Simulation of engine misfire based on virtual prototyping and vibration signal analysis

Virtual prototyping model for engine dynamics analysis is established on AVL EXCITE platform. The situations of engine with one cylinder misfire, adjacent two cylinders misfire and interval two cylinders misfire are simulated. Vibration signals on engine block or cylinder head can be calculated to analyze the variation tendency between the normal condition and misfire conditions. Experimental test and analysis is performed on the same structural engine, results of experiment and simulation are coincident. Using virtual prototyping technology for engine fault simulation would have a good guidance role for fault feature extraction and fault diagnosis.