JPS6311235B2 - - Google Patents

Description

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

Currently, there are two types of refueling devices: (1) those that have a function (preset function) that allows the customer to preset the amount of refueling specified by the customer (preset) and automatically stop refueling when the set amount of refueling is reached; A device that has a function that can automatically stop refueling accurately at a whole amount of refueling by performing a refueling stop notice operation near the refueling amount (exact stop function), and has both functions (1) and (2) above. Some are known to have both.

By the way, in such a refueling device, after stopping the refueling at the preset amount or exactly the stop amount,
There are times when it is desired to perform additional refueling, but with conventional equipment, the refueling nozzle must be returned to the nozzle case for additional refueling, which is not only inconvenient but also
This is also inconvenient because returning the nozzle causes the refueling amount counter to return to zero.

In view of the above points, the present invention provides the following features:
During a certain period of time (for example, about 3 seconds), the nozzle lever (operating lever for a nozzle built-in valve or refueling start/stop and flow rate control lever for a nozzle without a built-in valve)
As long as the valve is closed or the nozzle is returned to the refueling stop position, refueling can be resumed at any time after the predetermined period of time has elapsed without having to return the nozzle to the nozzle case.

That is, the refueling device of the present invention includes a refueling nozzle having a built-in valve, and a level that changes from a first level to a second level when the refueling nozzle is moved from a non-refueling position to a refueling position, and a refueling nozzle that moves from the refueling position to the refueling position. a nozzle switch that outputs a nozzle signal that changes from the second level to the first level when the nozzle is returned to the non-refueling position; a pump that sends oil to the oil supply nozzle via an oil supply path; and a drive motor for the pump. a flow meter provided in the oil feed path; a transmitter that transmits flow pulses corresponding to the amount of oil measured by the flow meter; a counting circuit that counts the flow pulses; and a display that displays the amount of oil measured. and a circuit that generates a refueling stop signal when the refueling amount reaches a preset value or when the refueling amount reaches a value without a fraction exactly after a stop notice operation; The motor is energized by the change from the second level to the first level, the motor is deenergized by the change from the second level to the first level of the nozzle signal, and the refueling nozzle is de-energized after the motor is energized. A determination command signal e is generated during the time _T1 normally required for movement and insertion from the position to the refueling port, and the motor is rotated at a low speed during the time _T1 , and when the refueling stop signal is received, the motor is turned off. After deenergizing, the refueling nozzle is removed from one refueling port, the built-in valve of this refueling nozzle is closed, and the time _T2 normally required for inserting this refueling nozzle into another refueling port is elapsed. a motor control circuit that restarts the motor, generates the signal e for the time _T1 after the restart, and rotates the motor at a low speed for the time _T1 ; and the refueling nozzle while the determination command signal e is being input. When a number of flow pulses from the pulse transmitter exceeds the number of flow pulses corresponding to the amount of oil flowing through the flowmeter due to expansion of the hose connected to the oil supply nozzle despite the closure of the built-in valve of the oil supply nozzle. , and a determination circuit that provides a motor stop signal C to the motor control circuit.

Embodiments of the present invention will be described in detail below with reference to the drawings. In the following, the case where a preset amount of lubrication is performed is called preset lubrication, the case where the target lubrication amount is stopped accurately is called exactly stop lubrication, and the case where lubrication is performed exactly at a stop after preset lubrication is called preset/exactly stop lubrication.

In FIG. 1, 1 is a housing of a ground-mounted oil supply system, and 2 is an oil feed pump, which is driven by a motor 20 and pumps up oil from an underground oil storage tank (not shown) through a pumping pipe 4 and an oil feed path 5. send to Reference numeral 6 denotes a flow meter interposed in the oil feed path 5, which measures the amount of oil fed, and its output is input to the flow rate pulse transmitter 22.
8 is a refueling hose, and 9 is a refueling nozzle attached to the tip of the refueling hose 8.

Reference numeral 10 denotes a control section, an example of which has a circuit configuration as shown in FIG. 2, and performs the operations described below.
26 is a display.

Reference numeral 12 represents a preset keyboard, and 13 represents a nozzle case provided in the refueling device housing 1, in which the refueling nozzle 9 is housed.When the refueling nozzle 9 is removed (moved from the non-refueling position to the refueling position), the nozzle switch 14 is activated. The output (nozzle signal) rises from low level L to high level H, and when the nozzle is returned to the nozzle case (returns from the refueling position to the non-refueling position), the nozzle signal falls from H to L.

When the nozzle signal falls (H→L) (that is, when the nozzle is returned to the nozzle case after refueling), the preset circuit 15, arithmetic circuit 16, and determination circuit 17 shown in FIG. 2 are reset.

When the nozzle 9 is removed from the nozzle case 13, the counting circuit 18 is activated by the rise of the nozzle signal (L→H).
is reset, and the pump motor 20 is energized via the motor control circuit 19. motor 2
0 rotates at low speed for a predetermined short time T ₁ after energization (usually within the time required to remove the nozzle from the nozzle case and insert it into the refueling port, for example, about 1 second), and thereafter. Perform high speed rotation. Time _T1 is determined by counting clock pulses from clock pulse generator 21 within motor control circuit 19.

The motor control circuit 19 controls the rising edge (L) of the nozzle signal.
→H), a judgment command signal e (hereinafter simply referred to as signal e) is applied to the judgment circuit 17 only during the above-mentioned time _T1 , and the circuit 17 is caused to perform a judgment operation to be described later.

A flow rate pulse corresponding to the amount of oil measured by the flowmeter 6 as the motor 20 rotates is provided from the flow rate pulse transmitter 22 to the determination circuit 17, the counting circuit 18, and the oil supply stop notice operation detection circuit 23.

The determination circuit 17 determines the number of pulses (flow rate pulses corresponding to the amount of oil flowing through the flow meter 6 due to the expansion of the hose 8) preset by the reference setting circuit 24 during the time _T1 during which the signal e is input. When a number of flow rate pulses equal to or greater than 1) are given from the pulse transmitter 22, oil is in a state where oil can be discharged from the nozzle tip before the nozzle tip is inserted into the oil receiving port (in the embodiment, the nozzle The built-in valve is open) and the motor stops signal C (hereinafter simply referred to as signal C).
is applied to the motor control circuit 19 to stop the motor 20. In this case, when the nozzle is returned to the nozzle case, the determination circuit 17 is reset by the fall (H→L) of the nozzle signal, and the signal C disappears.

If T ₁ hour elapses without signal C being generated,
The signal e disappears, but in this case, the oil is not in a state where it can be discharged from the tip of the nozzle (in the embodiment, the built-in valve of the nozzle is closed), so the motor control circuit 19
increases the rotational speed of the motor 20 to perform high-speed rotation.

Therefore, when the built-in valve (not shown) of the nozzle 9 is opened to supply oil, a flow pulse corresponding to the amount of oil supplied is given from the flow pulse generator 22 to the counting circuit 18, and the value counted by the counting circuit 18 (the amount of oil supplied) is It is displayed on the display 26 via the display drive circuit 25.

For example, when performing so-called "full tank" refueling, when the nozzle's automatic stop mechanism (so-called auto-stop mechanism) is activated and refueling is stopped, in most cases the refueling amount is indicated by a fraction of 1/10 liter, for example. Moreover, even if the tank is said to be "full," there is usually still some room left in the refueling tank, so additional refueling is performed to reduce the above-mentioned fraction of the refueling amount to zero (if the tank has just stopped) refueling) is desirable.

To make a stop exactly, for example, change the refueling flow rate by rapidly operating the nozzle's built-in valve opening/closing lever several times.The cycle of the flow rate pulse changes, so this change can be detected by detecting the stop notice operation. The circuit 23 detects a detection signal f (hereinafter simply referred to as signal f) (1
pulses) are applied to the discrimination circuit 27.

After receiving the signal f, the discrimination circuit 27 converts the counting circuit 1
8 count value (lubrication amount) is a predetermined value (for example, 1/
When the count value in the 10 liter digit reaches 8 = 0.8 liters, a deceleration rotation signal (one pulse) b' is given to the motor control circuit 19 to decelerate the motor 20 and perform lubrication with a small flow rate. , When the amount of oil supplied in the counting circuit 18 reaches another predetermined value (for example, when the count value in the 1/10 liter digit is 0, that is, when the count value in the 1 liter digit increases by 1), the system stops. A signal (one pulse) b (hereinafter simply referred to as signal D) is applied to the motor control circuit 19 to stop the motor 20. Therefore, refueling stopped when the count value of the 1/10 liter digit was exactly 0 (that is, there was no fraction less than 1 liter). signal b
The discrimination circuit 27 is automatically reset by the output.

In the case of preset refueling, the refueling amount entered on the keyboard 12 (for example, 20 liters) is stored in the arithmetic circuit 16 via the preset circuit 15.
When refueling is performed, the refueling amount (flow rate pulse transmitter 2
2) is subtracted from the preset amount of the calculation circuit 16, and when the subtraction result (remaining amount to be refueled) becomes a constant value (for example, 0.2 liters),
The arithmetic circuit 16 supplies a decelerated rotation signal a' to the motor control circuit 19 to cause the motor 20 to rotate at a decelerated rate to supply oil at a small flow rate, and eventually the calculation result of the arithmetic circuit 16 is changed to another constant value (for example, 0.0 liters, That is, when the preset amount of oil supply is completed, a stop signal (one pulse) a is given to the motor control circuit 19 to stop the motor 20.

In either case of just-stop lubrication and preset lubrication, the motor control circuit 19 restarts the motor 20 when a certain period of time T ₂ (for example, 3 seconds) has elapsed after the motor 20 was stopped. time
T ₂ is determined by counting the clock pulses from the clock pulse generator 21 within the motor control circuit 19. This time _T2 is variable. Return the nozzle operating lever to the built-in valve closing position or refueling stop position within this time _T2 . In addition, at time T ₂ , after refueling is completed, the nozzle is removed from one refueling port, the nozzle operating lever is operated to close the built-in valve or return to the refueling stop position, and then the nozzle is inserted into the next refueling port. be chosen to be long enough to carry out the work.

When the motor 20 is started after the time T ₂ has elapsed, the motor rotates at a low speed during the time T ₁ (approximately 1 second), and then rotates at a high speed after the elapse of the time T ₁ .

If the nozzle operating lever is not returned to the above-mentioned built-in valve closing or refueling stop position during the time _T2 before the motor 20 is restarted, the nozzle is in a state where oil can be discharged. After ₂ hours have elapsed, the motor control circuit 19 energizes the motor 20 and generates a signal e, and similarly to the case described above, within T ₁ hour, the determination circuit 17 determines that oil can be discharged from the nozzle. A signal C is generated to stop the motor.

Figure 3 is a time chart showing the above-mentioned just-stop refueling operation, and Figure 4 is an operation that combines preset refueling and just-stop refueling (for example, after presetting 20 liters of refueling into a carrying can, the car is filled up).
This is a time chart showing the timing (when refueling), and the rotation speed (rpm) of the pump motor 20 is shown at the top of the vertical axis.
The lower row shows the amount of oil discharged from the nozzles (Q), and the horizontal axis shows time t. T ₁ and T ₂ indicate the above-mentioned times.

The alphabetical letters below in the figure indicate the time points at which each operation is performed.

A: Remove the nozzle from the nozzle case (start the pump) B: Pull the nozzle operating lever (start refueling) C: Activate the nozzle automatic stop mechanism (stop refueling) (Fig. 3) C': Complete the preset amount of refueling ( Refueling stop) (4th
(Fig.) D: Pull the nozzle operating lever (additional refueling starts) E: Pull the nozzle operating lever several times in succession (refueling stop warning action) F: Refuel when the digit of 1/10 liter of refueling amount reaches 0 G: Pump restart H: Pull the nozzle operating lever as necessary (refueling resumes) The nozzle operating lever should be moved between C' and G and F and G to close the built-in valve. Otherwise, it is necessary to return it to the refueling stop position. Otherwise, even if the pump is restarted at time G, the motor will be stopped.

If the nozzle is returned to the nozzle case between C' and G and F and G, the pump will not be restarted. If the nozzle is returned to the nozzle case after restarting, the pump will stop.

The pump can be stopped and restarted many times until the nozzle is returned to the nozzle case.

In the above explanation, the flow velocity (flow rate) is controlled by changing the rotation speed of the pump motor, but there are other methods besides this, such as using a large flow solenoid valve in the flow path 5 and a bypass flow of this valve. It is also possible to provide a small flow solenoid valve in the passageway and control the opening and closing of both valves.

In addition, when the preset amount of refueling is completed or when refueling is automatically stopped due to the operation of the nozzle's auto-stop mechanism, when the motor moves from low speed to high speed rotation, or when a refueling stop notice operation is performed, these conditions Means to notify (lamp,
A buzzer, etc.) may be provided.

As described above, according to the present invention, even if lubrication is stopped, lubrication is automatically enabled again, so it is not necessary to return the nozzle to the nozzle case each time or to attach special means (a switch for restarting lubrication). This simplifies the additional lubrication operation as there is no need to operate this, and even if the nozzle is not inserted into the refueling port while the nozzle is still able to discharge oil when additional lubrication starts, lubrication is automatically stopped. It is safe.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a refueling device according to an embodiment of the present invention, Fig. 2 is a block diagram showing details of the control section shown in Fig. 1, and Figs. 3 and 4 are time charts for explaining the operation. . 2... Pump, 6... Flow meter, 12... Keyboard, 14... Nozzle switch, 15... Preset circuit, 16... Arithmetic circuit, 17... Judgment circuit, 18... Counting circuit, 19... Pump Motor control circuit, 20...Pump motor, 21...Clock pulse transmitter, 22...Flow rate pulse transmitter, 2
3... Just-stop notice operation detection circuit, 24... Reference setting circuit, 25... Display drive circuit, 26... Display, 27... Judgment circuit.

Claims (1)

[Scope of Claims] 1. A refueling nozzle having a built-in valve, which changes from a first level to a second level when the refueling nozzle is moved from a non-refueling position to a refueling position, and which moves the refueling nozzle from a refueling position to a non-refueling position. a nozzle switch that outputs a nozzle signal that changes from the second level to the first level when returned to the position; a pump that feeds oil to the oil supply nozzle via an oil feed path; a drive motor for the pump; a flow meter provided in the oil feed path; a transmitter that transmits flow pulses corresponding to the oil amount measured by the flow meter; a counting circuit that counts the flow pulses; and a display that displays the measured oil amount. a circuit that generates a refueling stop signal when the refueling amount reaches a preset value or when the refueling amount reaches a value without a fraction exactly after a stop notice operation; and a first level to a second level of the nozzle signal. energizing the motor by a change in the nozzle signal from a second level to a first level, and deenergizing the motor by a change in the nozzle signal from a second level to a first level; and after energizing the motor, the refueling nozzle is moved from a non-refueling position. A determination command signal e is generated during the time T ₁ normally required for movement and insertion into the refueling port, and the motor is rotated at a low speed during the time T ₁ , and when the refueling stop signal is received, the motor is deenergized. Then, when the time T ₂ normally required for pulling out the refueling nozzle from one refueling port, closing the built-in valve of this refueling nozzle, and inserting this refueling nozzle into another refueling port has elapsed, the motor is turned off. a motor control circuit that restarts the motor, generates the signal e for the time _T1 after the restart, and rotates the motor at a low speed during the time _T1 ; When the motor receives a number of flow pulses from the pulse transmitter that exceeds the number of flow pulses corresponding to the amount of oil flowing through the flowmeter due to expansion of the hose connected to this oil supply nozzle despite the closure of the valve, the motor A refueling device comprising: a determination circuit that provides a stop signal C to the motor control circuit.