US 11,738,739 B2
Method and system to control torque distribution
Juliette Utbult, Gothenburg (SE); Derong Yang, Gothenburg (SE); Mats Jonasson, Gothenburg (SE); and Bengt Jacobson, Gothenburg (SE)
Assigned to Volvo Car Corporation, Gothenburg (SE)
Filed by Volvo Car Corporation, Gothenburg (SE)
Filed on Mar. 16, 2021, as Appl. No. 17/203,151.
Claims priority of application No. 20164034 (EP), filed on Mar. 18, 2020.
Prior Publication US 2021/0291808 A1, Sep. 23, 2021
Int. Cl. B60W 30/02 (2012.01); B60W 10/08 (2006.01); B60W 30/182 (2020.01); B60W 40/068 (2012.01); B60W 40/101 (2012.01); B60W 40/109 (2012.01)
CPC B60W 30/02 (2013.01) [B60W 10/08 (2013.01); B60W 30/182 (2013.01); B60W 40/068 (2013.01); B60W 40/101 (2013.01); B60W 40/109 (2013.01); B60W 2520/125 (2013.01); B60W 2520/26 (2013.01); B60W 2520/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method to control torque distribution among a plurality of electric machines connected to wheels of a vehicle during operation, the computer-implemented method comprising:
determining, by a system operatively coupled to a processor, a total torque requested based on a function of a longitudinal force request, an average loaded radius of the wheels, and a gear ratio;
in response to the total torque requested:
obtaining, by the system, a most energy efficient torque distribution mode of a group of torque distribution modes by using a loss model or loss map;
evaluating, by the system, a current driving situation of the vehicle;
determining, by the system, whether a mode switch from a current torque distribution mode of the group of torque distribution modes to the most energy efficient torque distribution mode is allowed based on the current driving situation;
performing, by the system, the mode switch from the current torque distribution mode to the most energy efficient torque distribution mode, in response to a result of the determining indicating that the mode switch is allowed; and
preventing, by the system, the mode switch from the current torque distribution mode to the most energy efficient torque distribution mode, in response to the result of the determining indicating that the mode switch is not allowed.