JPH01153497A - Oil feeder with gas sensor - Google Patents

Abstract

PURPOSE: To prevent the failure and malfunction of a sensor by detecting the full condition of the oil by utilizing a gas sensor. CONSTITUTION: When an oil face 65 is risen in accordance with the proceeding of the feeding, and a point 63 of an air-supply tube 22 is soaked, the oil itself is sucked for the oil gas, the concentration of the oil, gas is decreased, and a value of the detected concentration value signal (s) is lowered. When the value of the detected concentration value signal (s) is lowered to be agreed with a set C value of a second determination circuit 54, a stop signal (r) is output to de-energized a motor 16, and the oil intruded from the point 63 of the air-supply tube 22 is discharged by the compressed air from an air switching valve 35 for a specific time. After the time has passed, the air-supply tube 22 starts its suction again, on this occasion, as the oil face is stabilized, the oil gas in the tank 52 is sucked again and the value of the detected concentration value signal (s) is increased. On the other hand, a timer D60 outputs a small flow oil feeding start signal (i) for energizing the motor 16 at a low speed. Whereby the oil face is slowly risen again, a stop signal (r) is output when the oil face reaches the point 63 of the air-supply tube 22, the motor 16 is de-energized, and the oil feeding is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for automatically supplying fuel oil, which is used in gas stations and the like.

(b) Conventional technology and its problems At gas stations, the method of detecting the filling state is to use the flow velocity of the oil being supplied, and to mechanically stop the refueling completely by the effect of the negative pressure generated by the pentaly effect ( For example, Japanese Patent Publication No. 53-28645) and the original sensor method (for example, Japanese Patent Application Laid-open No. 58-41095) have been adopted, and float type and capacitive type have also been proposed.

However, the method using the Penchiley effect causes air bubbles to be mixed into the oil, resulting in foaming and malfunctions, and other sensor methods require the sensor to be installed in the wetted area, and the pre-cut n. In bad cases, or if the sensor gets wet with oil or has dust attached to it, malfunctions often occur.

(c) Structure for solving all the problems The present invention is a refueling system that allows the sensor to be installed away from the liquid-contacted parts and does not cause the above problems. The main points of the configuration are as follows: First, oil gas is sucked in through an air pipe that extends close to the snow discharged from the refueling nozzle, and the component gas to be detected is placed in the position where it comes into contact with the gas. All gas sensors are installed to generate a detected concentration value signal s2 according to the concentration of .

Second, the detected concentration value and the C value are compared with a judgment value setting circuit in which a C value is set, which is a concentration value smaller than the highest detected concentration value of the detection target component gas generated from the fuel oil type. A determination circuit is provided.

Alternatively, a judgment value setting circuit in which a false value is set, which is the rate of change of the detected concentration value of the gas sensor with respect to time and is a value when the detected concentration becomes small, and the rate of change of the detected concentration value with respect to time and α A determination circuit is provided to compare the value.

Alternatively, a judgment value setting circuit that stores the maximum detected concentration value of the detection target component gas generated from the fuel tank during refueling and also outputs a full set value signal indicating the F value, which is the calculated value after the stored value. and a determination circuit that compares the detected concentration value and the F value.

(b) As the refueling process progresses and the curved surface rises, the oil and gas generated from it will be sucked in, and at this time the amount of oil and gas that reaches the gas sensor will be extremely reduced. Therefore, the decrease in the concentration of the detection target component gas contained in this oil gas is determined by comparing it with the C value, jL value, or F value carefully set in the determination value setting circuit. The determination circuit outputs a refueling stop signal and stops refueling.

(E) Example First, regarding the first invention Section 1.2.3t 4A, 4B
.

This will be explained below based on FIGS. 5A and 8.

In FIG. 1, (1) is the housing of the refueling device, which is installed on an island (2) made of concrete.

(3) is a flow rate pulseless signal p? every time oil is metered (for example, 1/1001J)/I/)' from an oil storage tank (not shown) using a pump. Output.

(7) is a refueling nozzle equipped with a discharge pipe (8) at its tip and connected to a flow meter (5) via a rotary joint (9), a hose (10), and a connecting pipe αυ.

(2) is a nozzle detection switch, which sends a detection signal m when the nozzle/l/(7) is not engaged with the nozzle case 03.
' Outputs 2, and outputs non-detection = fni when it is removed.

α5t is the oil supply amount indicator α5T-indicator box,
αQ is pump (3)? Rotating pump motor, α
η is a control unit (described later) containing an electric circuit, and (g) is a alarm buzzer.

α1 is a switching unit that is a negative pressure generation source, and is extended from the compressor (E).
) is connected to the air supply pipe (4) that leads to the sensor chamber (E) formed in the nozzle case α1, and the air supply pipe (4) that leads to the sensor chamber (E) formed in the nozzle case α1 is connected to the air supply pipe (4) that leads to the sensor chamber (E) formed in the nozzle case α1. A) is formed in the air passage.

＠ is an air cutoff valve that is assembled integrally with the body (to), and consists of a cylindrical valve body (c) and a spring 4 that constantly biases this valve body (c) in the direction of completely closing the air passage (a). and an electromagnetic coil μ■ which, when energized, pulls the valve wi and opens the air passage (e) against the urging of the spring wire.

0υ is an injection nozzle, and when air is injected from its pores), negative pressure is generated in the negative pressure generation chamber formed around the nozzle /v (, 3υ).

The principle of this negative pressure generation is already widely known, so the explanation here will be omitted.

■ is a bypass path that connects the air passage (to the air passage), the negative pressure generation chamber (to), and the air supply pipe port.

μs is a sudden changeover valve, which connects the nitrogen passageway and the bypass passage (b). A cylindrical valve body (7) that communicates or blocks communication, and a spring that constantly biases the valve body (7) in the direction of completely cutting off communication between the bypass path and the air passage ρ, and when energized, the valve body c! 4
All 4 pull out and open the bypass path■ Electromagnetic carp/L' (2)
When the bypass passage (2) is closed, the compressed air sent from the air passage (c) is transferred to the valve body (7).
The injection nozzle /l1 passes through the groove (g) cut around the
Lead to 0D.

(G) is formed in front of the injection nozzle/L10υ and the air pipe C
! →The air passage leading to (in the negative pressure generation chamber 03, the highest value of negative pressure by communicating with the whole atmosphere? Regulating the negative pressure regulation passage to the negative pressure generation chamber) exceeds atmospheric pressure. The valve is closed by a spherical valve made of lightweight resin or the like.

2) is a Chatsuki valve (incorporated) force; a /11 ventilation plate that prevents the negative pressure from moving into the chamber Q.

In Fig. 3, ■ is a gas sensor installed in a position where it comes into contact with the oil gas that is guided into the sensor chamber @ or sent through the air pipe (c). Contains n
A detected concentration value signal S indicating a value corresponding to the concentration of a component gas to be detected, such as benzene, pentane, or a combustible substance, is output.

(7) is a wire mesh installed at the exit of the sensor chamber to prevent ignition, and the sensor chamber wire is exposed to the atmosphere through this wire mesh.

In FIG. 5A, ■ counts the number of flow rate pulse signals p in a counting circuit and outputs the counted value as a counted value signal l;
Display the amount of oil on the oil amount display (To).

0η is a pump motor drive circuit, in which the pump motor QO' is energized by the input of the refueling permission signal, and the detection signal m is input, that is, the inflection nozzle /I/(7) is stored in the nozzle case (to). or when the refueling stop signal r is input, the energization of the pump motor head is stopped.

Also, when the small flow refueling start signal i is input, when the pump motor αi - low speed is input, that is, the nozzle /L' (
When 7) is removed from the nozzle case (7), the compressor (E) is energized to produce compressed air, which is sent to the air pipe (2), and the energization of the compressor (A) is stopped.

0 is the air cutoff valve drive circuit and the nozzle detection switch (6)
When the non-detection signal n is output from the nozzle 1v (
When 7) is removed from the nozzle case (to), the air cutoff valve @ is energized to open the nitrogen air passage (c) and the air blow signal W, which will be described later, is activated.
It is deactivated by the disappearance of 3.

c4 is a clock signal generation circuit that continues to output the clock signal q, and 6p is a first judgment circuit that shows the value of the detected concentration value signal S and the oil type when the gas sensor (b) does not detect any target component gas. It is the intermediate value between the value when detecting the maximum concentration in the fuel supply nozzle /L' (A in Fig. 8 as the value detected when the force is inserted into the fuel filler port Q of G in the fuel tank value is set and
A set value signal u't- indicating the A value is output.

0 is the C value, which is a value slightly lower than the highest value (B value in the 8th factor) when the Gas Sensor (Incorporated) detects the highest concentration target component gas for the oil type in the second judgment value setting circuit. is set, and a setting signal C indicating the C value is output.

), the first judgment circuit compares the value of the detected concentration value signal S outputted from the gas sensor with the value of the set value signal U (value A), and the two match (point e in FIG. 8). A refueling permission signal h (one pulse) and a determination start signal V (one pulse) are output.

When the judgment start signal V is input in the second judgment circuit, Zeng compares the value of the detected concentration value signal S of the gas sensor ■ with the value of the set value signal C (C value) and outputs the detected concentration value signal. When both values match for the first time in the downward direction of the S value (point f in Figure 8) and for the second time (point g in Figure 8), a refueling stop signal r (one pulse) is output. When the l@Jth match is made, the match signal fX<one pulse), and when the second match is made, the match signal y (wamba/I/ ) c) and the notification signal ztl - a certain period of time ('fI:, for example, 10 seconds) )Output.

) is measured by counting the clock signal q with timer A, and the time is measured for 11 hours from the input of the non-detection signal n. ), for example, 2 seconds).

), the timer B counts the clock signal q to input the coincidence signal X, and when fL, the coincidence signal Then, a small flow refueling start signal i is output after 14 hours (for example, 5 seconds), which is the time it takes for the foaming on the front surface to subside.

II) is the air switching valve drive circuit and the air blowing signals NVI, W
2.

While any of W3 is input, the air switching valve (to) is driven to open the bypass path (■).

In addition, the detected concentration value signal S when the tip branch of the bent air pipe @ shown by the dashed line in Fig. 8 is immersed in oil and the suction state is maintained without switching from the suction state to the blowing state. The value decreases to the D value and stabilizes.

In the above configuration, the first embodiment, which is the first embodiment of the first invention, will be described below.

When the refueling nozzle (7) is removed from the nozzle case to start refueling, the output signal of the nozzle detection switch (2) changes from the detection signal m to the non-detection signal n.
In response, the following operations are performed.

■ Return of the count value to zero in the counting circuit 0Q (zero display on the oil supply amount display OQ) ■ Starting the compressor wire ■ Opening the air cutoff valve wire (the state shown in Figure 4B) ■ V due to the occurrence of the air blow signal Opening of the air switching valve (to) (air passage (to)
4B) Therefore, in the switching unit α, the compressor (1
) and the needle pressure tank Ia through the air supply pipe a]), and the compressed air passes through the air passage (e) and the bypass passage (partially through the injection nozzle to 0η pore). The air is sent to the air pipe (■) and the air pipe (A), but at this time, no negative pressure is generated in the negative pressure generation chamber (to), and the pressure becomes higher than atmospheric pressure, so the check valve (6) is ) is moved to the position shown in FIG. 4B to close the negative pressure regulating path (2), thereby increasing the efficiency of cleaning air by preventing air from escaping.

In addition, the compressed air (not including oil and gas) sent to the air pipe (2) is blown onto the sensor (2) to clean the sensor.Meanwhile, the compressed air sent to the air pipe (4) is blown to the air pipe (4). c) Cleaning (draining residual oil and gas) inside the tank will be performed. And 1. As time elapses, the air blowing signal Wl disappears, so the air switching valve () is energized or stopped, and the bypass passage (2) is closed by the valve body (). (Situation shown in Figure 4A) Then, the compressed air sent to the air passage (E) cannot enter the bypass passage (■) and the groove H'T of the valve body (7)
h and is injected only from the pore (2) of the injection nozzle A/C3υ.

The air jet from this pore (2) generates a negative pressure in the negative pressure generating chamber (as described above), and the air supply pipe @all valves are opened to suck in outside air. At this time, the outside air that is sucked in is mixed with the jet flow from the pore (2) and sent to the air pipe and reaches the gas sensor. At this time, due to the generation of negative pressure in the negative pressure generation chamber (to), the check valve (6) is displaced to the position shown in Fig. 4A, and the negative pressure adjustment path 0 is opened, and outside air also flows in from here. become.

The effect of this negative pressure adjustment path (2) will be described later.

The discharge pipe (8) of the refueling nozzle/l/ (7) is the refueling port (towards)
When it is inserted into the fuel tank Q (shape M in Figure 1), the oil gas in the fuel tank Q is sucked from the tip of the air pipe 4 and the air pipe (branch) is inserted.

The gas is sent to the negative pressure generation chamber) and sent to the sensor chamber (E) via the air pipe (F), where it is applied to the gas sensor (■). Then, the value of the detected concentration value signal S output from the gas sensor rises and matches the A value set in the first judgment value setting circuit (2) (0 point due to the 8th factor), and the first judgment circuit So refuels. A permission signal is output to energize the pump motor Ql.

Thereafter, the valve lever f4' of the nozzle (7) is operated to open a built-in valve (not shown) to supply oil.

As the oil supply progresses, the curved surface (2) rises, and as shown in FIG. 2, when the tip (-) of the air pipe (A) is immersed, the oil itself will be sucked in instead of the oil gas that was being sucked up to that point. In this case, only the oil gas that evaporates from the curved surface in the air pipe (2), that is, the inner diameter area, is supplied to the gas sensor ■, and the i of the oil gas at that time is extremely extreme compared to when the oil gas itself is sucked. will decrease.

Even if the amount of oil and gas decreases, i of the compressed air injected from the injection nozzle 3η does not change, so as a result, the concentration of oil and gas decreases, and the value of the detected concentration value signal S decreases.

In addition, if the air pipe @ sucks oil, the negative pressure adjustment path 0
The amount of outside air flowing in from η increases (there is a large difference in the pressure loss value when the air pipe (a) sucks oil gas and when it sucks oil, and the oil level inside the air pipe (a) The opening area of the negative pressure regulating path 0υ is set so that te4 can only rise to the height indicated by H, that is, so that even if the oil itself is sucked, it does not reach the gas sensor (2).

The value of the detected concentration value signal S decreases and matches (first match) with C 1fL set in the second judgment circuit □□□ (8th
Point f in the figure) and the second judgment circuit (G) output a refueling stop signal r to de-energize the pump motor αQ, and output a coincidence signal x=2 to cause the timer B (G) to time 12 hours. During these 12 hours, the air switching valve () is energized to open the bypass passage ■, and compressed air (for cleaning) is sent to the air pipe (A) and the air pipe (A), especially at the tip of the air pipe (A).
) to drain out the oil that has entered. After 12 hours have elapsed, the air switching valve (2) is deenergized and the bypass passage ■ is closed, so the air supply pipe (e) starts sucking again, but by this time the oil in the fuel tank has already stopped bubbling and the curved surface has stopped. Since it is stable below the tip of the air supply pipe (-), the oil gas in the fuel tank Q is sucked in again and the value of the detected concentration value signal S increases.

On the other hand, the timer D wheel is set 14 times after the match signal X is input.
When the time has elapsed, a small flow lubrication start signal i is output to energize the pump motor αat at low speed. By doing this, the pump (3) is rotated slowly and the nozzle /L' (7
) is supplied at a speed that does not stir up the oil, i.e., does not cause foaming, and the n1 curved surface slowly rises again until it reaches the position shown in Figure 2, at the tip of the air pipe. When the value of the detected concentration value signal S decreases again and matches the C value of the second judgment value setting circuit 0 (point g in Fig. 8) (second match), the refueling is stopped from the second judgment circuit Z. The signal r is output, the pump motor α is deenergized, and refueling is completed, and the coincidence signal fy is output, and the timer C is activated.
(e) The 13-hour time measurement is started and the buzzer (to) is energized by outputting the notification signal 2.

Since the timer 〇 (to) continues to output the air blowing signal w3 while measuring time t3, the air switching valve) is energized for 13 hours and the air feeding f (c), sensor ■, and air pipe 4 are cleaned. When the air blow signal W3 disappears after 9 or 13 hours, the compressor is turned off.

The air cutoff valve) is deenergized (valve closed) and the air switching valve) is deenergized to prepare for the next refueling.

Note that the compressor ■ is equipped with a check valve (not shown) at the connection with the air supply pipe ■υ, so even if the compressor (7) is de-energized, the compressed air in the stylus pressure tank ring will flow to the compressor (1). There will be no leakage through the media.

In addition, the C value set in the second judgment value setting circuit (b) should be set to a level that does not cause erroneous judgments, taking into account differences in oil manufacturer and gender, seasonal factors, and changes in oil and gas concentration during refueling. The value is set.

Next, a second embodiment, which is a second embodiment of the first invention, will be explained based on FIG. The same symbols will be used for the same functional parts, and the explanation thereof will be omitted. The same applies to embodiments 3.4.5.6 to be described later. - The difference between the second embodiment and the first embodiment is that the pump motor α in the first embodiment is energized by the input of the refueling permission signal and the small flow refueling start signal i, and is activated by the input of the refueling permission signal and the small flow refueling start signal i. In contrast, in the second embodiment, the pump motor αQ is energized by the generation of the non-detection signal n output from the nozzle detection switch (B), and is deenergized by the generation of the detection signal m. In addition, an oil flow control valve is inserted into the communication pipe (b) and an oil flow control valve driving circuit is added, which is not present in the first embodiment. The oil amount control valve (2) opens wide when the refueling permission signal is generated, opens slightly when the small flow refueling start signal i is generated, and is closed when the refueling stop signal r is generated.

That is, the only difference between the first embodiment and the second embodiment is whether the oil feeding is controlled by the pump motor Q or by the oil 1 control valve ■.

Next, the third embodiment, which is the first embodiment of the second invention, will be explained.
Section 1.2.3.4A regarding the embodiment of.

4B, 6A, and 8, the difference from the first embodiment is that the second judgment value setting circuit 64 is replaced by a change rate with respect to time of the concentration value signal S detected by the gas sensor. A third judgment value setting circuit is provided which sets an aL value, which is a value when the detected concentration value becomes small, and outputs a set value signal d indicating this a value. A third judgment circuit (70') which measures time by counting the clock signal qt and outputs the refueling stop signal r-2 when the conversion rate of the detected concentration value signal S with respect to time is The explanation of the same parts as the operation of the first embodiment is omitted, and the curved surface rises to the tip of the air pipe (A) for the first time.
The explanation will continue from the time of reaching .

As shown in Fig. 2, when the oil level reaches the tip, the detected concentration value signal drops 7L.As shown in Fig. 8, the slope of the gas sensor output curve is a value calculated by the angle ) matches 1 (first match), the third judgment circuit 10
is the refueling stop signal rf high output pump motor (10f
timer B by deactivating it and outputting a coincidence signal X.
During this t2 time, air switching is performed by 9PC.
I is energized to open the bypass path (2) and clean the air pipe (main) and air pipe (branch).

When time t2 has elapsed, the air switching valve (to) is deenergized and the bypass passage ■ is closed, so the air pipe can be sucked again. However, by this time, the oil in the fuel tank Q has already stopped bubbling and the curved surface is stable below the tip of the air pipe (A), so the oil and gas in the fuel tank Q is sucked into the fuel tank again and detected. The value of the concentration signal S increases.

On the other hand, the timer D- is t4 after the matching multiple X is input.
When time elapses, the small flow lubrication start signal i? Output to energize the bong motor afl.

By doing this, the pump (3) is rotated slowly and the discharge speed from the nozzle /L/ (7) is such that it does not stir up the oil, that is, it does not create bubbles. When it slowly rises to the position shown in FIG. 2 and reaches the tip of the air supply W (a), the value of the detected concentration value signal S decreases and is detected.

Then, the refueling stop signal r is output and the pump motor (I
When Q is deenergized and refueling is ended, a coincidence signal y is output, and timer C (to) starts counting 13 hours, and the buzzer (t) is energized by outputting notification signal 2.

Timer C (to) receives the air blow signal W during this 13-hour time period.
Since 3 f continues to be output, the air switching valve (2) is energized for 13 hours to clean the air supply a (c), sensor, and air supply official 4, and after nt3 hours have elapsed, the air supply signal W is output.
When 3 is extinguished, the compressor (E) is de-energized, the sudden cut-off valve (sub) is de-energized, and the gas switching valve (to) is de-energized to prepare for the next refueling.

Next, the fourth embodiment, which is the second embodiment of the second invention, will be described as No. 112, 314A, 4B? 513. To explain the differences from the third embodiment based on the diagram s, the pump motor 0 in the third embodiment is energized by the input of the refueling permission signal and the small flow refueling start signal i, and the pump motor 0 in the third example is activated by the input of the refueling permission signal and the small flow refueling start signal i, and the refueling stop signal is activated. r
In contrast, in the fourth embodiment, the pump motor M is energized by the generation of the non-detection signal n output from the nozzle detection switch @, and deenergized by the generation of the detection signal m. An oil flow control valve, which was not present in the third embodiment, is inserted into the communication pipe αυ, and an oil flow control valve drive circuit is added at point f'Lfc, and the oil control valve @ is It opens wide when a refueling permission signal is generated, and closes when a small flow refueling start signal i is generated and a small circle is generated, and when a refueling stop signal r is generated.

Therefore, the only difference between the third embodiment and the fourth embodiment is whether the oil supply is controlled by the pump motor Q0 or by the oil flow control valve.

Further, regarding the fifth embodiment, which is the first embodiment of the third invention, the first t 2 t 3 *4 A
t4B, 7A, 811Nk As will be explained below, the difference from the first embodiment is that the second judgment value setting circuit (b) is replaced with the highest value of the detected concentration value signal S from the beginning of the second judgment value setting circuit (b). (B value in Figure 8) and indicates a predetermined ratio value (subtracting the E value in the 8th area and the ratio value E value in Figure 8) from this memorized value, or preset it to the previous highest value. In addition, a value less than 1 is output as a set value signal indicating a multiplication ratio value (F value in FIG. 8).

The explanation of the fifth embodiment will be continued below, but the explanation of the same parts as the operation of the first embodiment will be omitted, and the curved surface will rise to 10
Explanation from the time you reach the tip of eye air tube 4? continue.

As shown in Figure 2, when the oil level reaches the tip, the value of the detected concentration value signal S drops and matches the F value (first coincidence) (point f in Figure 8), and the second The judgment circuit (to) outputs a high output of the refueling stop signal rf to de-energize the pump motor αCl, outputs a coincidence signal
Energize 19 and create a bypass road ■? Open the compressed air
Send the air pipe (for J + ning) to the air pipe (c) and air pipe wire,
In particular, it enters from the tip of the air pipe ■ and causes the next song to be discharged. 1
After 2 hours have elapsed, the air switching valve (to) is deenergized and the bypass passage ■ is closed, so the air supply pipe starts suction again, but by this time, the oil in the fuel tank has already stopped bubbling and the curved surface has stopped. Since it is stable below the tip of the trachea (4), the bent gas inside the fuel tank again? The value of the suction detection concentration value signal S increases.

On the other hand, the timer DC4 is set to 1 after the coincidence signal X is input.
After 4 hours have elapsed, a small flow lubrication start signal i is output to energize the pump motor QI Th at low speed. By doing this, the pump (3) is rotated slowly and the nozzle /v(
7) The oil is supplied at a speed that does not stir the oil, that is, does not cause bubbles, and the curved surface rises again to the second cause position and reaches the tip of the air supply S (A). When the detected concentration value signal S decreases again and matches the F value of the fourth judgment value setting circuit υ (2 points in Fig. 8), (
2nd match] The second judgment circuit outputs the refueling stop signal r, de-energizes the pump motor OQ, and ends the refueling, and at the same time outputs the matching signal y, and the timer C- is turned off to 1.
The 3-hour clock starts and the buzzer (g) is energized by the output of the medication signal 2, and then the clock stops.

Since the timers 〇 and ■ continue to output the blow signal W3 while counting time t3, the air switching valve) is energized for 13 hours, and the air pipe and sensor are activated. When the air pipe Q is cleaned and the air signal W3 disappears after 13 hours, the compressor (7) is deenergized.

Deenergizing (valve closing) of air cutoff valve (b), air switching valve (2)
This deenergizes the fuel and prepares for the next refueling.

Next, the sixth embodiment, which is the second embodiment of the third invention, will be explained based on Figures 1.2.3.4A, 4B, 7B, and 8. The difference from the embodiment W and 5 is that the pump motor DI in the fifth embodiment is energized by the input of the refueling permission signal and the small flow refueling start signal i, and is deenergized by the input of the refueling stop signal r. On the other hand, in the sixth embodiment, the pump motor αQ is the nozzle detection switch @
In the fifth embodiment, the next bending amount control valve ■ is connected. At the same time as it is inserted into the pipe aη, an oil flow control valve drive circuit is added, and the oil flow control valve opens wide when the refueling permission signal is generated and opens slightly when the small flow refueling start signal i is generated. It is closed when the refueling stop signal r is generated.

In other words, are the fifth and sixth embodiments about oil feeding control?
The only difference is whether the pump motor Q0 or the front 2 control valve ■ is used.

(F) Effect As mentioned above, the configuration is configured to detect when the oil is full using the gas sensor, so it can be used to generate negative pressure by the oil flowing inside the refueling nozzle. There is no risk of malfunctions caused by air mixing with the oil, which promotes oil foaming, and the sensor does not come into direct contact with liquid, unlike original sensors, floats, and static sensors, so there is no need to worry about sensor failure or malfunction. This is what you get when you don't have a refueling device.

[Brief explanation of the drawing]

Figure 1 shows the internal structure of the oil supply system, Figure 2 shows details of the tip of the discharge pipe, and Figure 3 shows details of the sensor chamber. , 4th A, B
The figures show the structure of the switching unit in different operating states, Figures 5A and B show the electrical circuits in the first and second embodiments, respectively, and Figures 5A and B show the electrical circuits in the third and fourth embodiments, respectively. The electric circuit in the example of 7A,
Figure B shows the electric circuit in the fifth and sixth embodiments, respectively. It is shown in a block diagram, and FIG. 8 is a diagram showing an output curve of the gas sensor. (3)...Pump (5)...Flowmeter (7)・
...Refueling nozzle Qυ, @, (c)...to the air pipe)
...-Sensor chamber @...Air cutoff valve (to)...
Air switching valve 0υ...Injection nozzle/l103...Negative pressure generation chamber (6)...Chatsuki valve (Foundation)...Ventilating plate patent applicant Tominaga Seisakusho Co., Ltd. 1st 2nd G': 3

Claims (7)

[Claims] (1) An oil supply pump, a flowmeter that measures the oil pumped by this pump, an oil supply hose that is an oil flow path connected to the flowmeter and extends outside the housing, and an oil supply nozzle at the tip of the oil supply hose, and one end is installed near the discharge pipe of the refueling nozzle, and the other end is connected to the negative pressure source, and the gas sucked through the air tube is installed during suction operation by the negative pressure source. a gas sensor that detects the concentration of the component gas to be detected generated from the oil and generates a corresponding detected concentration value signal s, and a B value that is the highest detected concentration value of the component gas to be detected generated from the type of refueling oil. a determination value setting circuit for setting a C value which is a smaller density value and outputting a setting value signal c indicating this C value; A refueling device with a gas sensor, comprising: a determination circuit that outputs a refueling stop signal r when the value of the detected concentration value signal s reaches the C value while decreasing. (2) An oil supply pump, a flowmeter that measures the oil pumped by this pump, an oil supply hose that is an oil flow path connected to the flowmeter and extends outside the housing, and an oil supply nozzle at the tip of the oil supply hose, and one end is extended to the vicinity of the discharge pipe of the refueling nozzle, and the other end is in contact with the air supply pipe connected to the negative pressure generation source and the gas sucked through this air supply pipe during suction operation by the negative pressure generation source. A gas sensor that is installed to detect the concentration of the detection target component gas generated from oil and generate a corresponding detected concentration value signal s, and the rate of change in the detected concentration value of this gas sensor over time, and the detected concentration value becomes smaller. a determination value setting circuit that outputs a set value signal d indicating the a value, a rate of change over time of the value of the detected concentration value signal s, and the set value signal d. 1. A refueling device with a gas sensor, comprising: a determination circuit that compares the a value with the value a and outputs a refueling stop signal r when the two match. (3) An oil supply pump, a flowmeter that measures the oil pumped by this pump, an oil supply hose that is an oil flow path connected to the flowmeter and extends outside the housing, and an oil supply nozzle at the tip of the oil supply hose, and one end is installed near the discharge pipe of the refueling nozzle, and the other end is connected to the negative pressure source, and the gas sucked through the air tube is installed during suction operation by the negative pressure source. a gas sensor that detects the concentration of the detection target component gas generated from the oil and generates a corresponding detected concentration value signal s, and stores the maximum detected concentration value of the detection target component gas generated from the fuel tank during refueling. and a set value signal k indicating a density value F smaller than the stored value.
and a judgment value setting circuit that outputs the value of the detected concentration value signal s, and compares the value of the detected concentration value signal s with the value of the F value, which is the value of the set value signal k, and determines whether the value of the detected concentration value signal s reaches the F value while the value of the detected concentration value signal s is decreasing. 1. A refueling device with a gas sensor, comprising: a determination circuit that outputs a refueling stop signal r when (4) The oil supply device with a gas sensor according to item 1, 2, or 3, wherein the oil supply pump is stopped when the oil supply stop signal r is generated. (5) The oil supply device with a gas sensor according to item 1, 2, or 3, wherein a valve provided in the oil supply path is closed upon generation of the oil supply stop signal r. (6) The refueling device with a gas sensor according to item 3, wherein the F value is a value obtained by subtracting a predetermined value from the maximum detected concentration value of the component gas to be detected generated from the fuel tank during refueling. . (7) The gas according to item 3, wherein the F value is a value obtained by multiplying the maximum detected concentration value of the detection target component gas generated from the fuel tank during refueling by a predetermined value less than 1. Oil supply device with sensor.