Diesel exhaust fluid doser protection during cold ambient temperature conditions using cylinder cutout methods
AssigneeCummins Inc.
InventorsAnkit Raghunath Lad, Joshua Alan Lantz, Vaibhav J. Lawand, Nicholas R. Lewis, Ian W. McGiffen, Arulkumaran Muthukumarasamy
Life of this patent
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Abstract
A method includes determining that at least one diesel emissions fluid (DEF) doser of an exhaust aftertreatment system is likely frozen based on at least one of an ambient air temperature or a DEF source temperature; operating an engine in a cylinder cutout mode in response to the determination that the at least one DEF doser is likely frozen; and, discontinuing the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
Claims20
A method comprising:
- determining that at least one diesel emissions fluid (DEF) doser of an exhaust aftertreatment system is likely frozen based on at least one of an ambient air temperature or a DEF source temperature;
- in response to the determination that the at least one DEF doser is likely frozen, operating an engine in a cylinder cutout mode whereby a portion of a plurality of cylinders of the engine are fired, the portion of the plurality of cylinders being less than a total amount of cylinders of the plurality of cylinders;
- and
- discontinuing the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
A system comprising:
- a controller having a processing circuit having at least one memory device coupled to at least one processor, the controller structured to:
- determine that at least one diesel emissions fluid (DEF) doser of an exhaust aftertreatment system is likely frozen based on at least one of an ambient air temperature or a DEF source temperature;
- in response to the determination that the at least one DEF doser is likely frozen, operate an engine in a cylinder cutout mode whereby a portion of a plurality of cylinders of the engine are fired, the portion of the plurality of cylinders being less than a total amount of cylinders of the plurality of cylinders;
- and
- discontinue the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
A system comprising:
- an exhaust aftertreatment system comprising at least one diesel emissions fluid (DEF) doser;
- and
- a controller coupled to the exhaust aftertreatment system, the controller structured to:
- determine that the at least one DEF doser is likely frozen based on at least one of an ambient air temperature or a DEF source temperature;
- in response to the determination that the at least one DEF doser is likely frozen, operate the engine in a cylinder cutout mode whereby a portion of a plurality of cylinders of the engine are fired, the portion of the plurality of cylinders being less than a total amount of cylinders of the plurality of cylinders;
- and
- discontinue the cylinder cutout mode in response to determining that the at least one DEF doser is in a predefined condition.
Dependencies are inferred from the claim text.