Die cast metal cylinder assembly for a two-stroke engine

US6491005B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Lars Bergmann · Waiblingen, DE
• Heiko Rosskamp · Adelberg, DE
• Igor Klaric · Bad Marienberg, DE
• Michael Raffenberg · Fellbach, DE
• Peter Pretzsch · Schorndorf, DE

Key dates

• Filing date: Apr 11, 2001
• Grant date: Dec 10, 2002
• Expiry date: Apr 11, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B2075/025
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A cylinder is produced of die cast metal and is for a two-stroke engine in a portable handheld work apparatus such as a motor chain saw. A combustion chamber (3) is formed in the cylinder (2) and this combustion chamber is delimited by a piston (5). In the cylinder wall (16), there is an outlet (10) for conducting away the combustion gases from the combustion chamber (3). Transfer channels (14a, 14b) are provided which open into the combustion chamber (3) via transfer windows (12, 15) and supply the operating medium from the crankcase (4) needed for operating the two-stroke engine. The transfer channels (14a, 14b) are configured in the cylinder wall (16) as channels opening radially to the outside and are closed by a seated cover (23).