Exhaust gas purification method and exhaust gas purification apparatus
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United States of America Patent
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Sep 7, 2004
Grant Date -
Oct 24, 2002
app pub date -
Oct 11, 2001
filing date -
Feb 16, 2000
priority date (Note) -
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Abstract
A particulate filter (22) is arranged in an exhaust passage of an engine. When an amount of discharged particulate discharged from a combustion chamber (5) per unit time exceeds an amount of particulate removable by oxidation which can be removed by oxidation on the particulate filter (22) per unit time without emitting a luminous flame, at least one of the amount of discharged particulate and the amount of particulate removable by oxidation is controlled so that the amount of discharged particulate becomes smaller than the amount of particulate removable by oxidation, whereby the particulate in the exhaust gas can be continuously removed by oxidation on the particulate filter (22) without emitting a luminous flame.
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