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公开(公告)号：US10690571B2
公开(公告)日：2020-06-23
申请号：US15814796
申请日：2017-11-16
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hirokazu Murase , Takeshi Sugiyama
Abstract: A particulate detection system (10, 1010) includes a sensor section (100) and a sensor drive section (300). A flow EIF of a measurement target gas EI passes through the sensor section, and an amount M of particulates S is detected. The sensor section (100) includes an ion applying section (100e) which generates ions CP, discharges ion-adhering electrified particulates SC, and collects unadhered ions CPF. The sensor drive section includes a sensor current value obtainment section (530) for obtaining a sensor current value Ss corresponding to the amount QH of flowed out charge, a flow velocity obtainment section (510) for obtaining, the flow velocity Vg of the external gas flow, and a particulate amount obtainment section (550, 1550) for obtaining the amount M of particulates S. The influence of flow velocity Vg is mitigated using the sensor current value Ss and the flow velocity Vg.
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公开(公告)号：US10006883B2
公开(公告)日：2018-06-26
申请号：US14591499
申请日：2015-01-07
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takeshi Sugiyama , Masayuki Motomura , Norimasa Osawa , Keisuke Tashima , Hirokazu Murase , Toshiya Matsuoka
IPC: G01N27/70
CPC classification number: G01N27/70
Abstract: A particulate sensor (1) includes an ion source (15) and a reference potential member (45). The particulate sensor (1) detects particulates S contained in a gas under measurement EG by means of ions CP. The ion source (15) includes a ceramic structure (100) having a ceramic laminate (101) and a discharge electrode member (110). The discharge electrode member (110) has an inter-layer portion (112A, 111) embedded between the layers of the ceramic laminate (101) and an exposed portion (112B) extending from the inter-layer portion (112A, 111) to a position outside the ceramic laminate (101). The discharge electrode member (110) generates the gaseous discharge between the reference potential member (45) and the exposed portion (112B) including one or more needle-shaped distal end portions (1125) upon application of a constant DC discharge potential PV2.
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公开(公告)号：US09897528B2
公开(公告)日：2018-02-20
申请号：US14911363
申请日：2014-06-27
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Masayuki Motomura , Takeshi Sugiyama , Kazunari Kokubo
CPC classification number: G01N15/0656 , F01N9/002 , F01N11/00 , G01N2015/0046
Abstract: A particulate detection system (1) for detecting the quantity of particulates S in a gas under measurement EG includes first heater energization means S2 to S3, current convergence determination means S4 to S5, S7 to S8, second heater energization means S6, and detection start means S10. S2 to S3 performs low-temperature energization of heater (78) for a predetermined period after operation of ion source (11) is started by ion source drive circuit (210) such that gaseous discharge current Id becomes equal to a predetermined target current It. S4 to S5, S7 to S8 determines, after elapse of the predetermined period, whether or not Id has converged to an allowable range IR. When S4 to S5 determines that Id has not yet converged, S6 performs high-temperature energization of the heater (78) until Id converges. Then, S10 starts detection of particulates S using signal Is detected by a detection circuit (230).
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公开(公告)号：US10209173B2
公开(公告)日：2019-02-19
申请号：US15305320
申请日：2015-08-21
Applicant: NGK Spark Plug Co., LTD.
Inventor： Takeshi Sugiyama , Masayuki Motomura , Norimasa Osawa , Keisuke Tashima , Toshiya Matsuoka
Abstract: A particulate sensor includes: an inner metallic member which is maintained at a first potential and which has a gas introduction pipe into which a target gas is introduced; a tubular outer metallic member which surrounds the radially outer circumference of the inner metallic member and which is attached to a gas flow pipe to thereby be maintained at a ground potential; and an insulating spacer which is interposed between the inner metallic member and the outer metallic member so as to electrically insulate them from each other and which has a tubular gas contact portion which is exposed to the interior of the gas flow pipe and comes into contact with the gas under measurement. The insulating spacer has a heater for heating the gas contact portion. The heater includes a heat generation resistor embedded in the insulating spacer.
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公开(公告)号：US09915587B2
公开(公告)日：2018-03-13
申请号：US14420960
申请日：2013-09-10
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takeshi Sugiyama , Masayuki Motomura , Keisuke Tashima , Toshiya Matsuoka
CPC classification number: G01M15/102 , G01N15/06 , G01N15/0656 , G01N27/70 , G01N33/0009 , G01N2015/0046
Abstract: A particulate sensor (1) which detects particulates S contained in a gas under measurement (EG) flowing within a gas flow pipe (EP) has a space forming portion (12) and an ion source (15). The space forming portion (12) projects into the gas flow pipe EP and forms an internal space MX. The space forming portion (12) has an introduction port (43I) and a discharge port (48O) for discharging from the internal space MX the gas EGI introduced through the introduction port (43I). The source (15) produces ions CP by gaseous discharge. The space forming portion (12) is configured such that the introduced gas EGI is discharged from the internal space MX through the discharge port (48O), the gas under measurement EG is introduced into the internal space MX through the introduction port (43I), and the introduced gas EGI is mixed with the ions CP produced by the ion source (15).
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Patent Agency Ranking
公开(公告)号：US09581069B2
公开(公告)日：2017-02-28
申请号：US14374247
申请日：2013-03-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Masayuki Motomura , Takeshi Sugiyama , Keisuke Tashima , Toshiya Matsuoka , Hitoshi Yokoi
CPC classification number: F01N11/00 , F01N2560/05 , G01M15/102 , G01N15/0656 , G01N27/68 , G01N2015/0046 , G01R31/025
Abstract: A particulate detection system (1) for detecting the amount of particulates S in a gas under measurement EG includes a detection section (10), a drive circuit (210, 240), and a drive control section (225). The detection section includes a first potential member (31, 12, 13) maintained at a first potential PV1, a second potential member (14, 51, 53) maintained at a second potential PVE, PV3, and an insulating member (121, 77, 76) disposed between the first and second potential members. The system includes insulation test means (215, S3, 245, S5) for testing the degree of insulation between the first and second potential members. The drive control section includes drive permission/prohibition determination means S4, S6 for determining, on the basis of the degree of insulation tested by the insulation test means, whether to permit the drive of the detection section by the drive circuit.
Abstract translation: 用于检测被测气体中的微粒S量的微粒检测系统（1）包括检测部分（10），驱动电路（210,240）和驱动控制部分（225）。 检测部分包括保持在第一电位PV1的第一电位部件（31,12,13），保持在第二电位PVE，PV3的第二电位部件（14,51,53）和绝缘部件 ，76）设置在第一和第二电位部件之间。 该系统包括用于测试第一和第二潜在构件之间的绝缘程度的绝缘测试装置（215,3S，245，S5）。 驱动控制部分包括驱动允许/禁止确定装置S4，S6，用于基于由绝缘测试装置测试的绝缘程度来确定是否允许驱动电路驱动检测部分。
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公开(公告)号：US11137332B2
公开(公告)日：2021-10-05
申请号：US16505262
申请日：2019-07-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takeshi Sugiyama , Yoshinori Hibino
Abstract: A particulate detection apparatus for controlling a particulate sensor which detects the amount of particulates discharged from a filter for collecting particulates contained in exhaust gas. The particulate sensor includes a detection section configured to electrify particulates contained in exhaust gas so as to produce electrified particulates. The particulate detection apparatus includes a period judgment section, an output obtainment section and an anomaly judgment section. The period judgment section judges whether or not the present point in time is within a previously set anomaly determination period just after completing a filter regeneration process. The output obtainment section obtains a sensor output representing the result of detection by the particulate sensor in the case where the present point in time is judged to be within the anomaly determination period. The anomaly judgment section judges whether or not the particulate sensor is anomalous based on the sensitivity characteristic of the sensor output.
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公开(公告)号：US10094756B2
公开(公告)日：2018-10-09
申请号：US14872447
申请日：2015-10-01
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Toshiya Matsuoka , Takeshi Sugiyama
Abstract: A particulate measurement system includes an ion generation section for generating ions by means of corona discharge; an electrification chamber for electrifying particulates contained in a gas under measurement; a measurement signal generation circuit for generating a measurement signal which correlates with the amount of the particulates; and a particulate amount determination section for determining the amount of the particulates. The particulate measurement system further includes a particle diameter estimation section for estimating the particle diameter of the particulates contained in the gas under measurement. The particulate amount determination section performs correction by multiplying the measurement signal or the amount of the particulates determined from the measurement signal by a coefficient relating to the ratio between the estimated particle diameter and a reference particle diameter.
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公开(公告)号：US20150204759A1
公开(公告)日：2015-07-23
申请号：US14420960
申请日：2013-09-10
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takeshi Sugiyama , Masayuki Motomura , Keisuke Tashima , Toshiya Matsuoka
CPC classification number: G01M15/102 , G01N15/06 , G01N15/0656 , G01N27/70 , G01N33/0009 , G01N2015/0046
Abstract: A particulate sensor (1) which detects particulates S contained in a gas under measurement (EG) flowing within a gas flow pipe (EP) has a space forming portion (12) and an ion source (15). The space forming portion (12) projects into the gas flow pipe EP and forms an internal space MX. The space forming portion (12) has an introduction port (43I) and a discharge port (48O) for discharging from the internal space MX the gas EGI introduced through the introduction port (43I). The source (15) produces ions CP by gaseous discharge. The space forming portion (12) is configured such that the introduced gas EGI is discharged from the internal space MX through the discharge port (48O), the gas under measurement EG is introduced into the internal space MX through the introduction port (43I), and the introduced gas EGI is mixed with the ions CP produced by the ion source (15).
Abstract translation: 检测在气体流量管（EP）内流动的被测气体（EG）中所含的微粒S的微粒传感器（1）具有空间形成部（12）和离子源（15）。 空间形成部分（12）突出到气体流量管EP中并形成内部空间MX。 空间形成部分（12）具有用于从内部空间MX排出通过引入口（43I）引入的气体EGI的引入口（43I）和排出口（48O）。 源（15）通过气体放电产生离子CP。 空间形成部分（12）被构造成使得引入气体EGI通过排出口（48O）从内部空间MX排出，测量气体EG通过引入口（43I）被引入到内部空间MX中， 引入气体EGI与由离子源（15）产生的离子CP混合。
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公开(公告)号：US10401273B2
公开(公告)日：2019-09-03
申请号：US15517420
申请日：2015-10-13
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takeshi Sugiyama , Masayuki Motomura , Norimasa Osawa , Hirokazu Murase
Abstract: A particle detection system (1) includes a particle sensor (10) having a detection section (11) exposed to a gas under measurement EG. The particle sensor (10) includes an insulating member (121, 100), and a heater section (150, 105) for heating at least a portion of the gas contact surface (121s, 101s) of the insulating member (121, 100). The particle detection system (1) includes adhesive restraining energization means (225, 223, S4, S10) for heating the gas contact surface (121s, 101s) to an adhesion restraining temperature Td at which adhesion of the particles S to the gas contact surface (121s, 101s) is restrained as compared with the case where the heater section is not energized, wherein adhering particles SA which are particles adhering to the gas contact surface (121s, 101s) burn at the particle burning temperature Tb.
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