US 11,884,161 B2
Drivetrain with infinitely and electrically variable transmission capabilities
Jeffrey M. David, Cedar Park, TX (US); Travis J. Miller, Austin, TX (US); and Mark A. Davis, Opelika, AL (US)
Assigned to DANA HEAVY VEHICLE SYSTEMS GROUP, LLC, Maumee, OH (US)
Filed by Dana Heavy Vehicle Systems Group, LLC, Maumee, OH (US)
Filed on May 7, 2021, as Appl. No. 17/315,131.
Prior Publication US 2022/0355677 A1, Nov. 10, 2022
Int. Cl. B60L 15/20 (2006.01); B60K 17/12 (2006.01)
CPC B60L 15/2054 (2013.01) [B60K 17/12 (2013.01); B60L 15/2045 (2013.01); B60L 2240/12 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60Y 2400/73 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for an electric drive train of a vehicle, comprising:
operating a first motor of a set of motors in a torque control mode at a first speed;
operating a second motor of the set of motors in a speed control mode at a second speed, the second speed determined based on the first speed of the first motor;
summing a first torque generated by the first motor and a second torque generated by the second motor at an output node of a planetary gear set coupled to each of the first motor and the second motor, wherein the first motor and the second motor are coupled to the planetary gear set on opposite sides of the output node of the planetary gear set; and
operating the drive train with one of the first motor or the second motor at or near zero speed to reduce consumption of electrical energy and to reduce mechanical losses at one of the first motor and the second motor.