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. 31, 2005
Filed:
Dec. 05, 2002
Jens Wagner, Stuttgart, DE;
Karsten Kroepke, Ludwigsburg, DE;
Andreas Kufferath, Markgroeningen, DE;
Jens Wagner, Stuttgart, DE;
Karsten Kroepke, Ludwigsburg, DE;
Andreas Kufferath, Markgroeningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The aim of the invention is to reduce exhaust emission during the staring phase of a direct-injection internal combustion engine. For this purpose, at least one first injection per working cycle takes place when the internal combustion engine is cold, especially during the starting and/or warm-up phase, thereby producing a substantially homogeneous, combustible fuel/air mixture () in the combustion chamber (). In the same working cycle at least one further injection is supposed to take place which produces a substantially rich fuel/air mixture () in the zone of the ignition device (). The lambda value of the fuel/air mixture () produced by the second injection in the zone of the ignition device () is smaller than the lambda value of the fuel/air mixture () present in the remaining combustion chamber.