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31. 发明专利

JP2000268944A CERAMIC HEATER, ITS MANUFACTURE, AND GAS SENSOR 失效
公开(公告)号：JP2000268944A
公开(公告)日：2000-09-29
申请号：JP12024899
申请日：1999-04-27
申请人： DENSO CORP
发明人： SHIRAI MAKOTO , KUROKI HISAO , KOBAYASHI MASAYUKI , YAMADA KOICHI
IPC分类号： G01N27/409 , G01N27/406 , H05B3/02 , H05B3/20
摘要： PROBLEM TO BE SOLVED: To provide a ceramic heater and its manufacturing method capable of remarkably rationalizing a production process and reducing production cost. SOLUTION: The ceramic heater has a body part 10 having almost a square cross section formed by stacking a heater substrate having a heater pattern layer comprising a heat generating part and a lead part 22, and a covered substrate for covering the heater pattern layer. A metal terminal part 3 electrically connected to the lead part 22 is installed on the main surface (a top surface 17 or a bottom surface 18) in the substrate stacking direction in the body part 10, and an outer lead wire 4 is joined with the metal terminal part 3 with a joining layer 5.

32. 发明专利

JP2002250459A FLOW CONTROL VALVE 失效
公开(公告)号：JP2002250459A
公开(公告)日：2002-09-06
申请号：JP2001044882
申请日：2001-02-21
申请人： DENSO CORP
发明人： MAKINO MASAAKI , YAMADA KOICHI
IPC分类号： F02M59/34 , F02M51/02 , F02M59/46 , F16K31/06
摘要： PROBLEM TO BE SOLVED: To prevent malfunctions which are caused by trapping and jamming of foreign particles. SOLUTION: In an electromagnetic valve 40, a needle-like valve body 42 is housed slidably in a valve body 41. An armature 50 is housed in an armature chamber 49, formed by a valve housing 48. Through passages 46, 55, axially penetrating are formed within the valve body 42 and the armature 50 and the tip end of the valve body 42 is press fitted fixedly in the through passage 55. The armature 50 faces a stator 52 at a fixed distance. In addition, a fluid communicated pathway 54, which is in fluid communication with a fuel reservoir chamber 19 and the armature chamber 49, is provided within the valve housing 48. Thus, fuel in the fuel reservoir chamber 19 flows into the armature chamber 49 via the fluid communicated pathway 54 and further flows into the through passages 46, 55 via gap between the armature 50 and the stator 52, and at the same time, flows into the through passage 46 via the outer periphery of the armature 50 and a flow passage 47 of the valve body 42.

33. 发明专利

JP2001141689A GAS SENSOR 失效
公开(公告)号：JP2001141689A
公开(公告)日：2001-05-25
申请号：JP2000227489
申请日：2000-07-27
申请人： DENSO CORP
发明人： SUGINO HIROSHI , OZAWA NAOTO , NAKANO SHUICHI , YAMADA KOICHI
IPC分类号： G01N27/409 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide a gas sensor in which a lead wire, a metallic terminal and the like are hard to short-circuit and which can obtain stable sensor outputs. SOLUTION: A first guide 531 is formed to the side of a leading end of each first insertion hole of an elastic insulating member 5. A second guide 331 is set to the side of a root end of each second insertion hole of an insulating insulator 3. Movement of a lead wire 161 and a metallic terminal 49 is restricted by the first guide 531 and the second guide 331.

34. 发明专利

JPH09250941A DEVICE FOR MEASURING VOLUME 失效
公开(公告)号：JPH09250941A
公开(公告)日：1997-09-22
申请号：JP5977196
申请日：1996-03-15
申请人： DENSO CORP
发明人： OKADA MINORU , OKAMOTO YOSHIYUKI , YAMADA KOICHI , YAMAGUCHI KAZUHIKO , HASEDA TETSUSHI
IPC分类号： G01F17/00 , G01F22/02
摘要： PROBLEM TO BE SOLVED: To highly accurately measure space volume and highly accurately determinate the residual thereof even if the residual quantity of fuel of a fuel tank is small and a space volume is large. SOLUTION: The residual operation part 73 of CPU 14 measures the space volume of a fuel tank from pressure change ΔP subtracting the pressure change of the fuel tank from that of a reference vessel and the other pressure change Pt of the fuel tank, and the space volume is subtracted from the capacity of the fuel tank to calculate the residual quantity of fuel. Since the pressure changes ΔP, Pt are obtained from the output of a pressure sensor 5, for a line sending an electric signal from the pressure sensor 5 to an AD conversion part 71 of CPU 14, a gain switch part 70 in which a sensor signal is amplified 250 times in a case where the residual quantity of calculation of the residual operation part 73 is smaller than 20 liters, and it is amplified 75 times in another case where the residual quantity is larger than 20 liters is provided. Even if the residual quantity is small, the sensor signal of higher voltage than the conventional is supplied to the AD conversion part 71. Consequently, residual quantity measuring precision can be enhanced as compared with the conventional.

35. 发明专利

JP2003222606A GAS SENSOR 审中-公开
公开(公告)号：JP2003222606A
公开(公告)日：2003-08-08
申请号：JP2002283916
申请日：2002-09-27
申请人： DENSO CORP
发明人： YAMADA KOICHI , KOJIMA TAKASHI
IPC分类号： G01N27/409 , G01N27/407 , G01N33/00
摘要： PROBLEM TO BE SOLVED: To provide a gas sensor that realizes a hermetic seal between an isolating insulator at an element side and a housing only with metallic packing. SOLUTION: In the gas sensor, the cylindrical housing 10 is hermetically inserted with the isolating insulator 3 at the element side via the annular metallic packing 11, and a receiving surface 103 is placed on inside surface of the housing 10. The isolating insulator 3 at the element side is composed of a small diameter part and large diameter part with a large diameter structured, and a taper surface 33 extending from the side of the small diameter part to the outside of a diameter direction. The receiving surface 103 supports the taper surface 33 via the metallic packing 11, and the taper surface 33 and the metallic packing 11 are contacted at the end of the outer circumference of the taper surface 33 where the contacting shape of both of them is a line contact. COPYRIGHT: (C)2003,JPO

36. 发明专利

JP2002174622A METHOD AND DEVICE FOR MANUFACTURING GAS SENSOR 审中-公开
公开(公告)号：JP2002174622A
公开(公告)日：2002-06-21
申请号：JP2001228204
申请日：2001-07-27
申请人： DENSO CORP
发明人： YAMADA KOICHI , OZAWA NAOTO
IPC分类号： G01N27/41 , B23K26/12 , B23K26/28 , G01N27/409 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing gas sensor capable of positively fixing an atmosphere side cover to an aimed position of a housing and airtightly fixing an element side insulator and a sensor element to the housing. SOLUTION: A load is applied in the axial direction to insert the tip side of the atmosphere side cover 10 into the base end side of the housing 19. An overlapping portion of the housing 19 and the atmosphere side cover 10 is temporarily fixed in a state applied with the load. The housing 19 and the atmosphere side cover 10 are joined together by applying a final weld to the overlapping portion while rotating both the temporarily fixed housing 19 and atmosphere side cover 10 using the axial direction of the housing 19 as rotation axis.

37. 发明专利

JP2001228112A MOUNTING STRUCTURE OF GAS SENSOR 失效
公开(公告)号：JP2001228112A
公开(公告)日：2001-08-24
申请号：JP2000036728
申请日：2000-02-15
申请人： DENSO CORP
发明人： YAMADA KOICHI
IPC分类号： G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide a mounting structure of gas sensor capable of efficiently introducing a measuring gas flowing in a pipe into a measuring gas-side cover through an inlet port. SOLUTION: This mounting structure is a mounting structure for inserting and fixing a gas sensor 1 having a housing 10 having a sensor element 11 mounted thereon, a measuring gas-side cover 12 provided on the tip side 109 thereof, and inlet ports 121 and 131 on the side surface to a mounting hole 200 provided on the pipe 2. The central position of the inlet port 121 located on the endmost side in the measuring gas-side cover 12 is set within the range of a diameter W based on the central axis 20 of the pipe 2, and the W is set to 1/3 or less of the diameter R of the pipe.

38. 发明专利

JP2000321236A GAS SENSOR 失效
公开(公告)号：JP2000321236A
公开(公告)日：2000-11-24
申请号：JP2000125974
申请日：2000-04-26
申请人： DENSO CORP
发明人： FUKAYA KENJI , YAMAUCHI MASANOBU , WATABE ISAO , YAMADA KOICHI , KOJIMA TAKASHI
IPC分类号： G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide a gas sensor sufficiently introducing atmosphere to a reference gas chamber. SOLUTION: This gas sensor comprises a housing 10 into which a detecting element 2 provided with a reference gas chamber is inserted and arranged, a first metal cover 11 with one end fixed to the housing 10, and a second metal cover 12 arranged on the outer circumference of the first metal cover 11. An insulating/holding member 1 3 in the first metal cover 11 is arranged in such a way as to be opposed to a first air vent 110. By making the outside shape of the insulating/holding member 3 different from the inside shape of the first metal cover 11, a reference gas passage part 115 is provided in between with the first metal cover 11. In addition, the first metal cover 11, the second metal cover 12, and a water repellent filter 13 are each caulked and fixed outside the insulating/holding member 3.

39. 发明专利

JP2000088795A GAS SENSOR 失效
公开(公告)号：JP2000088795A
公开(公告)日：2000-03-31
申请号：JP36940198
申请日：1998-12-25
申请人： DENSO CORP
发明人： WATABE ISAO , YAMADA KOICHI , KOJIMA TAKASHI
IPC分类号： G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide a gas sensor which is superior in productivity and built-in property without the fear of separating an electrode film and a coating layer of a gas concentration-detecting element such as an oxygen-detecting element or the like. SOLUTION: An oxygen sensor 1 as the sensor has a gas concentration- detecting element 10 with a touch gas part to be in touch with a gas to be measured, a housing 41 for holding the gas concentration-detecting element 10 and a protecting cover 21 for covering the touch gas part of the gas concentration-detecting element 10 with having a gas hole for circulation of the gas to be measured. A looped groove 45 is provided between a caulked projecting part 43 and an inner projecting part 44 at the side of the gas of the housing 41. An opening flange 213 of the protecting cover 21 is fitted in the looped groove 45 and moreover, the caulked projecting part 43 is caulked to a direction of the protecting cover 21. A projection length of the inner projecting part 44 of the housing 41 is shorter than a projection length of the caulked projecting part 43.

40. 发明专利

JPH10282043A OXYGEN SENSOR ELEMENT AND MANUFACTURE OF HEATER FOR THE SAME 失效
公开(公告)号：JPH10282043A
公开(公告)日：1998-10-23
申请号：JP3819598
申请日：1998-02-03
申请人： DENSO CORP
发明人： YAMADA KOICHI , KOJIMA TAKASHI , HORI MAKOTO , HAMAYA MASAHIRO , OTA MINORU
IPC分类号： G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide an oxygen sensor element having a heater which is excellent in temperature raising property and secures sufficient quantity of air to be introduced into an air chamber while enabling efficiently manufacturing thereof and a manufacturing method of the heater used for the oxygen sensor element. SOLUTION: A heater 2 is built into an air chamber 100 to form an oxygen sensor element 1. The cross section of the heater 2 is roughly rectangular in shape. In the manufacturing of the heater 2, a ceramic green sheet is prepared and a plurality of heater patterns are formed by printing. Other sheets are laminated on the green sheet to build a laminate body. Then, the laminate body is cut to make an intermediate body, which then is baked by heat.

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