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Advanced engine management of individual cylinders for control of exhaust species

Patent ·
OSTI ID:985545
 [1];  [1];  [1];
  1. Knoxville, TN
+ Show Author Affiliations
A method and system controls engine-out exhaust species of a combustion engine having a plurality of cylinders. The method typically includes various combinations of steps such as controlling combustion parameters in individual cylinders, grouping the individual cylinders into a lean set and a rich set of one or more cylinders, combusting the lean set in a lean combustion parameter condition having a lean air:fuel equivalence ratio, combusting the rich set in a rich combustion parameter condition having a rich air:fuel equivalence ratio, and adjusting the lean set and the rich set of one or more cylinders to generate net-lean combustion. The exhaust species may have elevated concentrations of hydrogen and oxygen.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
ORO
Patent Number(s):
7,469,693
Application Number:
11/691,539
OSTI ID:
985545
Country of Publication:
United States
Language:
English

References (3)

An investigation of the thermal stability and sulphur tolerance of Ag/γ-Al2O3 catalysts for the SCR of NOx with hydrocarbons and hydrogen journal January 2007
Control of nitrogen oxide (NOx) emissions by selective catalytic reduction with hydrogen over hydrophobic catalysts journal November 1989
An Investigation of Promoter Effects in the Reduction of NO by H2 under Lean-Burn Conditions journal June 2002

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