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    • 3. 发明专利
    • Gas sensor control device
    • 气体传感器控制装置
    • JP2009229148A
    • 2009-10-08
    • JP2008072626
    • 2008-03-20
    • Denso CorpNippon Soken Inc株式会社デンソー株式会社日本自動車部品総合研究所
    • HANEDA SATOSHIISHIKAWA TAKAYUKIAKIMOTO KATSUHIDE
    • G01N27/416G01N27/419
    • G01N27/406G01N27/4062G01N27/4065G01N27/407G01N27/409G01N27/419
    • PROBLEM TO BE SOLVED: To improve detection precision when detecting the concentration of a specific component, such as NOx concentration.
      SOLUTION: In an Nox sensor circuit 40, an Im detection circuit section 45 for detecting a monitor cell current Im and an Is detection circuit section 46 for detecting a sensor cell current Is are connected to negative side terminals MS-, SS- of a monitor cell 34 and a sensor cell 35, respectively. A monitor cell current measurement value VM1 output from the Im detection circuit section 45 is also input to a current adjustment circuit section 47, and further the output of the current adjustment circuit section 47 is input to the Is detection circuit section 46. The current adjustment circuit section 47 variably sets an adjustment current according to the output (the monitor cell current measurement value VM1) of the Im detection circuit section 45, and allows the adjustment current to flow in a direction for sucking current from the side of the Is detection circuit section 46, thus allowing the Is detection circuit section 46 to measure current obtained by subtracting the adjustment current from the sensor cell current Is to output the measurement results to a microcomputer 41.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了提高检测NOx浓度等特定成分的浓度时的检测精度。 解决方案:在Nox传感器电路40中,用于检测监视单元电流Im的Im检测电路部分45和用于检测传感器电池电流Is的Is检测电路部分46连接到负侧端子MS-,SS- 的监视器单元34和传感器单元35。 从Im检测电路部分45输出的监视器电池电流测量值VM1也被输入到电流调节电路部分47,并且进一步将电流调节电路部分47的输出输入到Is检测电路部分46.电流调节 电路部分47根据Im检测电路部分45的输出(监视电池电流测量值VM1)可变地设置调节电流,并且允许调节电流沿着从Is检测电路侧吸取电流的方向流动 从而允许Is检测电路部分46测量通过从传感器电池电流Is减去调节电流而获得的电流,以将测量结果输出到微计算机41.版权所有(C)2010,JPO&INPIT
    • 9. 发明专利
    • Gas sensor
    • 气体传感器
    • JP2013050440A
    • 2013-03-14
    • JP2012126737
    • 2012-06-04
    • Ngk Spark Plug Co Ltd日本特殊陶業株式会社
    • ITO TETSUYATERAMOTO SATOSHIMORI KENTARO
    • G01N27/419
    • G01N27/406G01N27/4062G01N27/407G01N27/409G01N27/41G01N27/419
    • PROBLEM TO BE SOLVED: To provide a technology for suppressing the oscillation of feedback control, in a gas sensor driven by the feedback control.SOLUTION: In a gas sensor 100, an oxygen pump cell 135 and an oxygen concentration detection cell 150 are laminated and disposed over a spacer 145. The spacer 145 is formed with a gas detection chamber 145c facing electrodes 137 and 152 of the cells 135 and 150. The oxygen concentration detection cell 150 generates output voltage corresponding to the oxygen concentration of the gas detection chamber 145c. The oxygen pump cell 135 pumps in/out oxygen to/from the gas detection chamber 145c according to a pump current inputted so as to make output voltage generated in the oxygen concentration detection cell 150 become predetermined target voltage. Between the oxygen concentration detection cell 150 and the oxygen pump cell 135, a leaking portion for connecting both is formed while including zirconia as main constituents.
    • 要解决的问题:提供一种用于抑制由反馈控制驱动的气体传感器中的反馈控制的振荡的技术。 解决方案:在气体传感器100中,将氧泵电池135和氧浓度检测电池150层叠并设置在间隔件145上。间隔件145形成有面对电极137和152的气体检测室145c 氧浓度检测单元150生成与气体检测室145c的氧浓度对应的输出电压。 氧泵单元135根据输入的泵电流向/从气体检测室145c输入/输出氧,以使得在氧浓度检测单元150中产生的输出电压成为预定的目标电压。 在氧浓度检测单元150和氧气泵单元135之间,形成用于连接两者的泄漏部分,同时包括氧化锆作为主要成分。 版权所有(C)2013,JPO&INPIT