Optimization Control of the Fuel Consumption Ratio for an Engine∼CVT∼ Load System using Decoupling Control Theory

Abstract

In order to study the optimization control for the fuel consumption ratio (be) of the engine∼continuously variable transmission (CVT)∼load system, a method employing consolidated control was attempted. This means that the throttle value angle (θ) of the engine and variable ratio of the CVT are controlled simultaneously under the conditions satisfying the desired speed (n_v) of the CVT output shaft. In this case, it is well known that some countermeasure must be taken against the interaction between θ and R_m to n_v. A countermeasure based on decoupling control theory was applied. Also, modelling of the objective system, which was necessary for the procedure of designing the control system, was carried out taking into account the nonlinearity and CVT actuator speed R_m. The investigation was carried out experimentally as well as theoretically, and a desirable be-result was obtained with an excellent n_v time response.