US 11,891,961 B1
Gaseous fuel engine system and operating strategy for limiting crankcase fuel accumulation
Jaswinder Singh, Dunlap, IL (US); Eric Lee Schroeder, Germantown Hills, IL (US); Adam Joseph Clute, Lafayette, IN (US); and Aaron Scott Ness, Battle Ground, IN (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Aug. 3, 2022, as Appl. No. 17/879,978.
Int. Cl. F02D 19/02 (2006.01); F02D 41/30 (2006.01)
CPC F02D 19/021 (2013.01) [F02D 41/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a gaseous fuel engine system comprising:
monitoring at least one engine system parameter upon the basis of which a blowby amount of a gaseous fuel to a crankcase in a gaseous fuel engine varies;
conveying the gaseous fuel into a cylinder in the gaseous fuel engine for combustion;
controlling at least one of a delivery location, a delivery timing, or in situ mixing of the gaseous fuel with air, based on the monitored at least one engine system parameter; and
limiting the blowby amount of the gaseous fuel that blows by a piston in the gaseous fuel engine based on the controlling at least one of a delivery location, a delivery timing, or in situ mixing of the gaseous fuel with air, such that crankcase accumulation of the gaseous fuel is maintained below a flammability limit.