JPH0152275B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a refueling device.

In conventional refueling devices, when the refueling nozzle is removed from the nozzle hook, refueling is possible, and then the nozzle is inserted into the vehicle's refueling port and refueling is performed by operating the valve provided on the refueling nozzle. There is.

However, in such conventional refueling devices, refueling may be started by operating the nozzle valve without the refueling nozzle being inserted into the refueling port of the vehicle, and oil such as gasoline may be spilled on the floor. In addition, there is a danger of fire due to the generation of static electricity, so the fuel filler port must be grounded while refueling.

For example, in Japanese Utility Model Publication No. 51-20891, a contact piece connected to the positive side of a car battery is brought into contact with a contact piece provided at the tip of the nozzle to cause battery current to flow, and the current directly activates a relay. A technique has been disclosed for detecting the insertion of a nozzle by activating the nozzle. However, this known technique uses a car battery, so it requires work such as connection, and the voltage is high, so there is a risk of sparks caused by connection or contact. There is a risk of occurrence.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fuel supply device that can be used with a power source provided on the fuel supply device side, has no risk of fire, and can be refueled by inserting a fuel nozzle.

According to the present invention, a pump driven by a motor, a flow meter for measuring the amount of oil supplied, a conductive nozzle connected to the flow meter via a hose, and a display of the amount of oil supplied measured by the flow meter are provided. A lubrication system that includes an indicator, a nozzle switch that outputs an on/off signal in conjunction with the nozzle on/off, a conductor placed along the hose connected to the nozzle, and a control circuit that outputs a drive signal to the motor. In the device, the conductor is branched, and one of the conductors is connected to a power source through a resistor and a current detection means, a barrier unit that controls the current and voltage to a low level, and a switch that is closed by a nozzle removal signal, and the other is connected to a power source that controls the current. Grounded through a contact that is closed by the detection signal of the detection means,
A drive signal is output from the control circuit to the motor based on a detection signal from the current detection means.

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

Figure 1 shows a refueling system in which the present invention is implemented, and oil stored in an underground tank T is stored in a case C of the refueling system.
Pump 18 driven by motor 17 installed inside
The fuel is pumped up by the pump and sent to the fuel supply nozzle 1 via a flow meter 19. In the illustrated state, the refueling nozzle 1 is hung on the nozzle hook 22, and with the refueling nozzle 1 hooked on the nozzle hook 22, the nozzle hook switch 2 is turned off. The flow meter 19 is provided with a pulse transmitter 20, and a pulse signal from the pulse transmitter 20 is sent to a control circuit 21, in which the refueling operation is controlled in a manner described later. . The amount of refueling is then displayed on the display meter 4.

Now, in FIG. 2, when the refueling nozzle 1 is removed from the nozzle hook 22, the nozzle hook switch 2 is turned on, the counter circuit 3 is reset by the signal, and the display meter 4 returns to zero. Further, the signal from the switch 2 is transmitted to the switch 23 of the nozzle insertion detection circuit 5 to close it, and the circuit 5 becomes operational.

A conducting wire 7 (FIG. 3), which serves as both a signal line and a ground wire, is provided along the refueling hose 6 and is connected to the refueling nozzle 1.

The aforementioned nozzle insertion detection circuit 5 will be described in detail with reference to FIG. Upon receiving the signal from the circuit 5, the signal is sent to a motor control circuit 16 to drive the motor 17.

Next, the operation of the present invention will be explained with reference to FIG.

Insert the refueling nozzle 1 into the refueling port of the automobile M.
The automobile M has a specific resistance value, and when the refueling nozzle 1 is inserted into the refueling port of the automobile M, the transistor 8
The base of is grounded through the car M, and the bus B
A current flows from the collector to the base of the transistor 8, and then to the nozzle 1 via the resistor 9a, and eventually a small current flows from the automobile M to the ground. Then, a current flows from the collector of the transistor 8 to the emitter, and since there is a relatively large resistor 9b, the current flows to the amplifier 10, and the current flows to the amplifier 10.
The output signal of the amplifier 10 turns on the switch circuit 11. Then, current flows through the relay 12, its contact 13 closes, and the conductor 7 is grounded, acting as a ground.

The output signal of the amplifier 10 is sent to the barrier unit 14.
As a result, as described above, a motor-on signal is transmitted from the AND circuit 15 to the motor control circuit 16, which starts the motor 17 and causes the pump 18 to pump oil from the underground tank.

Open the refueling nozzle to refuel, and check the amount of refueling by checking the flow meter 1.
9, the pulse signal from the pulse transmitter 20 of the flow meter is transmitted to the counting circuit 3, and the display meter 4 displays the amount of oil supplied.

During refueling, the automobile M is grounded by the conductor 7 as described above, to prevent the risk of flame generation due to static electricity.

When refueling is finished and the refueling nozzle is hung on the nozzle hook, the signal from nozzle hook switch 2 disappears.
The signal to the nozzle insertion detection circuit 5 disappears, and its switch 23 is turned off. This allows relay 12
is turned off, its contact 13 is opened, the AND circuit 15 is also turned off, the motor 17 is stopped, and the pump 1 is turned off.
8 stops.

As explained above, according to the present invention, when the refueling nozzle is inserted into the refueling port of a car, the refueling device automatically becomes ready for refueling, and after that, the car is grounded, making it safer than conventional refueling devices. In addition, refueling can be carried out efficiently.

In particular, according to the present invention, one conductor acts as a signal line to detect that the refueling nozzle has been inserted into the refueling port, and also functions as a ground wire for removing static electricity after insertion, so one conductor is connected to the nozzle hose. This is extremely suitable because only a few conductive wires need to be passed through the refueling hose, and there are fewer conductive wires along the refueling hose. In addition, since the current flowing through the nozzle is controlled to be small and the voltage is low, there is no spark that would be generated when the nozzle comes into contact with the vehicle body, making it safe.

[Brief explanation of drawings]

FIG. 1 is a front view of a refueling device embodying the present invention;
FIG. 2 is a circuit diagram of a refueling device embodying the present invention, and FIG. 3 is a circuit diagram of a nozzle insertion detection circuit embodying the present invention. 1...Refueling nozzle, 2...Nozzle hanging switch, 3...Counting circuit, 4...Display meter, 5...Nozzle insertion detection circuit, 6...Hose, 7...Conductor, 8
...Transistor, 9a, 9b...Resistor, 10...
...Amplifier, 11...Switch, 12...Relay,
13... Relay contact, 14... Barrier unit, 15... AND circuit, 16... Motor control circuit, 17... Motor, 18... Pump, 19...
Flowmeter, 20...Pulse transmitter.

Claims (1)

[Claims] 1 A pump driven by a motor, a flow meter that measures the amount of oil supplied, a conductive nozzle connected to the flow meter via a hose, a display meter that displays the amount of oil supplied measured by the flow meter, and a nozzle. In a refueling device that includes a nozzle switch that outputs an on/off signal in conjunction with the on/off of the nozzle, a conductor disposed along a hose connected to the nozzle, and a control circuit that outputs a drive signal to the motor, the conductor is branched, and one of the conductors is connected to a power source through a resistor, a current detection means, a barrier unit that controls the current and voltage to a low level, and a switch that is closed by a nozzle removal signal, and the other is connected to the current detection means. A refueling device characterized in that it is grounded via a contact that closes in response to a signal, and that a drive signal is output from a control circuit to a motor based on a detection signal from a current detection means.