Compression-ignition engine configuration for reducing pollutants and method and system thereof
AssigneeGeneral Electric Company
InventorsManoj Gokhale, Chenna Boyapati
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Abstract
In accordance with one aspect of the present technique, a method of reducing pollutant emissions from a compression-ignition engine is provided. The method includes adjusting timing of fuel injection into a combustion chamber of a piston-cylinder assembly of the compression-ignition engine. The method of adjusting timing of fuel injection includes indexing a drive mechanism intercoupling a camshaft to a crankshaft by at least one tooth away from a standard position. The method of adjusting timing of fuel injection further includes adjusting a pre-stroke of a plunger of a fuel injector assembly.
Claims22
A method of reducing pollutant emissions from a compression-ignition engine, the method comprising:
- adjusting timing of fuel injection into a combustion chamber of a piston-cylinder assembly of the compression-ignition engine, comprising:
- indexing a drive mechanism intercoupling a camshaft to a crankshaft by at least one tooth away from a standard position;
- and
- adjusting a pre-stroke of a plunger of a fuel injector assembly.
A method of operating a compression-ignition engine, the method comprising:
- rotating a crankshaft in response to movement of a piston forced to move by combustion in a chamber of a piston-cylinder assembly of the compression-ignition engine;
- rotating first and second drive elements of a drive mechanism intercoupling the crankshaft to a camshaft, wherein the first and second drive elements are offset by at least one tooth relative to a standard configuration;
- and
- moving an exhaust valve in response to movement of the camshaft, wherein movement of the exhaust valve is shifted based on the offset of the first and second drive elements.
A compression-ignition engine configured to reduce pollutant emissions, comprising:
- a drive mechanism intercoupling a camshaft and a crankshaft in a configuration retarded by at least one tooth, away from a standard position, wherein the drive mechanism comprises a gear drive, a chain and sprocket drive or a timing belt drive;
- and
- a fuel injector assembly configured to retard the timing of fuel injection into a piston-cylinder assembly of the compression-ignition engine.
A vehicle, comprising:
- a compression-ignition engine, comprising:
- a camshaft having a cam gear, wherein the cam gear is coupled to a crank gear and the cam gear is indexed relative to the crank gear by at least one tooth away from a standard position to retard a timing of fuel injection into a piston-cylinder assembly of the compression-ignition engine.
Dependencies are inferred from the claim text.