Method of selection of rational characteristics of switching process of automatic vehicle two-flows transmission

In order to improve the work of automotive transmission the analysis of transients during switching gear is performed. The proposed algorithm of control gear process in double-flow transmission takes into account the different ways of managing the motor effect since the beginning of the gear, the duration of direct switching on the efficiency of acceleration of the vehicle. Different programs gear change at different values of both clutches are studied. Energy cost at switching is carried out within the framework of realization of the given vehicle program. For a single energy criterion is taken overall fuel consumption for the program motion, part of which is the fuel consumption of the equivalent work of skidding of frictional elements of both clutches when you switch power flow without breaking. Arguments are adduced that the process of the gear must not be too fast. We emphasize that there is no contradiction between optimal gear change laws in terms of fuel efficiency and dynamism. On the basis of the developed mathematical model software that allows you to explore the quality of transients when switching gears on a uniform energy selection is developed . Examples of using different methods to control the engine and double-flow transmission are given. Generally according to absolute fuel consumption, preference should be given to enhanced governance. New data are given; on their basis key areas for improvement in the management switch are identified.