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公开(公告)号：US10669903B2
公开(公告)日：2020-06-02
申请号：US15618226
申请日：2017-06-09
申请人： KUBOTA Corporation
发明人： Hiroki Oso , Hideyuki Koyama , Hideyuki Goto , Takahiro Yamazaki , Kentaro Nagai , Takashi Yamaguchi , Rina Kaneko
摘要： An oil cooling structure of an engine is provided that is capable of enhancing cooling performance of oil while preventing an increase in number of components or an increase in required space from being involved as much as possible. In an oil cooling structure of an engine in which a transmission case is attached to one end wall of an engine body, and a transmission mechanism for an accessory drive is provided in the transmission case, the transmission case is formed into a potlid-shaped body having a plurality of rib walls along a front-rear direction, and is attached to an engine front wall with an engine cooling fan, and case inner chamber portions partitioned by the rib walls in the transmission case are configured as a transporting passage of oil circulated by an oil pump.
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公开(公告)号：US11306687B2
公开(公告)日：2022-04-19
申请号：US17096928
申请日：2020-11-12
申请人： KUBOTA Corporation
摘要： An engine exhaust manifold including exhaust inlet parts at four locations corresponding to a plurality of exhaust ports, one exhaust outlet part, and an exhaust confluence part to collect exhaust gas from each of the exhaust inlet parts and send to the exhaust outlet part. An EGR passage part to send EGR gas toward an intake passage is formed.
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公开(公告)号：US09429066B2
公开(公告)日：2016-08-30
申请号：US13954392
申请日：2013-07-30
申请人： KUBOTA Corporation
发明人： Hiroki Kuwayama , Takahiro Yamazaki , Yutaka Ishigaki , Hideyuki Koyama , Manabu Miyazaki , Katsunori Ikemachi , Yoshinori Tanaka
CPC分类号： F02B19/12 , F02B17/005 , F02B19/10 , F02B19/1009 , F02B19/14 , F02B19/18 , Y02T10/125
摘要： A subchamber type combustion chamber for a diesel engine, which reduces fuel consumption rate and combustion noise. To achieve the object, a subchamber type combustion chamber is communicated with a main combustion chamber through a nozzle hole, a fuel injection nozzle faces into the subchamber, and a glow plug extends into the subchamber. A heat generating portion of the glow plug includes a rod-shaped portion and a projecting portion projecting from an end of the rod-shaped portion. The projecting portion is provided with a convex curved surface projecting from a circular peripheral edge at the end of the rod-shaped portion while the convex curved surface is reduced in diameter. The percentage of value P/D obtained by dividing projection dimension P of the projecting portion from the end of the rod-shaped portion by diameter dimension D at the end of the rod-shaped portion is 3% to 23%.
摘要翻译： 用于柴油发动机的子舱型燃烧室，其降低燃料消耗率和燃烧噪声。 为了达到上述目的，一个小室型燃烧室通过喷嘴孔与主燃烧室连通，燃料喷嘴面向子室，电热塞延伸到子房中。 电热塞的发热部包括棒状部和从棒状部的端部突出的突出部。 突出部设置有从弯曲部的端部的圆周方向突出的凸曲面，而凸曲面的直径减小。 通过将棒状部分的端部的突出部分的突出尺寸P除以在杆状部分的端部处的直径尺寸D获得的值P / D的百分比为3％至23％。
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公开(公告)号：US10415443B2
公开(公告)日：2019-09-17
申请号：US15177444
申请日：2016-06-09
申请人： KUBOTA Corporation
发明人： Kentaro Nagai , Takahiro Yamazaki , Takahito Hamasaki , Hideyuki Goto , Hiroki Oso , Hideyuki Koyama , Akira Tanaka , Yoshinori Tanaka
摘要： There is provided an engine capable of reducing oil consumption. The engine includes a cylinder head, a cylinder head cover mounted above the cylinder head, a rocker arm covered by the cylinder head cover, and a breather chamber provided inside the cylinder head cover. As a front-rear direction is defined by a longitudinal direction of the cylinder head cover, the breather chamber has a blow-by gas inlet at one side in the front-rear direction, a blow-by gas outlet at another side in the front-rear direction, and an oil discharging guide chamber at an intermediate part in the front-rear direction. The blow-by gas inlet is opened on a bottom wall of the breather chamber, and a peripheral wall of the oil discharging guide chamber is protruded downwardly from the bottom wall of the breather chamber toward between the rocker arm provided at a side of the blow-by gas outlet and the blow-by gas inlet.
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公开(公告)号：US09828933B2
公开(公告)日：2017-11-28
申请号：US14633317
申请日：2015-02-27
申请人： KUBOTA Corporation
CPC分类号： F02F1/16 , F01P3/02 , F01P2003/021 , F02F1/10 , F02F1/14 , F02F2001/106
摘要： An engine cooler capable of suppressing a piston slap sound is provided. The engine cooler includes a cylinder block including a cylinder barrel and a water jacket, and a spacer stored in the water jacket, the water jacket surrounds the cylinder barrel, and the spacer encloses the cylinder barrel. Given that a width direction of the cylinder block is a lateral direction, a pressed member is pressed between the cylinder barrel and the spacer on lateral sides of the cylinder barrel, and a lower end of the pressed member is disposed above a lower end of each of right and left skirts of a piston located at a top dead center.
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公开(公告)号：US10815911B2
公开(公告)日：2020-10-27
申请号：US16205855
申请日：2018-11-30
申请人： KUBOTA Corporation
发明人： Akira Tanaka , Hiroki Oso , Yoshinori Tanaka , Hideyuki Koyama , Takahiro Yamazaki , Nobuyoshi Okada
摘要： There is provided an engine stopping device including a stopping solenoid, where an operating shaft, interlocked to a control rack of a fuel injection pump, is rotatably supported by an engine case in a pass-through manner. The control rack is forcibly movable to a stopping position by an action of the stopping solenoid on an operation arm provided for a projecting portion of the operating shaft in an integrally rotatable manner. An extending-retracting rod of the stopping solenoid and the operation arm are interlocked by fitting engagement between a pin provided for the extending-retracting rod and a cut-out portion of the operation arm. The cut-out portion is configured in a shape elongated along a direction perpendicular to a movement trajectory of the extending-retracting rod.
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公开(公告)号：US09027933B2
公开(公告)日：2015-05-12
申请号：US13760296
申请日：2013-02-06
申请人： KUBOTA Corporation
发明人： Hiroki Kuwayama , Takahiro Yamazaki , Yutaka Ishigaki , Hideyuki Koyama , Manabu Miyazaki , Yoshinori Tanaka , Keita Naito , Hidetaka Morinaga
摘要： An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (3), a first ring groove (4), a second land (5), a second ring groove (6), a third land (7), a third ring groove (8), and a piston skirt (9) formed on a piston peripheral wall (1) in the above-recited order from a side of a piston head (2). A first pressure ring (10) is fitted in the first ring groove (4). A second pressure ring (11) is fitted in the second ring groove (6), an oil ring (12) fitted in the third ring groove (8), and an indentation (13) is formed at the second land (5).
摘要翻译： 可以长时间稳定地降低油耗和窜气泄漏的发动机。 发动机包括第一平台（3），第一环槽（4），第二凸台（5），第二环槽（6），第三凸台（7），第三环槽（8）和 从活塞头（2）的一侧按照上述顺序形成在活塞周壁（1）上的活塞裙（9）。 第一压力环（10）装配在第一环形槽（4）中。 第二压力环（11）装配在第二环槽（6）中，装配在第三环槽（8）中的油环（12）和凹陷（13）形成在第二焊盘（5）处。
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公开(公告)号：US10941684B2
公开(公告)日：2021-03-09
申请号：US16683394
申请日：2019-11-14
申请人： KUBOTA Corporation
发明人： Kentaro Nagai , Takahiro Yamazaki , Reo Yoshida , Tomoya Akitomo , Shoichi Okimi
摘要： A cylinder head cover that prevents the gas outlet for the blow-by gas from being cooled by structural improvements so that the gas outlet does not freeze or become clogged in a cold condition. A cylinder head cover includes: a gas passage through which blow-by gas from a crankcase passes; and a gas outlet portion protruding upward from a head cover upper wall. The gas outlet portion includes a protruding case portion bulging upward from the head cover upper wall so as to form an outlet passage through which blow-by gas passes, and an air layer is formed outside the outlet passage in the protruding case portion.
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公开(公告)号：US10161353B2
公开(公告)日：2018-12-25
申请号：US15609195
申请日：2017-05-31
申请人： KUBOTA Corporation
发明人： Hiroki Oso , Hideyuki Koyama , Takahiro Yamazaki , Kentaro Nagai , Rina Kaneko
摘要： A piston for an engine is provided, that makes it possible to improve supply of engine oil to a recessed part thereof. The piston includes a resin coating film and a recessed part on a surface of a skirt part. In the piston, resin coating films are distributed in a patchy fashion on the surface of the skirt part. The recessed part is formed by the surface of the skirt part, between adjacent surfaces of the patchy resin coating films and by the adjacent resin coating films, forming a net-like groove. An outer-edge resin coating film, extending in a piston movement direction, is provided at the ends, in a piston circumferential direction of the skirt part.
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公开(公告)号：US10132215B2
公开(公告)日：2018-11-20
申请号：US14959174
申请日：2015-12-04
申请人： KUBOTA Corporation
发明人： Kentaro Nagai , Hideyuki Goto , Takahiro Yamazaki , Hiroki Oso
摘要： There is provided an engine lubricating device with which passage resistance of an oil strainer can be reduced and a support stay for an oil filter is unnecessary. An oil strainer includes an outer cylinder and an inner cylinder, the outer cylinder and the inner cylinder respectively have straight central axes and form inner and outer double cylinders, the outer cylinder has a strainer inlet at a lower end, the inner cylinder has a peripheral wall formed as a filter portion, the oil strainer is led out in an orientation inclined downward from the cylinder block toward an inner bottom portion of an oil pan, an upper end portion of the outer cylinder is fixed to a cylinder block, and an upper end opening portion of the inner cylinder communicates with an oil passage inlet of the cylinder block.
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