The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2025
Filed:
Apr. 21, 2023
Caterpillar Inc., Peoria, IL (US);
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;
Radoslav B. Ivanov, Dupnitsa, BG;
Caterpillar Inc., Peoria, IL (US);
Abstract
Operating a hybrid power system for a machine includes combusting a direct injected gaseous hydrogen fuel in an engine operating an electrical generator, and increasing a load demand of the hybrid power system. Operating the hybrid power system further includes operating an electrical-assist compressor to supply an increased airflow into the engine based on an increased engine power demand to satisfy the increased load demand. Air-fuel equivalence ratio of the engine (so-called 'lambda') is maintained at a ratio of about 2 or greater to limit NOx emissions, and between a hydrogen fuel misfire limit and a hydrogen fuel preignition limit. Related apparatus and control logic is also disclosed.