Patent ID: 11891961
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A gaseous fuel engine system comprising:
a gaseous fuel engine having a cylinder formed therein, and a crankcase in blowby communication with the cylinder;
a fuel system including a first gaseous fuel admission valve at a first fuel delivery location relative to the cylinder and a second gaseous fuel admission valve at a second fuel delivery location relative to the cylinder;
a fueling control unit in control communication with each of the first gaseous fuel admission valve and the second gaseous fuel admission valve and structured to:
monitor at least one engine system parameter upon the basis of which a blowby amount of a gaseous fuel from the cylinder to the crankcase varies; and
vary at least one of a fuel delivery split between the first fuel delivery location and the second fuel delivery location, a fuel delivery timing, or in situ mixing of the gaseous fuel with air in the cylinder, based on the monitored at least one engine system parameter, such that the blowby amount of the gaseous fuel that blows by a piston in the cylinder is limited to maintain crankcase accumulation of the gaseous fuel below a flammability limit.