Modelo de acoplamento dinâmico–termodinâmico padrão a ar de tempo finito de adição de calor de motor Otto

Abstract

There are many ways of modeling Otto engines with different detail levels. The air-standard Otto cycle is extremely simple, but does not promote good accuracy; the air-fuel cycles are more complex, but their achievements are better caloric properties estimate for the mixture and therefore a small accuracy increase for the work done by the mixture. For the work done by the motor to be found, it is necessary to incorporate a dynamical modeling of the mechanism piston–rod–crankshaft–flywheel to a thermodynamical model. For that, this work proposes to extend the Finite Time Heat Addition Otto cycle model, that only drops the hypothesis of isochoric heat Addition from ideal cycle, so one can couple a dynamic model which treats the rod as a pair of concentrated of masses, tied by a rigid massless body, and the other components as rigid bodies and so, obtain instantaneous torque acting in the crankshaft, angular speed variation, motor power, as other characteristics.