US 11,731,499 B2
Drive train for a motor vehicle, in particular for a car, and method for operating such a drive train
Andreas Hoesl, Munich (DE); and Holger Jeebe, Forstinning (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/45,335
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Apr. 26, 2019, PCT No. PCT/EP2019/060827
§ 371(c)(1), (2) Date Oct. 5, 2020,
PCT Pub. No. WO2019/228720, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 10 2018 208 425.5 (DE), filed on May 28, 2018.
Prior Publication US 2021/0023929 A1, Jan. 28, 2021
Int. Cl. B60K 6/26 (2007.10); B60W 20/19 (2016.01); B60K 6/48 (2007.10); B60W 10/06 (2006.01); B60W 10/08 (2006.01)
CPC B60K 6/26 (2013.01) [B60K 6/48 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 20/19 (2016.01); B60W 2720/106 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A drive train for a motor vehicle, comprising:
at least one output shaft for providing torques for driving the motor vehicle;
an internal combustion engine which has a full-load curve and by which the motor vehicle is able to be driven via the output shaft; and
at least one electric machine, which has an electric operating voltage of at most 60 volts and which supports the internal combustion engine when driving the motor vehicle, is configured for driving the output shaft, and wherein the at least one electric machine comprises a stator and a rotor, and wherein the rotor is rotatable about a rotation axis relative to the stator which is disposed so as to be coaxial with the output shaft,
wherein:
the drive train has at least one operating state in which the electric machine supports the internal combustion engine when driving the motor vehicle in at least one rotational speed range of the internal combustion engine such that a torque provided by the output shaft exceeds a full-load curve and undershoots a maximum torque of the full-load curve; and
the drive train has at least one second operating state in which the electric machine supports the internal combustion engine when driving the motor vehicle such that a torque provided by the output shaft exceeds the full-load curve and the maximum torque of the full-load curve.