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1. 发明专利

JPH11174020A A/F SENSOR CONTROL CIRCUIT 失效
公开(公告)号：JPH11174020A
公开(公告)日：1999-07-02
申请号：JP34252297
申请日：1997-12-12
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： MINAMI NAOKI , NOTO YASUO , UENO SADAYASU
IPC分类号： G01N27/41 , F02D35/00 , F02D45/00 , G01N27/409 , G01N27/419
摘要： PROBLEM TO BE SOLVED: To control several kinds of A/F sensors by means of a single kind of control circuit by arranging a determination circuit determining a kind of an A/F sensor from an output of the A/F sensor. SOLUTION: When different microcomputers are used for an engine controlling microcomputer and for a sensor controlling microcomputer, a sensing cell driving voltage is computed by the microcomputer so as to be impressed to a terminal Rf. The current flowing in the terminal Rf becomes voltage between both ends of R1 so as to be inputted to an A/D converter via an amplifier. In the case of two cells, a terminal of a reference cell is connected to Pm, while a voltage applied to the terminal Rf is controlled so that the voltage of the terminal is kept constant. In the case of a single cell, because a reference cell and a sensing cell are the same, an amplifier is actuated on the basis of a signal of DO1 and a stop of high impedance is switched so that voltage impression and voltage input from the reference cell are carried out. In this case, the voltage of the reference cell is inputted to AD4. Dt represents a fixed voltage. A heater driver impresses voltage to the heater. A microcomputer controlling these apparatus outputs A/F data abnormal signal and the like to an engine control module.

2. 发明专利

JPH06265515A AIR FUEL RATIO SENSOR 失效
公开(公告)号：JPH06265515A
公开(公告)日：1994-09-22
申请号：JP5542693
申请日：1993-03-16
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SATO KANEMASA , UENO SADAYASU , OUCHI SHIRO , MINAMI NAOKI
IPC分类号： G01N27/409
摘要： PURPOSE:To reduce the number of parts of an assembly by attaching and fixing a heater via an inorganic substance to the inner surface of a cell composed of a sack tubular solid electrolyte of zirconia. CONSTITUTION:A cell 2 is mounted via a metallic packing 9 to a frame body 8. Moreover, an insulator 10 is installed. A heater 7 is directly bonded to the inner surface of the cell 2 by an inorganic adhesive material 14. The bonding angle in the vicinity of an activation part of the cell 2 is 30 deg. or smaller so as to secure an effective area for an inner electrode. The bonding angle at a part where the cell 2 is expanded wide is within 180 deg. so that the reference air is easy to reach the activation part of the cell 2 from inside and outside of a heater pipe. In the structure that the cell 2 of an air fuel ratio sensor is bonded to the heater 7, such an inorganic adhesive material 14 is selected that has a difference in the thermal expansion coefficient to the cell 2 and the heater 7 of approximately not larger than 1/10 / deg.C. Accordingly, the bonded part is prevented from being broken.

3. 发明专利

JPH0650934A APPARATUS AND METHOD FOR DETECTING AIR-FUEL RATIO FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0650934A
公开(公告)日：1994-02-25
申请号：JP13022493
申请日：1993-06-01
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , HASEGAWA NORIO , MINAMI NAOKI , SATO KANEMASA , OUCHI SHIRO , SASAYAMA TAKAO , SUZUKI KIYOMITSU
IPC分类号： F02D45/00 , G01N27/26 , G01N27/409 , G01N27/41 , G01N27/419
摘要： PURPOSE:To obtain the air-fuel-ratio detecting system for internal combustion engine, which indicates the high detecting accuracy for the long using period. CONSTITUTION:A diffusion-controlled type air-fuel ratio sensor 10, which is applied in an air-fuel-ratio control device for an internal combustion engine, is used in an air-fuel-ratio detecting apparatus. In this apparatus, an atmospheric-pressure correcting means 44, which corrects the signal processing and the output voltage signal processed in an output means based on the atmospheric-pressure change detected when the internal combustion engine satisfies the specified operating conditions, is introduced in addition to an atmosphere calibrating means 62 in signal outputting means. A time-change correcting means 46, which detects the electromotive-force change at the concentration cell part of the air-fuel-ratio sensor when the specified rich air-fuel ratio is reached and corrects the reference voltage of the air-fuel ratio sensor based on the detected change, is introduced. Therefore, the output of the air-fuel-ratio sensor is automatically corrected, and the high detecting accuracy is maintained for the long period.

4. 发明专利

JP2002374656A Controller for submersible apparatus motor 审中-公开
标题翻译：不可控制的电机控制器
公开(公告)号：JP2002374656A
公开(公告)日：2002-12-26
申请号：JP2001181016
申请日：2001-06-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WATANABE MASAHIKO , MORINAGA SHIGEKI , FUJII KENJIRO , HATSUMOTO SHINTARO , MINAMI NAOKI
IPC分类号： B63C11/00 , H02K11/00 , H05K7/20
摘要： PROBLEM TO BE SOLVED: To reduce the sizes of a controller of a submersible apparatus motor, in which heat generated by power switching elements can be dissipated efficiently to a pressure tight container. SOLUTION: Power switching elements 31a, 31b and 31c for motor control are arranged in parallel with the pressure tight container 1 of a submersible apparatus on a cooling heat sink which is fixed in contact with the pressure container of the submersible apparatus directly or indirectly. Since heat generated by the power switching elements of the controller for submersible apparatus motor can be cooled through the pressure container and local concentration of heat can be prevented in the heat sink, size of the controller for submersible apparatus motor can be reduced.
摘要翻译：要解决的问题：为了减小潜水设备电动机的控制器的尺寸，其中由电力开关元件产生的热能有效地散发到耐压容器。解决方案：用于电动机控制的电力开关元件31a，31b和31c与潜水装置的耐压容器1平行地布置在冷却散热器上，该冷却散热器直接或间接地与潜水装置的压力容器固定接触。由于用于潜水装置电动机的控制器的电力开关元件产生的热量可以通过压力容器冷却，并且可以防止散热器中的局部集中热量，因此可以降低潜水设备电动机的控制器的尺寸。

5. 发明专利

JP2002075148A PUFFER TYPE GAS-BLAST CIRCUIT BREAKER 失效
公开(公告)号：JP2002075148A
公开(公告)日：2002-03-15
申请号：JP2000263534
申请日：2000-08-31
申请人： HITACHI LTD
发明人： MINAMI NAOKI , TOKUYAMA SHUNJI , URAI HAJIME , OSHITA YOICHI , YANO MAKOTO
IPC分类号： H01H33/915 , H01H33/70
摘要： PROBLEM TO BE SOLVED: To provide a puffer type gas-blast circuit breaker, operating with low operating force and exerting proper shut-off performance, not only in the case of small current of several hundred amperes but also in the case of a large current of tens of thousands of amperes. SOLUTION: The puffer type gas-blast circuit breaker has a stationary arc contact, a movable arc contact brought into contact with/separated from the stationary arc contact, a first piston installed on the side of the movable arc contact and reciprocating relative to a first cylinder within the cylinder, a second piston coupled to the movable arc contact and reciprocating relative to a second cylinder within the cylinder, a hole for the first cylinder, which is formed in the first cylinder and enables the effluence of arc-extinguishing bas blown upon an arc generating part for generating an arc when the stationary arc contacts are opened and separated from each other, and a communication passage for allowing the arc generating part to communicating with the inside of the second cylinder. The circuit breaker is provided characteristically with a pressure response valve for opening/closing the communication passage, according to the gas pressure of the arc-generating part.

6. 发明专利

JP2001148314A TRANSFORMER 失效
公开(公告)号：JP2001148314A
公开(公告)日：2001-05-29
申请号：JP33237899
申请日：1999-11-24
申请人： HITACHI LTD
发明人： HAYASHI NORIYUKI , ONO YASUNORI , MINAMI NAOKI , TAKIZAWA ATSUSHI , KAJIWARA YUICHI
IPC分类号： H01F27/28 , H01F27/20 , H01F30/00
摘要： PROBLEM TO BE SOLVED: To provide a transformer having a winding cooling structure wherein effective cooling is performed by ensuring a flow rate necessary for cooling the respective horizontal ducts in the respective bent flow sections and avoiding local excessive temperature rise in a winding. SOLUTION: A plurality of bent flow sections 9 are formed by inserting bent flow plates 8 in the axial direction of a disk winding or a helical winding. In the bent flow sections 9, arrangement intervals of the bent flow plates 8 in the vicinity of the center of a winding part are so reduced that the number of windings 3 of the bent flow sections 9 in the vicinity of the central part of a winding part, i.e., the number of horizontal ducts 7 is made smaller than that of other bent flow sections 9, or a shunt plate and a double flow plate are arranged in the bent flow section 9 in the vicinity of the central part of the winding part.

7. 发明专利

JP2000224722A GAS INSULATING ELECTRICAL APPARATUS 失效
公开(公告)号：JP2000224722A
公开(公告)日：2000-08-11
申请号：JP2169999
申请日：1999-01-29
申请人： HITACHI LTD
发明人： MINAMI NAOKI , HAYASHI NORIYUKI , SHIRANE TAKASHI , UCHIUMI TOMOAKI
IPC分类号： H02B13/065 , H02B13/055
摘要： PROBLEM TO BE SOLVED: To prevent electric insulating gas from liquefying for preventing the lowering of dielectric strength by using CF3I for the electric insulating gas, and mounting, in a closed container, a means for heating the C3I up to such a temperature that the CF3I does not liquefy. SOLUTION: Closed containers and gas insulating transformers 12 of a breaker 1, disconnect switches 3a-3c, a bushing 4, a lightening arrester 5, and buses 6a-6g are filled with CF3I as insulating gas. The boiling point of CF3I is -22.5 deg.C and its saturation temperature is higher than that of SF6, therefore some measures should be taken when CF3I is used in a cold district or during wintertime. For example, for an oil-filled transformer, oil heated in a tank is passed through ducts 8a, 8b8, or the ducts 8a, 8b are brought into contact with the tank. The ducts 8a, 8b are brought into contact with the respective closed containers of buses 6a-6g, the lightening arrester 5, and bushing 4, and a blower 11 is mounted between the ducts 8a and 8b. CF3I gas is heated, thus it is possible to prevent CF3I from being liquefied by heating it, thereby preventing lowering of dielectric strength.

8. 发明专利

JPH07193913A MAGNETIC SHIELD FOR MAGNETIC LEVITATION TRAIN 失效
公开(公告)号：JPH07193913A
公开(公告)日：1995-07-28
申请号：JP33492793
申请日：1993-12-28
申请人： HITACHI LTD , TOKAI RYOKAKU TETSUDO KK
发明人： HAMADATE YOSHIO , SAITO TATSU , MINAMI NAOKI , SUGIMOTO KUNJI , HARA YOSHIO , INOUE AKIHIKO , HOSAKA SHIRO
IPC分类号： B61B13/08 , B60L13/04
摘要： PURPOSE:To obtain a light weight magnetic shield excellent in shielding by disposing a magnetic member having higher permeability and saturation magnetic flux density, as compared with other parts, between superconducting coils facing the opposite side parts at the end of a superconducting coil group in the advancing direction of vehicle. CONSTITUTION:A magnetic shield member 62 disposed inside a car body 11 comprises a U-shaped main magnetic shield plate 62a thin enough not to be saturated magnetically disposed on the floor of the car body 11 and the region under the side wall. Sub-magnetic shield plates 62b, 62c having higher permeability and saturation magnetic flux density than other parts are disposed in the regions proximate to superconducting coils 21a, 21c facing the superconducting coils on the other side disposed at the opposite ends in the advancing direction of the vehicle where the leakage flux and the flux density are high. Since a circuit for shunting most of leakage flux from the superconducting coils 21a, 21c to the sub-magnetic shield plates 62b, 62c is established, flux leakage into the vehicle can be reduced significantly.

9. 发明专利

JPH07174685A OIL DETERIORATION DIAGNOSIS DEVICE AND OIL CIRCULATION DEVICE EQUIPPED WITH IT 失效
公开(公告)号：JPH07174685A
公开(公告)日：1995-07-14
申请号：JP32008393
申请日：1993-12-20
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , OKAMOTO HIROYUKI , NAGAHORI MINORU , MINAMI NAOKI , HASEGAWA NORIO
IPC分类号： G01N11/16 , G01N33/30
摘要： PURPOSE:To accurately diagnose the degree of deterioration of lubrication oil and control oil. CONSTITUTION:A vibrator 10 is provided inside a lubrication oil and is vibrated by a self-excitation oscillation circuit 21. The temperature of the lubrication oil is measured by a temperature sensor 1. A comparator 36 for judging oil temperature judges whether the temperature measured by the temperature sensor 1 reaches 70 deg.C or not and then a comparator 39a for judging life judges whether the life of the lubrication oil has expired, according to whether the vibration frequency of the vibrator 10 reaches a predetermined life frequency.

10. 发明专利

JPH0545281A FUEL COMPONENT SENSOR 失效
公开(公告)号：JPH0545281A
公开(公告)日：1993-02-23
申请号：JP23076091
申请日：1991-08-19
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： NOGI TOSHIJI , YAMAGUCHI JUNICHI , OSUGA MINORU , OYAMA TAKASHIGE , UENO SADAYASU , MINAMI NAOKI
IPC分类号： F02D19/08 , F02D45/00 , F02M31/125 , G01N21/41
摘要： PURPOSE:To provide a fuel component sensor, which can sense accurately the methanol concentration over a wide operation range without causing drop of the sensing accuracy even though the fuel temp. has sunk and which permits performing the optimum control of an engine operable with any of methanol and gasoline or even a mixture thereof. CONSTITUTION:Part of light from a light emitting element 1 leaks into the fuel from a conductor 3, wherein the amount of leakage depends upon the refractivity of the fuel. Because methanol and gasoline have different refractivity, the methanol concentration in the currently used fuel can be sensed with the signal given by a light receiving element 2. An electric heater wire 5 is provided on the surface of a photo-conductor 3 to make temp. control so that no phase separation is generated in the fuel. Even though the fuel temp. has sunk, the temp. of the fuel around the photo-conductor 3 is kept at a temp. over a specified level to enable sensing of the methanol concentration over a wide operation range without causing drop of the sensing accuracy, and thus the engine concerned can be controlled properly.

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