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AssigneeGeneral Electric Company
InventorsW. Douglas Glenn, Eric Dillen, Shawn Gallagher, Prakash Bedapudi
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A diesel engine (E) has a combustion chamber (C), a piston (T) movable in the chamber, air intake and exhaust valves (IV, EV), and a nozzle (N) injecting fuel into the combustion chamber. By controlling hydraulic flow characteristics of an air-fuel mixture particulate matter (PM) produced by combustion of the air-fuel mixture in the chamber is reduced to a level which meets the Tier 2 requirements established by the Environmental Protection Agency (EPA) for the engine. This is further accomplished by increasing the injection pressure of the air and fuel injected into the chamber, changing the size and/or shape of the injector nozzle to increase a ratio of the air to fuel while fuel is injected into the chamber through the nozzle, increasing the compression ratio within the combustion chamber, lowering the manifold air temperature (MAT), and retarding the start of ignition injection (SOI) within the chamber. Besides reducing particulate matter to within the Tier 2 limits, the NOx produced by the engine is also maintained within the Tier 2 requirements, and the engine's fuel consumption is reduced.
A diesel engine (E) for a railroad locomotive comprising:
In a diesel engine (E) for a railroad locomotive, the engine having a combustion chamber (C), a piston (T) movable in the chamber, and an air intake valve (IV) and an exhaust valve (EV) whose openings and closings are timed to movement of the piston, the improvement comprising an injector (J) injecting fuel into the combustion chamber and having a nozzle (N) configuration whose hydraulic flow characteristics effectively reduce particulate matter (PM) produced by combustion of an air-fuel mixture in the chamber to a level which meets the Tier 2 requirements established by the Environmental Protection Agency (EPA) for locomotive diesel engines without having to treat the exhaust products from the engine.
In a diesel engine (E) for a railroad locomotive, the engine having a combustion chamber (C), a piston (T) movable in the chamber, an air intake valve (IV) and an exhaust valve (EV) whose openings and closings are timed to movement of the piston, and a nozzle (N) injecting fuel into the combustion chamber, a method of controlling hydraulic flow characteristics of the resulting air/fuel mixture to effectively reduce particulate matter (PM) produced by combustion of the air-fuel mixture in the chamber to a level which meets the Tier 2 requirements established by the Environmental Protection Agency (EPA) for locomotive diesel engines, while also maintaining other exhaust emission (NOx) levels within these requirements.
A method of controlling particulate matter (PM) and nitrogen oxide (NOx) emission levels within a diesel engine (E) for a railroad locomotive to levels which comply with EPA Tier 2 emission requirements, the engine having a combustion chamber (C), a piston (T) movable in the chamber, an air intake valve (IV) and an exhaust valve (EV) whose openings and closings are timed to movement of the piston, and a nozzle (N) injecting fuel into the combustion chamber, the method comprising:
Dependencies are inferred from the claim text.