| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely control supply flow of air to a fuel cell by using an inexpensive air flow meter. <P>SOLUTION: By operating an air compressor in a state of closing a shut valve, an indication value of the air flow meter, and an indication value of pressure sensor are recorded during a fixed time established in advance at that time. By integrating the indication value of the air flow meter in a fixed time, a first calculated air flow is computed based on the indication value of the air flow meter. Based on a system volume from the air compressor to the shut valve, a value of increasing air pressure in the system volume calculated by changes of the indication value of the pressure sensor and the atmospheric pressure, a calculated second air flow is computed. By obtaining a ratio of the calculated first air flow against the calculated second air flow, a correction coefficient corresponding to an error of the indication value of the air flow meter is acquired. <P>COPYRIGHT: (C)2011,JPO&INPIT |
