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公开(公告)号：US20210388754A1
公开(公告)日：2021-12-16
申请号：US17282904
申请日：2019-09-09
申请人： KUBOTA Corporation
发明人： Hideyuki KOYAMA , Mitsugu OKUDA , Yuji SHINOHARA , Mitsuru KAMIYAMA , Hiroki OSO
摘要： An electronic fuel injection type diesel engine enables reduction in engine size. The electronic fuel injection type diesel engine is provided with: a combustion chamber inside a cylinder; a fuel injection chamber inside a cylinder head; a fuel injector that injects liquid fuel into the fuel injection chamber; a fuel accumulation unit that accumulates the liquid fuel injected from the fuel injector; and an electronic control unit that controls a timing and an amount of injection of the liquid fuel.
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公开(公告)号：US20180003093A1
公开(公告)日：2018-01-04
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：US20190186386A1
公开(公告)日：2019-06-20
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：US20160312739A1
公开(公告)日：2016-10-27
申请号：US15134470
申请日：2016-04-21
申请人： KUBOTA Corporation
发明人： Hiroki OSO , Hideyuki KOYAMA , Manabu MIYAZAKI , Hideyuki GOTO , Takahito HAMASAKI , Takahiro YAMAZAKI
CPC分类号： F02F3/10 , F02F3/00 , F02F3/0084 , F02F3/027 , F05C2253/12 , F05C2253/20 , F16J1/02 , F16J1/08
摘要： A piston for an engine includes a skirt part, and a resin coating film and a recess formed on a surface of the skirt part. A plurality of the resin coating films are discretely arranged in spots on the surface of the skirt part, and a mesh-like groove is formed by the recess provided between the resin coating films. The recess formed on the skirt part between the resin coating films adjacent to each other in a piston circumference direction is set to be adjacent to another resin coating film in a piston moving direction. An end part of the resin coating film in the piston moving direction is formed in a concave shape when seen in a piston radius direction.
摘要翻译： 用于发动机的活塞包括裙部，树脂涂膜和形成在裙部的表面上的凹部。 多个树脂涂膜在裙部的表面上离散地布置成点状，并且通过设置在树脂涂膜之间的凹部形成网状凹槽。 在活塞周向彼此相邻的树脂涂膜之间的裙部上形成的凹部被设定为与活塞移动方向上的另一树脂涂膜相邻。 当在活塞半径方向上观察时，活塞移动方向上的树脂涂膜的端部形成为凹形。
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5.发明公开公开(公告)号：US20240254940A1
公开(公告)日：2024-08-01
申请号：US18565224
申请日：2022-02-21
申请人： KUBOTA CORPORATION
发明人： Yasushi KOBAYASHI , Hiroki OSO , Kiichi SUEHIRO , Yuki TAGASHIRA , Koji NAKAKITA
CPC分类号： F02D41/406 , F02D2041/2058
摘要： A diesel engine 30 includes an injector 4 that uses a solenoid to directly drive a needle valve and inject a fuel and an injector control device 2 that controls the driving by the injector 4. The injector control device 2 includes a charge voltage control circuit 22, a storage unit 25 that stores a correction value related to an injection amount of the fuel injected from the injector 4, and an injector control circuit 24 that controls the driving by the injector 4 on the basis of each of a voltage supplied from the charge voltage control circuit 22 and the correction value stored in the storage unit 25. The correction value is set according to a voltage applied to a terminal of the injector control device 2 connected to a load when a current starts to flow in the load connected to the injector control device 2.
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公开(公告)号：US20200340388A1
公开(公告)日：2020-10-29
申请号：US16857245
申请日：2020-04-24
申请人： KUBOTA Corporation
摘要： Provided is an exhaust system for an engine in which a fastening force of a fastener hardly decreases. An exhaust system for an engine includes: an exhaust passage component of ferrous metal; and a fastener that fastens the exhaust passage component to other parts, the exhaust passage component including a pressure receiving surface that receives a fastening force of the fastener. The oxide film of triiron tetraoxide is formed on the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an outer surface other than the pressure receiving surface of the exhaust passage component. It is preferable that the oxide film of triiron tetraoxide be also formed on an inner surface of the exhaust passage component.
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公开(公告)号：US20180179984A1
公开(公告)日：2018-06-28
申请号：US15827670
申请日：2017-11-30
申请人： KUBOTA Corporation
发明人： Hiroki OSO , Takahiro YAMAZAKI , Hideyuki KOYAMA , Rina KANEKO , Yoshinori TANAKA , Takashi YAMAGUCHI , Akira TANAKA
CPC分类号： F02F1/10 , F01P3/02 , F01P11/04 , F01P2003/021 , F02F1/14 , F02F2001/106
摘要： A cooling structure of a water-cooled engine includes: a plurality of cylinders 2 arranged in a cylinder block 1; and a water jacket W formed around the plurality of cylinders 2. The water jacket W includes a pair of main flow paths 7, 8 formed in a state of extending in a cylinder arrangement direction outside the cylinders, and inter-bore flow paths 9, 10 formed between adjacent cylinders 2 in a state of connecting the pair of main flow paths 7, 8. Guide walls 11h, 13h, capable of guiding the cooling water flowing in the main flow paths 7, 8 to the inter-bore flow paths 9, 10, are formed in the cylinder block 1.
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公开(公告)号：US20240254953A1
公开(公告)日：2024-08-01
申请号：US18564235
申请日：2022-02-21
申请人： KUBOTA CORPORATION
发明人： Akira TAMURA , Hiroki OSO , Naotaro NAGAI , Shingo MATSUNOBU , Masanari TENNOMI
IPC分类号： F02M61/14
CPC分类号： F02M61/14 , F02M2200/40
摘要： An object of the present invention is to provide a fuel injection system capable of suppressing an occurrence of distortion in an injector during assembly of components. A fuel injection system (3) includes: a bracket (5) which is fixed to a cylinder head (21) of an engine (2); a fuel accumulator (6) which is supported by and fixed to the bracket (5) and which accumulates pressure of fuel supplied from a fuel pump; and an injector (7) which is directly connected to the fuel accumulator (6) and mounted to the cylinder head (21) and which injects the fuel, supplied from the fuel accumulator (6), into a combustion chamber. At least one of the fuel accumulator (6) and the bracket (5) has guide members (64, 513) which guide the injector (7) to a mount position on the cylinder head (21).
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公开(公告)号：US20240044283A1
公开(公告)日：2024-02-08
申请号：US18266586
申请日：2021-10-25
申请人： KUBOTA Corporation
发明人： Hiroki OSO , Yuki TAGASHIRA , Akira TAMURA , Rina KANEKO , Kiichi SUEHIRO
CPC分类号： F02B19/18 , F01P1/10 , F02M61/14 , F02F11/002
摘要： Provided is an electronic fuel injection type diesel engine capable of performing precise electronic fuel injection control. A fuel injector includes a main body portion having a large diameter, a nozzle portion having a small diameter, and a pressing surface formed at a step portion between the main body portion and the nozzle portion, in which the nozzle portion of the fuel injector is inserted from an inside of a sleeve into an inside of an insertion hole, the fuel injector is pressed toward a vortex chamber by a pressing force, and the pressing force applied to the fuel injector is received by a pressure receiving surface of the sleeve from the pressing surface of the fuel injector via the washer.
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公开(公告)号：US20230008602A1
公开(公告)日：2023-01-12
申请号：US17785528
申请日：2021-03-08
申请人： KUBOTA Corporation
发明人： Akira TAMURA , Kensuke FUJITA , Hiroki OSO , Yasushi KOBAYASHI , Shingo MATSUNOBU , Mitsugu OKUDA
摘要： To provide an engine head structure for “omission or shortening a fuel pipe that withstands a high pressure”, “simplification or omission of a support bracket for a fuel accumulator and/or a fuel injection device”, “reduction of the number of parts” by devising a fuel accumulator and a support structure therefor, and the like. An engine head structure has a support bracket for mounting a fuel accumulator including a joining portion with a fuel injection device on a cylinder head, is disposed on a side of the fuel injection device or between adjacent fuel injection devices. The support bracket includes a member having a mounting portion on which the fuel accumulator is placed and mounted, a mounting leg portion extending from the mounting portion and mounted on the cylinder head, and an aligning leg portion extending from the mounting portion for positioning the support bracket with respect to the cylinder head.
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