Patent ID: 8579761

Claim:
A method of gearshift control of a motor vehicle having a drive train comprising a drive engine, which is built as a turbo-charged internal combustion engine, a startup clutch and a shift clutch, which is built as an automated friction clutch, and a transmission which is built as an automatic stepped transmission, so as to avoid torque deficiencies of the drive engine occurring during a build-up of load at an end of a tractive upshift, the method comprising the steps of: accelerating the drive engine up to either a boost threshold speed (n L — min ) or an engine speed (n M ) slightly above the boost threshold speed (n L — min ) after disengagement of a load gear, at the earliest, and at a start of the build-up of load after engagement of a target gear (n M =n L — min ; n M =n L — min +Δn M ), at the latest; and loading the drive engine, during the build-up of load, at a substantially constant engine speed (n M ≈n L — min ) beyond an intake torque (M S ) of the drive engine to nearly a full load torque (M VL (n L — min )) before ending a slipping operation of the friction clutch.