US 12,409,827 B2
Axle torque grade assist
Adam J. Heisel, South Lyon, MI (US); Nicholas Michael Cococcetta, Davisburg, MI (US); Daniel Lee Baibak, White Lake, MI (US); Robert C. Gibson, Plymouth, MI (US); and Brian Kalinowski, Livonia, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Feb. 9, 2024, as Appl. No. 18/437,666.
Prior Publication US 2025/0256697 A1, Aug. 14, 2025
Int. Cl. B60W 10/16 (2012.01)
CPC B60W 10/16 (2013.01) [B60W 2520/10 (2013.01); B60W 2540/10 (2013.01); B60W 2552/15 (2020.02)] 20 Claims
OG exemplary drawing
 
1. A method of operating a vehicle, comprising:
measuring a road grade of a road section being traversed by the vehicle using a road grade sensor located on the vehicle;
determining an axle torque upper limit for a motor of the vehicle based on the road grade, a vehicle speed and a power flow direction of the vehicle, wherein the axle torque upper limit increases as the road grade increases when the vehicle is moving uphill in forward gear and increases as the road grade decreases when the vehicle is moving uphill in reverse gear;
determining an axle torque request based on the vehicle speed and a pedal position;
determining a clipped axle torque request from the axle torque request and the axle torque upper limit; and
controlling the vehicle by implementing the clipped axle torque request at the vehicle.