Dynamic modeling of the piston-conrod-crank system with hydrodynamic bearings / Modelo dinamico do sistema pistão-biela-manivela com mancais hidrodinamicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Due to the current commercial and technical requirements, the internal combustion engines must operate under higher pressures. It is also necessary to optimize the system operation and the shape of the components aiming at increasing the performance and weight reducing. For a better understanding of the dynamical behavior of a multi-cylinder engine, it is necessary to verify the kinematics and dynamics for just one cylinder, as considered in this work. The main focus of this work is the development of a mathematical model to determine the pressure distributions and the hydrodynamic bearing forces for one cylinder internal combustion engine. The dynamical model of the piston-conrod-crank system is presented and allows the calculation of the dynamic forces and clearances obtained from the combustion pressure for the main, big-end and small-end bearings. The mathematical model of the hydrodynamic bearing comes from the Reynolds equation and is solved by the Finite Element Method. The non-linear dynamic system is solved by the iterative Newton-Rhapson method for each time integration step

ASSUNTO(S)

mancais hidrostaticos reynolds number metodo numeros de newton-raphson method metodo dos elementos finitos hydrodynamics bearing reynolds crank system mechanism newton-raphson finite element method

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