Method and system for maintaining aftertreatment efficiency
AssigneeCaterpillar Inc.
InventorsMark Scaife, Trent Cleveland, Michael Lowe, Cornelius Opris, Evan Jacobson
Life of this patent
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Abstract
A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.
Claims20
A method of compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system, comprising:
- determining flow resistance values through the aftertreatment element;
- tracking minimum flow resistance values over time;
- correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption;
- and
- adjusting the predetermined values based on the tracked minimum flow resistance values over time.
A system for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system, comprising:
- at least one filter section within the aftertreatment element;
- a controller configured to:
- determine flow resistance values through the aftertreatment element;
- track minimum flow resistance values over time;
- correlate tracked minimum flow resistance values over time with a model of oil consumption rate that is based on predetermined values for model oil consumption;
- and
- adjust the predetermined values based on the tracked minimum flow resistance values over time.
A machine, comprising:
- an engine including an exhaust system;
- an aftertreatment element, including at least one filter section, in the exhaust system;
- a control system including a controller, the controller configured to:
- determine flow resistance values through the aftertreatment element;
- track minimum flow resistance values over time;
- correlate tracked minimum flow resistance value over time with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption;
- and
- adjust the predetermined values based on the tracked minimum flow resistance values over time.
Dependencies are inferred from the claim text.