Patent ID: 8272356

Claim:
An internal combustion engine system with a split-engine, comprising: an engine block; a first engine module housed in the engine block, said first engine module comprised of a first plurality of combustion cylinders linked to a first crankshaft for rotationally driving the first crankshaft, wherein the first plurality of combustion cylinders are configured to operate at a compression ratio equal to or greater than 13:1; a second engine module housed in the engine block, said second engine module comprised of a second plurality of combustion cylinders linked to a second crankshaft for rotationally driving the second crankshaft, wherein the second plurality of combustion cylinders are configured to operate at a compression ratio less than or equal to 12:1; a fuel tank, fluidly connected to both the first engine module and the second engine module, for providing fuel for combustion in the first or second plurality of combustion cylinders.