Patent ID: 7007676

Claim:
A fuel system for an engine, comprising: a source of pressurized fuel; a rail configured to receive the pressurized fuel; a plurality of fuel injectors in parallel fluid communication with the rail; a sensor configured to sense a parameter of the pressurized fuel within the rail and to generate a signal corresponding to the value of the parameter; and a controller in communication with the engine, the source of pressurized fuel, and the sensor, the controller being configured to: generate a flow control offset value indicative of a difference between the value of the parameter and a desired value for the parameter; control operation of the source in response to the flow control offset value when the sensor is determined to be functioning properly; store the flow control offset value in a memory of the controller when the sensor is determined to be functioning properly and associate the stored flow control offset value with at least one operating condition of the engine; and control operation of the source in response to previously stored flow control offset values when the sensor is determined to be malfunctioning.