Process and device for engine and transmission control in a motor vehicle

US6360154B1 · kind B1 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Helmut Krenn · Unterföhring, DE
• Lothar Wolf · Munich, DE

Key dates

• Filing date: Aug 28, 2000
• Grant date: Mar 19, 2002
• Expiry date: Aug 28, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/50
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The invention concerns a process and a device 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. A desired transmission output torque is realized in that except during gear shifting of the stepped automatic transmission at least the gear ratio is detected, an engine torque default (M_IND_ACC) affecting the filling and/or an engine torque default (M_IND_GS) affecting the ignition are calculated from at least the gear ratio and the transmission output torque, and these dimensions are relayed to the engine control, which controls the filling and the ignition of the internal combustion engine taking into account at least these dimensions, and during gear shifting a synchronization engine torque default (M_IND_SYNC) is calculated which provides the engine torque required at the moment after gear shifting, the engine torque default (M_IND_ACC) affecting the filling during gear shifting is calculated from at least the synchronization engine torque default, the engine torque default (M_IND_GS, M_IND_GSZF) affecting the ignition is determined in s…