JPS6375808A - Feeding controller for fuel oil feeding vehicle - Google Patents

Abstract

PURPOSE:To safely, surely, and quickly feed an oil by detecting a flow rate and a pressure and controlling rotation of an engine in such direction that the deviation from a target value is reduced. CONSTITUTION:An oil feeding controller 17 of a fuel oil feeding vehicle consists of a pressure sensor 16, a flow rate detecting means 19, a flow rate control means 21, a pressure control means 27, a low selector 35, a driving operation means 36, etc., and a governor 18 which controls the number of rotation of an engine 8 is connected to the controller 17. Both control means 21 and 27 subject respective deviations to proportional integral and differential (PID) operation and send flow rate and pressure deviation signals that deviations are reduced. The low selector 35 controls rotation of the engine 8 by selected low level deviation signals. Thus, the flow rate and the pressure are always kept lower than preliminarily determined target values to safely, surely, and quickly feed an oil.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a refueling control device for a refueling vehicle, and more specifically, a refueling control device for a refueling vehicle that supplies aviation fuel to a landing aircraft at an airport. Must be related to.

``Prior Art'' When refueling aviation fuel, contract terms and conditions stipulate maximum allowable values for each of the flow rate of the fuel pumped through the refueling pipe and the pressure inside the refueling pipe in order to prevent damage to the aircraft piping. ing.

For this reason, in the refueling system for this type of fuel tanker, a flow meter and a pressure gauge are installed in the refueling pipe, and the operator constantly monitors the flow meter and pressure gauge to maintain the specified flow rate and pressure. The governor of the engine, which is the driving source for the pump, was manually operated to maintain the condition.

"Problems to be Solved by the Invention" By the way, the following problems have been pointed out in such conventional refueling control devices for refueling vehicles.

In other words, maintaining both the flow velocity and pressure below the maximum allowable value is an absolute requirement for the safety of refueling operations, but the flow rate per unit time should be increased on the premise that the flow velocity and pressure are within the maximum allowable ID. This is required from the economic point of view of refueling time.

However, the amount of refueling per unit time is determined by various factors such as the tank situation on the aircraft side, the fuel flow rate, and the pressure inside the refueling pipe. Among these, the flow rate and pressure in particular are constant and interrelated as refueling progresses. It fluctuates. Therefore, while maintaining the flow velocity manually at all times below the allowable value,
Moreover, there is a problem in that achieving quick refueling requires personal skill and is troublesome.

In the conventional example, the above-mentioned problems have been pointed out.

In view of the above-mentioned circumstances, the present invention has been made in order to solve the problems of the conventional example described above. To provide a refueling control device for a refueling vehicle that can safely, reliably, and quickly supply fuel to an aircraft while maintaining the flow velocity and pressure within a predetermined range without exceeding the specified range. With the goal.

"Means for Solving the Problems" The technical means of the present invention to achieve this objective are as follows.

This fuel tank is loaded with fuel into a tank using a pump powered by the engine. '31 is supplied to the aircraft via a refueling pipe, and its electric refueling control device is equipped with the following means.

First, the flow velocity detection means and the pressure detection means are respectively attached to the fuel supply pipe and electrically detect the flow velocity of the fuel being supplied and the pressure within the fuel supply pipe, respectively.

Next, the flow rate adjusting means compares the detected value of the flow rate detecting means with a preset target value of the flow rate and outputs a flow rate deviation signal.

Further, the pressure adjusting means compares the detected value detected by the pressure detecting means with a preset target value of pressure, and outputs a pressure deviation signal.

The selection means selects two of the flow velocity deviation signal and the pressure deviation signal.
A deviation signal having a lower level is alternatively selected by comparing the deviation signals.

The drive operating means controls the rotational speed of the engine to maintain target values of flow velocity and pressure based on the selection by the selection means.

"Function" Since the refueling control device for a refueling vehicle according to the present invention is comprised of such means, it functions as follows.

First, a refueling pipe is formed between the tank of the fuel truck and the fuel tank of the aircraft, target values of flow velocity and pressure are set, and the pump is driven by the engine. As a result, fuel 1 in the tank will be supplied to the pre-flight fuel tank via the fuel supply pipe.

Next, after refueling starts, the operation is as follows.

First, the flow velocity detection means detects the flow velocity, the flow velocity adjustment means compares the detected flow velocity value and the target value of the flow velocity, the pressure detection means detects the pressure inside the oil supply pipe, and the pressure regulation means compares the detected pressure value and the pressure. Compare with the target value.

Next, the flow velocity and pressure adjusting means proportionally → integral → differentiate the iB difference in flow velocity and the pressure deviation (hereinafter referred to as PID calculation), respectively, to reduce the flow velocity and pressure deviation, respectively. Sends a deviation signal.

Furthermore, the selection means compares the levels of these two flow rate and pressure deviation signals, selectively selects the deviation signal with a lower level, and outputs it to the drive operation means.

The drive operation means controls the rotation of the engine in a direction that reduces the flow velocity or pressure deviation based on the low-level deviation signal selected by the selection means.

In this manner, according to the present invention, both the intake flow and the pressure are always maintained without exceeding predetermined target values, and refueling can be performed safely, reliably, and quickly.

"Example" The present invention will be described in detail below based on the example shown in the drawings.

First, we will give an overview of the entire combustion engine.

FIG. 2 shows an example of a refueling system for a refueling vehicle according to the present invention, and FIG. 3 is a diagram showing the refueling state thereof.

In both figures, 1 is a refueling vehicle, and 1 is a refueling vehicle.
The aviation fuel loaded in tank 2 mounted on the chassis of
The fuel is supplied to a fuel tank (not shown) of the aircraft 4 from a fuel intake port 5 of the aircraft 4 via a refueling hose 3 . In this state, the refueling vehicle 1 supplies fuel to the aircraft 4.

Now, a fuel supply pipe 7 is connected to a bottom valve 6 provided at the bottom of a tank 2 mounted on the chassis of a fuel tank 1, and a pump 9 and a line strainer 10 are connected to each other, which are rotated by the engine 8.
is attached. Furthermore, the oil supply pipe 7 has a filter 11. Flow meter 13. A pressure gauge 14 is provided and connected to the oil supply hose 3. In this way, the fuel intake port 5 of the aircraft 4 and the bottom valve 6 of the refueling vehicle 1 are connected.
A pipe line is formed between the oil supply pipe 7 and the like.

Further, the flow meter 13 is attached with a flow rate sensor 15 forming a flow rate detection means to be described later, and the pressure gauge 14 is attached to a pressure sensor 16 as a pressure detection means to be described later. The detected amount is converted into an electric signal and inputted to the oil supply control device 17, and then the oil supply control device 1
A governor 18 for controlling the rotation speed of the engine 8 is connected to the engine 7.

The refueling vehicle 1 is configured as described above.

Next, the configuration of the refueling control device 17 of the fuel tank 1 will be explained.

FIG. 1 is a block diagram of a refueling control device for a refueling vehicle showing one embodiment of the present invention.

In the figure, the flow rate detection means 19 is attached to a flow meter 13 attached to the oil supply pipe 7, and includes a flow rate sensor 15 that emits a pulse signal corresponding to the flow rate, and a DA converter that converts the binary coded flow rate into a flow rate. It consists of 20. The flow rate sensor 15 employs, for example, a foot sensor transmitter that emits a pulse signal for each flow rate, and the pulse signal output of this transmitter corresponding to the flow rate is input to the DA converter 20 and converted into a flow velocity signal. Ru.

On the other hand, the pressure detection means is a pressure gauge 1 attached to the oil supply pipe 7.
4, and includes a pressure sensor 16, such as a pressure transmitter, which converts the pressure inside the oil supply pipe into an electrical signal.

Next, the flow rate adjusting means 21 is operated by a flow rate setting unit 22 which sets a target flow rate when the flow rate is below the maximum allowable value, and a flow rate detected by the flow rate detection unit 19 and the flow rate input by the flow rate setting unit 22. A comparator 23 that compares the target value with the target value, an input capacitor 24 (described later), and a central controller 25 (hereinafter V/
It consists of a CPU 25), a memory 33, and an output port 26.

The pressure adjusting means 27 also has a pressure setting section 28 that sets a target pressure when the pressure falls below the maximum allowable value, and a pressure setting section 28 that adjusts the pressure detected by the pressure sensor 16 and the pressure input from the pressure setting section 28. A comparator 29 for comparison and an input port 30 to be described later. It consists of a central control unit 31 (hereinafter referred to as P/CPU 31), a memory 3+, and an output port 32.

The input port 24.30 outputs the flow rate and pressure deviation output from the comparator 23.29 to V/CPU 25 and P/CP't.
Transmit the speed to J31 so that it can be calculated.

The V/CPU 25 and the P/CPU 31 perform PID calculations according to programs stored in memories 33 and 34 such as ROM, respectively, which instruct the calculation procedure of the ratio control amount by integral and differential operations, with a proportional operation as the main component. , the flow velocity and pressure deviation signals are respectively outputted in a comparable manner. These deviation signals are inputted to selection means, which will be described later, via output ports 26 and 32, respectively.

The selection means is, for example, a low selector 35, which selectively selects the lower level deviation signal from among the above-mentioned <PID calculated flow velocity and pressure width difference signal.

The drive operation means 36 includes an amplification section 37 that amplifies the low-level deviation signal selected by the low selector 35 and outputs a drive signal, and an opening/closing section 38 that opens and closes the governor 18 of the engine 8 in response to this drive signal. It consists of This opening/closing part 38 uses air as a driving source, for example, and an air proportional valve 39.
and a rotary actuator 40, the rotary actuator 40 is rotated by the air proportional valve 39 in accordance with the drive signal output from the amplifying section 37, thereby controlling the rotation of the engine via the governor 18 linked to the engine 8. Then, the rotation speed of the pump 9 is increased or decreased via the PTO device 43.

In addition, in this embodiment, the output of the flow rate sensor 15 is
It is also input to the frequency divider 41, and the frequency divider 41 outputs, for example, 1
The pulse is divided into 1 gallon and the counter 4
2 and the flow rate is integrated. This counter 42
has a presetting section (not shown) for refueling and a counting section (not shown) for calculating the remaining oil amount, and when a predetermined residual oil port is reached as a result of the above integration, the V/CPU 26 and P/ CPU32
Send out km7 easy signal.

In addition, in this example, the flow velocity and pressure were constantly monitored by disposing two CPUs and performing distributed processing, but it is also possible to monitor them in a time-sharing manner using one CPU. It is. Furthermore, in this embodiment, ratio control is used in order to easily and flexibly follow the complexly fluctuating refueling conditions, but it is of course also possible to use program control in which the control intervals during the entire refueling process are programmed in advance. be.

The above is the explanation of the configuration. Next, we will discuss the operation etc.

First, we will outline the overall operation.

When fuel 1 is supplied, a refueling hose 3 is connected to a fuel intake port 5 of an airplane 4, the flow rate and pressure are set, and a pump 9 is driven by an engine 8.

As a result, the fuel loaded in the tank 2 is transferred to the line strainer 10. Pump 9. Filter 11. Flow meter 13. The fuel is supplied to the fuel tank of the airplane 4 through the pressure gauge 14 and the like, and further through the refueling hose 3. The flow rate and pressure during refueling and the refueling flow are constantly monitored by the refueling control device 17, and are maintained at target values set within limits that do not exceed the maximum allowable value.

Next, fluctuations in flow velocity and pressure during refueling will be explained.

At the start of refueling, the piping load is small, so as the pressure from the pump 9 increases, the flow rate also increases accordingly.

However, as refueling progresses, the piping load gradually increases and fluctuates due to disturbances such as tank switching on the aircraft side 4, for example.

Since the flow rate decreases as the piping load increases, the pressure is increased with the target pressure value as the upper limit in order to maintain the target value of the flow rate.

Therefore, the operation of the oil supply control device 17 will be explained in more detail with reference to the flowchart shown in FIG.

First, the target value of flow velocity V is within the maximum allowable values of flow velocity and pressure.
The target values PO for O and pressure are set by the flow rate setting section 22 and the pressure setting section 28, and the presetting section (not shown) of the counter 42 sets the oil supply mother QO, the stop preparation residual oil ff1Qs.
Enter , perform initial settings (step ■), and start refueling (step ■). The counter 42 indicates the set fuel supply fffiQ.

Step ■), count the remaining fuel ff1QR from 1), and if this remaining fuel ff1QR is within the range of the stop preparation remaining amount QS, change the status of flag 1 to V/CPU 25 and P/CPU.
32 (step ■). Based on the status of flag 1, the V/CPU 25 compares the detected value VS of the flow velocity with its target value vO, performs a PID operation, and outputs the deviation value dv as a flow velocity width difference signal via the output port 26. input to the selector 35 (step ■). Similarly, P
/CPU 31 also compares the detected pressure value PS and its target value vO, performs PID calculation, and inputs the deviation value dp as a pressure 8 difference signal to the low selector 35 via the output port 32 (step 2). The low selector 35 compares dv and dp in the inputted flow rate and pressure deviation signals, selectively selects a low level deviation signal, and selects the low level deviation signal.
(step ■).

As a result, the opening/closing section 38 opens/closes the governor of the engine 8 by rotating the rotary actuator 40 in order to reduce deviations in flow velocity or pressure (step (2)). The flow then returns to steps ■ and ■.

As the refueling progresses and reaches the stop tit remaining oil level QS in step (2), the counter 42 indicates V/CPtJ25.
and interrupts the P/CPU 32 with flag O, causing the V/CPU 25 and P/CPU 32 to send a deceleration mode signal to the low selector 35 (step 2). As a result, the engine 8 is decelerated and enters the refueling stop preparation mode (step [phase]).

In this way, according to this embodiment, by inputting a predetermined amount of oil, flow rate, and pressure to the oil supply control device at the start of refueling, the process from the start of refueling to the end of refueling can be smoothly controlled without manual intervention. It will be possible.

In the illustrated example, all of the detection signals are transmitted using electrical signals, but some of them may be replaced with air signals, optical signals, or other signals for transmission.

"Effects of the Invention" As explained above, the refueling control device for a refueling vehicle according to the present invention constantly detects the flow velocity and pressure, and controls the engine rotation in a direction that reduces the deviation from the target value. Without relying on a high degree of personal skill on the part of the operator, both flow rate and pressure are maintained without exceeding their target values, resulting in safe, reliable and quick refueling, which is unprecedented in its kind. Its effects are remarkable and significant, such as eradicating the problems that were previously reported.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a refueling control device for a refueling vehicle showing an embodiment of the present invention, FIG. 2 is a system diagram of its refueling pipe, and FIG.
The figure is a diagram showing the state of refueling. FIG. 4 is a flowchart showing an example of control. 1...Fuel tank 1...Refueling vehicle 2...Tank 3...Refueling hose 4...Aircraft 5...Fuel intake a...Refueling pipe 8...Engine 9...Pump 15 . . . Flow rate sensor 16 . . . Pressure sensor (pressure detection means) 17 . . . Oil supply control device 19 . Means 28...Pressure setting section 35...Low selector (iU selection means) 36...Drive operation means vO...Target value of flow rate VS...Detected flow rate PO...Target value of pressure ps ...Pressure detection value Fig. 1 Fig. 2 Fig. 3'\1 Fig. 4

Claims (1)

[Scope of Claims] An electric refueling control device for a refueling vehicle in which fuel loaded in a tank is supplied to an aircraft via a refueling pipe by a pump driven by an engine, wherein each of the refueling pipes is provided with an electric refueling control device. a flow rate detection means for electrically detecting the flow rate of the fuel being supplied and a pressure detection means for electrically detecting the pressure in the fuel supply pipe; and a detection value of the flow rate detection means and a preset flow rate. a flow rate adjustment means that outputs a flow velocity deviation signal by comparing the detected value of the pressure detection means with a preset target value of pressure; and a pressure adjustment means that outputs a pressure deviation signal by comparing the detected value of the pressure detection means with a preset target pressure value. , selection means for comparing the flow velocity deviation signal and the pressure deviation signal and selectively selecting the lower level deviation signal, and setting the target values of the flow velocity and pressure based on the selection by the selection means. A refueling control device for a refueling vehicle, comprising: a drive operating means for controlling the rotation of the engine to maintain the rotation of the engine.