Patent ID: 7962277
Filing Date: 2011-06-14
Classification: F02D

Abstract:
1. A method for operating an internal combustion engine, which comprises as least two cylinders, an induction tract and an exhaust-gas tract, which communicate with a combustion chamber of one of the cylinders depending on a switched position of at least one of a gas inlet valve and a gas exhaust valve, and which, for each of the cylinders, comprises at least one injection valve and a piston, with said piston being connected to a crankshaft of the internal combustion engine, the method comprising the steps of: determining whether one or more necessary diagnostic conditions for a diagnosis of uneven running of the internal combustion engine are currently present, if at least one of the necessary diagnostic conditions are currently present, determining whether the internal combustion engine is functioning fault-free with respect to uneven running by: if it is determined that the internal combustion engine is functioning fault-free with respect to uneven running: