Vented pre-chamber assembly for an engine
AssigneeCaterpillar Inc.
InventorAndrew Loetz
Life of this patent
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Abstract
A prechamber assembly for a cylinder of a combustion engine is disclosed in which a plurality of ports placing a prechamber volume in fluid communication with the cylinder. A non-actuated, fixed orifice extends between the prechamber volume and a passageway formed in the prechamber assembly to permit combustion gases in the prechamber volume to enter the passageway. The passageway is configured to vent combustion gases therein out of the body. The orifice may reduce NOx emissions produced in the prechamber volume.
Claims20
A prechamber assembly for a cylinder of a combustion engine, comprising:
- a body defining a prechamber volume at one end of the body;
- a plurality of ports formed in the body near the one end, said ports placing the prechamber volume in fluid communication with the cylinder;
- a non-actuated, fixed orifice formed in the body and extending between the prechamber volume and a passageway formed in the body to permit combustion gases in the prechamber volume to enter the passageway, wherein the passageway is configured to vent combustion gases therein out of the body.
A combustion engine including a cylinder, the cylinder having a corresponding combustion prechamber associated therewith, the engine comprising:
- a body defining a combustion prechamber volume;
- a plurality of ports formed in the body, said ports placing the combustion prechamber volume in fluid communication with the cylinder;
- a non-actuated, fixed orifice formed in the body and extending between the prechamber volume and a passageway formed in the body to permit combustion gases in the prechamber volume to enter the passageway, wherein the passageway is configured to vent combustion gases therein out of the body.
A method for reducing emissions from an engine, the engine including a cylinder, the method comprising:
- providing a prechamber volume in fluid communication with the cylinder via a plurality of ports;
- providing a non-actuated, fixed orifice extending between the prechamber volume and a passageway to permit combustion gases in the prechamber volume to enter the passageway, wherein the passageway is configured to vent combustion gases therein out to one of an exhaust manifold or stack, an intake manifold, or an emission reduction system.
Dependencies are inferred from the claim text.