Reduced torque variation for engines with active fuel management

摘要

In one exemplary embodiment, a method for active fuel management in an engine having a plurality of cylinders is provided, the method including stopping a fuel flow into a first set of the plurality of cylinders, the stopping causing a deactivation of the first set of cylinders and continuing injection of fuel into a second set of the plurality of cylinders to provide power while the first set of cylinders are deactivated. The method also includes injecting gas into the first set of the plurality 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 cylinders that reduces an amplitude of first order torque variations during operation of the engine while the first set of cylinders are deactivated.

主权项

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.