a control method for a traction train for a vehicle and correspondingly controlled traction train

摘要

1 // 1 Summary "A control method for a traction train for a vehicle and correspondingly controlled traction train" The present invention relates to a control method for a traction train on a vehicle, said traction train comprising a mechanically connected motor to a gearbox and an electronic control unit (ecu), wherein said method comprises the steps of: allowing an extraordinary gear shift despite a first torque comparison indicating a Expected engine output torque demand above a first general limit for the permitted output torque associated with extraordinary gear shifting, provided that: A second torque comparison indicates that the expected engine output torque demand after the shift speed is within the limits of a second temporarily permitted motor output torque limit increased; an extraordinary gear shift criterion is performed (fulfilled) indicating a gear shift being allowed, said criterion being dependent on at least one parameter chosen from estimated fuel efficiency, engine efficiency, expected future torque demand, engine above the general engine torque limit and engine temperature.