JPH0349837B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in oil supply devices.

As is well known, in a refueling device, a nozzle hook is provided on the main body of the refueling machine, and the refueling nozzle is hung on the nozzle hook during non-refueling operations, and during refueling operations, the refueling nozzle is removed from the nozzle hook and inserted into the fuel tank of a car, for example. do. Therefore, a nozzle switch is provided in the nozzle hook part of the main body of the refueling machine, and the nozzle switch detects that the refueling nozzle is removed from the nozzle hook, so that the refueling operation can be started. This nozzle switch is provided in the main body of the refueling machine, and must be constituted by a pressure-resistant explosion-proof switch provided in an explosion-proof box that is large in size and expensive.

Recently, refueling control has been implemented by installing an insertion sensor (detects whether the nozzle is inserted into the fuel tank's refueling port) and a liquid level sensor (detects the rise in the liquid level in the fuel tank) at the tip of the refueling nozzle. There are known techniques to do this. Such sensors are connected to an intrinsically safe circuit that includes a control device (microcomputer).

The present invention has been made in view of the above facts, and its purpose is to provide a refueling device that can easily perform refueling operations using a switch provided on the refueling nozzle without providing a nozzle switch on the refueling machine body. It is on offer.

According to the present invention, the insertion sensor and liquid level sensor provided at the tip of the refueling nozzle control the refueling means in the refueling device main body, and when the nozzle is inserted into the refueling port, refueling is possible and the refueling tank is automatically filled until it is full. In a refueling device that refuels and stops refueling in an emergency using a switch provided on the refueling nozzle, the switch is provided at a position of the refueling nozzle that engages the nozzle hook when the switch is hooked on the nozzle hook of the main body of the refueling device, and When the switch is activated, the lubrication means is stopped, and when the switch returns when there is an insertion signal from the insertion sensor, the lubrication means is unstopped, and when the switch is activated when there is no insertion signal, a lubrication end signal is issued, and there is no insertion signal. When the switch is reset, a control means is provided which resets the indicator displaying the previous lubrication and controls the lubrication means to be stopped in response to a subsequent insertion signal.

Therefore, the switch provided on the refueling nozzle performs the same function as the nozzle switch provided on the conventional nozzle hook, so that the conventional nozzle switch is no longer necessary. At the same time, since the switch is provided on the refueling nozzle, it can be used to stop refueling in an emergency, start refueling after inserting the refueling nozzle, etc., and can have different functions depending on the situation of the insertion sensor. I can do it. This improves refueling efficiency.

In carrying out the present invention, it is preferable that the switch provided in the refueling nozzle be configured with an intrinsically safe circuit. The switch can also be used for other purposes, such as an emergency stop.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refueling device embodying the present invention, in which a refueling device main body 1 is provided with a nozzle hook 2, and a pump 5 driven by a motor 4 pumps oil from a tank (not shown) to the refueling nozzle 3. Oil flow meter 6
through the hose 7. Then, a refueling nozzle 3 is inserted into a refueling port O of a fuel tank T of a car C parked near the refueling machine main body 1 to perform refueling work. The amount of fuel supplied to the fuel tank T of the automobile C is converted into a pulse signal by a pulse transmitter 8 provided in a flow meter 6 and displayed on a display 9. All of the above belong to known techniques.

FIG. 2 shows a refueling nozzle 3 embodying the present invention being hung on a nozzle hook 2.
A switch SW is provided near the lever guide portion 11 of the refueling nozzle 3. This switch SW is
When the refueling nozzle 3 is hung on the nozzle hook 2, its actuator a engages with a specific part, that is, the switch contact part 12, and turns on, and after the refueling nozzle is removed, it can be turned on and off manually. It's summery. A signal line _L1 extends from this switch SW.

On the other hand, at the tip of the nozzle portion 13 of the fuel supply nozzle 3, there is an insertion sensor 14 that detects that the nozzle portion 13 is inserted into the fuel filler port O of the fuel tank T, and a sensor 14 that detects that the oil level in the fuel tank T has risen. A liquid level sensor 15 is provided to detect the liquid level. A signal line L ₂ extends from each of these sensors 14 and 15. As shown in FIG. 2, these signal lines L ₁ and L ₂ extend through the interior of the refueling nozzle 3 and the hose 7 to the refueling machine main body 1. In the figure, l is a valve opening/closing lever for the refueling nozzle.

FIG. 3 is a detailed view of the sensors 14 and 15 at the tip of the nozzle portion 13 of the refueling nozzle 3. In the illustrated example, the insertion sensor 14 focuses on the fact that the fuel nozzle 3 faces downward when inserted into the fuel filler port, and the liquid level sensor 15 detects the light emitting body 22 and the light receiving body 2.
3 is provided facing the passage 16.
The insertion sensor 14 includes a light receiving body 24 and a light shielding body 19 that blocks light from the light emitter 22.

The light guide hole 17 directs the light from the light emitter 22 to the light receiver 1.
This is for sending to 4th. This light guide hole is in chamber 18.
This chamber 18 is provided with a light shielding body 19 . This light shielding body 19 is attached to the light receiving body 24 when the refueling nozzle is in the downward insertion position as shown in the figure.
When the passage 20 leading to is closed and the refueling nozzle is turned upward, it moves to the dotted line position 19a and the light emitter 22
This allows light from to reach the photoreceptor 24. Therefore, it can be seen that the light receiving body 24 receives the light from the light emitter 22, and when there is a light reception signal, the refueling nozzle is directed upward.

On the other hand, the photoreceptor 22 is turned off when the liquid rises through the passage 16 because the amount of light emitted from the light emitter 22 is reduced by the liquid. Air outflow holes 21 are provided to allow liquid to flow into the passage 16.

Next, the operation of the present invention will be explained with reference to FIGS. 4 and 5.

As long as the refueling nozzle 3 is hooked to the nozzle hook 2, the switch SW remains on. When the refueling nozzle 3 is removed for refueling, the switch SW turns off and the information is transmitted to the central control unit 33 controlled by the ROM 34 via the input/output circuit 35, and the control unit 33 determines that it is a refueling request (step S ₁ ). It's the next step. The previous oil supply amount stored in the oil supply storage unit 31 is then erased, and the display meter 9 is reset (step S ₂ ). Therefore, this switch SW
Refueling operations cannot begin until the is turned off.
Therefore, the signal from this switch SW is a refueling request signal.

Connect the nozzle portion 13 of the refueling nozzle 8 to the fuel tank T.
When inserted into the fuel filler port O, the light shielding body 19 moves to the solid line position in FIG. 3, so that it can no longer receive light from the light receiving body 24 and the light emitter 22 of the insertion sensor 14, and is turned off. The central control unit 33 determines that the preparation for refueling is complete. (Step _S3 ). Therefore, the signal from the insertion sensor 14 is a signal for determining whether or not preparation for refueling is complete. Based on the signal from the insertion sensor 14, the central control unit 33 of the control device C drives the pump motor 4 (step S ₄ ).
Once the pump motor 4 is driven, the operator pulls the lever 1 to open the valve provided in the refueling nozzle 3, and refueling is performed. At this time, the amount of refueling is counted in the refueling amount storage section 31 based on a signal from the pulse transmitter 8, and is displayed on the display meter 9.

When refueling is finished and the lever l is returned to close the valve and the nozzle is removed from the refueling port, the light shield 19 moves to the position 19a, so the light from the light emitter 22 is directed to the light receiver 2.
4 is received, and the signal is transmitted to the central control unit 33 (step S ₅ ). The central control unit 33 determines that this signal indicates the end of refueling, and stops the pump motor 4 (step S ₆ ). Next, hang the refueling nozzle 3 on the nozzle hook 2, and the switch SW will turn on (step
S ₁₁ ) Refueling work is finished.

During refueling, the central processing unit 33 determines whether (a) the insertion sensor 14 has detected that the nozzle has come out of the refueling port, (b) whether the liquid level sensor 15 has detected the liquid level, (c) Check three points: whether the switch SW was pressed or not. Therefore, while refueling one vehicle, the operator can work on another vehicle with peace of mind. For example, if the car being refueled starts running during that time and the refueling nozzle 3 is removed from the refueling port O of the fuel tank T, the refueling nozzle 3 will face upward, and the insertion sensor 14 will emit a light reception signal. i.e. step S ₅
In this case, when a signal from the insertion sensor 14 is generated, the pump motor 4 is stopped and no lubrication is performed (step S ₆ ). It has the function of determining whether or not it has come off. In the above description, the pump motor 4 is turned off, but the pump motor may be driven to close the main valve (not shown).

In step _S5 , if the nozzle falling signal is not emitted from the insertion sensor 14, it is determined whether or not there is a signal from the liquid level sensor 15 as to whether oil has risen into the passage 16 (step _S7 ). During refueling work, when the tank approaches "full", bubbles and droplets may reach the passage 16, and the liquid level sensor 15 may detect the liquid level. For this purpose, when a signal detecting the liquid level (bubbles or droplets) is received from the liquid level sensor 15 in step _S7 , the pump motor 4 is stopped and at the same time the timer 32 is set (step _S8 ). Normally, bubbles and droplets disappear after about 3 seconds have passed, so when the time set by the timer 32, that is, 3 seconds has passed (step S ₉ ), the liquid level sensor 15
It is determined whether a signal indicating that the liquid level is being detected is coming from (step _S10 ). At step S ₁₀
If YES, the tank is "full", so the pump motor remains off and the process moves to the next step _S11 . When the refueling operation is completed, the operator returns the nozzle lever l, pulls out the refueling nozzle 3 from the refueling port O, and hangs the refueling nozzle 3 on the nozzle hook 2 with the refueling nozzle 3 facing upward. When the refueling nozzle 3 is hung on the nozzle hook 2,
The switch SW is turned on (step _S11 ) and the work is completed.

In step _S10 , if the liquid level detection signal is not received from the liquid level sensor 15 (in the case of NO), the central processing unit 33 determines that refueling is still possible and turns on the pump motor 4 (step _S12 ). That is, what reaches the passage 16 is foam or droplets, and refueling begins again. In this case, return to step _S5 and repeat the above operation.

If the liquid level detection signal is not generated from the liquid level sensor 15 in step _S7 , it is determined whether the switch SW is pressed. If, for some reason, the operator wishes to stop the refueling operation in an emergency during refueling, all he has to do is press the switch SW.

That is, when the operator presses the switch SW during the refueling operation (step S ₁₃ ), the pump motor 4 is stopped (step S ₁₄ ). Therefore, as long as the switch SW is pressed (YES in step _S15 ), refueling will not be performed. When you release your hand from the switch SW (step
(NO in _S15 ), the emergency stop is canceled, the pump motor 4 is activated again (step _S16 ), and the process returns to step _S5 .

That is, in this embodiment, the central control unit 33 can determine an emergency stop and cancel the emergency stop in addition to determining a refueling request and determining the end of refueling by operating the switch SW.

If the switch SW is not pressed in step _S13 , the process returns to step _S5 . In other words, when oil is being supplied normally, the central processing section 33
S ₅ , S ₇ , S ₁₃ , S ₅ ... are repeated to confirm safety during refueling.

When refueling is finished, remove the refueling nozzle 3 from the refueling port O and turn it upward (step _S5 ), and after the pump motor has stopped (step _S6 ), press the switch SW by hand without hooking the refueling nozzle to the nozzle hook. (Step _S11 ) Then, if you let go of the switch SW, you can return to Step _S1 and refuel the next car. Normally, at a gas station, the refueling nozzle 3 is hung on the nozzle hook 2 before refueling the next car, but with the above configuration, the refueling nozzle 3 is not hooked on the nozzle hook 2 and the next car is refueled. This enables so-called continuous lubrication, which improves operability.

As described above, according to the present invention, the refueling nozzle is provided with a switch, and the signals from the switch are used as the refueling request signal and the refueling end signal, which not only streamlines the work, but also eliminates the bulky explosion-proof structure of the refueling machine body. There is no need to provide a box, and the main body of the refueling machine can also be simplified.

[Brief explanation of drawings]

Fig. 1 is a side view showing a refueling device embodying the present invention, Fig. 2 is a side view partially showing a refueling nozzle embodying the present invention hung on a nozzle hook, and Fig. 3 is a refueling device. FIG. 4 is a side cross-sectional view of the vicinity of the tip of the nozzle, showing a state in which the nozzle is inserted into the opening of a fuel tank of an automobile; FIG. 4 is a circuit diagram showing a control device implementing the present invention; FIG. It is a figure which shows the flowchart of the control apparatus shown in FIG. 1... Refueling machine main body, 2... Nozzle hook, 3...
Refueling nozzle, 4... pump motor, 13... nozzle portion, 14... insertion sensor, 15... liquid level sensor, C... control device, O... fuel tank opening.

Claims (1)

[Claims] 1 The insertion sensor and liquid level sensor provided at the tip of the refueling nozzle control the refueling means in the refueling device body, and when the nozzle is inserted into the refueling port, refueling becomes possible, and the refueling tank is automatically refueled until it is full, and the refueling nozzle In a refueling device that stops refueling in an emergency by a switch installed in the refueling device, the switch is installed at a position of the refueling nozzle that engages the nozzle hook when the switch is hooked to the nozzle hook on the main body of the refueling device, and when the switch is activated, the refueling stops. When the means is stopped and the switch returns when there is an insertion signal from the insertion sensor, the stop of the oil supply means is released.When the switch is activated when there is no insertion signal, a oil supply end signal is issued, and when there is no insertion signal, the switch is reset. The oil supply device is characterized in that it is provided with a control means for controlling a display meter displaying the previous oil supply to be reset and to release the stoppage of the oil supply means in response to a subsequent insertion signal.