US 12,325,410 B2
Energy efficient predictive power split for hybrid powertrains
Martin Herceg, Bratislava (SK); Matej Pcolka, Prague (CZ); Bohumil Hnilicka, Troubelice (CZ); Daniel Youssef, Brno (CZ); Kamil Dolinsky, Prague (CZ); Jaroslav Pekar, Pacov (CZ); and David Vosahlik, Prague (CZ)
Assigned to Garrett Transportation I Inc., Torrance, CA (US)
Filed by Garrett Transportation I Inc., Torrance, CA (US)
Filed on Oct. 19, 2022, as Appl. No. 17/969,181.
Prior Publication US 2024/0132047 A1, Apr. 25, 2024
Prior Publication US 2024/0227773 A9, Jul. 11, 2024
Int. Cl. B60W 20/12 (2016.01); B60W 20/13 (2016.01); B60W 40/06 (2012.01); B60W 40/105 (2012.01)
CPC B60W 20/12 (2016.01) [B60W 20/13 (2016.01); B60W 40/06 (2013.01); B60W 40/105 (2013.01); B60W 2554/80 (2020.02); B60W 2710/0666 (2013.01); B60W 2710/083 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of operating a hybrid engine comprising a first power source that is a battery and a second power source that is an engine using a fuel, the hybrid engine being operated according to a power split to determine power generated by the first power source and the second power source, in an ego vehicle, the method comprising:
obtaining preview information over a first preview window including data relating to an upcoming segment of road to be traveled by the ego vehicle;
calculating an ego vehicle speed reference, wherein calculating the ego vehicle speed reference further includes determining that a lead vehicle is present in the upcoming segment of road, and adjusting the ego vehicle speed reference if a minimum distance to the lead vehicle is predicted to occur;
calculating a transmission torque request based on the ego vehicle speed reference, using the data related to the upcoming segment of road;
determining a first predictive power split plan between the first power source and the second power source from the transmission torque request, wherein determining the first predictive power split plan comprises calculating an engine torque request by minimizing a cost function within a prediction window, the cost function comprising weighted factors for each of terminal state of charge of the battery, a calculated engine torque reference, and engine torque request changes, and wherein the calculated engine torque reference is calculated using total power minimization in a control window in which an engine speed derived from the speed reference is used to find an engine torque split between energy from the fuel and equivalent battery energy at a given engine speed; and
executing at least a first operation point in the first predictive power split plan to operate the hybrid engine in accordance with the first predictive power split plan and drive a driveshaft of the ego vehicle that is coupled the hybrid engine in accordance with the first predictive power split plan;
wherein the data relating to the upcoming segment of road includes one or more of curvature, slope, traffic, traffic laws, and/or traffic signals.