JPS6294589A - Liquid feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid supply device for doubling the supply of foaming liquid such as gasoline, and is particularly suitable for use in automatic replenishment. Regarding equipment.

[Prior art]

Generally, when refueling a vehicle with gasoline using a gasoline refueling device or the like, so-called full tank refueling is often performed, in which the fuel tank is refilled until it is full. For this reason, a liquid level sensor is installed in the refueling nozzle, and when the liquid level sensor is activated, the pump and solenoid valve stop operating due to the automatic valve closing mechanism attached to the refueling nozzle or a signal from the liquid level sensor. It is configured to do this.

However, since gasoline is a foaming liquid, foam regulation during refueling tends to occur, and the liquid level sensor is activated by the foam, which may cause refueling to be stopped before the tank is actually full. For this reason, the reality is that workers at gas stations manually refill additional fuel, which has the drawback of requiring time and effort to refuel.

In order to improve such drawbacks, a conventional oil supply device is proposed, for example, as shown in Japanese Patent Application Laid-Open No. 58-30993, after the liquid level sensor comes into contact with liquid or foam and the oil supply is stopped. , an arithmetic circuit that determines whether the amount or time of previous refueling has reached a predetermined reference value to be considered full refueling, and the bubbles necessary to restart refueling once refueling has stopped. and a timer set with a predetermined time In that is longer than the disappearance waiting time, and after the predetermined time set by the timer has elapsed, until the arithmetic circuit determines that the refueling amount or refueling time has become below a predetermined reference value. A device configured to repeatedly restart and stop refueling is known.

[The dark problem that the invention attempts to solve]

However, in the prior art described above, a timer is used to set a predetermined time longer than the actual bubble disappearance waiting time.
After the time set by the timer has elapsed, additional refueling is restarted to achieve a substantially full refueling, which causes the following problems. That is, the foam extinguishing time differs depending on various external factors such as the previous refueling time, the amount of refueling, the type of liquid, and the structure of the refueling nozzle. especially.

During normal refueling until the liquid level sensor first detects that the tank is full, a large amount of oil flows over a long period of time, so foaming is most common during this period. Even during normal refueling, the tank capacity varies depending on the vehicle, and the amount of bubbles generated is not constant.Also, even during one full tank refueling operation, additional refueling after normal refueling requires a small flow of oil. The liquid level sensor is activated and the oil supply is stopped even if the liquid flows for a short period of time, so there is less foaming. Despite this, the conventional technology assumes a predetermined time longer than the longest bubble disappearance wait time and uniformly sets the predetermined time using a timer, so the liquid supply time is extremely long. There was a problem that the workability was poor.

The present invention was developed in view of the problems of the prior art, and the time from when the liquid/foam sensor is activated and the liquid supply stops until the liquid supply is restarted is calculated based on the previous liquid supply mode, For example, it is an object of the present invention to provide a liquid supply device that can perform calculations based on the liquid supply amount, liquid supply time, liquid type, etc., and can always perform a full liquid supply in a minimum amount of time.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is based on the input of the full tank preliminary detection signal, and detects the state of liquid supply before the full tank preliminary detection signal is input. The bubble disappearing time is calculated from the ball, and the liquid feeding control means consisting of a pump or a solenoid valve is stopped in operation only during the calculated bubble disappearing time.

〔Example〕

Hereinafter, the liquid supply device according to the present invention will be described in detail with reference to FIGS. 751 to 6, taking gasoline refueling as an example.

First, in FIG. 1, 1 indicates a fixed oil supply device, and the oil supply device 1 includes a main body 2 and a main body 2. A fixed pipe 3 provided inside the tank and having one end connected to an underground tank (not shown), and the fixed pipe 3
a pump 5 provided midway and driven by a pump motor 4; a flow meter 7 provided with a flow rate pulse transmitter 6; and a refueling nozzle 9 provided at the other end of the fixed pipe 3 via a hose 8. , a liquid/foam sensor 10 provided on the tip 9A of the refueling nozzle 9, a nozzle storage section 11 provided on the side wall of the main body 2 for hooking and unhooking the refueling nozzle 9, and a nozzle storage section 11 provided in the nozzle storage section 11. A nozzle switch 12 that outputs an open signal when the refueling nozzle 9 is applied and a closing signal when the refueling nozzle 9 is removed, and a refueling amount indicator 13 that displays the amount of refueling.
It has the specific configuration shown in FIG. 2, and is roughly composed of a control device 14 connected to each of them via a signal line. Here, the liquid bubble sensor 10 detects when the liquid level or bubble level in the fuel tank reaches a predetermined position and outputs a detection signal.For example, an ultrasonic sensor, a photoelectric sensor, A capacitive sensor or the like is used.

Next, FIG. 2 shows a specific configuration of the control type 2114 in FIG. Display drive circuit 1 that drives each digit of the display 13
6 and a processing circuit 17 consisting of a microcomputer or the like. The processing circuit 17 includes a CPU 1B that performs arithmetic processing, a ROM 19 storing programs shown in FIGS. 4 and 5, a RAM 20 having a configuration shown in FIG.
5. An I10 circuit 21 that inputs and outputs signals to the display drive circuit 16, nozzle switch 12, and liquid number bubble sensor 10, a system bus 22 that connects these, and a CPU.
an oscillator 23 connected to 18 and oscillating clock pulses;
The flow rate pulse generator 6 includes a waveform shaping circuit (
(not shown) is directly connected to the CPU 18.

Furthermore, FIG. 3 shows a specific configuration of the storage area realized in the RAM 20. 1 Data table I stores the foam disappearance waiting time during normal refueling and the foam disappearing waiting time during additional refueling. Data table ■, motor ON timer t-, foam extinguishing 1 Terama timer t4, foam disappearance waiting time setting area t11. and a refueling flag area KFLG.

Here, in the data table r, the driving time of the pump motor 4 based on the first place in seconds (see) and the corresponding foam disappearance waiting time tauD are stored as El, t2+, . . . That is, the data table (2) shows that the pump 5 is driven at a steady flow rate from when the refueling nozzle 9 is inserted into the fuel tank until the liquid/foam sensor 10 is activated for the first time (hereinafter referred to as "normal refueling"). This shows the relationship between the operating time of the pump 5 and the bubble disappearance waiting time when The values will be different.

On the other hand, in the data table (2), the driving time of the pump motor 4 in milliseconds (msec) and the corresponding bubble disappearance waiting time taup are stored as ΔtI, Δt2, . . . . That is, pump 5 is used for additional oil supply.
This shows the relationship between the driving time of the pump 5 and the bubble disappearance waiting time when the pump 5 is driven for a minute time, and this relationship is also a value actually measured in advance.

Furthermore, the motor ON timer t counts clock pulses while the pump motor 4 is driving, and measures the time ts. The bubble disappearance time timer ta is the liquid fist bubble sensor l.
Count clock pulses after O outputs a detection signal,
This is to measure the bubble disappearance time t4. For the foam disappearance waiting time setting area taup, access the pump drive time column of data table E or H from the motor ON time by motor ON timer L-, and set the foam disappearance wait time taup corresponding to the motor ON time (pump drive time). t,,t2
, . . . or Δtl lΔt2 , . Furthermore, refueling flag area K
Since the conditions for bubble generation are different between normal refueling and additional refueling, FLG sets the flag "O" during normal refueling and rlJ during additional refueling.

The present embodiment is constructed as described above, and its operation will now be described with reference to FIGS. 4 to 6.

First, in order to refuel a vehicle parked near the fixed refueling bag 221, when the refueling nozzle 9 is removed from the nozzle housing 11,
A closing signal is output from the nozzle switch 12, and the refueling operation starts (step St). By inputting this closing signal to the processing circuit 17, under the control of the CPU 18, the motor ON timer ts in the RAM 20 and the bubble disappearing rIJ
1 timer td is reset to zero, the refueling flag KFLG in the refueling flag area KFLG is cleared to "0", and a flag indicating the normal refueling state is set (step S2). Further, the pump motor 4 is activated via the pump motor drive circuit 15, and the previously displayed value in the oil supply amount display 13 is reset to zero via the display drive circuit 16. The next step S3 is a waiting loop to check whether the refueling nozzle has been opened and actual refueling work has started, and depending on whether or not the measured value of the flow rate pulse by the flow rate pulse interrupt processing is zero, step S3 is executed. A confirmation is made. The above is the pretreatment before starting refueling.

Now, when the creator x inserts the fuel nozzle 9 into the fuel tank and opens the valve, the oil in the underground tank flows through the fixed pipe 3 and the pump
, is discharged from the refueling nozzle 9 via the flow meter 7 and the hose 8, and an 8 m pulse is transmitted from the flow pulse transmitter 6.
Counting of the amount of oil supplied is started by the flow rate pulse interrupt process, and this counted value is displayed on the amount display 13 of oil supplied.

When the start of refueling is confirmed in this way (step S
3), in the next step S4, motor ON timer 1. starts measuring time using clock pulses. Then, the liquid bubble sensor IO checks whether the liquid level or bubble level in the fuel tank has risen and turned ON (step S
5).

When refueling progresses and the liquid/foam sensor 10 turns ON, the detection signal is input to the processing circuit 17, and the CPU 18 stops driving the pump motor 4 (step S6) and stops counting the motor ON timer t-. (step S7),
The amount of refueling during this period, including the amount for the predetermined travel, is Ql, and the amount of motor 708 hours counted during this period is tl (see FIG. 6). The above is the normal refueling operation.

In this way, once the normal refueling is finished.

In the next step S8, the CPU 18 determines whether or not full tank refueling has been completed.The method for this determination is as follows: 1) The drive time of the pump motor 4 (motor 708 time ta) is set to a predetermined time (for example, 0.5 seconds). ), ■Whether the detection signal from the liquid bubble sensor lO is smaller than a predetermined time (for example, 2
This is done based on whether the output continues (for more than 2 seconds), ■Whether the amount of refueling at the time of additional refueling is less than a predetermined amount (for example, 0.1 liters), or by combining each of the above methods. .

Here, if it is confirmed in the judgment operation of step S8 that the tank is refueled at full capacity, or if the refueling nozzle 9 is closed on the way even if the tank is not refueled at full capacity, the refueling nozzle 9 is closed. The input of the closing signal from the nozzle switch 12, which is output by pulling it out from the fuel tank and hanging it on the nozzle storage part 11, is confirmed (step 514).
), as a result, the drive of the pump motor 4 is stopped and the refueling is completed (step 515).

Now, when it is determined in the determination operation in step S8 that the tank is not full, the bubble disappearance waiting time taup is calculated in the next step S9. This calculation means is carried out in accordance with the flowchart shown in FIG.

That is, the refueling flag KFLG is "0" in step 5ILO.
Check whether it is. Refueling flag KFLG is r
ol, the current lubrication operation is determined to be normal lubrication, and the data table is accessed to check the motor O.
From the mode 708 time t1 measured by the N timer t-, the corresponding bubble disappearance waiting time taup is set as t,,t
2,... and set it in the bubble disappearance waiting time setting area taup (step S111)
. When this setting is completed, the refueling flag KFLG is set to rlJ, and a flag indicating that the next refueling operation will be additional refueling is set (step S112). On the other hand, in the determination at step 5IIO, the refueling flag KFLG is set to rlJ.
If so, it is determined that the refueling operation performed this time is additional refueling, the data table (■) is accessed, and the motor ON timer t11 is set to 708 hours tm2+ta3.・・・
・From this, the bubble disappearance waiting time taup corresponding to this is Δt
l.

Select from Δt2, ... and set it in the bubble disappearance waiting time setting area taup (Step 2 S113
).

By the way, in the above-mentioned explanation of steps 5l-S8, since it is normal refueling, the foam disappearance waiting time taup corresponding to Mo708 time tel from the data table T is set in the foam disappearance waiting time setting area t61. is set to When this setting is completed, the foam extinguishing time timer ta starts counting clock pulses and measures the foam extinguishing time (step 5IO).

In the next step Sll, it is determined whether the measured time tal of the foam extinguishing time timer ta is greater than the set foam disappearance waiting time t, Iup, and a foam disappearance signal is transmitted when tag>tau. .

By sending the bubble disappearance signal, it is assumed that the bubbles in the fuel tank have disappeared, and the measured values of the motor ON timer ts and the bubble disappearance time timer ta are reset to zero (step 5).
12) At the same time, a pump motor drive signal is output from the CPU 18, the pump motor 4 is restarted, and the process returns to step S4 (step 513).

In this way, the operations of steps 54 to S8 are repeated, and the first
By the second additional refueling, the refueling amount Q2 is refilled, and the motor ON timer ts measures the motor 708 time t12 during this time (see FIG. 6). Then, when it is determined in step S8 that the full tank refueling has not been completed, the bubble disappearance waiting time taup corresponding to the mode 708 hours Es2 is determined to be Δtl and Δt2 from the data table II.
, ... is selected and set in the bubble disappearance waiting time setting area taup (see step 5113). At this time, since the motor ON time t112 is short and there is little foaming, A short foam extinguishing time is set. After completing this setting, step SIO~5
13 is repeated again, the oil supply amount Q2 is refilled, and the process returns to step S4.

Furthermore, the same additional refueling operation as described above is repeated, and the refueling amount Q3. Q4 is refueled, and after the third [1 additional refueling operation is completed, it is determined in step S8 that, for example, the refueling amount Q4 is less than or equal to a predetermined refueling amount (for example, 0.1 sentence). It will be completely refueled.

As a result, refueling ends via step SL4.

As described above, in this embodiment, the pump driving time including the flow rate, oil supply amount, and oil supply time before manual operation of the full tank preliminary detection signal is taken as an example as a factor, and the shortest bubble disappearance waiting time is used as an example. Since the fuel tank can be selected as the fuel tank, refueling work can be done quickly. Further, each of the data tables I and II can be set according to various conditions such as flow rate, liquid type, model, etc., and can be set to values that suit the installation conditions of the oil supply device.

In the embodiment, normal lubrication and additional lubrication are started and stopped by starting and stopping the pump motor 4, but a solenoid valve is provided in the middle of the fixed piping 3, and the opening and closing operations of the solenoid valve You can do it. In this case, the pump motor 4 is started and the solenoid valve is opened by the closing signal from the nozzle switch 12, and step S6 is set to "open solenoid valve", and step S13 is set to "closed solenoid valve".

In addition, although the foam extinguishing time timer t was described as starting counting at the rise of the detection signal from the liquid/foam sensor 10, as shown by the dotted line in FIG. Counting starts at the falling edge of the signal, and the measurement time t'
al, L'a2, . . . may be measured. In this case, the full tank refueling operation becomes even more reliable.

Furthermore, the pump motor 4 is used as a means for determining the oil supply state.
Although the drive time of the oil supply nozzle 9 is taken as an example, the amount of oil supplied and the flow rate before that time may be measured individually and each may be used as a factor, or the opening time of the oil supply nozzle 9 may be used as a factor.

〔Effect of the invention〕

The liquid supply device of the present invention is as described in detail above, and calculates the foam disappearance time (foam disappearance waiting time) from the liquid supply state before the full tank pre-detection signal is inputted manually, and operates the liquid supply control means only during this time. Because of this structure, it is possible to shorten the refueling time when refueling to a full tank and efficiently perform the liquid refilling operation.

[Brief explanation of drawings]

Figure 1 is an overall configuration diagram of the oil supply system used in this example, Figure 2
FIG. 3 is a circuit diagram showing the specific configuration of the control device in FIG. 1, FIG. 3 is an explanatory diagram showing the internal configuration of the RAM in FIG. 2, and FIG. 4 is a flowchart showing the liquid supply operation. Figure 5 is a flowchart showing the calculation operation of the bubble disappearance waiting time;
The figure is a time chart showing a series of liquid supply operations. 1... Fixed oil supply device, 4... Pump motor, 5...
...Pump, 6...Flow rate pulse transmitter, 7...Flow meter, 8...Hose, 9...Refueling nozzle, 10...
Liquid/foam sensor, 12... Nozzle switch, 13...
Oil supply amount indicator, 14... Control device, 17... Processing circuit, 18... CPU, 19... ROM, 20...
RAM, I, II...Data table. Patent issued, 1iij'i person Tokico Co., Ltd. agent
Patent attorney: Kazu Hirose Personal information: Naoki Nakamura Figure 1 Figure 3

Claims (1)

[Claims] Based on the input of the full tank pre-detection signal, the bubble disappearing time is calculated from the liquid supply state before the full tank preliminary detection signal is input, and the liquid feeding control means comprises a pump or a solenoid valve only during the calculated bubble disappearing time. A liquid supply device configured to stop operating.