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:
Mar. 25, 2008
Filed:
Apr. 25, 2006
Gots Brachert, Stuttgart, DE;
Rüdiger Herweg, Esslingen, DE;
Matthias Pfau, Ludwigsburg, DE;
Jochen Schäflein, Stuttgart, DE;
Hans-jürgen Weimann, Oppenweiler, DE;
Gots Brachert, Stuttgart, DE;
Rüdiger Herweg, Esslingen, DE;
Matthias Pfau, Ludwigsburg, DE;
Jochen Schäflein, Stuttgart, DE;
Hans-Jürgen Weimann, Oppenweiler, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a method for operating an internal combustion engine having a variable compression ratio either in a compression ignition or in a spark ignition operating mode depending on the engine operating point, a higher compression ratio is provided in the compression ignition mode than in the spark ignition mode so as to optimize the operation of the internal combustion engine at low and medium engine loads, and to reduce engine emissions.