SIMULATION AND ANALYSIS OF AN INTERNAL COMBUSTION ENGINE WITH VARIABLE COMPRESSION RATIO

One of the disadvantages of gasoline engines to diesel engines is their low efficiency.However, due to less pollution of gasoline engines, extensive activities are done in order to increase their efficiency. One of the methods considered in this context is the use of Variable Compression Ratio (VCR). The aim of this study is to collect and introduce the existing technolo gies presented for VCR engines.Also, one of the newest and most useful of these projects (MCE - 5) that has been designed by one of the research companies in European, and is currently at the experimental stage, simulated and analyzed in this paper and its p erformance is discussed in terms of the stress distribution.Stress analysis has been done using the commercial software package ABAQUS ™.Obtained stress distribution in maximum cylinder pressure indicates good performance of the proposed system.Using the r esulting stress distribution, the proposals to reduce the destructive stresses can be proposed, as an example has been observed and a solution is proposed to amend it