Patent ID: 9284894
Filing Date: 2016-03-15
CPC Classification: F02B,F02D

Claim Text:
1. A method for active fuel management in an engine having a plurality of cylinders, the method comprising: stopping a fuel flow into a first set of the plurality of cylinders, the stopping causing a deactivation of the first set of the plurality of cylinders; continuing injection of fuel into a second set of the plurality of cylinders to provide power while the first set of the plurality of cylinders are deactivated; and injecting gas into the first set of the plurality of cylinders when each of the first set of the plurality 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 first order torque variations during operation of the engine while the first set of the plurality of cylinders are deactivated.