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:
Jun. 12, 2007
Filed:
Nov. 18, 2005
Florian Hoche, Waiblingen, DE;
Niels Kunert, Sindelfingen, DE;
Horst Denner, Strümpfelbach, DE;
André Prager, Waiblingen, DE;
Florian Hoche, Waiblingen, DE;
Niels Kunert, Sindelfingen, DE;
Horst Denner, Strümpfelbach, DE;
André Prager, Waiblingen, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A two-stroke engine includes an air channel for supplying substantially fuel-free combustion air and a mixture channel for supplying an air/fuel mixture. The air channel and the mixture channel connect the cylinder of the two-stroke engine to an air filter. A section of the mixture channel and a section of the air channel are guided in a common component. In order to prevent induction of mixture into the air channel, the length (a) of the mixture channel and the length (b) of the air channel are so matched to each other that the pressure wave in the air channel, which forms during operation, oscillates in phase with the pressure wave formed in the mixture channel. The length (a) of the mixture channel is matched to an optimal fuel induction via the fuel opening. A method for tuning the two-stroke engine provides that the length (a) of the mixture channel is matched to an optimal fuel discharge from the fuel opening in a first step and, in a second step, the length (b) of the air channel is so matched to the length (a) of the mixture channel that the pressure wave in the air channel and the pressure wave in the mixture channel oscillate in phase during operation of the two-stroke engine.