P. Folęga

State of Stress Analysis for Structural Solutions of Combustion Engine Piston Pins

This paper addresses a study undertaken to develop spatial numerical models of a piston, a piston pin and a connecting rod with reference to real components of a combustion engine crank system. The numerical studies conducted comprised an analysis of how the mechanical strength of piston pins was influenced depending on the change in their inner shape. For the purposes of calculations, various scenarios of shape modification were proposed for piston pins currently in use, enabling their weight to be reduced.

Concept of Engine Vibration Monitoring System

The paper presents concept of engine vibration monitoring system dedicated for all kind means of transport. Based on nature of vibration phenomena the scope of the possibilities of usage of vibration become very wide. The procedure of vibration measurements allow to conduct constant registration without invasion into construction into mechanism. These are non-destructive methods. Due to all these advantages and very difficult environment of engine in means of transport the application of vibration methods for engine monitoring system become very popular. The paper presents some exemplary results of vibration registration on the block of the engine.

Identification of Engine Operation States Using Advanced Signal Analysis Methods

The article provides a discussion concerning the potential for applying advanced methods of vibroacoustic signal processing for the purposes of identification of a combustion engine state. It contains example results of vibration measurements on the passenger car combustion engine in three directions. The research was conducted on stopping vehicle, for different pre-set values of the engine rotational speed. The results of preliminary tests focused on the potential use in the diagnostics of engine operation.