US 12,337,820 B2
Machine having hydrogen engine hybrid power system and control strategy for same
Robert M. McDavid, Dunlap, IL (US); Jonathan W. Anders, Peoria, IL (US); Bobby John, Peoria, IL (US); Timothy A. Bazyn, Chillicothe, IL (US); Youngjin Son, San Antonio, TX (US); Aaron W. Costall, London (GB); and Radoslav B. Ivanov, Dupnitsa (BG)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Apr. 21, 2023, as Appl. No. 18/304,746.
Prior Publication US 2024/0351573 A1, Oct. 24, 2024
Int. Cl. B60W 20/15 (2016.01); F02B 39/10 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01)
CPC B60W 20/15 (2016.01) [F02B 39/10 (2013.01); F02D 41/0027 (2013.01); F02D 41/1454 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of operating a hybrid power system in a machine comprising:
combusting a gaseous hydrogen fuel in a plurality of cylinders in an engine;
operating an electrical generator via the engine;
increasing a load demand of the hybrid power system;
increasing an engine power demand based on the increased load demand;
operating an electric-assist intake air compressor via an electric assist motor to supply an increased airflow into the engine based on the increased engine power demand;
increasing an amount of gaseous hydrogen fuel admitted into the engine for combustion based on the increased engine power demand;
increasing an engine power output based on the increased airflow and the increased amount of gaseous hydrogen fuel; and
satisfying only a portion of the increased load demand via the increased engine power output, so as to limit an emissions level of the engine below a desired emissions level.