Method for reducing emissions from a hydrogen combustion engine
AssigneesHyundai Motor Company, Kia Corporation
InventorsSung Mu Choi, Ji Ho Cho, Hyung Jun Kim
Life of this patent
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Abstract
A method for reducing emissions from a hydrogen combustion engine includes: a first step in which a controller obtains an H2O concentration at a front end of an SCR catalyst, an SCR temperature, and a NO2/NOx ratio derived from a DOC; a second step in which the controller calculates a predicted NOx purification rate based on the H2O concentration, the SCR temperature, and the NO2/NOx ratio; and a third step in which the controller calculates a urea dosing amount that aligns with the predicted NOx purification rate and performs control to dose the calculated dosing amount of urea.
Claims9
A method for reducing emissions from a hydrogen combustion engine, the method comprising:
- a first step in which a controller obtains an H2O concentration at a front end of a selective catalytic reduction (SCR) catalyst, an SCR temperature, and a NO2/NOx ratio derived from a diesel oxidation catalyst (DOC);
- a second step in which the controller calculates a predicted NOx purification rate based on the H2O concentration, the SCR temperature, and the NO2/NOx ratio;
- and
- a third step in which the controller calculates a urea dosing amount that aligns with the predicted NOx purification rate and performs control to dose the calculated dosing amount of urea.
Dependencies are inferred from the claim text.