photoelectric type,
The signal line passes through the fuel supply hose 8 and is connected to a line L at a connecting portion 16 between the discharge pipe 5 and the fuel supply hose 8, and is then connected to the control device 14.

In the figure, reference numeral 11 denotes a nozzle switch, which sends a signal to the control device f14 via line 4 when the refueling nozzle 9 is removed from the nozzle hook. In addition, numeral 13 in the figure is a valve driving device for the flow rate control valve 7, and the control device 1
A signal from No. 4 is sent via line L5 to control the valve opening. Further, reference numeral 17 is an alarm, and as will be described later, when refueling is completed, the line L from the control device 14 is
A signal is output via 6 to report that tube. Note that a signal from the control device 14 is transmitted to the motor 2 via a line L7 to control the motor 2.

The control device 14 includes first and second counters c, which will be described later.
, C2.

Next, FIG. 2 shows an example of a fuel tank of an automobile to be refueled. Usually, an air reservoir chamber 21 is provided in the upper part of the fuel tank 20, and a refueling pipe 22 extends from the upper surface of the fuel tank 20. The tip thereof serves as a refueling port 23 into which the refueling nozzle 9 is inserted.

Therefore, during refueling work, the liquid level inside the fuel tank 20 rises, the inside of the refueling pipe 22 is also filled with oil, and the refueling port 2
Even if the refueling nozzle 9 inserted through the refueling nozzle 3 detects the liquid level, the air in the air storage chamber 21 may be released due to shaking of the car due to window cleaning, etc., and the liquid level may drop. In particular, when the liquid level drops during integer refueling, which is the final refueling, in the conventional technology, the amount of air released could not be refilled.According to the present invention, even in such a case, complete
It is possible to refuel until the tank is full.

Figure 3 is a diagram showing a so-called lubrication pattern, for example as described in Japanese Patent Laid-Open No. 58-41095. In the example of Figure 0, which shows the flow rate, the current time is 11.
When the refueling operation is started, the flow rate control valve 7 is initially fully opened and refueling is performed at a rate of 45j/min. When the liquid level sensor 10 detects oil bubbles or droplets as the liquid level rises, the flow rate control valve 7 closes (+2), and then closes the flow rate control valve 7 again after a certain period of time, for example 3 seconds, when the bubbles or droplets disappear. is opened (ti) and refueling is resumed, but this time, the opening degree of the flow rate control valve is limited and refueling is performed at a rate of 30j/min. The liquid level sensor 10 detects the liquid level again.)
After a certain period of time, the tank is refueled at 20 J/min (ts), and the liquid level is detected again and the refueling stops (+6
).

Finally, the flow rate control valve 7 is slightly opened for integer refueling, and refueling is performed at 5 J/rn'in (17), and the refueling operation ends when the second decimal place becomes zero (ta).

In the present invention, the control shown in FIG. 4 is performed during this integer oil supply time t7 to +8. The following two decimal places are “0”
4, the control device 14 sequentially controls the flow rate per unit time to 45 J/min, -"30 J/min, as described above.
min, decreases to 20j/min, and finally 5j/min
It is determined whether or not the integer number of refuelings has been reached (step S1). If the integer number of refuelings has been reached, first the first counter C1 is reset to zero (step S2). Since it is dangerous if the nozzle 9 comes off from the refueling port 23, the second counter C2 is reset to zero (step si), which is to prevent refueling of more than a certain amount, for example, 2000 cc. When the second digit of the decimal point, that is, the digit of 10cc, becomes "0", the second counter C2 selects multiple numbers "7" that are close to it.
, "8" and "9" when the liquid level sensor 1 is refueled sequentially.
It checks whether there is a liquid detection signal starting from 0 and adds "1" if there is, and when the signal becomes "2", the refueling is stopped at the next "0". Detecting the presence or absence of liquid two out of three times in this way is, for example, when the liquid level sensor is an optical sensor, detecting liquid splashes or drops as liquid and preventing erroneous refueling from being completed. By detecting the liquid using multiple numbers, malfunctions can be prevented and the tank can be completely filled.

After returning both counters C1 and C2 to zero in this way, when the 10cc digit on the oil supply amount display becomes "7" (step S
4) When it becomes "7", it is determined whether there is a signal from the liquid level sensor, that is, whether there is liquid or not (step Si, if there is liquid in this step S, the counter C2
is set to "+1" (step S6), and step S
If NO in s, that is, if there is no liquid, step S7
Proceed to 0 Next, when the 10cc digit becomes "8" (step S?), if the liquid level sensor detects liquid (step S8), counter C2 is set to "r+1" (step S
9), if No in step S1, proceed to the next step SIo
Proceed to 0 When the next 10cc digit becomes "9" (step 5ho), if the liquid level detection sensor detects liquid (step S1), counter C2 is incremented by "+1" (step 5L2). ) - If there is no liquid at step S, proceed to the next step Slj. First, determine whether the count number of the second counter C2 is "1" or more. Step 513
) "1" or less than "1" (YES), the count amount of the first counter C1 is a certain amount Qcc (for example, 200
Step S +4
), Q CC or less, set the first counter C3 to r
+100J or "0.11" is added to step S+
s), return to step Ss. And Stella 7 S+
If the count number of the second counter C2 is 2 or more in step S14, and if the count number of the first counter CI is more than Qcc in step S14, when the digit of 10cc becomes "0" (step 5ki), the flow rate control valve 7 is closed, and the alarm 17 is activated in step 517) to notify the end of refueling.

[Summary] As described above, according to the present invention, during integer refueling, which is the final refueling, refueling is performed at zero only if oil is detected at two numbers out of multiple numbers close to zero. Even if the liquid level in the fuel tank drops due to the release of air from the air reservoir, refueling will stop when the liquid level sensor detects oil and reaches an integer value. You can always have a completely "full tank" of fuel.

[Brief explanation of drawings]

Fig. 1 is a front view showing a refueling device embodying the present invention;
The figure is a side view showing an example of a fuel tank of a car to be refueled, FIG. 3 is a view showing an example of a refueling pattern implemented in the present invention, and FIG. 4 is a view showing an aspect of control of the present invention. be. 1... Oil supply device 2... Motor 3... Pump 6... Flow meter 7... Flow rate control valve 9.
...Refueling nozzle 10...Liquid level sensor 11...
・Nozzle switch 12...Pulse transmitter 13
... Valve drive device 14 ... Control device 15 ... Display meter 17 ... Alarm C1 ... First counter
second counter

Claims (1)

[Claims] In a refueling device that stops refueling when the liquid level sensor generates an output and restarts refueling after the output stops, the number of digits to be set to zero at the end of refueling is at least two of the numbers close to zero. 1. A refueling device comprising a control means for stopping refueling at zero level when liquid is detected at a time of zero.