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Determination of an LNT Regeneration Condition Based on a NOx Storage Fraction in a 2.2L Direct Injection Diesel Engine
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 Title & Authors
Determination of an LNT Regeneration Condition Based on a NOx Storage Fraction in a 2.2L Direct Injection Diesel Engine
Chun, Bongsu; Lee, Jungwoo; Han, Manbae;
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This study was carried out to determine an optimal lean trap (LNT) regeneration condition based on a storage fraction. The LNT regeneration was performed by an in-cylinder post fuel injection method. A storage fraction is defined by the ratio of current cumulated amount in the LNT to the storage capacity: 0 means empty and 1 fully loaded. In this study five engine operating conditions were chosen to represent the New European Driving Cycle. With various storage fractions each engine operating condition, the LNT regeneration was executed and then conversion efficiency, additional fuel consumption, CO and THC slip, peak catalyst temperature were measured. The results showed that there exist an optimal condition to regenerate the LNT, eg. 1500 rpm 6 bar BMEP with below 0.7 storage fraction in this experimental constraint.
Lean trap;In-cylinder post fuel injection; storage fraction; conversion efficiency;
 Cited by
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