| 主权项 |
1. A fuel cell system comprising:
a fuel cell; a fuel gas system which supplies a fuel gas to the fuel cell and circulates the gas discharged from the fuel cell; a purge valve which discharges the gas from the fuel gas system; and a control device that controls the opening/closing operation of the purge valve, wherein a partial pressure of impurities in the fuel gas system is increased more than in a case of ordinary temperature, when the operation temperature of the fuel cell is higher than the ordinary temperature, and wherein the control device controls the opening/closing operation of the purge valve so that partial pressure of impurities in the fuel gas system is constant in the entire load region, in a case where the operation temperature of the fuel cell is the ordinary temperature, and so that the partial pressure of impurities in the fuel gas system is constant in the entire load region, in a case where the operation temperature of the fuel cell is higher than the ordinary temperature, wherein the control device controls the opening/closing operation of the purge valve so as to increase the amount of the gas discharged from the fuel gas system, as the operation temperature of the fuel cell rises. |
