公开(公告)号：US5267536A

公开(公告)日：1993-12-07

申请号：US801709

申请日：1991-12-02

申请人： Youichi Imagawa ,  Hiroshi Kohmoto ,  Jens K. Olsen

发明人： Youichi Imagawa ,  Hiroshi Kohmoto ,  Jens K. Olsen

IPC分类号： F01L1/04 ,  F01L1/08 ,  F01L1/12 ,  F01L1/14 ,  F01L1/18 ,  F02B63/02 ,  F02B75/02 ,  F02B75/16 ,  F02F1/24 ,  F02F1/38 ,  F01L1/26

CPC分类号： F01L1/04 ,  F01L1/08 ,  F01L1/12 ,  F01L1/146 ,  F01L1/18 ,  F01L1/181 ,  F02B63/02 ,  F02B75/16 ,  F02F1/38 ,  F01L1/02 ,  F01L1/026 ,  F02B2075/027 ,  F02B2275/34 ,  F02F2001/247 ,  F05C2201/021 ,  F05C2251/042

摘要： A four-stroke cycle engine unit for a working machine, for example, generally a valve drive mechanism for driving the exhaust and intake valves. The valve drive mechanism comprises a crank cam assembly mounted to a crank shaft of the engine unit so as to be rotated in accordance with rotation of the crank shaft, a cam gear assembly mounted on the cam shaft and meshed with the crank cam assembly, a cam assembly mounted onto the cam gear assembly so as to be rotated in accordance with rotation of the cam gear assembly, a pair of first and second lifters mounted on a lifter axis portion positioned in parallel to the crank shaft, the lifters being rocked in accordance with rotation of the cam assembly, a pair of first and second push rods lifted up and lowered in accordance with rocking motions of the first and second lifters, respectively, and a pair of first and second rocker arms operated in association with the first and second push rods. The lifter axis portion and the cam shaft are positioned in a plane including the crank and a center line of a cylinder of a piston-cylinder assembly of the engine unit. The first rocker arm is connected to the exhaust valve so as to carry out open-close operation thereof and the second rocker arm is connected to the intake valve so as to carry out open-close operation thereof.

摘要翻译： 用于工作机械的四冲程循环发动机单元，例如通常是用于驱动排气和进气阀的阀驱动机构。 阀驱动机构包括安装到发动机单元的曲轴上的曲柄凸轮组件，以便根据曲​​柄轴的旋转而旋转，安装在凸轮轴上并与曲柄凸轮组件啮合的凸轮齿轮组件， 凸轮组件安装在凸轮齿轮组件上以便根据凸轮齿轮组件的旋转而旋转，一对第一和第二升降器安装在平行于曲轴的定位轴部分上，升降器按照 随着凸轮组件的旋转，一对第一和第二推杆分别根据第一和第二升降器的摆动运动而上下升降，并且一对第一和第二摇臂与第一和第二升降器相关联地操作 推杆。 升降机轴部和凸轮轴定位在包括曲柄的平面和发动机单元的活塞 - 气缸组件的气缸的中心线。 第一摇臂与排气阀连接，进行开闭动作，第二摇臂与进气阀连接，进行开闭动作。

公开(公告)号：US5213074A

公开(公告)日：1993-05-25

申请号：US964926

申请日：1992-10-22

申请人： Youichi Imagawa ,  Hiroshi Kohmoto

发明人： Youichi Imagawa ,  Hiroshi Kohmoto

IPC分类号： F01L1/14 ,  F01L1/18 ,  F01M9/06 ,  F01M9/10 ,  F02B63/02 ,  F02B75/02 ,  F02B75/16

CPC分类号： F02B75/16 ,  F01L1/14 ,  F01L1/181 ,  F01M9/06 ,  F01M9/10 ,  F02B63/02 ,  F01L2810/02 ,  F02B2075/027 ,  F02B2275/34

摘要： A four-stroke cycle engine unit for a working machine has generally a lubricating device for lubricating mechanical parts in a valve chamber and a cam chamber. The lubricating device comprises a body which has the cam chamber and a crank chamber, a cylinder head and a head cover having the valve chamber, and a mechanism for preventing a lubricating oil from escaping from at least one of through holes for push rods provided in a wall of the valve chamber and the cam chamber.

摘要翻译： 用于工作机械的四冲程循环发动机单元通常具有用于润滑阀室和凸轮室中的机械部件的润滑装置。 润滑装置包括具有凸轮室和曲柄室的主体，气缸盖和具有阀室的头盖，以及用于防止润滑油从设置在...中的推杆的至少一个孔中逸出的机构 阀室和凸轮室的壁。

公开(公告)号：US5176116A

公开(公告)日：1993-01-05

申请号：US812691

申请日：1991-12-23

申请人： Youichi Imagawa ,  Hiroshi Kohmoto

发明人： Youichi Imagawa ,  Hiroshi Kohmoto

IPC分类号： F01L1/14 ,  F01L1/18 ,  F01M9/06 ,  F01M9/10 ,  F02B63/02 ,  F02B75/02 ,  F02B75/16

CPC分类号： F01L1/181 ,  F01L1/14 ,  F01M9/06 ,  F01M9/10 ,  F02B63/02 ,  F02B75/16 ,  F02B2075/027 ,  F02B2275/34

摘要： A four-stroke cycle engine unit for a working machine has generally a lubricating device for lubricating mechanical parts in a valve chamber and a cam chamber. The lubricating device comprises a body which has the cam chamber and a crank chamber, a cylinder head and a head cover having the valve chamber, and a mechanism for preventing a lubricating oil from escaping from at least one of through holes for push rods provided in a wall of the valve chamber and the cam chamber.

摘要翻译： 用于工作机械的四冲程循环发动机单元通常具有用于润滑阀室和凸轮室中的机械部件的润滑装置。 润滑装置包括具有凸轮室和曲柄室的主体，气缸盖和具有阀室的头盖，以及用于防止润滑油从设置在...中的推杆的至少一个孔中逸出的机构 阀室和凸轮室的壁。

公开(公告)号：US5243937A

公开(公告)日：1993-09-14

申请号：US814142

申请日：1991-12-27

申请人： Youichi Imagawa

发明人： Youichi Imagawa

IPC分类号： F01M11/00 ,  F01M11/06 ,  F01M13/00 ,  F02B63/02 ,  F02B75/02 ,  F02F7/00 ,  F02M37/12

CPC分类号： F01M11/065 ,  F02B63/02 ,  F02F7/0004 ,  F02B2075/027 ,  F02B2275/30 ,  F02B2275/34

摘要： A four-stroke cycle engine particularly for a working machine including a crank chamber structure comprises a crank chamber body defining a crank chamber in which a lubrication oil is sealed and in which a crank shaft mounting a counter-weight member thereon is rotatably supported, a rib member provided for the crank chamber body projecting in the crank chamber near the counter-weight member and a cover member for covering the crank chamber body. The cover member is provided with a projecting portion substantially facing a side surface of the counter-weight member and projecting deeply inside the crank chamber. The cover member comprises a main cover body secured to the crank chamber body, a side wall portion having a rotation surface of substantially a fallen trapezoidal shape in section, and a circular wall portion formed integrally with the side wall portion, the side wall portion and the circular wall portion constituting the projecting portion projecting inside the crank chamber as an integrated structure. The projecting portion is disposed substantially concentrically with a rotation axis of the crank shaft.

摘要翻译： 一种特别用于包括曲柄室结构的工作机械的四冲程循环发动机包括限定曲柄室的曲轴室主体，其中润滑油被密封在其中，其中安装有配重构件的曲轴可旋转地支撑在该曲轴室中， 肋构件，其设置在靠近配重构件的曲柄室中突出的曲柄室主体和用于覆盖曲柄室主体的盖构件。 盖构件设置有大致面对配重构件的侧表面并突出到曲柄室内的突出部分。 盖构件包括固定到曲柄室主体的主盖体，具有大致下降的梯形截面的旋转表面的侧壁部分和与侧壁部分，侧壁部分和 构成突出部的圆形壁部分作为一体结构突出在曲柄室内。 突出部分与曲柄轴的旋转轴线基本上同心地设置。