METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for operating an internal combustion engine having at least one injection valve (10) which, in the region of an associated cylinder of the internal combustion engine, is mechanically coupled to the cylinder head (30) and which has a piezoelectric element (15), in particular a piezoelectric actuator. According to the invention, an electrical operating variable of the piezoelectric element (15) is evaluated in order to draw a conclusion regarding a deformation of the cylinder head (30) and/or of the injection valve (10); a combustion chamber pressure (P) is derived from the deformation of the cylinder head (30) and/or of the injection valve (10); and the derived combustion chamber pressure (P) is used for checking the plausibility of combustion chamber pressure values which are obtained by means of a further method and/or further sensors.