Diagnostic system for valve actuation mechanism
AssigneeGM Global Technology Operations LLC
InventorsDonovan L. Dibble, Kenneth J. Cinpinski, Matthew A. Wiles, Vimesh M. Patel
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Abstract
A diagnostic system for an engine includes a pressure monitoring module that determines a plurality of first average pressure values and a plurality of second average pressure values of a fluid supply provided to a camshaft phaser. A diagnostic module identifies one of a plurality of cylinders associated with a failed variable valve lift mechanism based on the first and the second average pressure values. Each of the first and the second average pressure values respectively correspond to each of the plurality of cylinders.
Claims20
A diagnostic system for an engine, comprising:
- a pressure monitoring module that determines a plurality of first average pressure values and a plurality of second average pressure values of a fluid supply provided to a camshaft phaser;
- and
- a diagnostic module that identifies one of a plurality of cylinders associated with a failed variable valve lift mechanism based on said first and said second average pressure values;
- wherein each of said first and said second average pressure values respectively correspond to each of said plurality of cylinders.
A diagnostic method for an engine, comprising:
- determining a plurality of first average pressure values and a plurality of second average pressure values of a fluid supply provided to a camshaft phaser;
- and
- identifying one of a plurality of cylinders associated with a failed variable valve lift mechanism based on said first and said second average pressure values;
- wherein each of said first and said second average pressure values respectively correspond to each of said plurality of cylinders.
Dependencies are inferred from the claim text.