Agradecimentos: This work was conducted during scholarships supported by the Brazilian Federal Agency for Support and Evaluation ofGraduate Education (CAPES), National Council for Scienti?c and Technological Development (CNPq), Federal Universityof Technology - Paraná (UTFPR) and University of Campinas (UNICAMP) Ver menos

In the present work, the Adaptive-Weight Genetic Algorithm was employed in order to determine the gear shifting strategies that allow an automobile to work in the best compromise among fuel consumption, engine emissions, and vehicle performance. For the assessment of each of the three objective functions, a simulation model based on engine data and on the well-established equations of the longitudinal dynamics was developed. The driving cycle chosen for the calculations was the FTP-75, which takes into account both cold and hot starts, meaning that the transient operation during the warm-up of the catalyst is also considered Ver menos