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:
May. 27, 2003
Filed:
Aug. 09, 2001
Applicant:
Inventors:
Ngoc-Hoa Huynh, Leonberg, DE;
Lorenz Salzer, Rutesheim, DE;
Peter Gerl, Esslingen, DE;
Alf Degen, Meinersen, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 ;
U.S. Cl.
CPC ...
F01N 3/00 ;
Abstract
A method and an arrangement are provided for reducing warm-up emissions in the exhaust system of a direct-injection internal-combustion engine. The method includes the steps of adjusting a lean air/fuel mixture for the engine-related combustion; implementing a late injection into the exhaust gas during the exhaust cycle of the internal-combustion engine, so that the exhaust gas contains an essentially stoichiometric air/fuel mixture; and igniting the stoichiometric air/fuel mixture contained in the exhaust gas in the proximity of a catalyst device for heating up the catalyst device.