Patent ID: 7979185

Claim:
A method of determining a motor vehicle mass, the method being executed in conjunction with a gearshift of an automated shift transmission from a current gear to a desired gear, wherein force parameters and movement parameters are determined partially before or partially after the gearshift and partially during the gearshift such and are used to determine a motor vehicle mass value, the method comprising the steps of: before the gearshift, determining a drive engine traction force related to drive wheels and identified as F_zug_vor; after the gearshift, determining another drive engine traction force related to the drive wheels and identified as F_zug_nach; before the gearshift, determining a longitudinal acceleration of the motor vehicle and identified as a_zug_vor; after the gearshift, determining another longitudinal acceleration of the motor vehicle and identified as a_zug_nach; during the gearshift, determining acceleration in a traction-force-free phase and identified as a_roll; calculating a first mass value for the beginning of the gearshift, identified as m_vor, with a formula:of: m — vor=F — zug — vor/ ( a — zug — vor−a _roll); and calculating a second mass value for the end of the gearshift, identified as m_nach, with a formula:of: m — nach=F — zug — nach /( a — zug — nach−a _roll).