Patent ID: 9010300
Filing Date: 2015-04-21
Classification: F02B,F02D

Abstract:
1. An internal combustion engine comprising: a first set of cylinders in a first bank of the internal combustion engine; a second set of cylinders in a second bank of the internal combustion engine; a flat-plane crankshaft coupled to the first set of cylinders and the second set of cylinders; a bank angle between the first bank and second bank that is adjusted from a 90 degree bank angle by a selected angle to reduce an amplitude of second order torque variations when the internal combustion engine is operating in a fuel saving mode; a fuel supply line and an air supply line for each cylinder of the first and second sets of cylinders; a supplemental gas supply line for each cylinder of the first set of cylinders; and a controller communicably coupled to the supplemental gas supply line, wherein the controller is configured to perform a method, the method comprising: stopping a fuel flow into the first set of cylinders, the stopping causing a deactivation of the first set of cylinders supply valves to stop combustion in the first set of cylinders; continuing injection of fuel into the second set of cylinders to provide power while the first set of cylinders are deactivated; and injecting gas, via the supplemental gas supply lines, into the first set of cylinders when each of the first set of cylinders are at bottom dead center, the injected gas increasing a cylinder pressure in each of the first set of the plurality of cylinders that reduces an amplitude of second order torque variations during operation of the engine while the first set of the plurality of cylinders are deactivated.