JP5228263B2 - Fuel cell system - Google Patents

Description

  The present invention relates to a fuel cell system.

  Currently, a fuel cell system including a fuel cell that receives a supply of reaction gas (fuel gas and oxidizing gas) and generates electric power has been proposed and put into practical use. Such a fuel cell system is provided with a fuel supply channel for flowing fuel gas supplied from a fuel supply source such as a hydrogen tank to the fuel cell.

  In recent years, a technique has been proposed in which an injector is disposed in a fuel supply channel of a fuel cell system and the pressure of fuel gas in the fuel supply channel is adjusted by controlling the operating state of the injector (for example, Patent Document 1). The injector is an electromagnetically driven on-off valve that can adjust the gas state (gas flow rate and gas pressure) by driving the valve body directly with a predetermined driving cycle with electromagnetic driving force and separating it from the valve seat It is. By controlling the fuel gas injection timing and injection time by driving the valve body of the injector, the control device can control the flow rate and pressure of the fuel gas.

JP 2007-165163 A

  In the conventional fuel cell system described in Patent Document 1 described above, a command value for the injection flow rate of the injector is calculated using the feedback correction value and the feedforward correction value, and the injector flow rate is calculated based on this command value. The operation is controlled. However, in such a conventional fuel cell system, the “driving cycle” is not taken into account when calculating the command value of the injection flow rate, so that the pressure regulation error increases when the driving cycle varies (the detected pressure in the vicinity of the injector). The deviation between the value and the predetermined target pressure value may increase).

  The present invention has been made in view of such circumstances, and in a fuel cell system in which an on-off valve such as an injector is disposed in a fuel supply flow path, a pressure adjustment error when the driving cycle of the on-off valve fluctuates is reduced. The purpose is to improve responsiveness.

  To achieve the above object, a fuel cell system according to the present invention includes a fuel cell, a fuel supply channel for supplying fuel gas supplied from a fuel supply source to the fuel cell, and the fuel supply channel. A fuel cell system comprising: an on-off valve that adjusts an upstream gas state and supplies the gas to the downstream side; and a control unit that drives and controls the on-off valve. The control unit feeds based on a driving cycle of the on-off valve. The forward correction flow rate is calculated, the command value of the gas injection flow rate of the on-off valve is corrected using the feed forward correction flow rate, and the on-off valve is driven and controlled based on the command value.

  When such a configuration is adopted, the command value of the gas injection flow rate from the on-off valve is corrected using the feedforward correction flow rate calculated based on the driving cycle of the on-off valve, and the on-off valve is driven and controlled based on this command value. can do. Accordingly, even when the driving cycle of the on-off valve fluctuates, the command value of the gas injection flow rate can be corrected in consideration of the fluctuating driving cycle, so that the pressure adjustment error is reduced (the detected pressure in the vicinity of the on-off valve). The deviation between the value and the predetermined target pressure value can be reduced), and the responsiveness can be improved. The “gas state” means a gas state represented by a flow rate, pressure, temperature, molar concentration, etc., and particularly includes at least one of a gas flow rate and a gas pressure.

  The fuel cell system may include a fuel circulation system having a circulation channel for returning gas discharged from the fuel cell to the fuel supply channel. In such a case, it is possible to employ control means for calculating the feedforward correction flow rate based on the driving cycle of the on-off valve, the volume of the fuel circulation system, and the gas temperature in the fuel circulation system. The “fuel circulation system” is composed of a part of the fuel supply channel (portion downstream from the junction with the circulation channel), a fuel gas channel in the fuel cell, and a circulation channel. Means the space to be played.

  In the fuel cell system, an injector can be employed as the on-off valve.

  According to the present invention, in a fuel cell system in which an on-off valve such as an injector is arranged in a fuel supply flow path, the pressure regulation error when the on-off valve drive cycle fluctuates is reduced, and the responsiveness is improved. Is possible.

1 is a configuration diagram of a fuel cell system according to an embodiment of the present invention. It is a control block diagram for demonstrating the control aspect of the control apparatus of the fuel cell system shown in FIG. 2 is a flowchart for explaining an operation method of the fuel cell system shown in FIG. 1.

  Hereinafter, a fuel cell system 1 according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an example in which the present invention is applied to an on-vehicle power generation system of a fuel cell vehicle will be described.

  First, the configuration of the fuel cell system 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the fuel cell system 1 according to the present embodiment includes a fuel cell 10 that generates electric power upon receiving a supply of reaction gas (oxidation gas and fuel gas), and the fuel cell 10 has an oxidant gas. An oxidizing gas piping system 2 for supplying the air, a hydrogen gas piping system 3 for supplying hydrogen gas as a fuel gas to the fuel cell 10, a control device 4 for integrated control of the entire system, and the like.

  The fuel cell 10 has a stack structure in which a required number of unit cells that generate power upon receiving a reaction gas are stacked. The electric power generated by the fuel cell 10 is supplied to a PCU (Power Control Unit) 11. The PCU 11 includes an inverter, a DC-DC converter, and the like that are disposed between the fuel cell 10 and the traction motor 12. Further, the fuel cell 10 is provided with a current sensor 13 for detecting a current during power generation.

  The oxidant gas piping system 2 includes an air supply passage 21 that supplies the oxidant gas (air) humidified by the humidifier 20 to the fuel cell 10, and an air exhaust that guides the oxidant off-gas discharged from the fuel cell 10 to the humidifier 20. A flow path 22 and an exhaust flow path 23 for guiding the oxidizing off gas from the humidifier 21 to the outside are provided. The air supply passage 21 is provided with a compressor 24 that takes in the oxidizing gas in the atmosphere and pumps it to the humidifier 20.

  The hydrogen gas piping system 3 includes a hydrogen tank 30 as a fuel supply source storing high-pressure (for example, 70 MPa) hydrogen gas, and hydrogen as a fuel supply passage for supplying the hydrogen gas from the hydrogen tank 30 to the fuel cell 10. A supply flow path 31 and a circulation flow path 32 for returning the hydrogen off-gas discharged from the fuel cell 10 to the hydrogen supply flow path 31 are provided. Instead of the hydrogen tank 30, a reformer that generates a hydrogen-rich reformed gas from a hydrocarbon-based fuel, a high-pressure gas tank that stores the reformed gas generated by the reformer in a high-pressure state, and Can also be employed as a fuel supply source. A tank having a hydrogen storage alloy may be employed as a fuel supply source.

  The hydrogen supply flow path 31 is provided with a shutoff valve 33 that shuts off or allows the supply of hydrogen gas from the hydrogen tank 30, a regulator 34 that adjusts the pressure of the hydrogen gas, and an injector 35. A primary pressure sensor 41 and a temperature sensor 42 that detect the pressure and temperature of the hydrogen gas in the hydrogen supply flow path 31 are provided on the upstream side of the injector 35. Further, on the downstream side of the injector 35 and upstream of the junction between the hydrogen supply flow path 31 and the circulation flow path 32, a secondary side pressure sensor 43 that detects the pressure of the hydrogen gas in the hydrogen supply flow path 31. Is provided.

  The regulator 34 is a device that regulates the upstream pressure (primary pressure) to a preset secondary pressure. In the present embodiment, a mechanical pressure reducing valve that reduces the primary pressure is employed as the regulator 34. The mechanical pressure reducing valve has a structure in which a back pressure chamber and a pressure adjusting chamber are formed with a diaphragm therebetween, and the primary pressure is reduced to a predetermined pressure in the pressure adjusting chamber by the back pressure in the back pressure chamber. Thus, a publicly known configuration for the secondary pressure can be employed. In the present embodiment, as shown in FIG. 1, the upstream pressure of the injector 35 can be effectively reduced by arranging two regulators 34 on the upstream side of the injector 35. For this reason, the design freedom of the mechanical structure (a valve body, a housing, a flow path, a drive device, etc.) of the injector 35 can be increased. In addition, since the upstream pressure of the injector 35 can be reduced, it is possible to prevent the valve body of the injector 35 from becoming difficult to move due to an increase in the differential pressure between the upstream pressure and the downstream pressure of the injector 35. be able to. Accordingly, it is possible to widen the adjustable pressure width of the downstream pressure of the injector 35 and to suppress a decrease in responsiveness of the injector 35.

  The injector 35 is an electromagnetically driven on-off valve capable of adjusting the gas flow rate and gas pressure by driving the valve body directly with a predetermined driving cycle with an electromagnetic driving force and separating it from the valve seat. The injector 35 includes a valve seat having an injection hole for injecting gaseous fuel such as hydrogen gas, a nozzle body for supplying and guiding the gaseous fuel to the injection hole, and an axial direction (gas flow direction) with respect to the nozzle body. And a valve body that is movably accommodated and opens and closes the injection hole. The valve body of the injector 35 is driven by a solenoid, for example, and the opening area of the injection hole can be switched between two stages or multiple stages by turning on and off the pulsed excitation current supplied to the solenoid. The gas injection time and gas injection timing of the injector 35 are controlled by a control signal output from the control device 4, whereby the flow rate and pressure of hydrogen gas are controlled with high accuracy. The injector 35 directly opens and closes the valve (valve body and valve seat) with an electromagnetic driving force, and has a high responsiveness because its driving cycle can be controlled to a highly responsive region.

  In the present embodiment, as shown in FIG. 1, the injector 35 is disposed on the upstream side of the junction A <b> 1 between the hydrogen supply flow path 31 and the circulation flow path 32. Further, as shown by a broken line in FIG. 1, when a plurality of hydrogen tanks 30 are employed as the fuel supply source, the hydrogen gas supplied from each hydrogen tank 30 joins more than the part (hydrogen gas joining part A2). The injector 35 is arranged on the downstream side.

  A discharge flow path 38 is connected to the circulation flow path 32 via a gas-liquid separator 36 and an exhaust drain valve 37. The gas-liquid separator 36 collects moisture from the hydrogen off gas. The exhaust / drain valve 37 operates according to a command from the control device 4 to discharge (purge) the moisture collected by the gas-liquid separator 36 and the hydrogen off-gas containing impurities in the circulation flow path 32 to the outside. Is. In addition, the circulation channel 32 is provided with a hydrogen pump 39 that pressurizes the hydrogen off gas in the circulation channel 32 and sends it to the hydrogen supply channel 31 side. The hydrogen off-gas discharged through the exhaust / drain valve 37 and the discharge passage 38 is diluted by the diluter 40 and merges with the oxidizing off-gas in the exhaust passage 23. The portion of the hydrogen supply channel 31 downstream from the confluence point A1, the fuel gas channel formed in the separator of the fuel cell 10, and the circulation channel 32 constitute a fuel circulation system in the present invention. The Rukoto.

  The control device 4 detects an operation amount of an acceleration operation member (accelerator or the like) provided in the vehicle, receives control information such as an acceleration request value (for example, a required power generation amount from a load device such as the traction motor 12), Control the operation of various devices in the system. In addition to the traction motor 12, the load device is an auxiliary device (for example, a motor for the compressor 24, a motor for the hydrogen pump 39, etc.) necessary for operating the fuel cell 10, and various devices involved in traveling of the vehicle. It is a collective term for power consumption devices including actuators used in (transmissions, wheel control devices, steering devices, suspension devices, etc.), occupant space air conditioners (air conditioners), lighting, audio, and the like.

  The control device 4 is configured by a computer system (not shown). Such a computer system includes a CPU, ROM, RAM, HDD, input / output interface, display, and the like, and various control operations are realized by the CPU reading and executing various control programs recorded in the ROM. It is like that.

  Specifically, as shown in FIG. 2, the control device 4 is consumed by the fuel cell 10 based on the operating state of the fuel cell 10 (current value during power generation of the fuel cell 10 detected by the current sensor 13). The amount of hydrogen gas (hereinafter referred to as “hydrogen consumption”) is calculated (fuel consumption calculation function: B1). In the present embodiment, the hydrogen consumption is calculated and updated for each calculation cycle of the control device 4 using a specific calculation formula representing the relationship between the current value of the fuel cell 10 and the hydrogen consumption.

  Further, the control device 4 determines the target pressure value of hydrogen gas (to the fuel cell 10) at the downstream position of the injector 35 based on the operating state of the fuel cell 10 (current value at the time of power generation of the fuel cell 10 detected by the current sensor 13). Target gas supply pressure) (target pressure value calculation function: B2). In the present embodiment, the target at the position where the secondary pressure sensor 43 is arranged for each calculation cycle of the control device 4 using a specific map representing the relationship between the current value of the fuel cell 10 and the target pressure value. The pressure value is calculated and updated.

  Further, the control device 4 calculates a feedback correction flow rate based on the deviation between the calculated target pressure value and the pressure value (detected pressure value) at the downstream position of the injector 35 detected by the secondary pressure sensor 43 (feedback). Correction flow rate calculation function: B3). The feedback correction flow rate is a hydrogen gas flow rate that is added to the hydrogen consumption in order to reduce the deviation between the target pressure value and the detected pressure value. In the present embodiment, the feedback correction flow rate is calculated and updated every calculation cycle of the control device 4 using the PI type feedback control law.

  Further, the control device 4 determines the drive cycle of the injector 35 based on the calculated hydrogen consumption and the primary pressure value (pressure of hydrogen gas upstream of the injector 35) detected by the primary pressure sensor 41. Calculate (primary drive cycle calculation function: B4). Here, the drive cycle means a stepped (on / off) waveform cycle representing the open / close state of the injection hole of the injector 35. In the present embodiment, the driving cycle is calculated and updated every calculation cycle of the control device 4 using a specific map representing the relationship between the hydrogen consumption, the primary pressure value, and the driving cycle. The driving cycle calculated here is a temporary value used only for calculating the feedforward correction flow rate.

Further, the control device 4 calculates a feedforward corrected flow rate based on the calculated driving cycle, pressure deviation (deviation between the target pressure value and the detected pressure value), etc. (feedforward corrected flow rate calculation function: B5). In the present embodiment, the feedforward correction flow rate is calculated by calculating the feedforward gain G _FF corresponding to the driving cycle and the like and multiplying the feedforward gain G _FF by the pressure deviation using the following relational expression. I am going to do that. The control device 4 functions as control means in the present invention.
G _FF = k × V × {273 / (273 + T)} × (1000 / T _cycle ) × 60

However, in the above relational expression, k (= 1 / 101.3) means a unit conversion coefficient. Further, in the above relational expression, V (L) is the fuel circulation system volume (portion downstream from the confluence A1 of the hydrogen supply passage 31, the fuel gas passage formed in the separator of the fuel cell 10, and the circulation The volume of the space comprised from the flow path 32 is meant. In the above relational expression, T (° C.) means an estimated value of the temperature of the hydrogen gas on the downstream side of the injector 35 in the hydrogen supply channel 31. In the present embodiment, the temperature of the hydrogen gas on the downstream side of the injector 35 is estimated based on the temperature of the hydrogen gas detected by the temperature sensor 42. In the relational expression, Tcycle (ms) means the calculated driving cycle of the injector 35. By employing feedforward G _FF calculated by such equation, in one drive cycle of the injector 35, it is possible to bring the detected pressure value to the target pressure value.

  Further, the control device 4 determines the static flow rate upstream of the injector 35 based on the gas state upstream of the injector 35 (hydrogen gas pressure detected by the primary pressure sensor 41 and hydrogen gas temperature detected by the temperature sensor 42). Is calculated (static flow rate calculation function: B6). In the present embodiment, the static flow rate is calculated for each calculation cycle of the control device 4 using a specific calculation formula representing the relationship between the pressure and temperature of the hydrogen gas upstream of the injector 35 and the static flow rate. We are going to update.

  The control device 4 calculates the invalid injection time of the injector 35 based on the gas state upstream of the injector 35 (pressure and temperature of hydrogen gas) and the applied voltage (invalid injection time calculation function: B7). Here, the invalid injection time means the time required from when the injector 35 receives a control signal from the control device 4 until the actual injection is started. In the present embodiment, the invalid injection time is calculated for each calculation cycle of the control device 4 using a specific map representing the relationship between the pressure and temperature of the hydrogen gas upstream of the injector 35, the applied voltage, and the invalid injection time. I am going to update it.

  Further, the control device 4 calculates the injection flow rate of the injector 35 by adding the hydrogen consumption amount, the feedback correction flow rate, and the feedforward correction flow rate (injection flow rate calculation function: B8). Further, the control device 4 calculates the drive cycle of the injector 35 based on the injection flow rate of the injector 35 and the primary pressure value detected by the primary pressure sensor 41 (secondary drive cycle calculation function: B9). ). In the present embodiment, the drive cycle is calculated and updated every calculation cycle of the control device 4 using a specific map representing the relationship between the injection flow rate of the injector 35, the primary pressure value, and the drive cycle. .

  In addition, the control device 4 calculates the basic injection time of the injector 35 by multiplying the value obtained by dividing the injection flow rate of the injector 35 by the static flow rate by the drive cycle of the injector 35, and the basic injection time and the invalid injection time. Are added to calculate the total injection time of the injector 35 (total injection time calculation function: B10). And the control apparatus 4 controls the gas injection time and gas injection timing of the injector 35 by outputting the control signal for implement | achieving the total injection time of the injector 35 computed through the above procedure, and fuel cell The flow rate and pressure of the hydrogen gas supplied to 10 are adjusted.

  Next, an operation method of the fuel cell system 1 according to the present embodiment will be described using the flowchart of FIG.

  During normal operation of the fuel cell system 1, hydrogen gas is supplied from the hydrogen tank 30 to the fuel electrode of the fuel cell 10 through the hydrogen supply channel 31, and the air that has been subjected to humidification adjustment passes through the air supply channel 21. Then, power is generated by being supplied to the oxidation electrode of the fuel cell 10. At this time, the power (required power) to be drawn from the fuel cell 10 is calculated by the control device 4, and hydrogen gas and air in an amount corresponding to the amount of power generation are supplied into the fuel cell 10. In the present embodiment, the pressure of hydrogen gas supplied to the fuel cell 10 during such normal operation is controlled with high accuracy.

  That is, first, the control device 4 of the fuel cell system 1 uses the current sensor 13 to detect a current value during power generation of the fuel cell 10 (current detection step: S1). Next, the control device 4 calculates the amount of hydrogen gas (hydrogen consumption) consumed by the fuel cell 10 based on the current value detected by the current sensor 13 (fuel consumption calculation step: S2).

  Next, the control device 4 calculates the target pressure value of the hydrogen gas at the downstream position of the injector 35 based on the current value detected by the current sensor 13 (target pressure value calculating step: S3). Moreover, the control apparatus 4 detects the pressure value of the injector 35 downstream position using the secondary side pressure sensor 43 (pressure value detection process: S4). And the control apparatus 4 is a feedback correction | amendment flow volume based on the deviation (pressure deviation) of the target pressure value calculated by target pressure value calculation process S3, and the pressure value (detection pressure value) detected by pressure value detection process S4. Is calculated (feedback correction flow rate calculation step: S5).

  Further, the control device 4 is based on the hydrogen consumption calculated in the fuel consumption calculation step S2 and the primary pressure value (pressure of hydrogen gas upstream of the injector 35) detected by the primary pressure sensor 41. While calculating the drive period (temporary value) of the injector 35, a feedforward correction | amendment flow volume is calculated based on this calculated drive period, a pressure deviation, etc. (feedforward correction | amendment flow rate calculation process: S6).

  Next, the control device 4 calculates the hydrogen consumption calculated in the fuel consumption flow rate calculation step S2, the feedback correction flow rate calculated in the feedback correction flow rate calculation step S5, and the feedforward correction flow rate calculated in the feedforward correction flow rate calculation step S6. Are added to calculate the injection flow rate of the injector 35 (injection flow rate calculation step: S7).

  Next, the control device 4 calculates the static flow rate upstream of the injector 35 based on the primary pressure detected by the primary pressure sensor 41 and the temperature of the hydrogen gas upstream of the injector 35 detected by the temperature sensor 42. (Static flow rate calculation step: S8). Further, the control device 4 calculates the drive cycle of the injector 35 based on the injection flow rate of the injector 35 calculated in the injection flow rate calculation step S7 and the primary pressure value detected by the primary pressure sensor 41 (drive). Period calculation step: S9). Then, the control device 4 calculates the basic injection time of the injector 35 by multiplying the value obtained by dividing the injection flow rate of the injector 35 by the static flow rate by the drive cycle of the injector 35 (basic injection time calculation step: S10). .

  Next, the control device 4 is based on the pressure of the hydrogen gas upstream of the injector 35 detected by the primary pressure sensor 41, the temperature of the hydrogen gas upstream of the injector 35 detected by the temperature sensor 42, and the applied voltage. The invalid injection time of the injector 35 is calculated (invalid injection time calculation step: S11). Then, the control device 4 adds the basic injection time of the injector 35 calculated in the basic injection time calculation step S10 and the invalid injection time calculated in the invalid injection time calculation step S11, so that the total injection time of the injector 35 is increased. Is calculated (total injection time calculating step: S12).

  Thereafter, the control device 4 controls the gas injection time and the gas injection timing of the injector 35 by outputting a control signal related to the total injection time of the injector 35 calculated in the total injection time calculating step S12, so that the fuel cell 10 The flow rate and pressure of hydrogen gas supplied to the are adjusted.

  In the fuel cell system 1 according to the embodiment described above, the command value of the gas injection flow rate from the injector 35 is corrected based on the feedforward correction flow rate calculated based on the drive cycle of the injector 35, and the command value It is possible to drive and control the injector 35 based on the above. Therefore, even when the drive cycle of the injector 35 fluctuates, the command value of the gas injection flow rate can be corrected in consideration of the fluctuated drive cycle, so that the pressure adjustment error is reduced (detection on the downstream side of the injector 35). The deviation between the pressure value and the predetermined target pressure value can be reduced), and the responsiveness can be improved.

  In the above embodiment, an example in which the circulation channel 32 is provided in the hydrogen gas piping system 3 of the fuel cell system 1 has been described. However, the circulation channel 32 is directly connected to the fuel cell 10 with the discharge channel 38. Can be abolished. Even when such a configuration (dead end method) is adopted, the control device 4 calculates the feedforward correction flow rate according to the drive cycle of the injector 35 in the same manner as in the above-described embodiment, so that the same effect as in the above-described embodiment. Can be obtained.

  Moreover, in the above embodiment, although the example which provided the hydrogen pump 39 in the circulation flow path 32 was shown, it replaces with the hydrogen pump 39 and an ejector may be employ | adopted. In the above embodiment, the example in which the shutoff valve 33 and the regulator 34 are provided in the hydrogen supply flow path 31 has been described. However, the injector 35 functions as a variable pressure control valve and shuts off the supply of hydrogen gas. Therefore, it is not always necessary to provide the shut-off valve 33 and the regulator 34. Therefore, when the injector 35 is employed, the shut-off valve 33 and the regulator 34 can be omitted, so that the system can be reduced in size and cost.

  Further, in the above embodiment, the example in which the feedback correction flow rate is calculated using the PI type feedback control law is shown, but the feedback correction flow rate is calculated using another target tracking type control law (for example, PID type feedback control law). Can also be calculated.

  In each of the above embodiments, the fuel cell system according to the present invention is mounted on the fuel cell vehicle. However, the present invention is applied to various mobile bodies (robots, ships, airplanes, etc.) other than the fuel cell vehicle. Such a fuel cell system can also be mounted. Further, the fuel cell system according to the present invention may be applied to a stationary power generation system used as a power generation facility for a building (house, building, etc.).

  DESCRIPTION OF SYMBOLS 1 ... Fuel cell system, 4 ... Control apparatus (control means), 10 ... Fuel cell, 30 ... Hydrogen tank (fuel supply source), 31 ... Hydrogen supply flow path (fuel supply flow path), 32 ... Circulation flow path, 35 ... injector (open / close valve).

Claims (3)

A fuel cell, a fuel supply channel for supplying fuel gas supplied from a fuel supply source to the fuel cell, and a downstream by adjusting the gas flow rate and / or gas pressure upstream of the fuel supply channel A fuel cell system comprising: an on-off valve supplied to the side; and a control means for drivingly controlling the on-off valve so that the pressure of the fuel gas on the downstream side of the on-off valve becomes a target pressure ,
Downstream from the junction of a circulation channel for returning gas discharged from the fuel cell to the fuel supply channel, a fuel gas channel in the fuel cell, and the circulation channel of the fuel supply channel A fuel circulation system constituted by a side part,
The control means calculates a temporary drive cycle for calculating a correction flow rate of the on-off valve based on a fuel gas consumption amount in the fuel cell and a pressure of the fuel gas upstream of the on-off valve, and the fuel circulation system A feed forward gain G _FF is calculated by multiplying a value obtained by dividing the volume of the fuel by the provisional driving cycle by a predetermined coefficient, and a pressure deviation which is a deviation between the pressure of the fuel gas and the target pressure downstream of the on-off valve by the fact that calculating the feed-forward correction flow rate by multiplying the feed-forward gain G _FF, adds the feedback correction flow rate and the feed forward correction flow rate to reduce the pressure difference in the fuel gas consumption in the fuel cell driving the on-off valve based on the control signal to calculate the gas injection flow rate of the on-off valve, corresponding to the gas injection flow rate It is Gosuru thing,
Fuel cell system. The control means includes
G _FF = k × V × {273 / (273 + T)} × (1000 / T _cycle ) × 60
(K: unit conversion coefficient, V (L): volume of the fuel circulation system, T (° C.): temperature of the fuel gas on the downstream side of the on-off valve, T _cycle (ms): the provisional driving cycle) The feedforward gain G _FF is calculated.
The fuel cell system according to claim 1. The on-off valve is an injector;
The fuel cell system according to claim 1 or 2.

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