Patent ID: 6360154
Filing Date: 2002-03-19
Classification: B60W,F02D,F16H,Y10T

Abstract:
Process for engine and transmission control in a motor vehicle with an internal combustion engine controlled by an engine control and a stepped automatic transmission controlled by a transmission control, comprising the steps of:presetting of a desired transmission output torque when and realization of the desired transmission output torque, wherein the step of realization , when gear shifting of the stepped automatic transmission is not occurring, includes the further steps of: detecting at least the gear ratio, calculating at least one of a first engine torque default (M_IND_ACC) affecting the filling and a second engine torque default (M_IND_GS) affecting the ignition from at least the gear ratio and the transmission output torque, and relaying said at least one of said calculated first and second torque default to the engine control which controls the filling and the ignition of the internal combustion engine, and wherein, during gear shifting, the step of realization includes the further steps of: calculating a synchronization engine torque default (M_IND_SYNC) which indicates the engine torque required at the moment after gear shifting, calculating the engine torque default (M_IND_ACC) affecting the filling from at least the synchronization torque default, determining the engine torque defaults (M_IND_GS, M_IND_GSZF) affecting the ignition in such a way that a default speed trace dependent on the ratio change in shifting the transmission can be set, determining the engine torque (M_IND) realizable by the engine, calculating a transmission output torque (M_AB_GETR), or a behavior of the transmission output torque (M_AB_GETR), taking into account the minimum of the synchronization engine torque default (M_IND_SYNC) and the engine torque (M_IND) realizable by the engine, and setting said output torque or said behavior of said output torque via a friction element of the transmission.