公开(公告)号：US06694939B2

公开(公告)日：2004-02-24

申请号：US10077952

申请日：2002-02-20

申请人： Akifumi Nomura ,  Yasuo Shimura ,  Akira Tokito ,  Kazuhisa Takemoto

发明人： Akifumi Nomura ,  Yasuo Shimura ,  Akira Tokito ,  Kazuhisa Takemoto

IPC分类号： F01L1308

CPC分类号： F01L13/08 ,  F01L2001/0535 ,  F01L2760/007 ,  F02B2275/20

摘要： In a decompression unit including a decompression arm, a decompression unit for internal combustion engine is provided in which the followability in the opening-and-closing operation of the air intake valve or the exhaust valve with respect to the cam at high-revolution speeds is satisfactory without increasing the equivalent inertia weight of the valve driving system, and for lowering the cost. A decompression unit includes a first decompression cam that takes the operating position when the number of revolutions of the engine is not more than the predetermined number of revolution during startup. A second decompression cam is provided that takes the operating position by manual operation. A decompression arm includes first and second abutting portions that abut against first and second decompression cams, respectively. An adjusting screw is provided for pressing the rocker arm and a resilient member for bringing the first abutting portion of the decompression arm into abutment against the first decompression cam. The decompression arm pivoted by the first and the second decompression cams pivots the rocker arm via the adjusting screw to open the exhaust valve.

摘要翻译： 在包括减压臂的减压单元中，设置有用于内燃机的减压单元，其中进气门或排气门在高转速时相对于凸轮的打开和关闭操作的跟随性为 满意而不增加阀驱动系统的等效惯量，并降低成本。 减压单元包括第一减压凸轮，其在发动机的转数不大于启动期间的预定转数时采取操作位置。 提供了通过手动操作来取得操作位置的第二减压凸轮。 减压臂包括分别抵靠第一和第二减压凸轮的第一和第二抵接部分。 提供调节螺钉，用于按压摇臂和用于使减压臂的第一邻接部分抵靠第一减压凸轮的弹性构件。 由第一和第二减压凸轮枢转的减压臂通过调节螺钉枢转摇臂以打开排气阀。

公开(公告)号：US06497211B2

公开(公告)日：2002-12-24

申请号：US09974884

申请日：2001-10-12

申请人： Akifumi Nomura ,  Tomio Onozato ,  Yasuo Shimura ,  Toshihiro Miki

发明人： Akifumi Nomura ,  Tomio Onozato ,  Yasuo Shimura ,  Toshihiro Miki

IPC分类号： F02F700

CPC分类号： F01M1/02 ,  F01M2011/0058 ,  F02B61/02 ,  F02B61/06 ,  F02B75/16 ,  F02B2075/027 ,  F02B2275/20 ,  F02F2001/245

摘要： A power unit has a power case which includes a crankcase portion integrally formed with a transmission case portion. The crankcase portion forms a crankcase in which the crankshaft of a 4-cycle internal combustion engine is received. The transmission case portion forms a transmission case in which a wet type multiple disc friction clutch for transmitting the torque of the crankshaft is received. A partition wall makes the crankcase independent of the transmission case, and thus separates the lubrication system of the internal combustion engine from the lubrication system of the friction clutch. The lubrication structure of the present invention can improve the durability of the friction clutch and make the friction clutch compact, and secure good connection performance of the friction clutch by separating the lubrication system of an internal combustion engine from the lubrication system of friction clutch.

摘要翻译： 动力单元具有动力箱，其包括与变速箱部分一体形成的曲轴箱部分。 曲轴箱部分形成曲轴箱，其中容纳四冲程内燃机的曲轴。 变速箱部分形成了用于传递曲轴的转矩的湿式多片摩擦离合器的变速箱。 隔壁使曲轴箱与变速箱无关，从而将内燃机的润滑系统与摩擦离合器的润滑系统分离。 本发明的润滑结构可以提高摩擦离合器的耐久性，并且使摩擦离合器紧凑，并且通过将内燃机的润滑系统与摩擦离合器的润滑系统分离来确保摩擦离合器的良好的连接性能。

公开(公告)号：US06453861B1

公开(公告)日：2002-09-24

申请号：US09974873

申请日：2001-10-12

申请人： Akifumi Nomura ,  Yasuo Shimura ,  Kazuhisa Takemoto ,  Akira Tokito

发明人： Akifumi Nomura ,  Yasuo Shimura ,  Kazuhisa Takemoto ,  Akira Tokito

IPC分类号： F01L126

CPC分类号： F01L1/047 ,  F01L1/022 ,  F01L1/181 ,  F01L1/26 ,  F01L2105/00

摘要： In an internal combustion engine, a pair of suction ports are formed on left and right sides of the rear of the cylinder head with respect to the vehicle body. A pair of exhaust ports is formed on left and right sides on the front side of the cylinder head. Suction poppet valves and exhaust poppet valves for opening and closing the suction ports and the exhaust ports are slidably fitted in guide tubes, respectively. In addition, a valve gear includes a camshaft and a rocker arm pivotally supported on a rocker arm shaft. The rocker arm is formed with a bifurcated end, which crosses an ignition plug on the exhaust poppet valve side. The suction poppet valves are directly driven to open and close by the camshaft.

摘要翻译： 在内燃机中，在气缸盖的后部的左右两侧相对于车体形成一对吸入口。 一对排气口形成在气缸盖前侧的左侧和右侧。 用于打开和关闭吸入口和排气口的抽吸提升阀和排气提升阀分别可滑动地装配在导管中。 此外，阀齿轮包括凸轮轴和枢转地支撑在摇臂轴上的摇臂。 摇臂形成有分叉端，其跨过排气提升阀侧的火花塞。 吸入提升阀直接由凸轮轴驱动打开和关闭。

公开(公告)号：US07699030B2

公开(公告)日：2010-04-20

申请号：US11878240

申请日：2007-07-23

申请人： Akifumi Nomura

发明人： Akifumi Nomura

IPC分类号： F01L1/34

CPC分类号： F01L13/0021 ,  F01L1/053 ,  F01L1/143 ,  F01L1/18 ,  F01L1/26 ,  F01L1/34 ,  F01L1/3442 ,  F01L13/0005 ,  F01L2001/0537 ,  F01L2001/34453 ,  F01L2001/34469 ,  F01L2001/34489

摘要： An internal combustion engine includes a variable valve system wherein each cam opens and closes an intake valve and an exhaust valve via each rocker arm. A variable valve system of an internal combustion engine E includes rocker arms rocked by the action of valve driving force of cams with each lift quantity variable mechanism varying a maximum lift quantity of an intake valve and an exhaust valve. The lift quantity variable mechanism includes a lifter that is driven by the cam, and makes the valve driving force act on the rocker arm and a lifter holder that supports the lifter, and is driven by an electric motor and is rocked. The lifter is movably supported by the lifter holder. Maximum lift quantity is varied by varying a position in which the lifter abuts on the rocker arm according to a position in which the lifter holder is turned.

摘要翻译： 内燃机包括可变阀系统，其中每个凸轮通过每个摇臂打开和关闭进气门和排气门。 内燃机E的可变阀系统包括通过凸轮的阀驱动力的作用而摇摆的摇臂，每个提升量可变机构改变进气门和排气阀的最大提升量。 提升量可变机构包括由凸轮驱动的升降器，并且使得阀驱动力作用在摇臂上，以及支撑升降器的升降器支架，并由电动机驱动并摇动。 升降机由升降器支架可移动地支撑。 通过根据升降器保持器转动的位置改变升降器抵靠摇臂的位置来改变最大提升量。

公开(公告)号：US07370617B2

公开(公告)日：2008-05-13

申请号：US11386832

申请日：2006-03-23

申请人： Hayato Maehara ,  Shinji Saito ,  Akifumi Nomura

发明人： Hayato Maehara ,  Shinji Saito ,  Akifumi Nomura

IPC分类号： F01L1/02

CPC分类号： F01L1/143 ,  F01L13/0005 ,  F01L2001/0537

摘要： A variable valve operating mechanism of a four-stroke internal combustion engine includes a slide pin energized by a pin spring in a direction while oil pressure acting on the slide pin in the opposite direction through oil pressure supply passages. The slide pin moves by controlling the oil pressure causing a stem contact surface and a stem through hole to selectively face a valve stem. The mechanism also includes an oil discharge passage including a discharge port which is opened to allow oil acting the slide pin to be discharged when the valve lifter is pressed by a valve operating cam to move for opening the valve. The mechanism is capable of quickly moving the slide pin upon the release of oil pressure when the valve comes into a quiescent state. Therefore, the response of transitioning the variable valve from an operating state to the quiescent state is improved.

摘要翻译： 四冲程内燃机的可变气门操作机构包括通过销弹簧沿着方向通过油压通过油压供给通道沿相反方向作用在滑动销上的方向而被驱动的滑动销。 通过控制油压使滑动销移动，导致杆接触表面和杆通孔，以选择性地面对阀杆。 该机构还包括一个排油通道，该排油通道打开，以便当阀提升器被阀操作凸轮按压以移动以打开阀门时，允许作用于滑销的油排出。 该机构能够在阀进入静止状态时在释放油压时快速移动滑动销。 因此，可变阀从运转状态转移到静止状态的响应得到改善。

公开(公告)号：US06698393B2

公开(公告)日：2004-03-02

申请号：US10199110

申请日：2002-07-22

申请人： Akifumi Nomura

发明人： Akifumi Nomura

IPC分类号： F02F700

CPC分类号： F02B61/02 ,  F02B41/00

摘要： A crankshaft phase adjustment structure for performing work via a single window. A clutch and ACG are arranged on both right and left sides of a crankcase. On the side of the clutch of the crankshaft, a primary drive gear engaged with a primary driven gear of the clutch is fixed by a bolt. A window for performing work is open to a case cover in the vicinity of the bolt and is covered with a cap. The center line of the window for performing work is set off the axis of the bolt, the window for performing work is located in a position in which a head of the bolt and an alignment mark provided to the outside periphery of the side of the primary drive gear are simultaneously viewed. At the edge of the window for performing work a second alignment mark is provided.

摘要翻译： 一种用于通过单个窗口进行作业的曲轴相位调整结构。 一个离合器和ACG布置在曲轴箱的左右两侧。 在曲轴的离合器侧，通过螺栓固定与离合器的主从动齿轮啮合的主驱动齿轮。 用于执行作业的窗口对于螺栓附近的壳体盖开放并且被盖子覆盖。 用于进行作业的窗口的中心线从螺栓的轴线排出，执行作业的窗口位于螺栓的头部和设置在主要侧面的外周的对准标记的位置 同时观察驱动齿轮。 在用于执行工作的窗口的边缘处，提供第二对准标记。

公开(公告)号：US06672271B2

公开(公告)日：2004-01-06

申请号：US10124346

申请日：2002-04-18

申请人： Akifumi Nomura ,  Yasuo Shimura

发明人： Akifumi Nomura ,  Yasuo Shimura

IPC分类号： F02F700

CPC分类号： F16C35/06 ,  F02F7/0053 ,  F16C3/10 ,  F16C9/02 ,  F16C19/06 ,  F16C19/26 ,  F16C19/54

摘要： A crankshaft support structure for an engine. An inner race forming a part of a main bearing is loosely fitted onto a bearing seat of a shaft. A direction of thrust is fixed by a flange of a timing sprocket which is press-fitted onto the shaft. The outer diameter R1 of the timing sprocket and the outer diameter R3 of the flange are respectively set so that they are smaller than the outer diameter R4 of the inner race. An outer race of the main bearing is press-fitted and fixed to the side of a left crankcase and a roller is integrated. When the shaft enters the inside of the roller, the timing sprocket and the flange pass through the inside of the roller, and the inner race is fitted to the roller. As a result, the inner diameter R2 of the inner race can be made smaller than the outer diameter R1 of the timing sprocket. Thus the main bearing supporting the crankshaft is miniaturized and lightened.

摘要翻译： 用于发动机的曲轴支撑结构。 形成主轴承的一部分的内圈松散地安装在轴的轴承座上。 推力方向由压配在轴上的正时链轮的凸缘固定。 正时链轮的外径R1和凸缘的外径R3分别设定为小于内圈的外径R4。 主轴承的外圈压配合并固定在左曲轴箱的一侧，并且一体成型。 当轴进入滚筒内部时，正时链轮和法兰通过滚筒内部，内圈安装在滚筒上。 结果，内圈的内径R2可以小于正时链轮的外径R1。 因此，支撑曲轴的主轴承小型化和轻量化。