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Research regarding operation and wear process in the case of cylinder surface and compression piston-ring under the influence of other significant factors such as temperature, average engine speed, stroke and number of cycles facilitates at a specific time to improve the diagnosis process or to optimize designing and manufacturing outcomes. The objectives of the research paper are to analyze with software application the wear process and by multidisciplinary approach to develop methods for engine components evaluation through noninvasive procedure. Specific targets are a theoretical presentation of the scientific proposal for specific digital analyzing method in the case of a compression piston-ring from a thermal engine and an applied research conducted in the Automotive Software Laboratory at Technical University from Cluj-Napoca with the technical specs retrieved in the practical process. Result from applied research were collected and particularly studied and discussed to gain most significant ideas related to automotive components and processes improvement opportunities. There was also outlined a specific method for studying the mobile components from inside the internal combustion engine. Piston dynamics, piston ring vibrations and cylinder-liner deformations generate a complex thermo-dynamic environment in which wear process develops in specific trends that had to be properly understood. The wear factors of the piston-assembly are determining the specific conditions in operation and performing quality of the internal combustion engines. Wear evolution influences the economy of the engine operation due to service and stand-by sequences, and also important fuel efficiency.