US 12,442,339 B2
Electric drive system for a vehicle
Henry Todd Young, Erie, PA (US); Rekha Doddarangaiah Prasad, Warrendale, PA (US); David John Scott, Washington, IL (US); Timothy Robert Heller, Germantown Hills, IL (US); and Venkat Jayaraman, Columbus, IN (US)
Assigned to Transportation IP Holdings, LLC; Komatsu America Corp.; and Cummins Inc.
Filed by Transportation IP Holdings, LLC, Norwalk, CT (US); Komatsu America Corp., Chicago, IL (US); and Cummins Inc., Columbus, IN (US)
Filed on Jul. 28, 2022, as Appl. No. 17/876,070.
Claims priority of provisional application 63/228,418, filed on Aug. 2, 2021.
Prior Publication US 2023/0032197 A1, Feb. 2, 2023
Int. Cl. F02D 29/02 (2006.01)
CPC F02D 29/02 (2013.01) [F02D 2200/101 (2013.01); F02D 2200/701 (2013.01); F02D 2200/702 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
determining a headroom target for a drive system of a vehicle, the drive system including an engine;
determining whether a current speed of the engine can be decreased while the engine continues to provide a requested traction output of the drive system; and
responsive to determining that the current speed of the engine can be decreased, decreasing the current speed of the engine to a reduced speed while the engine maintains the headroom target determined by the drive system;
wherein the headroom target is a dynamically changing value.