US 12,467,530 B2
Method and control device for operating a vehicle driveline
Johannes Glückler, Friedrichshafen (DE); Christian Mittelberger, Ravensburg (DE); Stefan Spühler, Friedrichshafen (DE); and Morten Scherpelz, Tettnang (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on Aug. 31, 2023, as Appl. No. 18/240,530.
Claims priority of application No. 10 2022 209 051.9 (DE), filed on Aug. 31, 2022.
Prior Publication US 2024/0068559 A1, Feb. 29, 2024
Int. Cl. F16H 61/02 (2006.01); F16H 59/14 (2006.01); F16H 59/78 (2006.01); F16H 61/04 (2006.01); F16H 59/36 (2006.01)
CPC F16H 61/0213 (2013.01) [F16H 59/14 (2013.01); F16H 59/78 (2013.01); F16H 61/0403 (2013.01); F16H 2059/148 (2013.01); F16H 2059/366 (2013.01); F16H 2061/0422 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for operating a powertrain of a vehicle, wherein the powertrain features a first electrical machine with first power electronics, a second electrical machine with a second power electronics, and a transmission connected between the electrical machines and an output, the method comprising:
executing a powershift, wherein one of the first electrical machine and the second electrical machine is used as a main driving machine, and wherein the other of the first electrical machine and the second electrical machine is used for tractive force support during the execution of the powershift;
determining that an actual temperature of at least one of the electrical machines and/or an actual temperature of at least one of the power electronics is greater than a temperature limit value, and/or when a target electric current flowing through at least one of the electrical machines and/or at least one of the power electronics is greater than a current limit value; and
adapting a powershift to be executed so as to limit heating of the respective electrical machine and/or the respective power electronics.