Patent Number: 6,293,094

Title: Method for operating an internal combustion engine and system and with sulfur-rich exhaust gas purification component and an internal combustion engine system operable therewith

Abstract: A method for operating an internal combustion engine system includes operating the internal combustion engine system in a desulfurization mode each time following a cold-start of the engine prior to the transition to a normal operating mode. The internal combustion engine system includes (1) an exhaust line; (2) a sulfur-rich exhaust purification component comprising at least two exhaust purification units connected in series in the exhaust line; and (3) a secondary air supply having separate branches for the sulfur-rich exhaust purification units.

Inventors: Schmidt; Jurgen (Muhlacker, DE), Tiefenbacher; Gerd (Esslingen, DE), Waltner; Anton (Weinstadt, DE)

Assignee: DaimlerChrysler AG

International Classification: F01N 3/08 (20060101); F01N 3/22 (20060101); F01N 3/30 (20060101); F02D 41/06 (20060101); F02D 41/02 (20060101); F01N 7/00 (20060101); F01N 7/02 (20060101); F01N 003/00 ()

Expiration Date: 09/25/2018