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:
Feb. 10, 2026
Filed:
Dec. 17, 2021
Volvo Truck Corporation, Gothenburg, SE;
Jan Eismark, Gothenburg, SE;
Rickard Ehleskog, Hisings Backa, SE;
Tommy Simonsson, Stenungsund, SE;
Gustavo Hindi, Surte, SE;
VOLVO TRUCK CORPORATION, Gothenburg, SE;
Abstract
An internal combustion engine system includes an internal combustion engine for combustion of gaseous fuel and has a combustion chamber at least partially delimited by a cylinder; a reciprocating piston moveable within said cylinder between a bottom dead centre and a top dead centre, said reciprocating piston having a piston top end comprising a piston bowl intended to form part of the combustion chamber The piston bowl has a plurality of spaced-apart protrusions circumferentially distributed around a centre axis on a bottom section of the piston bowl, each one of the spaced-apart protrusions extending a substantial part in a radial direction towards the centre axis; a controllable fuel injector injects gaseous fuel with a low injection pressure into the combustion chamber and toward the piston bowl; and a controller controls the controllable fuel injector to inject at least one gaseous fuel jet towards the bottom section of the piston bowl during a fuel injection period occurring prior to an ignition event of the gaseous fuel.