PROCESS FOR AUTOMATIC CONTROL OF CHANGES OF STATE OF A POWERTRAIN GROUP BY INTER-SYSTEM INFORMATION EXCHANGE

摘要

Method of automatic control of changes of state of a powertrain (GMP) composed of a heat engine coupled to an automatic transmission having at least one cut-off clutch between the engine and the wheels of a vehicle, by exchanges inter-system instructions between an engine computer (ECM) and a transmission computer (ATCU), with a view to exiting a normal travel mode by cutting the engine when approaching stop, or by opening the clutch with a view to entering a freewheeling mode of travel with the engine running, characterized in that the inter-system instructions exchanged include the performance of a shutdown of the engine, on the one hand in normal travel at high speed during when releasing the accelerator pedal with your foot on the brake, and secondly when coasting with the accelerator and brake pedals released.