Fuel cell system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKenji Umayahara
Life of this patent
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Abstract
A basic injection time of an injector is obtained from an FC current detected in step S1. The basic injection time based on the FC current is multiplied by a predetermined correction coefficient for correction (learning), and the thus obtained value is re-defined as the basic injection time to obtain an injection time feedforward term (F/F term) to be obtained finally. The correction coefficient K is set by obtaining a flow rate characteristic per unit drive time of the injector in accordance with the relation between a total drive time and a total injection quantity of the injector until an FC inlet pressure on the anode side of a fuel cell reaches a predetermined target pressure by increasing the FC inlet pressure to the target pressure at a system start. The correction coefficient K is updated every system start.
Claims12
A fuel cell system comprising:
- a fuel cell;
- a fuel supply system which supplies a fuel gas to this fuel cell;
- a gas state variable supply device which adjusts the gas state of this fuel supply system on an upstream side to supply the gas to a downstream side;
- and control device for driving and controlling the gas state variable supply device in accordance with the operation state of the fuel cell,
- the system further comprising:
- learning device for learning the driving characteristics of the gas state variable supply device to set the driving parameter of the gas state variable supply device based on the result of the learning, the learning device being configured to learn the driving characteristics by use of at least a first value based on a gas supply change having a predetermined value or more in the gas state variable supply device and a second value based on the operation command value of the gas state variable supply device.
A fuel cell system comprising:
- a fuel cell;
- a fuel supply system which supplies a fuel gas to this fuel cell;
- a gas state variable supply device which adjusts the gas state of this fuel supply system on an upstream side to supply the gas to a downstream side;
- and control device for driving and controlling the gas state variable supply device in accordance with the operation state of the fuel cell,
- the system further comprising:
- learning device for learning the driving characteristics of the gas state variable supply device to set the driving parameter of the gas state variable supply device based on the result of the learning, the learning device being configured to drive the gas state variable supply device on mutually different driving conditions and to learn the invalid supply time of the gas state variable supply device from the number of fuel gas supply times on these driving conditions.
Dependencies are inferred from the claim text.