A fuel cell system and an engine control method of addition and subtraction carrier

A fuel cell system and an engine acceleration overload control method, system includes an air system, the hydrogen system, cooling system, and a stack module electronic control system; in the hydrogen system adds a valve member mounted in the control stack of the hydrogen gas inlet and electrically a buffer tank between the pipe line, the buffer tank volume is greater than the required volume of the anode gas when the load equal to the limit speed. The system control method includes subtraction carrier gas in the buffer tank to the upper limit, contained in the fuel cell during the engine acceleration, controlling a cathode contained subtraction, addition and subtraction to set the cathode carrier is the maximum acceleration rate cap carrier rate, system overload control stepped addition and subtraction. Advantageous effects of the invention are: by introducing hydrogen buffer tank to effectively prevent the anode gas less; By controlling the addition and subtraction of the carrier, reducing the voltage fluctuations, can effectively improve the life of the engine system.