公开(公告)号：US5267536A

公开(公告)日：1993-12-07

申请号：US801709

申请日：1991-12-02

Applicant: Youichi Imagawa ,  Hiroshi Kohmoto ,  Jens K. Olsen

Inventor： Youichi Imagawa ,  Hiroshi Kohmoto ,  Jens K. Olsen

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US5193493A

公开(公告)日：1993-03-16

申请号：US819228

申请日：1992-01-10

Applicant: Theodore P. Ickes

Inventor： Theodore P. Ickes

IPC: F01L1/04 ,  F01L1/053 ,  F01L1/08 ,  F01L1/30 ,  F01L5/04 ,  F02B1/04 ,  F02B3/06 ,  F02B41/04 ,  F02B75/04 ,  F02B75/28

CPC classification number: F01L5/045 ,  F01L1/04 ,  F01L1/053 ,  F01L1/0532 ,  F01L1/08 ,  F01L1/30 ,  F02B41/04 ,  F02B75/04 ,  F02B75/28 ,  F02B1/04 ,  F02B3/06

Abstract: An internal combustion engine in which the combustion chamber volume is reduced during the movement of the power piston in its compression and power stroke. This permits delaying the time or maximum combustion pressure, due to the ignition and expansion of the compressed fuel/air charge, until the power piston is well past top dead center (TDC), 35 degrees after TDC for example. One advantage to this mode of operation is that the engine crankshaft journal has moved to a position where the axis of the journal is more offset, compared to at or near TDC, from the axis of rotation of the crankshaft so engine torque is increased. This is accomplished by a pair of half round valving pistons mounted in a bore in the cylinder head. The axis of the cylinder head bore coincides with the axis of the engine block bore in which the power piston moves. A camshaft assembly mounted in the cylinder head includes cam discs that are connected to the valving pistons. The cam discs move the valving pistons in a reciprocating manner that adjusts the size of the combustion chamber and opens and closes intake and exhaust ports formed in the walls of the combustion chamber. Downward movement of the valving pistons begins when the power piston approaches TDC and continues during the initial downward movement of the power piston durings its power stroke. This results in a secondary compression that adds to the compression due to the power piston and also slows the rate at which the combustion chamber increases in volume due to downward movement of the power piston. A cylinder head constructed in accordance with this invention could be adapted to existing engines.

Abstract translation: 一种在动力活塞在其压缩和动力行程中运动期间燃烧室体积减小的内燃机。 这允许延迟由于压缩的燃料/空气装料的点燃和膨胀而引起的时间或最大燃烧压力，直到动力活塞在TDC之后35度处于上止点（TDC）35度之后。 这种操作模式的一个优点是，与曲轴的旋转轴相比，发动机曲轴轴颈已经移动到轴颈的轴线比在TDC处或附近更偏移的位置，因此发动机扭矩增加。 这通过安装在气缸盖中的孔中的一对半圆形阀活塞来实现。 气缸盖孔的轴线与动力活塞运动的发动机缸体孔的轴线重合。 安装在气缸盖中的凸轮轴组件包括连接到阀活塞的凸轮盘。 凸轮盘以往复运动的方式移动阀活塞，该活塞调节燃烧室的尺寸并且打开和关闭形成在燃烧室的壁中的进气和排气口。 阀活塞的向下运动在动力活塞接近TDC时开始，并且在动力活塞在其动力冲程期间的初始向下运动期间继续。 这导致二次压缩，由于动力活塞而增加了压缩，并且还降低了由于动力活塞的向下运动而使燃烧室体积增加的速率。 根据本发明构造的气缸盖可适用于现有发动机。

公开(公告)号：US4621597A

公开(公告)日：1986-11-11

申请号：US657338

申请日：1984-10-03

Applicant: Keiichi Kawada ,  Takahiro Okuyama ,  Susumu Toki

Inventor： Keiichi Kawada ,  Takahiro Okuyama ,  Susumu Toki

IPC: F01M1/06 ,  F01L1/04 ,  F01L1/053 ,  F01L1/12 ,  F01L1/18 ,  F01L1/26 ,  F01M9/10 ,  F01M11/02 ,  F02B1/04 ,  F02B75/02 ,  F02F1/24 ,  F02F1/42

CPC classification number: F01M9/10 ,  F01L1/04 ,  F01L1/053 ,  F01L1/12 ,  F01L1/185 ,  F01L1/26 ,  F02F1/4214 ,  F01L2001/0476 ,  F01L2001/0537 ,  F01M11/02 ,  F01M9/102 ,  F01M9/104 ,  F02B1/04 ,  F02B2075/027 ,  F02B2275/18 ,  F02F2001/245

Abstract: A cylinder head for DOHC type internal combustion engine with a center block integrally formed over each cylinder with portions for supporting the rocker arm bearings and a central hole for receiving the ignition plug. Two main oil supply passages are integrally formed in the head and extending longitudinally on either side of the plug holes for supplying lubricant to the rocker arm bearings and the camshaft bearings on each side.

Abstract translation: 一种用于DOHC型内燃机的气缸盖，其中心块整体地形成在每个气缸上，具有用于支撑摇臂轴承的部分和用于接收火花塞的中心孔。 两个主要供油通道一体地形成在头部中，并且在插头孔的任一侧上纵向延伸，用于向每个侧面上的摇臂轴承和凸轮轴轴承提供润滑剂。

公开(公告)号：US4061115A

公开(公告)日：1977-12-06

申请号：US691429

申请日：1976-06-01

Applicant: Wilfred F. Predhome, Jr.

Inventor： Wilfred F. Predhome, Jr.

IPC: F01L1/30 ,  F01L13/00 ,  F01L1/34

CPC classification number: F01L1/0532 ,  F01L1/04 ,  F01L1/047 ,  F01L1/14 ,  F01L1/181 ,  F01L1/30 ,  F01L13/0015 ,  F01L2001/0535 ,  F01L2001/054 ,  Y10T74/18312

Abstract: A system for varying valve timing; i.e. the rotational angle of the crankshaft during which an intake or an exhaust valve of a cylinder of a reciprocating internal combustion engine is open which results in varying valve overlap, and for varying valve lift of such intake and exhaust valves. A desmodromic cam and cam follower convert rotation of a cam shaft to reciprocating rotation, or oscillation, of the cam follower. The reciprocating rotation of the cam follower is converted by the interaction of a secondary cylindrical cam, a cylindrical control ring, and a reciprocating member to linear motion of the reciprocating member which reciprocating member is operatively connected to a poppet valve. Timing and lift of the reciprocating member and valve are variable over predetermined limits as a function of engine rpm and load by rotation of the cylindrical control ring. Each valve train positively closes as well as opens its associated valve.

Abstract translation: 用于改变气门正时的系统 即曲轴的旋转角度，在此期间往复式内燃机的气缸的进气门或排气门打开，这导致阀重叠的变化，以及用于改变这种进气门和排气门的气门升程。 解调器凸轮和凸轮随动件将凸轮轴的旋转转换为凸轮从动件的往复旋转或振动。 凸轮从动件的往复旋转通过副圆柱形凸轮，圆柱形控制环和往复运动构件的相互作用转换成往复运动构件与往复运动构件可操作地连接到提升阀的直线运动。 往复式构件和阀门的定时和升程通过圆柱形控制环的旋转作为发动机转速和负载的函数而变化超过预定极限。 每个阀门正确关闭以及打开其相关的阀门。

公开(公告)号：US3585974A

公开(公告)日：1971-06-22

申请号：US3585974D

申请日：1969-02-28

Applicant: WEBER ROBERT L

Inventor： WEBER ROBERT L

IPC: F01L1/04 ,  F01L1/12 ,  F01L1/30 ,  F01L1/32

CPC classification number: F01L1/026 ,  F01L1/04 ,  F01L1/12 ,  F01L1/146 ,  F01L1/181 ,  F01L1/30 ,  F01L1/46 ,  Y10T74/18992

Abstract: The invention contemplates a valve-actuating system wherein purely longitudinal displacement is achieved upon relative rotation of members in coaxial, helically cammed relation. A number of different embodiments are disclosed whereby the desired rotation is effected, and illustrative employments are described for valve actuation derived from various cam structures, including a cam with spring-loaded follower, and a desmodromic cam, as well as block-mounted and overhead camshaft forms thereof.