Patent ID: 7878049

Claim:
A method of indicating a fault associated with a non-combustion chamber of an engine, comprising: monitoring a fluid intake pressure for the engine; maintaining a rolling buffer of monitored fluid intake pressure values for the engine; comparing a first average of a set of the most recent monitored fluid intake pressure values in the rolling buffer to a second average of a set of the oldest monitored fluid intake pressure values in the rolling buffer; setting a trigger if the difference between the first average and the second average exceeds an intake threshold value, wherein the trigger is set as a point in time that corresponds to the most recent monitored fluid intake pressure value; monitoring a pressure in a non-combustion chamber of the engine; and indicating, if the trigger is set, a fault associated with the non-combustion chamber based on a difference between a first non-combustion chamber pressure and a second non-combustion chamber pressure being below a chamber threshold value.