JP2855958B2 - Refueling device with oil type discrimination function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device having a function of determining the type of fuel oil based on the concentration of vapor retained in an automobile fuel tank.

[0002]

2. Description of the Related Art Diesel oil and gasoline are used as fuel oil for automobiles. Incorrect refueling of the oil type causes inconvenience to the engine. For this reason, there has been proposed a fueling device in which a suction pump provided in a fueling device main body sucks vapor from a tip end of a fueling nozzle into a gas sensor chamber of the fueling device main body to determine an oil type of an automobile fuel tank. I have. However, in the case where such a gas sensor is provided on the fueling device main body side, a pipe line for drawing in the vapor becomes long, so that the gas sensor is not provided.
In addition to the problem that it takes time for the gas to reach the gas sensor and it takes time to determine the oil type, there is a problem that a pump with a strong suction force is required to suck the vapor. In order to solve such a problem, the present applicant has proposed a refueling device in which a gas sensor chamber is provided on the refueling nozzle side, and a pipe length between the gas suction port and the gas sensor is made as short as possible. According to this, it is possible to shorten the time until the fuel oil determination, and it is possible to use a suction pump having a relatively small suction force.

[0003]

However, when the determination of the oil type is completed and the refueling is started, the air pump is stopped to stop the vapor suction. This is a few seconds from when the lever is removed to when the lever is pulled, which causes inconvenience in that the scavenging of the gas sensor chamber may be incomplete and an error may occur in the oil type determination at the time of the next refueling. . The present invention has been made in view of such a problem, and an object of the present invention is to automatically supply air supplied for vapor suction to a gas sensor chamber at the start of refueling to a gas sensor chamber. An object of the present invention is to provide an oil supply device having an oil type determination function for scavenging a chamber.

[0004]

In the present invention, there is provided a means for eliminating To solve such a problem, only setting the air supply means to the fuel supply apparatus body, also in the fueling Nozzle, negative pressure in communication with the air supply means A gas generating section, a gas sensor chamber connected to the negative pressure generating section, a vapor suction / exhaust port connected to the gas sensor chamber,
A refueling lever for opening and closing the valve, and a
Member connected to the transmission member and the inside of the transmission member and the refueling nozzle
Opening and closing the air opening of the negative pressure generating section by the hydraulic pressure of
A transfer valve is arranged, and the transmission is performed by moving the refueling lever.
The switching valve is opened to the atmosphere of the negative pressure generating unit via a member
Close the mouth and let the air from the air supply
Supply to the gas sensor chamber, and the hydraulic pressure of the refueling nozzle is
The switching valve switches when acting on the switching valve.
On the other hand, while opening the air opening port,
Negative pressure was supplied to the gas sensor chamber.

[0005]

When the refueling is started, the liquid pressure in the refueling nozzle acts on the switching valve, so that the air supplied to the negative pressure generating section is supplied to the gas sensor chamber to scavenge the vapor.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. 1 and 2 show an embodiment of the present invention, in which reference numeral 1 denotes a fueling device main body, and a fueling pump 3 for feeding fuel oil in an underground tank to a fueling nozzle 2 described later. , Flow meter 5 equipped with flow pulse transmitter 4
When, it is configured to include a pump 6 for feeding air to the fuel supply gas sensor chamber 24 of the nozzle 2 and the negative pressure generating unit 40. Reference numeral 7 denotes a control device provided in the refueling device main body 1. The control device 7 converts a signal from the flow rate pulse transmitter 4 into a refueling amount, outputs the refueling amount to a display 8, and outputs a signal from a nozzle switch 10 provided on a nozzle hook 9. Pump motor 11 by the signal of
And the air pump 6 is started and stopped.

[0007] have been previously oil type data registered in the control device 7, gas sensor in the gas sensor chamber 24 to be described later
2 3 actuates the pump motor 11 when the detection signal from the ultrasound transducer in this example coincides with the registered oil seed data, pump motor 1 if they do not match
The alarm device 13 is configured to issue an alarm without activating the device 1.

FIGS. 3 and 4 are cross-sectional views showing one embodiment of a fueling nozzle 2 used in the above-described fueling device. Reference numeral 20 in the figure denotes a main valve 22 which is opened and closed by a fueling lever-21. A gas sensor chamber 24 containing a gas sensor 23 therein, and a refueling lever.
Switching valve 25 linked to 21 and micro switch 5
2 are provided.

The switching valve 25 includes a lever 27 as a transmission member biased by a spring 26 at the tip of the oil supply lever 21.
And an operating rod 28 which is moved from a diaphragm 31 which receives the hydraulic pressure of a main valve chamber 30 by a flow path 29 and is normally urged to one side by a spring 32. This operation rod 28 is valve body 33 is not et provided, negative pressure generator 40 in a state positioned in the drawing the right hand side (state took the position a), in this embodiment
Cuts off the communication between the exhaust port 41 of the ejector and the atmosphere opening port 42 and sends air from the air tube 43 to the gas sensor chamber 24.
In the state (position b) located on the left side in the figure, the exhaust port 41 of the negative pressure generating section 40 communicates with the atmosphere opening port 42, and the negative pressure generated in the negative pressure generating section 40 is detected by the gas sensor. Room 2
4.

Reference numeral 24 denotes the above-mentioned gas sensor chamber, which is formed as a cylindrical body having a constant propagation path length, and accommodates an ultrasonic transducer 23 serving as a gas sensor on one wall surface.
A tube 45 is connected to the negative pressure port 44 of the negative pressure generator 40 at one end.
And a tube 47 at the other end.
The second port communicating with the vapor suction / exhaust port 49 of the cylinder tip 48
The opening 50 is formed.

Reference numeral 52 denotes the above-mentioned microswitch for operating the gas sensor 23 when the refueling lever 21 is pulled up.
When the magnet 53 faces, the sensor drive pulse from the control device 7 is supplied to the gas sensor 23, and an echo signal resulting from the drive pulse is output to the control device 7. The transmission of these signals is performed by a cable 55 that is inserted through the air tube 43 and extends from the fueling apparatus main body 1. The air tube 43 is connected to a hose 5 connecting the flow meter 5 and the fuel nozzle 2.
6 and extended. It should be noted that reference numerals 62 and 6 in FIG.
3 shows a coupling means for inserting the cable 55 into the air tube 43, respectively, the separating means for drawing the air tube 4 3 or al cable 55.

FIG. 5 shows the operation of the apparatus constructed as described below.
A description will be given based on the flowchart shown in FIG. Refueling nozzle 2 is picked up to refuel and nozzle switch 10 is
When it becomes N (step a), the indicator 8 returns to zero, and the air pump 6 starts operating (step b). In the present state, since the refueling lever 21 is still in the position where the main valve 22 is closed, since the exhaust port 41 of the negative pressure generating section 40 is closed by the switching valve 25, the air sent by the air tube 43. From the opening 46 to the gas sensor chamber 2
The vapor which flows into the nozzle 4 and stays there is discharged from the vapor suction / exhaust port 49 of the cylindrical portion 48 of the nozzle 2 to the outside.

In this state, when the nozzle cylinder tip 48 is inserted into the vehicle fuel tank and the fuel supply lever 21 is pulled up, the magnet 53 at the tip of the lever 27 faces the micro switch 52,
At the same time, the operating rod 28 is pushed to the left in the figure. As a result, the micro switch 53 is turned on (step
C) Further, the switching valve 25 moves to the position b, and the exhaust port 41 of the negative pressure generating section 40 is opened to the atmosphere. This allows negative pressure
A negative pressure is generated from the generator 40, and the vapor of the vehicle fuel tank flows into the gas sensor chamber 24 from the vapor suction / exhaust port 49 of the nozzle tip 48.

When the micro switch 52 is turned on, a drive pulse is supplied from the control device 7 to the gas sensor 23 in the gas sensor chamber 24, and the concentration of the vapor is measured based on the propagation time. In this embodiment, the gas sensor 2
An ultrasonic transducer is used as 3 and the vapor concentration is measured by the propagation time of the ultrasonic wave.
Obviously, the measurement can be similarly performed by using a means for measuring the concentration of hydrocarbons, for example, a semiconductor gas sensor.

The signal from the gas sensor 23 is taken into the control device 7 to determine the oil type, and when the fuel in the vehicle fuel tank matches the oil type registered in the fueling device 7 in advance (step d). Then, the pump motor 11 is turned on (step E) to supply the fuel oil to the nozzle 2. The fuel oil flows into the main valve chamber 30 by the supply of the fuel oil, and the hydraulic pressure is changed via the flow passage 29 to the diaphragm 3 of the switching valve 25.
Acts on 1. As a result, the operating rod 28 is pushed back to the position a against the force of the spring 26, and the exhaust port 4 of the negative pressure generating section 40 is
1 is closed, and air flows into the gas sensor chamber 24. As a result, the gas sensor chamber 24 is scavenged by air during refueling.

When a predetermined amount of refueling is completed, the refueling lever 21 is pulled down, and the nozzle 2 is set on the nozzle hook 9 so that the nozzle switch 10 is turned off (step f), the power supply to the pump motor 11 is stopped. Then, the supply of the fuel oil is stopped, and the hydraulic pressure of the main valve chamber 30 decreases. Then, when a predetermined time, for example, 5 seconds, has elapsed since the pump motor 11 was stopped, the air pump 6 is stopped and the scavenging is ended (step S1).

On the other hand, if the oil type determination in the above step (d) does not output a determination result indicating that the oil type matches even after a lapse of a predetermined time T2, for example, 2 seconds (step nu),
"Return the nozzle to the nozzle hook and check the oil type."
Is notified by the alarm 13 (step
Le). When the nozzle 2 is returned to the nozzle hook 9 by this notification and the nozzle switch 10 is turned off (step
E), the operation of the alarm 13 stops. Next, the air tubes 45 and 47 and the vapor of the gas sensor chamber 24 are scavenged until a predetermined time T1 has elapsed from the time when the nozzle switch 10 is turned off (steps S and T).

Also, when the oil type is different when the nozzle 2 is removed from the nozzle hook 9, or when the oil type is noticed during the oil type determination, as shown in FIG. The nozzle 2 is returned to the nozzle holder 9 and the nozzle switch 10
Is turned off (steps 4 and 5), the air pump 6 is operated for a predetermined time T1 from this point, and the air tube is turned off.
Scavenging of the gas sensor chambers 45 and 47 and the gas sensor chamber 24 is performed (step). When the predetermined time T1 has elapsed, the air pump 6 is stopped (step 1).

[0019]

As described above, in the present invention,
Provided the air supply means to the fuel supply apparatus body, also fueling Nozzle
The, a negative pressure generator which communicates with the air supply means, a gas sensor chamber which is connected to the negative pressure generating unit, connected to the gas sensor chamber
Vapor intake / exhaust port, oil supply lever to open / close the main valve, and oil supply
A transmission member connected to the lever via a spring, and a transmission member
And the air opening of the negative pressure generating part due to the liquid pressure in the refueling nozzle
A switching valve that opens and closes the valve, and by moving the refueling lever
The switching valve opens the air opening of the negative pressure generator through the transmission member.
Close and use air from the air supply
To the chamber, and the oil pressure of the refueling nozzle acts on the switching valve.
The switching valve switches and opens the air opening
In both cases, supply the negative pressure of the negative pressure generator to the gas sensor chamber.
The refueling nozzle was raised by raising the refueling lever.
Supplying negative pressure to the sensor chamber shortens the time until fuel oil judgment
Not only can it be shrunk,
When pressure is applied, there is no need to operate the lubrication lever
Scavenging by automatically supplying air to the gas sensor chamber
Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of an apparatus showing one embodiment of the present invention.

FIG. 2 is a diagram showing an outline of a refueling device to which the present invention is applied.

FIG. 3 is a cross-sectional view showing one embodiment of a refueling nozzle used in the same device.

FIG. 4 is a cross-sectional view showing one embodiment of an oil supply nozzle used in the same device.

FIG. 5 is a flowchart showing an operation of the above device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Refueling device main body 2 Refueling nozzle 3 Refueling pump 5 Flowmeter 6 Air pump 10 Nozzle switch 11 Pump motor 22 Main valve 24 Gas sensor chamber 25 Switching valve 31 Diaphragm 40 Negative pressure generating part 49 Vapor suction / exhaust port 52 Micro switch

Claims (1)

(57) [Claims] 1. A set of air supply means to the fuel supply device main body,
Also the filling nozzle, a negative pressure generator which communicates with the air supply means, a gas sensor chamber which is connected to said cathode pressure generating portion, the gas
Open and close the vapor intake / exhaust port connected to the sensor chamber and the main valve
A refueling lever connected to the refueling lever via a spring
With the transmission member and the hydraulic pressure in the transmission member and the oil supply nozzle
A switching valve for opening and closing the atmosphere opening port of the negative pressure generator is arranged
Then, the movement of the refueling lever allows the
The switching valve closes the air opening of the negative pressure generating section and
Then, the air from the air supply means is supplied to the gas sensor chamber.
And the hydraulic pressure of the refueling nozzle acts on the switching valve.
If used, the switching valve switches to open the atmosphere.
Open the outlet and reduce the negative pressure of the negative pressure
Oil supply device with oil type discrimination function to supply to the sensor room .