JPH0764384B2 - Refueling device - Google Patents

Description

Description: “Industrial field of use” The present invention relates to an oil supply device for supplying gasoline to a fuel tank of an automobile in a full tank.

"Prior Art and Its Problems" Generally, an oil supply device for supplying a fuel such as gasoline to a fuel tank of an automobile can automatically perform full tank oil supply.

In such a refueling device, an insertion sensor that detects that the refueling nozzle has been inserted in the fuel tank, a bubble sensor that detects bubbles on the liquid surface that occurs during refueling, and the liquid level in the tank is at the tip of the nozzle. If a bubble sensor detects a bubble on the liquid surface, the refueling is temporarily interrupted to wait until the bubble disappears, and then the bubble disappears. After refueling is restarted later, interruption and resumption of refueling based on the detection result of such a bubble sensor are repeated until the liquid level is detected by the liquid sensor so that full tank refueling is performed. It is sequence controlled.

By the way, in such a feed bag refueling device, during refueling, for example, when a malfunction occurs in one of the liquid level sensors and the sequencer does not operate normally, the refueling nozzle is inserted through the refueling port of the tank. There is a problem that gasoline may overflow, and the liquid level sways with refueling, so that only detection with a large error can be performed.

On the other hand, an oil supply device for supplying compressed air to the inside of an oil supply tank to a constant pressure before refueling and calculating the amount of oil that can be supplied into the tank from the amount of air supply required at this time is disclosed in Japanese Patent Application Laid-Open No. No. 58-99399. According to such a feedforward refueling device,
It is possible to set the refueling amount as a preset value to fill the tank in advance and perform preset refueling, but in order to check this preset value, a device such as an air source consisting of a compressor must be newly provided. was there. Further, in such a feed-forward refueling device, there is a problem that the refueling time becomes long because the actual refueling, that is, the oil cannot be discharged from the refueling nozzle until the preset value is checked. .

"Means for Solving Problems" The present invention has been made in view of the above circumstances, and determines a preset value for filling the tank while actually refueling, and further sets this value. By performing preset refueling based on this, it is possible to prevent accidents such as overflow, and to obtain a refueling device that shortens refueling time. In order to achieve this purpose, supply oil to the tank. The oil supply means, the oil supply amount detection means provided in the oil supply means for detecting the amount of oil supplied to the tank, the sealing means for holding the inside of the tank in a sealed state, and the pressure in the tank. A pressure sensor for detecting and a calculation means for calculating the amount of oil that can be refueled in the tank are provided based on the amount of change in the detection value of the pressure sensor for a certain period of time and the detection value of the oil supply amount detection means. There is.

[Operation] According to the present invention, since the inside of the tank is held in a sealed state by the sealing means, as fuel is supplied,
The pressure in the tank rises. Further, at this time, the amount of oil that can be refueled in the tank can be calculated from the amount of change in the detected value of the pressure sensor and the detected value of the oil supply amount detection means during a certain period of time. It can be performed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In these figures, FIG. 1 is a view showing a state in which the fuel supply means 1 is attached in close contact with a fuel tank 2 of an automobile, and FIG. 2 is a view showing a schematic configuration of the fuel supply means 1.

As shown in FIGS. 1 and 2, the refueling means 1 is a hose 3 connected to an underground tank (not shown) to which fuel such as gasoline is supplied, and a refueling attached to the tip of the hose 3. It is composed of a nozzle body 4 and a nozzle pipe 5 which is provided on the fuel supply nozzle body 4 and jets gasoline from the tip thereof. In the middle of the hose 3, fuel such as gasoline is pumped up from an underground tank. A pump 6, a flow meter (fuel supply amount detection means) 7 for measuring the flow rate of fuel in the hose 3, and a valve 8 for adjusting the flow rate of fuel flowing through the hose 3 are sequentially arranged in the moving direction of fuel. It is provided.

The refueling means 1 is detachably attached to a mouthpiece 9 provided at a refueling port 2a of the fuel tank 2. The attachment means 10 for attaching the oil supply means 1 to the mouthpiece 9 will be described. In the middle of the nozzle pipe 5, a lid 11 having a U-shaped cross section with its plate surface oriented in a direction orthogonal to the axis of the nozzle pipe 5. Is fixed. As shown in FIGS. 1 and 2, the lid body 11 is adapted to be fitted with the mouthpiece 9, and a packing 12 for sealing between the lid body 11 and the mouthpiece 9 is provided on the lower surface thereof. A compression spring 13 for pressing the lid 11 against the base 9 is provided on the upper surface thereof. This compression spring 13 has one end fixed to a spring receiver 14 on the lid 11 and the other end fixed to a fulcrum indicated by reference numeral 12, and the lid 11 is fitted to the base 9. By pressing the fulcrum 15 in the direction of arrow A, the nozzle pipe 5 is fixed in the combustion tank 2.

The lid 11, the packing 12, the compression spring 13, and the spring receiver 14 constitute a sealing means.

Further, the lid 11 is provided with a depressurizing pipe 16 for adjusting the pressure in the fuel tank 2. This pressure relief pipe 16
Is a pre-opener 17 which is opened at a certain pressure or higher, and when the lid 11 is fitted into the base 9, one end thereof is arranged in the fuel tank 2 and the other end is external. It is supposed to be placed in.

On the other hand, a liquid level sensor 20, a chucking state detection switch 21, and a pressure sensor, which are provided at the tip of the nozzle pipe 5, between the lid 11 and the spring receiver 14, and between the nozzle pipe 5 and the pressure relief pipe 16, respectively. 22 and the control circuit 23 for adjusting the opening of the valve 8 by the output signals from the liquid level sensor 20, the chucking state detection switch 21, and the pressure sensor 22.

The liquid level sensor 20 is an ultrasonic sensor including a transmitter and a receiver, and based on the time difference between the time when the ultrasonic wave is transmitted and the time when the ultrasonic wave is received after being reflected by the liquid surface. The control circuit 23 calculates the distance between the tip of the nozzle pipe 5 and the liquid surface.

The chucking state detection switch 21 detects whether or not the spring pressure of the compression spring 13 is applied to the lid body 11, and is set to ON when the spring pressure of the compression spring 13 is applied. OFF when the spring pressure of spring 13 is not applied
Is set to. Then, only when the chucking state detection switch 21 is ON, the control circuit 23
Outputs a signal for setting the valve 8 to open.

The pressure sensor 22 detects the pressure in the fuel tank 2 when refueling work is started, and the output signal thereof is output from the liquid level sensor 20 and the chucking state detection switch 21 together with the control circuit 23. To be supplied to. On the other hand, an output signal from the flow meter 7 is supplied to the control circuit 23, and the output signal from the flow meter 7, the pressure sensor 22 and the like causes the fuel tank 2 to be supplied.
The amount of oil that can be supplied before the tank is full, that is, the allowable amount of oil supply is calculated, and based on this calculation result, the control operation of the pump 6 and the valve 8 is performed until the tank 2 is full. ing.

Next, a method of producing the amount of refueling of the fuel tank 2 in the arithmetic circuit 23 will be described.

First, P ₀ (pressure value of the pressure when the total volume of the fuel tank 2 V _0, the liquid volume that has already been stored in the fuel tank 2 V _L, the amount of liquid V _L to the fuel tank 2 is stored Detected by the sensor 22).

Then, when refueling is started and the V _Q amount of fuel is supplied (detected by the flow meter 7), the pressure value in the fuel tank 2 is set to P ₁ (detected by the pressure sensor 22), and the fuel is calculated to be obtained. The allowable oil supply amount (V ₀ −V _L ) of the tank 2 is given by the following formula.

P ₀ · (V ₀ −V _L ) = P ₁ · (V ₀ −V _L −V _Q ) ... (1) From this equation (1), the following equation (2) is derived.

That is, the allowable oil supply amount based on the equation (2) is the detection value P ₀ of the pressure sensor 22 when the nozzle pipe 5 is chucked in the fuel tank 2 (assumed to be t ₁ ), and a certain time has elapsed from t ₁ time. It is derived from the detected value P ₁ of the pressure sensor 22 at the subsequent time t ₂ and the oil supply amount V _Q performed within the fixed time (between t _{1 and} t ₂ ).

Therefore, in the oil supply device configured as described above,
From the pressure change in the fuel tank 2 and the refueling amount in a fixed time (t _{1 to} t ₂ hours), the allowable refueling amount can be easily calculated by the formula (2), and further, based on the calculation result. , The amount of refueling can be preset. And
According to such preset refueling, the allowable refueling amount can be calculated during refueling, so that preset refueling can be performed without manual labor, and since the tank 2 is sealed, high speed (high (Flow rate) Refueling is also possible, and therefore refueling in a short time is possible.

Further, since the allowable oil supply amount can be calculated from the pressure change in the fuel tank 2 and the amount of oil supply during that time in a certain period of time, in order to calculate the allowable oil supply amount, a compressor or the like such as a conventional oil supply device can be used. It is not necessary to newly install an air source, and this brings about an effect that the function can be improved while preventing the apparatus from becoming large.

On the other hand, even if the pressure sensor 22 fails and the oil supply amount cannot be preset correctly, the liquid level sensor 20 detects that the tank 2 is full (nozzle). Since it is detected that the distance between the tip of the pipe 5 and the liquid surface has become 0), it is possible to prevent overflow as a result. That is, double safety is ensured by both the liquid level sensor 20 and the pressure sensor 22.

Further, when the allowable amount of refueling is small and the pressure in the fuel tank 2 rises above the set value, the tank 2 is fed through the bleeder 17.
Since the air inside escapes to the outside, the safety can be improved in this respect as well.

Further, since the nozzle pipe 5 is attached to the mouthpiece 9 in a close contact state, the nozzle pipe 5 can be detached even if, for example, a worker's foot is caught on the hose 3. Instead, the external leakage of gasoline can be prevented.

By setting t ₁ at the start of refueling, the allowable refueling amount can be calculated immediately before the start of refueling. Further, based on the allowable oil supply amount obtained by the above calculation, the flow velocity is slowed down before a certain amount (for example, just before the tank 2 is filled up), and the oil level sensor 20 detects that the oil supply is stopped. By doing so, a safe system is built without worrying about overflow. Furthermore, although the allowable oil supply amount (V ₀ −V _L ) is calculated from the above formula (2), the oil supply amount V _Q
From this, the rate of pressure change at that time (for example, P ₁ / P ₀ ) may be obtained.

Furthermore, the nozzle pipe 5 does not have to be in close contact with the fuel filler port 2a at all times, and the nozzle pipe 5 may be closely fitted only while the preset value is being calculated. That is, since the airtight holding inside the tank 2 is performed to calculate the preset value, even if the chucking state detection switch 21 is turned off after the preset refueling is started, the valve 8 is closed. It is not necessary to put it in the state, so that the nozzle pipe 5 and the fuel filler port can be used only while the preset value is being calculated.
It is good to make it closely contact with 2a.

[Advantages of the Invention] As described in detail above, according to the present invention, the amount of oil that can be refueled in the tank is determined from the amount of change in the detection value of the pressure sensor and the detection value of the refueling amount detection means during a certain period of time. Since the calculation means for calculating is provided, it is possible to perform the preset refueling based on the result of the calculation, and it is possible to shorten the refueling time. Moreover, the preset value can be calculated during refueling. As a result, it is possible to prevent accidents such as an overflow, and to improve safety.

Further, since the amount of oil that can be refueled in the tank can be calculated from the amount of change in the detection value of the pressure sensor and the detection value of the oil supply amount detection means in a certain period of time, in order to calculate the preset value, It is not necessary to newly install an air source such as a compressor unlike the oil supply device, and this brings about an effect that the function can be improved while preventing the device from becoming large.

On the other hand, since the preset value is calculated from the detection value of the pressure sensor and the detection value of the refueling amount detecting means, even if the liquid level shakes during refueling, the preset value is not affected. In other words, there is an effect that it is possible to perform accurate calculation.

[Brief description of drawings]

1 and 2 are views showing an embodiment of the present invention, and FIG. 1 is a front sectional view showing a state in which a fuel supply means is closely attached to a fuel tank 2 of an automobile, and FIG. FIG. 3 is a diagram showing a schematic configuration of a fuel supply means. 1 ... Lubrication means 2 ... Fuel tank 7 ... Flowmeter (lubrication amount detection means) 11 ... Lid 12 ... Packing 13 ... Compression spring 14 ... Spring receiver (11-14 ... Sealing means) 22 ...... Pressure sensor 24 …… Calculation means (control circuit)

Claims (1)

[Claims] 1. A refueling means for refueling oil in a tank, a refueling amount detection means provided in the refueling means for detecting the amount of oil supplied to the tank, and a closed state in the tank. The amount of oil that can be refueled in the tank is calculated from the sealing means that holds the pressure, the pressure sensor that detects the pressure in the tank, the amount of change in the detection value of the pressure sensor for a certain period of time, and the detection value of the refueling amount detection means. And a calculation unit that performs the operation.