公开(公告)号：US6145488A

公开(公告)日：2000-11-14

申请号：US354447

申请日：1999-07-15

申请人： Richard A. Plechner

发明人： Richard A. Plechner

IPC分类号： F02B25/14 ,  F02B33/10 ,  F02B33/12 ,  F02B33/14 ,  F02B37/04 ,  F02B75/02

CPC分类号： F02B37/04 ,  F02B25/14 ,  F02B33/10 ,  F02B33/12 ,  F02B33/14 ,  F02B2075/025 ,  Y02T10/144

摘要： A reduced volume scavenging system for a two cycle engine embodying a duplex cylinder having an upper cylinder bore and a reduced-diameter lower cylinder bore. The lower bore communicates with a crankcase that houses a crankshaft, connecting rod(s) and engine lubricating oil. A fixed sleeve lines the upper cylinder bore and extends up into the cylinder head. A piston disposed for reciprocating motion within the fixed sleeve has an attached cylindrical, reciprocating sleeve that extends down into the lower cylinder bore and moves with the piston. The reciprocating sleeve has compression rings that seal the lower bore and the crankcase against blowyby gases that might contaminate the oil. The fixed sleeve has an intake opening in registry with an inlet port in the upper cylinder bore for admission of fresh air-fuel mixture. The fixed sleeve also has an exhaust opening diametrically opposite the intake opening and in registry with an exhaust port in the upper cylinder bore, as well as upper and lower pairs of scavenging openings in registry with transfer passageways recessed into the upper cylinder bore, such that each out stroke of the piston forces fresh air-fuel mixture through the passageways and into the combustion chamber to flush out burnt gases. This arrangement permits use of four cycle engine lubricating methods and apparatus in two cycle engines, without unduly adding to their weight and complexity, thereby reducing the emission of air pollutants and increasing engine life.

摘要翻译： 一种用于双循环发动机的减小体积清除系统，其具有具有上气缸孔和缩径直径的下气缸孔的双相气缸。 下孔与容纳曲轴，连杆和发动机润滑油的曲轴箱连通。 一个固定的套管连接着上气缸孔并向上延伸到气缸盖中。 设置用于在固定套筒内往复运动的活塞具有连接的圆柱形往复式套筒，其向下延伸到下气缸孔中并与活塞一起移动。 往复式套筒具有密封下孔和曲轴箱的压缩环，以防止可能污染油的气泡。 固定套筒具有与上气缸孔中的入口对准的进气口，用于进入新鲜的空气 - 燃料混合物。 固定套筒还具有与进气开口径向相对的排气口，并与上气缸孔中的排气口对准，以及上下成对的扫气开口，其与凹入上气缸孔的输送通道对准，使得 活塞的每个出口冲程迫使新鲜的空气 - 燃料混合物通过通道进入燃烧室以冲洗燃烧的气体。 这种布置允许在两循环发动机中使用四循环发动机润滑方法和装置，而不会不适当地增加其重量和复杂性，从而减少空气污染物的排放和增加发动机寿命。