JPH0444993A - Oil supplier with oil type discriminating function - Google Patents

Abstract

PURPOSE:To prevent wrong oil supply due to a mistake of discrimination by a method wherein oil cannot be supplied when vapor is detected within a prescribed time period after an oil supply nozzle is taken from a nozzle hanger. CONSTITUTION:When an oil supply nozzle 20 is taken from a nozzle hanger 8, a nozzle switch SW turns ON and it becomes vacuum inside of a vapor duct 12 which is connected to a jetting part 10J of an air duct 10. For starting oil supply, the oil supply nozzle 20 is inserted into an oil supply port of an automobile and a lever 22 is pulled. In this instance, if existence of gasoline is detected by a gas sensor GS before elapse of a prescribed time period T1, for example, 3 seconds during which air sucked before the oil supply nozzle 20 is inserted into the oil supply port of the automobile reaches a gas sensor room 13, that is, when gasoline attaching to a cylindrical tip part 21 of the oil supply nozzle 20 at a preceding full tank oil supply is not removed completely, a controller 5 urges attention by operating an alarm 7 to make an operator hang the oil supply nozzle 20 on the nozzle hanger 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a refueling device that determines the type of fuel oil to be refilled based on the fuel oil vapor remaining in the fuel tank of an automobile. More specifically, the present invention relates to a fuel supply device that prevents detection errors caused by detecting fuel oil vapor remaining in a path on the detection side.

(Prior Art) There are two main types of fuel oil for automobiles: diesel oil and gasoline, and if you refuel with the wrong type of oil, it will cause problems for the engine.

For this reason, there is a device in which a vapor suction port is provided at the tip of the discharge pipe of the refueling nozzle, and the gas sucked through the port is detected by a gas sensor installed on the main body of the refueling device to determine the type of oil in the fuel tank. This was proposed in Japanese Patent Publication No. 62-22879.

However, when a fuel tank MIM having such an oil type discrimination function is used to fill a car's fuel tank to full, the tip of the tip of the fuel nozzle comes into contact with gasoline in the fuel tank and becomes wet.

Gasoline evaporates relatively easily in the crotch, but during busy periods, it may be necessary to refuel before the gasoline adhering to the tip of the cylinder dries out.
Even when a refueling nozzle is inserted into a fuel tank using light oil, gasoline adhering to the tip of the discharge pipe may be detected.In addition to this, such detection errors may also occur when the scavenging air in the vapor suction pipe is detected after refueling. This problem also occurs when the next refueling is performed without properly refueling, and the problem still remains that the inconvenience caused by incorrect refueling cannot be completely prevented.

(Problems to be Solved by the Invention) The present invention has been made in view of these problems, and its purpose is to prevent detection errors from occurring by detecting the state of the refueling nozzle prior to refueling. An object of the present invention is to provide a new oil supply device I that prevents the above problems.

(Means for Solving the Problems) That is, the present invention provides a refueling device having an oil type discrimination function to achieve the above problems, and has a means for detecting vapor of fuel oil, and has a means for detecting fuel oil vapor at the tip of a refueling nozzle. a conduit opened to the duct, a suction means that causes a bar of suction to the conduit in conjunction with the operation of removing the refueling nozzle from the nozzle hook, and a detection means that outputs an output within a certain period of time after the start of operation of the suction means. and means for disabling refueling based on a vapor detection signal from the fuel tank.

(Function) With this configuration, immediately after the suction means starts operating, the fuel in the fuel tank is detected by detecting the vapor attached to the outer peripheral surface of the tip of the refueling nozzle and the vapor remaining in the vapor suction pipe. To prevent a discrimination error such as discriminating oil as lint, and to prevent erroneous oil supply caused by this discrimination error.

(Example) Therefore, the illustrated embodiment will be explained below.

FIG. 1 shows an oil supply device which is an embodiment of the present invention.

Figure 7: Reference numeral 1 is a refueling pump that supplies fuel in an underground tank to a refueling nozzle 20, which is connected to one end of a refueling hose 3 via a flow meter 2. A flow rate pulse transmitter 4 is attached thereto, and the signal from this is converted into a refueling amount by a control bag M5 and displayed on a display 6.

Reference numeral 10 denotes an air conduit connected at one end to the compressed air supply source 11, and this air conduit includes a normally closed first valve V and a normally open first valve V in order from the compressed air supply source 11 side. Two valves v2 are arranged, and a first valve V and a second valve V2 of this air conduit 1o are arranged.
Between the valve V2, one end or the cylinder tip 21 of the oil supply nozzle 20 is connected.
A vapor conduit 12 opened at the tip is connected with a gas sensor chamber 13 interposed in the middle.

The first and second valves V, , and V2 are each configured as a solenoid valve operated by a signal from the control bag N5, and as shown in FIG. By opening this 8, the jet section 10 of the air conduit 10
The inside of the vapor conduit 12 connected to J is made negative pressure, and the vacuum suction action of the vapor is applied to it.The first valve + is energized to open it, and the second valve v2 is energized to release it. By closing, air from the compressed air source 11 is directly introduced into the vapor conduit 12 to scavenge the residual vapor in the exhaust pipe 12.

Reference numeral 15 denotes a branch pipe that branches off at the base end side of the air conduit 10, and an air nozzle 16 is provided at the tip of this branch pipe 15 via a normally closed third solenoid valve v3. As shown, the air nozzle 16 is exposed in the groove insertion recess 9 airtightly provided in the nozzle hook 8, and the outer circumferential surface of the tip of the cylinder tip 21 of the refueling nozzle 20 hung on the nozzle hook 8 is exposed. , and is configured to be dried and cleaned using air from an air nozzle 16.

Incidentally, in the figure, reference numeral 7 is an alarm that is activated by a signal from the control device 5, M is a pump motor that drives the fuel pump 1,
SW indicates a nozzle switch installed on the nozzle hook 8, and GS indicates a gas sensor provided inside the gas sensor chamber 13.

Next, the operation of the apparatus configured as described above will be explained based on the flowchart shown in FIG.

When the refueling nozzle 20 is removed from the nozzle hook 8, the nozzle switch SW turns ON (step I), and the control bag M5
returns the display 6 to zero, and energizes the first valve V to open it (step port). As a result, the air from the compressed air supply source 11 blows through the air conduit 10, and the first valve V is energized and opened. Accordingly, the inside of the hepar conduit 12 connected to the jet portion 10J of the air conduit 10 becomes negative pressure.

Then, insert the refueling nozzle 20 into the vehicle's refueling port and pull the lever 22 to start refueling. However, the gun 1 is attached to the tip of the cylinder tip 21, and the inside of the vapor conduit 12 is sufficiently scavenged. In such a case, the gas sensor GS installed in the main body of the refueling device does not detect vapor from the gas sucked from the tip of the cylinder tip 21 (Step C).
. The state in which vapor is not detected is defined as the time it takes for the air sucked before the refueling nozzle 20 is inserted into the fuel filler port of the automobile to reach the gas sensor chamber 13, that is, at least for a certain period of time until the air reaches the gas sensor chamber 13 immediately after the start of suction. Since it has to continue until the time Tl, for example 3 seconds, has elapsed, it is assumed that there is no scavenging failure after that time (Step E), and the pump motor MVON is turned on (Step E).

If gasoline vapor is detected after that (go to step), the first valve Vl is demagnetized and closed to stop the vapor suction (step).

Detection of gasoline vapor in step (to) continues until refueling is started and a signal of, for example, 5 pulses is output from the flow rate pulse transmitter 4 (step).
.

Next, when the refueling amount reaches the specified amount or the fuel tank is full and the refueling nozzle 20 is applied to the nozzle hook 8 again, the nozzle switch SW is turned OFF (step H), and the control is accordingly performed. When the pump motor M is turned off, the device 5 energizes the first valve v1 to open it, and energizes the second valve v2 to close it (step N). This results in
A large amount of air from the compressed air supply source 11 flows into the vapor conduit 12 from the air conduit 10 and discharges the eight bars remaining in the gas sensor chamber 13 and the vapor conduit 12 from the open end on the side of the cylinder tip 21. Valve v3 is energized to open it, and air is blown from the air nozzle 16 provided in the cylinder tip insertion recess 9 of the oil supply device main body to the outer circumferential surface of the cylinder tip 2 of the oil supply nozzle 2o to remove any particles that have adhered to this part. Force the gasoline to dry and wipe it away. and a certain time T2, for example 5
After a few seconds have elapsed, the first valve V+,
Close the third valve v3 and open the second valve 2 at the same time (
Step E) Enter standby for next refueling.

On the other hand, in step (c), if the gas sensor GS detects that gasoline is hot, that is, if the gasoline adhering to the tip 21 of the refueling nozzle 20 is not sufficiently wiped off due to filling up the tank immediately, or if the gas is continuously If the inside of the vapor conduit 12 is not sufficiently scavenged due to manual refueling, the control device 5 activates the alarm 7 to alert the operator, and closes the first valve vI. Cut off the vapor suction (step
w).

Due to this abnormality, the operator or the refueling nozzle
When hooked to the nozzle hook 8, the nozzle switch SW turns OFF.
(step force), the control device 5 stops the operation of the alarm 7 (step yo), and the first valve v
The vapor conduit 12 is opened by opening the second valve V2 and closing the second valve V2.
The air nozzle 16 is made to face the groove insertion recess 9 by opening the third valve V3 while flowing air inside to scavenge the inside.
The cylinder tip portion 21 is cleaned with air (Step N). After a certain period of time T2 has elapsed, the first valve V1 is closed, the second valve v2 is opened, and the third valve v3 is closed (step 1), returning to the standby state.

On the other hand, if vapor is not detected before a certain amount of fuel is supplied in step (ri), the control device 5
The pump motor M is immediately turned off (step 1), the alarm 7 is activated to prompt the operator to confirm the oil type, and the first valve V is closed to cut off vapor suction (step 1). As a result, when the operator hooks the refueling nozzle 20 to the nozzle hook 8, the nozzle switch SW turns OFF (step force), and the control device 5
1]! Stop (step yo), and then step (
nu) to (sa) are executed and return to the standby state again.

In addition, when there is a car waiting for refueling and continuous refueling is performed, if the refueling nozzle 20 is removed from the nozzle hook 8 before the fixed time T2 has elapsed in step (R), the nozzle switch SW becomes ○N. (Step So). In this case, the control table N5 immediately closes the first valve v1 and opens the second well v2 to stop scavenging, and at the same time closes the third well v3 to drain air from the groove insertion recess 9. Cut off the discharge of water (Step 2). And from this state, display 61F! : Return to zero, open the first valve V to create a vapor suction state (step B), and execute the series of operations for the next refueling again.

(Effect) As stated above (according to the invention), if paper is detected within a certain period of time after the refueling nozzle is turned off, refueling is disabled, so the refueling nozzle is By detecting the amount of vapor remaining in the suction pipe that adheres to the outer circumferential surface of the tip, it is possible to prevent misidentification such as identifying fuel oil in the fuel tank as gasoline, which can be used continuously during busy periods. This prevents refueling errors that can easily occur during refueling, and also allows you to constantly check the cleaning of the tip of the refueling nozzle and the condition of the scavenging air in the conduit.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the configuration of a refueling snowmaking machine showing an embodiment of the present invention, Fig. 2 is a diagram showing the configuration of the pipes leading from the positive pressure and negative pressure generating means to the gas sensor chamber, and Fig. 3 is a diagram showing the tip of the refueling nozzle. FIG. 4 is a flowchart showing the operation of the device. 1...Refueling pump 4...Flow rate pulse transmitter 6...Display device 8...Nozzle hook 72...Vapor conduit 13...Gas sensor chamber 3...Refueling Hose 5...Control device 7...Alarm 1o...Air conduit 16...Air nozzle 20...Refueling nozzle v2...Valve SW of cup 2...Nozzle Switch...First valve...Third well GS...Gas sesisa

Claims (1)

[Claims] A conduit having a means for detecting fuel oil vapor and opening at the tip of the refueling nozzle; and a suction means for causing the conduit to suction the vapor in conjunction with the operation of removing the refueling nozzle from the nozzle hook. and means for disabling refueling based on a vapor detection signal from the detection means output within a certain period of time after the start of operation of the suction means.