JP4520919B2 - Liquid supply device - Google Patents

Description

  The present invention relates to a liquid supply apparatus, and more particularly to a liquid supply apparatus configured to supply different types of liquids used in connection therewith.

  For example, in a liquid supply device such as an oil supply device that supplies fuel (gasoline or light oil) to a fuel tank (supplied body) of an automobile or the like, the concentration of oil vapor (vapor) in the fuel tank is detected to detect the liquid in the fuel tank. The seed determination is performed, and refueling is permitted when the liquid type determination result indicates that the liquid type matches (see, for example, Patent Document 1).

In recent years, a method for purifying exhaust gas discharged from a diesel engine with urea water has been developed as a countermeasure for exhaust gas of a vehicle equipped with a diesel engine using light oil as fuel. In this exhaust gas countermeasure vehicle, a fuel tank for light oil and a urea tank are mounted, and urea water is replenished to the urea tank when light oil is supplied to the fuel tank at a filling station or the like.
JP-A-5-262208

  In the conventional liquid supply apparatus, when supplying to each tank using two supply systems for supplying different types of liquids, a sensor for determining the liquid type of the tank supplied for each supply system is provided. Preventing contamination (foreign liquid mixture accident) is being studied.

  However, if a sensor is provided for each supply system, the number of parts increases and the configuration becomes complicated, and there is a problem that more labor is required for maintenance such as inspection and repair.

  Therefore, an object of the present invention is to provide a liquid supply apparatus that solves the above-described problems.

  In order to solve the above problems, the present invention has the following means.

The invention according to claim 1 is a liquid supply device that supplies light oil and urea water to each of a fuel tank for light oil and a urea tank for urea water mounted on a vehicle,
A light oil supply means for supplying light oil to the fuel tank ;
Urea water supply means for supplying urea water to the urea tank , subject to input of a supply permission signal ;
Light oil determination means for determining whether or not the liquid stored in the fuel tank is light oil ;
Wherein while allowing the supply of light oil from diesel fuel supply means, outputting the supply permission signal to the urea water supply means when the liquid type which is determined by the previous SL gas oil determination means determines that the gas oil Control means for permitting the supply of light oil and urea water ,
And characterized in that it comprises a.

The invention according to claim 2 is provided with a liquid type determination release switch that is operated when the determination by the light oil determination means is unnecessary,
The urea water supply means enables supply of urea water to the urea tank regardless of whether or not the supply permission signal is input when the liquid type determination release switch is operated. To do.

According to the present invention, when the liquid type determined by the light oil determining means is determined to be light oil, the supply permission signal is output to the light oil supply means and the urea water supply means to permit the supply of light oil and urea water. Therefore, the configuration can be simplified as compared with the case where the light oil supply unit and the urea water supply unit are separately determined , and the maintenance burden can be reduced.
Further, according to the present invention, when the liquid type determination release switch is operated, the urea water can be supplied to the urea tank regardless of whether the supply permission signal is input. It is possible to supply only urea water while omitting the determination of the vapor concentration by vapor suction.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a liquid supply apparatus according to the present invention. As shown in FIG. 1, the liquid supply apparatus 10 supplies a first metering machine (first supply system) 12 that supplies light oil (first liquid) and urea water (second liquid). And a second weighing machine (second supply system) 14.

  The first weighing machine 12 includes a light oil supply nozzle 20 hooked on a nozzle hook 18, a setting unit 22 for setting a liquid type and an oil supply amount, and a display unit 24 for displaying an oil supply amount and an oil supply amount. , An instrumentation unit 25 housed in the housing, a control unit 26 that integrates flow rate pulses from the flowmeters of the instrumentation unit 25 to control the oil pump and the solenoid valve (both not shown), and liquid type determination And a liquid type determination canceling switch 28 that is operated when refueling without carrying out refueling. In addition, although only the fuel oil nozzle 20 for light oil is shown in figure in the 1st measuring machine 12, it is good also as a structure provided in parallel with the fuel nozzle which supplies other fuels (for example, gasoline, kerosene, etc.). .

  In addition, the first weighing machine 12 includes a vapor suction pump that sucks vapor in a fuel tank (not shown) mounted on the vehicle via a fuel nozzle 20 and a liquid type detection sensor (liquid that detects vapor concentration). Seed detecting means) is provided inside the housing. Since the vapor suction pump and the liquid type detection sensor are well-known techniques, the description thereof is omitted here (for example, see Japanese Patent Application Laid-Open No. 8-217200).

  The second weighing machine 14 includes a storage tank 30 that stores a liquid (urea water) in a lower part of the casing, and an instrumentation unit 32 that is provided above the storage tank 30. Further, the second weighing machine 14 displays on the front surface of the housing the urea water supply nozzle 34 hooked on the nozzle hook 33, the setting unit 36 for setting the supply amount, the supply amount and the supply amount. A display unit 38, a control unit 40 that integrates flow pulses from a flow meter provided in the instrumentation unit 32 to control a replenishment pump and a solenoid valve (both not shown), and urea without performing liquid type determination A liquid type determination release switch 42 which is operated when water is replenished.

  The control unit 26 of the first weighing machine 12 and the control unit 40 of the second weighing machine 14 are composed of a microcomputer or the like, and are connected to a POS device 46 via a communication cable 44 so as to be communicable. The control units 26 and 40 are also communicably connected via the communication cable 44. In this embodiment, the weighing machines 12 and 14 are provided separately. However, the weighing machines 12 and 14 may be provided in the same housing.

  FIG. 2 is a block diagram showing each device of the first weighing machine 12. As shown in FIG. 2, the setting unit 22, the display unit 24, the liquid type determination release switch 28, the oil supply pump 50, the electromagnetic valve 52, the flow meter 53, the vapor suction pump 54, the liquid type are included in the control unit 26. A detection sensor 56, a nozzle switch 58, a communication unit 59, and the like are connected.

  FIG. 3 is a block diagram showing each device of the second weighing machine 14. As shown in FIG. 3, the control unit 40 includes the setting unit 36, display unit 38, liquid type determination release switch 42, replenishment pump 60, flow meter 61, solenoid valve 62, nozzle switch 64, and communication unit 66. Etc. are connected. Accordingly, since the second weighing machine 14 is not provided with a liquid type determination function, the configuration of the second weighing machine 14 can be simplified, and the maintenance work can be reduced accordingly. Yes.

Here, an operation procedure performed by an attendant (or driver) of the gas station using the liquid supply apparatus 10 will be described.
(Procedure 1) When a vehicle equipped with a diesel engine arrives, first, setting of the liquid type to be supplied by the setting unit 22 and the amount of oil supply are input to set the first liquid supply condition.
(Procedure 2) The fueling nozzle 20 of the weighing machine 12 is inserted into a fueling port of a fuel tank (not shown) of the vehicle. Thereby, the liquid type determination (determination of whether or not the liquid type (light oil) that can be supplied from the fuel supply nozzle 20 matches the liquid type stored in the fuel tank). When the liquid type determination result is the same as the liquid type, refueling of the light oil is started.
(Procedure 3) When the set amount of oil is supplied to the fuel tank and the supply of light oil is completed, the oil supply nozzle 20 is returned to the nozzle hook 18 of the measuring machine 12.
(Procedure 4) The supply amount of urea water is input by the setting unit 36 to set the second liquid supply condition.
(Procedure 5) The replenishment nozzle 34 of the weighing machine 14 is inserted into the supply port of the urea tank (not shown) of the vehicle. When the liquid type determination result of the weighing machine 12 (the liquid type determination result in the above-described procedure 2) matches the liquid type, the supply of urea water as the second liquid is permitted and the supply of urea water is started. .
(Procedure 6) The set supply amount is supplied to the urea tank. Then, when the supply of the set supply amount is completed, the supply nozzle 34 is returned to the nozzle hook 33 of the weighing machine 14. This completes the supply of light oil and urea water.

  Here, the first liquid supply control process 1 executed by the control unit 26 of the first weighing machine 12 in the liquid supply apparatus 10 configured as described above will be described with reference to the flowchart shown in FIG.

  First, a staff member (or driver) at the gas station inputs the liquid type and the supply amount by operating the setting unit 22, and then the fuel nozzle 20 is removed from the nozzle hook 18 of the first measuring machine 12, and the fuel of the vehicle Inserted into the tank. When the refueling nozzle 20 is removed from the nozzle hook 18 and the nozzle switch 58 is turned off in S1-1 shown in FIG. 4, the control unit 26 of the first weighing machine 12 proceeds to S1-2, and the setting unit 22 The liquid type and supply amount input by the operation are set as the first liquid supply condition.

  In the next S1-3, it is checked whether or not the liquid type determination release switch 28 has been turned on. In S1-3, when the liquid type determination release switch 28 is OFF, the process proceeds to S1-4, and the vapor suction pump 54 is activated. Thereby, the vapor remaining in the fuel tank is sucked through the fuel supply nozzle 20 and supplied to the liquid type detection sensor 56.

  In S1-3, when the liquid type determination release switch 28 is on, it is necessary to cancel the liquid type determination and supply light oil for some reason. The process is omitted and the process proceeds to S1-7.

  In S1-5, the vapor concentration measurement value output from the liquid type detection sensor 56 is compared with a predetermined value registered in advance to check whether or not the vapor concentration measurement value matches the predetermined value. In S1-5, when the vapor concentration measurement value matches the specified value, it is determined that the fuel tank is for light oil (first liquid), and the process proceeds to S1-6.

  In S1-6, a liquid type confirmation OK signal is transmitted to the second weighing machine 14 on condition that the vapor concentration measurement value matches the specified value. In S1-7, it is checked whether or not the first liquid supply permission signal is received from the POS device 46. When the nozzle switch 58 is turned off, the POS device 46 outputs a supply permission signal as a counter.

  In S1-7, when the first liquid supply permission signal is received from the POS device 46, the process proceeds to S1-8 to start the oil supply pump 50 and open the electromagnetic valve 52 to supply light oil. Start. Subsequently, in S1-9, the flow rate pulses output from the flow meter 53 are integrated to integrate the supply amount of light oil.

  In the next S1-10, it is checked whether or not the measured flow value of the light oil has reached a preset value. If the light oil flow rate measurement value has not reached the preset value, the process proceeds to S1-11 to check whether the nozzle switch 58 is on. In S1-11, when the nozzle switch 58 is not turned on, it is still being refueled, so the process returns to S1-9 and the processes after S1-9 are executed again.

  In S1-10, when the light oil flow rate measurement value reaches a preset set value, or when the nozzle switch 58 is turned on in S1-11, the supply of the light oil is terminated. Proceeding to 12, the oil pump 50 is stopped, and the solenoid valve 52 is closed to stop the supply of light oil. This ends the current process.

  In S1-5, if the measured value of the vapor concentration does not match the specified value, the fuel tank is not for light oil, so the process proceeds to S1-13 and a supply stop signal is transmitted to the second weighing machine 14. To do. Subsequently, in S1-14, a liquid type error (liquid type mismatch) is displayed on the display unit 24, and at the same time, it is notified by voice that the liquid type error has occurred.

  In step S1-15, it is checked whether the nozzle switch 58 is on. In S1-15, when the nozzle switch 58 is on, the nozzle hook 18 of the fueling nozzle 20 has been returned, and thus the current process ends.

  FIG. 5 is a flowchart of the second liquid supply control process 1 executed by the control unit 40 of the second weighing machine 14. First, the supply amount is input by operating the setting unit 36 of the second weighing machine 14, and then the replenishing nozzle 34 is removed from the nozzle hook 33 of the second weighing machine 14 and inserted into the urea tank of the vehicle. When the supply nozzle 24 is removed from the nozzle hook 33 and the nozzle switch 64 is turned off in S2-1 shown in FIG. 5, the control unit 40 of the second weighing machine 14 proceeds to S2-2 and the setting unit 22 The supply amount input by the operation is set as a supply condition.

  In the next S2-3, it is checked whether or not the liquid type determination release switch 42 has been turned on. In S2-3, when the liquid type determination release switch 42 is OFF, the process proceeds to S2-4, and it is checked whether a supply start permission signal is received from the first weighing machine 12. In S2-3, when the liquid type determination release switch 42 is on, it is necessary to cancel the liquid type determination and replenish urea water for some reason, so the process of S2-4 is omitted. And it moves to S2-5.

  If the liquid type confirmation OK signal is received from the first weighing machine 12 in S2-4, the process proceeds to S2-5, where the second liquid supply permission signal is received from the POS device 46. Check whether or not. In the POS device 46, when the nozzle switch 64 is turned off, a supply permission signal is output as a counter.

  In S2-5, when a supply permission signal is received from the POS device 46, the process proceeds to S2-6, where the replenishment pump 60 is activated and the electromagnetic valve 62 is opened to supply urea water (second liquid). Start supplying. Subsequently, in S2-7, the flow rate pulses output from the flow meter 61 are integrated to integrate the supply amount of light oil.

  In the next S2-8, it is checked whether or not the measured flow value of urea water has reached a preset value. When the urea flow rate measurement value does not reach the preset value, the process proceeds to S2-9 to check whether the nozzle switch 64 is on. If the nozzle switch 64 is not on in S2-9, it is still being refueled, so the process returns to S2-7, and the processes after S2-7 are executed again.

  Further, when the flow rate measurement value of urea water reaches a preset set value in S2-8, or when the nozzle switch 64 is turned on in S2-9, the supply of urea water is terminated. In S2-10, the replenishment pump 60 is stopped and the electromagnetic valve 62 is closed to stop the supply of urea water. This ends the current process.

  As described above, in the first embodiment, when the liquid type confirmation OK signal transmitted from the first weighing machine 12 that has performed the liquid type determination is received by the second weighing machine 14, the second liquid is supplied. Since the second weighing machine 14 does not need to be provided with a liquid type determination function, the configuration of the second weighing machine 14 can be simplified and the maintenance work can be reduced accordingly.

  In the second embodiment of the liquid supply apparatus 10, when the liquid type determination result of the first weighing machine 12 matches the liquid type, a liquid type confirmation OK signal is transmitted to the POS apparatus 46, and the POS apparatus 46 transmits the second weighing machine. 14 is configured to output a second liquid supply permission signal.

  FIG. 6 is a flowchart of the first liquid supply control process 2 executed by the control unit 26 of the first weighing machine 12. Since S3-1 to S3-5 shown in FIG. 6 are the same as the processes of S1-1 to S1-5 shown in FIG.

  In S3-6, a liquid type confirmation OK signal is transmitted to the POS device 46 on condition that the measured vapor concentration value matches the specified value. In S3-7, it is checked whether or not the first liquid supply permission signal is received from the POS device 46. When the POS device 46 receives the first liquid / liquid type confirmation OK signal from the first weighing machine 12, it outputs a first liquid supply permission signal to the first weighing machine 12.

  In S3-7, when the first liquid supply permission signal is received from the POS device 46, the process proceeds to S3-8. Note that the processing from S3-8 to S3-15 is the same as the processing from S1-8 to S1-15 shown in FIG.

  FIG. 7 is a flowchart of the second liquid supply control process 2 executed by the control unit 40 of the second weighing machine 14. Since S4-1 to S4-3 shown in FIG. 7 are the same as the processes of S2-1 to S2-3 shown in FIG. 5 described above, description thereof is omitted.

  In S4-3, when the liquid type determination canceling switch 42 is on, it is necessary to cancel the liquid type determination and replenish urea water for some reason, so that the process proceeds to S4-4 and goes to the POS device 46. Notify that the liquid type determination is unnecessary.

  In the next S4-5, it is checked whether or not a supply permission signal is received from the POS device 46. In S4-3, when the liquid type determination release switch 42 is OFF, the process of S4-4 is omitted and the process proceeds to S4-5.

  The processing of S4-6 to S4-10 is the same as the processing of S2-6 to S2-10 shown in FIG.

  FIG. 8 is a flowchart of control processing executed by the POS device 46. The POS device 46 stores various information (for example, permission transmission information, supply permission setting information, liquid type determination unnecessary information, liquid type confirmation signal information, etc.) stored in the previous control process in S5-1 shown in FIG. clear. In next S5-2, it is checked whether or not the supply permission setting to the first weighing machine 12 is completed. In S5-2, when the supply permission setting to the first weighing machine 12 is completed, the process proceeds to S5-3.

  In S5-3, a supply permission signal is transmitted to the first weighing machine 12, and the supply permission setting to the first weighing machine 12 is not completed. In S5-2, when the supply permission setting to the first weighing machine 12 is not completed, the process of S5-3 is omitted. Subsequently, in S5-4, it is checked whether or not the supply permission setting to the second weighing machine 14 is completed. In S5-4, when the supply permission setting to the second weighing machine 14 is completed, the process proceeds to S5-5. Further, in S5-4, when the supply permission setting to the second weighing machine 14 is not completed, the process proceeds to S5-8 described later.

  In the next S5-5, it is checked whether or not a signal indicating that the liquid type determination is unnecessary is received from the second weighing machine 14. In S5-5, when a signal indicating that the liquid type determination is unnecessary is not received from the second weighing machine 14, the process proceeds to S5-6 and a liquid type confirmation OK signal is received from the first weighing machine 12. Check whether or not. In S5-5, if the supply permission setting to the first weighing machine 12 is not completed, the process of S5-6 is omitted.

  In S5-6, when the liquid type determination OK signal is received from the first weighing machine 12, the process proceeds to S5-7, where the second liquid supply permission signal is transmitted to the second weighing machine 14, and the second The supply permission setting to the weighing machine 14 is not completed. In S5-6, when the liquid type confirmation OK signal is not received from the first weighing machine 12, the process proceeds to S5-8 described later.

  In the next S5-8, it is checked whether or not the supply permission signal to the weighing machines 12 and 14 has been transmitted. In S5-8, when the supply permission signal to the weighing machines 12 and 14 has already been transmitted, the current process is terminated. However, when the supply permission signal to the weighing machines 12 and 14 is not transmitted in S5-8, the process returns to S5-2, and the processes after S5-2 are executed again.

  As described above, in the second embodiment, when the POS device 46 transmits the supply permission signal to the weighing machines 12 and 14 and receives the liquid type confirmation OK signal from the first weighing machine 12, the second weighing machine 14. Since the second liquid supply permission signal is output to the second weighing machine 14, it is not necessary to provide a liquid type determination function in the second weighing machine 14, so that the configuration of the second weighing machine 14 can be simplified correspondingly and maintenance can be performed. Time and effort can be reduced.

  In the above embodiment, the liquid type detection sensor 56 that detects the vapor concentration of the fuel tank is used to detect the liquid type of the liquid stored in the fuel tank. A method of detecting the liquid type stored in the fuel tank by attaching an IC tag storing information on the liquid type of the liquid to be stored in the fuel tank and reading the liquid type information with an IC tag reader Of course, it may be used.

  In the above embodiment, the liquid supply from the second supply system is permitted after the liquid supply from the first supply system is completed. However, the liquid supply is not necessarily permitted in the above order. do not have to. For example, when it is determined that the liquid type determined by the liquid type determination unit matches the liquid type of the first liquid, the liquid supply from the first and second supply systems is permitted together, thereby The liquid supply from the two supply systems may be performed before (or simultaneously with) the liquid from the first supply system.

  In the above embodiment, the case of selling light oil and urea water at the same time is given as an example. However, the present invention is not limited to this. For example, when different liquids are continuously supplied, for example, an additive mixed with gasoline is added together with gasoline. Of course, the present invention can be applied to the case of sales.

It is a block diagram which shows one Example of the liquid supply apparatus which becomes this invention. It is a block diagram which shows each apparatus of the 1st weighing machine. It is a block diagram which shows each apparatus of the 2nd weighing machine. It is a flowchart of the 1st liquid supply control process 1 which the control part 26 of the 1st weighing machine 12 performs. It is a flowchart of the 2nd liquid supply control process 1 which the control part 40 of the 2nd weighing machine 14 performs. It is a flowchart of the 1st liquid supply control process 2 which the control part 26 of the 1st weighing machine 12 performs. It is a flowchart of the 2nd liquid supply control process 2 which the control part 40 of the 2nd weighing machine 14 performs. 5 is a flowchart of control processing executed by the POS device 46.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid supply apparatus 12 1st measuring machine 14 2nd measuring machine 20 Oil supply nozzle 26,40 Control part 28,42 Liquid type determination release switch 34 Supply nozzle 46 POS device 54 Vapor suction pump 56 Liquid type detection sensor 50 Oil supply Pump 58, 64 Nozzle switch 60 Supply pump

Claims (2)

A liquid supply device that supplies light oil and urea water to each of a fuel tank for light oil and a urea tank for urea water mounted on a vehicle,
A light oil supply means for supplying light oil to the fuel tank ;
Urea water supply means for supplying urea water to the urea tank , subject to input of a supply permission signal ;
Light oil determination means for determining whether or not the liquid stored in the fuel tank is light oil ;
Wherein while allowing the supply of light oil from diesel fuel supply means, outputting the supply permission signal to the urea water supply means when the liquid type which is determined by the previous SL gas oil determination means determines that the gas oil Control means for permitting the supply of light oil and urea water ,
Liquid supply apparatus characterized in that it comprises a. A liquid type determination release switch that is operated when determination by the light oil determination means is unnecessary is provided,
The urea water supply means enables supply of urea water to the urea tank regardless of whether or not the supply permission signal is input when the liquid type determination release switch is operated. The liquid supply apparatus according to claim 1.

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