JPH1024997A - Oil feeding nozzle provided with function for judging kind of oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure and to shorten the time for judging the kind of oil. SOLUTION: A vapor suction and vent hole 4 on a nozzle part, an air pump 16 communicating with the vapor suction and vent hole 4 on a pipe body part, a gas sensor 12 connected with the air pump 16, an air pump controlling means 19 for making the air pump 16 execute evacuating action, successively sucking action and furthermore evacuating action and a means 20 for judging kind of oil for judging existence of gasoline vapor by output of the gas sensor 12 during air sucking action, are provided. As sucking action is performed before an automotive fuel tank is inserted, in case of a gasoline car with high vapor concn., air contg. vapor with high concn. flows into the gas sensor 12 approximately at the same time as a nozzle is inserted to judge a gasoline car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply nozzle having a function of determining the type of fuel oil based on the concentration of vapor remaining in an automobile fuel tank.

[0002]

2. Description of the Related Art Light oil and gasoline are known as fuel oils for automobiles. If fuel oils of different oil types are erroneously supplied, engine problems will occur. For this reason, a fueling device is proposed in which the vapor of the vehicle fuel tank is suctioned from the cylinder tip of the fueling nozzle to the gas sensor chamber of the fueling device main body by a suction pump provided in the fueling device main body to determine the oil type of the vehicle fuel tank. Have been.

In the case where such a gas sensor is provided on the main body of the fueling device, in order to guide the vapor to the gas sensor, it is necessary to connect the nozzle to the main body of the weighing machine with a tube, and the vapor necessarily reaches the gas sensor. In addition to the problem that the time required to determine the oil type is long, the piping connecting the refueling nozzle and the refueling device body needs to be routed, resulting in a complicated pipe configuration. .

In order to solve such a problem, the applicant of the present invention communicates with an insertion detecting means for detecting insertion into an automobile fuel tank at a cylinder tip, and communicates with a cylinder body with a vapor suction / exhaust port of the cylinder tip. The present invention has proposed a refueling nozzle including an air pump, a gas sensor sucked and discharged by the air pump, and air pump control means for supplying air to the gas sensor by inhaling the air pump for a certain period of time based on a signal from the insertion detecting means.

[0005] According to this, a tube for feeding vapor from the refueling nozzle to the refueling device main body becomes unnecessary, and when the nozzle is inserted into the vehicle fuel tank, the oil type is automatically set without waiting for the operation of the refueling lever. Can be determined, the time required for oil type determination can be shortened, and the pipeline configuration can be simplified.

[0006]

However, the need for an insertion detecting means for detecting insertion into the vehicle fuel tank not only complicates the structure of the nozzle tube tip, but also causes the nozzle tube tip to be inserted into the vehicle fuel tank. Since the intake operation is started for the first time at the time when the oil type is determined, there is an inconvenience that some play time is generated until the oil type is determined, and it takes some time before the oil type is determined. The present invention has been made in view of such a problem, and there is no need for a means for detecting the insertion of a nozzle cylinder tip, thereby simplifying the structure and reducing the time required for oil type determination. To provide.

[0007]

According to the present invention, there is provided an air pump communicating with a vapor suction / exhaust port at a cylinder tip and communicating with a vapor intake / exhaust port at the cylinder tip with a cylinder body. A gas sensor connected to the air pump, and a signal generated due to the removal of the nozzle, air pump control for causing the air pump to perform a scavenging operation for a certain period of time, and then perform a suction operation, and further perform a scavenging operation. Means and oil type determining means for determining the presence or absence of gasoline vapor based on the output of the gas sensor during the intake operation.

[0008]

Since the intake operation has been performed before the insertion of the fuel tank for an automobile, especially in a gasoline vehicle having a high concentration of vapor, air containing a high concentration of vapor flows into the gas sensor almost simultaneously with the insertion of the nozzle. Is determined to be a gasoline-powered vehicle.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 shows an embodiment of an oil supply device provided with an oil type discriminating function using an oil supply nozzle of the present invention, and FIG. 2 shows an embodiment of an oil supply nozzle of the present invention. 1 is a nozzle cylinder tip 2
And a body 3, and the cylinder tip 2 is provided with a vapor intake / exhaust port 4 for sucking vapor from a fuel tank of an automobile.

On the other hand, the body 3 is provided with a main valve 8 which is connected to a refueling pump 6 via a refueling hose 5 and is opened and closed by a refueling lever 7, and a lever pull-down detecting means 9 for detecting pulling-up of the refueling lever 7. In addition, it is configured to house a sensor unit 10 described later.

The sensor unit 10 includes a gas sensor 12 connected to the vapor intake / exhaust port 4 by a tube 11,
An air flow meter 13 connected to the sensor 12, and an air filter 1 connected to the air flow meter 13,
A control device on the side of the fueling device main body by a cable 26 via connectors C1 and C2, comprising an air pump 16 for intake and exhaust connected via the air pump 5, a motor 17 for driving the air pump 16, and a fueling nozzle control device 18. 30.

The refueling nozzle control device 18 comprises an air pump control means 19 and an oil type judging means 20.
The air pump control means 19 receives the oil type determination start signal from the control device 30 on the fueling device main body side, rotates the air pump 16 forward for a predetermined time T1, for example, for 1 second, scavenges the gas sensor 12, and then turns the air pump 16 on. The gas sensor 12 is turned over and the atmosphere is released from the vapor suction / exhaust port 4 for a predetermined time T.
The suction is performed for 2, for example, 3 seconds, and after the oil type is determined, and when the refueling end signal is received from the control device 30 on the main body side, the air pump 16 is rotated forward for a predetermined period of time T3, T4, for example, 3 seconds to scavenge the gas sensor 12. Things.

The oil type judging means 20 detects a change in the level of the signal from the gas sensor 12 when the air pump 16 starts the suction operation, and detects a change in the level equivalent to the case where gasoline vapor is present. Then, an oil type signal indicating that the gasoline is output is output to stop the judging operation. When the signal from the lever pulling detecting means 9 is input, the signal level based on the gasoline vapor for a predetermined time T5, for example, one second, is outputted. It detects whether or not there is a change, and outputs a signal indicating that it is gasoline when it can be determined that gasoline is used.

If the gas cannot be determined to be gasoline, the amount of air flowing into the gas sensor 12 is measured by the air flow meter 1.
After checking by step 3, if the air amount is normal and the level of the signal from the gas sensor 12 is lower than the gasoline vapor, lower than the undefined region level, and higher than the light oil vapor minimum level, the light oil Is output. If no oil type can be determined, an indeterminate signal indicating that the oil type cannot be specified is output, and a lever pull signal is detected within a predetermined time T6, for example, 30 seconds. The configuration is such that the determination operation is terminated when it cannot be performed. In addition, the code | symbol C3 and C4 in a figure show the coupler which connects the hose 5. FIG.

Next, the configuration of the fueling device main body will be described. Reference numeral 6 in the drawing denotes an oil supply pump that feeds the fuel oil in the oil storage tank to the oil supply nozzle 1 described above. The oil supply pump is driven by a pump motor 21 and includes a flow meter 23 having a flow rate pulse transmitter 22.
The fuel oil is sent to the oil supply nozzle 1 through the pipe line 24 through the pipe.

Numeral 25 denotes oil type coincidence judging means.
The oil type determination signal transmitted from the oil type determination means 20 via the cable 26 and the oil type registered in the oil type registration storage means 27 are compared to determine the difference between the oil types.

Reference numeral 30 denotes a control device on the side of the above-described refueling device.
The on / off signal of the nozzle switch 31 due to the disengagement of the refueling nozzle 1 is output to the control device 18 on the nozzle side as an oil type determination start signal and a refueling end signal, respectively.
When the oil type determination signal from the oil type 8 matches the registered oil type, the pump motor 21 is operated, and the oil supply amount calculated based on the flow rate pulse from the flow rate pulse transmitter 22 is displayed on the display 32. When the oil types do not match, the alarm is issued from the alarm 33 without operating the pump motor 21.

Reference numeral 34 denotes a power supply circuit for supplying drive power to the sensor unit 10 of the refueling nozzle 1 via the cable 26 via an intrinsically safe circuit 35 such as a barrier. Reference numeral 36 in the drawing denotes a cancel switch for stopping the oil type determination operation and enabling manual refueling.

The operation of the nozzle having the above-described structure will be described with reference to the flow charts of FIGS. 3 and 4 and the timing chart of FIG. Will be described. When the nozzle 1 is removed from the nozzle hook and the nozzle switch 31 is turned on (FIG. 6 (a)) and the nozzle-off signal is input to the controller 30 on the main body side (step A in FIG. 3), the controller 30 displays the display 32. And outputs an oil type determination start signal (FIG. 6 (b)) to the control device 18 on the side of the refueling nozzle 1 via the cable 26 (step b in FIG. 3).

Air pump control means 19 for refueling nozzle 1
When the oil type determination start signal is input (step (a) in FIG. 4), the air pump motor 17 is driven to rotate the air pump 16 forward for a time T1 to supply clean air to the gas sensor 12, and the pipeline and the The vapor remaining in the gas sensor 12 is discharged (step b in FIG. 4) (FIG. 6).
(E)). After evacuating for the time T1, the air pump 16
Is reversed to start the intake from the vapor intake / exhaust port 4 of the nozzle cylinder tip 2 (step c in FIG. 4).

As described above, during the period from when the nozzle 1 is removed from the nozzle hook to when the nozzle 1 is inserted into the vehicle fuel tank, the scavenging has been completed and the intake has already been performed. , The vapor around the filler port of the vehicle fuel tank flows into the gas sensor 12.

As a result, when gasoline is stored in the vehicle fuel tank and the vapor concentration is high, the level of the signal of the gas sensor 12 rapidly increases (FIG. 6).
(F)). As a result, almost simultaneously with the insertion of the nozzle 1 into the vehicle fuel tank, it is determined that the oil type of the vehicle fuel tank is gasoline, and the determination operation is terminated (step in FIG. 4).
D).

When the judging operation is completed, the air pump control means 19 rotates the air pump 16 forward for a time T3 (Step E in FIG. 4) to scavenge the gas sensor 12 with clean air and terminate the operation from the fueling device main body. Wait for signal input (figure 4 step).

On the other hand, when the oil type judgment signal is input from the oil supply nozzle 1 (step c in FIG. 3), the oil type coincidence judging means 25 sets the registered oil type storing means 27 in the oiling apparatus main body.
Is compared with the data indicating the oil type registered in this case, in this case gasoline (Fig. 3, step d).

As a result of the comparison, if it is confirmed that the oil types match, the control device 30 turns on the pump motor 21 (step E in FIG. 3) and starts refueling.

After the predetermined amount of refueling has been completed,
When the refueling nozzle 1 is pulled out of the vehicle fuel tank, the nozzle 1 is returned to the nozzle hook, and the nozzle switch 31 is turned off (step F in FIG. 3), the control device 30 turns off the pump motor 21 (step T in FIG. 3). ) An end signal (FIG. 6 (c)) is output to the control device 18 on the refueling nozzle side (FIG. 3 step), and the refueling operation is completed.

On the refueling nozzle 1 side, when the end signal is input, the air pump control means 19
Is rotated forward for a predetermined time T4 (FIG. 4 step
G) Perform scavenging.

On the other hand, if the oil type does not match (step d in FIG. 3) as a result of the operation of determining the oil type by taking the vapor into the gas sensor 12, the oil type of the vehicle fuel tank is changed to another oil type. In this embodiment, after it is confirmed that the oil is light oil (step 3 in FIG. 3), the alarm 33 is activated (step n in FIG. 3).

When the vehicle fuel tank is confirmed by the notification, and when it is confirmed that the fuel in the vehicle fuel tank is gasoline due to an erroneous determination of the device, the cancel switch 36 is depressed (step 3 in FIG. 3). The apparatus 30 stops the notification (step e in FIG. 3) and executes refueling through the steps (e) to (h) in FIG. 3 in the same manner as in the case where the oil types match.

Also, as a result of the above confirmation, if the oil is still light oil, the nozzle 1 is returned to the nozzle hook and the refueling operation is completed. As a result, the nozzle switch 31 is turned off (Step F in FIG. 3), the control device 30 stops the notification (Step Y in FIG. 3), and outputs an end signal to the control device 18 on the refueling nozzle side (Step H in FIG. 3). ).

If it is not possible to determine whether the oil type matches or does not match any of the states, the annunciator 31 notifies that the oil type cannot be determined (step w in FIG. 3). If the fuel in the vehicle fuel tank is checked based on the notification and the fuel is confirmed to be gasoline, the cancel switch 36 is operated in the same manner as described above to operate the steps (e) to (h) in FIG. Makes it possible to refuel.

When it is confirmed that the fuel in the vehicle fuel tank is light oil, the nozzle 1 is returned to the nozzle hook and the refueling operation is stopped, so that the nozzle switch 31 is turned off (FIG. 3, step F). Stops (Fig. 3
Step yo).

Next, the operation of determining the oil type will be described in detail with reference to the flowchart of FIG. When the oil type determination start signal is input (step A), the signal Gx from the gas sensor 12 is compared with a preset gasoline vehicle vapor concentration reference g1, and the gas sensor 1
If the signal Dx from the control unit 2 exceeds the reference value g1 (step b), a signal indicating that the fuel is gasoline is output when the refueling lever 7 is pulled without executing the subsequent determination operation (step c). I do.

On the other hand, when the signal from the gas sensor 12 is lower than the reference value g1 (step b), a refueling lever pulling signal is input (step f), and the predetermined time T
5. If, for example, the signal Gx from the gas sensor 12 exceeds the reference level g1 for determining gasoline before one second elapses (step t) (step t), a signal indicating gasoline is output (step t). Step e).

Even if the time T5 has elapsed (step stitch), the signal Gx from the sensor 12 remains at the gasoline determination reference value g1.
If it does not exceed, the oil type determination operation is stopped (Steply), the air flow rate of the air pump 16 is checked based on the signal from the air flow meter 13, and the vapor is normally sent to the gas sensor 12. Check if it is (step nu).

When the air pump 16 is operating normally and the sampling flow rate is secured, the reference value g2 for determining the signal Gx from the gas sensor 12 as light oil is used.
If it is less than or equal to the reference value g2 for determining light oil (step S1), it is determined that the oil is light oil and the result of the determination is output to the control means 30 of the refueling device (step e).

If the lever pull signal is not input even after the time T4 has elapsed (step w), the sampling air amount is abnormal (step n), the gas sensor 1
If the signal Gx from Step 2 is equal to or greater than the reference value g2 for determining light oil (Step 1), the determination operation is terminated, and a determination disable signal is output (Step 4).

[0038]

As described above, in the present invention,
An air pump communicating with the vapor suction / exhaust port of the cylinder tip and the vapor suction / exhaust port of the cylinder tip with the cylinder body, a gas sensor connected to the air pump, and a signal generated due to the removal of the nozzle. Air pump control means for causing the air pump to perform a scavenging operation for a certain period of time, then performing an intake operation, and further performing a scavenging operation, and oil type determining means for determining the presence or absence of gasoline vapor based on the output of a gas sensor during the intake operation. Therefore, in the case of a gasoline-powered car with a high vapor concentration, since the intake operation has been performed before the automobile fuel tank was inserted, it is possible to determine that the gasoline-powered car is almost at the same time as the insertion of the nozzle, as well as the fuel tank of the nozzle. This eliminates the need for a means for detecting insertion into the device, thereby simplifying the structure.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a refueling nozzle of the present invention.

FIG. 2 is a configuration diagram showing one embodiment of a refueling device using the refueling nozzle.

FIG. 3 is a flowchart showing an operation of the weighing machine using the nozzle.

FIG. 4 is a flowchart showing an operation of the nozzle.

FIG. 5 is a flowchart illustrating details of an oil type determination operation.

FIGS. 6A to 6G are timing charts showing the operation of the above device. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refueling nozzle 4 Vapor suction / exhaust port 5 Refueling hose 7 Refueling lever 8 Main valve 9 Lever pulling detection means 10 Sensor unit 12 Gas sensor 13 Air flow meter 16 Air pump 17 Air pump motor 18 Control device on nozzle side

Claims (5)

[Claims] 1. An air pump communicating with a vapor intake / exhaust port in a cylinder tip, an air pump communicating with a vapor intake / exhaust port in the cylinder tip in a cylinder body, a gas sensor connected to the air pump, and the nozzle being removed. Air pump control means for causing the air pump to perform a scavenging operation for a certain period of time by a signal generated due to the air pump, then performing an air suction operation, and further performing a scavenging operation, and controlling the gasoline vapor by the output of the gas sensor during the suction operation. An oil supply nozzle including oil type determination means for determining the presence / absence. 2. A gas sensor according to claim 1, further comprising a lever pull detecting means for detecting pulling of a refueling lever, wherein when gasoline vapor cannot be detected during said intake operation, said gas sensor is detected when a signal from said lever pull detecting means is inputted. The fuel supply nozzle according to claim 1, wherein the presence or absence of gasoline vapor or light oil vapor is determined based on a signal from the fuel supply nozzle. 3. A gasoline vapor detection operation based on a signal from the lever pull detection means also provides gasoline,
The refueling nozzle according to claim 2, wherein when the gas oil vapor cannot be detected, the notification that the gas oil vapor cannot be detected is performed. 4. An air flow rate measuring means connected to the air pump, wherein when gasoline vapor cannot be detected, the air flow rate is inspected by the air flow rate measuring means to determine the presence or absence of gas oil vapor. Item 4. A refueling nozzle according to item 3. 5. When a signal is not output within a predetermined time from the flavor pulling detection means, the determination operation is stopped,
The refueling nozzle according to claim 3, which outputs a signal indicating that determination is impossible.