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:
Feb. 22, 2011
Filed:
Jul. 01, 2008
Andreas Bähner, Weinstadt, DE;
Andreas Lingen, Althütte, DE;
Georg Maier, Kernen i. R., DE;
Heinrich Leufen, Schwaikheim, DE;
Stanislaw Cichon, Fürth, DE;
Leo Kieβling, Cadolzburg, DE;
Andreas Bähner, Weinstadt, DE;
Andreas Lingen, Althütte, DE;
Georg Maier, Kernen i. R., DE;
Heinrich Leufen, Schwaikheim, DE;
Stanislaw Cichon, Fürth, DE;
Leo Kieβling, Cadolzburg, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A two-stroke engine has a cylinder with a combustion chamber delimited by a reciprocating piston, wherein the piston drives in rotation a crankshaft, and wherein a spark plug projects into the combustion chamber and ignites a fuel/air mixture. The two-stroke engine further has devices for supplying fuel and combustion air to the combustion chamber and a control unit that determines the ignition timing based on an ignition map. The ignition map indicates the ignition timing as a function of the engine speed for at least one first and one second operating states and for at least one first and one second engine speed ranges. The engine is controlled in that for an engine cycle the ignition timing is set in the second operating state at least within the first engine speed range based on the engine speed and on the number of engine cycles since the last combustion.