公开(公告)号：US20010015182A1

公开(公告)日：2001-08-23

申请号：US09739191

申请日：2000-12-18

申请人： Tecumseh Products Company

发明人： James W. Moorman ,  Erik J. Christiansen ,  Roberto Molina ,  Gar M. Adams

IPC分类号： F02F001/06 ,  F01M001/00

CPC分类号： F02B75/007 ,  F01M1/04 ,  F01M9/10 ,  F01M2001/126 ,  F01M2011/0083 ,  F02B63/02 ,  F02B75/16 ,  F02B2075/027 ,  F02B2275/20 ,  F02F1/002 ,  F02F2007/0063 ,  F02F2007/0092 ,  F05C2201/021

摘要： A single cylinder, internal combustion engine with a dry sump lubrication system. The engine includes an engine housing in which the overhead camshaft and crankshaft are rotatably supported, and the housing includes an integrally formed cylinder and head. A timing belt disposed externally of the engine housing interconnects the crankshaft and camshaft, and a piston connected to the crankshaft reciprocates within an internal bore provided in the engine housing cylinder. The cylinder wall around the internal bore is of a generally uniform thickness and circumscribed by cooling fins such that the cylinder resists bore distortion during operation. Dry sump lubrication is obtained by an external oil reservoir connected to a pump which supplies pressurized oil to the bearing journals of the camshaft. A portion of the oil at the camshaft bearing journals flows through passages provided within the cylinder to lubricate the bearing journals of the crankshaft. The reciprocating motion of the valve assemblies controlling intake and exhaust of the combustion chamber pumps the oil which lubricated the camshaft back to the external reservoir. The reciprocating motion of the piston similarly effects a high pressure within the crankcase cavity to pump oil which has lubricated the crankshaft back to the external reservoir. The inventive engine further provides for the mounting of flywheels within the crankcase cavity in conjunction with an external, lightweight fan for engine housing cooling, as well as employs a cast in valve seat for the overhead valve assemblies.

摘要翻译： 单缸，内燃机配有干式油底壳润滑系统。 发动机包括发动机壳体，其中顶置凸轮轴和曲轴可旋转地支撑，并且壳体包括一体形成的气缸和头部。 设置在发动机壳体外部的定时带将曲轴和凸轮轴互连，并且连接到曲轴的活塞在设置在发动机容纳缸内的内孔内往复运动。 内孔周围的圆筒壁具有大致均匀的厚度并由冷却翅片限定，使得气缸在操作期间抵抗孔的变形。 通过连接到泵的外部储油罐获得干式油底壳润滑油，该泵将压力油供应到凸轮轴的轴承轴颈。 凸轮轴轴承轴颈上的油的一部分流过设置在气缸内的通道，以润滑曲轴的轴承轴颈。 控制燃烧室的进气和排气的阀组件的往复运动泵送润滑凸轮轴的油回到外部储存器。 活塞的往复运动类似地在曲轴箱腔内产生高压以泵送已经将曲轴润滑回到外部储存器的油。 本发明的发动机还提供了用于发动机壳体冷却的外部轻质风扇的曲轴箱内的飞轮的安装，以及在阀座上用于顶置阀组件的铸件。