Device for Calibrating Two Electric Motors Mounted on One Axle in Two-Axle Motor Vehicles

A device for calibrating two electric motors mounted on one axle in two-axle motor vehicles comprising:

• at least one electronic control unit, wherein while the vehicle is in motion the at least one control unit is configured to:
• check whether predefined conditions for a switchover from torque control to rotational speed control are met, and if met:
• switch to rotational speed control for a predefined period of time;
• and
• during the period of time in which rotational speed control is active:
• acquire and save the target torques of the two electric motors, and
• form a difference between the acquired target torques of the two electric motors, wherein
• a torque-dependent characteristic map with correction values is created on the basis of this difference, and
• the target torques are corrected by the correction values during torque control after rotational speed control has been deactivated.

A method for calibrating two electric motors mounted on one axle in two-axle motor vehicles having at least one electronic control unit, the method comprising:

• while the vehicle is in motion, checking whether predefined conditions for a switchover from torque control to rotational speed control are met, and if met:
• switching to rotational speed control for a predefined period of time,
• while the vehicle is in motion, and during the period of time in which rotational speed control is active:
• acquiring and saving the target torques;
• and
• forming a difference between the acquired target torques of the two electric motors, wherein
• a torque-dependent characteristic map with correction values is created on the basis of this difference, wherein the target torques are corrected by the correction values during torque control after rotational speed control has been deactivated.