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. 06, 2007
Filed:
Jul. 11, 2005
Konrad Knaus, Gaildorf, DE;
Konrad Knaus, Gaildorf, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
An internal combustion engine () has a cylinder () wherein a piston () is mounted. The piston () drives a crankshaft () which is rotatably journalled in a crankcase (). The piston () delimits a combustion chamber wherein an air/fuel mixture is compressed and is ignited by an ignition device (). The ignition time point (Z) is determined in a first operating state of the engine () in accordance with a first characteristic line () and in a second operating state of the engine () in accordance with a second characteristic line (). A switching element switches over between the first characteristic line () and the second characteristic line () in dependence upon an engine characteristic variable. A method for operating the engine () provides that an engine characteristic variable is determined during operation of the engine () and that a switchover between the ignition characteristic lines () and () takes place for a pregiven change of the characteristic variable.