JPH054700A - Oil supply apparatus - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] 2 without causing hunting in the control system.
Controls the mixing ratio of different liquids with high accuracy. [Structure] An instantaneous flow rate error calculating means 30 for calculating a difference between an instantaneous flow rate of fluid from the flow rate control valves V ₁ and V ₂ provided in two liquid feeding mechanisms and an ideal instantaneous flow rate corresponding to a set mixing ratio. , Flow rate error calculating means 24 for calculating the difference between the integrated flow rate of the fluid discharged from each of the flow rate control valves V ₁ and V ₂ and the ideal integrated flow rate with respect to the set mixing ratio, and the difference between the instantaneous flow rate and the integrated flow rate. The storage means 26 storing the valve opening correction pulse number for correcting the opening degree of the flow control valves V ₁ and V ₂ in accordance with the above, and the valve opening correction pulse number read from the storage means 26 for each flow rate. the control valve V _1, V ₂ a plurality of times to alternately output a valve driving means 25 for correcting the valve opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has two different octane numbers.
The present invention relates to an oil supply device for supplying fuel oil of a type while controlling the flow rate so as to obtain a target octane number.

[0002]

2. Description of the Related Art An apparatus for refueling while mixing two kinds of liquids at a constant ratio, for example, as shown in Japanese Patent Laid-Open No. 61-21400, opens a valve by a pulse motor in a liquid feeding mechanism for supplying each liquid. Equipped with a flow rate control valve that controls the flow rate, monitors whether the ratio of the flow rates detected by the flow rate measuring means of the liquid feeding mechanism is a set value, and if there is an error with respect to the set value, The pulse motor that drives the flow rate control valve is configured to output one pulse at a time to adjust the valve opening.

[0003]

Thus, while constantly comparing the ratio of the discharge amount from each liquid feeding mechanism with the set value, the valve opening is adjusted one pulse at a time when an error occurs. Therefore, there is a problem that a lag occurs between the manipulated variable and the actual flow rate due to the response delay of the flow rate control valve and the pipeline, and hunting occurs in the control system. Furthermore, since the ratio of the total discharge amount of each liquid feeding mechanism is used as a control parameter, it takes time to match the mixing ratio with the set value, and if refueling is stopped during control, there will be an error in the mixing ratio. There was a problem of including. The present invention has been made in view of such problems, and an object thereof is to provide a novel oil supply device capable of controlling a mixing ratio with high accuracy without causing hunting in a control system. It is in.

[0004]

In order to solve such a problem, according to the present invention, an ideal fluid flow rate control valve provided in two liquid feeding means and an ideal fluid flow rate corresponding to a set mixing ratio are provided. An instantaneous flow rate error calculating means for calculating a difference from the instantaneous flow rate; a flow rate error calculating means for calculating a difference between the integrated flow rate of the fluid discharged from each of the control valves and an ideal integrated flow rate with respect to a set mixing ratio; Of the valve opening correction pulse for correcting the flow control valve corresponding to the difference between the flow rate control valve and the difference between the integrated flow rate and the valve opening correction pulse number read from the storage means. The valve is provided with a valve driving means for correcting the valve opening degree by alternately outputting the valve a plurality of times.

[0005]

[Operation] Since each flow control valve is controlled by taking into consideration not only the error of the integrated flow rate but also the instantaneous flow rate, the mixing ratio can be corrected to the set value in a short time, and when refueling is stopped midway. Also supplies liquid with a mixing ratio that matches the set value with high accuracy, and adjusts the two flow rate control valves alternately alternately with the smallest possible operation amount to delay the response due to valve opening adjustment. Is kept small to prevent hunting.

[0006]

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) that stores the first liquid, for example, regular gasoline, and the discharge port has a flow rate to be described later via a flow meter M _1. The control valve V ₁ is connected. The flow meter M ₁ is provided with a flow rate pulse transmitter PL ₁
One pulse is output to the control device 3 for each instantaneous flow rate of, for example, 0.01 liter. Flow 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.

Reference numeral 2 denotes a liquid feeding mechanism for metering and feeding a second liquid, for example, high octane gasoline. Like the first liquid feeding mechanism, the suction port of the pump P ₂ connected to the pump motor PM ₂ has a suction port. , A second liquid, for example, a tank (not shown) for storing high-octane gasoline is communicated, 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 so as to output one pulse to the control device 3 for each instantaneous flow rate, for example, 0.01 liter. Flow control valve V
Reference numeral 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 matching the number of pulses.

The discharge ports of the liquid feeding mechanisms 1 and 2 are joined to one flow path and connected to a nozzle 6 via a hose 5. The control device 3 to be described later displays a mixture ratio setting button 7 for instructing a mixture ratio of regular gasoline and high octane gasoline, a nozzle switch SW, and a numeric keypad 8 for setting a preset oil supply amount, and information such as a liquid supply amount. The display 9 is connected.

FIG. 3 shows an embodiment of the above-mentioned control device. In the figure, reference numeral 3 is a microcomputer constituting the control device, which includes a CPU 10, a ROM 11 and an R.
It is composed of an AM 12, a clock signal generator 13, and an interface 14, and through the interface 14, a numeric keypad 8, a mixing ratio setting button 7, a mixing ratio display lamp 7a,
Flow control valve driving pulse motors Va, Vb, nozzle switch SW, pump motors PM ₁ , PM ₂ flow pulse generator P
L ₁ , PL ₂ and the display 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 rates obtained by the counting means 20 and 21 are added by the adding means 22 and output to the display 9 as the actual liquid supply amount.

A mixing ratio setting means 23 outputs the mixing ratio instructed by the mixing ratio setting button 7 as a signal. Reference numeral 24 is a flow rate error calculating means,
The total flow rates B ₁ and B _{2 of the} two types of fuel oil that are actually refueled are received by 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 24. And the sum of these two types of fuel oil (B ₁ + B ₂ )
The target value of each fuel oil calculated from the mixture ratio RR: RH set as follows, that is, the ideal value of the integrated flow rate of each fuel oil required to realize the mixture ratio set by the current fuel supply amount (B ₁ + B ₂ )
・ RR / (RR + RH), (B ₁ + B ₂ ) ・ RH / (RR + R
H) difference ΔL = B ₁ − (B ₁ + B ₂ ) · RR / (RR + R
H), or _{B 2 - (B 1 + B} 2) · RH / (RR + RH)
Is calculated and used as flow rate error data.
It is configured to output to.

Reference numeral 25 is the above-mentioned valve driving means, which receives the mixing ratio data RR: RH from the mixing ratio setting means 23 at the beginning of the liquid supply, and has a number corresponding to the valve opening corresponding to this mixing ratio. The pulse signal is read out from the first area of the storage means 26, which will be described later, and output to the flow rate control valves V ₁ and V _2, and after the start of refueling, there are two types of data, an instantaneous flow rate error and an integrated flow rate error. Then, the second area of the storage means 26 is accessed, and in order to correct the valve opening, each of the flow rate control valves V ₁ and V _{2 is} alternately alternated with the smallest possible number of pulses.
In this embodiment, each pulse is driven in the valve opening direction or the valve closing direction.

As shown in Table 1, the storage means 26 keeps the discharge flow rate from the nozzle constant, for example, 60 liters / minute, while keeping the flow rates from the liquid feed mechanisms 1 and 2 in agreement with the mixing ratio. A first area in which the number of valve opening pulses for instructing the valve opening of each of the flow rate control valves V ₁ and V ₂ is stored, and an instantaneous flow rate error detection means 30 and a flow rate error detection means, which will be described later, as shown in Table 2. The second area stores the data defining the number of pulses for adjusting the valve opening degree by the two data from 24.

[0014]

[Table 1]

[0015]

[Table 2]

Reference numeral 30 is the above-mentioned instantaneous flow rate error calculating means, which is flow rate data per unit time from the instantaneous flow rate calculating means 31, 32 connected to the flow rate pulse transmitters PL ₁ , PL ₂ of the liquid feeding mechanisms ₁ , ₂ . Based on the mixing ratio data from the mixing ratio setting means 23, the difference between the instantaneous flow rate ratio and the mixing ratio data is output to the valve driving means 25 as valve opening degree data.

Next, the operation of the apparatus configured as described above will be described with reference to FIG.
It will be described based on the flowchart shown in FIG. Nozzle 6
When the nozzle switch SW is turned on (step a), the controller 3 causes the liquid transfer mechanism 1,
2 pump motors PM ₁ and PM ₂ are activated,
The display 9 is reset to zero (stepro). In this state, when the mixing ratio setting button 7 is used to instruct to mix and feed a predetermined mixing ratio RR: RH, for example, regular gasoline and high octane gasoline in a ratio of 2: 1, the valve driving means 25 causes the mixing ratio setting means 23 The storage means 2 receives the mixing ratio data.
The number of pulses corresponding to this mixing ratio, 62 pulses and 35 pulses in this embodiment, are read out from the first region 6 and output to the flow control valves V ₁ and V ₂ . As a result, the flow rate control valves V ₁ and V ₂ are adjusted to the valve opening degrees at which the flow rate ratio of the fuel oil to be discharged is 2: 1 (step d).

At this stage, when the refueling lever is pulled up and the main valve of the nozzle 6 is opened, the fuel oil from each of the liquid feeding mechanisms 1 and ₂ matches the valve opening degree from the flow rate control valves V ₁ and V _2. It flows into the nozzle 6 at the instantaneous flow rate, and flows into the vehicle tank at the mixing ratio RR: RH that matches the valve opening data. Each of these fuel oils is measured by the flow meters M ₁ and M ₂ of the liquid feeding mechanisms 1 and 2, the integrated flow rate of each fuel oil is calculated by the counting means 20 and 21, and the total oil supply amount is calculated by the adding means 22. Is displayed on the display unit 9.

However, when signals of 68 pulses / sec and 31 pulses / sec, for example, are output from the instantaneous flow rate calculating means 31, 32, the instantaneous flow rate error calculating means 30 causes the mixing ratio setting means 23 to mix the signals. A difference 68- (31) from the ideal value for realizing the set mixing ratio is obtained by the ratio data 2: 1 and the outputs 68 pulse / second and 31 pulse / second from the instantaneous flow rate calculating means 31, 32. × 2) = 6 is calculated and output to the valve driving means 25. This value of 6 pulses is
The instantaneous flow rate of the first liquid feeding mechanism 1 is 6 pulses, that is, 0.06, with respect to the ideal instantaneous flow rate for realizing the mixing ratio of 2: 1.
It shows that there is an excess of liter / second.

The flow rate error calculating means 24 comprises counting means 20, 2
The error of the mixing ratio is calculated based on the flow rate of 1 and the mixing ratio data from the mixing ratio setting means 23. For example, the integrated flow rate of the liquid feeding mechanism 1 is 11.13 liters, that is, 1113 pulses,
The cumulative flow rate of the liquid feeding mechanism 2 is 5.51 liters, that is, 5
Assuming 51 pulses, the flow rate error calculating means 24
The error is calculated based on the mixing ratio data 2: 1 from the mixing ratio setting means 23 and the integrated flow rates 1113 and 551 pulses of the counting means 20 and 21. That is, 1113- (55
1 × 2) = 11 is calculated. This data shows that the integrated flow rate from the first liquid feeding mechanism 1 is 11 with respect to the set mixing ratio.
It means that there is an excess of pulse, that is, 0.11 liter.

On the other hand, the instantaneous flow rate of the fuel oil discharged from each of the liquid feeding mechanisms 1 and 2 is detected by the instantaneous flow rate calculation means 31 and 32 and output to the instantaneous flow rate error calculation means 30. That is, the flow rate pulse transmitters PL ₁ and PL ₂ are both 0.01
If one pulse is output per liter and the instantaneous flow rate from the nozzle is set to 60 liters / minute, the instantaneous flow rate calculation means 31 connected to each of the liquid delivery devices 1 and 2
(60 liters / minute) / {(60 seconds) × (0.01 pulses / liter)} × {2 / (2 + 1)} pulses
The instantaneous flow rate calculation means 32 is (60 liters / minute) /
{(60 seconds) × (0.01 pulse / liter)} × {1
If / (2 + 1)} pulses are output per second, the oil is supplied at an accurate mixing ratio.

The valve driving means 25 is a flow rate error calculating means 24.
And the correction data is read from the storage means 26 based on the 11 pulses and 6 pulses of the error data calculated by the instantaneous flow rate error calculating means 30 (step E). That is, the correction data for squeezing the flow control valve of one of the liquid feeding mechanisms 1 by 5 pulses is read from the intersection of the row corresponding to the error 11 pulse of the integrated flow rate and the column corresponding to the error data 6 pulse of the instantaneous flow rate. Subsequently, the control device 3 determines which of the liquid transfer mechanisms has an excessive flow rate, and when the flow rate of the first liquid transfer mechanism 1 is large (step F), whichever of the liquid transfer mechanisms is most recent. It is determined whether the flow control valves V ₁ and V ₂ of the mechanism have been driven (step). When the most recently opened flow control valve is the flow control valve V ₁ of the first liquid transfer mechanism 1,
The flow control valve V ₂ of the second liquid feeding mechanism 2 is opened for one pulse, and subsequently the flow control valve V ₁ of the first liquid feeding mechanism 1 is closed for one pulse. That is, the valve driving means 25 closes the valve for one pulse in order to throttle the flow rate of the excessively supplied regular gasoline in the liquid feed mechanism 1. Then, the flow control valve V ₂ of the liquid feeding mechanism 2 is opened for one pulse in order to increase the amount of lacking high octane gasoline. Further, in order to reduce the flow rate of regular gasoline, set the flow control valve V ₁ of the liquid feeding mechanism ₁ to 1
Close the valve for the pulse (step).

In this way, one flow control valve is opened for one pulse, and then the other flow control valve is closed for one pulse. The flow control valves are alternately opened and closed one pulse at a time. The instantaneous flow rate of the liquid sending mechanism 1 is 5 pulses, that is, 0.05
It is controlled so that it decreases only by liter / second. In this way, not only the ratio of the total amount of the two types of liquids already refueled,
Since the valve openings of the flow rate control valves V ₁ and V ₂ are controlled in consideration of the ratio of the instantaneous flow rates, the mixture ratio can be controlled so as to reach the set value in a short time. When the most recently operated flow control valve is the flow control valve V ₁ of the other liquid transfer mechanism 1, the flow control valve V ₂ is opened for one pulse, and then the other liquid transfer mechanism 1 is opened. The flow control valve V ₁ is closed for one pulse, and the flow control valve V ₂ is opened for one pulse (step), so that the flow control valves V ₁ and V ₂ of the liquid transfer mechanisms ₁ and ₂ are connected. One pulse is alternately closed for each pulse, and the other valve is opened to control so as to relatively cause a predetermined flow rate difference. As a result, the flow rate discharged from the nozzle 6 is adjusted to the instantaneous flow rate required to realize the set mixing ratio without changing.

In this way, the error of the mixing ratio is determined at a predetermined time interval and the corrected data is read (step E). As a result, when the amount of the second liquid, that is, high octane gasoline, becomes excessive (step S), one pulse is alternately supplied from the flow control valve that is different from the most recently operated flow control valve as described above. The total instantaneous flow rate of both the liquid feeding mechanisms 1 and 2 is kept constant by opening and closing (stepping and waving), and the flow rate between the two is adjusted.

When the nozzle 6 is returned to the nozzle hook and the nozzle switch SW is turned off after the predetermined amount of oil has been supplied (step S), the flow control valves V ₁ and V ₂ are closed and the pump motor PM ₁ , PM ₂ is stopped (step yo).

In this embodiment, the flow control valve is alternately opened and closed one pulse at a time when the flow rate is corrected. However, the total number of pulses corresponding to the correction amount is divided into at least a plurality of pulses, and this is adjusted for each flow rate control. Alternate to each valve, 1 for each valve
It is obvious that the same effect can be obtained by reducing the control amount of the rotation as much as possible. In other words, the correction amount is 1
If it is 0 pulse, one flow control valve is closed by 2 pulses and the other flow control valve is opened by 2 pulses twice, and one flow control valve is closed by 1 pulse. However, the other flow rate control valve may be opened by one pulse.

[0027]

As described above, according to the present invention, the difference between the instantaneous flow rate of the fluid from the flow control valves provided in the two liquid feeding means and the ideal instantaneous flow rate corresponding to the set mixing ratio is calculated. And a flow rate error calculating means for calculating the difference between the integrated flow rate of the fluid discharged from each flow rate control valve and the ideal integrated flow rate for the set mixing ratio, and the difference between the instantaneous flow rate and the integrated flow rate. And a storage means for storing the valve opening correction pulse number for correcting the flow control valve in correspondence with the flow control valve, and the valve opening correction pulse number read from the storage means for each flow control valve divided into plural times and alternately. Since it is equipped with a valve drive unit that adjusts the valve opening by outputting it to each flow control valve in consideration of not only the error of the integrated flow rate but also the instantaneous flow rate, the mixing ratio can be set to the set value in a short time. Not only can it be fixed, but two Adjusted by a small operation amount as much as possible the amount control valve in a relatively alternately decreasing the accompanying response delay in valve opening adjusted by it is possible to prevent 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.

[Explanation of Codes] 1, 2 Liquid sending mechanism 3 Control device 7 Mixing ratio setting button 9 Display V ₁ , V ₂ Flow rate control valve Va, Vb Pulse motor for driving flow rate control valve

Claims (1)

Claim: What is claimed is: 1. An instantaneous flow rate error calculation for calculating a difference between an instantaneous flow rate of a fluid from flow rate control valves provided in two liquid feeding means and an ideal instantaneous flow rate corresponding to a set mixing ratio. Means for calculating the difference between the integrated flow rate of the fluid discharged from each of the control valves and the ideal integrated flow rate with respect to the set mixing ratio, and the flow rate error calculation means corresponding to the difference between the instantaneous flow rate and the difference between the integrated flow rates. Storage means for storing the valve opening correction pulse number for correcting the flow control valve, and the valve opening correction pulse number read from the storage means are output alternately to each flow control valve in a plurality of times. An oil supply device comprising valve drive means for correcting the valve opening degree.