JPH10103596A - Gas feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make gas charging processing executable on the basis of a common system parameter set by system parameter setting means even in case of being unable to read a rapid charging system parameter due to the generation of abnormality to storage means stored with the rapid charging system parameter. SOLUTION: A control device 34 of a gas feeder 1 computes charging flow and charging pressure on the basis of a rapid charging system parameter stored in an SRAM 45 and controls a compressor 12, switching valves 14, 17, a gas feed switching valve 19 and a control valve 21. At the time of judging that the rapid charging system parameter is not stored normally in the SRAM 45, the control device 34 computes pressure or flow to be charged in a fuel tank on the basis of a common system parameter set by an ROM 44, so that gas charging processing can be executed on the basis of the common system parmeter set by the ROM 44 even in case of abnormality being generated to the SRAM 45 stored with the rapid charging system parameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply device, and more particularly to a gas supply device configured to fill a tank to be filled with compressed gas.

[0002]

2. Description of the Related Art Compressed natural gas (CN) obtained by compressing natural gas
Along with the development of a vehicle (CNG vehicle) that runs on G) as a fuel, a gas supply device that supplies compressed natural gas to a fuel tank of the vehicle has been put into practical use. This type of gas supply device is configured such that compressed gas is stored in a gas pressure accumulator and the gas stored in the gas pressure accumulator is filled in a fuel tank of a CNG vehicle.

In this type of gas supply device, the gas filling pressure, gas filling time, and the like are determined to be arbitrary values in accordance with the specifications of the customer, and the operation time and operation timing of each device are set so as to satisfy these performances. Therefore, the parameters of the control system are individually set for each device. In addition, the system installed at each filling station stores system parameters for high-speed filling as respective system parameters in a memory so that high-speed filling can be performed. For example, a change in the number of gas-filled gas accumulators would require changing the parameters of the control system.

[0004] Since the specifications of each device are different for each filling station,
Numerical values of the high-speed filling system parameters set corresponding to each device are different for each filling station, and each filling station-specific high-speed filling system parameter is set.

[0005]

In a conventional gas supply apparatus, for example, when a dispenser unit is installed in a filling station, each high-speed filling system parameter is inputted and stored in a memory. If the high-speed filling system parameter is destroyed from the memory and cannot be read, the pressure or flow rate for filling the tank to be filled cannot be calculated, and the gas filling process cannot be executed.

Further, when the high-speed filling system parameters are erased from the memory, it is necessary to reset the parameters such as the maximum value and the minimum value of the flow rate required for the gas filling control and the density coefficient. In this case, since the parameter setting work must be performed for each dispenser in which the dispenser unit is installed, there is a problem that it takes too much time to delay the restart of gas filling.

Therefore, an object of the present invention is to provide a gas supply device that solves the above-mentioned problems.

[0008]

In order to solve the above problems, the present invention has the following features. The present invention has a storage means for storing a high-speed filling system parameter which is a coefficient for compensating a high-speed filling condition for each filling station, and uses the high-speed filling system parameter to fill the tank to be filled with pressure. Alternatively, in a gas supply device that calculates a flow rate and performs high-speed filling of the tank to be filled, a system parameter setting unit that sets a common system parameter that can be used at any filling station, and a high-speed filling unit stored in the storage unit. A storage state determination unit for determining a storage state of a system parameter, and when the storage state determination unit determines that the high-speed filling system parameter is not normally stored in the storage unit, the system parameter setting unit Calculate the pressure or flow rate for filling the tank to be filled based on the set common system parameters Calculation means that is intended to characterized in that it comprises a.

Therefore, according to the present invention, when it is determined that the high-speed filling system parameters are not normally stored in the storage means, the tank to be filled is determined based on the common system parameters set by the system parameter setting means. In order to calculate the pressure or flow rate for filling the system, even if an abnormality occurs in the storage unit storing the system parameter for high-speed filling and the system parameter for high-speed filling cannot be read, the common system set by the system parameter setting unit is used. The gas filling process can be executed according to the parameters.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of the gas supply device according to the present invention. The gas supply device 1 is installed, for example, at a gas supply station that supplies compressed natural gas (CNG) obtained by compressing city gas to a predetermined pressure to a fuel tank (filled tank) 3 of an automobile 2.

The gas supply device 1 generally includes a pressure generation unit 4 for compressing city gas to a predetermined pressure to generate a pressurized gas, and a gas supply unit 4 for supplying the gas compressed by the pressure generation unit 4 to the fuel tank 3. Of the dispenser unit 5. The pressure generating unit 4 includes a multi-stage compressor 12 disposed in a branch line 11 branched from a medium-pressure line (not shown) of city gas. Further, a compressor opening / closing valve 14 that opens and closes the pipeline 13 to supply or shut off the gas discharged from the compressor 12 is provided in the pipeline 13 drawn from the discharge port of the compressor 12.

An end of a pipe 15 connected to the pipe 13 is connected to a gas accumulator 16. The gas accumulator 16 is generally called a “gas accumulator” in literatures and the like. In addition, a gas accumulator opening / closing valve 17 that opens and closes the pipe 15 to supply or shut off the gas accumulated in the gas accumulator 16 is provided in the pipe 15. In addition, pipeline 1
A gas supply pipe 18 extending to the dispenser unit 5 is connected to a connection portion between the pipe 3 and the pipe 15.

The compressor 12 includes on-off valves 14, 17
Is opened and the valve in the dispenser unit 5 is driven in a closed state, the high-pressure gas compressed by the compressor 12 is supplied to the gas accumulator 16. still,
In this embodiment, the compressor 12 has two gas accumulators 16.
Supply compressed gas until the pressure rises to 50 kgf / cm ² . When the pressure of the gas accumulator 16 reaches 250 kgf / cm ² , the compressor 12 stops, and the on-off valve 14,
The valve 17 is closed, and the pressure generating unit 4 enters a standby state in which a filling operation can be performed.

The pressure generating unit 4 and the dispenser unit 5 are connected via a gas supply pipe 18. The gas supply line 18 extending into the dispenser unit 5 includes, in order from the upstream side, a gas supply opening / closing valve 19 formed of an electromagnetic valve and communicating or blocking the gas supply line 18, and a gas supply line 18. A mass flow meter 20 for measuring a supply amount of flowing gas, a control valve 21 for controlling a gas supplied to a downstream side (filling side), and a pressure transmission for detecting a secondary pressure controlled by the control valve 21 A vessel 22 is provided.

A gas-filled hose 23 is connected to a downstream end of the gas supply pipe 18.
A manual three-way valve 24 is connected to the downstream end of the valve. The three-way valve 24 has an inlet port a to which the gas filling hose 23 is connected, and an exhaust port b to which the exhaust pipe 25 is connected.
And a filling port c to which the connection coupler 26 is connected. The three-way valve 24 is operated in a state where the inflow port a and the filling port c communicate with each other at the time of gas filling, and the exhaust port b and the filling port c communicate with each other when performing the depressurizing operation after the gas filling is completed. And the pressure in the connection coupler 26 is reduced.

On the side surface of the dispenser unit 5, a coupler hooking portion 29 for hooking the connection coupler 26 is attached. The coupler hooking portion 29 detects the presence or absence of the connection coupler 26 by a coupler hooking switch. 30 are provided. Further, the dispenser unit 5 is provided with a filling start button 31, a filling stop button 32, and an emergency stop button 33.

The filling start button 31 is connected to the connection couplers 26 and 36.
Is a switch button operated to open the gas supply opening / closing valve 19 after being connected. The filling stop button 32 is a switch button operated to close the gas supply opening / closing valve 19 and the control valve 21. The emergency stop button 33 is a switch button operated to urgently close all valves.

The control device 34 includes a compressor 12, on-off valves 14, 17, a gas supply on-off valve 19, a mass flow meter 20,
Control valve 21, pressure transmitter 22, coupler switch 3
0, filling start button 31, filling stop button 32, emergency stop button 33
And other devices. The mass flow meter 20 includes:
Vibrates a pipe called a sensor tube and measures the flow rate using the fact that the phase difference between the inflow side and the outflow side of the pipe is proportional to the flow rate due to the Coriolis force corresponding to the gas flow rate flowing in the vibrating pipe. Is a Coriolis-type mass flow meter that performs the following.

Therefore, the mass flow meter 20 can accurately measure the mass flow rate of the gas compressed to a high pressure, and can measure the flow rate per unit time (or the number of flow pulses per unit time) during the gas filling operation. ) Is output to the control device 34.
Further, the control valve 21 controls the gas supply amount (the flow rate is determined by pressure × time) supplied to the fuel tank 3 by controlling the filling pressure in accordance with a command from the control device 34, and at the time of starting filling and ending the filling. At times, the pressure is controlled so that the filling pressure changes gradually (increase or decrease), thereby preventing each device from being damaged by a sudden change in pressure.

The gas supply opening / closing valve 19 functions as a main valve of the pressure generating unit 4 and automatically opens or closes according to a command from the control device 34. The gas supply on-off valve 19 may be a manual on-off valve instead of the solenoid valve. The three-way valve 24 is configured to be switched by a manual operation. Before and after gas filling, the filling port b and the exhaust port c are communicated, and the inflow port a is shut off. Further, at the time of gas filling, switching operation is performed so that the inflow port a and the filling port b communicate with each other and the exhaust port c is shut off.

Reference numeral 35 denotes a display device for displaying a gas filling amount and a filling pressure filled in the fuel tank 3. Further, in the vehicle 2, the connection coupler 36 on the filling side to which the connection coupler 26 of the dispenser unit 5 is connected, and the connection coupler 36.
The fuel tank 3 includes a pipe 37 that communicates with the fuel tank 3, a manual opening / closing valve 38 disposed in the pipe 37, and a check valve 39 that prevents the gas filled in the fuel tank 3 from flowing back.

Various data are stored in an SRAM (storage means) 45 of the control device 34, and various system parameters such as those shown in FIGS.
Further, system parameters for high-speed filling, which are coefficients for compensating for high-speed filling conditions for each filling station, are stored as standard values. In FIG. 2B, the items marked with a circle are system parameters for high-speed filling, and the other items are parameters generally used in each filling station. Also,
The common system parameter is set so that the filling speed becomes low but the filling can be performed instead of the high-speed filling system parameter. When the high-speed filling system parameter cannot be read from the SRAM 45, the common system parameter is used. The operation is performed.

The ROM 44 of the control device 34
A gas supply program for calculating the pressure or flow rate for filling the tank to be filled using the system parameters for high-speed filling and performing high-speed filling to the tank to be filled is stored. Also,
The ROM 44 stores check data (check sum) for checking whether or not each system parameter read from the SRAM 45 and the system parameter for high-speed filling are correct numerical values. It stores system parameters (see FIGS. 2A and 2B) and also functions as system parameter setting means.

Further, in the ROM 44, a storage state determination program (storage state determination means) for determining the storage state of the high-speed filling system parameters stored in the SRAM 45.
When it is determined that the high-speed filling system parameters are not normally stored, the pressure or the pressure for filling the tank to be filled based on the common system parameters without using the high-speed filling system parameters stored in the ROM 44. A calculation program (calculation means) for calculating the flow rate is stored.

Accordingly, the control device 34 determines the storage state of the high-speed filling system parameters stored in the SRAM 45 based on the above-mentioned programs, and performs the filling operation based on the signals output from the mass flow meter 20 and the pressure transmitter 22. The flow rate and charging pressure are calculated, and the compressor 12, the on-off valves 14, 17, the gas supply on-off valve 19, the mass flow meter 2
0, operation control of the control valve 21 is executed.

FIG. 3 shows a display example displayed on the screen of the display device 35 during gas filling. On the screen of the display device 35,
A filling amount (integrated flow rate) display section 35a is provided in the upper part, a flow rate (instantaneous flow rate) display part 35b and an operation mode display part 35c are provided in the middle part, and a filling pressure display part 35d is provided in the lower part. Filling pressure display section 35d of display device 35
Are pressure values 0 to 19. measured by the pressure transmitter 22.
6 MPa is displayed as a bar graph according to the number of lighting segments.

Here, a gas filling operation in the gas supply device 1 having the above configuration will be described. When filling the fuel tank 3 of the vehicle 2 with gas, the operator first removes the connecting coupler 26 from the coupler engaging portion 29 of the dispenser unit 5 and connects the connecting coupler 26 to the connecting coupler 36 of the vehicle 2. Then, the operator opens the manual opening / closing valve 38 of the automobile 2 and performs a switching operation so that the inflow port a and the filling port c of the three-way valve 24 communicate with each other.

Next, when the operator turns on the filling start button 31, the control device 34 opens the on-off valve 17 and also opens the gas supply on-off valve 19. This allows
The high-pressure gas accumulated in the gas accumulator 16 is supplied to a gas supply line 18, a gas supply opening / closing valve 19, a mass flow meter 20, and a control valve 2.
1, pressure transmitter 22, gas filling hose 23, three-way valve 2
4. The fuel tank 3 is filled via the connection couplers 26, 36 and the pipe 37.

Immediately after the start of filling, the valve opening of the control valve 21 is slightly reduced in order to calculate the container capacity of the fuel tank 3, and the supply amount to the fuel tank 3 is suppressed to 3 kg / min. When the capacity of the fuel tank 3 is determined, a control law (constant pressure control or constant flow rate control) according to the capacity is obtained.
To start filling the fuel tank 3 with gas.

When the fuel tank 3 is thus filled with gas and becomes full, the pressure of the fuel tank 3 becomes approximately 200 kgf / cm ² . The gas filling amount that has passed through the gas supply line 18 is measured by the mass flow meter 20, and a voltage value (a phase difference between the inflow side and the outflow side) according to the gas filling amount is used as a flow measurement signal by the controller 34. Is output to The control device 34 integrates the supply pressure detected by the pressure transmitter 22 and the flow measurement value from the mass flow meter 20, and displays the amount of gas filling the fuel tank 3 on the display device 35.

When the filling of the gas into the fuel tank 3 is completed, the operator switches the three-way valve 24 so that the exhaust port b and the filling port c are communicated and the inflow port a is shut off. Three-way valve 24 and check valve 39
Is exhausted from the port c to the exhaust pipe 25, and the pressure in the connection couplers 26, 36 is reduced to atmospheric pressure. As a result, the operator can connect the connection coupler 2 with a light force.
6, 36 can be separated.

Thereafter, the operator closes the manual opening / closing valve 38 on the vehicle 2 side, and then disconnects the connection coupler 26 of the dispenser unit 5 from the connection coupler 36 of the vehicle 2,
It is hooked on the coupler hooking section 29. And filling stop button 3
When 2 is turned on, a series of gas filling operations is completed.

Hereinafter, the processing executed by the control unit 34 will be described with reference to FIGS. In the present embodiment, the control processing of the control device 34 will be described separately for idler processing, sampling processing, and system initialization. In the idler processing, the operation mode such as the start of filling and parameter setting is changed. The sampling process is periodically started by a timer interrupt every 0.01 seconds, and performs gas filling control and display control of the display device 35. Therefore, the control device 34 has an idler unit for performing an idler process and a sampler unit for performing a sampling process.

FIG. 4 is a PAD for idler processing. FIG.
In step S0 (hereinafter, "step" is omitted) is a permanent loop, and the control device 28 executes the following processing until the power is turned off. In S1, it is determined whether a predetermined time (for example, 10 seconds) has elapsed since the filling start switch button 31, the filling stop switch button 32, and the emergency stop switch button 33 were simultaneously turned on. When a predetermined time (for example, 10 seconds) has elapsed in S1, the process proceeds to S2. However, in S1, if the predetermined time (for example, 10 seconds) has not elapsed, S
Proceed to 3.

In S2, the routine jumps to the function of the setting mode 0 to change the basic parameters of the system. In S3,
It is determined whether the filling start switch button 31 and the coupler switch 30 are pressed on and the filling stop switch button 32 is kept off for a predetermined time (for example, 10 seconds). Then, if a predetermined time (for example, 10 seconds) has elapsed in S3, the process proceeds to S4. However, if the predetermined time (for example, 10 seconds) has not elapsed in S3, the process proceeds to S5.

In S4, the process jumps to the function of the setting mode 1 and the system is manually operated. In S5, it is determined whether or not the filling stop switch button 32 and the coupler switch 30 are pressed on and the filling start switch button 31 is kept off for a predetermined time (for example, 10 seconds). Then, if a predetermined time (for example, 10 seconds) has elapsed in S5, the process proceeds to S6. However, if the predetermined time (for example, 10 seconds) has not elapsed in S5, the process proceeds to S7.

At S6, the process jumps to the function of the setting mode 2 to change the detailed parameters of the system. In S7, the coupler start switch 30 is turned off and the filling start switch button 31
Is determined to be turned on. Then, in S7, when the coupler switch 27 is off and the filling start switch button 31 is on, the process proceeds to S8, and gas filling is started. However, if this condition is not satisfied in S7, the process proceeds to S12.

In S8, it is determined whether a coupler switch flag exists. The coupler switch flag indicates the presence or absence of the coupler switch 30 itself, and can be changed in a setting mode 2 described later. And
In S8, if the coupler switch flag is present, S
Go to 10. However, if there is no coupler switch flag in S8, the process proceeds to S9.

In S9, when the coupler switch flag is not set, the integrated flow rate of the display device 35 is cleared to prepare for the next filling. In this case, since there is no coupler hooking switch 30 itself, the integrated flow rate is reset at the start of filling. In the next step S10, the fact that the filling flag has been turned on and gas filling has started is notified to the sampling section. Then, S
Proceed to 11 and wait until the filling flag is turned off. When the gas filling is completed and the sampler unit turns off the filling flag, the process proceeds to S12.

In S12, it is determined whether or not the coupler switch 30 has been released. This is because the condition of only the system having the coupler switch 30 can be satisfied. When this condition is satisfied, the process proceeds to S13.
If this condition is not satisfied, the process returns to S0.

When the coupler 26 is removed from the coupler hook 29 in S13, the integrated flow rate of the display device 35 is cleared to prepare for the next filling. And S0
Return to the loop. FIG. 5 is a PAD for explaining the processing of the sampler unit.

In FIG. 5, the state of each switch is read into the data area in S14. Switch reading is S14
The value read here is used to check the state of the switch in another task such as an idler unit.
Next, the process proceeds to S15, where the instantaneous flow rate value of the flow meter 21 and the analog value of the pressure transmitter 22 are A / D converted and read into the data area.

Then, the program proceeds to S16, in which a change in the filling flag is monitored. Then, in S16, when the filling flag at the time of executing the previous sampler is OFF and the filling flag at the time of executing the current sampler is ON, it is determined that the filling has just started, and the process proceeds to S17. However, in S16, if the filling flag at the time of executing the previous sampler is ON or the filling flag at the time of executing the current sampler is OFF, the process proceeds to S20.

In S17, the gas supply on-off valve 19 is opened,
In S18, the on-off valve 17 of the gas accumulator 16 at which charging is started is opened, and in S19, the on-off valve 17 of the gas accumulator 16 not filled is closed. At this time, in the system of FIG. 1, there is no gas accumulator that is not filled, so that S19 is not closed.

In S20, it is determined whether or not the filling flag is on. Then, if the filling flag is ON in S20, the process proceeds to S21. However, if the filling flag is off in S20, the process proceeds to S32. In S21, it is determined whether or not a condition for completing the filling is satisfied. The conditions for the end of filling are as follows: when the pressure on the filling side reaches the full tank pressure, when the filling stop switch button 32 is turned on, when the pressure on the primary side decreases and the specified flow rate cannot be filled. There are three conditions. Then, in S21, if the termination condition is satisfied, the process proceeds to S22. But,
If the termination condition is not satisfied in S21, S27
Proceed to.

In S22, the filling flag is turned off. This indicates to the idler that filling has been completed at the end of sampling. In S23, the gas supply on / off valve 19 installed in the apparatus is closed, and the process proceeds to S24. S24
Then, the control valve 21 is closed and the process proceeds to S25. In S25,
By monitoring the compressor flag, it is determined whether the compressor 12 is running. Since the natural gas compressed by the compressor 12 passes through the on-off valves 14 and 17 and is stored in the gas accumulator 16, the on-off valves 14 and 17 must be opened while the compressor 12 is running. When the compressor 12 is running, the process proceeds to S32. However, when the compressor 12 has not been started, the process proceeds to S26.

In S26, if the compressor 12 has not been started, the on-off valve 17 is closed. Thereafter, the process proceeds to S32. In S27, it is determined whether or not the gas accumulator switching condition is satisfied. If the switching condition is satisfied in S27, the process proceeds to S28. However, if the switching condition is not satisfied in S27, the process proceeds to S31.

In S28, it is determined whether there is a gas accumulator to be switched. In the case of the configuration shown in FIG. 1, since there is only one gas accumulator 16, the gas accumulator switching is not performed. However, this control flow can cope with a configuration in which a plurality of gas accumulators 16 are connected in parallel. It has become.

If there are a plurality of gas accumulators 16 to be switched in S28, S29 is executed. However, in S28, the plurality of gas accumulators 16 to be switched
If there is no, S30 is executed. In S29, after the on-off valve 17 of the gas pressure accumulator 16 currently being charged is closed, the on-off valve 17 of the gas pressure accumulator 16 to be charged is opened to switch the gas pressure accumulator. Thereafter, the process proceeds to S32.

In S30, a function for performing the filling control is called. In the present embodiment, the details of the filling control will not be described, but gas filling is performed using a known control method. Next, the process proceeds to S32. In the next S31, a function for performing the filling control is called as in S30. Next, the process proceeds to S32. From S32 to S35, the compressor 12 is controlled.

In S32, it is determined whether or not the pressure of the gas accumulator 16 is lower than 23 MPa. Since the gas accumulator 16 has a built-in pressure switch, the pressure of the gas accumulator 16 can be determined by monitoring a signal from the pressure switch. In S32, when there is the gas accumulator 13 of 23 MPa or less, the process proceeds to S33. But,
In S32, if there is no gas accumulator 13 of 23 MPa or less, the process proceeds to S36.

In steps S33 to S35, the compressor 12
Start up. If this operation is performed while the compressor 12 is operating, it is ignored. Next, the process proceeds to S36. From S36 to S37, the on-off valve 17 of the gas accumulator 16 is opened and the compressed gas is stored in the gas accumulator 16 when the compressor 12 is not operating and not being charged. Next, S38
Proceed to.

In S38 to S42, if all the gas pressure accumulators 16 have reached 24.5 MPa or more, the compressor 12 is terminated. Next, the process proceeds to S43. In S43, the display information is output to the display device 35. Details of this function will be described later in S44 to S65.
This completes the processing of the sampler unit, and restarts after 0.01 seconds.

FIG. 6 is a PAD of the display output function called at S43 in FIG. In S44 of FIG. 6, when any of the setting modes from S1 to S6 in FIG. 1 is being executed, the process proceeds to S45. S4 if normal filling or waiting
Go to 9. In S45, the setting mode and the change item are displayed on the upper stage of the display device 35. For example, "mode 0 gas accumulator 1" is displayed on the display device 35. Next, the process proceeds to S46.

In S46, the value of the item being set is displayed in the middle of the display device 35. For example, “maximum flow rate: 25 kg / min” and “gas accumulator 1 on-off valve open” are displayed on the display device 35. Next, the process proceeds to S55. In steps S47 to S48, the integrated flow rate displayed on the upper stage of the display device 35 is calculated and displayed. That is, in S47, the flow meter 2
The value obtained by multiplying the number of received pulses from 0 by the density coefficient is added to the filling amount. In S48, the filling amount calculated in S47 is displayed on the filling amount display section 35a of the display device 35. Next, the process proceeds to S49.

In steps S49 to S54, the presence or absence of the flow rate display flag is determined, and if the flow rate display flag is on, the instantaneous flow rate is displayed. If the flow rate display flag is off, the light oil equivalent is displayed in the middle stage of the display device 35. I do. That is, S49
In step S50, when the flow rate display flag is on,
Displays "Flow rate:" on the display device 35, and displays the numerical value of the flow rate on the flow rate display section 35b of the display device 35 in S51.

If the flow rate display flag is OFF in S49, the process proceeds to S52, in which the amount of light oil is calculated by multiplying the filling amount by the coefficient of light oil. Then, in S53, “light oil conversion amount:” is displayed on the display device 35, and the display device 3 is displayed in S54.
The numerical value of the gas oil conversion amount is displayed on the flow rate display section 35b of No. 5.

Next, from S55 to S63, the operation mode is displayed. If the setting mode 1 is being executed in S55, the process proceeds to S56. However, if the setting mode 1 is not being executed in S55, the process proceeds to S57. In S56, "manual operation in progress" is displayed on the operation mode display section, and the flow proceeds to S64.

In S57, if the setting mode 0 or 2 is being executed, the flow proceeds to S58. However, in S57,
If the setting mode 0 or 2 is not being executed, the process proceeds to S59. In S58, the operation mode display unit 35 of the display device 35
"System is being set" is displayed in c, and the process proceeds to S64.

If it is determined in step S59 that the filling flag is ON, the process proceeds to step S60. However, if the filling flag is off in S59, the process proceeds to S61. In S60, the display device 3
In the operation mode display section 35c of No. 5, "filling" is displayed and S
Proceed to 64.

If it is determined in step S61 that the coupler 24 is locked by the coupler hook 26, the flow advances to step S62 to display "waiting for filling" on the operation mode display section 35c of the display device 35, and then to step S62.
Proceed to 64. However, if it is determined in S61 that the coupler 24 is not hooked on the coupler hook 26, the process proceeds to S63, in which “standby” is displayed on the operation mode display unit 35c of the display device 35, and the process proceeds to S64.

After calculating the number of segments to be lit on the pressure display section in S64, the process proceeds to S65, where the calculated charging pressure is graphically displayed on the charging pressure display section 35d of the display device 35. This completes the display output process to the display device 35. FIG. 7 is a PAD for explaining the processing in the setting mode 0.
It is.

The setting mode 0 is a mode for setting basic parameters of the system, and is not disclosed to customers in principle. Further, although the mode is common to all modes, the system must be restarted in order to exit the setting mode. S66 is a permanent loop. Therefore, setting mode 0
During the processing of, normal filling and the like cannot be performed.

In the next S67, if the coupler switch 30 has been continuously pressed for a predetermined time (for example, 10 seconds), the process proceeds to S68, where a reset signal is sent to the CPU, and the system is restarted. However, in S67, if the coupler switch 27 has not been pressed continuously for a predetermined time (for example, 10 seconds), the process proceeds to S69, and the change from ON to OFF of the coupler switch 30 is monitored.

In S69, the coupler switch 30
If the setting has changed from on to off, the process proceeds to S70, and the setting item is changed. For example, the setting item 0-2 is followed by the setting item 0-2. The setting item 0-1 is followed by the setting item 0-1. However, the coupler switch 27
Does not change from on to off, the process proceeds to S71. In the next S71, the operation state of the filling start switch button 31 is monitored, and if the filling start switch button 31 has been turned on, the process proceeds to S72, and the plus flag is turned on.

In the next S73, the filling stop switch button 32
When the charging stop switch button 32 has been turned on, the flow proceeds to S74, the minus flag is turned on, and the flow proceeds to S75. In S75 to S80, the processing module for each setting item set in S70 is called. That is, the setting item 0-1 is called in S76, the setting item 0-2 is called in S77, the setting item 0-3 is called in S78, and the setting item 0-4 is called in S79.
Is called, and in S80, the setting items 0-5 are called.

When this process ends, the process returns to the step S66. FIG. 8 is a PAD for explaining processing of a setting item when changing the setting of each system parameter. The operation of selecting the system parameters is performed by an inspection process after an assembly process in a factory, or by an operator when delivered and installed to a customer.

In the processing of the setting items 0-1 shown in FIG. 8A, the number of gas accumulators 16 can be changed. S8
At 1, the presence or absence of a plus flag is monitored. In S81, when the plus flag is ON (when the process of S72 of FIG. 7 is executed), the process proceeds to S82. However, if the plus flag is off in S81, the process proceeds to S85.

In S82, 1 is added to the number of gas accumulators 16, which is a system parameter, to turn off the plus flag. Next, the process proceeds to S83. In S83 to S84, the set value of the number of gas accumulators, which is a system parameter, is monitored. In the present embodiment, the maximum number of gas accumulators 16 is three, so if the number of gas accumulators exceeds "3", the number of gas accumulators is set to "3". Next, the process proceeds to S85.

In S85, the presence or absence of a minus flag is monitored. In S85, if the minus flag is ON (when the process of S74 in FIG. 7 is executed), the process proceeds to S86. However, if the minus flag is off in S85, the process proceeds to S89. In S86, "1" is subtracted from the number of gas accumulators, which is a system parameter, and the minus flag is turned off. Next, the process proceeds to S87.

In S87 to S88, the set value of the number of gas accumulators, which is a system parameter, is monitored. Here, since a system without a gas accumulator is not considered, the minimum number of gas accumulators is one. Therefore, when the number of gas accumulators is "1" or less, the number of gas accumulators is set to "1".
To Next, the process proceeds to S89.

In S89, the process waits for 0.1 second. Here, if there is no waiting time, while a human is pressing the button,
This is because the set value changes at a high speed. After the processing of S89 is executed, this function ends, and S66 in FIG.
Return to In the processing of the setting items 0-2 shown in FIG.
It is possible to change the density coefficient setting of the integrated flow rate.

At S90, the presence or absence of a plus flag is monitored. In S90, if the plus flag is on, S9
At step 1, 0.001 is added to the density coefficient, and the process proceeds to S92. However, if the plus flag is off in S81, the process proceeds to S85. In S92, when the density coefficient exceeds 100, the process proceeds to S93, and the density coefficient is set to 100.

If the minus flag is ON in S94, the process proceeds to S95, and 0.001 is subtracted from the density coefficient. Then, in S96, the density coefficient is 0.00
It is determined whether it is smaller than 1. Density coefficient 0.00
If it is smaller than 1, the process proceeds to S97, and the density coefficient is set to 0.0
Set to 01.

Then, the process waits for 0.05 seconds in S98. In the processing of the setting items 0-3 shown in FIG. 8C, it is possible to change the switching setting between the flow rate display and the light oil equivalent amount display. In S99, the presence or absence of a plus flag is monitored.
In S99, if the plus flag is on, S100
Turn on the flow rate display flag with.

If it is determined in step S101 that the minus flag is on, the flow advances to step S102 to turn off the flow rate display flag. Then, the process waits for 0.05 seconds in S103. In the processing of the setting items 0-4 shown in FIG. 8D, it is possible to change the coefficient setting of the gas oil conversion amount calculation.

In S104, the presence or absence of a plus flag is monitored. If the plus flag is on in S104,
In S105, 0.001 is added to the coefficient of the gas oil conversion amount.
Then, in S106, if the coefficient of light oil equivalent exceeds 10, the process proceeds to S107, and the coefficient of light oil equivalent is set to 10.

If the minus flag is ON in S108, the process proceeds to S109, where 0.001 is subtracted from the coefficient of the gas oil conversion amount. Then, in S110, when the coefficient of the light oil conversion amount is smaller than 0.1, the process proceeds to S111, and the coefficient of the light oil conversion amount is set to 0.1.

Then, the process waits for 0.05 seconds in S112. In the processing of the setting items 0-5 shown in FIG. 8E, the setting of the loop gain for filling control can be changed. In S113, the presence or absence of a plus flag is monitored. S
If the plus flag is ON in S113, S114
Add 0.01 to the gain. Then, in S115, when the gain exceeds 100, the process proceeds to S116, and the gain is set to 100.

If the minus flag is ON in S117, the process proceeds to S118, where 0.01 is subtracted from the gain. Then, in S119, the gain is 0.0
If it is smaller than 1, the process proceeds to S120 and the gain is set to 0.0
Set to 1. Then, it waits for 0.05 seconds in S121.

When the above setting is completed, the process returns to S66 in FIG. FIG. 9 is a flowchart of the system initialization executed by the control device 34 at the time of gas filling. The control device 34
In S131, when the connection coupler 26 is removed from the coupler hook 29 and the coupler hook switch 30 is turned off, S
In step 132, the system parameters and the high-speed filling system parameters (see FIG. 2) are read from the SRAM 45.

In S133, check data for checking the parameters stored in the SRAM 45 is read from the ROM 44. Then, the process proceeds to S134, where the parameters stored in the SRAM 45 and the ROM 44
Compare with the check data read from. The parameter determination process using the check data is similar to the generally used CRC (Cyclic Redundacy Check) or ECC (Error Correcting Code), and the description thereof is omitted.

In the next step S135, when each parameter stored in the SRAM 45 does not match the check data, it is determined that there is no error, that is, each parameter stored in the SRAM 45 is destroyed, and the SRA
When the parameters stored in the M45 match the check data, it is determined that there is an error, that is, that each parameter stored in the SRAM 45 is stored normally.

Accordingly, when it is determined in S135 that there is no error, since the parameters stored in the SRAM 45 are normally stored, the process proceeds to S136, and the processing of the filling system idle unit is executed. If it is determined in S135 that there is an error, the parameters stored in the SRAM 45 are not normal, and the process proceeds to S137, where "SRAM parameter error" is displayed on the display device 35 to notify the operator. Thereby, the worker can use the SRAM 45.
After the gas filling is completed, the SRAM 45 is inspected to determine regular parameters and high-speed filling system parameters. The setting of the parameters can be performed in the setting mode described above.

Subsequently, the flow advances to S138, where the common system parameters (see FIG. 2) are read from the ROM 44. Then, in the next S139, the common system parameters read from the ROM 44 are overwritten on the respective parameters and the high-speed filling system parameters stored in the SRAM 45. Thus, the common system parameters are registered in the SRAM 45, and the abnormal parameters and the high-speed filling system parameters are deleted.

Thereafter, the flow shifts to S136, where processing in a filling system idle section is executed. In the above embodiment, the case where compressed natural gas (CNG) obtained by compressing city gas is supplied as an example. However, the present invention is not limited to this, and it is also applicable to supply gas such as butane and propane. Of course.

In the above embodiment, the case where the compressed gas is filled in the fuel tank 3 of the automobile has been described as an example. However, the present invention is not limited to this, and the apparatus for supplying the compressed gas to another container or the like may be used. Of course, the present invention can also be applied to an apparatus having a configuration in which the compressed gas is installed in the middle of a pipe for feeding the compressed gas to another place.

In the above embodiment, the common system parameters are stored in the ROM. However, the present invention is not limited to this.
For example, the value of the common system parameter may be set by a dip switch or the like.

[0089]

As described above, according to the present invention, when it is determined that the high-speed filling system parameters are not normally stored in the storage unit, the system parameters are set based on the common system parameters set by the system parameter setting unit. To calculate the pressure or flow rate for filling the tank to be filled, the system parameter setting means can be used to set the high-speed filling system parameters even if an error occurs in the storage means that stores the high-speed filling system parameters and the high-speed filling system parameters cannot be read. The gas filling process can be executed using the set common system parameters. Therefore, even when the gas filling process cannot be performed by the high-speed filling system parameter, the gas filling cannot be disabled, and the pressure or flow rate to be filled can be calculated by the common system parameter to fill the tank to be filled at a low speed. It is possible to prevent the gas filling process from stopping even before the high-speed filling system parameters are reset.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a gas supply device according to the present invention.

FIG. 2 is a diagram showing items of a high-speed filling system parameter and a common system parameter.

FIG. 3 is a diagram showing a display example displayed on a screen of a display device during gas filling.

FIG. 4 is a PAD of idler processing.

FIG. 5 is a PAD for explaining the processing of the sampler unit.

FIG. 6 is a PAD of a display output function called in S43 in FIG. 4;

FIG. 7 is a PAD for explaining processing in setting mode 0;

FIG. 8 is a PAD for explaining processing of a setting item when changing the setting of each system parameter.

FIG. 9 is a flowchart of a system initialization process executed by the control device at startup.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas supply device 3 Fuel tank 4 Pressure generating unit 5 Dispenser unit 12 Compressor 16 Gas accumulator 17 Gas accumulator open / close valve 18 Gas supply line 19 Gas supply on / off valve 20 Mass flow meter 21 Control valve 22 Pressure transmitter 23 Gas filling Hose 24 Three-way valve 26, 36 Connection coupler 30 Coupler switch 31 Fill start button 32 Fill stop button 33 Emergency stop button 34 Control device 35 Display device 44 ROM 45 SRAM

Claims (1)

[Claims] 1. A high-speed filling system parameter, which is a coefficient for compensating a high-speed filling condition of each filling station, is stored, and a tank to be filled is filled using the high-speed filling system parameter. Calculate pressure or flow rate,
In the gas supply device that performs high-speed filling of the tank to be filled, a system parameter setting unit that sets a common system parameter that can be used at any filling station, and a storage state of the high-speed filling system parameter stored in the storage unit. Storage state determination means for determining; and a common system parameter set by the system parameter setting means when the storage state determination means determines that the high-speed filling system parameter is not normally stored in the storage means. Calculating means for calculating a pressure or a flow rate for filling the tank to be filled on the basis of the following formula: