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    • 1. 发明授权
    • Handheld work apparatus
    • 手持式工作装置
    • US08662047B2
    • 2014-03-04
    • US12149622
    • 2008-05-06
    • Predag OstojicAndreas LingenMichael SchmidJörg Amann
    • Predag OstojicAndreas LingenMichael SchmidJörg Amann
    • F02F1/22F02F3/24F16J9/22
    • F02N19/004F02B25/14F02B2075/025F02D15/04F02D2400/06
    • A handheld work apparatus has an internal combustion engine (9, 9′, 9″) and a starter device (8). The internal combustion engine has a piston (10, 10″) which has at least one piston ring (37, 38). In order to avoid a delay when starting the engine, at least one recess is provided in the cylinder bore (26) which bridges the at least one piston ring (37, 38) in at least one position of the piston (10, 10′) and which has a distance (n, o, p) to all function openings of the engine (9, 9′, 9″) configured in the cylinder bore (26). To reduce the compression in the combustion chamber (25), the piston (10′) has only one piston ring (37) or two piston rings (37, 38) are provided having respective piston ring gaps (39, 40) defining an angle (β) which is up to approximately 45°.
    • 手持式作业装置具有内燃机(9,9',9“)和起动装置(8)。 内燃机具有至少一个活塞环(37,38)的活塞(10,10“)。 为了在启动发动机时避免延迟,在缸孔(26)中设置至少一个凹槽,该凹槽将活塞(10,10')的至少一个位置上的至少一个活塞环(37,38) ),并且其具有构造在气缸孔(26)中的发动机(9,9',9“)的所有功能开口的距离(n,o,p)。 为了减小燃烧室(25)中的压缩,活塞(10')仅具有一个活塞环(37)或两个活塞环(37,38),其具有相应的活塞环间隙(39,40) (β),其高达约45°。