Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent
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United States of America Patent
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Apr 23, 2002
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app pub date -
Mar 17, 2000
filing date -
Mar 17, 2000
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Abstract
A method and apparatus for controlling the operation of a 'lean-burn' internal combustion engine in cooperation with an emissions control device capable of alternatively storing and releasing an exhaust gas constituent, such as oxygen, when exposed to exhaust gases that are lean and rich of stoichiometry, respectively, determines an ability of the device only when the engine is operating at a relatively-low mass air flow rate.
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