Implementação do controle de câmbio CVT: obtenção do máximo torque aplicando desenvolvimento baseado em modelos.

Abstract

This project is a result of a Senior Design Project held at the Department of Electrical Engineering at the Federal University of Campina Grande. It is the implementation of a vehicle control module that commands a CVT transmission system, using the development method Model-Based Design with a V-Cycle Procedure. This work carries great value to the Academic Unit covering a different theme from the usually approached, allied to its vision that meets one of the latest emergency in the automotive market. Two PD controllers were used in the Ratio Control strategy, therefore allowing the engine to operate at constant rotational speed and to work at the point of maximum torque whenever the control is engaged. The maximum slack found on the belt during controller’s actuation was 0.02% and the maximum stress was 0.1%. With this proposed control strategy, it was analyzed the convergence to the reference value of the transmission ratio required by the driver. The module was designed to a generic processor as target, consisting of 130 Kb of code.