Systems and methods for exhaust gas recirculation with a prechamber
AssigneeFord Global Technologies, LLC
InventorChris Paul Glugla
Life of this patent
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Abstract
Methods and systems are provided for operating a cylinder of an engine including a pre-chamber system. In one example, a method includes flowing gases from a pre-chamber to a cylinder of an engine prior to fueling the cylinder during a combustion cycle, adjusting a composition of the gases by adjusting at least one of an air injection amount to the pre-chamber and a fuel injection amount to the pre-chamber, and igniting an air-fuel mixture in the cylinder via a pre-chamber ignition event, the air-fuel mixture in the cylinder including the gas from the pre-chamber. In this way, combustion qualities in the cylinder may be adjusted in order to increase a performance and/or an efficiency of the cylinder.
Claims20
A method, comprising:
- determining an amount of gases purged from a pre-chamber to a cylinder based on a pressure difference between the pre-chamber and the cylinder during purging;
- and
- adjusting fueling to the cylinder based on the amount of gases purged from the pre-chamber to the cylinder.
A method, comprising:
- during a single compression stroke of a cylinder:
- performing a first combustion event in a pre-chamber coupled to the cylinder prior to injecting fuel into the cylinder;
- and
- performing a second combustion event in the pre-chamber after injecting the fuel into the cylinder.
A system, comprising:
- an engine including a cylinder, the cylinder including a pre-chamber of a pre-chamber ignition system;
- and
- a controller storing executable instructions in non-transitory memory that, when executed, cause the controller to:
- during a first operating mode, adjust fueling to the cylinder based on an amount and a composition of gases purged to the cylinder from the pre-chamber and a desired air-fuel ratio of the cylinder;
- and
- during a second operating mode, adjust the amount and the composition of the gases purged to the cylinder from the pre-chamber based on the desired air-fuel ratio of the cylinder.
Dependencies are inferred from the claim text.