JPH09315498A - Automatic tank filling-up oil feed nozzle of oil feed device having oil kind discriminating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the discharge flow rate of the fuel oil by sharing a flow passage to be connected to an opening of a nozzle tip part to operate an oil kind discriminating means and an automatic valve closing mechanism. SOLUTION: A switching valve 20 which is connected to an opening 7 through a piping 8, and in which the opening 7 is connected to a gas sensor 11 for discriminating the oil kind in a condition where no liquid pressure is applied from an oil feed hose 4, or the opening 7 is connected to an automatic valve closing mechanism A in a condition where the oil pressure is applied from the oil feed hose 4. Before the oil feed is started, no oil pressure from a fuel pump 35 is applied to the switching valve, and the vapor can be sucked from the opening 7 of a nozzle tip part to the gas sensor 11. When the oil feed is started, the liquid pressure is applied to the switching valve 20, the opening 7 is connected to the automatic valve closing mechanism A to detect the filling-up of oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling device for discriminating the type of fuel oil based on the concentration of vapor accumulated in a fuel tank of an automobile, and detects a full tank and automatically stops refueling. Refueling nozzle.

[0002]

2. Description of the Related Art Automatically determining fuel oil of a vehicle to prevent refueling of an incompatible oil type, and automatically stopping refueling when the fuel oil of a vehicle is completely filled with fuel oil A fueling device configured to do so has been proposed.
The refueling nozzle used in such a refueling device has a flow path for sucking the vapor of the automobile fuel tank to the nozzle cylinder tip portion to supply the gas to the gas detecting means as seen in, for example, JP-A-6-115598. And a pipeline for transmitting a pressure change when the tank is full to the automatic valve closing mechanism.

[0003]

Therefore, there is a problem in that the effective cross-sectional area of the nozzle barrel tip portion is reduced by the pipes and tubes that form the two pipe lines, and the maximum discharge flow rate is reduced. The present invention has been made in view of the above problems, and an object thereof is to make a pipe line for vapor gas supply and a pipe line for full tank detection common to each other, and to make an effective cross-sectional area of a nozzle cylinder tip portion. Is to provide a refueling nozzle that can be expanded.

[0004]

In order to solve such a problem, in the present invention, a fuel supplied from an oil supply device is received via an oil supply hose, and an oil receiving tank provided at a tip of a nozzle cylinder is provided. In a refueling nozzle having a built-in automatic valve closing mechanism that operates based on the air permeability of the opening that is closed when the tank is full, the refueling nozzle is connected to the opening through a pipe line, and when the hydraulic pressure is not received from the refueling hose, A switching valve is provided for connecting the opening to a gas sensor for determining the type of oil, and for connecting the opening to the automatic valve closing mechanism when the hydraulic pressure is received from the oil supply hose.

[0005]

[Operation] Since the hydraulic pressure from the fuel pump does not act on the switching valve before refueling is started, the vapor can be sucked into the gas sensor from the opening at the tip of the nozzle cylinder, and when refueling is started, the liquid is discharged to the switching valve. The pressure acts to connect the opening to the automatic valve closing mechanism, thereby enabling full tank detection.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 shows an embodiment of a refueling nozzle according to the present invention.
Is roughly divided into a body portion 2 and a nozzle tube tip portion 3, and the body portion 2 is connected to a refueling pump of a refueling device main body via a refueling hose 4, and a main valve opened and closed by a refueling lever 5;
For example, negative pressure generating means B for operating the automatic valve closing mechanism A as shown in Japanese Patent Laid-Open No. 4-6092 is provided. Further, the nozzle barrel tip portion 3 is provided with an opening 7 communicating with a fuel tank of an automobile.

The opening 7 is connected to a switching valve 20 which will be described later via a tube 8 penetrating the nozzle tube tip portion 3 and is switched and connected to an air pump 14 or an automatic valve closing mechanism A.

FIG. 2 shows an embodiment of the switching valve described above. In the figure, reference numeral 21 is a cylinder, and one end in the moving direction of a valve body 22, which will be described later, is connected from the oil supply hose 4 via a tube 10. The valve body 22 is housed so as to form a fluid pressure chamber 23 that receives fluid pressure and a connection chamber 24 that communicates with the tube 8 connected to the opening 7 of the nozzle barrel tip portion 3 at the other end.

When the valve body 22 moves in the circumferential direction to the dead center on the hydraulic chamber 23 side (the state shown in FIG. 2A), the valve body 22 is connected through the first flow path 28. When the first connection port 25 connected to the chamber 24 and the valve body 22 move to the dead point on the side of the connection chamber 24 (the state shown in FIG. 2B), the connection chamber 24
A second connection port 26 that communicates with the first connection port 25 and an atmosphere opening port 27 that connects with the first connection port 25 are formed.

The first connection port 25 is connected to the gas sensor 11 which will be described later via the tube 31, and the second connection port 26.
Is connected to the automatic valve closing mechanism A via a tube 32.

On the other hand, the valve body 22 has a flow path 2 which connects the first and second connection ports 25 and 26 and the atmosphere opening port 27.
8 and 29 are formed, and are constantly urged by a spring 30 so as to be positioned at the dead point on the hydraulic chamber 23 side. This spring 30 defeats the elastic force thereof against the force of the valve body 22 which receives the hydraulic pressure of the hose 4 during refueling, thereby connecting the valve body 22 to the connection chamber 24.
It is set to the extent that it is located to the side.

Returning to FIG. 1, the body 2 is provided with a switching valve 20.
Gas sensor 1 for oil type determination connected to opening 7 via
1, an air pump 1 for intake / exhaust that is connected to the sensor 11 and the intake / exhaust port 12 at the rear via an air filter 13.
4, a micromotor 15 for driving the air pump 14, a sensor control means 16, a judgment reference data storage means 17
The sensor control means 16 sends a timing signal for oil type determination in conjunction with the semiconductor device D constituting the
And a switch 18 for outputting to the refueling device main body.

The gas sensor 11 is a detector that outputs an electric signal in response to a hydrocarbon vapor of gasoline or heavy oil, such as a hydrocarbon-based gas and a hydrocarbon-based gas as disclosed in Japanese Patent Application Laid-Open No. 8-26400. With a polymer film whose thickness changes by swelling depending on the concentration and components of the polymer film and a photoelectric detector that detects changes in the film thickness of the polymer film, and a semiconductor gas detection element housed in the chamber Those that have been used are used.

FIG. 3 shows an embodiment of the flow passage of the oil supply nozzle described above and an oil supply device using the same.
In the figure, reference numeral 35 is an oil supply pump for supplying the fuel oil in the oil storage tank to the above-described oil supply nozzle 1, which is driven by a pump motor 36 and is supplied with a flow meter 38 having a flow rate pulse transmitter 37. The fuel oil is sent to the refueling nozzle 1 by 39.

Reference numeral 40 denotes a control device, which is a weighing machine control means 41.
And an oil type coincidence judging means 42 for judging the kind of oil from the oil supply nozzle 1 and the registered oil kind storing means 43 for pre-registering the oil kind of the oil supply device.

When the nozzle switch 44 is turned on, the H weighing machine control means 41 determines that the oil type information sent from the refueling nozzle 1 matches the registered oil type of the registered oil type storage means 43. The pump motor 36 is operated, the amount of oil supply calculated based on the flow rate pulse from the flow rate pulse transmitter 37 is output to the display unit 45, and when the oil types do not match, the pump motor 36 is not operated and an alarm is issued. It is configured to issue an alarm from 46.

In the figure, reference numeral 49 is a power supply circuit for supplying driving power to the oil supply nozzle 1, which is connected to the nozzle 1 by a cable 19 via an intrinsically safe circuit 48 such as a barrier.

The operation of the apparatus constructed as described below will be described with reference to FIG.
A description will be given based on the flowchart shown in FIG. When the nozzle 1 is removed from the nozzle hook and the nozzle switch 44 is turned on (step a), the weighing machine control device 41 resets the indicator 45 to zero and sends an oil type determination command signal to the fueling nozzle 1
Output to

The oil type judging means 16 supplies electric power from the cable 19 to the air motor 15 to reverse the motor 15 (step S) to send the clean air taken in from the intake / exhaust port 12 to the sensor 11.

By the way, in this case, since the fuel oil is not fed by the refueling pump 35, the valve body 22 of the switching valve 20 is pushed by the spring 30 as shown in FIG. A flow path that connects the sensor 11 to the tube 8 is configured. Therefore, from the air pump 14 to the sensor 1
The air discharged to No. 1 is discharged to the atmosphere through the opening 7 of the nozzle barrel tip 3, and the sensor 11 is scavenged.

Then, when the refueling nozzle 1 is inserted into the fuel tank of the automobile and the refueling lever 5 is pulled, the switch 18 interlocked with this is turned on (step C). The sensor control means 16 causes the motor 15 to rotate in the normal direction, and also supplies operating electric power to the sensor 11 (step d). Air pump 14
By the normal rotation, the vapor in the automobile fuel tank passes from the opening 7 of the nozzle cylinder tip portion 3 through the switching valve 20 to the sensor 11
Sucked into.

The predetermined time T, that is, the time during which the gas sensor 11 can output a signal in response to the vapor concentration, for example, 1
When the second has elapsed (step e), the sensor control means 16 turns off the motor 15 and takes in a signal from the sensor 11 to determine the oil type (step f).

The sensor control means 16 compares with the data stored in the judgment reference data storage means 17 to determine whether it is gasoline (step), light oil (step), or air (step), When the judgment of the oil type is completed, the judgment result is output as an oil type signal (step No., Le, O).

At the stage when the determination of the oil type is completed, the sensor control means 16 drives the motor 15 in the reverse direction (step
W) Air from the intake / exhaust port 12 is supplied to the sensor 11 to scaveng the vapor in the sensor 11. When the scavenging is completed (step C), the power supply to the motor 15 is cut off and the air pump 14 is stopped (step Y).

On the other hand, in the refueling device main body, the oil type coincidence judging means 42 outputs the oil type signal from the nozzle 1 transmitted via the cable 19 and the oil type registered in the registered oil type storing means 43. The result of the comparison is output to the weighing machine control means 41.

When the oil types match, the weighing machine control means 41 actuates the motor 36 to feed the fuel oil by the oil supply pump 35. By sending the fuel oil, the fuel oil flows into the hydraulic chamber 23 of the switching valve 20 through the tube 10, and the switching valve 22 is moved to the connection chamber 24 side against the spring 30, as shown in FIG. As shown, the connection chamber 24 communicates with the second connection port 26. As a result, the automatic valve closing mechanism A communicates with the opening 7 of the nozzle barrel tip portion 3. In this state, the valve body 22 connects the sensor 11 to the atmosphere communication hole 27 via the second flow path 29. Therefore, if the air pump 15 is driven in reverse, the gas sensor 11 can be scavenged during refueling. .

When the nozzle 1 is inserted into the fuel tank of an automobile and fueling is started, the nozzle barrel tip portion 3 has only one flow path connected to the opening 7. The effective area is large and the fuel is discharged at a large flow rate. When the fuel is discharged, a flow rate pulse is output from the flow rate pulse transmitter 37 and the amount of refueling is displayed on the display unit 45.

When refueling progresses to near the fullness of the automobile fuel tank and the opening 7 of the nozzle tube tip portion 3 is sealed by fuel oil or bubbles thereof, the automatic closing which has been communicated with the atmosphere through the switching valve 20 until now. Since the supply of the atmosphere to the valve mechanism A and the negative pressure generating section B is cut off, the negative pressure becomes large and the automatic valve closing mechanism A operates to close the main valve and automatically stop the liquid supply.

When the predetermined amount of oil has been supplied in this way, the nozzle 1 is returned to the nozzle hook and the nozzle switch 4
When 4 is turned off, the weighing machine control means 41 cuts off the power supply to the pump motor 36 and stops the oil supply pump 35. As a result, the hydraulic pressure of the fuel supply hose 4 decreases, so that the hydraulic pressure of the liquid chamber 23 of the switching valve 20 also decreases and the valve element 22 is pushed back to the spring 30. As shown in FIG. Is communicated with the sensor 11 so that the scavenging air of the sensor 11 and the vapor of the vehicle fuel tank can be taken in at the beginning of the next refueling.

In the above embodiments, the gas sensor and the pump for vapor intake / exhaust are provided in the nozzle, but the gas sensor and the sampling pump are installed in the main body of the fueling device. If there is something
It is obvious that the same effect can be obtained even if a tube is connected to the first connection port of the switching valve and drawn into the main body of the fuel supply device.

[0031]

As described above, in the present invention,
Refueling with a built-in automatic valve closing mechanism that receives the fuel sent from the refueling device via the refueling hose and operates based on the air permeability of the opening where the tank to be refueled provided at the tip of the nozzle cylinder is closed when the tank is full In the nozzle, connect to the opening through a pipe line, connect the opening to a gas sensor for oil type determination when the hydraulic pressure is not received from the refueling hose, and connect the opening when the hydraulic pressure is received from the refueling hose. Since it is equipped with a switching valve for connecting the automatic valve closing mechanism to the automatic valve closing mechanism, it is possible to use the opening of the nozzle barrel tip for suctioning vapor and detecting fullness by providing only one flow path communicating with the opening in the nozzle barrel tip. Therefore, it is possible to prevent the effective cross-sectional area of the nozzle cylinder tip from decreasing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal structure of an embodiment of an oil supply nozzle of the present invention with a part cut away.

2 (a) and 2 (b) are views showing an embodiment of a switching valve for a nozzle, respectively, in a state where it is connected to a sensor and a state where it is connected to an automatic valve closing mechanism.

FIG. 3 is a configuration diagram showing an embodiment of an oil supply device using the oil supply nozzle of the present invention.

FIG. 4 is a flow chart showing an operation of determining an oil type of the above apparatus.

[Explanation of symbols]

 1 Refueling nozzle 4 Refueling hose 5 Refueling lever 11 Gas sensor 14 Air pump 15 Motor 19 Cable 18 Lever switch 20 Switching valve A Automatic valve closing mechanism B Negative pressure generating part

Claims (5)

[Claims] 1. An automatic valve closing system that receives fuel sent from an oil supply device through an oil supply hose, and operates based on the air permeability of an opening that is closed when an oil supply tank provided at the tip of a nozzle cylinder is full. In a refueling nozzle having a built-in mechanism, while being connected to the opening via a pipe line, the opening is connected to a gas sensor for determining an oil type when the hydraulic pressure is not received from the refueling hose. An automatic full tank refueling nozzle of a refueling device having an oil type discriminating function, which is provided with a switching valve that connects the opening to the automatic valve closing mechanism when receiving hydraulic pressure. 2. A valve body, wherein the switching valve has a flow path that connects the opening to one of the gas sensor and the automatic valve closing mechanism, and a hydraulic pressure for receiving a hydraulic pressure from the refueling hose. A cylinder divided by the valve body into a chamber and a connection chamber connected to the opening, and a spring for urging the valve body to a dead point on the hydraulic pressure chamber side when not receiving the hydraulic pressure. The automatic full tank refueling nozzle of the refueling device having the oil type discriminating function according to claim 1. 3. The oil type discriminating function according to claim 2, wherein the valve body is provided with a flow path for communicating the gas sensor with the atmosphere when the opening is connected to the automatic valve closing mechanism. Automatic full tank refueling nozzle for refueling equipment. 4. An automatic full tank refueling nozzle for a refueling device having an oil type discriminating function according to claim 1, further comprising a pump for sucking vapor of the refueled tank and the gas sensor. 5. An automatic full tank refueling nozzle for a refueling device having an oil type discriminating function according to claim 1, wherein a pump for sucking vapor of the refueled tank is provided in the refueling device.