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The application of finite element method (FEM) is widespread used to structural analysis. However the prescription or the consideration of a porous material parameter is still challenging. Thus, this work proposes a methodology applied to the finite element method considering a value of porosity. The goal is evaluate the structural behavior considering prescription of material porosity for 03 (three) loading conditions: analysis of natural frequencies extraction; analysis for concentrated load; analysis for inertial loading. Also is presented a comparison between different mesh refinement (size of element), and damaged elasticity modulus.

In this work the explicit finite elements method (FEM) was used to verify the technical feasibility of a passenger car cylinder head valve seats insertion process, under interference, at ambient temperature. In current production process, valve seat rings nitrogen chilling is used to make rings penetration easier at the cylinder head. The proposed valve seats insertion process eliminates nitrogen chilling, maintaining current processes speed and force parameters. A new valve seat external profile was used to reduce stress during insertion process. With the ring chilling removal, tensions and strains on the head and rings tend to be more critical. This simulation's main objective is to evaluate the proposed cylinder head valves seats insertion production process effectiveness. This will allow forecasting and solving productive process problems before its implementation, and foreseeing final product quality.

The components attached to the crankshaft of an internal combustion engine are under variable cyclic loads due to the engine cycle, combustion forces and pistons and conrods reciprocating movements, and the description of the forces is important to the right development of rotating components. The multi-body method is largely used in the automotive industry to obtain loads where dynamic effects are involved. The high costs and difficulty involved in obtaining experimental data of this kind of loads are the main reason of using this method. This way, the multi-body method is an important tool in the project of rotating components. The objective of this work is to show a calculation methodology using the multi-body method to obtain the stresses on a diesel engine radiator fan bracket under the crankshaft torsional vibration and other acting loads.

The need of mass reduction of automotive engines, aiming at greater performance of the vehicle and cost reductions, demands the research for optimized forms of all its components. The mass minimization of all parts of the engine is not limited only to the optimization of the mechanical project of the part in itself. A part with less weight or volume, saves used material, makes it possible to increase the part production, it facilitates transportation, and, therefore, allows reducing the final cost of the part throughout all its productive chain. In this work the method of Topological Optimization (TO) was applied to project a new geometry, using cast iron, for the alternator and air conditioner compressor bracket of an automotive engine, originally in aluminum. Two geometries had been proposed: one where it is considered manufacture process and another one where it is not considered. The last one was used as step for the optimization of final geometry.

The proposed paper aims to present a three-dimensional transient CFD (Computational Fluid Dynamics) analysis of the flow inside an automotive intake manifold conducted by SMARTtech Fluidos for FPT - Powertrain Technologies (site at Betim, Brazil). The more important goals of the study are the determination of pressure distribution on each of the four runners during four cycles of operation and the analysis of flow uniformity (characterized by velocity distribution) at the outlet surface of the intake runners. Three different plenum geometries were tested and a comparison among them was conducted in order to verify which one presents the best performance. Transient simulations have been performed in order to take into account the sequential opening/closing of intake engine valves during the engine firing sequence.