JPH0767958B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention automatically determines the type of fuel oil in a fuel tank of an automobile, and when it matches the type of fuel oil of a refueling device, BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device capable of refueling, and more specifically, to a flow passage configuration suitable for oil type determination in a liquid supply device of a type in which a plurality of nozzles are connected to one oil supply pump.

(Prior Art) There are two types of automobiles, one that uses gasoline as its fuel and the other that uses light oil. If different fuels are used, the engine will be seriously hindered.

For this reason, prior to the start of refueling, the vapor in the fuel tank of the automobile is sucked and guided to the gas sensor, the type of oil in the fuel tank is discriminated, and the type of fuel in the vehicle's fuel tank and the fuel oil to be refueled There has been proposed an oil supply device in which an oil supply pump is operated to make an oil supply operation possible only when the type matches (Japanese Patent Laid-Open No. 199900-199900).

On the other hand, in order to miniaturize the refueling device, the discharge port of one refueling pump is branched into a plurality of flow paths, and a refueling nozzle is connected to each flow path through a flow meter and the flow meter of each flow path is connected. An oil supply device has been proposed in which a stop valve is connected to the inlet side.

According to such an oil supply device, at least when the oil supply nozzle is removed from the nozzle hook, the pump motor is operated, and the control valve connected to the removed nozzle is opened so that the oil can be supplied, It is possible to prevent an unexpected situation by closing the flow path where the nozzle is not removed by the control valve.

However, when refueling is completed and the nozzle is returned to the nozzle hook, because the control valve is closed while the pump motor is still rotating, the nozzle hose keeps the pressure from the residual fuel oil and the nozzle hook is still in the nozzle hook. Will be held in.

On the other hand, in the oil supply device equipped with the oil type determination, the nozzle lever also serves to introduce the vapor gas into the oil type determination means in order to maintain the operability. If it remains, it will flow out by pulling up the lever, and the vapor of this will be sucked to determine the type of oil, and there is the inconvenience of making a determination error.

(Problems to be Solved by the Invention) The present invention has been made in view of such circumstances, and an object of the present invention is to provide an oil supply device in which a plurality of oil supply nozzles are connected to one pump. An object of the present invention is to provide an oil supply device having a novel flow path configuration for surely determining the oil type.

(Means for Solving the Problem) In order to solve such a problem, in the present invention, the discharge port of the oil supply pump is divided into a plurality of flow paths, and each flow path is mainly connected via a control valve and a flow meter. A liquid supply mechanism that connects a fuel supply nozzle that controls the discharge of liquid by opening and closing a valve, and a through hole that communicates with the inflow side of the fuel supply pump in the flow path that connects the flow meter and the control valve, and one end To the tip of the nozzle through a stop valve that opens and closes in conjunction with the opening and closing of the main valve. And a control means for opening the control valve to enable refueling when the oil type of the vehicle fuel tank matches with the signal from the oil type determining means. .

(Advantageous Effects of the Invention) When refueling is completed, the control valve is closed to stop the supply of fuel oil to the refueling nozzle. It is possible to prevent the fuel oil from being discharged to the inflow side of the oil supply pump through the fuel supply pump and discharged during the next fuel oil determination operation.

(Example) Therefore, the details of the present invention will be described below based on an illustrated example.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 denotes an oil supply pump driven by a pump motor 2, which centrifuges the fluid discharged from a discharge port 3 a of a pump body 3. A gas-liquid separation device 4 that separates a liquid component and a gas-containing component such as bubbles by force, and a liquid suction component that separates only the liquid component from the gas-liquid component discharged from the gas-liquid separation device 4.
It is configured by providing a gas-liquid separation chamber 5 for refluxing to 3b.
The discharge port 4a of the gas-liquid separator 4 is connected to a branch pipe 6 to form a plurality of flow paths 7 and 8. These respective flow paths 7 and 8 are
Flowmeters 11 and 12 are connected via control valves 9 and 10, respectively, and oil supply nozzles 15 and 16 are connected to the discharge ports of the flowmeters 11 and 12 via nozzle hoses 13 and 14, respectively.

The conduits 17, 18 connecting the control valves 9, 10 and the flow meters 11, 12 are
Desirably, as shown in FIG. 2, a part of the pipe wall is arranged horizontally and a through hole is formed in the upper pipe wall, for example, a diameter of 0.5.
Through holes 20 and 21 of about 0.8 mm are provided, and the through holes 20 and 21 are provided on the inflow side of the oil supply pump 1, in this embodiment, the oil supply pump 1 via the gas-liquid separation chamber 5 attached to the oil supply pump 1. Is connected to the inflow side of. When the gas-liquid separation chamber 5 is interposed, the bypass pipes 22 and 23 are preferably connected to a position below the liquid level L.

25 and 26 are gas sensors for determining the type of oil. One end is connected to the negative pressure / positive pressure generating means 27, 28 by a conduit, and the other end is connected to the air tubes 29, 30 along the nozzle hoses 13, 14. It is extended to the fuel nozzle. These air tubes
As shown in FIG. 3, the other ends of 29 and 30 are nozzle levers.
It is communicated with a vapor suction port 33 provided in the vicinity of the tip of the nozzle cylinder tip through a stop valve 32 interlocking with 31. In the figure, reference numeral 40 is an atmosphere open pipe communicating with the space of the gas-liquid separation chamber 5, and 41 is a float valve for disconnecting the communication with the suction port 3b of the pump 3 when the liquid level drops below a specified value. Further, reference numeral 53 in the drawing denotes a display device for displaying the liquid supply amount by signals from the flow rate pulse transmitters 11a and 12a provided in the flowmeters 11 and 12, respectively.

In this embodiment, when the nozzle 15 is removed from the nozzle hook and the nozzle switch 50 is turned on, the control device 52 activates the negative pressure / positive pressure generating means 27 attached to the nozzle 15 so that the air tube 29 is stored. Apply negative pressure. Next, when the cylinder tip of the fueling nozzle is inserted into the fuel tank of the automobile and the nozzle lever 31 is pulled, the main valve 55 is opened, the stop valve 32 is opened by the lever 31, and the vapor suction port 33 is provided inside the automobile tank. The vapor is sucked by the gas sensor 25. When a predetermined time has elapsed, the control device 52 takes in a signal from the gas sensor 25 and determines the type of fuel oil in the vehicle tank.

If it matches the oil type registered in advance, the control device
52 operates the pump motor 2 to drive the oil supply pump, opens the control valve 9 and sends the fuel oil to the nozzle 15,
Start refueling. On the other hand, fuel oil is discharged from the through hole 20 provided in the conduit 17 and passes through the bypass pipe 22 to refuel the pump 1.
However, since the amount is extremely small, it does not slow down the oil supply speed, and since it returns to the inside of the gas-liquid separation chamber 5, it will return to the inside of the gas-liquid separation chamber 5. It does not generate unnecessary air bubbles.

Further, in this embodiment, since the through hole 20 is provided in the upper portion of the conduit 17, even if foreign matter such as dust is mixed in the fuel oil due to some inconvenience, the foreign matter does not pass through the through hole 20. Difficult to adhere to. If the result of the oil type determination does not match, the control device 52 activates the alarm 54 to call attention.

The control device 52 is a negative pressure / positive pressure generating means according to the refueling operation.
Positive pressure is generated from 27 and air is supplied to the air tube 29. As a result, the gas sensor 25 is scavenged by the air and is discharged to the atmosphere from the vapor suction port 33 of the nozzle 15 through the air tube 29, and the fuel oil being refueled is prevented from entering the gas sensor 25 and the air tube 29. .

When the amount of refueling reaches a predetermined value and the lever 31 is pulled down in this way, the main valve 55 closes and refueling stops. Next, the nozzle 15 is returned to the nozzle hook and the nozzle switch 50
When it becomes F, the controller 52 stops the pump motor 2,
The control valve 9 is closed.

On the other hand, the liquid pressure of the fuel oil trapped in the nozzle hose 13 due to the closing of the main valve of the nozzle 15 and the closing of the control valve 9 is measured by the flow meter.
It returns to the conduit 17 via 11 and is quickly escaped from the through hole 20 of the conduit 17 to the gas-liquid separation chamber 5 of the oil supply pump 1 via the bypass pipe 22.

As a result, even if the nozzle lever is pulled up to determine the oil type at the time of the next refueling and the main valve 55 of the nozzle 15 is opened, the remaining fuel oil is not discharged, and therefore the fuel tank of the vehicle is The vapor of the fuel oil contained in the gas sensor can be sucked into the gas sensor.

In this embodiment, the conduits 17 and 18 connecting the control valves 9 and 10 and the flowmeters 11 and 12 are connected to the inflow side of the oil supply pump via the gas-liquid separation chamber. The present invention is not limited to this, and the same effect can be obtained by bypassing the conduits 17 and 18 directly to the inflow side of the oil supply pump 3 at a flow rate that does not reduce the oil supply efficiency.

Further, since the control valve is opened after the gas detector detects the vapor of the fuel oil and the oil types match, one nozzle is not fed to the other nozzle side during refueling, Even if the nozzle lever is pulled up to detect the vapor, the fuel oil is not discharged.

(Effects of the Invention) As described above, in the present invention, the discharge port of the oil supply pump is divided into a plurality of flow paths, each flow path is provided with a stop valve on the discharge port side, and a flow meter on the fuel supply nozzle side. In addition to the connection, the conduit connecting the flow meter and the control valve was provided with a through hole that communicates with the inflow side of the refueling pump, so the fuel oil trapped in the nozzle hose by closing the control valve after refueling operation. Can be released to the gas-liquid separation chamber, and when the lever is pulled up to determine the oil type, discharge of fuel oil due to the remaining hydraulic pressure can be prevented and a reliable oil type determination can be performed. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an apparatus showing an embodiment of the present invention, FIG. 2 is a diagram showing a structure of a conduit connecting a control valve and a flow meter, and FIG.
The figure is a cross-sectional view of a main part showing a main part of a fueling nozzle. 1 ... Oil supply pump, 2 ... Pump motor 3 ... Pump body, 4 ... Gas-liquid separation device 5 ... Gas-liquid separation chamber, 6 ... Branch pipe 9, 10 ... Control valve, 11, 12 ... Flow meter 13, 14 …… Nozzle hose 15, 16 …… Refueling nozzle 17, 18 …… Conduit, 20, 21 …… Through hole 25, 26 …… Gas sensor 27, 28 …… Negative pressure / positive pressure generating means 29, 30 …… Air tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-1-199900 (JP, A) JP-A-2-98597 (JP, A) JP-A-2-109897 (JP, A)

Claims (1)

[Claims] 1. A discharge port of an oil supply pump is divided into a plurality of flow paths, and each flow path is connected with an oil supply nozzle for controlling the discharge of liquid by opening and closing a main valve through a control valve and a flow meter.
A liquid feeding mechanism having a through hole communicating with the inflow side of the oil supply pump in a flow path connecting the flow meter and the control valve, and a negative pressure generating means is connected to one end, and gas detection is performed in the middle of the flow path. Means for opening the other end of the air tube provided with means at the tip of the nozzle through a stop valve that opens and closes in conjunction with opening and closing of the main valve, and a signal from the oil type determining means A refueling device comprising: a control means for opening the control valve to enable refueling when the types of oil in a vehicle fuel tank match.