Computations of an engine to analyze cylinder distortion

The aim of the research work presented here is to control the geometric dis tortions of engine cylinders, which involve both noise and oil consumption. The final goal is then to limit pollution from engines. The simulation dea ls initially with the cold stamping and crushing operations of a cylinder h ead gasket; based on using solid finite element models from the Abaqus comp uter code (version 5.3) for large deformation with plasticity and contact i ncluding friction. lit addition, experiments have been carried out to ident ify the plasticity rule for the materials used in order to simulate the cru shing of the cylinder head gasket under a given normal pressure representin g the clamping operation. The main difficulty of this work is to correlate the cylinder head gasket behaviour and cylinder distortions with the main f unction of the gasket ie. pressurized gas sealing: The cylinder head gasket is a complex multilayered structure made of three spot welded metal sheets . This assembly has;many holes of different shapes. Around the cylinder hol e on both outer layers of the gasket, there is a small size embossment to e nsure gas sealing between the engine block and cylinder head. This rib is n ot circular because of the combustion chamber shape.