Method of controlling fuel cell vehicle and fuel cell system
First Claim
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1. A method of controlling a fuel cell vehicle having a load energizable by electric power generated by a fuel cell from hydrogen supplied from a hydrogen storage device and an oxygen-containing gas supplied from an air pump, comprising the steps of:
- performing a rate limiting control process for reducing the electric power generated by the fuel cell to reduce a frequency at which a voltage generated by the fuel cell is equal to or higher than a predetermined voltage when electric power requested by the load is lowered, wherein, during the rate limiting control process;
an increase in the voltage generated by the fuel cell is limited, andan allowable reduction in an output of the fuel cell is made smaller as the output of the fuel cell is smaller,changing a rotational speed of the air pump in correspondence with the electric power requested by the load, andcharging an electric energy storage with excessive electric power produced by the fuel cell in the rate limiting control process.
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Abstract
A fuel cell vehicle is controlled by performing a rate limiting control process for reducing electric power generated by a fuel cell to reduce a frequency at which a voltage generated by the fuel cell is equal to or higher than a predetermined voltage when electric power requested by a load is lowered, and changing a rotational speed of an air pump depending on the electric power requested by the load when the electric power generated by the fuel cell is reduced.
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Citations
9 Claims
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1. A method of controlling a fuel cell vehicle having a load energizable by electric power generated by a fuel cell from hydrogen supplied from a hydrogen storage device and an oxygen-containing gas supplied from an air pump, comprising the steps of:
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performing a rate limiting control process for reducing the electric power generated by the fuel cell to reduce a frequency at which a voltage generated by the fuel cell is equal to or higher than a predetermined voltage when electric power requested by the load is lowered, wherein, during the rate limiting control process; an increase in the voltage generated by the fuel cell is limited, and an allowable reduction in an output of the fuel cell is made smaller as the output of the fuel cell is smaller, changing a rotational speed of the air pump in correspondence with the electric power requested by the load, and charging an electric energy storage with excessive electric power produced by the fuel cell in the rate limiting control process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification