Method and apparatus for suppressing diesel engine emissions
OwnerAaron Joseph Simon, Venkatraman Ananthakrishnan Iyer +2inventors
InventorsAaron Joseph Simon, Venkatraman Ananthakrishnan Iyer, Juan Carlos Alvarez, Samar Shaker Soliman
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Abstract
A method and apparatus for controlling fuel injection timing in a compression ignition engine is provided. The method includes monitoring a position of a piston reciprocating in a cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position and injecting a predetermined quantity of fuel into the cylinder when the piston is at least one of reciprocating from said TDC toward BDC during an intake stroke and at BDC reciprocating toward TDC during a compression stroke.
Claims35
A method of controlling fuel injection timing in a compression ignition engine including an engine block having at least one cylinder, said method comprising:
- monitoring a position of a piston reciprocating in each cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position;
- and
- injecting a pre-determined quantity of fuel into each cylinder when the piston is at least one of reciprocating from said TDC toward BDC during an intake stroke, and at BDC reciprocating toward TDC during a compression stroke.
A compression ignition engine comprising:
- an engine block comprising at least one cylinder;
- at least one cylinder head covering said at least one cylinder;
- a piston reciprocating in said at least one cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position;
- a combustion air inlet plenum in flow communication with said at least one cylinder;
- and
- a fuel injection system comprising at least one fuel injector, said system configured to inject fuel into said at least one cylinder when said piston is at least one of reciprocating from said TDC toward BDC during an intake stroke and at BDC reciprocating toward TDC during a compression stroke.
A railroad locomotive comprising:
- a compression ignition engine comprising an engine block comprising at least ten cylinders;
- at least one cylinder head covering said cylinders;
- a piston reciprocating in each said cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position;
- a combustion air inlet plenum in flow communication with said cylinder;
- and
- a fuel injection system comprising at least one fuel injector, said system configured to inject fuel into said cylinders at a crank angle of between about negative three hundred sixty degrees and about three hundred sixty degrees.
A railroad locomotive comprising:
- a compression ignition engine comprising an engine block comprising at least ten cylinders;
- at least one cylinder head covering said cylinders;
- a piston reciprocating in each said cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position;
- a combustion air inlet plenum in flow communication with said cylinder;
- and
- a fuel injection system that comprises at least one fuel injector mounted in said at least one cylinder head, said fuel injector comprises a nozzle that is at least partially within said cylinder, said system configured to inject said fuel at a first pre-determined piston position that corresponds to a crank angle of between about negative three hundred sixty degrees and about zero degrees., and inject a second quantity of fuel into said cylinder at a second pre-determined piston position that corresponds to a crank angle of between about negative forty five degrees and about twenty degrees, such that a fuel/air equivalence ratio of the fuel/air mixture in each said cylinder at ignition is between 0.10 and 0.85.
A railroad locomotive comprising:
- a compression ignition engine comprising an engine block comprising at least ten cylinders;
- at least one cylinder head covering said cylinders;
- a piston reciprocating in each said cylinder between a top dead center (TDC) position and a bottom dead center (BDC) position;
- a combustion air inlet plenum in flow communication with each said cylinder;
- and
- a fuel injection system comprising at least one fuel injector mounted in said combustion air inlet plenum, said fuel injector comprising a nozzle, said nozzle at least partially within said combustion air inlet plenum, said system configured to inject fuel into said cylinders at a crank angle of between about negative three hundred sixty degrees and about three hundred sixty degrees, such that a fuel/air equivalence ratio of a fuel/air mixture in said cylinder at ignition is between 0.10 and 0.85.
Dependencies are inferred from the claim text.