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41. 发明专利

JP2789073B2 失效
公开(公告)号：JP2789073B2
公开(公告)日：1998-08-20
申请号：JP15136893
申请日：1993-05-28
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAGAHAMA MASAHIRO , YOSHIDA KOZO
IPC分类号： F02D1/02 , F02B3/06 , F02M59/44

42. 发明专利

JPH10148137A CENTRIFUGAL GOVERNOR FOR DIESEL ENGINE 失效
公开(公告)号：JPH10148137A
公开(公告)日：1998-06-02
申请号：JP30780896
申请日：1996-11-19
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAGAHAMA MASAHIRO , NAKAMURA TATSUYUKI , UMEDA YUZO , MANBA SHUNICHI , NAITO KEITA , YOSHIDA KOZO
IPC分类号： F02D1/04 , F02D31/00
摘要： PROBLEM TO BE SOLVED: To reduce wear of the abutting part of a governor weight, and eliminate the abuse of increasing the difference between governors. SOLUTION: A governor lever 10 is swingably pivoted on a supporting shaft 12 of oscillation, a roller 5 is provided on the governor lever 10 so that it can freely roll, and a governor sleeve 4 is structured to abut on the roller 5 by governor force G of a governor weight 3 to oscillate the governor lever 10 to the side in which the quantity of fuel is reduced. At least either of the abutting faces of the roller 5 and the governor sleeve 4 is machined to be curved face, and thus the roller 5 and the governor sleeve 4 are structured to abut on each other in state where they are in contact with each other at thick point.

43. 发明专利

JPH0996249A THRUST PREVENTING DEVICE FOR ROTARY SHAFT OF ENGINE 失效
公开(公告)号：JPH0996249A
公开(公告)日：1997-04-08
申请号：JP25589495
申请日：1995-10-03
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , YOSHIDA KOZO
IPC分类号： F02B67/04 , F01L1/04 , F01M1/06 , F01P11/08 , F02B77/00 , F02F7/00 , F02M39/02
摘要： PROBLEM TO BE SOLVED: To reduce a cost by eliminating a thrust regulating ring, and decreasing a number of part items. SOLUTION: A shat support hole 3 is provided in a front wall 1a of an engine main unit 1, a rotary shaft 10 is journalled to this support hole 3, also a tip end part 11 of the rotary shaft 10 is protruded from the support hole 3, and a transmission gear 8 formed by a helical gear is fixedly provided in the tip end part 11. A rear boss part 8b of the transmission gear 8 is brought into contact with the front wall 1a of the engine main unit 1, a facing boss part 21 formed in a gear case 20 is brought into contact with a front boss part 8a of the transmission gear 8, so as to constitute a thrust regulating means, and thrust movement of the rotary shaft 10 is regulated.

44. 发明专利

JPH08312322A FORCIBLE LUBRICATING TYPE ENGINE 失效
公开(公告)号：JPH08312322A
公开(公告)日：1996-11-26
申请号：JP11668395
申请日：1995-05-16
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAGAHAMA MASAHIRO , UMEDA YUZO , MANBA SHUNICHI , YOSHIDA KOZO
IPC分类号： F01M1/02 , F01M1/06 , F01M11/02 , F02F7/00
摘要： PURPOSE: To control noises due to an oil impact wave by interconnecting the opening part of a side wall inner passage opened in the front of a crankcase front wall and the opening part of a pump entrance passage opened in a gear case peripheral surface through a connecting tube bent in a circular-arc form. CONSTITUTION: A gear case 2 is fitted to a crankcase front wall 1, an oil pump 3 is provided in this gear case 2 and a side wall inner passage 6 is formed by a hole directed from the front face 4 of the crankcase front wall 1 to a rear side in a crankcase side wall 5. A pump entrance passage 8 is formed by a hole directed from a gear case peripheral surface 7 to the oil pump 3 in the gear case 2. The opening part of the side wall inner passage 6 and the opening part of the pump entrance passage 8 are interconnected by a connecting tube 9 bent in a circular-arc form. Thus, noises due to an oil shock wave is suppressed.

45. 发明专利

JPH07233738A TORQUE-UP DEVICE FOR CENTRIFUGAL GOVERNOR OF DIESEL ENGINE 失效
公开(公告)号：JPH07233738A
公开(公告)日：1995-09-05
申请号：JP2417294
申请日：1994-02-22
申请人： KUBOTA KK
发明人： SHIRAISHI YASUNORI , YAMASHITA KENJI , SASAKI SHINJI , YAMADA SHUICHI , KUSHISHITAMACHI SHINICHI
IPC分类号： F02D1/02 , F02B3/06 , F02D1/04
摘要： PURPOSE:To prevent an engine stall, and to prevent the generation of smoke in an overload operation area of an engine by accurately metering-controlling a lack pin at the torque-up position. CONSTITUTION:An intermediate lever 1c is provided between a weight side lever 1a and a spring side lever 1b of a centrifugal governor G. A torque-up device 10 is provided with a cylindrical case main body 11 fixed to the intermediate lever 1c, a torque pin 12 projected from the tip of the cylindrical case main body 11 freely to go forward/backward, a torque spring 13 for pushing to energize a base end flange part 12a of the torque pin 12, and a lever receiver 14 for receiving the intermediate lever 1c. Length of the torque pin 12 is set larger than the torque-up metering area Lb, and the lever receiver 14 is moved in advance/retreat for adjustment to adjust the projection quantity lambda of the torque pin 12.

46. 发明专利

JPH06346791A HEAD COVER SEALING DEVICE FOR OVERHEAD VALVE ENGINE 失效
公开(公告)号：JPH06346791A
公开(公告)日：1994-12-20
申请号：JP16019693
申请日：1993-06-04
申请人： KUBOTA KK
发明人： NAGAHAMA MASAHIRO , UMEDA YUZO , NAKAMURA TATSUYUKI , YOSHIDA KOZO , MIYAZAKI HIDEYA , MANBA SHUNICHI , YAMASHITA KENJI
IPC分类号： F02F7/00 , F02F1/24 , F02F11/00
摘要： PURPOSE:To suppress vibration from a cylinder head and noise to the outside of a head cover and to simplify sealing operation. CONSTITUTION:A head cover 2 is installed in a cylinder head 1 via a sealing member 3 so as to be sealed oiltightly. A laminated damping plate 7, which is formed by coating a hard plate by an elastic material, is installed as a sealing member 3. In this way, vibration from the cylinder head 1 is mainly damped by the elastic material, so that noise leaking from the cylinder head 1 to the outside of the head cover 2 through a rocker arm chamber can be reduced mainly by the hard plate. Because of a form maintaining property of the hard plate, sealing operation of the damping plate 7 is facilitated.

47. 发明专利

JPH0658222A FUEL LIMIT POSITION MANAGEMENT FIXTURE FOR FUEL INJECTION PUMP IN DIESEL ENGINE 失效
公开(公告)号：JPH0658222A
公开(公告)日：1994-03-01
申请号：JP23314192
申请日：1992-08-07
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , YAMADA SHUICHI , FUJII SATOSHI , YOSHIDA KOZO , SHINOHARA YUJI
IPC分类号： F02M59/28 , F02B3/06 , F02D1/04 , F02M59/44
摘要： PURPOSE:To utilize an engine without dislocating a fuel limit position of an adjustment rack from a proper position by installing a rack pin corresponding part on an installation flange corresponding part such that the relative position between them is agreed with that between an installation flange and a rack pin. CONSTITUTION:There are provided an installation flange corresponding part 6 which corresponds to an installation flange 5 of a fuel injection pump 2, and a rack pin corresponding part 8 which corresponds to a rack pin 7 of the fuel injection pump 2. The rack pin corresponding part 8 is provided on the installation flange corresponding part 6 such that a position of the rack pin corresponding part 8 in respect to the installation flange corresponding part 6 agrees with a position of the rack pin 7 in respect to the installation flange 5 at a fuel limit position 4. It is thus possible to prevent the fuel limit position of an adjustment rack from dislocating from the original proper position in case that the fuel injection pump or a mechanical governor is detached, and assembled again.

48. 发明专利

JPH0571412A DRY LINEAR TYPE CYLINDER FOR ENGINE 失效
公开(公告)号：JPH0571412A
公开(公告)日：1993-03-23
申请号：JP26272591
申请日：1991-09-13
申请人： KUBOTA KK
发明人： YAMASHITA KENJI
IPC分类号： F02F1/08 , F02F1/10
摘要： PURPOSE:To prevent drop of sealing force of a gasket without increasing a manufacturing cost of an engine by inserting the upper end edge portion of a cylinder liner into a bore of the gasket, and locating the upper end edge of the cylinder liner in a position lower than the upper surface of the gasket. CONSTITUTION:A cylinder liner 2 inserted into a cylinder main body 1 is formed into a thin cylindrical shape. A main combustion chamber 18 is formed above a piston head 17 inside the cylinder liner 2. A cylinder head 3 is disposed above the cylinder main body 1 via a gasket 4, to be fixed by tightening a head bolt 5. The upper end edge portion 6 of the cylinder liner 2 is inserted into a bore 7 of the gasket 4, and the upper end edge 8 of the cylinder liner 2 is located in a position lower than the upper surface 9 of the gasket 4. In tightening the head bolt 5, a bore circumferential wall 10 of the gasket 4 is interposed between the cylinder head 3 and the cylinder main body 1, thus securing high sealing force.

49. 发明专利

JPH0441918A SIAMESE TYPE CYLINDER COOLING DEVICE OF LIQUID COOLED MULTI-CYLINDER ENGINE 失效
公开(公告)号：JPH0441918A
公开(公告)日：1992-02-12
申请号：JP14522190
申请日：1990-06-01
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAKAMURA TATSUYUKI , SASAKI SHINJI , TAKAHATA MASAO
IPC分类号： F01M1/08 , F01P3/02 , F01P3/08 , F01P3/20 , F02F1/10
摘要： PURPOSE:To suppress generation of scuffing and seizure by constituting a supply means of cooling oil so as to supply cooling oil at a portion facing a continuous wall part where two cylinders are integrally connected at the adjacent parts, on the sliding surface between a cylinder and a piston. CONSTITUTION:Cylinders of a multi-cylinder type engine 1 are formed as siamese type cylinders which ate integrally connected at the adjacent parts of the fore and aft cylinders 3 within water-cooled jacket 2, to constitute so as to supply cooling oil by means of a supply means of cooling oil 5 at the portion(as marked by xxx) facing a continuous wall part 6 where two cylinders are integrally connected at the adjacent parts on the sliding surface between a cylinder and a piston. The supply means of cooling oil 5 is constituted so as to form an oil passage 9 and an ejection port 10 at a bearing 8 of a crankshaft 7, to pressure-feed the oil within an oil pan to the oil passage 9 through a circulating pump, etc., (not shown in the figure), and to eject the cooling oil toward the part facing the continuous wall part 6 from the ejection port 10.

50. 发明专利

JPH03182672A CYLINDER LINER-FILLED CYLINDER BLOCK MADE OF ALUMINUM ALLOY FOR ENGINE 失效
公开(公告)号：JPH03182672A
公开(公告)日：1991-08-08
申请号：JP32015889
申请日：1989-12-08
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAKAMURA TATSUYUKI , SASAKI SHINJI
IPC分类号： F02F1/00
摘要： PURPOSE:To decrease the thickness of a cylinder liner by a method wherein a thick section part for reinforcement is formed to the end part on the top dead center side of a cylinder liner in a state to be protruded toward the outer diameter side, height is increased to a value higher than the depth of a screw hole, and a screw hole is formed in a wall thickness part located near the liner. CONSTITUTION:A thick section part 8 for reinforcement is integrally formed to an end part 7 on the top dead center side of a cylinder liner 3 in a state to be protruded toward the outer diameter side. A height H is set to a value approximately 1.5 times as large as a depth (h) of a screw hole 6 for a head bolt. A wall thickness part 5 for forming a screw hole located in a position near the exterior of a cylinder block 1 is formed integrally with a cylinder body 2 located near the interior of the cylinder block 1, and the screw hole 6 is formed in the wall thickness part 5 in a position near the cylinder liner 3. Thus, since the cylinder liner 3 is formed such that only an end part 7 on the top dead center side forms the trick section part 8, other portion can be decreased in thickness, resulting in the decrease of weight.

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