JP3285912B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling device installed in a gas station, and more particularly to a refueling device suitable for improving refueling accuracy and refueling speed during automatic full refueling.

[0002]

2. Description of the Related Art Conventionally, as a refueling device with an automatic refueling function for automatically replenishing a fuel tank of a vehicle or the like, a liquid level detecting device and a foam detecting device are provided at the tip of a discharge pipe of a refueling nozzle. There is known a liquid bubble sensor provided with the above-mentioned liquid bubble sensor, and additional refueling is automatically performed based on the operation of the liquid bubble sensor. When automatic filling is performed with this type of refueling device, bubbles are generated from the tank oil level with the progress of refueling to the fuel tank by the operator opening the nozzle lever.
When the generated foam reaches the liquid foam sensor provided at the tip of the discharge pipe of the refueling nozzle, the pump motor and the solenoid valve are stopped to suspend the refueling, and wait for the foam to disappear on the oil level of the fuel tank. After that, the pump motor and the solenoid valve are operated again to perform additional refueling with a small flow rate. When the liquid foam sensor detects the tank oil level raised by the additional refueling, the full tank refueling is automatically terminated. I have. In other words, when the liquid foam sensor detects bubbles rising before the oil level after the start of refueling during automatic refueling, the pump motor and solenoid valve are stopped to stop refueling, and refueling is resumed after the bubbles disappear. Then, when the liquid foam sensor detects bubbles generated again due to refueling resumption, refueling is interrupted again and refueling is resumed after the disappearance of the foam. The tank oil level rises and the liquid bubble sensor detects the tank oil level within a few repetitions of this control. At this time, control is performed to stop the pump motor and terminate refueling. In this case, the liquid bubble sensor for detecting the liquid level described above is always operated during refueling in order to prevent leakage of the oil liquid from the fuel tank.

[0003]

However, the above-mentioned conventional lubricating apparatus has the following problems. During the automatic filling of the vehicle fuel tank, the oil liquid splashed from the liquid level in the fuel tank where the oil liquid is being discharged from the discharge pipe of the refueling nozzle is applied to the liquid bubble sensor disposed at the tip of the discharge pipe. If so, the adhering oil liquid may cause the liquid bubble sensor to malfunction, resulting in erroneous detection of the liquid level in the fuel tank as a full liquid level, resulting in the pump motor being automatically stopped. For this reason, there has been a problem that accurate filling of the tank cannot be performed. Further, depending on the shape of the fuel tank of the vehicle, the malfunction of the liquid bubble sensor may frequently occur, and similarly to the above, the liquid bubble sensor erroneously detects the liquid level in the fuel tank as a full liquid level and automatically controls the pump motor. There is a problem that accurate full tank refueling cannot be performed due to a temporary stop. Therefore, when the malfunction of the liquid bubble sensor as described above occurs, the pump motor is automatically stopped and the refueling is interrupted. To restart the refueling, the operator once returns the refueling nozzle to the nozzle hook. Since it is necessary to re-drive the pump motor by performing an operation of removing the refueling nozzle from the nozzle hook again later, there has been a problem that the full refueling cannot be performed smoothly.

The present invention has been made to solve the above-mentioned problems, and by appropriately changing the sensitivity of the liquid detecting means before and after the operation of the valve displacement sensor, the liquid detecting means malfunctions due to the rebound of the oil liquid in the fuel tank. It is an object of the present invention to provide a refueling device that reliably prevents the occurrence of a malfunction and improves the refueling accuracy and refueling speed during automatic full refueling.

[0005]

SUMMARY OF THE INVENTION According to the present invention, when automatically filling a fuel tank with a full tank, a predetermined amount of oil is supplied into the fuel tank, and then bubbles generated from the oil level in the fuel tank are filled. In the refueling device configured to complete the automatic full refueling by performing additional refueling with a standby period required for disappearance, an oil liquid discharge pipe and an oil passage communicating with the oil liquid discharge pipe are opened and closed. A refueling nozzle having a valve, a liquid feeding means for supplying an oil liquid to the refueling nozzle, and an additional refueling transition detecting transition to an additional refueling stage in automatic full refueling based on displacement detection of a valve of the refueling nozzle. Detecting means, a liquid detecting means for detecting an oil level in the fuel tank, and lowering the detection sensitivity of the liquid detecting means until the displacement of the valve is detected by the additional refueling transition detecting means, thereby detecting the additional refueling transition. A liquid detection control means for the displacement detection time point of the valve according to stage increase the detection sensitivity of the liquid detection unit,
After the shift to the additional refueling, the liquid supply means is controlled to perform additional refueling from the refueling nozzle into the fuel tank, and when the liquid detecting means detects the oil level in the fuel tank, the liquid supply means And a full tank refueling control means for stopping the means and completing the full tank refueling. Further, in the present invention, at the time of automatic filling of the fuel tank, after supplying a predetermined amount of oil liquid into the fuel tank, a standby period required for disappearance of bubbles generated from the oil level in the fuel tank is interposed. In the refueling apparatus configured to complete the automatic full refueling by performing additional refueling, an oil liquid discharge pipe, a valve for opening and closing an oil passage communicating with the oil liquid discharge pipe, and opening the valve A refueling nozzle having an operation lever for holding the state or the valve closed state, a liquid feeding means for supplying oil to the refueling nozzle, and performing an additional refueling in automatic full tank refueling by manual operation of the operation lever. Additional refueling setting means for instructing, based on the instructions of the additional refueling setting means, additional refueling transition detecting means for detecting that the transition to the additional refueling stage in automatic full tank refueling,
A liquid detecting means for detecting an oil level in the fuel tank, and a detection sensitivity of the liquid detecting means is reduced until the displacement of the valve is detected by the additional refueling transition detecting means; Liquid detection control means for increasing the detection sensitivity of the liquid detection means from the time of displacement detection, and after the shift to the additional refueling, controls the liquid supply means to perform additional refueling from the refueling nozzle into the fuel tank, When the liquid detecting means detects the oil level in the fuel tank, the liquid supply means is stopped and a full tank refueling control means for completing the full tank refueling is provided.

[0006]

According to the present invention, when the fuel tank is fully refueled, the detection sensitivity of the liquid detecting means is reduced before the shift to the additional refueling stage, and the detection of the liquid detecting means is started from the time of shifting to the additional refueling stage. In order to increase the sensitivity, malfunction of the liquid detecting means can be reliably prevented. As a result, accurate automatic full tank refueling can be performed, and refueling accuracy and refueling speed can be improved. As a result, the liquid foam sensor malfunctions due to the phenomenon that the oil liquid splashed from the oil level in the fuel tank adheres to the liquid foam sensor at the time of refueling and the pump motor stops automatically, resulting in an accurate It is possible to solve a problem that a full tank refueling cannot be performed, and a problem that a liquid bubble sensor malfunctions due to a shape of a fuel tank and an accurate full tank refueling cannot be performed. Further, as in the prior art, when the malfunction of the liquid bubble sensor occurs and the pump motor stops automatically, the operator once again returns the oiling nozzle to the nozzle hook and then removes it again, thereby driving the pump motor again, A complicated operation such as restarting the refueling can be eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a fixed lubricating apparatus will be described below with reference to the drawings. FIG. 1 is an overall view of an oil supply device according to the present embodiment. Inside the oil supply device, a liquid supply means (oil supply pump) 2 for pumping oil from an underground tank (not shown) via a pipe 1 and the oil supply device Liquid means (oil pump)
2, a flow meter 4 for measuring the refueling flow rate, a flow rate pulse transmitter 5 attached to the flow meter 4 for outputting a flow rate pulse proportional to the flow rate, and a refueling nozzle to be described later. A nozzle switch 6 for outputting an OFF signal / ON signal in accordance with the above, a display 7 for displaying a refueling amount and the like,
A control device 8 for controlling each part of the refueling device is provided. A refueling hose 9 is connected to the downstream side of the pipe 1, and a nozzle hook 10 is attached to a tip of the refueling hose 9.
A refueling nozzle 11 that can be hooked / removed is connected to and connected to the fuel supply nozzle 11. An additional refueling setting means (manual switch) to be described later is provided at an appropriate position of the nozzle body of the refueling nozzle 11.
12 (see FIG. 5), and at the distal end side of the discharge pipe 23, an air communication port 74 and a liquid detecting means 79 described later are provided (see FIG. 2).

The lubricating apparatus of this embodiment has basically the same structure as that of the lubricating apparatus described in Japanese Utility Model Application No. 63-36271 filed by the present applicant. The software configuration according to the operation flowchart is different. That is, the oil supply device of the present embodiment causes the rebound of the oil liquid in the fuel tank by appropriately changing the sensitivity of the liquid detection means 79 before and after the operation of the additional oil supply transition detection means (valve displacement sensor) 66 described later. Thus, it is characterized in that the malfunction of the liquid detecting means 79 is reliably prevented, and the lubrication accuracy and the lubrication speed at the time of automatic full tank refueling are improved.

Next, the detailed structure of the oil supply nozzle 11 will be described with reference to FIGS. 2 to 4. An oil passage 22 is provided inside the nozzle body 21 and an oil passage 2 is provided at the tip end of the nozzle body.
A discharge pipe 23 communicating with the nozzle 2 protrudes coaxially with the nozzle body 21. Reference numeral 24 denotes a valve seat for opening and closing the oil passage 22, and a main valve body 26 constituting the valve body 25 is disposed so as to be able to be detached and seated. An insertion hole 27 is formed in the main valve body 26, and a concave portion 28 and a convex portion 29 are formed on both sides of the oil passage 2.
2 are formed to face upstream and downstream, respectively, and minute passages 30 and 30 are formed therein. In the oil passage 22 of the nozzle body 21, a shaft support portion 31 having a shaft insertion hole 31A on the inside.
And a sleeve 32 is fitted in the shaft insertion hole 31A. Reference numeral 33 denotes a valve shaft disposed on the shaft support portion 31 via a sleeve 32 so as to be able to advance and retreat in the direction of arrows AA '.
A sub-valve element 34 that constitutes the valve element 25 together with the main valve element 26 is formed integrally at the front end side. A rod insertion hole 35 is formed in the rear end side of the valve shaft 33 in the axial direction, and a cutout portion 36 is formed. An insertion nut 27 for adjusting the valve opening of the sub-valve body 34 is fixed to the front end side of the sub-valve body 34 in the insertion hole 27. 38
Is a small flow passage provided in the valve shaft 33, and has an inflow port 38A,
An oil passage 38B and an outlet 38C are provided, and a valve seat portion 39 is disposed in the middle of the small flow passage 38. The valve shaft 33 is urged in the direction of arrow A ′ by the compression spring 40 to seat the main valve body 26 on the valve seat 24.

Reference numeral 41 denotes a sliding rod inserted into the rod insertion hole 35, which has a small diameter portion 41A, a valve portion 41B, and an intermediate portion 41.
C, a large diameter portion 41D, an engagement groove 42 corresponding to the cutout portion 36 is formed in the middle outer periphery of the intermediate portion 41C, and a lever engagement hole 43 is formed in the large diameter portion 41D. . In this case, the positioning pin 45 is engaged with the first positioning groove 44 on the outer periphery of the valve shaft 33, and the positioning pin 4 is inserted into the second positioning groove 46 on the rod insertion hole 35 side of the valve shaft 33.
By the engagement of 7, the notch 36 and the engaging groove 42 are positioned so as to correspond to each other. 48 is the nozzle body 2
The lever guard 49 attached to 1 has a bent portion 49A having a bent portion 49A above a rear portion of the lever guard 48 via a shaft 50 through an arrow B-.
An L-shaped connecting lever rotatably attached in the direction B ', one end 49B of which is fitted into the lever engaging hole 43 through the opening 51 of the nozzle body 21, and the other end 49C is the nozzle body. 21 extends to the tip side. Reference numeral 52 denotes a weak spring which is stretched between the large diameter portion 41D and the shaft support portion 31.
B, the lever 49 and the sliding rod 41 are kept interlocked, and a counterclockwise force about the shaft 50 acts on the lever 49, and the other end of the lever 49 49C is to be rotated in the direction of arrow B '.

On the other hand, reference numeral 53 denotes an operation lever for slidingly displacing the valve shaft 33 against the force of the compression spring 40. The operation lever 53 is located inside the lever guard 48, and has one end 53A which is pivoted above the front part of the lever guard 48. The other end 53B is rotatable in the direction of the arrow CC ′. Then, the other end 49C of the communication lever 49 slidably abuts the intermediate portion 53C of the operation lever 53, and the operation lever 53 is moved by the arrow C '.
The interlocking is maintained by turning in the direction. The other end 53B of the operation lever 53 is connected to the valve body 25 disposed on the lever guard 48 by a half-opening hook 55.
Alternatively, the operation lever 53 can be held at a predetermined rotation position about the shaft 54 by being locked to the full-opening hook 56.

Reference numeral 57 in FIG. 3 denotes an automatic valve closing mechanism for automatically closing the valve body 25 when the liquid level in the fuel tank of the refueling vehicle reaches a predetermined liquid level. 58 is a diaphragm constituting the automatic valve closing mechanism 57,
The peripheral edge portion is fixed to the nozzle body 21. Reference numeral 59 denotes a cap located outside the diaphragm 58 and disposed on the nozzle main body 21. A negative pressure chamber 60 is provided between the cap 59 and the diaphragm 58. A receiving plate 61 is located on the other side of the negative pressure chamber 60 and fixed to the center of the diaphragm 58. The receiving plate 61 is formed in a U-shape as shown in FIG. , 62 are formed. Numerals 63, 63 denote a pair of rod-shaped rollers whose both ends in the axial direction are fitted into the elongated holes 62, 62, which are detachably engaged from the notch 36 to the engaging groove 42. Reference numeral 64 denotes a spring which is located in the negative pressure chamber 60 and is stretched between a spring receiver 65 disposed on the diaphragm 58 side and the cap 59. The spring 64 extends through the diaphragm 58 and the receiving plate 61 to each rod-shaped roller 63. Engagement groove 42 of sliding rod 41
It is urged to fit inside. Thus, the automatic valve closing mechanism 57 includes the diaphragm 58, the cap 59, the receiving plate 6
1, a rod-shaped roller 63 and a spring 64. By the operation of the automatic valve closing mechanism 57, the valve body 25 opens regardless of the valve operating position of the operating lever.
8A, the oil path 38B, and the outlet 38C are ensured to communicate with each other, so that a small amount of additional oil can be supplied by driving the liquid feeding means.

Reference numeral 66 denotes an additional refueling transition detecting means (valve displacement sensor) which is disposed on the upper part of the nozzle body 21 and detects displacement of the diaphragm 58 to perform a full refueling control. Is provided with a photocoupler 67 having a light-emitting element and a light-receiving element, and a slit 68 that is provided upright on the receiving plate 61 as shown in FIG. 4 and cuts off between the light-emitting element and the light-receiving element with the displacement of the diaphragm 58. It is connected to the control device 8 via a signal line 69. The valve displacement sensor 66 detects that the bubbles in the atmosphere communication port 74 disposed at the end of the discharge pipe 23 have been closed by the rise of the oil level in the fuel tank at the time of refueling.
The displacement of the diaphragm 58 due to a negative pressure change of 0 is detected. That is, the valve displacement sensor 66 outputs a “1” signal when the displacement of the diaphragm 58 is detected, and outputs a “0” signal when the displacement is not detected. Reference numeral 70 denotes a connection port member fastened to the tip end side of the nozzle body 21 by a fastening member 71, and the discharge pipe 23 is screwed thereto. An auxiliary valve 72 is slidably inserted in the valve support portion 70A of the connection port member 70 so as to face the main valve body 26. The auxiliary valve 72 is attached to the valve seat 24 by a spring 73 so as to be always seated on the valve seat 24. It is being rushed. Numeral 74 denotes an atmosphere communication port provided at the tip of the discharge pipe 23, and a negative pressure pipe 75 provided inside the discharge pipe 23 and the nozzle body 21.
Automatic valve closing mechanism 57 through the air passage 76 formed in
The negative pressure chamber 60 communicates with the negative pressure chamber 60.

On the other hand, 77, 77 are intake passages arranged in the valve seat 24, one end of which communicates with a ventilation passage 76 between the negative pressure pipe 75 and the negative pressure chamber 60, and the other end of which is connected to the valve seat 24. And auxiliary valve 7
2 communicates with an annular passage 78. Numeral 79 is a liquid detecting means which is located at the tip of the discharge pipe 23 and is located on the distal end side from the atmosphere communication port 74 and detects the liquid level of the fuel tank. The liquid detecting means 79 is connected to the control device 8 via a signal line 80. ing. The liquid detecting means 79 may be of any type such as an ultrasonic type, a photoelectric type and a capacitance type. 81 is a plug disposed at the end of the nozzle body 21 to close the opening 82;
Reference numeral 3 denotes a tubular connection member screwed into an opening 84 communicating with the oil passage 22, and reference numeral 85 denotes a coupling member which is pivotally connected to the tubular connection member 83 and pivotally connected to the oil supply hose 9.

As shown in FIG. 5, the control system according to the present embodiment includes a liquid detecting means 79 for detecting the liquid level in the fuel tank, and an additional refueling shift detecting means for detecting bubbles generated from the liquid level in the fuel tank. (Valve displacement sensor) 66, after the completion of the full tank refueling control (a state in which the liquid detecting means 79 detects the full tank liquid level and the liquid feeding means 2 is stopped based on the detected level), the refueling nozzle supplies the minute remaining amount of additional lubrication. It comprises an additional refueling setting means (manual switch) 12, a liquid feeding means (oil refueling pump) 2, and a control device (microcomputer) 8, which are set and operated when the operation lever 53 of 11 is manually operated.
The liquid detecting means 79 sends a liquid level detection signal based on the liquid level detection in the fuel tank to the control device 8, and the additional refueling transition detecting means 66 detects the low flow refueling transition based on the foam detection in the fuel tank. At this time, the output detection signal is sent to the control device 8, and the additional refueling means sends an additional refueling signal based on the operation to the control device 8. The control device 8 controls the additional refueling setting means (manual switch) 12 before the time when the additional refueling transition detecting means (valve displacement sensor) 66 operates at the time of full refueling of the fuel tank or by the operator. Until the time when the setting operation is performed, the detection output of the liquid detecting means 79 is ignored. On the other hand, after the time point, the control device 8 takes in the detection output of the liquid detection means 79 and controls the liquid supply means (oil supply pump) 2 to perform additional oil supply a predetermined number of times while reducing the flow rate. When the liquid detecting means 79 operates, the full tank refueling is completed.

Here, the control device 8 executes an interrupt process, a manual switch pressing frequency counting process (PRC
1) The main processing is performed, and a bubble detection counter (BL.C) for counting the number of times of detection of bubbles by the additional refueling transition detecting means (valve displacement sensor) 66, and a bubble detection flag (BL) for storing the bubble detection .F), a liquid detection counter (LQ.C) for counting the number of times of detection of the liquid by the liquid detection means 79, a liquid detection flag (LQ.F) for storing the liquid detection, and an additional refueling setting means (manual switch). 12 is a manual switch press count counter (SW.
C) and additional refueling setting means (manual switch) 12
Manual switch operation flag (S
W. F) and a liquid detection frequency counter (IC.C) for counting the number of times of liquid detection by the liquid detecting means 79.

When the additional refueling transition detecting means (valve displacement sensor) 66 detects a foam, the control device 8 counts up a foam detection counter (BL.C).
The bubble detection flag (BL.F) is set, and the liquid detection means 79
Detects the liquid, the liquid detection counter (LQ.C) is counted up, and the liquid detection flag (LQ.F) is set. In addition, the bubble detection counter (B
L. C), the liquid detection counter (LQ.C) takes a value from 0 to a limit value (for example, an integer value 255 in this embodiment, but is not limited to this value).
When the limit value is reached, counting up is stopped and the limit value is maintained. Normally, the priority of an interrupt process described later is higher than that of the main process. However, when the main process disables an interrupt, the interrupt process is started after the execution of the main process.

FIG. 6 shows the relationship among the nozzle switch, the bubble signal, the liquid signal, the bubble detection flag, the liquid detection flag, and the refueling pump when the fuel tank is full according to the present embodiment. In the state shown in the figure, the liquid signal is output from the liquid detecting means 79. However, since the bubble detection flag is in the OFF state, the liquid detection flag is not turned ON, and the refueling pump is not stopped. In the state shown in the figure, the liquid signal is output from the liquid detecting means 79. However, since the bubble detection flag is ON, the liquid detection flag is turned ON, and the refueling pump is stopped. In the state shown in FIG.
Although the liquid signal is output from 9, in the example of FIG. 6, since the number of times of liquid detection is equal to or more than a predetermined set value, the liquid detection flag is not turned on, and the refueling pump is not stopped. In the state shown in the figure, the liquid detection flag keeps the ON state for a predetermined period of time, so that after the refueling is performed, the refueling pump is stopped. This reliably prevents a malfunction of the liquid detecting means due to the rebound of the oil liquid in the fuel tank at the time of automatic full refueling, and improves the refueling accuracy and the refueling speed at the time of automatic full refueling. ing.

Here, each processing described later in this embodiment (FIGS.
The attributes and uses of the symbols used in FIG. 9) will be described. The attribute of C is a counter variable, and its use is a counter for detecting and counting bubbles in the additional refueling transition detecting means (valve displacement sensor) 66. The attribute of C is a counter variable, and the application is a counter for detecting and counting the liquid of the liquid detecting means 79.
L. The attribute of F is a flag variable and the use is a bubble detection flag (undetected = 0, detected = 1). The attribute of F is a flag variable and the use is a liquid detection flag (undetected = 0, detected =
1), IC. The attribute of C is a counter variable, and the application is a counter for counting the number of times of liquid detection. The attribute of C is a counter variable and the purpose is additional lubrication setting means (manual switch) 1
2 is a counter for counting the number of times of depression. The attribute of F is a flag variable, and the use is an operation flag of the additional refueling setting means (manual switch) 12. Also, the attribute of Z1 is a constant and the application is an additional refueling shift detection determination value, the attribute of Z2 is a constant and the application is a liquid detection determination value, the attribute of Z3 is a constant and the application is a liquid detection count determination value, The attribute of Z4 is a constant and the use is a liquid detection determination value. The attribute of Z5 is a constant and the use is a liquid detection determination value. The attribute of Z6 is a constant and the use is the number of times the additional refueling setting means (manual switch) 12 is pressed. It is a judgment value. The above variables are all initialized to 0 before the start of refueling. In addition, each of the determination values Z1 to
The sensitivity of the liquid detecting means 79 can be changed by Z6. Further, a relationship of Z2 ≧ Z4 ≧ Z5 is established between the three liquid detection determination values.

Next, the operation of the lubricating apparatus of the present embodiment configured as described above will be described with reference to FIGS.

"Interruption process" (FIG. 7) The interruption process is a process executed at regular time intervals (for example, 5 ms in this embodiment) based on the time counted by the internal timer of the control device 8. The control device 8 determines whether or not the worker has removed the refueling nozzle from the nozzle hook when filling the vehicle with a full tank, that is, whether or not the nozzle switch 6 is in the ON state (step SA1). If the nozzle switch 6 is in the OFF state, the process waits.
It is determined whether or not 6 has been activated (step SA2). That is, the tank oil level rises due to refueling to the vehicle fuel tank, the air communication port 74 at the tip of the discharge pipe 23 is closed by bubbles, and additional refueling is performed based on the displacement of the diaphragm 58 due to the negative pressure change in the negative pressure chamber 60. It is determined whether or not the transition to the additional oil supply transition detection means (valve displacement sensor) 66 has been detected. When the additional refueling transition detecting means 66 is not operating, the controller 8 controls the bubble detection counter BL. C is reset (step SA3), and if activated, the bubble detection counter BL. C is incremented by one. Next, the control device 8 determines whether or not the liquid detecting means 79 is operating (step SA5). If not, the liquid detecting counter LQ. While resetting C (step SA6),
If the liquid detection counter LQ. C is counted up by one (step SA7).

"Manual switch press count counting process"
(FIG. 8) In the manual switch pressing frequency counting process, the additional refueling setting means (manual switch) 12 is pressed in order to refuel the minute remaining amount of refueling for filling the fuel tank by manual operation of the operation lever. This is a process of counting the number of times the operation has been performed. The control device 8 determines whether or not the operator has removed the refueling nozzle from the nozzle hook when the vehicle is fully refueled, that is, whether or not the nozzle switch 6 is in the ON state (step SB1). Nozzle switch 6 is OFF
If the nozzle switch 6 is turned on while the state is the standby state, it is determined whether the additional refueling setting means (manual switch) 12 is operating (step S).
B2). That is, the operator has depressed the additional refueling setting means 12 in order to manually operate the operation lever 53 of the refueling nozzle 11 to perform additional refueling with a minute remaining amount after the completion of the full refueling control at the time of the full refueling. It is determined whether or not. When the additional refueling setting means 12 is not operated, the controller 8 sets the manual switch operation flag SW. F is reset (step SB3), and if it is activated, the manual switch operation flag SW. It is determined whether or not F is in a reset state (step SB4). The controller 8 controls the manual switch operation flag SW. F is in the reset state, the manual switch press count counter SW. C
Is incremented by one (step SB5), and then the manual switch operation flag SW. While F is set (step SB6), if it is not in the reset state, the process of step SB6 is directly performed.

"Main processing" (FIG. 9) In the main processing, a bubble detection flag and a liquid detection flag are set based on the values of the bubble detection counter and the liquid detection counter counted in the interrupt processing. This is a process for performing drive control. The control device 8 includes a counter BL. C is compared with the refueling transfer detection determination value Z1 (step SC1), and the counter BL. If the counted value of C is larger than Z1, the bubble detection flag BL. While setting F (step SC2),
The counter BL. C is equal to or less than Z1, the bubble detection flag BL. F is reset (step SC3). Next, the controller 8 sets the bubble detection flag BL. It is determined whether F is '0' (not detected) or '1' (detected) (step SC
4), bubble detection flag BL. F is '1', the liquid detection number counter IC. C> the liquid detection number determination value Z3 is satisfied or not, or the manual switch pressing number counter SW. C is determined whether the count value of the manual switch depression count value Z6 is satisfied (step SC5), while the bubble detection flag BL. When F is '0', the liquid detection count counter LQ. C and liquid detection judgment value Z
Then, a comparison is made between the magnitudes of the two (step SC6).

The control device 8 stores the liquid detection determination value Z4 in the storage unit when the relational expression is satisfied in the determination in the step SC5 (step SC7), and when the relational expression does not hold, the liquid detection determination value Z4 is stored. The determination value Z5 is stored in the storage unit (Step SC8). Next, the control device 8 controls the liquid detection and counting counter LQ. C and the storage value (Z
4 or Z5) (step SC
9), counter LQ. C is larger than the stored value, the liquid detection flag LQ. F (step SC10) while the counter LQ. If the count value of C is equal to or smaller than the stored value, the process proceeds to the determination in step SC11 described later.

On the other hand, the control device 8 executes the processing in step SC6.
Is determined, the liquid detection count counter LQ. If the count value of C> the liquid detection determination value Z2 holds, the process proceeds to step SC10, while the liquid detection count counter LQ. C is satisfied, the liquid detection flag LQ. F is '1'
(Detected) or '0' (not detected) (step S
C11). Control device 8 controls liquid detection flag LQ. F is '1', the liquid detection number counter IC. C to 1
After counting up (step SC12), the liquid detection flag LQ. F (Step SC1)
3), the liquid detection flag LQ. If F is '0', the process of step SC13 is directly performed. Thereafter, the above step SC
It returns to the process of 1.

The present invention has the following modifications. In the above embodiment, the case of the fixed type lubricating apparatus has been described, but the present invention can also be applied to a suspension type lubricating apparatus. In the above embodiment, the pump motor 3 for driving the oil supply pump 2 is controlled as the oil supply stop mechanism. However, as shown by a broken line in FIG. The valve closing control may be performed with 1A as a refueling stop mechanism.

[0027]

As described above, according to the present invention, when the fuel tank is automatically refilled, a predetermined amount of oil is supplied into the fuel tank and then generated from the oil level in the fuel tank. In the refueling device configured to complete the automatic full refueling by performing additional refueling with a standby period required for disappearance of bubbles, an oil liquid discharge pipe, an oil passage communicating with the oil liquid discharge pipe are formed. A refueling nozzle having a valve that opens and closes, a liquid feeding unit that supplies oil to the refueling nozzle, and an addition that detects a transition to an additional refueling stage in automatic full refueling based on displacement detection of a valve of the refueling nozzle. Refueling transition detecting means, liquid detecting means for detecting the oil level in the fuel tank, and lowering the detection sensitivity of the liquid detecting means until the displacement of the valve is detected by the additional refueling transition detecting means, and Liquid detection control means for increasing the detection sensitivity of the liquid detection means from the time when the displacement of the valve is detected by the detection means, and after the shift to the additional refueling, the liquid supply means is controlled and added from the refueling nozzle into the fuel tank. When the liquid detecting means detects the oil level in the fuel tank, the liquid detecting means stops the liquid sending means and has a full tank refueling control means for completing the full tank refueling, and The present invention provides an automatic filling method for a fuel tank, in which a predetermined amount of oil liquid is supplied into the fuel tank, and then a standby period required for disappearance of bubbles generated from an oil liquid surface in the fuel tank is interposed. By performing additional refueling, in a refueling apparatus configured to complete the automatic full tank refueling, an oil liquid discharge pipe, a valve that opens and closes an oil passage communicating with the oil liquid discharge pipe, the valve is in an open state or Closed A refueling nozzle having an operation lever for maintaining the state, a liquid feeding means for supplying oil to the refueling nozzle, and an instruction for instructing that additional refueling in automatic full tank refueling be performed by manual operation of the operation lever. Additional refueling setting means, based on instructions of the additional refueling setting means, additional refueling transition detecting means for detecting that the transition to the additional refueling stage in automatic full tank refueling,
A liquid detecting means for detecting an oil level in the fuel tank, and a detection sensitivity of the liquid detecting means is reduced until the displacement of the valve is detected by the additional refueling transition detecting means; Liquid detection control means for increasing the detection sensitivity of the liquid detection means from the time of displacement detection, and after the shift to the additional refueling, controls the liquid supply means to perform additional refueling from the refueling nozzle into the fuel tank, When the liquid level in the fuel tank is detected by the liquid detecting means, the liquid feeding means is stopped, and the tank is filled with a full tank refueling control means for completing the full tank refueling. Can play. At the time of refueling the fuel tank, before the shift to the additional refueling stage, while ignoring the detection output of the liquid detecting means,
Since the detection output of the liquid detecting means is taken in at the time of transition to the additional refueling stage, malfunction of the liquid detecting means can be reliably prevented. As a result, accurate automatic full tank refueling can be performed, and refueling accuracy and refueling speed can be improved. As described above, the liquid foam sensor malfunctions due to the phenomenon that the oil liquid splashed from the oil level in the fuel tank adheres to the liquid foam sensor at the time of refueling, and the pump motor stops automatically. It is possible to solve a problem that a full tank refueling cannot be performed, and a problem that a liquid bubble sensor malfunctions due to a shape of a fuel tank and an accurate full tank refueling cannot be performed. As described above, when the pump motor is automatically stopped due to the malfunction of the liquid bubble sensor as in the related art, the operator restarts the pump motor by removing the oiling nozzle once to the nozzle hook and then removing it again. Thus, complicated operations such as restarting the refueling can be eliminated.

[Brief description of the drawings]

FIG. 1 is an overall view of an oil supply device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a fueling nozzle of the present embodiment.

FIG. 3 is a cross-sectional view of the fueling nozzle of the present embodiment.

FIG. 4 is a perspective view of a receiving plate, a photocoupler, a slit, and the like of the present embodiment.

FIG. 5 is a control block diagram of the present embodiment.

FIG. 6 is a full tank control time chart according to the present embodiment.

FIG. 7 is a flowchart of an interrupt process according to the embodiment.

FIG. 8 is a flowchart of a manual switch pressing frequency counting process of the present embodiment.

FIG. 9 is a flowchart of a main process according to the present embodiment.

[Explanation of symbols]

 2 Refueling pump (liquid supply means) 8 Control device (liquid detection control means, full tank refueling control means) 11 Refueling nozzle 12 Additional refueling setting means 23 Discharge pipe (oil liquid discharge pipe) 24 Valve seat (valve) 25 Valve body ( Valve) 26 main valve element (valve) 33 valve shaft (valve) 66 additional oil supply transition detecting means 79 liquid detecting means

Claims (2)

(57) [Claims] When a predetermined amount of oil is supplied to the fuel tank during the automatic filling of the fuel tank, a standby period required for disappearance of bubbles generated from the oil level in the fuel tank is interposed. An oil refueling nozzle configured to complete the automatic full refueling by performing additional refueling by means of an oil refueling pipe, an oil refueling nozzle having a valve for opening and closing an oil passage communicating with the oil refueling pipe, Liquid supply means for supplying oil to the refueling nozzle, additional refueling transition detecting means for detecting transition to an additional refueling stage in automatic full refueling based on displacement detection of a valve of the refueling nozzle; A liquid detecting means for detecting an oil level, and a detection sensitivity of the liquid detecting means is reduced until a displacement of the valve is detected by the additional refueling transition detecting means, and a displacement of the valve by the additional refueling transition detecting means. Liquid detection control means for increasing the detection sensitivity of the liquid detection means from the time of discharge, and after shifting to the additional refueling, controls the liquid supply means to perform additional refueling from the refueling nozzle into the fuel tank, A refueling device comprising: a full tank refueling control unit that stops the liquid feeding unit when the oil level in the fuel tank is detected by the detecting unit and completes the full tank refueling. 2. A method for automatically filling a fuel tank with a fuel tank, comprising: supplying a predetermined amount of oil liquid to the fuel tank; and interposing a standby period required for disappearance of bubbles generated from an oil liquid level in the fuel tank. The oil supply device is configured to complete the automatic full tank refueling by performing additional refueling by means of an oil supply pipe, a valve for opening and closing an oil passage communicating with the oil supply pipe, and a valve in an open state. Alternatively, an oil supply nozzle having an operation lever for holding the valve closed, liquid supply means for supplying oil to the oil supply nozzle, and an instruction to perform additional oil supply in automatic full tank oil supply by manual operation of the operation lever. Additional refueling setting means for performing the refueling, an additional refueling transition detecting means for detecting a transition to an additional refueling stage in automatic full tank refueling based on an instruction of the additional refueling setting means, and an oil refueling tank. Liquid detection means for detecting the surface, and the detection sensitivity of the liquid detection means is reduced until the displacement of the valve is detected by the additional refueling transition detection means, and the liquid is detected from the time when the displacement of the valve is detected by the additional refueling transition detection means. Liquid detection control means for increasing the detection sensitivity of the detection means; and after the shift to the additional refueling, the liquid supply means is controlled to perform additional refueling from the refueling nozzle into the fuel tank. And a full tank refueling control means for stopping the liquid feeding means and completing the full tank refueling when an oil level in the inside is detected.