Internal combustion engine

US6152092A · kind A · utility

Assignee

• Aktiebolaget Electrolux · SE

Inventors

• Bo C. Andreasson · Gothenburg, SE
• Roy Ekdahl · Nordstraße, SE
• Hans Strom · Kode, SE
• Ulf Svensson · carrer de Sertori, SE
• by Gunnel Maria Vilhelmina Svensson, legal representative · carrer de Sertori, SE
• by Hubert Malte Svensson, legal representative · carrer de Sertori, SE

Key dates

• Filing date: Jun 21, 1999
• Grant date: Nov 28, 2000
• Expiry date: Jun 21, 2019

Classification

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

Abstract

Crankcase scavenged internal combustion engine (1) of two-stroke type, intended for a working tool, preferably a chain saw or a trimmer, and provided with a light-weight and compact muffler (2). The engine is arranged with a particularly high crankcase compression created in that at least one filling (3, 4, 5, 6) is placed into the compression area (7) under the engine piston (8) in form of a filled balance (3) and/or a piston filling (4) and/or a piston washer (5) and/or a stationary filling (6), at the same time as the engine is provided with an especially strong throttling created in the engine's exhaust side, i.e. in its exhaust port (9) and/or in a possible exhaust duct (10) and/or in the muffler (2).