Method for operating a drive train

摘要

A method of operating a drive train of a motor vehicle with a drive assembly which has a combustion engine and an automatic transmission with frictional shift elements positioned between the drive assembly and an output, namely for executing a traction upshift or a traction downshift in which at least one frictional shift element of the automatic transmission is engaged and at least one frictional shift element of the automatic transmission is disengaged. During execution of a traction upshift and at least, during the engagement procedure of a frictional shift element being engaged, reducing the torque provided by the combustion engine, and for executing a traction downshift at least during the lowering of the transferability of a frictional shift element being disengaged, reducing the torque provided by the combustion engine.

主权项

1. A method of operating a drive train of a motor vehicle comprising a drive assembly which has at least a combustion engine and an automatic transmission with frictional shift elements positioned between the drive assembly and an output, for executing a traction upshift in which at least one frictional shift element is engaged and at least one frictional shift element is disengaged, the method comprising the steps of:
engaging at least a first frictional shift element of the automatic transmission; disengaging at least a second frictional shift element of the automatic transmission; and simultaneously starting reducing torque provided by the combustion engine and starting engaging the first frictional shift element for executing the traction upshift.