JPH0532299A - Oil feeder - Google Patents

Abstract

PURPOSE:To judge the kind of oil accurately, effect a full tank oil feed automatically and prevent the operator from neglecting to put an oil feed nozzle back in place after completion of oil feed by a method wherein the kind of the oil to be fed is automatically judged, the oil is automatically fed only in the case of a correct result of the judgement and, after the tank is judged to be full, the completion of oil fed is informed. CONSTITUTION:An oil kind judging means 70 judges whether to feed gasoline or light oil based on the detection signal from a gas sensor GS. If the judged oil kind does not agree with the registered oil kind, a wrong oil kind informing means 71 actuates an informing device to give a warning. In the case of an automatic full tank oil feed, a full tank judging means 72 judges the tank to be full based on the detection signal from a flow amount pulse generator 4 when the number of times that oil feed has been interrupted reaches a predetermined value. On the other hand, if the judged oil kind is judged to agree with the registered oil kind, an oil feed means 73 starts oil feed. When the tank is judged to be full, an oil feed completion informing means 74 gives a warning to that effect. The above-mentioned features permit an accurate judgement of oil kind and an automatic full tank oil feed and prevent the operator from neglecting to put an oil feed nozzle back in place after completion of oil feed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling system that sucks vapor in a vehicle fuel tank to automatically determine the type of fuel oil, and when the oil types match, automatically refuels up to full tank. Regarding the device.

[0002]

2. Description of the Related Art There are two types of automobiles, one that uses gasoline as fuel and the other that uses light oil. If an incompatible fuel is used, the engine will be seriously hindered. For this reason, prior to refueling, the vapor in the vehicle fuel tank was sucked into the gas sensor to determine the oil type in the fuel tank, and the type of oil to be used in the vehicle matched the type of fuel oil to be refueled. There has been proposed an oil supply device capable of discharging fuel only in some cases (Japanese Patent Laid-Open No. 1-199900).

On the other hand, a so-called auto-nozzle refueling device has been put into practical use, in which a liquid level detecting means is provided at the tip of the nozzle and the liquid level detecting means detects the liquid and automatically stops refueling. If these two functions are combined to realize a device that automatically determines the type of oil and automatically refills the tank, the refueling progresses and the liquid level in the tank rises, causing bubbles of fuel oil to form in the nozzle opening. If the fuel oil reaches the nozzle or the fuel oil splashes to the nozzle opening, the automatic nozzle's automatic refueling mechanism will stop and refueling will stop. Even if you insert the nozzle into the machine and leave it for a while, refueling automatically stops when it is near full, so you can leave the refueling site and start another work, but you do not notice the refueling stop and it is unnecessary. There are problems such as continuing to operate the pump motor and making the refueling device idle to reduce the operating rate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to accurately determine the oil type of an automobile fuel tank, and to prevent bubbles of fuel oil and the like. (EN) Provided is a novel oil supply device capable of reliably and automatically refilling a full tank regardless of splashing, etc., and further, at the time of completion of full tank refueling, notifying the end of refueling and preventing the nozzle from being left unattended. That is.

[0005]

In order to solve such a problem, according to the present invention, in a refueling apparatus having a gas detection function and an automatic full tank refueling function, a detection signal from the gas detection means is received. An oil type determining means for determining a difference from the oil type registered in the oil supply device, activating an erroneous oil type notifying means when the oil type is different, and activating the oil supply means when the oil types match. A full tank determination means is provided for intermittently continuing the refueling a plurality of times until the full tank refueling is performed by the full tank detection function, and activating the refueling end notification means at the stage when the full tank refueling is completed.

[0006]

[Operation] When the fueling nozzle is inserted into the fuel tank of the automobile and the nozzle lever is pulled, the gas detecting means sucks the vapor of the fuel tank to determine whether or not it matches with the oil type registered in the fueling device. It is determined and if they match, the refueling device is activated. Then, when the full tank determination means determines that the fuel is filled up to the full tank, the refueling device is stopped and the fact is notified by the refueling end notifying means to prompt prompt post-processing.

[0007]

Embodiments of the present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 is an oil supply pump driven by a pump motor M, and a nozzle hose 3 is connected to a discharge port via a flow meter 2. However, the fuel oil in the underground tank is sent to the fueling nozzle 20 described later. The flow meter 2 is provided with a flow rate pulse transmitter 4, and a signal from this is displayed by the control device 5 on the display device 6 as the amount of refueling.

In the drawing, reference numeral 10 is an air supply source, and an air conduit extending from the air supply source is provided with a mist separator 12 and a regulator 13 as shown in FIG.
₁ , a second valve V ₂ , and a third valve V ₃ composed of a 3-port 2-position switching valve are connected in parallel, and the first valve V ₁ further includes a nozzle hook 8 via a vacuum ejector 14. Of the second valve V ₂ is connected to the air conduit 11 via the fixed orifice 16, and the third valve V ₃ is connected to the fixed orifice 17 through the fixed orifice 16. Connection to the air supply source 10 via the air supply source 10, and at the position a, the connection between the air conduit 11 and the vacuum ejector 14 which will be described later, b
In the position, the air supply source 10 and the air conduit 11 are connected to each other.

As shown in FIG. 3, in the air conduit 11, the vapor suction port 61 opened in the vicinity of the tip of the cylinder tip portion 22 of the refueling nozzle 20 passes through a stop valve 62 which is opened / closed by the movement of the lever 48, and inside the refueling device. At this point, the vacuum ejector 14 is connected via the gas sensor GS, the third valve V ₃ and the pressure switch PS. The first, second, and third valves V ₁ , V ₂ , V ₃ are electromagnetic valves driven by an output signal from the control device 5, and the first valve V ₁ is an auxiliary valve. By being energized, the flow path from the air supply source 10 to the vacuum ejector 14 is opened, and the inside of the air conduit 11 connected to the vacuum ejector 14 is set to a negative pressure so that the vapor is sucked from the suction port 61 via the air tube 64. To do.

The second valve V ₂ connects the air supply source 10 and the air conduit 11 by being energized, and the third valve V ₃
Is in the de-energized state at a position a which normally connects the air conduit 11 and the vacuum ejector 14 to each other, and after the oil type is determined, the refueling nozzle 20 is hooked on the nozzle, and then the signal from the control device 5 is applied. It is urged to switch to the b position, and the air conduit 11 and the air supply source 10 are communicated with each other so that the air supply source 1
0 from the air through the air tube 64 vapor conduit 6
It is configured to send to 0 to scavenge the inside.
Pressure switch PS provided in communication with the air conduit 11
Is configured as a responsive switch that turns on the switch by a diaphragm that deforms when the inside of the conduit 11 becomes negative pressure.

3 and 4 show an embodiment of an oil supply nozzle. One end of this oil supply nozzle 20 is a cylinder tip portion 2.
The air passage pipe 23 having an opening 23a is inserted near the tip of the check valve 2 and the other end is provided with the check valve 2 provided in the barrel portion 33.
5 and the negative pressure chamber 28 of the automatic valve closing mechanism 40.
It communicates with the inside. This check valve 25 is provided on the barrel 33.
The support member 65 provided on the
6 is always urged toward the main valve 36.

On the other hand, an end portion of the hose 3 communicating with the oil supply pump 1 is coupled to the side surface of the barrel body portion 33, and a flow path extending from here to the barrel tip portion 22 is provided with a spring 35 through a valve rod 34. Main valve 3 always urged to close the flow path
6 is provided, and on the side surface of the barrel 33,
As shown in FIG. 4, an automatic valve closing mechanism 40 that closes the main valve 36 by deforming the diaphragm 37 by the negative pressure generated in the negative pressure chamber 28 is provided. This automatic valve closing mechanism 40
Is the opening 2 located at the tip of the tube tip portion 22 of the air flow pipe 23.
3a operates so as to close the main valve 36 when it is blocked by liquid in the tank that receives refueling or bubbles, and the negative pressure chamber 28 that communicates with the air flow path pipe 23 is always kept outside by a spring 41. A diaphragm 37 urged toward one side is stretched, and a U-shaped piece 42 is fixedly mounted on the diaphragm 37. Two pins 43 that slide in the long holes of the piece 42 are attached to the diaphragm 37. The valve rod 34 and the push rod 45 are brought into contact with each other by positioning them in a notch 44 provided in a part of the valve rod 34 and then engaging and disengaging these with a recess 46 of a push rod 45 inserted in the valve rod 34. It is configured to be separated.

The push rod 45 is in contact with the rear surface thereof so as to constantly urge the lever 48 forward by a spring 47 acting on its rear end, and the lever 48 pivotally supported by a pin 49 at one end thereof. The push rod 45 is moved to the right in the figure against the spring 47 by pulling a certain amount or more, and the flow path is opened with the valve rod 34 and the main valve 36 connected to the push rod 45 via the pin 43. Has been done.

A valve seat 50, which is in contact with the main valve 36 and closes the flow path, is slidably disposed on the upstream side of the check valve 25 in the above-mentioned cylinder body 33. In addition to the function as a valve seat, the valve seat 50 releases the main valve 36, which is removed from the push rod 45 and abuts against the push rod 45 by the liquid level detection, from the hydraulic pressure generated due to the subsequent stop of refueling. Has the function of pushing it to the right in the figure by means of the pin 43 and connecting it again with the push rod 45 through the pin 43.
On the back surface of 0, a compression spring 51 for moving the main valve 36 to the right in the figure against the spring 35 acts.

By the way, the refueling nozzle 20 thus constructed is provided with a lever guard 52 for protecting the lever 48 below the barrel portion 33, and the notch 5 is provided here.
A lever locking member 54 having 6 is pivotably supported with a pin 55 as a fulcrum.

Reference numeral 60 in the drawing denotes a vapor conduit, one end of which is attached to a vapor suction port 61 which is opened at the tip of the cylinder tip portion 22, and the other end of which is attached to a support body 65 of the check valve 25.
The vapor suction port 61 is connected to a stop valve 62 described later through a through hole 67 formed in the support body 65 and a pipe 68. 62 is the stop valve described above, which is the lever 4
8 is provided with an operating rod 63, and in a state where the lever 48 is pulled down, the flow passage between the air tube 64 and the vapor conduit 60 is closed, and compressed air from the air tube 64 is supplied to the check valve 62a. To the vapor conduit 60 via the valve 48, and when the lever 48 is pulled up and locked in the notch 56, it opens in response to the lever 48 via the valve rod 63 to open the air tube 64 and the vapor conduit 60. It is configured to communicate.

FIG. 5 shows the functions to be performed by the microcomputer constituting the above-mentioned control device 5, and an oil type determining means 70 for determining whether gasoline or light oil is used based on the output level from the gas sensor GS. If the result of the determination is different from the oil type registered in this device, the alarm 7
To indicate that the oil supply has been interrupted based on the stop of the flow rate pulse from the flow rate pulse transmitter 4 and the interruption of the main valve 36 during automatic full refueling. A full tank determination means 72 for determining that refueling has been performed up to full tank when the number of times reaches a predetermined number;
When the matching of the oil types is confirmed by the oil type determining means 70, the pump motor M is operated to start the refueling, and when the main valve 36 is closed after the refueling is started, the pump motor M is turned on and off a predetermined number of times. Means 73 and refueling end notifying means 74 for notifying the fact that the replenishment determination means 72 has determined that the refueling is completed are programmed.

Next, the operation of the device constructed as described above will be described with reference to the flowchart shown in FIG. 6, taking an example in which the device is applied to a gasoline refueling device. Nozzle 20
When is removed from the nozzle hook 8, the nozzle switch SW is turned on (step a), and the control device 5 causes the display 6 to return to zero and energizes the first valve V ₁ to open it (step a). ). As a result, the air from the air supply source 10 flows into the vacuum ejector 14 and the air conduit 11,
The inside of the air tube 64 is made negative pressure. Since the lever 48 is still lowered in this state, the stop valve 62 connected to the vapor conduit 60 is in the closed state, which causes a strong negative pressure in the air conduit 11 and causes the pressure switch. PS is turned on by this negative pressure (step
C).

Under this state, the lever 48 is pulled down, so that as shown in FIG.
The valve seat 50 slidably mounted in the valve 3 is moved to the right in the figure to a position where it abuts against the stopper 39 by the urging force of the spring 51 acting on the back surface thereof. For this reason,
The main valve 36, which is urged by the spring 35 and is in contact with the valve seat 50, is also pushed back to the right in the figure, and the pin 43 located in the notch 44 of the valve rod 34 has the recess 46 of the push rod 45.
To engage the valve rod 34 and the push rod 45.

In this state, when the refueling nozzle 20 is inserted into the fuel tank of the automobile and the lever 48 is pulled to engage with the notch 56 of the lever engaging member 54, only the valve rod 63 of the stop valve 62 is pushed by the lever 48. Then, the stop valve 62 is opened.
As a result, the air containing vapor in the fuel tank rapidly flows into the air conduit 11 from the vapor suction port 61 through the vapor conduit 60 and the air tube 64, and the strong negative pressure of the air conduit 11 is rapidly lost. Pressure switch PS is OFF
(Step 2). Due to the pulling up of the lever 48, the pump motor M is still stopped in this state, the valve seat 50 does not receive the pressure to the left in the drawing, the valve seat 50 contacts the main valve 36, and refueling is performed. Absent.

When the vapor in the automobile fuel tank reaches the gas sensor GS due to the opening of the stop valve 62, the concentration of vapor of gasoline is higher than that of light oil, so that a signal exceeding the reference level Lg for gasoline determination is gas. Sensor GS
Is output from (step E), and for this reason the control device 5
Determines that the fuel of the vehicle to be refueled is gasoline, closes the first valve V ₁ and opens the second valve V ₂ , and simultaneously operates the pump motor M (step F). ).

Therefore, the valve seat 50 biased by the spring 51 and located on the right side in the drawing receives the hydraulic pressure from the oil supply pump 1 and moves back to the left side in the drawing to open the main valve 36. (Fig. 7
(Ii)) The gasoline sent from the refueling pump 1 is guided from the negative pressure generating portion 26 of the check valve 25 to the cylinder tip portion 22 and then supplied into the automobile fuel tank. When refueling is started in this manner, a negative pressure is generated in the negative pressure generating portion 26 of the check valve 25 due to the Venturi effect, and the inside of the air flow path pipe 23 opened here is tried to be negative pressure. The tube tip 22 side opening 23a of the air passage pipe 23 is in the atmosphere and sucks air, and this air flows into the negative pressure generating portion 26, and the inside of the air passage pipe 23 is maintained at atmospheric pressure. During refueling, the air of the air source 10 is throttled from the second valve V ₂ by the orifice 16 and then flows into the vapor conduit 60 via the air conduit 11 and the air tube 64 little by little to the air conduit 11, The inside of the air tube 64 and the vapor conduit 60 is scavenged to prevent the vapor from flowing into the gas sensor GS during refueling, thereby preventing the gas sensor GS from being deteriorated by being exposed to the vapor having a high concentration.

When the liquid level in the tank rises due to the subsequent refueling, and the opening 23a of the cylinder tip portion 22 is eventually closed by bubbles or splashes on the liquid level, the negative pressure communicating with the air flow pipe 23 is generated. The inside of the chamber 28 receives a negative pressure action in the negative pressure generating portion 26 to be a negative pressure, and this negative pressure attracts the diaphragm 37 upward in the figure against the spring 41, and the piece 42 integrated with the diaphragm 37 is pulled. The pin 43 is pulled up to be removed from the recess 46 of the push rod 45. As a result, the valve rod 34 released from the restraint by the pin 43 moves to the left in the figure by the urging force of the spring 35 together with the pin 43, and the main valve 36 is brought into contact with the valve seat 50 to move the pipe line. Close and stop refueling (Fig. 7 (ii
i)).

Since interruption of refueling stops the flow rate pulse from the flow rate pulse transmitter 4 connected to the flow meter 2, the control device 5 detects stop of refueling (step), stops the pump motor M, and refuels. The number of stops of the pump motor M from the start is incremented by 1 (step
H). On the other hand, the valve seat 50 released from the hydraulic pressure is
The main valve 36 is pushed by the urging force of 1 to move to the right in the figure, and at the end thereof, the valve rod 3 is again moved through the pin 43.
4 and push rod 45 are connected (Fig. 7 (i
v)).

A preset time after refueling is stopped,
That is, when the time of 1 to 2 seconds until the millet disappears (step), the control circuit 5 operates the pump motor M again (step). The gasoline delivered by the operation of the pump 1 moves the valve seat 50 to the left in the figure against the spring 51 in the same manner as described above, and the main valve 36
The valve seat 50 and the valve seat 50 are separated from each other to start the additional oil supply operation (FIG. 7 (ii)). Then, when the end of the opening 23a of the air passage pipe 23 on the cylinder tip portion 22 side is closed again by this additional oil supply, the automatic valve closing mechanism 40 operates to close the main valve 36 and stop the liquid supply as described above. To do. The control device 5 detects the stop of refueling (step), stops the pump motor M, and increments the number of times the pump motor M has been stopped since the start (step H).

After that, the steps (i) and (h) described above are carried out.
The above operation is repeated to perform intermittent additional refueling, and when this reaches the specified number of times, for example, three times (stepping), the control device 5 determines that the tank is full and stops the pump motor M. To finish all refueling operations,
At the same time, the alarm 7 notifies that the refueling is completed,
Prompt post-processing. As a result, it is possible to eliminate the inconvenience that the nozzle is left in the same vehicle and the operating rate is reduced even though the fuel supply is completed.

When the lever 48 is removed from the notch 56 and pulled down, the tip of the lever 48 is separated from the valve rod 63 and the stop valve 62 is closed. When the nozzle 20 is returned to the nozzle hook 8 and the nozzle switch SW is turned off (step
Operation of the alarm device 7 is stopped (step E).

The control device 5 closes the second valve V ₂ and switches the third valve V ₃ from the a position to the b position again (step w). As a result, a large amount of air from the air supply source 10 flows into the air tube 64, the check valve 62a provided in the stop valve 62 is opened, and the vapor remaining in these pipelines is discharged into the atmosphere together with the air. G
Clean S with fresh air. And for a certain time T
For example, after 5 seconds have elapsed (step C), the third valve V ₃ is returned to the a position (step Y) to prepare for the next refueling.

Before the tank is full, the lever 48 is returned to stop the fuel supply and the nozzle 20 is returned to the nozzle hook.
When the nozzle switch SW turns off (step),
The controller 5 stops the pump motor M (step
After that, the air tube 64 and the like are scavenged by the steps (wa) and (yo) described above to prepare for the next refueling.

On the other hand, from the time when the lever 48 is pulled up and the pressure switch PS is switched from ON to OFF (step D), the output of the gas sensor GS is below the gasoline judgment level Lg (step E). When a certain time elapses ΔT2, for example, 2.5 seconds is maintained (step S), the control device 5 determines that the fuel oil of the vehicle fuel tank is light oil and does not match the oil type of the refueling device. , The first valve V ₁ is closed, the second valve V ₂ is opened, and the alarm 7 notifies that the oil type is different (step). As a result, the air of the air supply source 10 flows from the second valve V ₂ into the air conduit 11, the air tube 64, and the vapor conduit 60 to scavenge them.

When the nozzle 20 is returned to the nozzle hook 8 and the nozzle switch SW is turned off (step N), the control device 5 stops the operation of the alarm device 7 (step N), and the following is performed. Due to the above steps (wa) and (yo), a large amount of air is used to guide the air conduit 11,
The air tube 64, the vapor conduit 60, and the gas sensor GS are scavenged to prepare for the next refueling.

In this embodiment, the gasoline refueling device is taken as an example, but when applied to a light oil refueling device, the step (e) in the flowchart shown in FIG. 6 becomes false (NO). When you step (to)
It is clear that the steps (1) to (3) should be executed.

In this embodiment, the nozzle of the type in which the hydraulic pressure from the pump is applied to the valve seat of the main valve to open the main valve has been described, but the main valve is opened and closed by air pressure. It can also be applied to things. Further, in this embodiment, the arrival of the fuel oil at the tip of the nozzle cylinder is detected by the rise of the vacuum pressure. However, the light emitting means and the light receiving means are provided at the tip of the nozzle cylinder to detect the rise of the liquid level. It is obvious that the same effect can be obtained even if the liquid level detecting means for detecting the change in the amount of light reaching the surface is used.

[0034]

As described above, according to the present invention,
In a refueling device equipped with a gas detection function and an automatic full tank refueling function, a detection signal from the gas detection means is received to determine a difference from the oil type registered in the refueling device. The oil type determination means that activates the erroneous oil type informing means and activates the oil supply means when the oil types match, and intermittently continues refueling multiple times until full tank refueling is performed by the full tank detection function. Since a full tank determination means for activating the refueling end notification means at the stage of completion of refueling of the tongue is provided,
Simply insert the car fuel tank and pull the lever to automatically determine the oil type.If the oil types are the same, perform multiple refueling operations until the tank is full to avoid bubbles and splashes. It is possible to reliably fill the tank with full oil regardless of the situation, and to notify the user when the full tank has been filled to prevent the nozzle from being left unattended, thereby increasing the operating rate of the oil supply device.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an oil supply apparatus of the present invention.

FIG. 2 is a pipe line configuration diagram showing an embodiment of a sampling mechanism of the same apparatus.

FIG. 3 is a side view showing an embodiment of an oil supply nozzle used in the present invention.

FIG. 4 is a top view of the oil supply nozzle shown in FIG.

FIG. 5 is a block diagram showing functions to be performed by a microcomputer that constitutes a control device.

FIG. 6 is a flowchart showing the operation of the above apparatus.

7 (i) to (iv) are explanatory views showing the operation of the nozzles shown in FIGS. 3 and 4, respectively.

[Explanation of symbols]

 1 pump 2 flow meter 3 oil supply hose 4 flow rate pulse transmitter 5 controller 6 indicator 7 alarm 14 vacuum ejector 20 nozzle 21 air conduit 23 vapor conduit 23a vapor suction port 25 check valve 36 main valve 40 automatic valve closing mechanism 48 lever 50 valve seat 62 stop valve 64 air tube PS pressure switch GS gas sensor SW nozzle switch

Claims (1)

Claim: What is claimed is: 1. A refueling apparatus having a gas detection function and an automatic full tank refueling function, which differs from the oil type registered in the refueling apparatus in response to a detection signal from the gas detection means. The oil type determining means for activating the erroneous oil type notifying means when the oil types are different, and for activating the oil replenishing means when the oil types are the same, and intermittently until a full tank refueling is performed. A refueling device comprising: a full tank determination means for activating the refueling end notification means at a stage where the refueling is continued and the full refueling is completed.