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:
Aug. 05, 2003
Filed:
Dec. 14, 2001
Klaus Geyer, Sulzbach, DE;
Heiko Rosskamp, Adelberg, DE;
Andreas Stihl AG & Co., Waiblingen, DE;
Abstract
The invention is directed to a method for operating a two-stroke engine in a portable handheld work apparatus. The engine includes a cylinder ( ) and a combustion chamber ( ) which is delimited by a reciprocating piston ( ). The combustion chamber includes an outlet ( ) discharging exhaust gases and an inlet ( ) of a storage channel ( ). The inlet ( ) lies approximately opposite the outlet ( ) and the other end of storage channel ( ) opens via a controlled end ( ) into the crankcase ( ). Between its ends, the storage channel ( ) is connected to a first fuel metering device ( ) of a first fuel path; whereas, the crankcase ( ) has a crankcase inlet ( ) which is connected to a second fuel metering device ( ) of a second fuel path. In the case of an acceleration, additional fuel is metered to one or both fuel paths via an acceleration unit ( ). In order to ensure a powerful run-up of the engine in the case of acceleration, the acceleration device ( ) pumps into both fuel paths for an acceleration of the engine.