JPH0565195A - Refueling device - Google Patents

Abstract

(57) [Summary] [Purpose] To stabilize the operation of the flow control valve in a mixed oil supply device, maintain the accuracy of the mixing ratio and the amount of oil supply, and prevent damage to the flow control valve. [Structure] The discharge amounts of fluids from flow rate control valves V ₁ and V ₂ provided in two liquid feeding means are controlled according to a mixing ratio,
Further, the valve drive means 2 for controlling the flow rate by alternately opening and closing the flow rate control valves V ₁ and V ₂ when the discharge amount becomes smaller than the reference value.
5 is provided. The operation of the flow control valves V ₁ and V ₂ is stable during refueling at a large flow rate, so the valve opening is controlled pulse by pulse to discharge two types of fuel oil so that the desired mixing ratio is achieved. Adjust the amount. When the discharge amount is throttled in the final stage of refueling, the flow rate control valves V ₁ and V ₂ are fixed at the valve opening degree at the minimum flow rate that guarantees stable operation. Adjust the amount of refueling by controlling the valve opening time. As a result, even at the minute flow rate at the final stage of refueling, the flow rate control valve V ₁ ,
V ₂ operates without causing hunting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has two different octane numbers.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling device that refuels various types of fuel oil while controlling the flow rate so that a desired octane number is obtained, and particularly to a technique for controlling the refueling amount.

[0002]

2. Description of the Related Art An apparatus for supplying oil while mixing two kinds of liquids at a constant ratio is provided with a flow rate control valve whose valve opening is controlled by a pulse motor in a liquid supply mechanism for supplying each liquid. It is monitored whether or not the ratio of the flow rates detected by the flow rate measuring means is a set value, and if there is an error with respect to the set value, one pulse is output to the pulse motor that drives the flow control valve. It is configured to adjust the valve opening.

In such a refueling device, when the refueling operation is automatically stopped at a desired integer amount as in the case of integer refueling, the target value is reduced by narrowing the discharge amount at the stage where the refueling operation is close to the desired amount. It is configured to realize a reliable stop of refueling.

[0004]

However, the flow rate control valve used for controlling the discharge flow rate usually has a flow rate adjusting ability in the range of about 5 liters to 45 liters / minute. The operation becomes unstable for a small flow rate of 5 liters / minute or less, which is the discharge rate in the final stage of refueling, and adjusting the valve opening for about one pulse causes hunting and causes an error in the flow rate. However, there is a problem of causing wear to the flow control valve and shortening its life. On the other hand, when the flow rate is reduced, the flow rate control valve is also reduced, but the flow rate control valve is not stable for a small amount of flow rate, and there is a problem that hunting occurs and the flow rate control valve is damaged. The present invention has been made in view of such a problem, and the purpose thereof is to:
An object of the present invention is to provide a novel oil supply device capable of supplying an accurate oil supply amount with a set mixing ratio without causing hunting in the flow control valve even for a minute flow rate at the final stage of oil supply.

[0005]

In order to solve such a problem, in the present invention, the discharge amount of the fluid from the flow control valves provided in the two liquid feeding means is controlled according to the mixing ratio. The first mode and the second mode in which the flow rate control valves are alternately opened and closed to control the flow rate when the discharge amount becomes smaller than the reference value are provided.

[0006]

Since the operation of the flow rate control valve is stable during refueling at a large flow rate, the valve opening is controlled one pulse at a time to control the discharge amount of two types of fuel oil so that the desired mixing ratio is achieved. adjust. When the discharge amount is throttled at the end of refueling, each flow control valve has its valve opening fixed to the minimum flow rate that guarantees stable operation, and controls the valve opening time at this valve opening. Then
Adjust the amount of refueling. As a result, the flow rate control valve operates without causing hunting even at the minute flow rate at the final stage of refueling.

[0007]

Embodiments of the present invention will be described below in detail. FIG. 2 shows an embodiment of the present invention, in which reference numeral 1 is a liquid feeding mechanism for metering and delivering a first liquid, for example, regular gasoline,
The suction port of the pump P ₁ connected to the pump motor PM ₁ communicates with a tank (not shown) for storing regular gasoline, and the discharge port thereof is connected with a flow control valve V ₁ described later via a flow meter M _1. Has been done. The flow meter M ₁ is provided with a flow rate pulse transmitter PL ₁ and outputs the instantaneous flow rate as a pulse signal to the control device 3. The flow rate control valve V ₁ is connected to a pulse motor Va driven by a pulse signal from the control device 3, and is configured to realize a valve opening degree that matches the number of pulses.

In the figure, reference numeral 2 is a liquid feeding mechanism for metering and feeding a second liquid, for example, high octane gasoline, and like the first liquid feeding mechanism, suction of the pump P ₂ connected to the pump motor PM ₂ A tank (not shown) for storing high-octane gasoline communicates with the port, and a flow rate control valve V ₂ described later is connected to the discharge port via a flow meter M ₂ . The flow meter M ₂ is provided with a flow rate pulse generator PL ₂ ,
The instantaneous flow rate is output to the control device 3 as a pulse signal. The flow rate control valve V ₂ is connected to a pulse motor Vb driven by a pulse signal from the control device 3, and is configured to realize a valve opening degree corresponding to the number of pulses.

The discharge ports of these liquid feeding mechanisms 1 and 2 are joined to one flow path and connected to a nozzle 6 via a hose 5. A control device 3 receives a signal from a mixing ratio setting button 7 for instructing a mixing ratio of regular gasoline and high octane gasoline and a nozzle switch SW, and outputs information such as an amount of refueling to a display 9. It is like this.

FIG. 3 shows an embodiment of the above-mentioned control device, in which reference numeral 3 is a control device, and CP
The microcomputer 10 includes a U10, a ROM 11, a RAM 12, a clock signal generator 13, an interface 14, and the like. Through the interface 14, the mixing ratio setting button 7, the flow control valve driving pulse motors Va and Vb, the nozzle switch SW, Pump motor PM ₁ ,
PM ₂ , flow rate pulse transmitters PL ₁ and PL ₂ , and indicator 9
Are connected.

FIG. 1 shows the configuration of the above-mentioned control device in terms of the functions to be performed by a microcomputer.
Reference numerals 20 and 21 in the figure respectively denote a flow rate pulse transmitter PL.
₁ , counting the flow rate pulse from PL ₂ , each liquid feeding mechanism 1,
It is a counting means for calculating the integrated flow rate of the fuel oil discharged from the No. 2. The integrated flow rate obtained by each of the counting means 20 and 21 is added by the adding means 22 and output as the actual amount of oil supply to the display 9 for display.

Reference numeral 23 is a mixing ratio setting means for outputting the mixing ratio commanded by the mixing ratio setting button 7 as a signal. Reference numeral 24 is a flow rate error calculating means,
Receiving the integrated flow rates of the counting means 20 and 21 attached to the and the mixing ratio data of the mixing ratio setting means 23, the difference between them, that is, the cumulative flow rates B of the two types of fuel oil that are actually refueled.
R, BH and the sum of these two types of fuel oil (BR + BH)
And the target value of each fuel oil calculated from the set mixing ratio RR: RH, that is, the ideal value of the integrated flow rate of each fuel oil required to realize the mixing ratio set with the current amount of fuel ( BR + B
H) / RR / (RR + RH), (BR + BH) / RH / (RR +
RH) difference ΔLR = BR− (BR + BH) · RR / (RR +
RH) or ΔLH = BH- (BR + BH) ・ RH / (R
R + RH) is calculated and the error data is output to the valve drive means 25.

Reference numeral 25 denotes the above-mentioned valve drive means, which adjusts the valve opening of the flow rate control valves V ₁ and V _{2 according} to the signal from the mixing ratio setting means 23, and corresponds to the mixing ratio as shown in Table 1, for example. The initial valve opening is set on the basis of the valve opening data, and during operation, the valve opening is set to 1 by the signal from the flow rate error calculating means 24.
The first mode in which the valve is opened and closed pulse by pulse, and the discharge amount is below a specified value, for example, 5 liters / minute, and the integer calculation means 2
When a signal is output from 8, one of the flow rate control valves is closed, and the other flow rate control valve is provided with the minimum flow rate at which the flow rate control valve can be practically used, for example, 8 liters / minute. Then, the valve opening is adjusted based on this, and a second mode in which the valve opening time is controlled in proportion to the mixture ratio and each control valve when an integer value, for example 0.3 liter, is reached. Opening and refueling both oils by a signal from the quantitative calculation means 27 to an integer value at a set mixing ratio Third
It has the following modes.

[0014]

Numeral 26 is a flow rate drop detecting means which determines the flow rate based on the pulse intervals from the flow rate pulse transmitters PL ₁ and PL ₂ and outputs a signal to the integer calculating means 28 when the flow rate becomes 5 liters / minute or less. .. The integer calculating means 28 calculates the nearest integer value of the value of the adding means 22 when receiving the signal from the flow rate decrease detecting means 26, and drives the valve when the amount of oil supply up to the integer value is 0.3 liters or more. It outputs a signal to the means 25, and outputs a signal to the quantitative calculation means 27 when it reaches 0.3 liters. The quantitative calculation means 27 receives the signal from the integer calculation means 28, calculates the amount of each oil at the set mixing ratio up to an integer amount, and calculates the amount of each oil counted by the counting means 20, 21. When the value reaches the set value, a signal is output to the valve driving means 25.

Next, the operation of the apparatus thus constructed will be described with reference to FIG.
The process will be described with reference to the flowchart shown in FIG.
When the nozzle 6 is disengaged from the nozzle hook and the nozzle switch SW is turned on (step 4 in FIG. 4), the controller 3 operates the pump motors PM ₁ and PM ₂ of the liquid transfer mechanisms ₁ and ₂ , and the counting means 20. , 21 is reset and the display 9 is reset to zero (step B). In this state, when a predetermined mixing ratio RR: RH, for example, refueling for mixing regular gasoline and high octane gasoline in a ratio of 2: 1 is commanded by the mixing ratio setting button 7 and is set in the mixing ratio setting means 23 (step C), The valve driving means 25 receives the data from the mixing ratio setting means 23 and refuels in the first mode, that is, the total instantaneous flow rate is large, for example, 45.
The number of pulses that can realize the set mixing ratio of 2: 1 at liter / minute, for example, 62 pulses and 35 pulses are output to the pulse motors Va and Vb of the flow rate control valves V ₁ and V ₂ to open the valves. Adjust (step d).

When the lever of the nozzle 6 is pulled up, the nozzle 6
When the main valve of is opened, the fuel oil from each of the liquid feeding mechanisms 1 and ₂ flows into the nozzle 6 from the flow rate control valves V ₁ and V ₂ at an instantaneous flow rate that matches the valve opening degree, depending on the valve opening degree. Mixing ratio RR:
It flows into the car tank at RH. Each of these fuel oils is measured by the flowmeters M ₁ and M ₂ of the liquid feeding mechanisms 1 and ₂ and output from the flow rate pulse transmitters PL ₁ and PL _2, and the cumulative flow rate of each fuel oil is counted by the counting means 20 and 21. Calculated and adding means 2
The total amount of refueling obtained by 2 is displayed on the display 9.

During refueling in this first mode (see FIG.
Step (a)), the flow rate error calculating means 24 obtains the cumulative amount of oil supply by the liquid feeding mechanisms 1 and 2 from the counting means 20 and 21 at fixed time intervals, for example, every second, and the mixing ratio setting means 23.
The amount of regular gasoline and high octane gasoline, that is, the ideal amount, and the value of the counting means 20, 21, that is, the actual refueling of each gasoline performed up to the present, assuming that refueling was performed at a mixture ratio set to Calculate the difference from the quantity. As a result, when the actual amount of one fuel oil, for example, regular gasoline, is less than the ideal amount and the amount is 0.1 liter or more (step (b) in FIG. 5), the valve drive means A signal is output to 25 to open the flow rate control valve V ₁ for one pulse to increase the instantaneous flow rate of regular gasoline (FIG. 5, step (c)). In addition,
If the deficiency is less than 0.1 liter, that is, smaller than the resolution of the flow control valve V ₁ , no adjustment is made to the flow control valve.

On the other hand, when the regular gasoline supply amount is excessive and the excess amount is 0.1 liter or more (step 5 in FIG. 5), the flow control valve V ₁ is closed for one pulse. Reduce the flow rate of regular gasoline (Fig. 5 Step E). When the excess amount is 0.1 liter or less, the flow control valve is not adjusted. While repeating the above process, the flow control valves V ₁ and V ₂ are continuously adjusted by one pulse with respect to the initially set valve opening so as to achieve the set mixing ratio, and the oil is supplied at a large flow rate. To do.

When refueling in the first mode progresses and the tank becomes almost full and it is desired to stop refueling at the next integer value, the nozzle lever is slightly returned to throttle the flow rate to about 5 liters / minute. And (FIG. 5 step (a)), the flow rate decrease detecting means 26 detects that the flow rate is restricted by the flow rate pulse signals from the flow rate pulse transmitters PL ₁ and PL ₂ and outputs it to the integer calculating means 28. .. The integer calculating means 28 calculates the most significant integer value based on the flow rate from the adding means 22, and when the value is, for example, 0.3 liter or more (step F), the valve driving means 25 receives the second value. Command refueling in the mode. The valve driving means 25 adjusts the valve opening degree so that _one flow control valve V ₁ is closed and the other flow control valve V ₂ is operated at a minimum flow rate, for example, 8 liters / minute. (Step). As a result, only high octane gasoline from the liquid feeding mechanism 2 is refueled.

In this state, refueling is performed only by one of the liquid feeding mechanisms and two types of gasoline are not mixed, so that the amount of refueling fed by each liquid feeding mechanism is managed by the refueling time. Become. In this case, regular gasoline and high-octane gasoline are mixed at a ratio of 2 to 1, so the remaining amount to be refueled from now on should be proportionally divided between regular gasoline and high-octane gasoline in a ratio of 2 to 1. The remaining amount ΔL is 2 × ΔL / (2 + 1),
Divide into 1 × ΔL / (2 + 1), and calculate the times T ₁ and T ₂ required to refuel these amounts with the liquid feeding mechanisms ₁ and ₂ .

In this way, when the refueling time of high octane gasoline at 8 liters per minute reaches T ₁ seconds (step S), the flow control valve V ₂ is closed this time while the flow control valve V ₁ is kept constant. The valve is opened so that the flow rate becomes, for example, 8 liters / minute (step), and regular gasoline is supplied for a time T ₂ seconds (step N). In this way, the second flow rate control valve is alternately opened and closed to control the flow rate.
Refueling in the mode is executed. In addition, refueling in this second mode is continued until the refueling nozzle is throttled to 5 liters / minute or less (Fig. 5 step a) and 0.3 liters before the integer amount (figure 5 step f). Be done. As a result, the flow rate control valves V ₁ and V ₂ execute refueling with a minute flow rate at the set mixing ratio in the practical valve opening degree region where hunting does not occur.

When the refueling in the second mode progresses to 0.3 liters before the integer amount (step F in FIG. 5), the integer calculating means 28 outputs a signal to the quantitative calculating means 27,
The quantitative calculation means 27 also outputs a signal to the valve drive means 25. In response to this signal, the valve driving means 25 opens the flow rate control valves V ₁ and V ₂ so that the flow rate is 8 liters / minute.
Further, the quantitative calculation means 27 calculates the correct oil supply amount of each oil from the flow rate from the addition means 22 and the mixing ratio of the mixing ratio setting means 23 to the nearest upper integer value (step in FIG. 6).
Le). That is, if the regular gasoline supply amount at this point is 9.70 liters, the most significant integer amount is 10 liters, and the mixing ratio is 2: 1. Therefore, regular gasoline is 10 × 2 / 3 = 6.67 liters, high octane gasoline is 10 × 1/3 =
It is calculated to be 3.33 liters.

As a result, the liquid feeding mechanisms 1 and 2 start the third mode, that is, refueling at a minute flow rate. In this state, when the regular gasoline counted by the counting means 20 reaches 6.67 liters (Fig. 6 step
E) A signal is output from the quantitative calculation means 27 to the valve drive means 25, and the flow control valve V ₁ is closed to stop the refueling of regular gasoline (step W in FIG. 6). Then, when the high octane gasoline reaches 3.33 liters (Fig. 6)
Step f), the flow control valve V ₂ is closed and all refueling is completed (step 6 in FIG. 6). When the high octane gasoline reaches 3.33 liters first (step 6 in FIG. 6), the flow control valve V ₂ is closed (step 6 in FIG. 6), and regular gasoline is 6.6.
The flow control valve V ₁ is closed at the stage when 7 liters have been reached (step step) (step 6 in FIG. 6).

As described above, when the third mode is entered, the amount of oil supply is controlled based on the integrated flow rate without depending on the valve opening control of the flow rate control valves V ₁ and V _2. It is possible to refuel with a minute flow rate suitable for refueling a minute amount of about 1 liter, and it is possible to correct the mixing ratio error that has occurred in refueling up to now, with a highly accurate mixing ratio, and with a highly accurate liquid supply amount. Refueling can be realized.

[0026]

As described above, according to the present invention, the first mode for controlling the discharge amount of the fluid from the flow rate control valves provided in the two liquid feeding means according to the mixing ratio, and the reference value. Since a second mode for controlling the flow rate by alternately opening and closing each flow rate control valve when the discharge rate becomes smaller is provided, even when the discharge rate from the nozzle is throttled A practical control range can be used to control minute flow rates without causing hunting.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention with the functions to be performed by a microcomputer.

FIG. 2 is a configuration diagram showing an embodiment of an oil supply apparatus to which the present invention is applied.

FIG. 3 is a block diagram showing a signal processing system of the apparatus shown in FIG.

FIG. 4 is a flowchart showing a basic operation of the above apparatus.

FIG. 5 is a flowchart showing a flow rate adjusting step in the same apparatus.

FIG. 6 is a flowchart showing a mixing error correction process in the same apparatus.

[Explanation of symbols]

1, 2 Liquid feeding mechanism 3 Control device 7 Mixing ratio setting button 9 Display V ₁ , V ₂ Flow control valve Va, Vb Pulse motor for driving flow control valve

[Procedure amendment]

[Submission date] June 5, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

In this state, refueling is performed by only one of the liquid feeding mechanisms and two types of gasoline are not mixed, so that the amount of refueling fed by each liquid feeding mechanism is managed by the refueling time. Become. In the present case, the regular gasoline and the high octane gasoline are mixed and refueled in a ratio of 2 to 1, so that the regular gasoline and the high octane gasoline to be refueled thereafter are proportionally distributed in a ratio of 2 to 1 (for example, the amount ΔL). 0.2 L) is 2 × ΔL /
Divide into (2 + 1), 1 × ΔL / (2 + 1), and calculate the times T ₁ and T ₂ required to refuel these amounts with the liquid feeding mechanisms ₁ and ₂ .

Claims (1)

[Claims] 1. A first mode for controlling the discharge amount of fluid from a flow rate control valve provided in two liquid feeding means according to a mixing ratio, and each of the above-mentioned modes when the discharge amount is smaller than a reference value. An oil supply device comprising a second mode for controlling the flow rate by alternately opening and closing the flow rate control valve.