JPS5841095A - Lubrication method - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling method at a refueling station such as a gas station.

For example, when refueling a car, you may want to refuel with R20RJ, but usually you are asked to "fill up", that is, fill the car's fuel tank with oil. To this end, the refueling nozzle is provided with a liquid level sensor, and the refueling is stopped when the liquid level sensor issues a signal.

By the way, ideally, the liquid level sensor emits a signal when
The liquid level sensor emits a signal when it comes into contact with the actual liquid level in the car's tank, but in reality, depending on the shape of the fuel filler port,
Refueling stops due to the liquid level sensor emitting a signal when it comes into contact with splashes caused by splashing oil discharged from the refueling nozzle, or when the liquid level sensor comes into contact with bubbles that rise before the liquid level and emit a signal. do. In the conventional type, when refueling is stopped due to a signal from a liquid level sensor, it is necessary to manually open the valve in order to restart refueling. When refueling is resumed,
In order to eliminate the inconvenience caused by the droplets and bubbles mentioned above, it is possible to reduce the discharge amount by squeezing the valve, but refueling with the valve squeezed requires skill in valve operation, and if you are inexperienced, you may be able to reduce the discharge amount. The refueling operation is repeated many times until the tank is "full", resulting in poor work efficiency.

Furthermore, with the development of electronic equipment in recent years, it has become possible to display the refueling amount [Q-] to two decimal places.

For this reason, counting fractions is troublesome, and it is desirable to refuel up to a predetermined well-defined value, such as one decimal place or 0.5 g (hereinafter, the operation of refueling up to a predetermined value in this way is simply referred to as integer refueling.

Therefore, this integer does not have a mathematical meaning, but means that the end of the refueling amount is a predetermined number). In this way, especially when performing integer lubrication, if the amount of lubrication per unit time is large, a relatively large mechanical inertia force will be applied regardless of whether lubrication is stopped with a valve or a pump, and it will be difficult to control it. Therefore, the amount of refueling per unit time must be relatively small when the tank is about to stop refueling when the tank is full.

However, when refueling, it is desirable to perform more refueling before the tank is full because the refueling time will be shorter and refueling can be performed more efficiently.

The present invention was invented to satisfy the above requirements, and its purpose is to increase the amount of refueling per unit time in the initial stage of refueling work, and to automatically reduce the amount of refueling when the tank approaches full. It is to provide a possible refueling method.

According to the present invention, the sensor provided in the nozzle detects when the tank is just about to become full, and the amount of oil supplied per unit time is reduced.

As mentioned above, during refueling work, splashes and foaming may generate a signal, but in the present invention, these splashes and foaming are used to temporarily stop refueling after the liquid level sensor issues the first signal after refueling. After a certain period of time, the amount of oil supplied per unit time is reduced.The certain period of time is the time during which the foaming disappears, and for example, about 3 seconds is sufficient.

When carrying out the present invention, it is preferable to control the amount of oil supplied using a flow rate control valve. However, the necessary programs can be incorporated into the control circuits of the motor and main valve.

According to the present invention, automatic stopping and restarting of refueling can be performed multiple times. The amount of refueling per unit time is made smaller each time the engine stops than the previous time.

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

FIG. 1 shows a typical oil supply system for carrying out the present invention, and the fuel supply machine S has a built-in pump 2 driven by a motor 1, and this pump 2 draws oil stored in a tank (not shown) into a suction pipe. Suction from 3 and discharge! ! It is set to be sent to 4. The discharge pipe 4 is provided with a meter 5 for measuring the flow 11 @ and a flow control valve 6 for controlling the flow rate, and the discharge pipe 4 communicates with the refueling nozzle 8 via the nozzle hose 7. There is. The flow rate signal from the meter 5 is sent to the controller 11 as a pulse signal from the transmitter 10.
sent to. The signal is then sent from the control station 11 to the display 12, where it is digitally displayed.

On the other hand, as will be described later, the valve drive section 13 is controlled by a signal from the control tlllli 111 to control the flow rate control valve 6, thereby controlling the amount of oil supplied.

In addition, 14 and 15 in the figure indicate a failure indicator of the flow control valve 6 and a failure indicator of the liquid level sensor 17, respectively.
The indicator shows the completion of 16-port refueling. The refueling nozzle 8 is provided with a liquid level sensor 17 and a refueling selection switch 18, and the refueling aS is provided with a nozzle switch 19 for detecting that the refueling nozzle 8 is accommodated.

Next, an embodiment of the present invention will be described with reference to FIG. 2, which shows a preferred control circuit of the present invention, and FIG. 3, which shows a time chart of a refueling operation. In the figure, the same components as in FIG. 1 are indicated by the same reference numerals.

When refueling, first remove the refueling nozzle 8 from the nozzle hook (point a in Figure 3). Then, a signal from the nozzle switch 19 erases the stored value of the previous oil supply amount in the counting circuit 20, and the display meter 12 displays zero. The signal from the nozzle switch 19 is then applied to the AND circuit AND1. Signals from the liquid level sensor 17h) are input to a sensor check circuit 21 to check whether or not the liquid level sensor 17 is out of order. Normally, this checking operation is confirmed to be normal when the refueling nozzle is removed from the nozzle hook and the liquid level sensor 17 is in a state where it is not detecting the liquid level but is in a state where it can detect the liquid level. In the case of a failure, it is displayed on the failure display 15', and when it is normal, the AND circuit AN
An input signal is applied to DI. Therefore, disconnections in the wiring of the liquid level sensor can also be detected. Therefore, in a normal case, the signal from the AND circuit AND1 is applied to the motor control circuit 22 to drive the motors 1 and 1, and the signal is also sent to the valve control circuit 23. When this valve control circuit 23 receives a signal from the AND circuit ANDI, a valve opening readout signal is sent to the valve opening storage circuit 24, and the read signal is sent to the valve control circuit 23. The valve opening degree storage circuit 24 is programmed to send, for example, 60 pulses as a valve opening signal to the valve drive unit 13 in the case of maximum discharge (4FJ/5in), and 40 pulses in the case of medium discharge (3o1/5in), for example.
It is stored that 30 pulses are sent for small discharge (2J/5in) and 10 pulses are sent for minimum discharge (3N/5in).

When a signal from the AND circuit AND1 is received, a signal of 10 pulses for minimum discharge (3Q/5in) is sent to the valve drive unit 13.

Although details will be described later, it is preferable to use a stepping motor as the valve drive unit 13, and in this embodiment, the control valve 6 is fully opened when the stepping motor is driven for 60 pulses. There is. When the initial signal is issued in this way, the valve drive unit 13 is activated by the signal from the valve control circuit 23 to reach the flow rate state shown at point b in FIG.

To determine the amount of refueling, insert the refueling nozzle into the refueling port, pull the lever and engage the latch 81 to start refueling. According to the present invention, completely automatic refueling is possible, so that the amount of refueling can be used for other tasks. This start of refueling is indicated by point 0 in FIG.

The transmitter 10 of the flowmeter 5 generates a flow rate pulse signal and sends the pulse signal to the counting circuit 20. The amount of oil supplied is counted by the counting circuit 20 and displayed on the display meter 12. Therefore, the opening degree of the flow rate control valve 6 is set to a small opening, that is, 3d
/win control, so even if you accidentally pull the lever before inserting the nozzle into the fuel filler port, for example when removing the nozzle from the nozzle hook, you can quickly return the lever and only a small amount will be discharged, which is less dangerous. . When the counting circuit 20 counts a predetermined amount, for example, 5 pulses (oil amount: 0.05Q), a signal is sent from the counting circuit 20 to the valve control circuit 23. This state is shown at point d in FIG. Then, as described above, the valve control circuit 23 sends a valve opening successive signal to the valve opening storage circuit 24. Then, the maximum discharge [45 (2/Wi
A signal for operating the stepping motor for 50 pulses (60-10=50) corresponding to n) is sent to the valve drive unit 13, resulting in a high-discharge oil supply operation. However, in order to prevent the liquid level sensor 17 from malfunctioning due to splashing of the oil removed, approximately 2 seconds are required to open the valve for high discharge oil supply. The starting point of this high discharge refueling operation is indicated by point e in FIG.

In this way, when high-discharge refueling work is performed and the tank becomes almost full and bubbles rise, or when the liquid level sensor 17 detects a rise in the liquid level due to splashing (of course, if the liquid level correctly indicates full), The signal from the liquid level sensor 17 is applied to the valve control circuit. (Figure 3, point f).

Then, a valve close readout signal (this signal is based on the constant valve opening) is input from the valve control circuit 23 to the valve opening memory circuit 24, and the readout signal 60 pulses (i.e., 60
The flow control valve is fully closed by the pulse) enters the valve control circuit 23, and a reversal signal of 60 pulses is applied from the valve control circuit 23 to the valve drive unit 13, which closes the flow control valve 6.
is fully opened. This state is indicated by 9 points in FIG. - It is assumed that the tank to be refueled now generates bubbling due to refueling, and the liquid level sensor 17 generates a signal due to the bubbling. Therefore, at the moment when the flow control valve 6 closes,
Liquid level control 17 is still giving a signal. The signals from this liquid level sensor 17 are connected to an AND circuit AND2 and an AND circuit.
3 is applied. Bubbles in the tank disappear within a certain period of time, for example, within about 3 seconds after the valve is closed. Valve as the valve closes! I.J.
A signal is sent from the ll11 circuit 23 to the timer 25,
A signal is sent from the timer 25 to the valve control circuit 23 after a certain period of time set by the timer 25, for example 3 seconds. This state is shown by the dots in the m3 diagram. At this time (after 3 seconds), the bubbles have disappeared, so no signal is generated from the liquid level sensor 17. Note that the case where a signal is generated from the liquid level sensor 17 after 3 seconds will be described later.

Due to the signal from the timer 25, a valve opening readout signal is input from the valve control circuit 23 to the valve opening storage circuit 24 in the same way as at point d, but now the oil supply amount is 30e, l! It is a signal of 40 pulses that becomes in, and the flow rate control valve is one stage throttle open, so it becomes the width meter output amount. (Figure 3 1
).

When refueling is performed with this small discharge, the tank is almost full, so the liquid level changer 11 issues a signal due to bubbling relatively quickly. This point is indicated by point j in FIG. 3, and the operation at that time is substantially the same as the operation at point f in FIG. 3, and its explanation will be omitted. The penetrating action is shown by the dot and the zero point in Figure 3.
This is substantially the same as described above regarding point 9 and point h in the figure.

Next, the same operation as described for point i in FIG. 3 is performed at the abandoned garden in FIG. However, the opening degree of the flow rate control valve 6 is 2012. - The discharge amount is small, 1n, and the valve drive unit 13 is designed to drive for 30 pulses at that time.

The point at which the liquid level sensor 17 detects the liquid level for the third time is indicated by point n in FIG. 3, and the flow rate control valve 6 is closed in the same manner as at point f. That point is indicated by 0 points.

Similarly, after about 3 seconds (point p in Figure 3), the flow rate control valve 6
10 pulses are given to the valve driving section 13 when the valve is opened at 3Q/5 inli once, which is a small discharge. Therefore, oil is supplied at a rate of 312/sin (Fig. 3q)
point).

At this time, a signal is sent from the valve control circuit 23 to the AND circuit AND2, and that signal continues to be applied. Then, when the liquid level sensor 17 issues a signal, the AND circuit AND2 issues a signal (point y in Figure 3). , the signal is sent to the integer oil supply control circuit 2G. Then, the current oil supply amount readout signal is sent from the circuit 26 to the counting circuit 20, and the signal enters the integer oil supply control circuit 26 again.
6, the amount of oil to be supplied is calculated as an integer value, for example, an integer value up to the digit of 0.1Q. This calculation may simply be carried out to the second decimal place, but in the case of pulse control, if the required amount is too small, the response of the valve 6 may not match the actual value, so for example, in the case of 23,549. is 23.6R, but in the case of 23.59 g, 11 pulses (one pulse is 0.01) are calculated, which is 23.7 ff. When this calculated number of pulses is transmitted from the counting circuit 20, a lubrication stop signal is input from the integer lubrication control circuit 26 to the valve control circuit 23 (point r in Figure 3), and the fluent control valve 6 is turned off in the same way. Close to. The refueling of Kiken is completed (point S in Figure 3). Then, this refueling stop signal causes the refueling completion alarm 16 to issue a notification, and the motor 1 is stopped.

In the above operation, for example, the tank is already full at point 0 in Fig. 3, and when the timer 25 outputs a valve open signal at 3 seconds, a detection signal is output from the liquid level sensor 17. shall be. In other words, it is assumed that the liquid remains in contact with the liquid level sensor 17 even after the bubbles in the tank disappear. Then the AND circuit AND
The output signal from 3 is sent to an integer refueling control circuit 26.

As a result, the same operation as explained above with respect to point P is performed and the oil supply is stopped.

In this way, the liquid level sensor 17 detects the liquid level for the first time, and (
This liquid level includes the liquid level caused by temporary rings such as bubbling and vibration of the liquid), and after the flow rate control valve 6 is fully opened by that signal, the discharge amount is sequentially reduced. This allows the tank to be filled up in a relatively short period of time without wasting liquid. The ejection amount does not have to be reduced stepwise as shown in the above embodiments, but can be successively reduced starting from the dots in FIG. 3, for example.

It is preferable to use, for example, a pulse motor as the valve drive unit 13 as described later, but this valve drive unit 13 is linked with a valve position detection unit 27 that indicates the position of the valve, and the signal from this valve position detection unit 27 is enters the valve opening determination circuit 28, and this valve opening determination circuit 28 determines the valve opening &! It is determined whether or not the valve 6 is driven correctly according to the signal output from the valve circuit 24, and if there is a failure, the valve failure alarm 14 indicates a failure and the motor 1 is stopped.

When the refueling selection switch 18 is pressed, the signal is input to the valve control circuit 23, and the flow rate control valve 6 is fully opened. Therefore, when the operator manually operates the refueling nozzle 8 to refuel, after the liquid level sensor 11 detects the liquid level and becomes fully open (white in Figure 1 3, 9), the valve at point i in Figure 3 The opening degree of 6 is fully open, that is, the oil supply amount is 45e 1n, and the oil supply operation can be continued without throttling the valve.

In such cases, integral lubrication is also not required. Such refueling work is preferable when an operator performs a 1:3 nt oil flow, and is suitable, for example, when refueling a light oil tank.

Next, referring to FIG. 4, a preferred embodiment of the fluency control valve 6 according to the present invention will be described. In FIG. The valve body 33 has a valve seat 34 on which a valve body 35 can be seated.
The outlet port 32 and the outlet port 32 are communicated with each other and are cut off from each other. A valve guide 36 is fitted into the outlet 32 to guide the opening and closing operations of the valve body 35.

This valve guide 36 has a flow path 31 in the center. The valve body 35 is formed into a cylindrical shape as a whole, and a hole 3946 is formed in the side wall 38 for controlling the position of the valve body 35 as described later.
A flow path 40 connecting the flow path 37 and the flow path 37 is formed.

The valve body 35 has a bellows 42 on the opposite side of the outlet 32.
and is pressed by a spring 44 via a spring receiver 43.

A drive casing 45 is attached to the valve body 33, and the drive casing 45 and the hollow 42 define a chamber 46.

A drive shaft 51 of a stepping motor 50 extends into the drive casing 45 , and a lever 52 is attached to the drive shaft 51 .
are integrally fixed. As mentioned above, the valve control circuit 23
When the stepping motor 50 rotates in response to a pulse signal from
It is designed to rotate between the fully open position shown at 2a. The tip of the lever 52 is connected to a valve body driving rod 53, and the rod 53 is connected to the needle valve rod 54, which is integral with the piston 41, with a gap 85, and the piston 41 is pressed by a spring 86. has been done. piston 4
1 has a poppet 5 for closing the flow path 37 via WIA.
5 is provided. During operation, it is assumed that the lever 52 is in the solid line position as shown in the figure. At this time, inflow is 0
31 is applied with hydraulic pressure from the pump 2, and this hydraulic pressure enters the chamber 46 through the hole 39 and presses the valve body 35 downward in the drawing, so the inlet port 31 and the outlet port 32 are will be cut off. Now, the stepping motor 50 rotates according to the number of pulses (for example, 0.45 degrees per pulse),
This rotation causes the lever 52 to rotate clockwise in the drawing.

Then, the piston 41 also moves upward in the drawing, and the liquid in the chamber 46 flows out through the flow path 40 and the flow path 37. Results room 46
The pressure horn becomes lower, the valve body 35 moves upward, the flow port 31 and the outlet 32 communicate with each other, and the liquid flows. A liquid flows into the chamber 4G from the hole 39, but since the piston 41 is moving upward, when the hole 39 is blocked by the piston 41, the liquid no longer flows into the chamber 4G, and the pressure in the chamber 46 decreases. Low hand, valve body 3
5 will start to move upward. Therefore, the position of the valve body 35 is always determined by the relationship between the piston 41 and the hole 39, ie, the amount of liquid flowing into and out of the straw chamber 46. That is, if the piston 41 is located upward, the valve body 35
If the piston 41 is located below, the valve body 35 is also located below. In this way, since the valve body 35 operates following the piston 41, the degree of opening is determined according to the rotational position of the stepping motor 50. In order to open the valve even in the event of a power outage or failure of the stepping motor 50, a power outage valve operating lever 56 or a liquid path 58 and an on-off valve 57 that communicate the outlet 32 and the chamber 46 are provided.

Such a flow control valve 6 can operate the needle valve rod 54 at high speed and can stop it at any arbitrary point. The valve opening/closing response is very fast and any flow rate can be selected, making it extremely suitable.

Next, a representative example of the liquid level sensor 17 implemented in the present invention will be described with reference to FIGS. 5 to 7.

The refueling nozzle, which is indicated by the symbol @8 in its entirety in FIG. By operating the lever 63, the main valve 6-4 opens, and oil passes through the check valve 65 and is supplied from the nozzle opening 66. 87 is lever 6
This is a latch that keeps 3 in the pulled state.

The configuration of the known oil supply nozzle 8 has been described above.

The liquid level sensor 17 implementing the present invention is provided near the nozzle opening 66, and the area between the crotches of the liquid level sensor 17 is separated from the nozzle flow path 67 by a partition plate 68. An opening 69 is formed to improve the flow of liquid within this compartment 70.

As shown in FIG. 6, the liquid level sensor 17 is composed of a light emitter 71 and a light receiver 72. and luminous body 1
A signal @ 73 that passes a current through the nozzle body 62 and a signal current from the photoreceptor 72 passes through the nozzle flow path 67 and is connected to a connector 74 provided outside the nozzle body 62. is used when the liquid level sensor 17 is replaced due to failure or the like.

In the illustrated embodiment, the refueling selection switch 18 is attached to the outside of the nozzle body 62, and when the refueling selection switch 18 is pressed, the valve 6 repeats full opening and closing as described above. Further, the signal line 15 passes through a flow path 76 in the nozzle body 62 and passes through the control device 11 (
(Fig. 1). In order to protect the signal line 15 from being twisted due to rotation of the swivel 61, the signal line 15 is covered with a spring 78 where it passes through the swivel 61. Note that a rotation restricting means 77 is provided to prevent the swivel 61 from rotating more than a predetermined angle relative to the nozzle body 62.

As the light emitter 71, for example, a light emitting diode (L, ED)
For example, a phototransistor is used as the photoreceptor 12.

As shown in Fig. 7, the fuel filler port 80 of the fuel tank ■
When the main valve 64 is opened, oil is supplied from the nozzle opening 66 through the nozzle flow path 67, but since the compartment 70 in which the liquid level sensor 11 is stacked is divided by the division plate 68, the oil is not supplied. The liquid level sensor 17 is not affected by the oil.

Then, when the liquid level L reaches the fuel tank T as shown in FIG.
There is a hole 69 above the liquid level in the compartment 7.
Oil can flow into 0.

When oil or bubbles flow into the compartment 70, the oil or bubbles block the light from the light emitter 71, causing the signal level from the photoreceptor 12 to decrease.
Next, we will explain the sensor check that can detect when the tank is full. When the refueling nozzle 8 is removed from the nozzle hook, there is no oil or bubbles in the compartment 70, so the signal level from the photoreceptor 12 is high. If this high signal level occurs, it is determined that the liquid level sensor 17 is not malfunctioning, and in other cases, it is determined that it is malfunctioning.

Note that the position of the hole 69 can be anywhere as long as the hole does not come into contact with the liquid before the liquid level sensor reaches the liquid.

As shown in below-F, according to the present invention, when the liquid level sensor detects the liquid level due to bubbling or the like, the amount of oil supplied is reduced.
The amount of refueling per unit time can be made relatively large, and refueling can be accurately stopped when the tank is full.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a refueling V7t1 implementing the present invention, FIG. 2 is a diagram showing an example of a control circuit implementing the present invention, FIG. 3 is a time chart showing an example of the present invention,
Figure 4 shows the present invention! 5 is a cross-sectional view of a refueling nozzle showing the location where the liquid level sensor according to the present invention is attached, and FIG. 6 is a cross-sectional view showing the arrangement of the liquid level sensor. FIG. 5 is a view seen in the direction of arrow X, and FIG. 7 is an explanatory diagram showing the place where the fuel supply nozzle is inserted into the fuel supply port of the fuel tank. 1...Motor 2...Pump
5...Meter 6...Flow rate control valve 8...Refueling nozzle 11...
...Control device j 17...Liquid level sensor

Claims (1)

[Claims] A sensor installed in the refueling nozzle detects when the tank to be refueled is about to become full, and a signal from the sensor is used to control the discharge amount from the refueling nozzle to be reduced, and then refueling is started when the tank is full. A refueling method characterized by stopping.