ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,347, issued on Oct. 14, was assigned to VOLVO TRUCK Corp. (Gothenburg, Sweden).

"Piston and an internal combustion engine system" was invented by Jan Eismark (Gothenburg, Sweden), Tommy Simonsson (Stenungsund, Sweden), Rickard Ehleskog (Hisings Backa, Sweden) and Gustavo Hindi (Surte, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A piston for an internal combustion engine operable on a gaseous fuel is provided. The piston has a piston top end comprising a piston bowl for receiving at least one gaseous fuel jet from a fuel injector of the ICE, said piston bowl having a bottom section and a circumferential side section extending in an axial di...