| 摘要 |
The invention relates to a two-stroke engine in a portable handheld work apparatus such as a motor chain saw. A combustion chamber (3) is formed in a cylinder (2) and is delimited by a piston (5). The piston (5) drives a crankshaft (7) via a connecting rod (6). The crankshaft is journalled in a crankcase (4). Air is supplied to the combustion chamber (3) via a first outlet-near transfer channel (15); whereas, the air/fuel mixture, which is needed for operation, flows in via a second outlet-remote transfer channel (12) from the crankcase (4). The constructive volume of the outlet-near transfer channel (15) is designed to be approximately 20% to 60% of the volumetric total air input of the engine (1) in order to achieve a complete charge of the combustion chamber while having low scavenging losses.
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