The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2000
Filed:
Jun. 17, 1999
Applicant:
Inventors:
Assignees:
Dr. Ing. h.c.F. Porsche AG, Weissach, DE;
DaimlerChrysler AG, Stuttgart, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60274 ; 60286 ; 60295 ; 60303 ;
Abstract
A method for operating an NOx trap for an internal combustion engine includes measuring parameters that influence the delay between the metering of a regenerating agent and its becoming effective in regenerating the NOx trap. Such parameters include the fuel film on an intake wall and the quantity of oxygen bonded in the catalytic converters upstream of the NOx trap. Measuring these parameters helps determine the quantity of regenerating agent or the number of working cycles required for regeneration of the NOx trap.