Method to diagnose a fault in a fuel injection system of an internal combustion engine
AssigneeGM Global Technology Operations LLC
InventorsMarco Girotto, Tommaso De Fazio, Michele Bastianelli
Life of this patent
Estimating the term…
Abstract
A method is provided to diagnose a fault in a fuel injection system of an internal combustion engine. The method includes, but is not limited to commanding an injection pulse for injecting a test quantity of fuel into an engine cylinder, determining the torque released to an engine crankshaft due to the injection pulse, calculating the difference between this released torque and an expected value for the torque, and of detecting a fault in the fuel injection system if the difference exceeds a threshold.
Claims16
A method of diagnosing a fault in a fuel injection system of an internal combustion engine, comprising:
- commanding an injection pulse for injecting a test quantity of fuel into a cylinder of the internal combustion engine;
- determining a torque released to a crankshaft of the internal combustion engine due to a combustion of said test quantity of fuel;
- calculating a difference between the torque and an expected torque value;
- and
- diagnosing the fault if said difference exceeds a threshold value.
A computer readable medium embodying a computer program product, said computer program product comprising:
- a diagnostic program for diagnosing a fault in a fuel injection system of an internal combustion engine, the diagnostic program configured to:
- command an injection pulse for injecting a test quantity of fuel into a cylinder of the internal combustion engine;
- determine a torque released to a crankshaft of the internal combustion engine due to a combustion of said test quantity of fuel;
- calculate a difference between the torque and an expected torque value;
- and
- diagnose the fault if said difference exceeds a threshold value.
Dependencies are inferred from the claim text.