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21. 发明专利

JPS57203857A OPERATION DETECTING DEVICE FOR FUEL INJECTION SYSTEM 失效
公开(公告)号：JPS57203857A
公开(公告)日：1982-12-14
申请号：JP8735681
申请日：1981-06-05
申请人： HITACHI SHIPBUILDING ENG CO
发明人： NAKANO TERUO , OOBA KOUZOU , NAGAI SUSUMU , MIZUSHIMA KAZUSUKE , KAWASAKI TADASHI
IPC分类号： F02M65/00 , F02D41/24
摘要： PURPOSE:To permit to detect the discharging timing as well as the opening and closing timings of a fuel injection valve by a method wherein an analog circuit capable of processing the signals of the fuel injection system, which are varying rapidly, is constituted to process and control the signals by an electronic computer and analyze the output thereof. CONSTITUTION:In case a predetermined signal wave form is obtained from two acceleration sensors attached to the outlet of a fuel pump and the fuel injection valve respectively, the detecting signals of each sensors are inputted into first and second input terminals 18, 191-196, and the signal of the input terminal is fed to a feature extraction filter 25a through an amplifier 23a or to the feature extraction filter 25b through a changeover switch 34. The signals of the input terminals 191-196 are fed to the feature extraction filters 25b, 25c through a multiplexer 20 and the amplifier 23b. The signals, passed through the respective filters 25a-25c are fed to envelope detecting circuits 39a-39c through a level converting amplifier 27a-27c and absolute value circuits 29a-29c while the operating conditions of the injection valve or the like are detected in a CPU40 from the outputs thereof.

22. 发明专利

JPS57188729A COMPRESSION PRESSURE DETECTING METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS57188729A
公开(公告)日：1982-11-19
申请号：JP6181981
申请日：1981-04-22
申请人： HITACHI SHIPBUILDING ENG CO
发明人： NAGAI SUSUMU , MIZUSHIMA ICHISUKE , KAWASAKI TADASHI , NAKANO TERUO , OOBA KOUZOU
IPC分类号： F02B77/08 , G01L23/00 , G01L23/08
摘要： PURPOSE:To diagnose the abnormality of an engine by detecting the variation of the compressing pressure of an internal combustion engine from the variation of the load current when cranking the starter motor for the engine thereby detecting the compressing pressure without fixing a pressure sensor. CONSTITUTION:The load current variation when cranking a starter motor for an internal combustion engine is measured. The compressing pressure is detected from the ratio P/Po where Po is the peak load current during one cycle of the engine 1 or the peak amplitude of the load current under the normal state of engine while P is the peak amplitude of the load current under the abnormal state. In such a manner the abnormality of the compressing pressure can be detected easily thereby the breaking of a piston ring, incorrect head gap of the supply/exhaust valve and the break-down of the piston and the cylinder head can be detected.

23. 发明专利

JPS5529054A DETECTING METHOD FOR SCARFING AND SCARFING DETECTOR 失效
公开(公告)号：JPS5529054A
公开(公告)日：1980-03-01
申请号：JP10198178
申请日：1978-08-21
申请人： HITACHI SHIPBUILDING ENG CO , NIPPON ZOUSEN KENKIYUU KIYOUKA
发明人： NAGAI SUSUMU , HIRANO SHINSAKU , AKANE HARUO , SUMITA MITSUHIRO , OGINO SHIYOUICHI , KAWASAKI TADASHI
IPC分类号： G01M15/04 , F02B77/08 , F02D45/00 , G01H17/00 , G01N19/08
摘要： PURPOSE:To detect scarfing of seizing phenomenon in such a way that vibrating signals generated at the piston are skirt converted to abnormal vibrating signals at the piston topland or piston ring by introducing them into a gate circuit and a comparator. CONSTITUTION:An accelerometer, such as a vibrometer 2 is installed at the lower part of a cylinder liner 1, vibration is detected at the piston skirt part. Observation of its output signals through an amplifier 3 at an oscilloscope 4 coincides with selection of abnormal signals at the piston topland or piston ring by a gate circuit 5. And its output signals are made level display by a level indicator 11 through a reliability improving circuit 6 to eliminate noise, are compared with a settled value by a comparator 12, when the difference comes up beyond the constancy, an alarm device 13 gives alert on the ground that it is in the scarfing condition.

24. 发明专利

JPS53131317A SCUFFING DETECTOR 失效
公开(公告)号：JPS53131317A
公开(公告)日：1978-11-16
申请号：JP3310277
申请日：1977-03-24
申请人： HITACHI SHIPBUILDING ENG CO , NIPPON ZOUSEN KENKIYUU KIYOUKA
发明人： NAGAI SUSUMU , HIRANO SHINSAKU , AKANE HARUO , SUMITA MITSUHIRO , MIZUUCHI MITSURU , OGINO SHIYOUICHI , KAWASAKI TADASHI
IPC分类号： F02F1/18 , F02B77/08 , F02F3/00 , F02F5/00
摘要： PURPOSE:To provide a scuffing detector which can accurately detect a scuffing phenomenon, that is, a seizure of a cylinder liner to a piston or to a piston ring of an engine by constituting same such that the wave form of vibrations appearing to the engine is identified in order to detect such scuffing.

25. 发明专利

JP2001039382A INTERMEDIATE SHAFT CENTERING DEVICE FOR MARINE ENGINE 失效
公开(公告)号：JP2001039382A
公开(公告)日：2001-02-13
申请号：JP21604699
申请日：1999-07-30
申请人： HITACHI SHIPBUILDING ENG CO
发明人： SUGIMOTO ITSUO , BABA SHINJI , ASHIDA SATOSHI , KAWASAKI TADASHI
IPC分类号： B63B9/00 , B63H23/32
摘要： PROBLEM TO BE SOLVED: To prolong the lifetime of a bearing by preventing ueven working of an intermediate shaft on a bearing. SOLUTION: In order to adjust the inclination of an intermediate shaft between a diesel engine and a propeller driving shaft, a bearing elevation driving device 21 for supporting an engine-outside bearing for the intermediate shaft freely to be elevated and an intermediate shaft centering control device 41 for driving this bearing elevation driving device 21 are provided. This intermediate shaft centering control device 41 is provided with an engine temperature height computing unit 51 for computing quantity of a change of the relative height of an engine-inside bearing in relation to a stern tube bearing on the basis of the data of engine-inside temperature, engine-outside temperature, height of the intermediate shaft and thermal expansion and a load height computing unit 61 for computing quantity of a change of the relative height of the engine side bearing in relation to the stern tube bearing on the basis of the data of bow side draft depth, stern side draft depth, distance of the intermediate shaft, and the rigidity in the bow and stern direction.

26. 发明专利

JP2001027507A BEARING GAP MEASURING DEVICE 失效
公开(公告)号：JP2001027507A
公开(公告)日：2001-01-30
申请号：JP19968699
申请日：1999-07-14
申请人： HITACHI SHIPBUILDING ENG CO
发明人： SUGIMOTO ITSUO , KAWASAKI TADASHI
IPC分类号： G01B7/14 , G01B7/00
摘要： PROBLEM TO BE SOLVED: To provide a bearing gap measuring device capable of exactly measuring the whole circle of a bearing gap and controlling the proper gap of the bearing. SOLUTION: On the outer surface of a crank shaft 20 facing a bearing cylinder 26, a first and a second displacement sensors 21A and 21B of eddy current type attached to the two symmetric measuring positions of the center of the crank shaft 20 for detecting the bearing gap with magnetic field, a rotary encoder for detecting the rotational angle of the crank shaft 20, a measuring body operating the detected value of bearing gaps ΔA and ΔB of the displacement sensors 21A and 21B to the crank angle obtained from the rotary encoder for whole circle and a display for indicating the measured value obtained with this measuring body are provided. The device is constituted to indicate the cross sectional shape of the shaft cylinder 26 on the display by rotating the rotational shaft by 180 degrees and measuring the bearing gaps ΔA and ΔB for whole circle.

27. 发明专利

JPH07158532A NOX REDUCING METHOD IN DIESEL ENGINE AND FUEL INJECTION VALVE FOR THIS PURPOSE 失效
公开(公告)号：JPH07158532A
公开(公告)日：1995-06-20
申请号：JP30995293
申请日：1993-12-10
申请人： HITACHI SHIPBUILDING ENG CO
发明人： KAWASAKI TADASHI , BABA SHINJI
IPC分类号： F02B47/02 , F02B3/06 , F02M25/022 , F02M43/00 , F02M43/04
摘要： PURPOSE:To inject a fuel oil and the water separately, and to stabilize the combustion as well as to improve the ignition property, so as to improve the combustion efficiency. CONSTITUTION:In an injection valve main body 1, a fuel injection chamber 12 opened and closed by a spindle 16 for fuel injection as well as a fuel is fed is formed. In the fuel injection chamber 12, a spindle 17 for water injection in which a water feeding passage 17a is formed is provided slidable, and at the same time, a water injection chamber 13 formed at the front end of the water feeding passage 17a is made to open and close freely by the above sliding, a fuel injection hole 3 communicated to the fuel injection chamber 12 is provided, and a water injection hole 4 communicated to the water injection chamber 13 is also provided. Consequently, the opening direction of the water injection hole 4 is set in the direction to face to the direction of the high temperature region of a combustion flame.

28. 发明专利

JPS6213553B2 失效
公开(公告)号：JPS6213553B2
公开(公告)日：1987-03-27
申请号：JP6370782
申请日：1982-04-15
申请人： HITACHI SHIPBUILDING ENG CO
发明人： TOMOKYO OSAMU , KAWASAKI TADASHI , ASADA CHUKEI
IPC分类号： H01F7/18 , F16K31/02 , F16K31/06

29. 发明专利

JPS58170836A CONTROL DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPS58170836A
公开(公告)日：1983-10-07
申请号：JP5451782
申请日：1982-03-31
申请人： HITACHI SHIPBUILDING ENG CO
发明人： TOMOKIYO OSAMU , ASADA CHIYUUKEI , KAWASAKI TADASHI
IPC分类号： F02D41/04 , F02B3/06 , F02D13/02 , F02D41/02
摘要： PURPOSE:To reduce a fuel consumption rate, by providing an arithmetic control circuit adapted to control opening/closing timing of a plurality of control valves for a Diesel engine, and by driving the valve to open and close respectively in response to the valve opening/closing instruction signals read out correspondingly to a rotation angle detected. CONSTITUTION:A signal indicating a revolution angle of crankshaft 7 of a Diesel engine 1 is input to an electronic control circuit 10 and a F/V converter 11 via an encoder 8, while a signal indicating various engine operating conditions is input to a central processing unit (CPU) 14 via an A/D converter 12. The CPU 14 computes optimum opening/closing timings for an intake and exhaust valves 4a and 6a, a fuel valve 5a and the like, a signal preset for every revolution angle is written to a memory of control circuit 10 and the preset signal thus stored is read out to send a signal instructive of opening/closing drivings of each control valve, correspondingly to a signal indicating a detected revolution angle. In this manner, the valves are controlled to open and close at optimum timings, thereby reducing a fuel consumption rate.

30. 发明专利

JPS588263A DETECTING METHOD OF OPERATIONAL CONDITION IN FUEL INJECTION SYSTEM 失效
公开(公告)号：JPS588263A
公开(公告)日：1983-01-18
申请号：JP10582181
申请日：1981-07-06
申请人： HITACHI SHIPBUILDING ENG CO
发明人： NAGAI SUSUMU , MIZUSHIMA KAZUHIRO , KAWASAKI TADASHI , NAKANO TERUO , OOBA KOUZOU
IPC分类号： F02M65/00 , F02D41/34
摘要： PURPOSE:To surely detect abnormality in a short time, by mounting a vibration or sound detector sensor to an injection system and comparing a generation timing or mutual relation of peak signal output from said sensor with preobtained standard value. CONSTITUTION:A vibration or sound detector sensor 12 is mounted to the outside of a fuel injection system under test, and its deteted output signal is applied to a computer 29 through an amplifier 20, feature abstracting filter 22, level conversion amplifier 24, absolute value circuit 26 and envelope detection circuit 27. Further a signal, contained with a peak signal corresponding to an operational condition in the injection system, is abstracted from the feature abstracting filter 22. Then in the computer 29, generation timing of the peak signal or relation mutually between the prescribed peak signals is compared with that in case of a standard fuel injection system stored to a memory 31, to decide the operational condition. A decision result is displayed as necessary to a display device 32.

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