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51. 发明授权

US06561154B2 Engine head cover structure 有权
公开(公告)号：US06561154B2
公开(公告)日：2003-05-13
申请号：US09984167
申请日：2001-10-29
申请人： Keita Ito , Takeshi Maeda , Yasutake Ryu , Takao Nishida
发明人： Keita Ito , Takeshi Maeda , Yasutake Ryu , Takao Nishida
IPC分类号： F01M304
CPC分类号： F01L1/18 , F01L1/02 , F01L1/024 , F01L1/053 , F01M2013/0488 , F02B63/02 , F02B2075/027 , F02B2275/20 , F02F1/002 , F02F7/006
摘要： An engine head cover structure has a head cover joined to the upper end of a cylinder head so as to define a valve operation chamber therebetween. The head cover includes therein an oil recovery chamber to which oil resided in the valve operation chamber is recovered by suction and a breather chamber that removes blowby gas from the valve operation chamber being provided in the head cover. The breather chamber is defined between a partition plate mounted on an inner wall of the head cover via clips and a surface of the roof of the head cover, and the oil recovery chamber is defined between the partition plate and a partition body welded thereto. It is thus possible to form the oil recovery chamber and the breather chamber without splitting the roof of the head cover, thereby making inspection of the joint for oil tightness unnecessary.

52. 发明授权

US06530355B2 4-cycle engine 有权
公开(公告)号：US06530355B2
公开(公告)日：2003-03-11
申请号：US09900467
申请日：2001-07-09
申请人： Keita Ito , Takao Nishida , Atsushi Miyazaki , Tetsuya Arai
发明人： Keita Ito , Takao Nishida , Atsushi Miyazaki , Tetsuya Arai
IPC分类号： F01M100
CPC分类号： F02B63/02 , F01M1/04 , F01M2001/126 , F02B77/11 , F02B2075/027
摘要： A 4-cycle engine includes an oil tank mounted to one side of an engine body, and an oil slinger accommodated in the oil tank and adapted to scatter an oil stored in said oil tank to generate a lubricating oil mist. In the 4-cycle engine, a timing transmitting case is interposed between the engine body and the oil tank, so that heat transmission from the engine body to the oil tank is shielded. Thus, the oil tank can be disposed at a location spaced apart from the engine body without bringing about an increase in size of the engine, thereby suppressing the heat transmission from the engine body to the oil tank to the utmost to prevent overheating of the oil in the oil tank.

53. 发明授权

US06510829B2 Handheld type four-cycle engine 有权
标题翻译：手持式四冲程发动机
公开(公告)号：US06510829B2
公开(公告)日：2003-01-28
申请号：US09808401
申请日：2001-03-15
申请人： Keita Ito , Takao Nishida , Sei Watanabe
发明人： Keita Ito , Takao Nishida , Sei Watanabe
IPC分类号： F01M906
CPC分类号： F01M1/04 , F01L1/024 , F01M9/06 , F01M11/064 , F02B63/02 , F02B2075/027 , F02B2275/34
摘要： In a handheld type OHV engine, an oil tank is provided so as to be connected to one side wall running the length of a crankcase and a cylinder block, the oil tank houses oil mist generation means to and a rotational movement section of a valve operation mechanism, and the oil mist generated in the oil tank is supplied from a crank chamber to a valve operation chamber of a cylinder head housing a reciprocating movement section of the valve operation mechanism, and is returned to the oil tank by utilizing the pressure pulsations of the crank chamber and a one-way valve. It is thus possible to lubricate the inside of the crank chamber and the valve operation mechanism reliably regardless of the operational position of the handheld type OHV engine while reducing the overall height of the engine.
摘要翻译：在手持式OHV发动机中，设置油箱，以连接到一个流过曲轴箱和气缸体的长度的侧壁，油箱将油雾产生装置和阀操作的旋转运动部分机构，并且油箱中产生的油雾从曲轴室供给到容纳阀操作机构的往复运动部的气缸盖的气门操作室，并通过利用压力脉动返回到油箱曲柄室和单向阀。因此，无论手持型OHV发动机的操作位置如何，同时可以减小发动机的整体高度，可以可靠地润滑曲柄室内部和气门操作机构。

54. 发明授权

US06494176B2 Oil mist generation system in handheld type four-cycle engine 有权
标题翻译：手油式四冲程发动机油雾发生系统
公开(公告)号：US06494176B2
公开(公告)日：2002-12-17
申请号：US09808405
申请日：2001-03-15
申请人： Keita Ito , Takao Nishida , Sei Watanabe
发明人： Keita Ito , Takao Nishida , Sei Watanabe
IPC分类号： F01M100
CPC分类号： F02B75/16 , F01M1/04 , F01M9/06 , F02B63/02 , F02B2075/027 , F02B2275/34 , F02F1/002 , F02F1/06
摘要： In an oil mist generation system, an oil slinger is disposed in an oil tank and is rotated by a crankshaft, the oil slinger scattering oil store in the oil tank by the rotation of the oil slinger so as to generate an oil mist. The oil mist generation system includes a drive gear provided on the crankshaft, and at least three oil slingers supported on three support shafts and simultaneously driven by the drive gear, the three support shafts being arranged around the drive gear. Therefore, besides a circular shape, various shapes can be imparted to the peripheral wall of the oil tank.
摘要翻译：在油雾产生系统中，油甩油器设置在油箱中并通过曲轴旋转，油甩油机通过油甩油器的旋转而储存在油箱中，从而产生油雾。油雾产生系统包括设置在曲轴上的驱动齿轮和至少三个支撑在三个支撑轴上并同时由驱动齿轮驱动的油吊索，三个支撑轴布置在驱动齿轮周围。因此，除了圆形外，还可以向油箱的周壁施加各种形状。

55. 发明授权

US06484679B2 Engine valve operation mechanism 失效
公开(公告)号：US06484679B2
公开(公告)日：2002-11-26
申请号：US09984156
申请日：2001-10-29
申请人： Keita Ito , Takeshi Maeda , Takao Nishida
发明人： Keita Ito , Takeshi Maeda , Takao Nishida
IPC分类号： F01L1053
CPC分类号： F02B63/02 , F01L1/02 , F01L1/024 , F01L1/053 , F01L1/18 , F02B75/16 , F02B2075/027 , F02B2275/20 , F02F1/002
摘要： In an engine valve operation mechanism, opposite ends of a support shaft that supports a cam in a rotatable manner are supported in a first support hole of a first support wall formed in a cylinder head and a second support hole of a second support wall placed inwardly from the first support wall relative to the cylinder head, thereby allowing the support shaft to be inserted into the first support hole and the second support hole from outside the cylinder head, and an inner face of a head cover prevents the support shaft from becoming detached from the first support hole. The axial movement of the cam support shaft can thereby be restricted without employing a special stopper member, and the leakage of lubricating oil for the support shaft can be prevented without using a special sealing member.

56. 发明授权

US06427672B1 Valve-operating device with breather system in engine 有权
标题翻译：发动机带呼吸系统的阀门操作装置
公开(公告)号：US06427672B1
公开(公告)日：2002-08-06
申请号：US09901568
申请日：2001-07-11
申请人： Keita Ito , Takao Nishida , Shigeki Edamatsu
发明人： Keita Ito , Takao Nishida , Shigeki Edamatsu
IPC分类号： F01M1300
CPC分类号： F01L1/02 , F01L1/024 , F01L1/047 , F01L1/053 , F01L1/18 , F01L1/46 , F02B63/02 , F02B2075/027
摘要： In a valve-operating device with a breather system in an engine, in which a breather passage is defined in a cam shaft, a bearing cap is detachably secured to the engine body for supporting an outer peripheral surface of one end portion of the camshaft with a bearing. A breather chamber is provided in the bearing cap in order to communicate with the outlet of the breather passage. A pipe-connecting portion is integrally formed on an outer peripheral surface of the bearing cap; and a breather pipe connected to an intake system is connected to the pipe-connecting portion. Thus, a blow-by gas can be drawn through the breather passage in the valve-operating camshaft to the outside by utilizing a portion of a valve-operating camshaft supporting structure. It is thus possible to simplify the structure of the valve-operating device with the breather system.
摘要翻译：在具有在发动机中具有通气系统的气门操作装置中，其中在凸轮轴中限定了通气通道，轴承盖可拆卸地固定到发动机主体上，用于支撑凸轮轴的一个端部的外周表面，轴承。通气室设置在轴承盖中，以便与通气通道的出口相通。管连接部一体地形成在轴承盖的外周面上; 并且连接到进气系统的通气管连接到管连接部分。因此，通过利用一部分阀操作凸轮轴支撑结构，窜气可以通过阀操作凸轮轴中的通气通道被吸入外部。因此，可以通过通气系统简化阀操作装置的结构。

57. 发明授权

US06250273B1 4-cycle engine 有权
标题翻译： 4冲程发动机
公开(公告)号：US06250273B1
公开(公告)日：2001-06-26
申请号：US09357772
申请日：1999-07-21
申请人： Yasutake Ryu , Takao Nishida , Keita Ito
发明人： Yasutake Ryu , Takao Nishida , Keita Ito
IPC分类号： F01L102
CPC分类号： F01L1/02 , F01L1/024 , F01L1/047 , F01L1/146 , F01L1/18 , F02B75/16 , F02B2075/027 , F02B2275/34 , F02F1/002
摘要： A crankcase includes first and second case halves which are coupled to each other at a parting plane extending to obliquely intersect the axis of first and second bearing portions. A cylinder barrel and the first bearing portion are formed by molding integrally on the first case half to form an engine block. The second bearing portion is formed by molding integrally on the second case half and a side cover is coupled to an outer side surface of the engine block to define a valve operating chamber for accommodation of a valve operating mechanism. Thus, the distance between the first and second bearing portions for supporting opposite ends of a crankshaft can be reduced without being interfered by the valve operating mechanism, thereby enhancing the durability of the crankshaft. The valve operating mechanism can be assembled after coupling of the first and second case halves forming the crankcase, whereby the assemblability of the valve operating mechanism can be improved.
摘要翻译：曲轴箱包括第一和第二壳体半部，它们在与第一和第二轴承部分的轴线倾斜相交的分型平面处彼此联接。气缸筒和第一轴承部分通过一体地模制在第一壳体半部上以形成发动机缸体而形成。第二轴承部分通过一体地模制在第二壳体半部上并且侧盖联接到发动机缸体的外侧表面以形成用于容纳阀操作机构的气门操作室。因此，可以减小用于支撑曲轴的相对端的第一和第二轴承部分之间的距离，而不受阀操作机构的干扰，从而提高曲轴的耐久性。在形成曲轴箱的第一和第二半壳体的联接之后，可以组装阀操作机构，从而可以提高阀操作机构的组装性。

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