Determinación de la variación de par motor, potencia, y pérdidas mecánicas en un motor de encendido provocado (MEP) en función de la presión atmosférica y temperatura ambiente a través del método de aceleración libre

Abstract

This work evaluates the changes of torque, power and mechanical losses of an ignition engine caused by the atmospheric pressure and environmental temperature using the free acceleration method. The analysis is performed from a height of 0 to 4000 m.o.s.l., every 250 m.o.s.l., across different Ecuadorian roads, taking into account as variables the pressure and the environmental temperature. The test has been doing in an engine which is equipped with CVV-T variable distribution system, four-cylinder, sequential multi-point injection system and 1400cc total displacement. For the development of the free acceleration method, it was established the moment of inertia as constant according to the values given obtained in dynamometric banks and using the test and error method the right moment of inertia needed for the research was calibrated. The values obtained in the research are compared with the values given by norm DIN70020, since it is the only one that can be applied to heights over 2000 m.o.s.l., resulting in a good approximation of power and torque values.