JP2998780B2 - Refueling device with oil type discrimination function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply system 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 Diesel oil and gasoline are used as fuel oil for automobiles. Incorrect refueling of the oil type causes inconvenience to the engine. For this reason, there has been proposed a fueling device in which vapor is suctioned from a tip end of a fueling nozzle into a 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. However, in the case where such a gas sensor is provided on the side of the fueling device main body, the pipe line for drawing the vapor becomes long, so that it takes time for the vapor to reach the gas sensor, and it takes time to determine the oil type. In addition to the problem, there is a problem that a tube for connecting the suction and air supply means between the refueling nozzle and the main body is required, and the pipe configuration is complicated.

In order to solve such a problem, Japanese Patent Laid-Open Publication No. Hei.
As can be seen in Japanese Patent No. 279099, a gas sensor is provided at the tip of the refueling nozzle, and an insertion sensor that detects that the nozzle has been inserted into the vehicle fuel tank is provided, and after the nozzle is inserted into the vehicle fuel tank by the insertion sensor. There has been proposed an oil supply device having an oil type discriminating function configured to take in an output signal of a gas sensor at a stage after a predetermined time has elapsed and determine an oil type.

[0004] However, since the oil sensor is provided at the tip of the nozzle, the vapor remains adsorbed by the gas sensor after the oil type is determined. When the fuel oil rises to the tip of the nozzle, the oil sensor is immersed in the fuel oil, causing a problem that a failure or a detection error occurs.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and aims to shorten the time from the insertion of the nozzle to the determination of the oil type as much as possible, and to reduce the fuel in the vehicle fuel tank. An object of the present invention is to provide a refueling device capable of preventing a failure of a gas sensor due to oil or a detection error and determining an oil type with high reliability.

[0006]

In order to solve such a problem, according to the present invention, an insertion detecting means for detecting insertion into an automobile fuel tank is provided at a cylinder tip, and the cylinder tip is provided at a cylinder body. A gas sensor provided in the middle of a pipe connected to an air pump, and a gas sensor provided in the middle of a pipe connected to an air pump, and performing a suction operation of the air pump for a certain period of time by a signal from the insertion detection means to supply vapor to the gas sensor. An oil supply nozzle provided with an air pump control means for performing a scavenging operation for a fixed time after the oil type determination, a nozzle switch for detecting the removal of the nozzle and outputting a signal, and a pump for supplying fuel oil to the nozzle, A flow meter was provided.

[0007]

Since the operation for automatically judging the oil type is automatically started by a signal from the insertion sensor, the time until the oil type judgment is shortened, and after the oil type judgment, the vapor of the gas sensor is automatically scavenged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows an embodiment of an oil supply device having an oil type discriminating function of the present invention, and FIG. 2 shows an embodiment of an oil supply nozzle used in the oil supply device of the present invention. 1 is roughly divided into a nozzle cylinder tip 2 and a body 3. The cylinder tip 2 has a gas suction port 4 for sucking the vapor of the fuel tank of the automobile, and the fact that the fuel oil has risen to the nozzle cylinder tip 2. There is provided a liquid level sensor 5 for detecting, and an insertion sensor 6 constituted by a light detecting means for detecting that the nozzle tip 2 has been inserted into the vehicle fuel tank.

On the other hand, the body 3 is provided with a main valve 9 which is connected to a refueling pump via a refueling hose 7 and is opened and closed by a refueling lever 8, and has a sensor unit 10 on its upper surface. I have.

The sensor unit 10 includes a tube 1
A gas sensor 12 connected to the gas suction port 4 by 1;
An air pump 15 for air intake and exhaust connected to the sensor 12 and a rear exhaust port 13 through an air filter 14, an air motor 16 for driving the air pump 15, and a control device 17 on the refueling nozzle side.
It is connected to a control device 30 on the fueling device main body side by a cable 18 via C2.

In the control device 17, the air pump control means 17 A receives the nozzle removal signal from the control device 30 on the main body side described later, rotates the air pump 15 forward for a certain period of time to scavenge the gas sensor 12, Receiving the insertion signal, the air pump 15 is reversed for a certain period of time to cause the gas sensor 12 to suck the vapor, and after the oil type is determined and when the liquid level detection signal from the liquid level sensor 5 is input, the controller 30 on the main body side The air pump 15 is rotated forward for a certain period of time in response to the nozzle application signal from the controller to cause the gas sensor 12 to scavenge.

The oil type determining means 17B receives the signal from the gas sensor 12 after the input of the insertion signal from the insertion sensor 6 and determines the oil type. The oil type matching determining means 17C determines the oil type. The oil type of the means 17b is compared with the oil type registered in the oil type registration and storage means 17D to judge whether the oil type is different, and the result of the judgment is outputted to the control device 30 on the main body side. In addition, the code | symbol C3 and C4 in a figure show the coupler which connects the hose 7. FIG.

Next, the configuration of the fueling device main body will be described. Reference numeral 20 in the figure denotes a fuel pump for feeding the fuel oil in the oil storage tank to the above-described fuel nozzle 1, which is driven by a pump motor 21 and has a flow rate pulse transmitter 22.
The fuel oil is supplied to the oil supply nozzle 1 through the pipe line 24 via the pipe 3.

Reference numeral 30 denotes a control device on the main body side, which outputs a nozzle switch 34 for turning on and off the refueling nozzle 1 and an on / off signal to the control device 17 on the nozzle side, and a signal from the control device 17 is an oil type matching signal. , The pump motor 2
1 to output the amount of lubrication calculated based on the flow rate pulse from the flow rate pulse transmitter 22 to the display 36, and in the case of the oil type mismatch signal, from the alarm 35 without operating the pump motor 21. It is configured to issue an alarm.

Reference numeral 39 in the figure denotes a power supply circuit for supplying drive power to the sensor unit 10 of the refueling nozzle 1.
It is connected to the sensor unit 10 by a cable 18 via an intrinsically safe circuit 38 such as a barrier.

The operation of the apparatus constructed as described above will be described with reference to the flowcharts of FIGS. 3 and 4, and the timing chart of FIG. 5, taking an example of a gasoline refueling apparatus. When the nozzle 1 is removed from the nozzle hook and the control signal from the nozzle switch 34 is input to the control device 30 on the main body side (step A in FIG. 3), the control device 30
6 is returned to zero, and the ON signal of the nozzle switch is output to the control device 17 on the refueling nozzle 1 side via the cable 18 (step B in FIG. 3).

The air pump control means 17A of the control device 17
When the ON signal from the nozzle switch 34 is input to the control device 30 on the main body side (Step A in FIG. 4), the motor 16 is driven to rotate the air pump 15 forward for a predetermined time, for example, 1 second, and the gas sensor 12 is cleaned. Supply fresh air
The remaining vapor is discharged (FIG. 4, Step B). When the refueling nozzle 1 is inserted into the vehicle fuel tank after the exhaust, a signal is output from the insertion sensor 6 and the insertion of the nozzle 1 is detected (FIG. 4, step c).

When the nozzle 1 is inserted, the motor 16 is automatically driven in reverse by the pump motor control means 17A to suck the vapor from the vehicle fuel tank to the gas sensor 12 from the vapor suction port 4 (step d in FIG. 4). The refueling lever is pulled up after the insertion, but the detection signal input from the gas sensor 12 by the inflow of the vapor during the idle time from the nozzle insertion to the operation of the refueling lever 8, for example, about 0.5 seconds, is determined by the oil type. The determination result is determined by the determination unit 17B, and the determination result is compared with the data indicating the oil type registered in the registered oil type storage unit 17D by the oil type match determination unit 17C, in this case, gasoline (step in FIG. 4).
E).

As a result of the comparison, when it is confirmed that the oil types match (T1 in FIG. 5), an oil type match signal is output to the control device 30 on the main body side, and the air pump 15 is rotated forward for a certain period of time to obtain a gas sensor. Scavenge 12 (to step in FIG. 4). The control device 30 that has received the oil type coincidence signal (step 3 in FIG. 3)
C) Turn on the pump motor 21 (step d in FIG. 3) to start refueling.

When a flow pulse is input from the flow pulse transmitter 22 at the start of refueling (step e in FIG. 3), the control device 30 counts the flow pulse and displays it on the display 36 as a refueling amount (to step in FIG. 3). .

When the gasoline in the vehicle fuel tank rises to the filling port and the signal is output from the liquid level sensor 5 during refueling as in automatic full refueling (step 4 in FIG. 4).
(T2, T3 in FIG. 5), the air pump control means 17A rotates the air pump 15 forward for a predetermined time, for example, one second (step e in FIG. 4), discharges gasoline that has tried to enter the vapor suction port 4, and outputs the gas sensor 12A. To prevent immersion in gasoline.

After the predetermined amount of refueling has been completed,
When the refueling nozzle 1 is pulled out of the vehicle fuel tank,
Since the signal from the insertion sensor 6 disappears (step 4 in FIG. 4) (T4 in FIG. 5), the air pump control means 17A
Rotates the air pump 15 for a predetermined time, for example, one second (step stitch in FIG. 4) to scavenge the gas sensor 12.

When the nozzle 1 is returned to the nozzle hook and the nozzle switch 34 is turned off (step 3 in FIG. 3) (FIG. 5).
T5), the control device 30 turns off the pump motor 21 and outputs an off signal of the nozzle switch to the control device 17 on the refueling nozzle side (Stepch in FIG. 3) to stop the refueling operation.

The air pump control means 1 of the control device 17 on the refueling nozzle side to which the OFF signal of the nozzle switch 34 is inputted.
7A (step 4 in FIG. 4), the air pump 15 is normally rotated for a predetermined time, for example, 1 second (step nu in FIG. 4).
The gas sensor 12 is scavenged to prepare for the oil type determination at the time of the next refueling.

On the other hand, when the oil type does not match, that is, when the oil type in the automobile fuel tank is light oil as a result of the operation of determining the oil type by taking the vapor into the gas sensor 12 (step in FIG. 4). E) Output a signal indicating that the oil type does not match to the control device 30 on the main body side, and rotate the air pump 15 forward for a certain period of time to scavenge the gas sensor 12 (FIG. 4, step W). Upon receiving the oil type mismatch signal, the control device 30 on the main body side (step c in FIG. 4) activates the alarm 35 (step c in FIG. 3) to prompt confirmation of the oil type. As a result of checking the oil type, it was found that the oil type was different, and nozzle 1
Is returned to the nozzle hook and the nozzle switch 34 is turned off (FIG. 3, step n), the controller 30 stops the notification, and outputs a signal of the nozzle switch OFF to the controller 17 on the refueling nozzle side (FIG. 3). Stepsle).

When the nozzle 1 is pulled out of the vehicle fuel tank and the signal from the insertion sensor 6 is lost (step f in FIG. 4), the air pump 15 is again turned on for a predetermined time.
For example, the gas sensor 12 is rotated forward for 1 second (FIG. 4 step), and the gas sensor 12 is scavenged. Further, at the time point when the nozzle switch off signal is sent from the control device 30 on the main body side (step 4 in FIG. 4), the air pump 15 is further turned on for a predetermined time.
For example, the gas sensor 12 is rotated forward for 1 second (step n in FIG. 4) to further completely scavenge the gas sensor 12.

In the above description, the case where gasoline is supplied has been described. However, the present invention can be similarly applied to a case where the fueling device main unit supplies light oil.

[0028]

As described above, in the present invention,
A gas sensor provided in the middle of a pipe connected to an air pump, communicating with an insertion detecting means for detecting that the cylinder tip has been inserted into the vehicle fuel tank, and communicating with a vapor suction / exhaust port of the cylinder tip at the cylinder body. And a gas supply nozzle provided with air pump control means for inhaling the air pump for a certain period of time in response to a signal from the insertion detection means to supply gas to the gas sensor and for performing a scavenging operation for a certain period of time after determining the oil type. A nozzle switch that detects and outputs a signal, a pump that supplies fuel oil to the nozzle, and a flow meter are provided, so when the nozzle is inserted into the vehicle fuel tank, there is no need to wait for the operation of the refueling lever. Automatically performs oil type determination to reduce the time required for oil type determination.After oil type determination, the gas sensor vapor is automatically scavenged for the next oil type determination. Mistakes can be prevented that.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a fuel supply device of the present invention.

FIG. 2 is a view showing one embodiment of a refueling nozzle used in the same device.

FIG. 3 is a flowchart showing the operation of the weighing machine of the above device.

FIG. 4 is a flowchart showing an oil type determination operation in the same device.

FIG. 5 is a timing chart showing the operation of the above device.

[Explanation of symbols]

 Reference Signs List 1 refueling nozzle 4 vapor suction port 5 liquid level sensor 6 insertion sensor 7 refueling hose 8 refueling lever 9 main valve 10 sensor unit 12 gas sensor 15 air pump 16 motor 17 control device 30 control device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-51091 (JP, A) JP-A-3-700 (JP, A) JP-A-3-29798 (JP, A) JP-A-4-297 367496 (JP, A) JP-A-3-289495 (JP, A) JP-A-4-294795 (JP, A) JP-A-8-26400 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B67D 5/32

Claims (3)

(57) [Claims] 1. An insertion detecting means for detecting insertion into a fuel tank of an automobile at a cylinder tip, and communicating with a vapor suction / exhaust port of the cylinder tip at a cylinder body and in the middle of a pipe line connected to an air pump. A gas sensor provided, and air pump control means for performing a suction operation of the air pump for a predetermined time in accordance with a signal from the insertion detection means to supply vapor to the gas sensor, and for performing a scavenging operation for a predetermined time after determining the oil type. An oil type discriminating function comprising: a refueling nozzle, a nozzle switch for detecting a detachment of the nozzle, and outputting a signal, a pump for supplying fuel oil to the nozzle, and a refueling device main body including a flow meter. Refueling equipment equipped. 2. The oil supply device according to claim 1, wherein said air pump control means performs a scavenging operation of said air pump for a predetermined time in accordance with a nozzle disconnection signal from said nozzle switch and a nozzle engagement signal. 3. The oil type discriminating function according to claim 1, wherein a liquid level detecting means is provided at the cylinder tip, and the air pump control means causes the air pump to perform a scavenging operation for a predetermined time according to a liquid level detecting signal from the liquid level detecting means. Refueling device equipped with.