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1. 发明专利

JP2929258B2 失效
公开(公告)号：JP2929258B2
公开(公告)日：1999-08-03
申请号：JP32068693
申请日：1993-12-21
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , YOSHIDA KOZO , YAMAMOTO TAKASHI
IPC分类号： F01M1/06 , F01P3/02 , F01P3/20 , F02F1/14 , F02F1/20

2. 发明专利

JPH10148138A CENTRIFUGAL GOVERNOR FOR DIESEL ENGINE 失效
公开(公告)号：JPH10148138A
公开(公告)日：1998-06-02
申请号：JP30780996
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： F01M1/06 , F02D1/04 , F02D31/00
摘要： PROBLEM TO BE SOLVED: To reduce wear of the abutting parts of governor weights to eliminate the evil effect of increasing the difference between governors. SOLUTION: A governor lever 10 is pivoted on an oscillating support shaft 12, and a governor sleeve 4 is allowed to abut on a roller by governor force G of governor weights 3 to oscillate the governor lever 10 to the side in which the quantity of fuel is reduced. A pressure feed oil path 14 for lubricating oil is formed in a gear case 13, and a lubricating oil path 15 is formed in a governor shaft 9. An oil inlet 15a to the lubricating oil path 15 is opened in one end face of the governor shaft 9, and oil outlets 16 branched from the lubricating oil path 15 are faced on and opened to the abutting parts 3a of the governor weights 3. An injection oil port 14a is opened in the pressure feed oil path 14 of the gear case 13, and the injection oil path 14a is faced on the oil inlet 15a opened to one end face of the governor shaft 9.

3. 发明专利

JPH09125922A VALVE GUIDE DEVICE FOR ENGINE 失效
公开(公告)号：JPH09125922A
公开(公告)日：1997-05-13
申请号：JP28823795
申请日：1995-11-07
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAGAHAMA MASAHIRO , NAKAMURA TATSUYUKI , UMEDA YUZO , IWAMOTO TORAO , MANBA SHUNICHI , YOSHIDA KOZO
IPC分类号： F01M9/10 , F01L3/08
摘要： PROBLEM TO BE SOLVED: To prevent a lubricating oil seal from being detached from a valve spindle guide by forming the lubricating oil seal into an annular type, further forming a circular groove on the internal surface of the guide hole of a valve spindle guide, and internally coupling the lubricating oil seal to the circular groove, regarding the structure where the lubricating oil seal is mounted on the valve spindle guide for passing a valve spindle. SOLUTION: The spindle 2 of the intake valve 1 of an overhead cam type engine is led through the guide hole 4 of a valve spindle guide 3, thereby keeping the valve head 5 of the intake valve 1 faced to a combustion chamber 6. Also, a valve spindle end 7 is projected to a valve system chamber 8. A lubricating oil seal 9 is mounted on the valve spindle guide 3 and a sealing part 10 is formed on the inner surface of the lubricating oil seal 9. Also, the sealing part 10 is kept in tight contact with valve spindle outer surface 11. The lubricating oil seal 9 is formed to be annular, and internally coupled to a circular groove 13 on the inner surface of the guide hole 4. As a result, a concern about the separation of the lubricating oil seal 9 from the valve spindle guide 3 is eliminated and the inflow of lubricating oil from the valve system chamber 8 to the combustion chamber 6 via the guide hole 4 is properly restrained with the sealing part 10.

4. 发明专利

JPH07233737A TORQUE-UP DEVICE FOR CENTRIFUGAL GOVERNOR OF DIESEL ENGINE 失效
公开(公告)号：JPH07233737A
公开(公告)日：1995-09-05
申请号：JP2417194
申请日：1994-02-22
申请人： KUBOTA KK
发明人： SHIRAISHI YASUNORI , YAMASHITA KENJI , SASAKI SHINJI , YAMADA SHUICHI
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:A torque-up device 10 is interposed between a spring side lever 1b and a machine wall 8 of a centrifugal governor. This torque-up device 10 is provided with a cylindrical case main body 11, a torque pin 12 projected from the tip of the cylindrical case main body 11 freely to go forward and backward, a torque spring 13 for pushing to energize a base end flange part 12a of the torque pin 12 to the projecting side, a spring receiver 15 for receiving the rear end of this torque spring 13, and a pin adjuster 14 passing through this spring receiver 15 and for receiving the base end flange part 12a of the torque pin 12. Length of the torque pin 12 is set larger than the torque-up metering area Lb, and the pin adjuster 14 is moved forward and backward for adjustment to adjust the going-forward/backward quantity lambda of the torque pin 12.

5. 发明专利

JPH07174044A COOLING DEVICE FOR CYLINDER BLOCK OF MULTICYLINDER ENGINE 失效
公开(公告)号：JPH07174044A
公开(公告)日：1995-07-11
申请号：JP32068693
申请日：1993-12-21
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , YOSHIDA KOZO , YAMAMOTO TAKASHI
IPC分类号： F01M1/06 , F01P3/02 , F01P3/20 , F02F1/14 , F02F1/20
摘要： PURPOSE:To prevent the deterioration of the cooling performance due to the clogging with foundry sand, chips, or water scale, in a narrow cooling water passage and prevent the deterioration of the sealing performance of a gasket. CONSTITUTION:A plurality of cylinder bores 13 are formed on the cylinder block 11 of a multicylinder engines E, and a cooling liquid passage 20 is formed on the cylinder wall between the contiguous cylinder bores 13 and 13. The cooling liquid passage 20 is allowed to communicate with the head bolt hole 19b of the cylinder block 11, and a lubricating oil passage 3 which communicates with a locker arm shaft 2 and the head bolt hole 19 of the cylinder head 10 are allowed to communicate through a communication pipe 5, and lubricating oil is allowed to flow in the cooling liquid passage 20 through the head bolt hole 19, and the head side part 15a of the cylinder wall 15 is cooled.

6. 发明专利

JPH07150979A ENGINE STOPPING DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPH07150979A
公开(公告)日：1995-06-13
申请号：JP29932093
申请日：1993-11-30
申请人： KUBOTA KK
发明人： YAMASHITA KENJI
IPC分类号： F02M37/00 , F02B3/06 , F02D1/02 , F02D17/00 , F02M59/44
摘要： PURPOSE:To provide an engine stopping device which can be executed at a low price by simple conversion. CONSTITUTION:This engine stopping device is constituted so that a fuel shutoff valve 20 is additionally provided on a fuel injection pump 3, and the fuel shutoff valve 20 is operated to stop an engine with an engine stop operation tool 13 to shut off fuel supply to the fuel injection pump 3. The fuel shutoff valve 20 is formed with a fuel supply port 22 and a fuel sucking out port 23 on a valve cylinder main body 21, and the port 22 and the port 23 are communicated to a cylinder chamber 24 formed in the valve cylinder main body 21 capably of being changed over. The fuel sucking out port 23 is communicated to the upper stream side oil feed passage 10a of a feed pump 10, and the fuel supply port 22 is communicated to the lower stream side oil feed passage 10b of the feed pump 10. The cylinder chamber 24 is communicated to the fuel reserving chamber 38 of the fuel injection pump 3 through a reserving chamber communicating passage 38a. The cylinder chamber 24 is provided with a piston valve 25 therein, and this device is constituted so that the fuel supply port 22 and the fuel sucking out port 23 are selectively opened/closed by means of the piston valve 25.

7. 发明专利

JPH04321728A FUEL HEATING DEVICE FOR FUEL INJECTION PUMP FOR DIESEL ENGINE 失效
公开(公告)号：JPH04321728A
公开(公告)日：1992-11-11
申请号：JP11679191
申请日：1991-04-19
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , ITO MASAHIRO , OKAMOTO KAZUTOSHI
IPC分类号： F02D1/02 , F02B3/06
摘要： PURPOSE:To raise the temperature of fuel just enough by defreezing gas oil frozen in the fuel injection pump at a cold time, raising the temperature accord ing to the temperature of the fuel injection pump. CONSTITUTION:It is constituted so that an electric heater 2 is provided along a fuel injection pump 1, the electric heater 2 is connected to a battery 4 through an electrification control device 6 and a heater switch 3, a temperature sensor 8 is provided on the fuel injection pump 1, and at detecting the temperature of the fuel injection pump 1 under the prescribed setting temperature with the temperature sensor 8, electrifying the electric heater 2 from the battery 4 is performed with the electrification control device 6, at detecting the temperature of the fuel injection pump 1 over the prescribed setting temperature, electrifying the electric heater 2 from the battery is stopped with the electrification control device 6.

8. 发明专利

JPH04237863A FUEL FEEDER FOR DIESEL ENGINE 失效
公开(公告)号：JPH04237863A
公开(公告)日：1992-08-26
申请号：JP1950991
申请日：1991-01-19
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , ITO MASAHIRO , OKAMOTO KAZUTOSHI
IPC分类号： F02M31/125 , F02B3/06 , F02M37/00
摘要： PURPOSE:To thaw the frozen fuel in the case where fuel is frozen in a part in a fuel feeder at cold climate, and thereby an engine fails to start. CONSTITUTION:A fuel return passage 5 of a fuel feeder is short-circuited to a fuel feed passage at a short passage 6. With short-circuiting, fuel is circulated around through those of short passage 6, fuel feed passage 2, fuel filter 3, fuel injection pump 4, fuel return passage 5 and short passage 6 in order, thus a short circulating passage 8 is formed in this way. Then, a temperature sensor 0, an electric heater 10 and an electric motor 11 are all installed in this short circulating passage 8, and when the detected temperature of this temperature sensor 9 is less than the setting temperature, the heater 10 and the pump 11 are operated via a control unit 12. Thus, the fuel is circulated around as heating it by means of electric control like this, through which frozen fuel is thawed. With this constitution, the frozen fuel is thawable earlier in a simple manner.

9. 发明专利

JPH03155448A METHOD FOR CASTING LINER CASTING TYPE ALUMINUM CYLINDER 失效
公开(公告)号：JPH03155448A
公开(公告)日：1991-07-03
申请号：JP29305289
申请日：1989-11-10
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAKAMURA TATSUYUKI , SASAKI SHINJI
IPC分类号： F02F1/00 , B22D19/08
摘要： PURPOSE:To prevent the development of casting defect by forming gap at contacting face part with a cylinder liner in a mold at inside of the cylinder liner and opening a pouring hole at upper side part corresponding to the inside of cylinder liner. CONSTITUTION:The cast iron-made cylinder liner 1 is fitted in the mold 2 and by pouring molten aluminum alloy, the cylinder is cast. The gap 3 for forming excess thickness is formed at the contacting face part with the cylinder liner 1 in the mold 2 positioned at the inside of cylinder liner 1. The pouring hole 5 for molten metal is opened at the upper side part corresponding to the inside of cylinder liner 1. The gap 3 for forming excess thickness is arranged over the whole circumference of cylinder liner 1. By this method, joining between the aluminum and the cast iron can be improved.

10. 发明专利

JPH03107517A BREATHER DEVICE OF ENGINE 失效
公开(公告)号：JPH03107517A
公开(公告)日：1991-05-07
申请号：JP24720489
申请日：1989-09-21
申请人： KUBOTA KK
发明人： YAMASHITA KENJI , NAKAMURA TATSUYUKI , SASAKI SHINJI
IPC分类号： B01D46/54 , F01M13/04 , F01P11/02 , F02B3/06
摘要： PURPOSE:To improve oil separation performance, in a device where a blowby gas outlet port is communicated with a crank chamber through an oil separation means, by providing the oil separation means with an oil separating membrane having a continuous passing clearance of a specified dimension. CONSTITUTION:Blowby gas 7 leaking through a sliding clearance between a cylinder 13 and a piston head 18 of a subsidiary combustion chamber type diesel engine 1 passes through a crank chamber, a pump housing, a lubricating oil return passage 20, a cam chamber 21, a blowby gas passage 22, an oil separating means 3 and a breather chamber 23 in sequence to return to a surge tank 10. The gas 7 is then returned into the cylinder 13, made innocuous by afterburning, and discharged outside the engine 1. In this case, the oil separating means 3 is formed of an oil separating membrane made of a semi-permeable membrane, and the dimension of a continuous passing clearance 6 in the thickness of the oil separating membrane 3 is determined so that the blowby gas 7 can pass through but the oil 8 can not.

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