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91. 发明专利

JP2000137017A GAS SENSOR ELEMENT 失效
公开(公告)号：JP2000137017A
公开(公告)日：2000-05-16
申请号：JP31233998
申请日：1998-11-02
申请人： NGK SPARK PLUG CO
发明人： SHIBATA MASAHIRO , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/406 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To generate electromotive force, only depending on a measuring objective component in measured gas, and to simplify structure to facilitate manufacturing. SOLUTION: A carbon dioxide gas sensor element 10 is provided with a base body 12 with a built-in surface heater 11, a gas permeable reference electrode 14 comprising gold fixed to a recess 13 of the base body 12, a solid electrolyte layer 15 fixed thereon, a sensing electrode 16 comprising gold fixed thereon, a gas permeable metal salt layer 17 comprising a metal carbonate fixed thereon, a seal part 18 comprising low melting temperature glass for sealing a gap between the base body 12 and the solid electrolyte 15, and 0.2 mm diam of through hole 19 for penetrating the recess 13 of the base body 12 to bring the reference electrode 14 into contact with the outside air. A boundary face between the reference electrode 14 and the solid electrolyte 15 is allowed to come into contact with measured gas via the through hole 19 and the gas permeable reference electrode 14.

92. 发明专利

JP2000121604A GAS SENSOR 失效
公开(公告)号：JP2000121604A
公开(公告)日：2000-04-28
申请号：JP29066298
申请日：1998-10-13
申请人： NGK SPARK PLUG CO
发明人： SUGAYA SATOSHI , ISHIDA NOBORU , NADANAMI NORIHIKO , YAMADA TETSUO , OSHIMA TAKAFUMI
IPC分类号： G01N27/41 , G01N27/416 , G01N27/419
摘要： PROBLEM TO BE SOLVED: To provide a gas sensor having pump cells of high oxygen-pumping ability provided with electrodes of high catalytic ability for a gas to be measured, and capable of accurately measuring the concentration of the gas. SOLUTION: This gas sensor is provided with a first pump cell 6 which has first internal and external electrodes 10, 11 formed on internal and external surfaces of a first passage 2 respectively, and pumps oxygen out/in from the first passage 2 through an oxygen ion conductor, and a second pump cell 8 which has second internal and external electrodes 14, 15 formed on internal and external surfaces of a second passage 4 respectively, and in which current generated by the reaction of a gas to be measured in the second passage 4 corresponding to the concentration of the gas to be measured carries, between the electrodes 14 and 15 through the oxygen ion conductor. As at least a part of the internal electrode 13 contains a platinum group element and Ag, its catalytic ability is high, thereby the reaction of the gas to be measured on the second internal electrode 13 is accelerated and stabilized to improve the accuracy of measurement.

93. 发明专利

JPH11190722A NOX GAS CONCENTRATION DETECTOR 失效
公开(公告)号：JPH11190722A
公开(公告)日：1999-07-13
申请号：JP36850597
申请日：1997-12-26
申请人： NGK SPARK PLUG CO
发明人： SUGAYA SATOSHI , OTSUKA TAKAYOSHI , NADANAMI NORIHIKO , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/419 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide an NOx gas concentration detector having a structure for accurately detecting an NOx gas concentration. SOLUTION: The NOx gas concentration detector comprises a first air gap part 2 to be introduced with a gas to be measured via a first diffused resistor 1, a second air gap part 4 to be introduced with a gas from the part 1 via a second diffused resistor 3, an oxygen concentration sensing electrode 7a provided oppositely to the part 4 to measure an oxygen concentration in the gas to be measured, a first oxygen ion pump cell 6 provided oppositely to the part 2 to pumping an oxygen from the part 2 based on a potential of the electrode 7a, and a second oxygen ion pump cell 8 provided oppositely to the part 4, applied with a predetermined voltage, controlled by the oxygen concentration by the cell 6 to decompose an NOx in the gas diffused in the part 4 and to pump the decomposed oxygen to supply a current corresponding to the NOx gas concentration.

94. 发明专利

JPH1123528A MEASURING METHOD AND MEASURING DEVICE FOR NITROGEN OXIDE CONCENTRATION 失效
公开(公告)号：JPH1123528A
公开(公告)日：1999-01-29
申请号：JP13772498
申请日：1998-05-01
申请人： NGK SPARK PLUG CO
发明人： ANDO MASAFUMI , ISHIDA NOBORU , SUGAYA SATOSHI , OSHIMA TAKAFUMI , NADANAMI NORIHIKO , OTSUKA TAKAYOSHI
IPC分类号： G01N27/419 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To make accurate measurement by applying a voltage to decompose a nitrogen oxide, moving the dissociated oxygen to obtain a current corresponding the nitrogen oxide concentration, and calculating the nitrogen oxide concentration obtained based on the current in response to the oxygen concentration in the detected gas. SOLUTION: The electromotive force corresponding to the oxygen concentration in the measured gas diffused and introduced into a first measurement chamber 2 is generated between the electrodes 7a, 7b of an oxygen concentration measuring cell 7. The excess oxygen is sucked, the measured gas with the constant oxygen concentration is diffused in a second measurement chamber 4, a voltage is applied to the electrodes 8a, 8b of a second oxygen ion pump cell 8, and the residual oxygen is further moved. NOx is decomposed into N2 and O2 by the catalyst action of the electrodes 8a, 8b, O2 is moved in the solid electrolyte layer of the second oxygen ion pump cell 8 as ions, and a second oxygen pump current corresponding to the decomposed nitrogen oxide concentration flows between the electrodes 8a, 8b. The nitrogen oxide concentration is calculated with the offset and gain of the nitrogen oxide concentration calculated in advance and the measured second oxygen pump current.

95. 发明专利

JPH10325825A CONCENTRATION DETECTOR FOR NITRIDE 失效
公开(公告)号：JPH10325825A
公开(公告)日：1998-12-08
申请号：JP8407098
申请日：1998-03-30
申请人： NGK SPARK PLUG CO
发明人： MIYATA SHIGERU , ANDO MASAFUMI , INAGAKI HIROSHI , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/419 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide a nitride concentration meter for detecting NOx concentration accurately through a simple circuit. SOLUTION: The NOx sensor comprises a first measuring chamber 20 conducting through a diffusion control layer to the side of gas being measured, and a second measuring chamber 26 conducting through diffusion limit layers 6d, 22d to the first measuring chamber 20. The quantity of oxygen flowing into the second measuring chamber 26 is controlled constant by controlling a first pump current IP1 such that the output from a Vs cell 6 is equal to a reference voltage VCO. The NOx concentration is detected from the detection signals VIP1, VIP2 of first and second pump currents IP1, IP2 by applying a constant voltage to a second pump cell 8 to decompose the NOx component in the second measuring chamber 26 and pumping oxygen. The electrode 6b on the first measuring chamber 20 side of the Vs cell 6 is formed on the circumferential fringe of the diffusion limit layer 6d or above the diffusion limit layer 6d. According to the arrangement, the quantity of oxygen flowing from the first measuring chamber 20 into the second measuring chamber 26 can be detected accurately and the NOx concentration can be detected from the VIP1, VIP2.

96. 发明专利

JPH10267892A METHOD FOR MEASURING CONCENTRATION OF SPECIFIC GAS IN GAS TO BE INSPECTED 失效
公开(公告)号：JPH10267892A
公开(公告)日：1998-10-09
申请号：JP9143297
申请日：1997-03-26
申请人： NGK SPARK PLUG CO
发明人： KIDA MASASHI , OTSUKA TAKAYOSHI , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/416
摘要： PROBLEM TO BE SOLVED: To measure the concentration of specific gas contained in a gas to be measured accurately to ppm unit without effected by concentration change in miscellaneous gas component even if such miscellaneous gas as steam is present in the gas. SOLUTION: A gas to be inspected is introduced into the first oxygen pumping cell 13 and the first oxygen concentration measurement cell 14, and the oxygen in the gas is taken out with the first oxygen pumping cell 13 based on the output of the first oxygen concentration measurement cell 14 so that the oxygen concentration in the introduced gas is to be a specified concentration. Then the to-be-inspected gas which is at specified oxygen concentration is introduced into the second oxygen pumping cell 15 and the second oxygen concentration measurement cell 16, and based on the output of the second oxygen concentration measurement cell 16, such current as the steam contained in the gas is resolved is supplied to the second oxygen pumping cell 15, and based on the current, a specific gas concentration in the gas is obtained.

97. 发明专利

JPH10221299A NOX GAS CONCENTRATION DETECTOR 失效
公开(公告)号：JPH10221299A
公开(公告)日：1998-08-21
申请号：JP34723297
申请日：1997-12-02
申请人： NGK SPARK PLUG CO
发明人： SUGAYA SATOSHI , NADANAMI NORIHIKO , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/416 , G01N27/419
摘要： PROBLEM TO BE SOLVED: To provide a NOx gas concentration detector which is less dependent upon temperature and oxygen concentration and which enables precise measurement of NOx concentration. SOLUTION: Through a diffusive resistance a gas to be measured is introduced to the first measuring chamber 2 from which the oxygen in the introduced gas is pumped out selectively, and the first oxygen ion pump cell 6 has two electrodes 6a and 6b one of which is formed on the side with the first chamber 2, wherein the ratio of the length of at least this electrode formed on the side with the first chamber 2 to the overall length of the first chamber 2 in the flowing direction of the gas in the chamber 2 should be (electrode/overall length) = 1/4 thru 3/4.

98. 发明专利

JPH10177008A NOX GAS CONCENTRATION DETECTOR 失效
公开(公告)号：JPH10177008A
公开(公告)日：1998-06-30
申请号：JP35413596
申请日：1996-12-18
申请人： NGK SPARK PLUG CO
发明人： NADANAMI NORIHIKO , SUGAYA SATOSHI , ANDO MASAFUMI , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/419 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide an NOx gas concentration detector for detecting NOx gas concentration low in oxygen concentration dependency in detecting atmosphere. SOLUTION: The detector has a first oxygen ion pump cell 6 for performing the oxygen concentration control of a gas in a first measurement room 2 and a second oxygen ion pump cell 8 where NOx in a second measurement room 4 where a gas controlled in oxygen concentration is diffused is decomposed, and a current corresponding to the concentration of NOx gas due to the dissociated oxygen flows, a second measurement room external electrode 8b of the second oxygen ion pump cell 8 is arranged so that it does not directly come into contact with the outside air of the detector, and a diffusion resistance means 8d for leading oxygen with a diffusion is provided around the electrode 8b.

99. 发明专利

JPH0922774A HEATER DEVICE 失效
公开(公告)号：JPH0922774A
公开(公告)日：1997-01-21
申请号：JP13071296
申请日：1996-04-25
申请人： NGK SPARK PLUG CO
发明人： ISHIDA NOBORU , KITANOYA SHOJI
IPC分类号： H05B3/04 , H05B3/14 , H05B3/40
摘要： PROBLEM TO BE SOLVED: To provide a heater device which has high heat transfer efficiency without requiring the surface of a ceramic heater to be polished. SOLUTION: A cylindrical ceramic heater 4 is fitted into a cylindrical metallic case 1, and a metal layer 7 made of a metal whose melting point is lower than that of the material from which the metallic case 1 is made is cast into the space between the inner surface 1a of the metallic case 1 and the surface 4a of the ceramic heater 4. Therefore, the metal layer of high packing density is formed throughout the gap between the surface 4a of the ceramic heater and the inner surface 1a of the metallic case 1 without polishing the surface 4a.

100. 发明专利

JPH06254723A JUNCTION BODY, ITS COMBINATION BODY WITH CERAMIC, AND THEIR MANUFACTURE 失效
公开(公告)号：JPH06254723A
公开(公告)日：1994-09-13
申请号：JP7111893
申请日：1993-03-04
申请人： NGK SPARK PLUG CO
发明人： ISHIDA NOBORU , YOSHIKAWA TAKAYA
IPC分类号： B23P11/00 , B23K1/19 , B23K11/00 , B23K15/00 , B23K20/12 , C04B37/02
摘要： PURPOSE:To prevent the unbalanced change and breakage of a junction body such as a rotary shaft operated for a long period at a high speed and a high temperature by bonding a quenched metal member having specific hardness and a deposition hardening low-thermal expansion metal having specific strength to obtain the desired junction body. CONSTITUTION:A ceramic turbine rotor 12 provided with multiple blades 12b on the outer periphery of a solid hub 12a and a rotary shaft 13 formed with a metal shaft 14 and a sleeve 15 as a junction body are bonded to constitute a turbo charger rotor 11 as a combination body. A metal shaft 14 quenched while gas is used as a cooling medium and having the hardness of HRC 28 or above and a deposition hardening low-thermal expansion metal having the 0.2% yield strength of 500 Mpa or above are integrally bonded by friction pressure welding or electron beam welding, a recess is formed on the end face of the low-thermal expansion metal, and two ring grooves 15a, 15b are machined on the outer periphery of the sleeve 15 of the rotary shaft 13. The shaft 12c of the turbine rotor 12 is pressed into the recess of the sleeve 15 and integrated.

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