JP2007182241A - Liquid supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a dissimilar material mixing accident upon supplying a liquid to a tank. <P>SOLUTION: A liquid supply system 10 has a first liquid supply unit 20A supplying gas oil, and a second liquid supply unit 20B supplying ureal water. When the gas oil is supplied through a supply nozzle 32A of the first liquid supply unit 20A, the supply of the ureal water is started through a supply nozzle 32B of the second liquid supply unit 20B under the condition that the supply of the ureal water is started after the supply of the gas oil has been started. Since the supply of the ureal water is permitted under the condition that the supply of the gas oil has been started, such a dissimilar material mixing accident (contamination) as mistakenly supplying the ureal water to a gas oil tank can be prevented even without providing a liquid type sensor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid supply system, and more particularly, to a liquid supply system configured to prevent liquid from being accidentally supplied to an untargeted tank when two types of liquid are supplied.

  For example, a fuel supply device that supplies fuel such as gasoline to a fuel tank of a vehicle has a liquid type sensor for detecting whether the fuel remaining in the fuel tank is gasoline or not. If the liquid type based on the detection value is the same as the liquid type set in advance, supply to the fuel tank is permitted and supply to the fuel tank becomes possible (see, for example, Patent Document 1).

  In addition, when the determination result does not match the preset liquid type, the supply permission is not made, and the different oil type mixing accident (contamination) in the fuel tank is prevented.

  On the other hand, for example, a vehicle having a tank for storing a plurality of types of liquids has recently been increasing, such as a vehicle having a tank of urea water used for purifying exhaust gas in addition to a fuel tank for storing fuel. It is in. When a vehicle equipped with such two types of liquid tanks arrives at a filling station for refueling, the fuel tank mounted on the vehicle and the other tanks are each supplied with liquid to the tank. become.

At that time, since the vehicle is provided with two types of tanks, the staff at the gas station must be careful not to mistake the type of liquid supplied to each tank.
Japanese Patent Laid-Open No. 5-77898

  In the above-described prior art, in order to prevent an accident of mixing different liquid species caused by supplying a different liquid by mistake in the liquid to be supplied to the tank, a liquid type sensor is provided for each liquid supply device. If the liquid type based on the detection value of the seed sensor is the same as the liquid type to be supplied, the supply of the liquid may be permitted.

  However, in this case, since the liquid type sensor is provided in each of the liquid supply paths for supplying each liquid, there is a problem that the configuration is complicated, and a liquid type sensor is provided for each liquid supply device. There was a problem that it was expensive because it was necessary.

  In addition, in the case of a liquid in which it is difficult to determine the liquid type by the liquid type sensor, there is a problem that the type cannot be accurately determined.

  In view of the above circumstances, an object of the present invention is to provide a liquid supply system that solves the problem.

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

  The invention described in claim 1 is a liquid supply system having a first liquid supply system for supplying a first liquid and a second liquid supply system for supplying a second liquid. Supply system control means for enabling supply of the second liquid supply system when the first liquid is supplied by a system is provided.

  The invention according to claim 2 is a permission means for the supply system control means to transmit a supply permission signal to the second liquid supply system when the first liquid is supplied from the first liquid supply system, Control means for operating the second liquid supply system when the supply permission signal is transmitted by the permission means.

  According to a third aspect of the present invention, when operated when the first liquid is not supplied from the first liquid supply system, a supply permission signal for the second liquid is sent to the second liquid supply system. A supply prohibition canceling means for transmitting is provided.

  According to the present invention, the first liquid and the second liquid are associated with each other in order to enable the supply of the second liquid supply system when the first liquid is supplied by the first liquid supply system. For example, in the case of a vehicle that cannot supply the second liquid when the first liquid is not supplied and does not require the first liquid, the supply of the second liquid is prohibited. And it can prevent supplying the 2nd liquid accidentally.

  Further, according to the present invention, when operated when the first liquid is not supplied, the second liquid supply permission signal is transmitted to the second liquid supply system, so that only the second liquid is supplied. When the first liquid is desired to be supplied, the supply prohibition of the second liquid is canceled without making the supply of the first liquid a condition, and only the second liquid can be supplied.

  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 system according to the present invention. As shown in FIG. 1, the liquid supply system 10 includes a first liquid supply device 20A that supplies light oil (first liquid), and a second liquid supply device that supplies urea water (second liquid). 20B.

  The first liquid supply device 20A has a plurality of liquid supply systems so as to be able to supply oil liquids other than light oil (for example, gasoline). Here, for convenience of explanation, only the liquid supply system for light oil will be described. To do.

  In the first liquid supply device 20A, a pump 24A, a flow meter 26A, and an electromagnetic valve 28A are arranged in a liquid supply conduit 22A that is inserted into an underground tank (not shown) in which light oil is stored. A liquid supply hose 30A and a supply nozzle 32A are connected to the downstream side of the liquid supply pipe line 22A. The pump 24A, the flow meter 26A, and the electromagnetic valve 28A are connected to the control unit 34A via a signal line (indicated by a broken line in FIG. 1) so as to be controlled by the control unit 34A.

  In addition, a flow rate indicator 36A, a nozzle hooking switch 38A, and a memory 39 are connected to the control unit 34A. The liquid supply line 22A, the pump 24A, the flow meter 26A, the electromagnetic valve 28A, the liquid supply hose 30A, and the supply nozzle 32A constitute a first liquid supply system.

  Furthermore, the control unit 34A is communicably connected to the control unit 34B of the second liquid supply apparatus 20B via the communication line 40. The second liquid supply device 20B has substantially the same configuration as that of the first liquid supply device 20A, and includes a liquid supply conduit 22B, a pump 24B, a flow meter 26B, and a solenoid valve that constitute the second liquid supply system. 28B, liquid supply hose 30B, and supply nozzle 32B.

  The second liquid supply device 20B is provided with a release switch 50 that is operated when supplying only urea water. Even when the light oil is not supplied, the release switch 50 can release the supply prohibition condition of the second liquid supply device 20B by turning on the staff of the filling station.

  FIG. 2 is a side view of an automobile equipped with a light oil tank and a urea water tank. As shown in FIG. 2, the automobile 41 is equipped with an engine (not shown) that uses light oil as fuel, and a light oil tank 42 and a urea water tank 44 are juxtaposed on the side of the vehicle body. . Although the urea water tank 44 is smaller than the capacity of the light oil tank 42, the consumption amount is smaller than that of the light oil, so that the number of times of supply is smaller than that of the light oil.

  In this embodiment, the light oil is supplied by removing the cap 42b from the supply port 42a of the light oil tank 42, inserting the supply nozzle 32A into the supply port 42a, and operating a nozzle lever (not shown) in the valve opening direction. Be started. Subsequently, when supplying light oil, the cap 44b is removed from the supply port 44a of the urea water tank 44, the supply nozzle 32B is inserted into the supply port 44a, and the nozzle lever (not shown) is opened in the valve opening direction. The urea water supply is started by the operation. At that time, the supply of urea water is required under the condition that light oil is being supplied.

  Here, the control process executed by the control unit 34A of the first liquid supply apparatus 20A will be described with reference to the flowchart of FIG. As shown in FIG. 3, when the power switch is turned on in S11, the control unit 34A proceeds to S12 and sets the first liquid type signal (status signal) to the HIGH level (indicating standby). . As a result, the memory 39 stores that the first liquid type signal is set to the HIGH level. The clerk removes the supply nozzle 32A from the nozzle hook 46A, inserts it into the supply port 42a of the light oil tank 42, and operates the nozzle lever in the valve opening direction.

  In S13, when the supply nozzle 32A is removed from the nozzle hook 46A and the nozzle hook switch 38A of the nozzle hook 46A is turned off, the process proceeds to S14, and the first liquid type signal (status signal) is set to the LOW level (indicating that the liquid is being supplied). Set to. As a result, the memory 39 stores that the first liquid type signal is set to the LOW level.

  In the next S15, the liquid supply amount displayed on the flow rate indicator 36A is reset to zero. In S16, the pump 24A is activated and the electromagnetic valve 28A is opened. Thereby, the light oil pumped up from the underground tank by the pump 24A is supplied to the light oil tank.

  Subsequently, in S17, the integrated flow rate value obtained by integrating the flow rate pulses output from the flow meter 26A is stored in a flow rate storage area (not shown) of the memory 39. In S18, the numerical value displayed on the flow rate indicator 36A is updated to display the current light oil supply amount.

  In the next S19, it is checked whether the nozzle hooking switch 38A of the nozzle hooking 46A is on. In S19, when the nozzle hooking switch 38A is off, the supply nozzle 32A is removed from the nozzle hooking 46A. Therefore, it is determined that the liquid is being supplied, the process returns to S16, and the processes of S16 to S18 are repeated.

  When the supply to the light oil tank 42 is completed, the clerk operates the nozzle lever in the valve closing direction to remove the supply nozzle 32A from the supply port 42a of the light oil tank 42 and return it to the nozzle hook 46A. Then, a cap 42 b is attached to the supply port 42 a of the light oil tank 42. In S19, when the nozzle hooking switch 38A is on, the supply nozzle 32A is returned to the nozzle hooking 46A. Therefore, it is determined that the liquid supply is finished, and the process proceeds to S20, and the first liquid type signal is set to the HIGH level. Set to (Indicates waiting). Thereby, it is stored that the first liquid type signal (status signal) stored in the memory 39 has been updated to the HIGH level. Thereafter, in S21, the pump 24A is stopped and the electromagnetic valve 28A is closed. This completes the current light oil supply process.

  Thereafter, the control unit 34A repeats the processes of S13 to S21. In addition, when the power switch (not shown) is turned off, the control unit 34A ends the control process.

  Here, communication control performed between the control unit 34A and the control unit 34B via the communication line 40 will be described with reference to FIG. FIG. 4 is a timing chart showing transmission and reception of signals between the control unit 34A and the control unit 34B in time series, and the time axis in FIG.

  When the nozzle hooking switch 38B is turned off, the control unit 34B of the second liquid supply device 20B transmits a state request signal to the control unit 34A of the first liquid supply device 20A. When the state request signal (1B) is transmitted from the transmission control unit 34B to the control unit 34A, the control unit 34A is on standby (the first liquid type signal is at the high level), so the control unit 34A A waiting signal (1A) is transmitted to the controller 34B.

  Further, when the state request signal (2B) is transmitted from the control unit 34B to the control unit 34A, the control unit 34A is in control because the control unit 34A is supplying (the first liquid type signal is LOW level). The supplying signal (2A) is transmitted to the unit 34B. Therefore, the control unit 34B can supply urea water.

  Further, when the state request signal (3B) is transmitted from the control unit 34B to the control unit 34A, the control unit 34A is in a standby state after the supply of the control unit 34A is completed (the first liquid type signal is at the high level). The unit 34A transmits a waiting signal (3A) to the control unit 34B.

  Next, the control process 1 executed by the control unit 34B of the second liquid supply apparatus 20B will be described with reference to the flowchart of FIG. As shown in FIG. 5, when the power switch is turned on in S31, the control unit 34B proceeds to S32 and checks whether or not the nozzle hooking switch 38A of the nozzle hooking 46A is off. After the supply of the light oil is completed, the clerk removes the supply nozzle 32B from the nozzle hook 46B, inserts it into the supply port 44a of the urea water tank 44, and operates the nozzle lever in the valve opening direction.

  In S33, a state request signal is transmitted to the control unit 34A. In the next S34, it is checked whether or not a status signal from the control unit 34A has been received. In S34, when the status signal from the control unit 34A is received, the process proceeds to S35, and it is checked whether or not the received first liquid type signal (status signal) is at the LOW level (indicating that light oil is being supplied). In S35, when the first liquid type signal (status signal) transmitted from the control unit 34A is at the LOW level (indicating that light oil is being supplied), the process proceeds to S36 and the liquid supply displayed on the flow rate indicator 36B. Reset the amount to zero. In S37, the pump 24B is activated and the electromagnetic valve 28B is opened. Thus, the urea water pumped up by the pump 24B is supplied to the urea water tank 44.

  Subsequently, in S38, the flow rate pulses output from the flow meter 26B are integrated. In S39, the numerical value displayed on the flow rate indicator 36B is updated to display the current urea water supply amount.

  In next S40, it is checked whether or not the nozzle hooking switch 38B of the nozzle hooking 46B is ON. In S40, when the nozzle hooking switch 38B is OFF, the supply nozzle 32B is removed from the nozzle hooking 46B. Therefore, it is determined that the liquid is being supplied, the process returns to S38, and the processes of S38 to S40 are repeated.

  When the supply to the urea water tank 44 is completed, the clerk operates the nozzle lever in the valve closing direction to remove the supply nozzle 32B from the supply port 44a of the urea water tank 44 and return it to the nozzle hook 46B. Then, a cap 44 b is attached to the supply port 44 a of the urea water tank 44. In S40, when the nozzle hooking switch 38B is on, the supply nozzle 32B has been returned to the nozzle hooking 46B. Therefore, it is determined that the urea water supply has ended, and the process proceeds to S41 to stop the pump 24B. Then, the electromagnetic valve 28B is closed. This completes the current urea water supply process.

  In S35, when the received first liquid type signal (status signal) is HIGH (standby), the supply of light oil has not started yet, so the process proceeds to S42 and the operation procedure is incorrect. Is notified by an alarm or the like. Subsequently, in S43, it is checked whether the nozzle hooking switch 38B of the nozzle hooking 46B is on. In S43, when the nozzle hooking switch 38B is ON, the supply nozzle 32B is returned to the nozzle hooking 46B, so the process proceeds to S44, the operation procedure alarm is stopped, and the notification that the operation procedure is incorrect is cancelled. Thereafter, the process returns to S32 again.

  In this way, the urea water supply is permitted on condition that the light oil is supplied, so that it is possible to prevent a heterogeneous mixing accident (contamination) that erroneously supplies the urea water to the light oil tank without providing a liquid type sensor. It becomes possible.

  In the above embodiment, the liquid supply device 2 transmits a state request signal to the liquid supply device 1 via the communication line 40, and the liquid supply device 1 receives the state request signal and receives the state of the liquid supply device 1. By transmitting a status signal indicating whether or not refueling is being performed to the liquid supply apparatus 2 via the communication line 40, it is possible to determine whether or not the liquid supply apparatus 1 is refueling in the liquid supply apparatus 2. However, there are many configurations in the liquid supply device 2 that determine whether or not the liquid supply device 1 is refueling.

  For example, the liquid supply device 1 is configured to always transmit a state signal indicating whether or not refueling is being performed to the liquid supply device 2, and in the liquid supply device 2, the liquid supply device 1 is refueling from this state signal. In this case, the liquid supply apparatus 2 can determine whether or not the liquid supply apparatus 1 is refueling without inquiring of the liquid supply apparatus 1.

  In the above embodiment, liquid supply using the liquid supply device 2 is enabled only when the liquid supply device 1 is refueling. However, the liquid supply device 2 is refueling when the liquid supply device 1 is refueling. For example, the liquid supply device 2 may supply the liquid until a predetermined time elapses after the liquid supply device 1 ends.

  In the case of changing the control in this way, in the flowchart of the control process of the liquid supply apparatus 1 in FIG. 3, between S19 and S20, after determining that the nozzle hooking switch 38A of the nozzle hooking 46A is on in S19. It may be determined whether or not a predetermined time has elapsed, and when the predetermined time has elapsed, the process proceeds to S20 and the first liquid type signal is set to the HIGH level. If the control process is changed in this way, the liquid can be supplied from the liquid supply device 2 within a predetermined time even after the supply nozzle 32A is returned to the nozzle hook 46A.

  Next, a modified example (control process 2) of the control process executed by the control unit 34B of the second liquid supply apparatus 20B will be described with reference to the flowchart of FIG. In FIG. 6, the processes of S51 to S61 are the same as S31 to S41 of the control process 1 of the above-described embodiment, and thus the description thereof is omitted.

  As shown in FIG. 6, when the first liquid type signal (status signal) transmitted from the control unit 34A is the LOW level (representing that light oil is being supplied) in S55, the control unit 34B proceeds to S62. Proceed and notify the operator that the operation procedure is incorrect by an alarm or the like. Subsequently, in S63, it is checked whether or not the release switch 50 is turned on. In S63, when the release switch 50 is turned on, the process proceeds to S56, and the processes of S56 to S61 are performed to supply urea water.

  If the release switch 50 is not turned on in S63, the process proceeds to S65 to check whether the nozzle hooking switch 38B of the nozzle hooking 46B is on. In S65, when the nozzle hooking switch 38B is on, the supply nozzle 32B is returned to the nozzle hooking 46B, so the process proceeds to S66, the operation procedure alarm is stopped, and the notification that the operation procedure is incorrect is cancelled. Thereafter, the process returns to S52 again.

  In this way, by operating the release switch 50 to turn on, the light oil supply condition is released, and urea water can be supplied without supplying light oil. For example, when the user remembers to supply urea water after supplying light oil, the urea water can be supplied by operating the release switch 50, and convenience can be improved.

  In the above embodiment, the case of supplying light oil and urea water is given as an example. However, the present invention is not limited to this. For example, a combination of gasoline (first liquid) and an additive thereto (second liquid), etc. Of course, the present invention can also be applied to a case where a plurality of other liquids are supplied.

  Moreover, although the case where different liquids are supplied to each of the two types of tanks mounted on the automobile has been described in the above embodiment, the present invention can also be applied to liquid supply to tanks provided in things other than automobiles. Needless to say.

It is a block diagram which shows one Example of the liquid supply system by this invention. It is a side view of the motor vehicle equipped with the tank for light oil and the tank for urea water. It is a flowchart for demonstrating the control processing which 34A of 1st liquid supply apparatuses 20A perform. It is a timing chart which shows transmission and reception of the signal between control part 34A and control part 34B in time series. It is a flowchart for demonstrating the control processing 1 which the control part 34B of the 2nd liquid supply apparatus 20B performs. It is a flowchart for demonstrating the control processing 2 which the control part 34B of the 2nd liquid supply apparatus 20B performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid supply system 20A 1st liquid supply apparatus 20B 2nd liquid supply apparatus 24A, 24B Pump 26A, 26B Flowmeter 28A, 28B Electromagnetic valve 32A, 32B Supply nozzle 34A, 34B Control part 38A, 38B Nozzle hanging switch 40 Communication Line 42 Light oil tank 44 Urea water tank 50 Release switch

Claims (3)

In a liquid supply system having a first liquid supply system for supplying a first liquid and a second liquid supply system for supplying a second liquid,
A liquid supply system comprising supply system control means for enabling supply of the second liquid supply system when the first liquid is supplied by the first liquid supply system. The supply system control means includes
Permission means for transmitting a supply permission signal to the second liquid supply system when the first liquid is supplied from the first liquid supply system;
Control means for operating the second liquid supply system when the supply permission signal is transmitted by the permission means;
The liquid supply system according to claim 1, comprising:   Supply prohibition canceling means for transmitting a supply permission signal for the second liquid to the second liquid supply system when operated when the first liquid is not supplied from the first liquid supply system. The liquid supply system according to claim 1.

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