JPS61190494A - Lubrication system - 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] [Field of Industrial Application] The present invention relates to a lubrication system using a lubrication device with a preset lubrication function, and particularly to a change in lubrication mode between preset lubrication and normal lubrication. The present invention relates to a refueling method that corrects the amount of error that occurs due to the refueling process, and enables accurate refueling regardless of the refueling mode.

[Prior art]

Generally, the refueling device with preset function.

A pump installed in the middle of a pipe that connects one end to a tank,
a flow meter, a refueling nozzle connected to the other end of the piping via a hose, a flow transmitter attached to the flow meter and outputting a flow signal corresponding to the amount of refueling measured by the flow meter; A display device that displays the amount of oil to be supplied based on a flow rate signal from a flow rate transmitter, a preset switch that presets the amount of oil to be supplied at the time of preset lubrication, and a refueling unit that starts refueling when the amount of oil to be supplied by the refueling nozzle reaches the preset amount by the preset switch. A pump motor attached to the pump, a solenoid valve provided in the middle of the piping, or the like is used as the oil supply stop means.

During normal refueling, refueling is started and stopped by opening and closing the refueling nozzle, and during preset refueling, refueling is started by opening the refueling nozzle.
Stopping lubrication means stopping the pump motor that drives the pump,
Alternatively, this may be done by a refueling stop means such as closing a solenoid valve provided in the middle of the piping, and the refueling nozzle is closed after the preset refueling is completed. Therefore, during preset lubrication, even if the lubrication stop means stops, the main valve of the lubrication nozzle remains open, so only the automatic valve stops the oil from flowing out. Compared to the end of refueling (when the main valve is closed), the amount of oil in the hose that expands will flow into the vehicle's fuel tank. It varies depending on the location and time of refueling, but it is usually around 1,1-0,5 JL. For example, if the previous time was preset refueling and this time is normal refueling,
There is a possibility that a minute error may occur each time the refueling mode differs.

[Problem that the invention seeks to solve]

This is shown in Figure 7. In the case of normal refueling both last time and this time as shown in Figure 7 (a), the amount displayed on the display meter is the amount from the opening to the closing of the refueling nozzle. and the actual amount of oil supplied. Against this.

As shown in Figure 7(a), if the previous time was preset lubrication and the current time is normal lubrication, the amount of oil required to fill the hose by driving the pump is counted before opening the fuel nozzle. Therefore, the actual amount of oil supplied from when the oil supply nozzle opens until it closes is reduced by this amount. On the other hand, as shown in FIG. 7(c), if preset oiling is used both last time and this time, the oil filling the hose will flow out again, so the displayed value and the actual oiling amount will match. Furthermore, the seventh
If the last time was normal lubrication and the current one is preset lubrication, as shown in Figure (d), even if the liquid supply stop means is activated, extra oil will be supplied by the amount of oil that has flowed out of the hose.

The present invention has been made in view of the problems with the conventional method described above. When preset lubrication is completed, oil equivalent to the oil that has flowed out from inside the hose with the oil supply nozzle closed is poured into the hose in advance. This filling amount is stored as a correction amount, and when the next time is normal lubrication, the lubrication process is carried out in the same way as the previous time, and the first time or To provide a refueling system in which a correction amount stored in advance is subtracted from a preset amount when performing preset refueling after that, and correction is performed to match a displayed value with an actual refueling amount.

[Means for solving problems]

In order to solve the above-mentioned problems, the features of the configuration adopted by the present invention are: an oil filling means that fills the hose with oil after the end of preset oil supply; , a correction amount storage means that counts the flow rate signal output from the flow rate transmitter and stores it as a correction amount; and at the next preset refueling, the correction amount stored in the correction amount storage means is read out and the preset amount is set by the preset means. and a preset amount correction means for performing subtraction correction, and the refueling stop means is configured to operate when the amount of refueling reaches the preset amount corrected by the preset amount correcting means.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case in which the oil supply system of the present invention is applied to a fixed type oil supply device will be described in detail based on an embodiment shown in the drawings.

1 to 5 show a first embodiment of the present invention, and in this embodiment, a solenoid valve consisting of a main solenoid valve and a sub-solenoid valve is used as the refueling stop means.

In FIG. 1, the fixed oil supply system N1 has a lower case 2,
A pipe 4 is provided in the lower case 2, one end of which is connected to a tank (not shown), and a pump driven by a pump drive motor 5 is installed in the middle of the pipe 4. 6. A solenoid valve 8 consisting of a flow meter 7 for measuring the amount of oil supplied, a main solenoid valve 8A for large flow that opens and closes as described later, and a sub solenoid valve 8B for small flow is provided, and the flow meter 7 is attached with a flow rate transmitter 9 that transmits a flow rate signal proportional to the measured flow rate. A hose IO is connected to the other end of the pipe 4, and a refueling nozzle 11 is attached to the tip of the hose 10, and the refueling nozzle 11 is stored in a nozzle storage M12 except during refueling work. The nozzle storage section 12 is provided with a switch 13 that is closed by removing the refueling nozzle ti and opened by hooking the nozzle storage section 12. When the switch 13 is closed, the motor 5 is driven. At the same time, the electromagnetic valve 8 is opened, and the remoter 5 is configured to stop when the solenoid valve 8 is opened.

On the other hand, a display section 14 is formed on the front of the upper case 3,
The display unit 14 includes an amount display 15, a refueling amount display 16,
A unit price display 17 is provided. Also, upper case 3
A preset switch 18 constituting a preset means is provided on the side surface of the preset switch 18, and the preset switch 18 includes, for example, quantitative switches 18A and 18B for presetting 101, 151, 201, 301, and 40fL.

18c, 18D, and 18E are provided. Further, inside the upper case 3, there is a unit price setting device 19 for setting the amount per unit flow rate, that is, a unit price, and a control circuit 20 detailed in FIG.
is built-in. Note that the preset switch 1
Each quantitative switch 18A to 18E constituting 8 indicates the amount of refueling instead of the amount of refueling, for example, 1,000 yen, 1,500 yen, 2,00 yen, 3,
000 yen.

It may also be a fixed amount switch that presets 4,000 yen, and the presetting means is a dial type preset switch instead of a push button type preset switch.

It may be a ten-key set preset switch, or it may be a card-type preset means that presets by inserting a card into a card league.On the other hand, the preset means may be provided at an appropriate location such as in an office or an outdoor card reader box. It is something that can be done.

Next, FIG. 2 shows a specific circuit diagram of the control circuit 20, and the control circuit 20 is a CPU:i? Processing device 21. A ROM 22 that stores the programs shown in FIGS. 3 and 4, and an FIAM 23 that stores preset amounts, actual oil supply amounts, correction amounts, etc. to be described later under the control of the processing device W21.
, a display control circuit 24 that controls each display 15 to 17 of the display unit 14 and displays the amount of oil supplied, etc., an input/output circuit 25,
The motor 5. is provided on the output side of the input/output circuit 25 and is controlled by the processing device 21. It is generally composed of a motor drive circuit 26, a solenoid valve control circuit 27, etc., which control the solenoid valves 8A and 8B, respectively. The processing device 21 and the ROM 22
．． The RAM 23, display control circuit 24, input/output circuit 25, etc. are interconnected via a data bus 28. Further, the flow rate transmitter 9 is connected to the interrupt input int of the processing device 21, and the amount of oil supplied is counted based on the flowchart shown in FIG. Further, the nozzle switch 13 and the preset switch 18 are connected to the input side of the input/output circuit 25, and the processing circuit 2
1, the signal is read.

The present embodiment is constructed as described above, and its operation will now be described.

First, the normal refueling operation without using the preset switch 18 will be described.

First, when the refueling nozzle 11 is removed from the nozzle storage part 12,
The nozzle switch 13 is closed, and this closing signal is read by the processing unit [21] via the input/output circuit 25. As a result, the motor drive circuit 26 is
A motor start signal is outputted to start the motor 5, and a valve opening signal is outputted to the solenoid valve control circuit 27 to open each solenoid valve 8A, 8B. In addition, R from the processing device i21
By outputting a reset signal to the refueling counting area PCOUNT in AM23 and resetting the counting area PCOUNT, each display 15 is
．． The previous displayed value displayed at 16 is reset to zero.

In this state.

When the refueling nozzle 11 is inserted into the vehicle's fuel tank and the valve is opened, the oil from the tank flows through the pipe 4, pump 6, flow meter 7,
Solenoid valve 8. It is discharged from the refueling nozzle 11 via the hose IO. The flow rate at this time is measured by the flowmeter 7, and the flow rate signal from the flow rate transmitter 9 is input to the processing device 21.
The processing device 21 is a refueling counting area PC in the FIAM 23.
OUNT is counted by the interrupt processing shown in steps 325 to 27 in FIG. Rear display drive circuit (
(not shown), the integrated value is displayed on each display 15, 16 moment by moment.

Then, when the desired amount of oil is reached, the oil supply nozzle 11 is stored in the nozzle storage section 12 and the nozzle switch 13 is opened. As a result, the opening signal is read by the processing device 21, which outputs a motor stop signal to the motor drive circuit 26 to stop the motor 5, and outputs a valve closing signal to the solenoid valve control circuit 27. Each solenoid valve 8A, 8B is closed.

The normal refueling operation is completed through the above steps, but there is no substantial difference in these operations from those according to the prior art.

Next, a preset oil supply operation using the preset switch 18 will be described with reference to FIGS. 3 to 5.

First, prior to refueling work, a preset amount desired by the customer is preset using the preset switch 18 (step S1). At this time, if the value desired by the customer is 20, the amount switch 18c is pushed. As a result, the preset value (PRESET) by the preset switch 18 is set.
) is stored in the preset amount storage area PRESET in the RAM 23 via the input/output circuit 25.

In the next step S2, under the control of the processing device 21,
The previous oil supply amount in the oil supply counting area PCOUNT of the RAM 23 is reset, and the display values of each display 15 and 16 are reset to zero, and the main solenoid valve closing value storage area VI5 is reset.
At TOP, a value (PRESET-) is obtained by reducing a predetermined constant value (CONSTI) from the preset value (PRESET) in the preset amount storage area PRESET.
CONSTI) and set the sub solenoid valve closing value storage area V.
2STOP is set to a value (PRESET-CONST2-ADDPLS) obtained by reducing the constant value (CONST2) from the preset value (PRESET) and the correction value (ADDPLS) stored in the correction amount storage area ADDPLS. Here, the constant value C03TI is determined to be a value suitable for the first stage valve closing, that is, a value up to the second stage valve closing, to improve measurement accuracy, and the other constant value C0N5T
2 is the overflow amount that occurs when the sub-electromagnetic valve 8B is closed, and is normally set to 0.1-0.31 degrees, and the correction value ADDPLS is the overflow amount that occurs when the sub-electromagnetic valve 8B is closed.
Flow rate counted when filling into 0, 0.1 to 0
．． It is about 5 sentences, and the variables are different each time.

Once the preset amount has been set as described above,
Same as in the normal lubrication operation described above.

When the refueling nozzle 11 is removed from the nozzle storage part 12.

The nozzle switch 13 closes, and this closing signal is processed*
Reading is performed by a121. As a result, the processing device 21 outputs a motor start signal to the motor drive circuit 26 to start the motor 5 (step S3).
, a valve opening signal is output to the solenoid valve control circuit 27 to open each of the solenoid valves 8A and 8B (step S4).

In this state, when the fuel nozzle 11 is inserted into the fuel tank and the valve is opened, the oil from the tank is discharged from the fuel nozzle 11. The flow rate at this time is measured by the flow meter 7,
The flow rate signal of the FIL quantity output signal 9 is input to the processing device 21 and counted by the interrupt processing shown in steps 525 to 527 in FIG.
T is added sequentially, and the counting area PCO
The count signal from the UNT is output to the display section 14 via the display control circuit 24, and is integrated and displayed on each display 15, 16.

Next, the processing device 21 enters a refueling counting area PCOUNT and a main solenoid valve closing signal storage area VISTOP.
(step 55) and the amount of oil supplied (PCOUN).
When it is determined that T) has not reached the predetermined value (VISTOP), a waiting loop state is entered in step S6.37, and in step S6, the refueling nozzle 11
If the motor 5 is overloaded, it is determined that the fuel supply has been changed to normal lubrication midway through, and the motor 5 is stopped in step 323. On the other hand, in step S5, the amount of oil supplied (
pcoUNT) has reached the predetermined value (VISTOP), the processing device 1ji21 outputs a main solenoid valve closing signal to the solenoid valve control circuit 27, and closes the main solenoid valve 8A (step S8). As a result, the flow rate flowing through the pipe 4 is reduced from a large flow rate to a small flow rate.

Next, the processing bag W21 has a refueling counting area PCOUNT and a sub solenoid valve closing value storage area V2STOP.
In step S9), the amount of oil supplied (PCOUNT) is monitored.
When it is determined that V2STOP has not reached the predetermined value (V2STOP) i, a waiting loop state is entered with steps sto and stt. On the other hand, the refueling Ik (PCOUNT) is set to a predetermined value (
When it is determined that V2STOP) has been reached, the processing device 21 outputs a sub-electromagnetic valve closing signal to the electromagnetic valve control circuit 27, and closes the sub-electromagnetic valve 8B (step 512), thereby ending the refueling. It turns out.

Next, after the processing device 21 transmits the aforementioned sub-electromagnetic valve closing signal, it performs the addition process in step S13. II
As explained above with reference to the explanatory diagram of FIG. 7(d), in preset oil supply, even after the sub-electromagnetic valve 8B is closed, the oil inside the hose 10 and the piping 4 will leak out in excess.
If this amount is not added, it is not possible to accurately measure the amount of refueling, so the processing device 21 converts the correction value (ADDPLS) stored in the correction amount storage area ADDPLS in the previous preset refueling into the value in the refueling counting area PCOUNT ( PCOUNT) (Step 5)
13) The value after this addition is displayed on the display 15.16 (step 314).

This state corresponds to the shaded area a in FIG. 5(4). Thus, the customer's desired preset value (PRESET)
This means that the oil can be refueled with high precision.

Next, when the operator hooks the refueling nozzle 11 to the nozzle housing 12, the nozzle switch 13 is opened, and this open t@ signal is input to the processing device 21. Thus, the processing bag 2t2
1 is when it is determined that the refueling nozzle 11 is applied (
(see step S15), and in step 16, the value in the refueling counting area PCOUNT is reset in order to count the amount of filling into the hose 10. However, the value of the refueling amount is stored in a separately provided buffer, and the displayed value on the display 15, 16 is not reset to zero until the next refueling and remains displayed. In the preset oil supply, even if the nozzle switch 13 is opened, the motor 5 continues to be activated for only 11 seconds (see FIG. 5(c)).

In this state, the processing device 21 performs N in the next step 517.
An auxiliary solenoid valve opening signal is output to the solenoid valve control circuit 27, and the auxiliary solenoid valve 8B is opened for a fixed short time period t2 seconds (see FIG. 5(N)). In addition, the above-mentioned time of 12 seconds means that the oil liquid flowing out from the hose 10 during preset oil supply is removed from the hose 10.
This is the amount of time required to fill the container and maintain it in an expanded state, and usually 0.5 to 1 second is sufficient. If the piping 4 and hose 10 are filled with oil as described above,
During this time, the oil is measured by the flow meter 7, and the flow signal from the flow transmitter 9 is input to the processing device 21 and counted by the oil supply counting area PCOUT.

However, in preset lubrication, when a preset amount is reached, the solenoid valve 8 automatically closes to supply a fixed amount of lubrication, so unlike normal lubrication in which the operator opens and closes the fuel nozzle 11 , the refueling nozzle 11 may be hung in the nozzle accommodating portion 12 without noticing that it remains open. As a result, if the refueling nozzle 11 is removed during the next refueling operation, there is a risk that the nozzle switch 13 will close and the pump 6 will be driven, resulting in instantaneous discharge of oil. Therefore, the treatment device W21 is the oil supply nozzle 1.
In order to safely confirm whether or not the valve 1 is open, the value counted in the refueling counting area PCOUNT (
It is determined whether or not the count value (PCOUNT) is smaller than a predetermined value (K). Here, since the count value (PCOUNT) is usually about 0.1 to 0.5, the predetermined value (K) For example, it is sufficient to set it to about iJl. Thus, in the determination of step 518, the count value (PCO
UNT) is thicker than the predetermined value (K), the processing device 21 outputs an error display signal to the display section 14 via the display control circuit 24, and each display 15.
Display the displayed value of 16 in flicker mode (step 519).
In addition, in step 519, instead of the flicker display, a buzzer or the like may be sounded, or a voice may be emitted from a speaker by a voice synthesizer. 11, the valve is closed securely, and the nozzle accommodating part 12 is reattached until it is fixed again (Step 520). At this point, the output of the display signal from the processing device 21 is stopped. Step 3
21), return to step 316 again, and step 316~
318 is repeated. Therefore, it is possible to perform a safety check as to whether or not the refueling nozzle 11 remains open through the loop of steps 318 to S21.

Furthermore, in the determination at step 518, the count value (PCOUNT
) is smaller than the predetermined value (K), the processing device 21 transfers the count value (PCOUNT) in the refueling counting area PCOUNT as a correction amount (ADDPLS) to the correction amount storage area ADDPLS and stores it. (Step 522), and this correction amount (ADDPLS)
is used as the correction value (ADDPLS) in step S2 during the next preset lubrication (however, normal lubrication may be performed any number of times during this period). Note that the correction value (ADDPLS) is shown as the shaded area in FIG. 5(a).

When the storage of the correction value (ADDPLS) is completed as described above, the processing device 21 outputs a motor stop signal to the motor drive circuit 26 to stop the motor 5 (step 323).
, ends the series of preset oiling (step 524).
.

Although the present embodiment is as described above, step S16. S1
7 is a specific example of an oil filling means for filling oil into the hose IO, and steps S18 and S22 are specific examples of correction amount storage means for storing the correction amount (ADDPLS). In addition, step S2 sets the correction amount (
This is a specific example of a preset amount correction means that performs subtraction correction of ADDPLS). Further, steps SL8 to SL321 show a specific example of a valve opening detection means for determining whether or not the fuel supply nozzle 11 is opened.

Next, FIG. 6 shows a second embodiment of the present invention.

The feature of this embodiment is that a pump driving motor 5 is used as a refueling stop means during preset refueling in place of the solenoid valve 8 in the first embodiment, and a fixed amount refueling operation is performed by controlling the rotation of the motor 5. It's because I did it.

Therefore, in this embodiment, solenoid valves 8A, 8 are installed in the middle of the pipe 4.
B is not provided, and the quantitative stop mode is also a one-stage stop due to the rotation of the motor 5 being stopped.

That is, in FIG. 6, steps 331 to 347 show a flow chart according to this embodiment, and first, in step 331, the RAM2
In the motor stop value storage area MSTOP 3, a value obtained by subtracting a fixed amount (CONST3) due to inertial rotation of the motor 5 and a correction amount (ADDPLS) from the preset value (PRESET) is stored. Step 532), the same process as in the first embodiment is executed (Steps 333 to 35), and when the amount of oil supplied (PCOUNT) reaches a predetermined value (MSTOP), the motor 5 is stopped (Step 536), Next, steps 337 to 540 are executed in the same way as in the first embodiment, and the motor 5 is rotated for a certain period of time again (step 541).
, the hose 10 is filled with oil. Further, steps 342 to 47 may be carried out in the same manner as in the first embodiment, and since the other operations are the same as in the first embodiment, their explanation will be omitted.

In each of the embodiments, a fixed type refueling device was used as an example of the refueling device used in the present invention, but a suspended type refueling device in which a hose is suspended from a high place at a refueling station so as to be able to rise and fall freely, and a refueling nozzle is provided at the tip of the hose is also applicable. It may also be used as a type oil supply device, in which case the first
Instead of the nozzle switch 13 in the embodiment, a lift switch or the like may be used to raise and lower the refueling nozzle between the standby position and the refueling position.
However, if there is a lever automatic release mechanism that automatically releases the latch mechanism of the nozzle lever when the refueling nozzle 11 is hooked to the nozzle storage part 12, The valve open detection means described above may be unnecessary.

〔Effect of the invention〕

As described in detail above, the present invention is configured such that the hose is filled with oil in advance at the end of preset lubrication, and the filling amount at this time is subtracted and corrected at the time of the next preset lubrication. It is possible to prevent errors from occurring between the preset oil supply and the preset oil supply, and to always perform accurate preset oil supply.

[Brief explanation of drawings]

1 to 5 relate to a first embodiment of the present invention, and FIG. 1 is an overall configuration diagram of a refueling device used in this embodiment, and y4.
Fig. 2 is a control circuit diagram, Fig. 3 is a flowchart showing the preset lubrication processing operation, Fig. 4 is a flowchart showing the flow rate signal interrupt processing operation, Fig. 5 is a time chart showing the preset lubrication operation, and Fig. 6 is a flowchart showing the preset lubrication processing operation. FIG. 7 is a flowchart showing a preset oil supply processing operation according to a second embodiment of the present invention, and FIG. 7 is an explanatory diagram showing problems that occur in each oil supply mode in a conventional oil supply system.

Claims (4)

[Claims] (1) A pump and a flow meter installed in the middle of a pipe whose one end connects to a tank, a refueling nozzle connected to the other end of the pipe via a hose, and a fuel nozzle attached to the flow meter corresponding to the measured flow rate. a flow rate transmitter that outputs a flow rate signal; a display that displays the amount of oil supplied based on the flow rate signal from the flow rate transmitter; a preset means that presets the amount of oil supplied at the time of preset oil supply; In a refueling system comprising a refueling stop means for stopping refueling when a preset amount by the preset means is reached, the oil refilling means for filling the hose with oil after the end of preset refueling; counting the flow rate signal output from the flow rate transmitter when the oil liquid is filled;
comprising a correction amount storage means for storing the correction amount as a correction amount, and a preset amount correction means for reading the correction amount stored in the correction amount storage means at the next preset refueling and performing subtraction correction to the preset amount by the preset means, A refueling system characterized in that the refueling stop means is activated when the refueling amount reaches a preset amount corrected by the preset amount correcting means. (2) The refueling system according to claim (1), further comprising valve open detection means for determining whether or not the refueling nozzle is open after the refueling stop means is activated. (3) The oil supply system according to claim (1), wherein the oil supply stop means is a solenoid valve provided in the middle of the piping. (4) The oil supply system according to claim (1), wherein the oil supply stop means is a motor that drives the pump.