US 11,850,949 B2
Device for calibrating two electric motors mounted on one axle in two-axle motor vehicles
Igor Gusyev, Munich (DE); and Boris Zuev, Munich (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/296,430
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Dec. 11, 2019, PCT No. PCT/EP2019/084536
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/143978, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 10 2019 100 324.5 (DE), filed on Jan. 8, 2019.
Prior Publication US 2022/0009356 A1, Jan. 13, 2022
Int. Cl. B60L 15/20 (2006.01)
CPC B60L 15/2036 (2013.01) [B60L 2220/42 (2013.01); B60L 2220/46 (2013.01); B60L 2240/12 (2013.01); B60L 2240/22 (2013.01); B60L 2240/24 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/461 (2013.01); B60L 2240/80 (2013.01); B60L 2260/42 (2013.01); B60L 2260/46 (2013.01)] 9 Claims
OG exemplary drawing
 
1. 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 perform the following, when predefined conditions for a switchover from torque control to rotational speed control are 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.