EXHAUST GAS PURIFICATION SYSTEM FOR DIESEL MOTORS
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United States of America Patent
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Issued Date -
May 24, 2001
app pub date -
May 1, 1998
filing date -
May 2, 1997
priority date (Note) -
Abandoned
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Abstract
An exhaust gas cleaning system for diesel motors made out of two diesel exhaust catalytic converters, arranged in sequence one behind the other, in the form of honeycomb bodies with parallel flow channels, whose wall surfaces are provided with a catalytically active coating. The first upstream catalytic converter possesses a cell density of less than 40 to 80 flow channels per cross-sectional square centimeter, while the cell density of the second catalytic converter situated downstream is larger than that of the first catalytic converter. Through this arrangement, it is possible to select a high cell density that, without connection in line with the low cell density catalytic converter would very quickly lead to a clogging by diesel particles.
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