JPH06122500A - Erroneous feed preventing device for oil feeder - Google Patents

Abstract

PURPOSE:To ensure the prevention of erroneous oil feed even upon angular displacement of an operating lever before completion of oil kind identification by a method wherein a suction shielding means is provided in an air passage to shield suction force from application to a gas suction hole in conjunction with the operating lever. CONSTITUTION:The kind of oil is identified in a manner wherein the gas vaporized from fuel oil in a vehicle fuel tank is drawn in through a gas suction hole 17 at the end of an oil feed nozzle 1 and conducted through an air passage 18 into an oil kind identifying means 36 including a gas sensor 30 in the housing 23 of an oil feeder 21. When the oil is identified to be a proper one, a pump 25 is driven to force feed the fuel oil to an oil feed nozzle 1 and an operating lever 10 is angularly displaced to deliver the fuel oil from the oil feed nozzle 1. In such a wrong feed preventing device, a change-over valve V is provided in the air passage 18 which, when the operating lever 10 is accidentally operated before the oil kind identification, shields suction force from application to the gas suction hole 17 in conjunction with the lever operation in order to create a gas shielded condition, thereby inhibiting the operation of the pump 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous oil supply prevention apparatus which can be suitably implemented in an oil supply apparatus having a so-called contamination check function of sucking gas near the tip of an oil supply nozzle to determine the type of oil.

[0002]

2. Description of the Related Art Conventionally, vaporized gas of fuel oil in a fuel tank of an automobile or the like is sucked from a gas suction hole formed near a tip of a fueling nozzle and guided to a gas sensor to discriminate the oil type. When the oil type matches the oil type of the fuel oil to be discharged from the refueling nozzle, the pump is driven to pump up the fuel oil in the underground tank buried underground in the gas station, and After that, the pressure is fed to the refueling nozzle, and by pulling the operation lever provided on the refueling nozzle in this state, the on-off valve that has blocked the oil passage of the refueling nozzle is opened, and the fuel oil that has been fed under pressure An oiling device is used that is configured to discharge after confirming a match.

In such a prior art, since the refueling hose is made of a material having flexibility and elasticity such as rubber, when the operation lever is returned when a predetermined refueling amount is reached, The pump is stopped while the refueling hose is inflated by the discharge pressure of the pump in the driving state, and if the operator angularly displaces the operation lever before the oil type is discriminated at the start of the next refueling, the pump is stopped. Even in this state, the fuel supply hose contracts due to the elastic recovery force, and a small amount of fuel oil of about 1 to 2 cc flows out from the fuel supply nozzle. The vaporized gas of the fuel oil is sucked from the gas suction hole, and it is determined that the oil types are the same, and by such an erroneous detection, the refueling is permitted, the pump is driven, and the oil types are different. Regardless of this, there arises a problem that the light oil vehicle is refueled with gasoline by the refueling nozzle for gasoline, or the light vehicle is refueled with light oil by the refueling nozzle for light oil.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a gas sensor in which the vaporized gas of its own fuel oil flowing out from the refueling nozzle is operated even if the operation lever is angularly displaced before the discrimination of the type of oil is completed. It is an object of the present invention to provide an erroneous oil supply prevention device for an oil supply device, which is capable of reliably preventing erroneous oil supply by being prevented from being guided to.

[0005]

According to the present invention, a pump for pumping fuel oil and a fueling nozzle are connected to each other by a fueling hose having flexibility and elasticity, which is formed near the tip of the fueling nozzle. The gas sucked from the gas suction hole is guided to the gas sensor through the ventilation path to determine the oil type, and when the oil type matches the oil type of the fuel oil, the pump is driven to supply the fuel oil to the fuel supply hose. In an erroneous oil supply prevention device for an oil supply device that discharges the fuel oil by pressure-discharging it to an oil supply nozzle and operating the operation lever to perform angular displacement operation, in the ventilation path, to the gas suction hole by operating the angular displacement operation lever. Is an erroneous oil supply prevention device for an oil supply device, characterized in that an absorption force cut-off means for cutting off the suction force is interposed.

Further, according to the present invention, a pump for pumping fuel oil is connected to an oil supply nozzle by an oil supply hose having flexibility and elasticity, and suction is made from a gas suction hole formed near the tip of the oil supply nozzle. The generated gas is guided to the gas sensor through the ventilation path to determine the oil type, and when the oil type matches the oil type of the fuel oil, the fuel oil is pressure-fed to the oil supply nozzle through the oil supply hose, and the operation lever is operated. In an erroneous oil supply prevention device for an oil supply device that discharges the fuel oil by operating the angular displacement of, an air opening means intervening in the air passage for opening the air passage on the gas sensor side to the atmosphere in conjunction with the operation lever. An erroneous oil supply prevention device for an oil supply device.

[0007]

According to the present invention as set forth in claim 1, the pump for pumping up the fuel oil and the fueling nozzle are connected by a fueling hose having flexibility and elasticity, and the vicinity of the tip of the fueling nozzle. A gas suction hole is formed in the. The gas sucked from the gas suction hole is guided to the gas sensor through the ventilation path to discriminate the oil type. When this type of oil matches the type of fuel oil pumped by the pump,
Fuel oil is pressure-fed to the fueling nozzle through the fueling hose.
In this state, the operator angularly displaces the operation lever to discharge the fuel oil from the oil supply nozzle. Suction force blocking means is provided in the ventilation path, and the suction force blocking means blocks the suction force to the gas suction holes by angularly displacing the operation lever. Therefore, even if the operation lever is angularly displaced while the determination of the oil type is not completed, there is no possibility that the gas around the gas will be sucked from the gas suction hole, and therefore the oil supply hose contracts due to the elastic recovery force to refuel. Even if a little fuel oil flows out from the nozzle,
The vaporized gas of the fuel oil is surely prevented from being guided to the gas sensor and discriminating the oil type based on the vaporized gas of the fuel oil of its own, and erroneous refueling is prevented.

According to the second aspect of the present invention, the pump for pumping up the fuel oil and the fueling nozzle are connected by a fueling hose having flexibility and elasticity, and the vicinity of the tip of the fueling nozzle. A gas suction hole is formed in the. The gas sucked from the gas suction hole is guided to the gas sensor through the ventilation path to discriminate the oil type. When this oil type matches the oil type of the fuel oil pumped up by the pump, the fuel oil is pumped to the oil supply nozzle through the oil supply hose. In this state, the operator angularly displaces the operation lever to discharge the fuel oil from the oil supply nozzle. Atmosphere opening means is provided in the ventilation path, and the atmosphere opening means shuts off the ventilation path on the gas sensor side by angularly displacing the operation lever. Therefore, even if the operation lever is angularly displaced while the discrimination of the oil type is not completed,
There is no possibility that the gas around the gas suction hole will be sucked, and therefore even if a small amount of fuel oil flows out from the fueling nozzle due to contraction due to the elastic recovery force of the fueling hose,
The vaporized gas of the fuel oil is surely prevented from being guided to the gas sensor and discriminating the oil type based on the vaporized gas of the fuel oil of its own, and erroneous refueling is prevented.

[0009]

1 is a sectional view showing an oil supply nozzle 1 according to an embodiment of the present invention. The refueling nozzle 1 is a refueling nozzle body 3
And a discharge pipe 5 communicating with an oil passage 4 formed in the main body 3. The oil passage 4 is a valve seat 6 discharged inward in the radial direction.
The valve seat 6 is closed by the valve body 7. Disc 7
A valve rod 8 is fixed to the valve rod 8, and the valve rod 8 elastically abuts on an operating lever 10 which is angularly displaceable in the directions of arrows A1 and A2 around the axis of a pin 9.

A pipe joint 13 is provided at the connecting portion 11 of the main body 3.
The refueling hose 14 is connected by. The fuel supply hose 14 is made of a flexible and elastic material such as rubber, and slightly expands due to the pressure of the fuel oil fed under pressure. Therefore, as will be described later, even when the pump for pumping fuel oil is stopped, when the valve body 7 closes the valve hole 15 and the refueling is finished while the pump was driven by the previous refueling, the refueling hose 14 is kept in a swollen state by the discharge pressure of the pump. In this state,
The next refueling starts and the operator undesirably operates the operation lever 10
When the valve element 7 is opened by performing angular displacement operation in the direction of arrow A1, the fuel oil of about 1 to 2 cc is pushed out by the contracting force of the refueling hose, although the pump is not driven. Flow out from 5. The vaporized gas of the fuel oil flowing out from the discharge pipe 5 in this way is sucked from the gas suction hole 17 formed in the vicinity of the tip portion 16 of the discharge pipe 5, and the inlet pipe forming a part of the ventilation path. Via road 18,
The gas is introduced into the outlet line 19 via a switching valve V which is a suction force blocking means for blocking the suction force to the gas suction hole 17. The inlet side conduit 18 and the outlet side conduit 19 may be, for example, a metal or synthetic resin tube body having an inner diameter of about 2 mm.

In the vicinity of the tip portion 16 of the discharge pipe 5, again,
A liquid level detecting hole 20 is formed at a position different from the gas suction hole 17 by 180 ° in the circumferential direction so as to face downward and open, and the discharge pipe 5 is inserted into a fuel filling port of a fuel tank such as an automobile. When the liquid level of oil rises, the liquid level detection hole 2
Blocked by fuel oil or its bubbles that have risen to 0,
When the negative pressure rises, it is detected that the tank has reached near full, and the pump is stopped, or the solenoid valve provided in connection with the pipeline extending from the pump is shut off to automatically stop refueling. Is configured to.

FIG. 2 is a simplified cross-sectional view showing the overall construction of an oil supply device 21 having the oil supply nozzle 1 shown in FIG. In the housing 23 of the oil supply device 21, a pump 25 for pumping fuel oil stored in an underground tank (not shown) via an oil supply pipe 24, a motor 26 for driving the pump 25, and an oil supply pipe 27 from the pump 25. A flow meter 28 for measuring the flow rate of the fuel oil discharged via the
8, a flow rate pulse transmitter 29 that outputs a flow rate pulse signal s1 of 1 pulse for every 1/100 liters corresponding to the measured value measured by the flow meter 28, and the outlet pipe. A gas sensor 30 that guides gas to be sucked through the passage 19, a nozzle case 31 to which the refueling nozzle 1 is detachably attached, and a low level when the refueling nozzle 1 is attached to the nozzle case 31, A nozzle detection switch 33 that outputs a high-level nozzle detection signal s2 in the removed state, an oil type detection signal s3 having an output level corresponding to the gas sucked from the gas sensor 30, the flow rate pulse signal s1, and the nozzle detection signal. s2 is input and these signals s1 to s3
In response to the motor drive signal s4 and the display signal s5, and a display 35 for displaying the amount of oil supply in response to the display signal s5.

As the gas sensor 30, a gas sensor of contact combustion type, semiconductor type, linear thermal conduction type, diaphragm galvanic cell type, zirconia type or the like is appropriately selected and used.
The display 35 is realized by, for example, a plasma display tube.

The gas sensor 30 has the inlet line 18
And an ejector that is guided to the gas suction hole 17 via the outlet side conduit 19 to generate a suction force, and the respective conduits 18, 19
Also, the oil type determination means 36 includes an air supply means for supplying air to the gas sensor 30 for cleaning.

When the refueling nozzle 1 is removed from the nozzle case 31, the nozzle detection signal s2 of the nozzle detection switch 33 changes from low level to high level, and in response to this change, the control means 34 sends the air supply signal s6. Is output to the oil type determination means 36 to drive an air supply means (not shown) to discharge the vaporized gas of the fuel oil sucked by the previous refueling remaining in the pipelines 18 and 19 and the gas sensor 30 for cleaning. Let it be done. After continuing such a cleaning operation for a predetermined time, for example, 1 second, the control means 34 outputs the suction signal s7 to switch the solenoid valve (not shown) to guide the compressed air from the air supply means to an ejector (not shown). A negative pressure is generated, and this negative pressure is introduced into each of the conduits 18 and 19 to suck the gas around the gas suction hole 17. In this state, the operator who holds the refueling nozzle 1 discharges the discharge pipe 5 to the refueling port of the automobile that has come to receive refueling.
Is inserted to suck the vaporized gas of the fuel oil existing in the fuel tank, guide it to the gas sensor 30 and output the oil type detection signal s3, and the control means 34 discriminates the oil type, and the oil type is detected. When they match, the motor control signal s4 is output to drive the motor 26, and the pump 25 is driven by this, and the fuel oil is pressure-fed to the refueling nozzle 1.

FIG. 3 is a sectional view showing a specific structure of the switching valve V. In the cylinder 38 of the switching valve V, a piston chamber 40 in which a piston 39 is movably accommodated, and a communication hole communicating with the first space 41 and the second space 43 of the piston chamber 40 partitioned by the piston 39. 44,
A valve hole 45 that opens the first space 41 to the atmosphere, a connection hole 46 that communicates with the second space 43 and is connected to the inlet pipe line 18, and a communication hole that communicates with the first space 41 and the outlet side. Pipeline 19
And a connection hole 47 to which is connected. A pressing rod 49 having a hemispherical contact surface 48 formed at one end in the axial direction is fixed to the piston 39, and the piston 39
A valve rod 50 is fixed on the side opposite to the pressing rod 49. The valve rod 50 has a valve seat 51 that constitutes a part of the valve hole 45.
Sit down.

A compression coil spring 53 for elastically pressing the piston 39 in a direction away from the valve seat 51 is housed in the first space 41, and an operator pulls the operation lever 10 in the arrow A1 direction. In the state where it does not exist, the part 5 of the operation lever 10
3 abuts against the abutting surface 48 of the pressing rod 49 and presses it, and the valve hole 45 is closed by the valve rod 50.
In such a state, the compression coil spring 53 elastically presses the piston 39 in a direction away from the valve seat 51. The negative pressure generated by the oil type determination means 36 is guided from the outlet side pipe line 19 to the first space 41 via the connection hole 47, passes through the communication hole 44 to the second space 43 and the connection hole 46, and enters. The gas is introduced from the side pipe 18 to the gas suction hole 17, and the gas around it is sucked. In this state, when the operator pulls the operation lever 10 in the arrow A1 direction, the operation lever 1
The zero portion 53 is angularly displaced in the direction of arrow B around the axis of the pin 9 as indicated by an imaginary line 53a, so that the piston 39 is displaced by being pressed to the left in FIG. 3 by the compression coil spring 53. As a result, the connection hole 46 is closed by the outer peripheral surface of the piston 39, and the valve rod 50 separates from the valve seat 51 to open the valve hole 45 to the atmosphere. The negative pressure thus guided to the outlet side pipe line 19 is supplemented by the air flowing through the valve hole 45, and the suction force to the gas suction hole 17 is blocked. Therefore, the valve body 7 is opened and the fuel supply hose 14 is opened while the pump 25 is stopped by the angular displacement operation of the operation lever 10 in the arrow A1 direction.
Even if the fuel oil is pushed out of the tip portion 16 of the discharge pipe 5 due to the contracting force of the fuel pipe, there is no possibility of sucking the vaporized gas of the fuel oil, thereby preventing the false detection of the presence of gas in both gasoline and light oil. You can

FIG. 4 is a flow chart for explaining the refueling operation by the refueling device 21. First, step n
In step 1, when the vehicle comes to the fueling station to receive refueling and the worker removes the refueling nozzle 1 from the nozzle case 31, the refueling operation is started, and the nozzle detection signal s2 of the nozzle detection switch 33 is started.
Changes from low level to high level, and the control means 34
Outputs the air supply signal s6, the sampling operation is started in step n2. For example, after the gas is sent to the gas sensor 30 and each of the conduits 18 and 19 for about 1 second for cleaning, the control means 34 outputs the suction signal s7 to switch to the suction operation, and the suction force is applied to the gas suction hole 17. Be guided. In such a state, as shown in FIG. 3, the piston 39 is arranged between the connection holes 46 and 47, and the valve hole 45 is closed by the valve rod 50.

At step n3, the operator operates the operation lever 10
When the arrow mark A1 is pulled in the direction of arrow A1, the process moves to step n4, and it is determined whether 10 seconds have passed since the fueling nozzle 1 was removed from the nozzle case 31 in step n5 with the output of the gas sensor 30 unchanged. When the output of the gas sensor 30 does not change even after such a set time elapses, the process proceeds to step n6, and an error is displayed on the display device 35 as if the operation lever 10 was operated before the determination of the oil type is completed. If the predetermined time of 10 seconds has not elapsed in step n5, the process returns to step n3 and the operation lever 1
It is determined whether 0 is drawn in the arrow A1 direction. If it has not been pulled, the process proceeds to step n7, and the gas suction hole 1
It is determined by the suction force guided to 7 whether the gas guided to the gas sensor 30 is gasoline gas. At this time, if it is not gasoline gas, the process proceeds to step n5 again, and it is determined whether the set time of 10 seconds has elapsed. If the gas is gasoline gas in step n7, the process proceeds to step n8 to end the sampling operation and pump 2
5 is driven, and the operation lever 10 is moved to the arrow A at step n9.
Refueling is started by pulling in one direction. When the liquid surface reaches and closes the liquid level detection hole 20 in step n10, it is determined that the tank is full, and the refueling operation ends in step n11.

As described above, the pump 25 is used only when it is determined in step n7 that the gas is gasoline gas.
Since it is driven, it is possible to surely prevent accidentally refueling the light oil vehicle with gasoline.

In the above-described embodiment, when the operation lever 10 is angularly displaced while the oil type is being detected, the piston 39 is displaced to close the communication hole 44 and the connection hole 46, whereby the negative pressure from the outlet line 19 is reduced. However, as another embodiment of the present invention, as shown in FIG. 5, the valve hole 45 is closed by the valve rod 50, and the first space 41 is closed. When the valve rod 50 is separated from the valve seat 51 and the valve hole 45 is opened due to the angular displacement of the portion 53 of the operating lever 10 in the arrow B direction, the connection hole 46a is formed. Since the flow path resistance of 18 is large, the valve hole 4
The suction force from the outlet side conduit 19 is compensated by the atmosphere flowing in from 5, and the suction force is blocked to the inlet side conduit 18 and the gas suction hole 17. You may make it use the switching valve V1 as such an atmosphere release means.

[0022]

According to the first aspect of the present invention, the suction force from the gas sensor is generated by the angular displacement operation of the operating lever in the ventilation path connecting the gas suction hole formed near the tip of the fueling nozzle and the gas sensor. Since the suction force blocking means for blocking the oil supply hose is provided, even if the fuel oil in the fuel supply hose is discharged by the contracting force of the fuel supply hose by angularly operating the operation lever before the oil type is determined, The vaporized gas of the discharged fuel oil is not sucked through the gas suction hole, and thus it is possible to reliably prevent accidentally refueling fuel oil of different oil types.

According to the second aspect of the present invention, the ventilation path connecting the gas suction hole formed near the tip of the fueling nozzle and the gas sensor is linked to the operating lever to open the ventilation path on the gas sensor side to the atmosphere. Since the means for opening is provided, even if fuel oil in the refueling hose is discharged by the contracting force of the refueling hose by angularly operating the operating lever before the type of oil is discriminated, ventilation on the gas sensor side is performed. The path is corrected by the atmosphere, and the vaporized gas of the discharged fuel oil is not sucked from the gas suction hole, which reliably prevents accidentally refueling fuel oil of different oil types. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an oil supply nozzle 1 according to an embodiment of the present invention.

FIG. 2 is a simplified cross-sectional view showing an overall configuration of an oil supply device 21 including the oil supply nozzle 1 shown in FIG.

FIG. 3 is a cross-sectional view showing a specific configuration of a switching valve V.

FIG. 4 is a flowchart for explaining a refueling operation of refueling device 21.

FIG. 5 is a sectional view showing a specific configuration of a switching valve V1 according to another embodiment of the present invention.

[Explanation of symbols]

 1 Refueling Nozzle 3 Main Body 4 Oil Path 5 Discharge Pipe 7 Valve Body 10 Operating Lever 14 Refueling Hose 16 Tip 17 Gas Suction Hole 18 Inlet Pipe 19 Outlet Pipe 21 Lubrication Device 25 Pump 29 Flow Pulse Transmitter 31 Gas Sensor 31 Nozzle case 33 Nozzle detection switch 34 Control means 36 Oil type determination means V, V1 switching valve s1 Flow rate pulse signal s2 Nozzle detection signal s3 Oil type detection signal s4 Motor control signal s5 Display control signal s6 Air supply signal s7 Suction signal

Claims (2)

[Claims] 1. A flexible and elastic refueling hose connects a pump for pumping fuel oil to a refueling nozzle, so that gas sucked from a gas suction hole formed near the tip of the refueling nozzle It guides the gas sensor through the ventilation path to identify the oil type, and when this oil type matches the oil type of the fuel oil, the fuel oil is pressure-fed to the oil supply nozzle via the oil supply hose and the operation lever is angularly displaced. In an erroneous oil supply prevention device for an oil supply device that discharges the fuel oil by operation, suction force cutoff means that cuts off the suction force to the gas suction hole in conjunction with the operation lever is interposed in the ventilation path. An erroneous oil supply prevention device for an oil supply device. 2. A flexible and elastic refueling hose connects a pump for pumping fuel oil and a refueling nozzle, and the gas sucked from a gas suction hole formed near the tip of the refueling nozzle is connected to the pump. It guides the gas sensor through the ventilation path to identify the oil type, and when this oil type matches the oil type of the fuel oil, the fuel oil is pressure-fed to the oil supply nozzle via the oil supply hose and the operation lever is angularly displaced. In the erroneous oil supply prevention device for an oil supply device that discharges the fuel oil by operating, an air release means for opening the air passage on the gas sensor side to the atmosphere in interlocking with the operation lever is interposed in the air passage. An erroneous lubrication prevention device for the characteristic lubrication device.