| 摘要 |
A system and method for controlling the speed of a compressor that provides air to the cathode side of a fuel cell stack in the event that a cathode by-pass valve fails. If a by-pass valve failure is detected, a failure algorithm first disengages the normal flow and pressure algorithms used to control the airflow to the cathode side of the stack. Next, the failure algorithm opens the cathode exhaust gas valve to its fully opened position. Then, in response to a stack power request, the compressor control will be put in an open-loop control where a look-up table is used to provide a particular compressor speed for a power request. An airflow meter will measure the airflow to the stack, and the stack current will be limited based on that airflow.
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