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Apparatus and Method for Bypassing Sulfur Dioxide Around an Aftreatment Device in an Exhaust Gas Aftreatment System

Abstract: 

A lean sulfur trap and a rich sulfur trap are arranged to prevent the passage of sulfur-containing exhaust gases through a sulfur-sensitive component of an aftertreatment system. After a determined period of operation, the lean sulfur trap and rich sulfur trap are purged in sequential operations, during which time exhaust gas flow is diverted around the sulfur-sensitive component, and then restored after purging of the traps.

Patent Number: 
6,348,177
Date Of Issue: 
02/19/2002
Inventors: 

Gordon J. Bartley;Magdi Khair