JP2020200094A - Fuel supply device - Google Patents

Abstract

To provide a fuel supply device for suppressing an instantaneous and rapid rise in pressure having a starting point at a valve mechanism of a fuel supply nozzle, caused by actuation of an automatic full tank valve closing mechanism.SOLUTION: The fuel supply device comprises: a fuel supply nozzle including a valve mechanism 40 for adjusting a fuel discharge amount from a discharge pipe according to an amount of operation of a nozzle lever 31, and an automatic valve closing mechanism 60 that displaces a diaphragm 65 by a differential pressure created between a negative pressure chamber 66 and an atmospheric pressure chamber 67 as a result of a fuel liquid surface in a supply target reaching a tip of the discharge pipe so as to cause the valve mechanism to come into a valve closed state regardless of a valve opening operation state of the nozzle lever, in linkage with a displacement of the diaphragm, wherein the diaphragm defines both chambers; a state detector 80 that detects that the automatic valve closing mechanism is in a state immediately before closing the valve, when the fuel is being supplied from the pump to the fuel supply nozzle; and a control device that instructs a pump motor driving circuit to make a fuel supply volume from the pump to the fuel supply nozzle 30 reduced in comparison with a volume before the detection, based on a detection output of the state detector.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a fuel supply device for refueling a fuel tank of a vehicle or the like, and particularly to an improvement of the fuel supply device provided with an automatic full tank stop nozzle.

Refueling of a fuel tank of a vehicle or the like is usually performed using a fuel supply device installed in a fuel supply facility such as a gas station. The fuel supply device sends the fuel stored in the liquid storage tank toward the fuel supply hose via a measuring device such as a flow meter by driving a liquid feeding device such as a pump, and the tip of the fuel supply hose. The fuel supply nozzle provided on the side is operated to discharge fuel from the tip of the nozzle cylinder to the fuel tank of the vehicle or the like to be supplied to perform the fuel supply work.

In the fuel supply operation, the drive and stop of the liquid feeding device such as a pump are controlled, for example, in response to the removal and storage of the fuel supply nozzle with respect to the nozzle storage portion provided in the fuel supply device. The amount of fuel discharged from the tip of the nozzle cylinder (flow rate per unit time) is determined by the operator operating the nozzle lever of the fuel supply nozzle and using the valve opening of the valve mechanism provided in the fuel supply nozzle as the amount of operation of the nozzle lever. By changing accordingly, it is manually adjusted within the range of the maximum discharge amount used, including the discharge cutoff state (fuel supply stop state in which the flow rate per unit time is 0).

Normally, the fuel supply nozzle is used to prevent fuel from overflowing from the fuel supply port of the supply target when the amount of liquid in the fuel tank of the vehicle or the like to be supplied exceeds the full tank during the fuel supply work. It is equipped with an automatic full tank closing mechanism. As the automatic full tank closing mechanism of the fuel supply nozzle, for example, an automatic valve closing mechanism provided with a diaphragm member that defines a negative pressure chamber and an atmospheric pressure chamber as disclosed in Patent Document 1 is used. ing. This type of automatic valve closing mechanism is a difference that occurs between the negative pressure chamber and the atmospheric pressure chamber when the fuel liquid level in the fuel supply target reaches the nozzle cylinder tip of the fuel supply nozzle or its vicinity during the fuel supply work. It is a mechanical mechanism that displaces the diaphragm member by pressure and closes the valve mechanism provided in the fuel supply nozzle in conjunction with the displacement of the diaphragm member regardless of the operating state of the nozzle lever.

Japanese Unexamined Patent Publication No. 2005-289454

By the way, in the fuel supply device provided with such an automatic full tank stop nozzle, when the fuel discharge from the fuel supply nozzle is suddenly stopped by the operation of the automatic full tank closing mechanism, the pump or the like is fed until now. The flow of the fuel fluid that has been sent out toward the fuel supply hose by driving the liquid equipment and discharged from the fuel supply nozzle is suddenly stopped by the valve mechanism of the fuel supply nozzle. As a result, in the fuel supply path on the upstream side of the fuel supply nozzle, a momentary and rapid pressure rise occurs starting from the valve mechanism of the fuel supply nozzle, and a so-called water hammer is generated.

In the fuel supply device, every time the automatic full tank closing mechanism is activated, such a momentary and sudden increase in pressure is repeated in the fuel supply path on the upstream side of the fuel supply nozzle. Such a momentary and sudden increase in pressure causes the functionality and reliability of equipment such as safety fittings, pumps, flow meters, etc., and parts such as packing, seals, etc., which are located upstream of the fuel supply nozzle. , Durability, etc. may cause unexpected deterioration.

In view of the above-mentioned problems, the present disclosure provides a fuel supply device that suppresses a momentary and sudden pressure increase starting from the valve mechanism of the fuel supply nozzle due to the operation of the automatic full tank closing mechanism. The purpose.

In order to solve the above-mentioned problems, the fuel supply device of the present disclosure has a valve mechanism that adjusts the fuel discharge amount from the nozzle cylinder tip according to the operation amount of the nozzle lever, and the fuel liquid level in the supply target is the nozzle cylinder tip. Alternatively, the diaphragm that defines both chambers is displaced by the differential pressure generated between the negative pressure chamber and the atmospheric pressure chamber by reaching the vicinity thereof, and the valve mechanism is linked to the displacement of the diaphragm to cause the nozzle lever. A fuel supply nozzle equipped with an automatic valve closing mechanism that closes the valve regardless of the valve opening operation state, and a liquid feeding device that feeds the fuel stored in the liquid storage tank to the fuel supply nozzle. In order to adjust the amount of fuel supplied from the liquid feeding device to the fuel supply nozzle, the drive source of the liquid feeding device is changed to the fuel feeding amount to the fuel supply nozzle. A drive adjusting means that adjusts accordingly, and a state detector that detects that the automatic valve closing mechanism is about to close the valve during fuel feeding from the liquid feeding device to the fuel supply nozzle. Based on the detection output of the state detector, the drive adjusting means is instructed to reduce the amount of fuel fed from the liquid feeding device to the fuel supply nozzle compared to before the detection. The drive control means is provided.

According to the fuel supply device of the present disclosure, it is possible to suppress a momentary and sudden pressure increase starting from the valve mechanism of the fuel supply nozzle due to the operation of the automatic full tank closing mechanism, and thus the fuel supply nozzle. It is possible to suppress the cause of unexpected deterioration in the functional reliability and durability of the equipment and parts arranged on the upstream side. As a result, it is possible to improve the functional reliability performance and maintenance performance of the fuel supply device itself.
In addition, issues, configurations, and effects other than those described above in the present disclosure will be clarified by the following description of the embodiments.

It is a schematic block diagram of one Example of the refueling device as one Embodiment of the fuel supply device which concerns on this disclosure. It is a partial block sectional view of one Example of the refueling nozzle applied to the refueling apparatus of this Example. It is a flowchart which showed the control composition of the refueling work in the refueling apparatus of this Example. It is a characteristic explanatory view of the refueling work performed using the refueling device of this Example. It is a characteristic explanatory diagram of the refueling work performed by using the conventional refueling device as a comparative example.

Hereinafter, the fuel supply device according to the present disclosure will be installed at a refueling station such as a gas station, the tip of the refueling nozzle will be inserted into the refueling port of the vehicle, and fuel such as gasoline and light oil will be replenished to the fuel tank of the vehicle. The refueling device will be described as an example based on the drawings.
In the following description, a ground-mounted refueling device will be described as an example, but the refueling device applied to the fuel supply device according to the present disclosure is a refueling device other than the ground-mounted type, such as a suspended refueling device. It is also applicable to.

FIG. 1 is a schematic configuration diagram of an embodiment of a refueling device as an embodiment of the fuel supply device according to the present disclosure.

In FIG. 1, the refueling device 1 shows a ground-mounted refueling device. The refueling device 1 includes a refueling device main body (fuel refueling device housing) 10, a refueling hose (fuel supply hose) 20 derived from the refueling device main body 10, and a refueling nozzle (fuel supply nozzle) provided at the tip of the refueling hose 20. ) 30 and. A pump (liquid feeding device) 11 driven by a pump motor 12 and a flow meter 13 for measuring the amount of fuel discharged from the pump 11 are housed in the refueling device main body 10. The flow meter 13 is provided with a flow rate transmitter 15 that generates a flow rate pulse corresponding to the flow of oil and liquid for each unit flow rate (for example, every 0.01 L).

The suction port of the pump 12 is communicated with the inside of the underground oil storage tank (liquid storage tank) 2 via a suction port pipe 14 and an underground pipe (not shown). The discharge port of the pump 12 is communicated with the inflow port of the flow meter 13. The outlet of the flow meter 13 is communicatively connected to one end side of the swivel joint 17 to which the base end side of the oil supply hose 20 is connected to the other end side via the outlet pipe 16. As a result, in the illustrated refueling device 1, the fuel supply path in the main body for the refueling nozzle 30 is configured by the suction port pipe 14, the pump 12, the flow meter 13, and the outlet pipe 16, and the refueling nozzle 30 is formed by the refueling hose 20. The fuel supply path outside the main body is configured.

A hose joint unit 21 is provided in the middle of the refueling hose 20, and the refueling hose 20 is divided into a main body side hose portion 22 and a nozzle side hose portion 23. In the illustrated example, an embodiment in which the hose joint unit 21 is provided in the middle of the refueling hose 20 is shown, but the arrangement position of the hose joint unit 21 is not limited to this, and the base end and the tip of the refueling hose 20 are not limited to this. It may be provided in. The hose joint unit 21 is a hose on the main body side when an abnormally excessive tensile force acts on the refueling hose 20 due to a vehicle to be refueled starting while the refueling nozzle 30 is attached to the refueling port (fuel supply port). The portion 21a and the nozzle-side hose portion 21b are separated to prevent the refueling hose 20 from breaking, and fuel leaks from the main body-side hose portion 22 on the upstream side and the nozzle-side hose portion 23 on the downstream side of the hose joint unit 21. Functions as a safety joint to prevent.

Although not shown in FIG. 1, the refueling nozzle 30 is a valve mechanism 40 and a nozzle lever 31 that open and close the main valve 41 arranged in the liquid passage 35 in the nozzle body 32 according to the operation amount of the nozzle lever 31. A lever holding mechanism that can hold the operating position at one or a plurality of desired positions, and when the fuel liquid level in the supply target reaches the tip of the nozzle cylinder, the valve mechanism 40 is closed regardless of the valve opening operation state of the nozzle lever 31. It is equipped with an automatic valve closing mechanism (automatic full tank closing mechanism) 60, etc. for valve. The refueling nozzle 30 is rotatably connected to the tip end side of the refueling hose 20 via a swivel joint 18. The operator can open and close the main valve 41 of the valve mechanism 40 in the nozzle body 32 in response to the operation of the nozzle lever 31. By holding the nozzle lever 31 at a desired position of the lever holding mechanism, the operator can hold the valve opening amount (valve opening position) of the valve mechanism 40 at the valve opening amount corresponding to the desired position. Of these, the configuration related to the automatic valve closing mechanism 60 will be described in detail later.

As shown in FIG. 1, the refueling nozzle 30 is stored in a nozzle hook (nozzle accommodating portion) 25 provided in the refueling device main body 10 when it is not used for the refueling work (fuel supply work). The refueling nozzle 30 is taken out from the nozzle hook 25 by an operator during the refueling operation. The operator inserts the discharge pipe 33 at the tip of the refueling nozzle 30 into the refueling port of the vehicle or the like, operates the nozzle lever 31 to open the main valve 41 of the valve mechanism 40, and thereby enters the fuel tank of the vehicle or the like. It is possible to refuel. The nozzle hook 25 is provided with a nozzle switch 26 for detecting the removal and return of the refueling nozzle 30. Refueling information such as the amount of refueling during the refueling work is displayed on the refueling information display 120 provided on the refueling device main body 10 with the display surface facing the outside.

Further, in the refueling device main body 10, in addition to devices such as a pump 11 and a flow meter 13, a control device 100 that controls each part of the refueling device and a pump motor drive circuit that controls and drives the pump motor 12 based on the instructions of the control device 100. 110 is provided. The pump motor drive circuit 110 includes an inverter, and the drive rotation speed of the pump motor 12 is variably controlled by the inverter according to a supply amount instruction included in the instruction from the control device 100, and the refueling nozzle from the pump 11 The amount of fuel delivered to 30 is adjusted within a predetermined maximum discharge amount (for example, 40 L / min).

The control device 100 includes a microcomputer device including a memory, an input / output interface, and the like. The detection signal of the nozzle switch 26, the flow rate pulse output of the flow rate transmitter 15, and the like are input to the control device 100, and each part of the refueling device 1 is controlled based on these signal inputs.

Specifically, when the control device 100 detects the removal of the refueling nozzle 30 from the nozzle hook 25 based on the detection signal from the nozzle switch 26, it outputs a drive instruction of the pump motor 12 to the pump motor drive circuit 110 and pumps. The motor drive circuit 110 starts the pump motor 12 and starts driving at a preset normal discharge amount (for example, 40 L / min, which is the maximum use discharge amount). Further, when it is detected that the refueling nozzle 30 is stored in the nozzle hook 25 based on the detection signal from the nozzle switch 26, a stop instruction of the pump motor 12 is output to the pump motor drive circuit 110, and the pump motor drive circuit 110 outputs a stop instruction to the pump motor. The drive of 12 is stopped. In this way, the control device 100 controls the amount of fuel oil supplied from the pump 11 to the refueling nozzle 30 within the range of the maximum used discharge amount (in the illustrated example, within the range of 0 to 40 L / min). Functions as an oil supply control unit.

Further, the control device 100 calculates the amount of refueling during the refueling work based on the input of the flow rate pulse signal from the flow rate transmitter 15, and displays the refueling information such as the amount of refueling during the refueling work on the refueling information display 120. It also functions as a refueling calculation unit.

Then, the worker usually performs the refueling work (fuel supply work) for the fuel tank of the vehicle or the like by using the illustrated refueling device 1 as described below.

First, the operator takes out the refueling nozzle 30 from the nozzle hook 25 and inserts the discharge pipe 33 into the refueling port of a fuel tank of a vehicle or the like. Then, the operator opens the nozzle lever 31 of the refueling nozzle 30 to open the main valve 41 of the valve mechanism 40, and operates the nozzle lever 31 so that the discharge amount to the fuel tank becomes a desired amount. Hold while adjusting. As a result, in the refueling nozzle 30, the main valve 41 of the valve mechanism 40 is opened, and the fuel discharge corresponding to the operating state of the nozzle lever 31 is started from the discharge pipe 33. At that time, the pump motor 12, that is, the pump 11, is driven by the control device 100 to feed liquid based on the output of the nozzle take-out detection signal from the nozzle switch 26. Further, the fuel supply amount from the refueling nozzle 30 to the fuel tank of the vehicle or the like, that is, the refueling amount is calculated by the control device 100 based on the input of the flow rate pulse signal from the flow rate transmitter 15, and is displayed on the refueling information display 120. To. The fuel discharge from the refueling nozzle 30 is adjusted by changing the valve opening amount of the main valve 41 of the valve mechanism 40 according to the operation amount of the nozzle lever 31 by the operator.

On the other hand, when the fuel discharge from the refueling nozzle 30 to the fuel tank of a vehicle or the like is interrupted or terminated, the main valve 41 of the valve mechanism 40 is closed by the valve closing operation of the nozzle lever 31 or the operation of the automatic valve closing mechanism by the operator. It is done by doing. Therefore, when the operator finishes refueling the fuel tank of the vehicle or the like with a desired amount of fuel, the operator presses the nozzle lever 31 when the nozzle lever 31 remains in the valve opening operation state due to the operation of the automatic valve closing mechanism. After the valve closing operation, the refueling nozzle 30 is removed from the refueling port of the fuel tank of the vehicle or the like and stored in the nozzle hook 25. The control device 100 stops the liquid feeding drive of the pump motor 12, that is, the pump 11 based on the output of the nozzle storage detection signal from the nozzle switch 26.

FIG. 2 is a partial cross-sectional view of the nozzle body portion of the refueling nozzle shown in FIG. FIG. 2 is a partial cross-sectional view of the nozzle body 32, which is a view of the nozzle body 32 portion of the refueling nozzle 30 shown in FIG. 1 from the upper side to the lower side along the paper surface of FIG.

As shown in FIG. 2, a liquid passage 35 that communicates between the inflow port 34 and the discharge pipe 33 is provided in the nozzle body 32. The inflow port 34 is a connecting portion with the swivel joint 18. The liquid passage 35 is provided with a valve mechanism 40 for flowing and shutting off the flow of fuel in the liquid passage 35.

The valve mechanism 40 has a main valve 41 including an annular valve seat portion 42 formed on the inner peripheral wall of the liquid passage 35 of the nozzle body 32 and a valve body portion 43 that takes off and seats on the valve seat portion 42. In the illustrated example, the valve body portion 43 has a main valve body 44 that is detached and seated on the valve seat portion 42 to communicate and shut off the liquid passage 35, and a valve of the main valve body 44 that is detached and seated on the main valve body 44. It is composed of an auxiliary valve body 45 that communicates with and shuts off the body passage 46. A coil-shaped spring member 48 is interposed between the sub-valve body 45 of the valve mechanism 40 and the spring receiving member 47 mounted in the nozzle body 32. The spring member 48 urges the sub-valve body 45 so that the sub-valve body 45 is seated on the main valve body 44 and the main valve body 44 is further seated on the valve seat portion 42.

The valve shaft member 49 is composed of a valve shaft sleeve 50 and a valve shaft rod 52 that can move forward and backward in the sleeve hole 51 formed in the valve shaft sleeve 50. A main valve body 44 is attached to one end side of the valve shaft sleeve 50 in the axial direction. The main valve body 44 is attached to the valve shaft sleeve 50 so as to be in contact with and separated from the auxiliary valve body 45 integrally formed on the outer peripheral surface of the valve shaft sleeve 50 along the axial direction of the valve shaft sleeve 50. It is attached. On the other hand, one end of the valve shaft rod 52 is an insertion portion 53 capable of advancing and retreating in the sleeve hole 51 of the valve shaft sleeve 50, and the other end side is a stepped portion capable of contacting the other end surface of the valve shaft sleeve 50. It is a lever engaging portion 54 provided with. A nozzle lever 31 is engaged with the lever engaging portion 54, and a coil-shaped spring member 55 is provided between the lever engaging portion 54 and the nozzle body 32. The spring member 55 urges the valve shaft rod 52 along the axial direction so as to prevent the valve shaft rod 52 from exiting the sleeve hole 51. The urging force of the spring member 55 is set to be smaller than the urging force of the spring member 48. On top of that, the valve shaft sleeve 50 and the valve shaft rod 52 can be integrally moved along the axial direction by the engaging rod 61 of the automatic valve closing mechanism 60 when the automatic valve closing mechanism 60 is not operating. It is in a state of being connected to. Therefore, the valve shaft sleeve 50 and the valve shaft rod 52 are formed with an engaging hole 62 and an engaging groove 63 to which the engaging rod 61 can be engaged.

The automatic valve closing mechanism 60 includes a negative pressure chamber 66 and an atmospheric pressure chamber 67 formed in the nozzle body 32 and defined by the diaphragm 65, a negative pressure generating portion (not shown), and a liquid level detection port (not shown). The introduction passage 68 that communicates the negative pressure chamber 66 with the negative pressure generating portion and the liquid level detection port, and a guide member 69 that is integrally fixed to the diaphragm and supports the engaging rod 61. There is. An introduction passage 68 communicates with the negative pressure chamber 66 so that the negative pressure generated in the negative pressure generating portion can be introduced and the atmospheric pressure can be introduced from the liquid level detection port. .. The negative pressure generating portion is formed in a narrow portion of the fuel flow in the liquid passage 35 in the nozzle body 32, and a negative pressure is generated by the Venturi effect due to the fuel flow. For example, the negative pressure generating portion is provided in the valve seat opening of an automatic valve (not shown). The automatic valve is provided on the downstream side of the valve mechanism 40 in the liquid passage 35 to prevent fuel from dripping from the tip of the discharge pipe 33.

The liquid level detection port is composed of an opening (not shown) provided on the tip side of the discharge pipe 33, and the discharge pipe 33 is inserted into the refueling port of a fuel tank of a vehicle or the like during refueling work. The inside of the fuel tank can be blocked by the rising liquid level or foam level of the fuel. The atmospheric pressure chamber 67 is always maintained at atmospheric pressure. In the introduction passage 68, when the liquid level detection port is not blocked by the liquid level or the bubble surface of the fuel, the pressure in the negative pressure chamber 66 even if negative pressure is generated in the negative pressure generating portion. When the liquid level detection port is blocked by the liquid level or bubble surface of the fuel, the negative pressure generated in the negative pressure generating part is introduced into the negative pressure chamber 66. To do. The guide member 69 is configured to be movable in response to the displacement of the diaphragm 65, and the movement guides the engagement and disengagement of the engagement rod 61 with respect to the valve shaft rod 52. The guide member 69 is an engaging rod along the axial direction of the valve shaft sleeve 50 of the valve mechanism 40 and the valve shaft rod 52 between the valve opening position and the valve closing position of the valve body portion 43 (main valve 41). It has a guide hole (not shown) that allows the movement of 61. The engaging rod 61 is inserted into and supported by the guide hole. The diaphragm 65 and the guide member 69 have the engaging rod 61 in the engaging groove 63 of the valve shaft rod 52 by the coiled spring member 72 provided between the diaphragm 65 and the spring receiving member 71 mounted in the nozzle body 32. Always urged to engage.

In the automatic valve closing mechanism 60 configured in this way, during the refueling work, the liquid level detection port rises in the fuel tank while the discharge pipe 33 is inserted into the refueling port of the fuel tank of a vehicle or the like. When the surface or the bubble surface is closed, the negative pressure chamber 66 cannot compensate for the negative pressure generated in the negative pressure generating portion, and the chamber is in a negative pressure state. At that time, the diaphragm 65 bends and displaces against the urging force of the spring member 72 due to the differential pressure generated between the negative pressure chamber 66 and the atmospheric pressure chamber 67. The engagement rod 61 is disengaged from the valve shaft rod 52 by the movement of the guide member 69 linked to the displacement of the diaphragm 65. As a result, the valve shaft sleeve 50 can be moved and displaced along the axial direction independently of the valve shaft member 49, which is moved and displaced in conjunction with the operation amount of the nozzle lever 31, and is the main valve of the valve mechanism 40. The 41 is seated on the valve seat portion 42 by the urging force of the spring member 48. In this way, the automatic valve closing mechanism 60 closes the valve mechanism 40 by its operation when the fuel tank of the vehicle or the like becomes full during the refueling work, regardless of the valve opening operation state of the nozzle lever 31. To speak. The automatic valve closing mechanism 60 can prevent the fuel from being continuously supplied to the fuel tank of the vehicle or the like and overflowing from the fuel filler port even if the tank is full during the refueling operation.

Further, the nozzle body 32 of the refueling nozzle 30 is provided with a state detector 80. The state detector 80 is in a state immediately before the automatic valve closing mechanism 60 operates before the automatic valve closing mechanism 60 operates during fuel feeding from the pump 11 to the refueling nozzle 30. Is detected. In the case of the illustrated automatic valve closing mechanism 60, the state before the automatic valve closing mechanism 60 operates is the engagement rod of the automatic valve closing mechanism 60 in the state where the main valve 41 of the valve mechanism 40 is opened. It refers to a state in which at least a part of 61 is located in the engaging groove 63 of the valve shaft rod 52, and the valve shaft sleeve 50 and the valve shaft rod 52 are kept integrally connected. Further, before the automatic valve closing mechanism 60 still closes the valve, the state before the automatic valve closing mechanism 60 operates the valve closing operation is a state in which the main valve 41 of the valve mechanism 40 is opened. From the time when the diaphragm 65 of the automatic valve closing mechanism 60 starts to be displaced against the urging force of the spring member 72 due to the differential pressure generated between the negative pressure chamber 66 and the atmospheric pressure chamber 67, the valve shaft sleeve 50 and It refers to the state until just before the integrated connection state of the valve shaft rod 52 is released. That is, the state detector 80 reduces the pressure in the negative pressure chamber 66 to the extent that the integrated connection state of the valve shaft sleeve 50 and the valve shaft rod 52 is not released, in other words, the negative pressure is passed through the introduction passage 68. The moving displacement of the diaphragm 65 of the automatic valve closing mechanism 60, that is, the negative pressure chamber, indicates that the negative pressure from the negative pressure generating portion supplied to the chamber 66 has begun to be unable to be compensated by the atmosphere introduced from the liquid level detection port. It is detected directly from the negative pressure change of 66.

In the illustrated example, the state detector 80 includes a diaphragm 82, an optical sensor 83, and a spring receiving member 84. The diaphragm 82 forms a reference pressure chamber 81 defined as a negative pressure chamber 66 of the automatic valve closing mechanism 60 in the nozzle body 32.

The reference pressure chamber 81 is always maintained at atmospheric pressure, similarly to the atmospheric pressure chamber 67 of the automatic valve closing mechanism 60. The optical sensor 83 includes, for example, a detection end composed of a combination of a photolaser and a photodiode, and detects the proximity / separation of the diaphragm 82 with respect to the detection end. The proximity state in this case may include a contact state between the diaphragm 82 and the detection end of the optical sensor 83. The detection output of the optical sensor 83 is input to the control device 100 via a signal line 87 (not shown in FIG. 1) provided along the refueling hose 20. The spring receiving member 84 is provided in the negative pressure chamber 66 of the automatic valve closing mechanism 60, and is provided along the displacement direction of the diaphragm 65 in the automatic valve closing mechanism 60 by the guide member 86 provided in the nozzle body 32, that is, , The valve shaft rod 52 is movably supported along the engagement / disengagement direction with respect to the engagement groove 63. The spring receiving member 84 is constantly urged so as to be pressed against the diaphragm 65 by the coiled spring member 85 provided between the spring receiving member 84 in the nozzle body 32.

Therefore, in the illustrated state detector 80, the pressure receiving area of the diaphragm 65 and the magnitude of the urging force of the spring member 85 are related to the diaphragm pressure receiving area of the automatic valve closing mechanism 60 and the magnitude of the urging force of the spring member 72. By setting appropriately, the amount of engagement between the engagement rod 61 and the engagement groove 63 of the valve shaft rod 52 linked to the magnitude of the pressure in the negative pressure chamber 66 of the automatic valve closing mechanism 60 or the displacement of the diaphragm 65. The magnitude can be converted and detected corresponding to the magnitude of the detection signal of the optical sensor 83. That is, according to the state detector 80, during fuel feeding from the pump 11 to the refueling nozzle 30, the automatic valve closing mechanism 60 is closed before the automatic valve closing mechanism 60 is still closed. The state just before valve operation can be detected.

In the illustrated example. The state detector 80 is configured by using the diaphragm 65 and the optical sensor 83, but the specific configuration of the state detector 80 is not limited to this configuration. For example, a pressure sensor can be used to detect the pressure in the negative pressure chamber 66, a strain sensor can be used to detect the deformation of the diaphragm 65, and a liquid detection sensor can be used to generate fuel or fuel bubbles. It may be possible to detect that the fuel has adhered to the liquid level detection port or has started to invade from the liquid level detection port. As described above, regarding the specific configuration of the state detector 80, if it is possible to detect that the automatic valve closing mechanism 60 is in the state immediately before the valve closing operation, the specific configurations of the described embodiment and the modified example are described. Not limited to.

FIG. 3 is a flowchart showing a control configuration of refueling work in the refueling device of this embodiment. Next, based on FIG. 3, the fuel delivery control from the pump 11 to the refueling nozzle 30 performed by the control device 100 via the pump motor drive circuit 110 having an inverter during the refueling operation will be described.

When the power of the refueling device 1 is turned on, the control device 100 inputs the nozzle take-out detection signal, that is, the refueling nozzle 30 is nozzleed 25, depending on whether or not the detection signal of the nozzle switch 26 has changed from OFF to ON. It is monitored whether or not it has been taken out from (FIG. 3, step S10).

When the refueling nozzle 30 is taken out from the nozzle hook 25 and the refueling work is started (S10_Yes), the control device 100 performs a reset process at the start of a new refueling work (S15). In the reset process at the start of the refueling work, a zero reset of the counter that counts the flow rate pulse signal (flow rate pulse) and calculates the refueling amount, a display reset of the refueling information display 120, a reset of the additional refueling mode described later, etc. Is included.

Then, when starting a new refueling operation, the control device 100 sets the pump motor 12 as an operation mode of the pump 11 after the fuel discharge from the refueling nozzle 30 is started by the valve opening operation of the nozzle lever 31. Whether to operate in the daytime mode or the nighttime mode is set in advance (S20). The setting is whether or not the control device 100 uses its own clock function, for example, to include the current time within the preset daytime time range, or within the preset nighttime time range. It is performed by determining whether or not it is included. When the control device 100 is operated in the daytime mode, the control device 100 is within the range of the maximum used discharge amount (for example, within the range of 0 to 40 L / min) when the actual fuel discharge from the refueling nozzle 30 by the valve opening operation of the nozzle lever 31 is started. ), The pump operation in the daytime mode is performed in order to output the drive instruction of the pump motor 12 to the pump motor drive circuit 110 so that the pump 11 is operated with the preset normal discharge amount (for example, 40 L / min). Set (S30). Further, when the control device 100 operates in the night mode, the normal discharge amount (for example,) lower than the preset daytime mode operation at the actual start of fuel discharge from the refueling nozzle 30 by the valve opening operation of the nozzle lever 31 (for example). The pump operation in the night mode is set to output the drive instruction of the pump motor 12 to the pump motor drive circuit 110 so that the pump 11 is operated at 28 L / min, which is a 30% drop (S35). Therefore, at night, even if the nozzle lever 31 of the refueling nozzle 30 is not adjusted each time the refueling work is performed, the normal discharge amount becomes lower than that in the daytime, and the noise during the refueling work can be automatically reduced. It has become like.

Then, in this way, the control device 100 sets the operation mode of the pump 11 at the actual start of fuel discharge from the refueling nozzle 30 in advance for daytime / nighttime (S20 to S30), and then first idles the pump 11. A drive instruction of the pump motor 12 for operating in the operation mode is output to the pump motor drive circuit 110 (S40). As a result, after the refueling nozzle 30 is taken out from the nozzle hook 25 (S10_Yes), the discharge pipe of the refueling nozzle 30 is inserted into the refueling port of the fuel tank of a vehicle or the like, and the valve opening operation of the nozzle lever 31 is performed from the refueling nozzle 30. Until the actual fuel discharge is started (S50_Yes), the control device 100 operates the pump 11 in the idling operation mode.

Here, the idling operation mode is from the pump 11 as compared with the case of the pump operation in the daytime mode (S30, discharge amount 40 L / min) and the case of the pump operation in the nighttime mode (S35, discharge amount 28 L / min). This is an operation mode of the pump 11 in which the discharge amount (the flow rate of liquid sent from the pump 11 to the refueling nozzle 30) is lowered in advance. According to this idling operation mode, the driving power of the pump motor 12 can be suppressed and the refueling device 1 can be operated with energy saving as compared with the pump operation at the normal discharge amount.

The control device 100 starts the operation of the pump 11 in the idling operation mode in step S40 based on the removal from the nozzle hook 25 of the refueling nozzle 30, and then from the flow transmitter 15 attached to the flow meter 13 for each unit measured flow rate. Whether or not a flow rate pulse signal corresponding to the flow of fuel in (S50) is input, and an operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state from the state detector 80 provided in the refueling nozzle 30. Whether or not (S60) and whether or not the input interval of the flow rate pulse signal from the flow rate transmitter 15 exceeds the reference time set in advance for determining that the refueling work has been interrupted (S70). ) And whether or not the refueling nozzle 30 is housed in the nozzle hook 25 and the detection signal of the nozzle switch 26 has changed from ON to OFF (S80), and these monitoring are repeated at any time. , Control the operation of the pump 11.

Of these, when the flow rate pulse signal (individual flow rate pulse) is input from the flow rate transmitter 15 (S50_Yes), the control device 100 calculates and updates the refueling amount in the current refueling work, and the refueling amount at the present time, etc. The refueling information of is displayed on the refueling information display 120 (S52). Further, the control device 100 resets and starts the timing of the flow rate pulse input interval timer for measuring the input interval of the flow rate pulse signal from the flow rate transmitter 15, until the next flow rate pulse signal is input. The time counting of the input interval of the flow rate pulse signal is started (including restarting) (S54). Further, the control device 100 determines whether or not the drive instruction of the pump motor 12 for operating the pump 11 in the idling operation mode has been output to the pump motor drive circuit 110 most recently (S56), and has been output. If (S56_Yes), it is further determined whether or not the additional refueling mode described later is set (S57). Then, the control device 100 controls the operation mode of the pump 11 as follows based on the determination results of steps S56 and S57.

If the instruction to operate the pump 11 in the idling operation mode has been output to the pump motor drive circuit 110 most recently and the additional refueling mode is not set (S56_Yes, S57_No), the automatic valve closing mechanism 60 is still activated. This corresponds to a situation in which the nozzle lever 31 is opened and the actual fuel discharge from the refueling nozzle 30 is started / restarted in a situation where the additional refueling mode is not set. Therefore, the control device 100 changes the operation of the pump 11 in the current idling operation mode to the operation by either the day mode operation or the night mode operation set at the beginning of the refueling work in step S30 or S35. In addition, a drive instruction of the pump motor 12 for operating the pump 11 in either the daytime mode operation or the nighttime mode operation is output to the pump motor drive circuit 110 (S58). Such a situation in the refueling work includes a situation in which the discharge pipe 33 of the refueling nozzle 30 taken out from the nozzle hook 25 is inserted into a fuel tank of a vehicle or the like and the nozzle lever 31 is opened at the start of the refueling work. The nozzle lever 31 is closed before the automatic valve closing mechanism of the refueling nozzle 30 is activated to temporarily interrupt the fuel discharge from the refueling nozzle 30, and then the nozzle lever 31 is opened again to open the refueling nozzle 30. The situation where the fuel discharge from is restarted is applicable.

Further, when the drive instruction of the pump motor 12 for operating the pump 11 in the idling operation mode has been output to the pump motor drive circuit 110 most recently and the additional refueling mode is set (S56_Yes, S57_Yes), The control device 100 outputs a drive instruction of the pump motor 12 to the pump motor drive circuit 110 so that the pump 11 operating in the current idling operation mode operates the pump 11 in the water hammer suppression operation mode (S59). .. In the water hammer suppression operation mode, the discharge amount from the pump 11 is lower than that in the daytime mode operation (S30) and the nighttime mode operation (S35), which hinders the operation of the automatic valve closing mechanism 60. The discharge amount (for example, 10 L / min) that can suppress the momentary and sudden pressure rise starting from the valve mechanism 40 of the refueling nozzle 30 by the water hammer caused by the operation of the automatic valve closing mechanism 60 is set in advance. It is done. In such a situation in the refueling work, after the automatic valve closing mechanism 60 of the refueling nozzle 30 is operated, the nozzle lever 31 is temporarily closed, and the valve mechanism is via the engaging rod 61 of the automatic valve closing mechanism 60. This corresponds to a situation in which the valve shaft sleeve 50 of 40 and the valve shaft rod 52 are restored to be integrally connected, and then the nozzle lever 31 is opened again to additionally refuel a fuel tank of a vehicle or the like.

Further, when the drive instruction of the pump motor 12 for operating the pump 11 in the idling operation mode has not been output to the pump motor drive circuit 110 most recently (S56_No), or the pump for operating the pump 11 in the idling operation mode. Even if the drive instruction of the motor 12 has been output to the pump motor drive circuit 110 most recently, if the additional refueling mode has already been set (S56_Yes, S57_Yes), the operation mode of the pump motor 12 indicated most recently (S56_Yes, S57_Yes). The current operation of the pump 11 is continued without changing any of the daytime mode operation, the nighttime mode operation, and the water hammer suppression operation). Such a situation in the refueling work corresponds to a situation in which the actual fuel is continuously discharged from the refueling nozzle 30.

On the other hand, when the state detector 80 inputs an operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state (S60_Yes), the control device 100 determines whether or not the additional refueling mode is set. Confirm (S61). Then, the control device 100 controls the operation mode of the pump 11 as follows based on the determination results of steps S60 and S61.

When the additional refueling mode is not set (S61_No), the drive instruction of the pump motor 12 is output to the pump motor drive circuit 110 so that the pump 11 is operated in the water hammer suppression operation mode (S62). In the water hammer suppression operation mode, the discharge amount from the pump 11 is lower than that in the daytime mode operation (S30) and the nighttime mode operation (S35), which hinders the operation of the automatic valve closing mechanism 60. The discharge amount (for example, 10 L / min) that can suppress a momentary and sudden pressure rise starting from the valve mechanism 40 of the refueling nozzle 30 by the water hammer caused by the operation of the automatic valve closing mechanism 60 is set in advance. There is.

On the other hand, when the operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state is not input from the state detector 80 (S60_No), or when the state detector 80 operates the automatic valve closing mechanism 60. Even if an operation imminent signal indicating that the state is imminent is input, if the additional refueling mode is already set (S60_Yes, S61_Yes), the operation mode of the pump motor 12 indicated most recently is not changed. , Continue the operation of the pump 11 in the current operation mode. As a result, when the operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state is not input from the state detector 80 (S60_No), the operation of the pump 11 (daytime mode operation) instructed most recently is performed. , Night mode operation, water hammer suppression operation, idling operation) will be continued. Further, even if an operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state is input from the state detector 80, if the additional refueling mode is already set (S60_Yes, S61_Yes), the latest The operation of the instructed pump 11 (water hammer suppression operation) will be continued.

In such a situation in the refueling operation in which the instruction to operate the pump 11 in the water hammer suppression operation mode is issued in step S62, the pump 11 is normally operated (operated in either the daytime mode operation or the nighttime mode) and the refueling nozzle. This corresponds to a situation in which the liquid level or the bubble level in the fuel tank of a vehicle or the like is about to operate the automatic valve closing mechanism 60 in a state where the actual fuel is discharged from the 30.

On the other hand, in the control device 100, when the input interval of the flow rate pulse signal from the flow rate transmitter 15 exceeds the reference time preset for determining the refueling stop (S70_Yes), the nozzle lever 31 of the refueling nozzle 30 It is determined that the main valve 41 of the valve mechanism 40 is closed by the valve closing operation or the operation of the automatic valve closing mechanism 60, and the refueling work is interrupted / stopped. Then, when the input interval of the flow rate pulse signal exceeds the reference time and the refueling work is interrupted / stopped, the control device 100 further instructs the pump motor 12 to operate the pump 11 in the water hammer suppression operation mode. Is determined whether or not it has been output to the pump motor drive circuit 110 most recently (S72), and if the instruction to operate the pump 11 in the water hammer suppression operation mode has been output most recently (S72_Yes), it is added. Further determination is made as to whether or not the refueling mode is set (S73). Then, the control device 100 controls the operation mode of the pump 11 as follows based on the determination results of steps S72 and S73.

If the drive instruction of the pump motor 12 for operating the pump 11 in the water hammer suppression operation mode has not been output to the pump motor drive circuit 110 most recently (S72_No), the pump 11 is currently in the daytime mode operation and the nighttime mode. The control device 100 determines that the refueling operation is interrupted because the main valve 41 of the valve mechanism 40 is closed by the valve closing operation of the nozzle lever 31 of the refueling nozzle 30 in the state of being operated by any of the operations. A drive instruction of the pump motor 12 is output to the pump motor drive circuit 110 so that the pump 11 is operated in the idling operation mode (S75).

Further, if the instruction to operate the pump 11 in the water hammer suppression operation mode has been output to the pump motor drive circuit 110 most recently and the additional refueling mode is not set (S72_Yes, S73_No), the pump 11 is currently water hammered. After operating in the hammer suppression operation mode and outputting an operation imminent signal indicating that the automatic valve closing mechanism 60 is in the imminent operation state from the state detector 80 in a state where the additional refueling mode is not set, the refueling nozzle 30 This corresponds to a situation in which the main valve 41 of the valve mechanism 40 is closed by the valve closing operation of the nozzle lever 31 or the operation of the automatic valve closing mechanism 60, and the refueling work is interrupted.

In this embodiment, when the control device 100 subsequently restarts the fuel discharge from the refueling nozzle 30 based on the lever operation of the nozzle lever 31 of the refueling nozzle 30, the fuel for the vehicle or the like to be fueled is restarted. As for the amount of liquid in the tank, since the pump 11 is currently operated in the water hammer suppression operation mode (S60_Yes, S61_No, S62 described above), the automatic valve closing mechanism 60 is about to operate from the state detector 80. Since the amount of liquid is close to full when the operation imminent signal indicating that the operation is imminent is input, it is judged that it is preferable to restart the operation in the water hammer suppression operation mode, for example, when the discharge flow rate from the pump 11 is low. It has become. Therefore, after that, when the fuel discharge from the refueling nozzle 30 is restarted based on the lever operation of the nozzle lever 31 of the refueling nozzle 30 and additional refueling for accurate filling is performed, the refueling nozzle 30 is used. When the fuel discharge is restarted and the flow pulse signal is input (S50_Yes, S56_Yes described above), the additional refueling mode for operating the pump 11 in the water hammer suppression operation mode is set (S50_Yes, described above). S56_Yes, S57_Yes, S59), after setting the additional refueling mode (S74), the drive instruction of the pump motor 12 for operating the pump 11 in the idling operation mode is output to the pump motor drive circuit 110 (S75).

Further, if the instruction to operate the pump 11 in the water hammer suppression operation mode has already been output to the pump motor drive circuit 110 and the additional refueling mode is set (S72_Yes, S73_Yes), the additional refueling mode has already been set. Since this is done, the drive instruction of the pump motor 12 for operating the pump 11 in the idling operation mode is output to the pump motor drive circuit 110 (S75).

On the other hand, in the control device 100, the input interval of the flow rate pulse signal from the flow rate transmitter 15 does not exceed the reference time preset for determining the refueling stop (S70_No), and the refueling nozzle 30 is used. In the state where the actual fuel discharge is continued, the operation mode of the pump motor 12 (either daytime mode operation, nighttime mode operation, or water hammer suppression operation), which is instructed most recently, is not changed and is currently The operation of the pump 11 of the above is continued.

In this embodiment, the idling operation mode is the refueling nozzle 30 interrupted by the valve closing operation of the nozzle lever 31 as described in the processing (S50 to S59) when the flow rate pulse signal is input from the flow rate transmitter 15. When the fuel discharge from the discharge pipe 33 is restarted by the valve opening operation of the nozzle lever 31 (S50_Yes, S57_Yes), the operation returns to the daytime mode operation or the nighttime mode operation instructed at the beginning of the refueling work (S58). As an operation mode on the premise of the above, the operation mode is different from the water hammer suppression operation mode. This is because the amount of liquid in the fuel tank to be supplied differs between the idling operation mode and the water hammer suppression operation mode, and the progress of the refueling work is detected by distinguishing the timing. It depends on what you can do.

Therefore, in this embodiment, the discharge amount from the pump 11 (the flow rate of the liquid sent from the pump 11 to the refueling nozzle 30) in the idling operation mode is lower than that in the water hammer suppression operation mode (pump motor with a discharge amount of 0). It is also possible to set the drive stop state of 12 and the extremely low discharge amount at which the operation of the automatic valve closing mechanism 60 is not guaranteed). As a result, when the refueling work is interrupted when the automatic valve closing mechanism 60 is not in the state of imminent operation, the pump 11 is operated in the idling operation mode while the refueling work is interrupted. Energy saving of 1 can be achieved. Further, when the refueling work is resumed, the operation of the pump 11 returns to the operation in the daytime mode or the operation in the nighttime mode instructed at the beginning of the refueling work in a situation other than the additional refueling work. There is no problem such as insufficient discharge flow rate from the refueling nozzle 30. Further, in the situation of additional refueling, since the operation is returned to the water hammer suppression operation mode, it becomes easy to adjust the discharge flow rate from the refueling nozzle 30 by operating the nozzle lever 31 of the refueling nozzle 30 at the time of additional refueling.

On the other hand, when the control device 100 detects that the refueling nozzle 30 is housed in the nozzle hook 25 and the detection signal of the nozzle switch 26 has changed from ON to OFF (S80_Yes), it is assumed that the refueling work this time has been completed. , The drive instruction of the pump motor 12 is output to the pump motor drive circuit 110 (S82). Then, the control device 100 returns to the monitoring (S10) of whether or not the refueling nozzle 30 has been taken out from the nozzle hook 25, and monitors the start of the next refueling operation.

The refueling device 1 according to the present embodiment has the following features by the control device 100 performing fuel delivery control from the pump 11 to the refueling nozzle 30 as shown in FIG.
(1) The automatic valve closing mechanism 60 of the refueling nozzle 30 is of the automatic full tank closing mechanism (automatic valve closing mechanism) because the pump 11 is always operated during the operation in the water hammer suppression operation mode. It is possible to suppress a momentary and sudden increase in pressure starting from the valve mechanism of the fuel supply nozzle due to the operation.
(2) The pump is in a situation where the main valve 41 of the refueling nozzle 30 is closed and the fuel discharge from the refueling nozzle 30 is interrupted / stopped during the refueling operation in which the refueling nozzle 30 is taken out from the nozzle hook 25. Since the eleven is operated in the idling operation mode, the driving power of the pump motor 12 can be suppressed and the refueling device 1 can be operated with energy saving.
(3) Since the pump 11 is operated in the water hammer suppression operation mode, the additional refueling work after the operation of the automatic valve closing mechanism 60 of the refueling nozzle 30 is easily performed.

Next, the operation and effect of the refueling device of this embodiment will be described with reference to FIGS. 4 and 5.
FIG. 4 is a characteristic explanatory view of the refueling work performed by using the refueling device of this embodiment.
FIG. 5 is a characteristic explanatory diagram of a refueling operation performed using a conventional refueling device as a comparative example.

The refueling work was performed under the following working conditions.
* Regardless of whether the refueling work using the refueling device 1 of this embodiment or the refueling work using the conventional refueling device is performed, the same fuel liquid type is used, and the fuel tank to be supplied is the fuel tank of the vehicle. The same reference container equipped with a fuel supply port (fuel supply port) imitating the above was used.
* In both the refueling device 1 of this embodiment and the conventional refueling device, the amount of fuel supplied from the pump 11 at the start of the refueling work to the refueling nozzle 30 was 40 L / min.
* In both the refueling device 1 of this embodiment and the conventional refueling device, each part of the automatic valve closing mechanism was adjusted so that the pressure in the negative pressure generating chamber in which the automatic valve closing mechanism operates was -2.5 kPa.
* Regarding the refueling device 1 of this embodiment, in the state detector 80, when the pressure in the negative pressure generating chamber 66 of the automatic valve closing mechanism 60 reaches -1.0 kPa, the automatic valve closing mechanism 60 is in a state just before operation. After adjusting to output the imminent operation signal, the drive frequency of the pump motor is changed from 50 Hz to 10 Hz, and the amount of fuel supplied from the pump 11 to the refueling nozzle 30 is 8. It was set to 4 L / min (required time for deceleration of rotation speed: 0.1 sec).

As a result of the refueling work for the reference container of the refueling device 1 and the conventional refueling device of this embodiment, the following actions and effects could be verified.
* Whereas the water hammer when the automatic valve closing mechanism of the conventional refueling device is operating is 0.90 MPa, the water hammer when the automatic valve closing mechanism 60 of the refueling device 1 of this embodiment is operating is 0. It could be reduced to 18 MPa.
* While the amount of fuel supplied to the reference container when the automatic valve closing mechanism of the conventional refueling device is operating was 8.86L, the standard when the automatic valve closing mechanism 60 of the refueling device 1 of this embodiment is operating. The amount of fuel supplied to the container was 10.02 L, the influence of bubbles generated in the container during the refueling work was reduced, and more accurate full tank refueling was possible.

From the above, according to the refueling device 1 of the present embodiment, a momentary and rapid pressure increase starting from the valve mechanism of the fuel supply nozzle due to the operation of the automatic full tank closing mechanism (automatic valve closing mechanism) is performed. Since it can be suppressed, it is possible to suppress the cause of unexpected deterioration in the functional reliability and durability of the equipment and parts arranged on the upstream side of the fuel supply nozzle. As a result, it is possible to improve the functional reliability performance and maintenance performance of the fuel supply device itself.

In addition, when applied to a self-service gas station, after the full tank refueling work is completed, the automatic full tank closing mechanism is activated and the main valve of the valve mechanism is closed, so the nozzle lever Safety is achieved when the valve is forgotten to be closed.

1 Refueling device (fuel supply device), 2 Underground oil storage tank (liquid storage tank),
10 Refueling device body (refueling device housing), 11 Pump (liquid feeding device),
12 Pump motor (drive source for liquid transfer equipment), 13 Flowmeter,
15 Flow transmitter, 16 Outlet piping,
20 Refueling hose (fuel supply hose), 25 Nozzle hook (nozzle storage),
26 Nozzle switch, 30 Refueling nozzle (fuel supply nozzle),
31 Nozzle lever, 32 Nozzle body, 33 Discharge pipe,
34 inlet, 35 liquid passage, 40 valve mechanism, 41 main valve,
49 Valve shaft member, 50 Valve shaft sleeve, 51 Sleeve hole,
52 valve shaft rod, 53 insertion part, 54 lever engagement part,
60 Automatic valve closing mechanism, 61 Engagement rod, 62 Engagement hole,
63 Engagement Groove, 65 Diaphragm, 66 Negative Pressure Chamber,
67 Atmospheric pressure chamber, 68 Introductory passage, 69 Guide member,
71 Spring member, 72 Spring member, 80 State detector,
81 reference pressure chamber, 82 diaphragm, 83 optical sensor,
84 spring receiving member, 85 spring member, 86 guide member,
87 signal line.

Claims (2)

A valve mechanism that adjusts the amount of fuel discharged from the nozzle cylinder tip according to the amount of operation of the nozzle lever, and a negative pressure chamber and an atmospheric pressure chamber when the fuel liquid level in the supply target reaches the nozzle cylinder tip or its vicinity. An automatic valve closing mechanism that displaces the diaphragm that defines both chambers by the differential pressure generated between them, and closes the valve mechanism regardless of the valve opening operation state of the nozzle lever in conjunction with the displacement of the diaphragm. With a fuel supply nozzle,
A liquid feeding device that feeds the fuel stored in the liquid storage tank to the fuel supply nozzle, and
It is a fuel supply device equipped with
A drive adjusting means for adjusting the drive of the drive source of the liquid feed device according to the fuel feed amount to the fuel supply nozzle in order to adjust the fuel feed amount from the liquid feed device to the fuel supply nozzle.
A state detector that detects that the automatic valve closing mechanism is about to close the valve during fuel feeding from the liquid feeding device to the fuel supply nozzle.
Based on the detection output of the state detector, the drive adjusting means is instructed to reduce the amount of fuel fed from the liquid feeding device to the fuel supply nozzle compared to before the detection. Drive control means and
A fuel supply device equipped with. The fuel supply device according to claim 1, wherein the state detector detects whether or not the automatic valve closing mechanism is in a state immediately before the valve closing operation is performed from a change in negative pressure in the negative pressure chamber.

Images