| 摘要 |
<p>A crankcase scavenged internal combustion engine (1) for a portable tool, such as a chain saw or a power cutter, comprising: a cylinder (2) with a reciprocating piston (3) that above itself delimits a combustion chamber (4) and below itself delimits a crankcase volume (5) with a crankshaft (6), and the crankcase volume contains at least air and a lubricant (7), e.g. oil. At least one duct (8, 9) provided with a check valve (13) connects the crankcase volume (5) or a connected volume (14) with a lubricating place (15).</p> |
