公开(公告)号：WO2011039980A1

公开(公告)日：2011-04-07

申请号：PCT/JP2010/005753

申请日：2010-09-22

Applicant: HITACHI KOKI CO., LTD. ,  TAKEDA, Takeshi ,  HORIUCHI, Takamoto ,  OHIRA, Hiroshi ,  HIRAI, Takahiro ,  KURIHARA, Katsumi

Inventor： TAKEDA, Takeshi ,  HORIUCHI, Takamoto ,  OHIRA, Hiroshi ,  HIRAI, Takahiro ,  KURIHARA, Katsumi

IPC: F01M11/00 ,  F01M11/06

CPC classification number: F01M11/0004 ,  F01M11/065 ,  F01M2011/0033 ,  F01M2011/005

Abstract: There is provided a four-cycle engine which can appropriately circulate oil in an engine regardless of a tilted condition with a simple structure. A crankcase (4) of a four-cycle engine (1) has a crank room (41) which rotatably supports a crankshaft (10) and an oil room (42) which is provided adjacent to the exterior of the crank room (41). The crankcase (4) also has partition walls (43) and (44) which partition the interior of the crankcase (4) into the crank room (41) and the oil room (42), respectively, and a communication path (45) which communicates the crank room (41) with the oil room (42). The partition walls (43) and (44) each has a cross section formed in a substantially V shape, and the communication path (45) is formed at an apex between the partition walls (43) and (44).

Abstract translation: 提供了一种四冲程发动机，其可以以简单的结构适当地在发动机中循环油，而不管倾斜状况如何。 四冲程发动机（1）的曲轴箱（4）具有可旋转地支撑曲轴（10）的曲柄室（41）和与曲柄室（41）的外部相邻设置的油室（42） 。 曲轴箱（4）还具有将曲轴箱（4）的内部分别分配到曲柄室（41）和油室（42）中的分隔壁（43）和（44）和连通路径（45） 其将曲柄室（41）与油室（42）连通。 分隔壁（43）和（44）各自具有形成为大致V形的横截面，并且连通路径（45）形成在分隔壁（43）和（44）之间的顶点处。