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. 28, 2006
Filed:
Jan. 20, 2004
Gerhard Osburg, Kernen, DE;
Wolfgang Luithardt, Waiblingen, DE;
Simon Jug, Fellbach, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A two-stroke engine () is especially for a handheld work apparatus such as a motor-driven chain saw, a cutoff machine or the like and has a cylinder () wherein a combustion chamber () is formed. The combustion chamber () is delimited by a reciprocating piston (). The piston () drives a crankshaft () via a connecting rod (). The crankshaft () is rotatably journalled in the crankcase (). The combustion chamber () is connected to the crankcase () at pregiven piston positions via at least one transfer channel (). The combustion chamber () has an outlet () for exhaust gases. An air channel () is provided which conducts combustion air into the crankcase () and a throttle element is mounted in the air channel (). A compact configuration of the two-stroke engine () can be achieved when a separate fuel inlet () is provided in the crankcase () which is fed by a fuel metering system (). The fuel metering system () has means for supplying fuel in dependence upon the position of the throttle element and/or in dependence upon the engine rpm. A method for operating the two-stroke engine () provides that the fuel is prepared to an air/fuel mixture in the crankcase () with the combustion air supplied via the air inlet ().