Patent ID: 11884259
Assignee: NINGBO GEELY AUTOMOBILE RESEARCH & DEVELOPMENT CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 10:
11. A drive train for a hybrid electric or electric vehicle, the drive train comprising:
a stepped gear transmission having a plurality of driving gears and at least one mechanical synchroniser;
an electric traction motor; and
a transmission control unit,
wherein the transmission control unit is configured to:
calculate a first time period for performing the total rotational speed synchronisation by means of only the electric traction motor,
calculate a second time period for performing the total rotational speed synchronisation by means of only a mechanical synchroniser of the stepped gear transmission,
determine whether the first synchronisation time period exceeds the second synchronisation time period or if the first synchronisation time period exceeds the second synchronisation time period more than 25%, and
perform the synchronisation by means of only the electric traction motor if the first synchronisation time period does not exceed the second synchronisation time period or if the first synchronisation time period does not exceed the second synchronisation time period more than 25%.