JPH0476879B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a refueling device of a type that is placed on the loading platform of a vehicle and moves and delivers kerosene, etc. The present invention particularly relates to a refueling device that is placed on the loading platform of an automobile and transports kerosene, etc. Regarding devices that can.

[Prior Art] Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No.
As described in Publication No. 55897, if there is an operation to close the nozzle valve during refueling at the desired refueling amount or slightly before the tank is full, the nozzle valve will be restarted when an integer value close to the refueling amount has been reached. A device is known that is configured to automatically stop refueling by closing a solenoid valve. Further, in this device, if the refueling is stopped when the integer value is reached, overfilling will occur due to a delay in response, so the system is configured to stop the refueling before the predetermined amount in anticipation of this delay in response.

[Problems to be Solved by the Invention] In these conventional devices, refueling is stopped by setting the amount of response delay in advance, but in a mobile delivery device as shown in Fig. 1, the amount of response delay is set in advance. It was difficult to specify in advance, and it was not possible to accurately stop refueling using an integer value.

In other words, the amount of response delay is the sum of the amount that flows out from when the valve is driven until it closes, and the amount that flows out due to inertia from the pipeline downstream of the valve after the valve closes. It is difficult to predict the amount of outflow due to the latter inertia using conventional equipment. For example, in this type of equipment, it is common practice to refuel by extending the hose in increments of 5 m or 10 m depending on the delivery destination; if the hose is long, the response delay increases, and if the hose is short, it decreases. As mentioned above, the amount of response delay due to inertia changes depending on the length of the hose. In addition, since refueling is performed in containers with different installation conditions depending on the delivery destination, the height of the container location and the method of arranging the hose (in other words, in some cases the hose can be placed directly, in other cases it can be placed over a wall in a heap) In some cases, the amount of response delay due to inertia will change depending on the location (in some cases), etc.

[Means for Solving the Problems] The present invention has been made in response to the above problems, and is provided in a refueling device of a type that is placed on the loading platform of an automobile and transports kerosene, etc.; an oil supply path equipped with a pressure-responsive valve that closes when the oil supply flow rate is below; a measuring means for measuring the flow rate in the oil supply path and outputting a flow rate signal for each unit flow rate; and detecting the amount of oil supply by integrating the flow rate signals. means for detecting the refueling flow rate based on the flow rate signal; a control valve for adjusting the flow rate and stopping the refueling by throttling the oil supply path; and controlling the control valve from the normal refueling state to perform refueling. means for storing a first required stop amount set based on the amount expected to be discharged during the stop; a second required amount that is expected to flow out during the closing operation from the predetermined low-speed lubrication with the control valve throttled; means for storing a required stop amount; means for storing a lower limit flow rate for keeping the pressure-responsive valve open; and a means for storing a stop request operation such as temporarily closing the nozzle valve during refueling. means for detecting; upon receiving a detection signal from the detection means, adding the required amount of refueling stop given by the storage means to the amount of refueling at that time, finding the nearest integer value greater than or equal to this added value, and determining when to stop refueling; means for setting the target value; upon detecting that the oil supply amount has reached the target value before the first required stop amount, the control valve is throttled until the flow rate is close to the lower limit flow velocity, and after this, the oil supply amount is set to the target value; It is an object of the present invention to provide an apparatus capable of performing accurate integer value lubrication.

[Example] Specific examples thereof will be explained below based on the drawings.

FIG. 1 is an external view showing an embodiment of the present invention in use, showing a mobile refueling device placed on the loading platform of an automobile, and FIG. 2 is an explanatory diagram showing the configuration of this embodiment.

1 is a car, 2 is an oil tank placed on the loading platform 3 of the car 1, and 4 is a fuel supply device body installed in parallel with the oil tank. Then, the metered amount of oil is supplied to the container 7 to be supplied with oil at the supply nozzle 6.

The oil supply device main body 4 includes a pump 8 that pumps oil from the tank 2, a drive circuit 10 for the pump 8, a meter 11 facing the oil supply path, and a flow rate unit that outputs a flow rate signal every fixed flow rate based on the amount measured by the meter 11. a metering means 13 consisting of a transmitter 12, and a control valve 1 facing the oil supply path and adjusting its opening degree to adjust the oil supply flow rate.
4. Valve driving means 15, which includes a motor and the like, opens and closes the control valve 14, and a control section 16, which is connected to each of the above sections and manages and controls the refueling operation according to a program, is provided. This control unit 16 includes an operation board 17 equipped with various necessary operation switches including a power switch, a display board 18 that displays refueling amount, stoppage target amount, amount, etc., and a CPU.
It consists of a microcomputer having ROM, RAM, etc., and a control board 19 that centrally controls each part according to a program registered in the ROM.

In addition to a nozzle valve 21 that is opened and closed by a lever 20, the refueling nozzle 6 is equipped with a pressure-responsive valve 22 that is always energized in the closing direction and opens when the oil supply oil pressure exceeds a certain level. The valve is opened by the supply oil pressure, the flow path is throttled by the control valve 14, and the valve is closed when the supply oil pressure falls below a predetermined pressure, preventing the oil in the hose 5 from flowing out from the nozzle 6 due to head or inertial flow when refueling is stopped. are doing.

FIG. 3 is a block diagram mainly showing the functional operation of the control board 17, and the operation of the embodiment will be explained below based on this diagram. 30 is a refueling amount detection means;
The flow rate signal from the measuring means 13 is integrated to give the amount of oil supplied. 31 is a detection means for a stop request operation given by once closing the nozzle valve 21, which detects the flow rate signal from the metering means 13, and if no flow rate signal is input for a certain period of time or more, the nozzle valve 21
It determines that the door is closed and outputs a detection signal.
32 is the first required stop amount Vr that is set based on the amount discharged while stopping the oil supply by throttling the control valve 14, and the lower limit flow rate νmin required to keep the pressure-responsive valve 22 open. storage means for storing etc.,
Reference numeral 33 denotes target amount setting means for setting a target amount for stopping refueling based on the required stop amount given by the storage means 32 and the refueling amount given by the refueling amount detection means 30.
Reference numeral 34 denotes a valve control means that opens and closes the control valve 14 based on the amount of oil supplied by the amount detection means 30 and the target amount given by the target amount setting means 33. 35 is ROM
It holds a program for controlling and operating the valve control means 34 in a predetermined sequence. 36
37 is a first display means for displaying the amount of oil supplied by the oil amount detection means 30, and a second display means 37 is for displaying the target amount given by the target amount setting means 33. 3
Reference numeral 8 denotes a flow rate detection means, which measures the interval of flow rate signals sent from the measuring means 13 and calculates the flow rate during that time.

Therefore, first, when a refueling start operation is performed on the operation board 17, the pump 8 is driven via the pump drive circuit 10, and the control valve 14 is opened via the valve control means 34 and the valve drive means 15. ,
A standby state is established in which refueling can be started by opening the nozzle valve 21. In this state, the nozzle valve 21
When the valve is opened, the metering means 13 measures the flow rate in the oil supply passage and issues a flow signal, and the oil supply amount detection means 3
At 0, this is counted to determine the amount of oil supplied, and this amount of oil supplied is displayed on the first display means 36. When the nozzle valve 21 is closed either automatically when the refueling container 7 is almost full or manually closed by the user when the refueling amount is close to the desired amount, the stop request detection means 31 detects this and sends a signal. Output. Upon receiving this detection signal, the target amount detection means 33 reads the current oil supply amount from the oil supply amount detection means 30 and the required stopping amount from the storage means 32, and calculates this value based on the sum of these. The closest integer value above is set as the target amount. Furthermore, the valve control means 3
4, upon receiving the detection signal, the target amount setting means 3
The target amount set in step 3 is read, and the control valve 14 is closed so as to stop the refueling exactly at the target amount compared to the refueling amount provided by the refueling amount detection means 30.

The detection method of the stop request operation detection means 31 is not limited to the above example. For example, the operation board 17 or the refueling nozzle 6 may be provided with a switch means, and the detection method may be directly detected by an electric signal or the like accompanying the switch operation. It may be configured.

FIG. 4 is a flowchart showing the main part of the program registered in the ROM 35. Based on this diagram, the operation mainly related to stopping the fuel supply will be explained in more detail.

When there is a refueling start operation on the operation board 17, the pump 8 is driven and the control valve 14 is opened, and the first display means 36 displays the refueling amount V given by the refueling amount detecting means 30 at any time. The system enters a refueling standby state (1) in which the nozzle valve 21 waits for opening operation, and in this state, the nozzle valve 21 is opened and refueling is started. During refueling, nozzle valve 21
Once closed, it is detected by the stop request operation detection means 31 (2), and the required stop amount Vr registered therein is read from the storage means 32 (3), and based on the oil supply amount V at that time. Find V+Vr and calculate this V+
The closest integer value I that is greater than or equal to Vr is set as the target value, and this target value I is displayed on the second display means 37 (4). Here, when the nozzle valve 21 is opened and refueling is resumed, when it is detected that the difference IV between the target value I and the refueling amount V has reached the required stop amount Vr (5), the difference at that time is detected. ROM35 with IV as a parameter
Read the standard flow velocity νn (6) and detect the flow velocity detection means 3.
The control valve 14 is compared with the flow velocity ν given in step 8 (7), and if ν is greater than or equal to νn, the control valve 14 is throttled in the closing direction for a certain period of time so that it becomes less than or equal to νn (8).

Next, the flow velocity ν is compared with the lower limit flow velocity νmin necessary to keep the pressure-responsive valve 22 open (9), and νmin
If it is less than that, the control valve 14 is operated in the opening direction for a certain period of time in order to continue refueling (10). Next, it is determined whether the refueling amount V is within the second required stop amount R (the remaining amount preset based on the expected outflow amount while closing the control valve 14 from near the lower limit flow velocity νmin) to the target value I. If it is within R, the control valve 14 is closed, and if it is not within R, the process is repeated from step (6).

FIG. 5 shows an example of the oil supply operation controlled in the above manner using a flow rate-flow velocity curve. As shown in the diagram, the remaining amount Rn until the refueling reaches the target value I
If the remaining amount is R ₀ to R ₁ , the flow velocity is set to ν ₀ to _{ν 1.}
The control valve 14 is closed when the oil supply amount reaches the second required stop amount R of the target value I. .

[Effects of the Invention] The present invention is configured as described above, and when the amount of refueling reaches the first required stop amount of the target integer value, the flow path is throttled by the control valve to reduce the flow speed to near the lower limit flow speed. Even if the control valve is later closed, even if there is only a slight outflow, the pressure-responsive valve will shut off the outflow.
Outflow due to inertia from the conduit downstream of the control valve is reduced, and even if the length of the hose or the installation conditions of the refueling container are different, the resulting error is extremely small and refueling can be stopped accurately with an integer value. In addition, since oil supply is stopped near the lower limit flow velocity, the pressure-responsive valve blocks the outflow with the slightest closing action of the control valve, and even if there is variation in the closing performance of the control valve, the response delay error associated with this is extremely minimized. This enables accurate integer value lubrication at all times.

[Brief explanation of the drawing]

FIG. 1 is an external view of one embodiment of the present invention. FIG. 2 is an explanatory diagram showing the configuration of the embodiment. FIG. 3 is a block diagram showing the functional operation of the control section of the embodiment. FIG. 4 is a flowchart showing the main part of the program of the embodiment. Fifth
The figure is a flow rate-flow velocity characteristic diagram of the example. Reference numeral 4 refers to the main body of the refueling device, 6 refers to the refueling nozzle, 13 refers to the metering means, 14 refers to the control valve, 21 refers to the nozzle valve, 22 refers to the pressure-responsive valve, 30 refers to the refueling detection means, 31 refers to the stop request operation detection means, and 32 refers to the storage means. , 33 is target amount setting means, 34 is valve control means, 36 is oil supply amount display means, 37 is target amount display means, and 38 is flow rate detection means.

Claims (1)

[Scope of Claims] 1. In a refueling device of the type that is placed on the loading platform of an automobile and transports kerosene, etc.; a refueling path equipped with a nozzle valve at the tip and a pressure-responsive valve that closes at a predetermined refueling flow rate or less. and; a measuring means for measuring the flow rate in the oil supply path and outputting a flow rate signal for each unit flow rate;
means for detecting the amount of refueling by integrating the flow rate signal; means for detecting the refueling flow rate based on the flow rate signal; a control valve for controlling the flow rate and stopping the refueling by throttling the oil supply path; a normal refueling state. means for storing a first required stop amount set based on the amount expected to be discharged while the control valve is throttled to stop the oil supply; means for storing a second stop required amount that is expected to flow out during operation; means for storing a lower limit flow rate for keeping the pressure-responsive valve open; and temporarily closing the nozzle valve during refueling. means for detecting a stop request operation performed by a method such as; upon receiving a detection signal from the detection means, adding the required amount of refueling stop given by the storage means to the amount of refueling at that time;
means for determining the nearest integer value greater than or equal to the added value and setting it as a target value for stopping the refueling; when it is detected that the refueling amount has reached the target value before the first required stop amount; A refueling device comprising: means for controlling the control valve so as to throttle the control valve, and then closing the control valve when the refueling amount reaches a second required stop amount of the target value. 2. The oil supply system according to claim 1, comprising means for displaying the amount of oil supplied by the oil amount detection means and means for displaying the target value set by the target value setting means.